The vibrating screen works on a circular motion and is mainly used in industries such as coal dressing, metallurgy, mine, power station, water conservancy project, building industry, light industry, and chemical industry, among others. It is an efficient screening machine for classifying bulk materials such as coal, minerals, coke, etc. There are 40 different specifications available for the YZS Series, with the heavy-duty type designed for large size materials and the light-duty type for middle and small size materials.
The vibrating screen moves in a circular motion and has multiple layers, making it highly efficient. The eccentric shaft vibration exciter and partial block help to adjust the amplitude, and the material drops down along the long line. During screen grading, the material is mechanically separated on screen plates. The rolling bearings in vibrating screens are subjected to high, mostly shock-type loads. Additionally, while rotating about their own axis, the bearings perform a circular, elliptical, or linear vibrating motion, resulting in high radial accelerations that stress the bearings, especially the cages.
The operating speeds of vibrating screens are usually very high, which results in bearing temperatures up to 20 to 30 degrees Kelvin higher than in normal applications. Moreover, considerable misalignments between the bearing locations and shaft deflections have to be accommodated.
A vibrating feeder is a type of equipment that uses vibration to “feed” or transport materials from one process step to the next. Vibrating feeders can be used to transport bulk or granular materials from storage to crushers, conveyors, and other processing machines. They are used in industries such as mining, metallurgy, coal, construction, chemical, and food processing. The design of vibrating feeders is such that they are maintenance-free and perform reliably even under the most demanding conditions. They are designed to provide a uniform and continuous flow of materials, making the downstream equipment more efficient and effective.
The Vibrating Feeder is mainly used to feed material into the primary crusher homogeneously and continuously, while screening the material, making the crusher more efficient. Our Vibrating Feeders are proven performers and require no maintenance, making them the first choice for the most demanding applications, including public utilities, mining, metal production, food processing, cement, and other industries.
The working principle of a stone vibrating feeder is relatively simple. The vibrating feeder uses the eccentric mass in the vibrator to generate centrifugal force, so that the moving part of the equipment (the cone-shaped hopper) performs forced continuous circular or approximately elliptical motion. The materials in the hopper are thrown up and move forward in a straight line when the vibration frequency is the same as the natural frequency of the hopper. At the same time, the materials are screened through the sieve, and materials with particle sizes smaller than the gap of the sieve are discharged from the lower part of the sieve to achieve the purpose of feeding and screening materials. The vibrating feeder is widely used in mining, building materials, silicate, and chemical industries for crushing and screening equipment.
An impact crusher is a type of heavy equipment that uses a striking force to break materials into smaller pieces. It is typically used for crushing various types of ores, rocks, and other construction materials. The machine operates by feeding the material into a rotating rotor, which then accelerates the material and throws it against a stationary surface, causing it to break into smaller fragments. Impact crushers are commonly used in industries such as mining, quarrying, and recycling, and are often used to produce a final product with a specific size or shape. They come in various sizes and models, ranging from small machines that can be easily transported to larger machines that are used in large-scale operations.
Impact crusher is a new, highly efficient crushing equipment. Its characteristics include small volume, simple structure, large crushing ratio (up to 40), low energy consumption, large production capacity, uniform particle size, and selective crushing effect, making it a very promising device. However, its biggest drawback is that the board hammer and counterattack plate are particularly prone to wear, especially when crushing hard ore, leading to more serious wear, thus requiring frequent replacement. Currently, the emergence of a number of wear-resistant materials has been applied in some metallic ore concentration plants.
The crushing process of impact crushing machine starts with the material entering the counter-clockwise rotation of the rotor from the mine mouth through the chain curtain. The material then undergoes the second impact by the board hammer. Part of the material still flies to the first counter board at high speed, while another part of the material (mostly small) flies to the second counter board to be crushed. In this process, some material undergoes multiple rounds of crushing, and finally, the material that reaches the required particle size is discharged from the crushing machinery.
In the production line, impact crusher is often used as a secondary crushing equipment. It can crush various materials with a compressive strength of not more than 350MPa, such as coarse, medium, and fine materials such as granite, limestone, concrete, etc. The finished product has a uniform particle size and is suitable for the construction of various large, medium, and small projects. As a secondary crushing equipment, impact crusher is often used in conjunction with jaw crushers and other crushers in the production line, which can effectively improve the overall efficiency of the entire production line. Moreover, with the continuous development of technology, wear-resistant materials have been widely used in impact crusher production, effectively reducing the frequency of replacement of vulnerable parts and prolonging the service life of the equipment.
Looking for a reliable and efficient impact crusher? Look no further than our company. Our impact crushers have been designed and engineered to deliver superior performance and reliable operation, making them the ideal choice for a wide range of applications. Whether you need an impact crusher for your mining operation, aggregate production, or construction project, we have the right solution for you. Our experienced team is dedicated to providing exceptional customer service and support, so you can be confident in your investment. Contact us today to learn more about our impact crushers and how they can benefit your operation.
How to deal with a belly bulge in the ball mill? There are several factors to consider when a belly bulge appears during the operation of a ball mill:
Check whether the ball mill is spitting out material from the mine properly. Improper material discharge can lead to a bulging belly in the ball mill.
Listen to the sound of the ball mill. If there are small changes in the sound and it becomes stuffy, there is a high possibility of a bulging belly in the ball mill.
Look at the current value on the ball mill control cabinet. Some people may think that if the current value becomes larger, it is a precursor to the expansion of the ball mill belly. However, if the ball mill has a bulging belly, its current value will actually become smaller.
Ball Mill Operating principle
This ball mill is a horizontal and tubular running device with two warehouses. The machine is of grid type and its exterior runs along the gear. The material enters the first warehouse of the milling machine spirally and evenly through the input material hollow axis by the input material device. In this warehouse, there is a ladder scale board or ripple scale board, and steel balls of different specifications are installed on the scale board. When the barrel body rotates, it produces centrifugal force, and the steel ball is carried to some height and then falls to make the material grinding and striking. After coarse grinding in the first warehouse, the material enters the second warehouse for regrinding with the steel ball and scale board. Finally, the ball is discharged by the output material board, and the end product is completed.
Dry magnetic separator is suitable for magnetite, magnetic pyrite, roasted ore, ilmenite and other materials with a particle size of less than 3mm. It is also used for iron removal of coal, non-metallic ore, and building materials.
1. Thickness of the feed layer: it has a great relationship with the particle size of the raw material to be processed and the content of magnetic particles. The coarse feed layer is generally thicker than the fine particles. When processing coarse-grained ore, the thickness of the ore-feeding layer is about 1.5 times that of the largest particle. It can process about 4 times of the largest particle in the middle particle size, and up to 10 particles in the thickness of fine particle material. When the content of magnetic materials in the raw materials is not high, the feed layer should be thinner. If it is too thick, the magnetic particles in the lowermost layer are under the pressure of the upper layer material, and the magnetic force cannot be absorbed, causing the recovery rate to decrease. When the content of magnetic particles is high, the ore-feeding layer may be thicker.
2. Magnetic field strength and working clearance: it is closely related to the particle size, magnetic height and operation requirements of the processed materials. When the working clearance is fixed, the magnetic field strength between the poles is determined by the ampere turns of the coil, and the turns cannot be adjusted, so the magnetic field strength can only be adjusted by changing the magnitude of the exciting current. When dealing with the cleaning operations such as Hongzun with strong magnetism, the weak magnetic field should be used, and the materials with weak magnetism and the cleaning operations should be handled. The field strength should be higher. When the current is fixed, changing the size of the working gap can not only change the strength of the magnetic field, but also change the gradient of the magnetic field, so as to reduce the sharp increase of the gap magnetic force. Generally, the size of the treated particles should be minimized in order to increase the recovery rate. During cleaning, it is better to increase the gap to increase selectivity and grade, but at the same time, the magnetizing current should be increased properly to ensure the required magnetic field strength.
3. Feeding rate: The feeding rate is determined according to the speed of the vibration tank (or belt). Its speed determines the mechanical force of the time when the ore particles are stopped in the magnetic field. The greater the rate, the shorter the ore particles are stopped in the magnetic field. The mechanical forces received by the ore particles are mainly gravity and inertial knives. Constant, inertial force is proportional to the square of velocity. The magnetic force of the weak magnetic ore particles in the magnetic field surpasses the gravity, so the rate exceeds a certain limit. Because the inertial force increases, the absorbed magnetic force will be insufficient, causing the acceptance rate to drop. Therefore, when selecting weak magnetic minerals, it is advisable to adopt a feeding rate lower than that of strong magnetic minerals. As usual, when selecting, there are more monomer particles in the quality guess, and the magnetism is stronger. The feed rate can be increased. When scanning, the quality guess contains more contiguous bodies and the magnetism is weaker, which is an improvement. The acceptance rate should be lower for the mine rate; when disposing of fine particles, in order to facilitate the loosening of the ore particles, the frequency of the vibration tank should be higher and the amplitude is smaller; when disposing of coarse particles, the opposite is true. Appropriate operating conditions should be determined through implementation based on the ore nature and the requirements for sorting quality. When disposing of a large number of metal ores, the materials should be connected to dry and narrow grade ore feeding, which is conducive to the progress of the index. The experience shows that the more sieving grades of raw particles, the better the indicators.
Manganese resources in the world are mainly distributed in South Africa, the former Soviet Union, Australia, China and other countries. Apart from China, the world’s land manganese ore reserves are about 17.292 billion tons.
The main manganese minerals include soft manganese ore, hard manganese ore, black manganese ore, brown manganese ore, rhodochrosite and so on.
There are many classification methods of manganese ore, which can be divided into sedimentary type, metamorphic type and weathering type according to the genesis of the deposit; manganese ore and iron manganese ore according to the iron and manganese content of the ore. According to industrial use, it can be divided into metallurgical manganese ore and chemical manganese ore. In addition, according to the natural types and associated elements of minerals, they are divided into manganese carbonate ore, manganese oxide ore, mixed ore and polymetallic manganese ore.
Manganese carbonate ore exists in various forms of manganese carbonate minerals, and its content accounts for more than 85% of the manganese content in the ore. Manganese oxide ore exists in various forms of manganese oxide minerals, and its content accounts for more than 85% of the manganese content in the ore. The manganese present in the form of various manganese carbonate minerals or manganese oxide in the mixed manganese ore accounts for less than 85% of the manganese content in the ore.
Polymetallic manganese ore is different from the above three kinds of manganese ore, in addition to manganese, it also contains other metal and nonmetal minerals. There are many manganese carbonate mines in China, accounting for about 57% of the total manganese ore. At present, manganese ore beneficiation methods include gravity separation, heavy medium-strong magnetic separation, roasting-strong magnetic separation, single strong magnetic separation, flotation, and a combination of multiple methods.
Manganese minerals are weak magnetic minerals. The strong magnetic separation of manganese ore occupies an important position. A single magnetic separation process for manganese carbonate ore and manganese oxide ore with a relatively simple composition and coarse-grained particle size can obtain better separation indexes. When sorting manganese carbonate ore, the magnetic field strength of the magnetic separator must be above 480 kA / m, while the magnetic field strength of the magnetic separator for sorting manganese oxide ore is higher, generally above 960kA / m.
Magnetic separation of manganese oxide ore. Most of the manganese oxide ore belongs to the secondary ore of the weathering leaching deposit. It has a soft texture and contains more clay minerals. It is very easy to be muddled in the process of ore and transportation. The manganese-containing grade and improvement of crushing, screening, beneficiation and transportation conditions all need to be washed. Coarse particles (about 5 mm or more) are sorted by re-selection methods such as jig, and fine particles (about 5 mm or less) can be separated by strong magnetic separation.
Case 1, Miaoqian mining area of Liancheng Manganese Mine in Fujian Province is a weathering crust type manganese oxide deposit, which is divided into leaching type, Deluvial type and mixed type of leaching and Deluvial, mainly leaching type. The main metal minerals in the ore are hard manganese ore, pyrolusite, manganese soil and limonite, etc., gangue minerals are mainly quartz, followed by sericite, opal, barite, and other impurities are mainly loess, clay, etc.
The ore process includes ore washing, jigging and strong magnetic separation. After crushing to less than 70 mm, the ore shall be washed, sieved and graded first, + 30 mm shall be manually separated, 4.5-30 mm ore shall be re separated by am-30 jig, and – 4.5 mm particles shall be separated by qc-200 induction roller type high magnetic field magnetic separator. 35.68% of the products were selected with strong magnetic field, 41.23% of the concentrate grade and 93.6% of the recovery.
Magnetic separation of manganese carbonate ore. Manganese carbonate deposit, which belongs to marine sedimentary type, has large reserves and scale, and is an important resource for producing commercial manganese ore.
Case 1, The strong magnetic separation plant of Taojiang Manganese Mine in Hunan Province deals with Rhodochrosite and manganese calcite. After fine crushing, grinding and grading, 0.5-4 mm ore enters into cgde-210 strong magnetic separator for separation, 0-0.5 mm ore enters into SHP strong magnetic separator for separation, and the resulting concentrate is combined and sintered.
If you have manganese ore dressing needs. Please contact us, Fodamon engineer will give you the right solution according to your ore situation.
