There are two methods for cleaning coal washing equipment. One is gravity separation and flotation. Gravity separation is mainly divided into+0.5mm coal, which is separated by different densities of coal and minerals. Flotation mainly separates -0.5mm coal, which is separated by the different surface hydrophilicity and hydrophobicity of coal and minerals. Regardless of which method is used, it is to improve utilization efficiency and reduce transportation costs. After all, a complete set of coal washing equipment is a large machine, and everyone should work safely and reasonably avoid risks

　　When the coal selection equipment is in operation, it is forbidden to use the method of scraping and rolling to adjust the deviation, and it is forbidden to clean the coal stored on the coal washing machine frame and drum. When cleaning the support roller, machine head, and tail drum, it is necessary to strictly follow the rules and regulations, remember to cut off power and hang tags to prevent dangerous accidents from being started without knowledge. It is strictly prohibited for anyone to sit, stand, walk, lie, cross on the conveyor belt of the belt conveyor, nor to stand on the frame to sweep water, shovel coal, or touch the conveyor belt, because some dangers always occur unintentionally. Don't be afraid of ten thousand, just be afraid of the unexpected; Every factory is not allowed to use belt conveyors for handling tools or other objects. Only by correctly protecting the coal washing machine from violating equipment safety regulations can normal and efficient production be achieved, and thus the interests of the manufacturer can be gradually improved.

　　The coal preparation equipment shall screen and crush the raw coal. The raw coal with proper particle size can separate the coal from gangue and mineral impurities, divide it into different products, such as clean coal, middling coal and gangue, and then dehydrate, concentrate, filter, filter press and dry it. The coal separator will finally collect the selected products into different products. It seems simple. As a major coal province, Shandong is a big coal province, and coal is mined in tons every day. After being processed by the coal preparation equipment, it will be sent to all parts of the country. The workload is still very large. So everyone must avoid risks, go to work safely, and leave happily.