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Talc is a common mineral that is widely used in various industries such as cosmetics, ceramics, papermaking, and coatings. It is a soft mineral with a Mohs hardness of 1 and has good heat resistance, chemical stability, and electrical insulation properties. With the continuous development of industry and technology, the demand for talc powder is increasing, and the market prospect is broad.

To meet the increasing demand for talc powder, manufacturers are developing new and advanced equipment for talc powder production. Among them, the talc powder Raymond mill and ultra-fine grinding mill are two commonly used equipment for talc powder grinding. The Raymond mill can process talc into 80-400 mesh talc powder, and the ultra-fine grinding mill can process talc into 3000-10000 mesh talc powder.

The talc powder Raymond mill is an older type of milling equipment, which has stable performance, low price, and mature technology. It is suitable for processing non-explosive and non-flammable materials with a Mohs hardness of less than 7 and a humidity of less than 6%. The ultra-fine grinding mill is a new type of milling equipment developed by manufacturers in recent years. It has higher grinding efficiency, finer particle size, and better quality of finished products. However, its price is relatively higher than the Raymond mill.

When it comes to the price of talc powder, it is affected by various factors such as the market demand, production cost, and transportation cost. Generally, the price of talc powder produced by the Raymond mill is lower than that produced by the ultra-fine grinding mill. However, it is important to note that the quality of the finished product and the production efficiency are also important factors to consider when choosing the equipment and determining the price.

The talc powder Raymond mill and ultra-fine grinding mill are two commonly used equipment for talc powder grinding. The choice of equipment depends on the specific requirements of the production line, such as the required fineness, capacity, and energy consumption. As for the price of talc powder, it is influenced by various factors, and it is necessary to compare the quality of the finished product and the production efficiency when selecting equipment and determining the price.

Tanzania is known for its rich abundance of ore materials, making it a prime location for mining activities. The country is home to a variety of mineral deposits including gold, diamonds, tanzanite, coal, and iron ore. Additionally, Tanzania is also rich in construction materials such as sand, gravel, and stone aggregates.

Our company is proud to offer our top-of-the-line stone crushing plant for use in Tanzania’s mining and construction industries. Our equipment is designed to meet the specific needs of our customers, with a range of customizable options to ensure the best possible results. Our stone crushing plant is ideal for processing various materials, including limestone, granite, basalt, and more.

We believe that our equipment can greatly benefit Tanzania’s mining and construction sectors. Our stone crushing plant is designed to increase productivity and efficiency, while minimizing the risk of downtime and costly maintenance. We are confident that our products can meet the high standards and demands of Tanzania’s mining and construction industries.

If you’re looking for a mini stone crusher or a large stone crushing plant, we have the solution for you. Our company provides both options to meet your specific requirements. For those who need a small jaw crusher or hammer crusher, we offer our diesel jaw crusher that has been modified to fit your needs.

Our mini stone crusher is perfect for small construction sites or DIY projects. It’s compact and easy to operate, making it a great choice for those who need to crush small amounts of material. And if you need something larger, our large stone crushing plant is perfect for industrial sites and larger construction projects.

If you are in need of reliable and efficient stone crushing equipment for your mining or construction project in Tanzania, we highly recommend our products. Contact us today to learn more about our customizable solutions and how they can benefit your business.

Rotary dryer and rotary kiln are commonly used for drying and heating materials in various industries. Gears play an important role in these machines, as they are responsible for transmitting power and ensuring smooth operation. Our company specializes in the production of rotary dryer and kiln gears, and we can manufacture any type of gear to meet our customers’ needs. Whether you need a replacement gear or a custom-made gear for a new project, we have the expertise to deliver high-quality products that are built to last. Our gears are made from the finest materials and are precision-engineered to ensure optimal performance and durability. With our rotary dryer and kiln gears, you can trust that your machines will operate smoothly and efficiently.

Rotary kiln gear is a critical component in the rotary kiln system, which helps to transmit power and torque from the motor to the kiln. Due to the harsh operating conditions of the rotary kiln, the gear is subject to wear and tear and may need to be replaced periodically. The frequency of replacement depends on several factors, including the load capacity of the gear, the operating conditions of the kiln, and the quality of the gear.

To ensure the smooth operation of the rotary kiln gear, it is essential to maintain it regularly. Proper maintenance includes lubrication of the gear, monitoring the gear’s wear and tear, and ensuring the gear is properly aligned. Lubrication of the gear is essential to reduce friction and prevent overheating, which can lead to premature wear of the gear. Monitoring the gear’s wear and tear helps to detect any signs of damage early, which allows for timely repairs or replacement.

In addition, proper alignment of the gear is essential to ensure that it functions correctly. Misalignment can lead to increased wear and tear, vibrations, and even gear failure. Regular inspection and adjustment of the gear’s alignment can help to prevent these problems.

In summary, the rotary kiln gear is an important component in the rotary kiln system, and its proper maintenance is essential to ensure the smooth and efficient operation of the kiln. Regular inspection, lubrication, and alignment are key factors in maintaining the gear’s performance and extending its lifespan.

Orthoclase is a common feldspar mineral found in Tunisia. It is used in a variety of industries such as ceramics, glass, and construction due to its excellent physical properties. As a leading Orthoclase screening manufacturer, we offer high-quality vibrating screens for sale in Tunisia. Our screens are specifically designed to efficiently separate and classify Orthoclase particles, ensuring a high-quality final product.

There are other stone materials found in Tunisia, including:

• Marble: Tunisia has a rich supply of marble, which is a popular material used for construction and decoration. Tunisian marble is known for its high quality and unique color patterns.
• Limestone: Limestone is also abundant in Tunisia and is widely used in the construction industry for building materials such as cement and aggregates. It is also used as a decorative stone for flooring and walls.
• Sandstone: Sandstone is a sedimentary rock that is found in various colors and patterns in Tunisia. It is commonly used for building facades, cladding, and landscaping.
• Basalt: Basalt is a volcanic rock that is found in Tunisia and is used for various purposes such as building construction, road construction, and landscaping.
• Granite: Granite is a popular stone material in Tunisia and is commonly used for countertops, flooring, and building facades. It is known for its durability and resistance to wear and tear.

These stone materials can also be processed using our Orthoclase screening and crushing equipment to meet the specific needs of customers.

In addition to our screening equipment, we also provide complete Orthoclase crushing solutions with our advanced crushers and mills. Our crushing equipment is designed to handle even the toughest materials, ensuring efficient and reliable performance. Whether you are looking to upgrade your existing crushing and screening system or set up a new plant, our team of experts can help you design and customize the perfect solution for your specific needs.

At our company, we pride ourselves on providing top-quality equipment at competitive prices, backed by exceptional customer service and technical support. Our vibrating screens and crushing equipment are highly reliable and durable, ensuring maximum uptime and minimal maintenance. Contact us today to learn more about our Orthoclase screening and crushing solutions, and discover how we can help you achieve greater productivity and profitability.

Jaw crushers are a popular type of crushing equipment, widely used in the mining, quarrying, and recycling industries. The capacity of a jaw crusher is a crucial parameter for choosing the right equipment for your operations. Generally, the larger the capacity of the jaw crusher, the higher the processing capacity of your crushing line.

In the Philippines, there are various types of stones used for construction purposes. One of the most common types is granite, which is widely used for both indoor and outdoor applications. It is a durable and versatile stone that can be used for flooring, countertops, walls, and even as decorative features. Limestone is also a commonly used stone in the Philippines. It is a sedimentary rock that is formed from the accumulation of shells, coral, and other organic materials. It is used for a wide range of applications, including flooring, walls, countertops, and even as decorative features.

In the Philippines, jaw crushers are commonly used in concrete crushing operations. Concrete is a composite material composed of cement, sand, gravel, and water. It is widely used for building construction and infrastructure projects. A concrete jaw crusher is an ideal choice for primary crushing. It can crush various types of concrete, including stone, limestone, and more.

The capacity of a jaw crusher is determined by the size and shape of the feed opening, as well as the stroke and speed of the machine. Generally, the larger the feed opening, the higher the capacity. Additionally, the longer the stroke and the faster the speed, the higher the production capacity. Therefore, it is important to choose the right jaw crusher based on your specific needs and requirements.

When considering purchasing a jaw crusher for your operations, it is important to choose a reputable manufacturer. They should offer high-quality equipment that meets industry standards and specifications. In addition, a reliable manufacturer will offer after-sales support, including maintenance and repair services.

At our company, we offer a range of jaw crushers for sale in the Philippines, suitable for a variety of applications. Our jaw crushers have different capacities and can crush different materials, including concrete, stone, and limestone. We are committed to providing our customers with high-quality equipment and exceptional after-sales service.

Cristobalite is a mineral that belongs to the quartz family and is commonly found in volcanic rocks. It has various industrial applications, including as a filler in rubber, coatings, and plastics, and as a refractory material. The demand for cristobalite powder has been increasing due to its unique properties, such as high heat resistance, low thermal expansion, and high refractive index.

To meet the demand for high-quality cristobalite powder, a grinder for cristobalite has been developed. The Cristobalite Raymond mill is a high-end grinding equipment that is designed to grind cristobalite into fine powder. It is capable of producing 200mesh cristobalite powder, which is widely used in various industries.

The grinder for cristobalite adopts advanced technology and high-quality materials to ensure its reliability and efficiency. Its grinding chamber and blade are made of high-quality alloy steel, which ensures the grinding process is smooth and efficient. The air blower and the circulating air path ensure that the powder is classified and collected effectively.

The 200mesh cristobalite powder grinder has a high production capacity, which can meet the needs of large-scale production. The grinding process is fully automated, which reduces labor costs and improves production efficiency. Furthermore, the grinder is easy to operate and maintain, which ensures its long service life and low maintenance costs.

The Cristobalite Raymond mill is a high-end grinding equipment that is designed to produce 200mesh cristobalite powder. Its advanced technology, high-quality materials, and efficient grinding process make it the ideal choice for industries that require high-quality cristobalite powder. If you are looking for a reliable and efficient cristobalite powder grinder, then the Cristobalite Raymond mill is the perfect solution for you.

Australia is a country with a diverse range of geological formations, which gives rise to a wide variety of rock materials. Some of the most common rock materials found in Australia include:

• Basalt: Basalt is a dark-colored volcanic rock that is formed from the rapid cooling of lava. It is commonly found in areas of volcanic activity and is used in construction for road building, as a base for pavements, and in the production of concrete.
• Granite: Granite is a hard and durable rock that is formed from the slow cooling of magma deep underground. It is a popular material for construction and is used in buildings, bridges, monuments, and countertops.
• Sandstone: Sandstone is a sedimentary rock that is formed from the accumulation of sand grains. It is commonly used in construction for buildings, walls, and decorative features, as well as in landscaping.
• Limestone: Limestone is a sedimentary rock that is formed from the accumulation of shell and coral fragments. It is used in construction for buildings, walls, and decorative features, as well as in the production of cement.
• Ironstone: Ironstone is a type of sedimentary rock that is rich in iron oxide. It is commonly used in construction for walls and decorative features, as well as in the production of iron and steel.

Are you looking for a high-quality and reliable rock crusher for your crushing needs in Australia? Look no further than our rock crusher, which offers a range of advantages that make it an ideal choice for customers in Australia. Firstly, our rock crusher is versatile and capable of crushing a wide range of rock materials, including basalt, granite, sandstone, limestone, and ironstone. This makes it a versatile solution that can be used in a variety of applications.

At our company, we are committed to providing our customers in Australia with the highest quality rock crusher at an affordable price. We understand the challenges faced by our customers in the rock crushing industry, and we strive to deliver a reliable, efficient, and durable solution that meets their needs.

When you choose our rock crusher, you can be confident that you are getting a top-quality machine that is designed to deliver exceptional performance in a range of applications. Our team of experts is always on hand to provide advice and support, and we are dedicated to ensuring that our customers are completely satisfied with their purchase.

So if you’re looking for a reliable and efficient rock crusher that delivers great value for money, look no further than our company. Contact us today to learn more about our rock crusher and how it can help you achieve your crushing goals in Australia.

The main purpose of quartz sand beneficiation and purification is to remove iron impurities. The occurrence state of iron impurities in quartz ore determines whether they can be removed by beneficiation and the degree of removal. It is an important basis for drawing up the beneficiation and purification plan and predicting the separation index to understand the iron impurities in which ore phases exist, in what form, content and distribution. According to many years of experience in removing iron from quartz sand, Fodamon engineers today explain as follows:

A. Existing forms of iron impurities in quartz sand

The occurrence forms of iron impurities in quartz sand are relatively complex and diverse, or exist in clay or feldspar and other mineral phases, or attach to the surface of particles in the form of iron oxide and iron ore, or occur in the interior of quartz particles.

(1) It exists in clay minerals

There are many weathered clays in some exposed sedimentary sand deposits. This kind of clay is weathered from feldspar, limestone, shale, etc. The clay is composed of natural hydrous bauxite silicate containing a mixture of mica, quartz, limonite, chlorite, calcite and amphibole. Its grain size is very fine, mainly composed of 10 μ Particle composition below m.

(2) It exists in heavy minerals and magnetic minerals

Heavy minerals refer to minerals with relative density greater than 2.9. Most of these minerals are magnetic or weakly magnetic, and iron is the basic constituent of these minerals. So we can also call them existing in single minerals, such as magnetite, hematite, pyrite, pyrrhotite, ilmenite, chromite, olivine, limonite, limonite, etc.

(3) It exists in light minerals

Light minerals mainly refer to feldspar (usually orthoclase or microcline). Alumina in feldspar is sometimes replaced by iron oxide, and its amount can reach 0.5% – 0.7%. In addition, there are kaolinite, muscovite, calcite, dolomite, etc. Among these light minerals, iron enters the lattice in the form of isomorphism. Because their density is very close to that of quartz, it is quite difficult to separate them.

(4) In thin film iron

The quartz particles in the quartz sand are white in the pure condition and gray, brown, yellow and even red after being polluted. For example, clay can make it gray or yellow, metal minerals and other dark minerals can make it gray, and film iron can make it yellow or red. Most of the things we see are contaminated quartz sand.

In terms of composition, the pollution of quartz particles is mainly iron pollution and mud pollution. The former refers to the pollution of iron oxide or hydroxide on quartz particles. The latter refers to a series of layered aluminosilicate clay mineral pollution.

In terms of causes, it can be divided into primary pollution and secondary pollution. Primary pollution refers to the phenomenon that the surface or interior of a certain mineral is polluted by other minerals caused by mineral dyeing. Mineralization is a phenomenon that a mineral occurs in the interior or surface of other minerals in the form of particles or films during the mineralization process, which is closely related to the mineralization process. There is also the phenomenon that the surface of quartz particles is polluted by other minerals (or ions) due to adsorption, which is called secondary pollution.

The contamination of quartz particles by clay minerals is related to the surface depressions and cracks of quartz and the plasticity of clay. This kind of clay attached to the surface of quartz particles is easier to remove because they are not firmly bonded. However, the iron oxide film on the surface of quartz particles is difficult to remove, which is caused by mineralization. In fact, the so-called thin film iron mainly refers to this situation.

(5) Exists in a continuum or lattice

All kinds of minerals in quartz sand can be basically considered to have been in the state of monomer dissociation, so there is no need for further crushing, but quartz particles and other iron-bearing minerals are still linked together. Most of these conjoined bodies are dark minerals, some of which are wrapped in the interior of quartz particles, some of which are embedded in the edge of quartz particles and become mineral aggregates. The so-called wrapped iron mainly refers to this situation.

B. Six methods of removing iron from quartz sand

1. Iron removal by mechanical scrubbing

Mechanical scrubbing is to remove the film iron on the surface of quartz sand and the iron-bearing minerals adhering to the surface of quartz sand by means of mechanical external force and collision and friction between sand particles. At present, the scrubbing technology is mainly rod grinding scrubbing and mechanical scrubbing. For mechanical scrubbing, it is generally believed that the main factors affecting the scrubbing effect are the structural characteristics and configuration form of the scrubbing machine, followed by process factors, including scrubbing time and scrubbing concentration. The efficiency of mechanical scrubbing increases with the increase of slurry concentration, because increasing slurry concentration can increase the probability of collision between particles.

Compared with other iron removal processes, this method has the following characteristics:

1) The product quality is good and can meet the quality requirements of float glass for high-quality silica sand;

2) Large output. At present, some small-scale production and processing enterprises use this method to remove iron more, because it is low in cost and simple in operation, but the iron removal rate is relatively low.

2. Iron removal by magnetic separation
   Quartz, the main mineral in quartz sand, is an antimagnetic material, which cannot be magnetized in a magnetic field. The impurity minerals containing iron in quartz sand: hematite, limonite, magnetite, goethite, etc. Most of them are magnetic substances that can be magnetized in the magnetic field. In the magnetic separation process, it is to take advantage of this property difference to remove these iron-containing impurity minerals from quartz sand by magnetic separation. In order to remove iron-bearing minerals and separate magnetic minerals from non-magnetic minerals, the magnetic force acting on magnetic minerals must meet the following conditions: the magnetic force acting on magnetic particles is greater than the combined force of all mechanical forces acting on magnetic particles.

Magnetic separation is divided into dry separation and wet separation. Comparing dry separation and wet separation, it is found that wet high intensity magnetic separation has the defects of high power consumption of magnetic separator, easy wear of medium, large production water consumption, high operation and maintenance costs. The dry high intensity magnetic separation process is easy to operate, and the operation and maintenance costs are lower than the wet type.

In the magnetic separation process, the wet high intensity magnetic separator can maximally remove hematite, limonite, biotite and other weak magnetic impurity minerals, including connective particles. Generally speaking, quartz sand containing mainly weak magnetic impurity minerals can be selected by using wet high magnetic machine at more than 10000 Ost; For the strong magnetic minerals with magnetite as the main impurity, the weak magnetic machine or medium magnetic machine is better for selection. High quality quartz sand concentrate with Fe2O3 of 0.036% can be obtained by using wet high intensity magnetic separator in production. The iron removal effect of wet high intensity magnetic separator is affected by parameters such as feed volume, flushing water volume, magnetic field strength, etc., of which the magnetic field strength has the greatest impact. In addition, the more magnetic separation times, the finer the grain size of quartz sand, the better the iron removal effect.

3. Ultrasonic iron removal
   Ultrasonic wave is a kind of high frequency (frequency greater than 20000 Hz) sound wave that depends on the medium. It has mechanical energy and will interact with the medium in the process of propagation, producing mechanical effect, thermal effect and hole effect. When ultrasonic wave is emitted in water (or solution), it will produce many compression and expansion areas, resulting in the formation and rupture of countless microbubbles (cavitation bubbles), which is called cavitation phenomenon. In the process of cavitation, the internal pressure of the liquid changes suddenly, which is accompanied by a shock wave, and its pressure can reach several thousand to tens of thousands of atmospheres. Under the action of this shock wave, the iron-containing impurities adhering to the particle surface fall off from the particle surface and enter the liquid phase, thus achieving the purpose of removing iron.

Compared with mechanical scrubbing, ultrasonic iron removal can not only remove the impurities on the mineral surface, but also remove the impurities at the cleavage gap of particles. Therefore, its iron removal effect is better. Ultrasonic iron removal is still relatively expensive for silicon sand, a cheap resource. It is still difficult to apply it in large concentrators, but it is possible to use it in production fields that require high purity and low consumption.

4. Flotation iron removal

The flotation method is mainly used to separate feldspar in quartz sand, and also to remove clay minerals such as mica and secondary pig iron in quartz sand. The most typical process is to use hydrofluoric acid as an activator, and use amine cationic collectors for flotation under strong acidity (pH? 2~3). During iron flotation, NaOH can be used to inhibit quartz activated by metal ions; When flotation of feldspar, mica and other clay minerals, H2SO4 can not only produce localized adsorption on the surface of the floated feldspar, reduce the surface negativity, but also activate feldspar and mica.

There are three flotation methods:
The first method is fluorine-acid method. This method is widely used because of its good flotation effect, easy control and stable index. However, fluoride ion has a great impact on soil erosion and the ecological environment of Zhoutong.

The second is fluorine-free and acid-free method. The biggest advantage of this method is to avoid the use of fluoride ions that have destructive effects on the environment, and the production index is stable, but the corrosive effect of strong acid on the beneficiation equipment cannot be ignored. There are high requirements for flotation equipment.

The third is fluorine-free and acid-free method. Under the natural pH condition, a unique high concentration pulp flotation environment is created through the rational allocation of anionic and cationic collectors to achieve the purpose of preferential flotation of impurity minerals. However, due to the strict requirements on raw sand treatment and pulp environment, this method is not easy to control in production and has not been widely used at present. The flotation method has a good effect on the removal of iron existing in heavy minerals. Under acidic conditions, the U.S. silica sand concentrator uses sodium petroleum sulfonate and kerosene as collectors to separate biotite and iron ore, so that the content of Fe2O3 decreases from 0.12% to 0.18% to 0.06% to 0.065%. The flotation process for iron removal is simple, low cost and good effect. This process has played a positive role in expanding the utilization scope of quartz sand resources in China.

5. Iron removal by acid leaching
   Iron removal by acid leaching takes advantage of the fact that quartz is insoluble in acid (except HF) and Fe-containing impurity minerals can be dissolved by acid solution, so as to achieve the purpose of removing iron-containing minerals from quartz sand. Acid leaching can not only remove iron minerals from quartz sand, but also remove non-metallic impurities in quartz.
6. Biological iron removal
   Microbial leaching of film iron or disseminated iron on the surface of quartz sand particles is a newly developed iron removal technology, which is currently in the research stage of laboratory and small-scale tests. According to the results of foreign research, Aspergillus niger, Penicillium, Trichoderma piriformis, Pseudomonas, Bacillus, Bacillus polymyxa, Micrococcus lactis and other microorganisms have achieved good results in leaching iron oxide on the surface of quartz. Among them, Aspergillus niger has the best effect in removing iron, the removal rate of Fe2O3 is up to 88.8%, and the grade of Fe2O3 in quartz sand is as low as 0.008%. The study also found that the effect of leaching iron from the culture solution pre-cultivated by bacteria and mold is better. The rate of iron decomposition of anaerobic bacteria is slower than that of aerobic bacteria. The bacterial leaching sensitivity of different iron oxide minerals is different. The dissolution of iron from limonite is slower than that from goethite, but much faster than that from hematite. It is worth pointing out that the final iron content after leaching is not related to the initial iron content before leaching, but to the existing form of iron in mineral raw materials. Only iron not located in the mineral lattice can be removed by this method.

Bentonite is a water-bearing clay mineral dominated by montmorillonite, also known as porphyry, bentonite or bentonite. It is usually waxy, earthy or greasy, and natural bentonite minerals are mostly light green, maroon and grayish black. The milling machine has prominent value in the processing and production of bentonite. It can grind the bentonite powder into different specifications of finished product fineness, and is widely used in casting sand, drilling mud, metallurgical pellets, oil bleaching and other industries. Therefore, the role of the Raymond mill is very important.

As a large processing equipment, in the process of operation, due to the complex working conditions of the mill, there will always be different degrees of damage, which requires the staff to pay great attention to the maintenance of the bentonite grinder at ordinary times, and pay attention to strengthen the maintenance from ordinary times, so as to maintain the operation state and create more market value with a better attitude. After consulting professional R&D engineers, we have summarized a set of maintenance rules for bentonite grinder, and share them with you here, hoping to help you.

1. Adjustment of some parameters

A. First of all, in its long-term operation, pay attention to the adjustment of the air volume. The air volume control valve of the equipment is located on the air inlet pipe of the fan. According to the fineness of the material, the output requirements, etc., it is generally open to the position. For the control valve located on the exhaust pipe of the exhaust gas outlet, it should be adjusted to the position where there is no powder spray at the inlet. In this way, the air volume is small and the fineness of the bentonite is high, but the air volume is not too small.

B. The second is the adjustment of the fineness of the equipment. The analyzer above the bentonite grinder should be adjusted according to the different fineness of the processing of the bentonite. When its speed is high, the fineness is also high. Of course, when the fineness is increased, the output will also be reduced, but it can meet the demand for finer granularity.

2. Replacement of grinding ring of grinding roller

Since this part is also the main part of the equipment, its replacement or scrapping will affect the performance of the complete bentonite grinder. It is generally believed that when the remaining minimum wall thickness of the grinding ring of the grinding roller is less than 10mm, it can be scrapped and replaced with new parts, so as to facilitate the production status of the equipment. At the same time, it is also forbidden to allow metal blocks to enter the machine, otherwise the grinding roller and grinding ring will be damaged.

Fodamon engineer once again reminded that only by doing a good job in the maintenance of the bentonite grinder can the application value of the grinder be brought into play to a greater extent under normal working conditions, and the fineness, output and efficiency can be improved, so as to lay a solid foundation for customers’ project profits.

In the iron ore beneficiation process, the current single gravity or magnetic separation process sometimes fails to produce qualified iron concentrate, especially the fine disseminated iron ore. The concentrate products obtained from gravity or magnetic separation are often subject to flotation treatment. The main flotation processes of iron ore include cationic reverse flotation and anionic positive flotation. In this paper, Fodamon engineers will mainly discuss the factors affecting iron ore flotation.

The floatability of different iron ores is quite different. For example, the floatability of magnetite is far worse than that of hematite, and the flotation reagents used for different types of iron ores are also different. In addition, the concentration will also affect the flotation of iron ores. Therefore, this paper selects three aspects as the analysis focus: iron ore type, flotation environment, and flotation reagents.

A. Impact of iron ore type

There are many and complex types of iron ores. At present, the industrial iron ores that can be used include: magnetite, hematite, magnetite, ilmenite, etc. Due to the large differences in the floatability of these iron ores, the selection of flotation type will be affected. Among iron ores, hematite, pseudohematite, limonite and siderite have good floatability. The coarse hematite is usually treated by reverse flotation, while the fine hematite can be treated by positive flotation.

The floatability of fake hematite is slightly worse than that of hematite, but both positive and negative flotation processes can be used to treat fake hematite. The floatability of siderite is similar to that of pseudohematite, and it is also a kind of ore that can be used in both positive and negative flotation. The reverse flotation effect of the two kinds of iron ores is better than that of the positive flotation. For magnetite with poor floatability, reverse flotation is generally used to flotation gangue minerals in iron concentrate, which can greatly reduce the impurity content in the concentrate.

Water-bearing iron oxide minerals are troublesome because they are hydrophilic, soft and easy to be slimed. The use process is different for different kinds of minerals, which depends on the nature of the ore itself.

B. Impact of iron ore flotation environment

The flotation environment here mainly refers to the change of PH value. Different iron ores have different requirements for PH value, and different PH will also affect the recovery rate.

Hematite and pseudohematite have strict requirements on the PH value. Too high or too low will cause the recovery rate to fluctuate. The appropriate PH value range of hematite is between 6.5 and 7.5, while the appropriate PH value range of pseudohematite is between 7 and 8. The selection of flotation process of siderite will change in different acid and alkali environments. In strong alkaline environments, siderite can choose cationic collectors for flotation, and in neutral media, anionic collectors can be used for collection.

C. Impact of iron ore flotation reagents

In terms of reagents, the commonly used flotation reagents for iron ore include cationic collectors, anionic collectors, inhibitors, etc. Among them, cationic collectors often use ether amine collectors to collect quartz and silicate in iron ores. Because of their relatively simple nature, low requirements on water quality and low temperature resistance, they are often used in flotation of iron ores. There are also many kinds of reagents, such as oxidized amine, coconut oil primary amine, soybean oil amine, etc.

The anionic collectors used to collect iron minerals include fatty acids, fatty acid soaps, sulfated soaps, etc. Relatively speaking, the selectivity is not as good as that of cationic collectors, and the requirements for PH value are relatively strict, and inhibitors are often used together to inhibit gangue minerals. When conducting anionic positive flotation, it is also necessary to select activator according to different ore properties. The common activator here is calcium oxide, which can make iron silicate minerals be flotation by organic acid. The commonly used inhibitor for iron ore is starch, and the specific use of the agent shall be determined according to the test after the ore property is proved.

The above are some influencing factors of iron ore flotation. In combination with the above analysis, we can find that due to the complex nature of iron ore, different ore types have different processing methods. In the actual application and production of each mine owner, it is also necessary to select the corresponding process flow according to the different properties of iron ore after the test is completed, according to the experimental results, to achieve a good recovery effect.