Coal and Coal Slag Powder Grinding Treatment and Equipment Recommendations

Coal gangue is solid waste emitted during the drilling, mining, and coal washing processes. It is a low-carbon, harder-than-coal black-gray rock that coexists with coal during the coal formation process 

 With technological advancement, coal gangue is no longer discarded waste but a valuable resource that can be processed and utilized. The coal矸石 after grinding can be used to produce lightweight aggregates for cement and concrete, as well as refractory bricks and other construction materials. Among them, grinding coal gangue to a certain fineness can be used for calcining kaolin and other high-value products.

The Value and Market Demand of Coal Gangue Grinding Powder 

 Coal gangue, as an industrial waste product, has long been considered an environmental burden. In fact, coal gangue contains a variety of minerals: kaolite, quartz, montmorillonite, and green clay, among others. Kaolite is the main mineral, and after processing, it holds great economic value. 

 Coal gangue powder after reasonable grinding processing can be used to make coal gangue bricks, cement, lightweight aggregates, and other construction materials; after grinding, pulping, grading, and calcination, it can become ultra-fine calcined kaolin. It is widely used in plastics, aerospace, wires and cables, paints, cosmetics, etc. as a filler or extender. It can also be used as a raw material in ceramic industry and for producing heat-resistant high-temperature pottery.

Coal Slag Grinding Process Flow 

 Phase One: Shattering 

 Large coal gangue is crushed by the crusher to a fine enough size (15mm-50mm) to enter the grinding mill. 

 Second Stage: Grinding Powder 

 The small pieces of coal gangue after crushing are sent to the hopper by the elevator, and then evenly and quantitatively fed into the ball mill drum through a vibrating feeder for grinding. 

 Phase Three: Grading 

 The coal gangue powder after grinding is sorted by a grading machine. Materials that do not meet standards are returned to the ball mill for re-grinding. 

 Phase Four: Collecting Powder 

 Materials that meet the fineness criteria are carried by air flow through the pipeline into the dust collector for separation and collection. The collected finished materials are then sent to the finished product warehouse through the discharge port by the conveyor system.

Advantages of ball mills in coal gangue grinding 

 1. The ball mill is an ideal equipment choice for grinding coal gangue powder, suitable for large-scale production. 

 2. It has the advantages of high production capacity of a single machine, automated control, low investment cost, good environmental performance, and high quality of the finished product. 

 3. The ball mill has strong adaptability to fluctuations in material physical properties (such as particle size, moisture, hardness, etc.). 

 4. The unit product has low metal consumption, compact structure, stable operation, and easy maintenance. 

 5. The lining plate is made of high-quality Abrasion Resistant material, which is Abrasion Resistant and has a long service life. It has a large production capacity and high crushing ratio, making it adaptable to different operating conditions. 

 6. The product has fine granularity and uniform particle size. The particle size distribution is easy to adjust, with a high product pass rate. It has good sealing properties, low dust pollution, high grinding efficiency, and low energy consumption.