Fodamon engineers continue to share six other operation skills to improve production capacity of cone crusher.
1. Minimize the stagnation of the buffer silo, improve the efficiency of the production line
As the “enemy of output”, the buffer bin of cone crusher and other related equipment also need to be carefully arranged.
It is recommended that the rational use of buffer bins or hoppers and variable-speed feeding devices (conveyor belts, plate-type vibrating feeders) can enable the operating operator to maintain the cone broken “full cavity” for a long time, and easily increase the cone bankruptcy by 10%.
2. Accurately grasp the three upper design limits of cone crusher
The cone crusher has three design upper limits: the upper limit of throughput (capacity), the upper limit of power and the upper limit of crushing force.
The upper limit of cone crusher capacity refers to the maximum passing capacity of the crusher. A cone crusher running in “full chamber” has reached the maximum passing capacity, and if it exceeds the limit, it will overflow the feed port; when the feeding material increases and the material is broken finer, the actual power of the crusher will rise; the same as the power, the crushing force generated between the bowl shaped tiles and the crushing wall of the cone crusher will also follow When the crushing force exceeds the upper limit, the adjusting ring will bounce and loosen.
When the crusher operates at the maximum throughput, the actual power and crushing rate are still slightly lower than the upper limit. Running in a state beyond the upper limit of rated power and crushing force will cause overload and permanent fatigue damage of cone crusher, which is irreversible and will continue to accumulate, and ultimately shorten the service life of cone crusher.
3. Ensure operation within the upper limit of the crusher design
If the cone crusher operation exceeds the upper limit of crushing force (adjusting ring runout) or exceeds the rated power, you can:
a. Slightly increase the tight side discharge port parameters and try to ensure “full cavity” operation. The advantage of “full cavity” operation is that there will be a stone-rocking process in the crushing cavity, which can keep the product grain shape when the discharge port is slightly larger;
b. Or reduce the feed rate, but it may be difficult to ensure a good particle size.
Generally speaking, the problem of the adjustment ring runout or exceeding the rated power of the cone crusher is caused by material jamming, eccentric feeding, uneven feeding, too much fine material in the feeding, too much mud content, wrong use of the crushing wall and the bowl lining, or simply because the operation personnel set the tight edge discharge port of the cone crusher too small.
4. Monitor and try to ensure proper crusher speed
If the proper drive belt tension is not maintained, incorrect or driver maintenance is ignored, the belt will slip and the speed of crusher will drop during operation. The stone handling capacity of the crusher decreased sharply when the rotating speed decreased, while the power consumption increased sharply, the unit energy consumption increased, and the operation cost increased.
It is suggested that the speed monitoring device can be installed in the intermediate shaft and connected to PLC or alarm device directly. Once the speed drops, the maintenance personnel can be informed to adjust the belt, which can extend the belt life and ensure excellent production capacity and energy consumption.
5. Control the fine material content in the feed
Fine material in the feed: the material that enters the crusher’s stone and has a particle size equal to or less than that set at the tight-side discharge port. According to experience, for the two-stage cone crusher, the fine material content in the feed should not exceed 25%; for the three-stage cone crusher, the fine material content should not exceed 10%.
Excessive fines are usually caused by vibration screen problems. Insufficient screen hole diameter or insufficient screening capacity may cause this problem. Too much fines will cause problems such as insufficient power utilization and abnormal increase in unit energy consumption during crushing.
6. The feeding height should not be too high
For small and medium-sized cone crushers, the maximum suitable height of materials falling from the feeding equipment to the feeding port is Zero point nine About meters. If the feeding height is too high, the stone is easy to “rush” into the crushing chamber at high speed, causing impact load to the crusher, and the crushing force or power exceeds the upper limit of the design.
This problem will cause excessive pressure or tension on the crusher components, resulting in additional maintenance costs and low production.