The material moves forward in pulsation, and the gangue is discharged to the discharge room through the gate at the end of the gangue section. The clean coal and middling coal of the coal washer flow into the second section (middling coal section) with the pulsating water to continue layering. At this time, middling coal is distributed at the bottom, and moves to the end and discharges to the discharge room of the medium coal seam through the gate, while the clean coal distributed at the upper layer overflows from the discharge end of the machine body. In this way, the raw coal is divided into three products: gangue, middling coal and clean coal.

　　A water medium jig is a machine that achieves the separation of light and heavy materials through the vertical pulsating motion of water. The air valve of the coal washing machine sends air into and out of the air chamber of the jigger at the selected frequency, causing the water medium in the jigger to form up and down pulsating motion. The raw coal fed into the * * * section (gangue section) of the machine body from the feeding section is layered on the sieve plate according to density under the action of pulsating water flow, and the high-density gangue gradually sinks.

　　Precautions for using drum coal washing machine:

　　1、 Metal and other foreign objects are strictly prohibited from entering the cyclone of the coal washing machine to prevent accidental damage to the cyclone.

　　2、 Regularly inspect the wear and tear of incoming materials and product exports, and replace them on time to ensure the sorting effect.

　　3、 When dealing with blockages and replacing components, the flange can be opened for repair or replacement. Avoid heavy hammering to avoid damaging the wear-resistant lining.

　　4、 During operation, the inlet of raw materials and the outlet of products should be checked regularly. If blockages or other abnormalities are found, they should be dealt with in a timely manner.

　　Troubleshooting and maintenance of drum coal washing machine

　　1. Carefully check whether all connections are secure and whether all components are in good condition anytime and anywhere. If any abnormal situations are found, notify maintenance personnel in a timely manner for maintenance.

　　2. Regular inspections should be carried out on parts such as the pull plate trolley, sprocket chain, bearings, piston rods, etc. to keep all matching components clean and ensure flexible movement. The synchronization of the pull plate trolley and the suspension of the chain should be adjusted in a timely manner.

　　3. Regular insulation and reliability tests should be conducted on the electronic control system. If poor accuracy and inflexibility of actions caused by electrical components are found, they should be repaired or replaced in a timely manner.