Yesterday, it was already the winter solstice. Did you eat dumplings? However, when washing coal in winter, the coal is easy to freeze, and there are many ways to prevent the coal from freezing in the coal washer. Among them, antifreeze has developed rapidly, and the use of antifreeze has partially solved the freezing problem of coal transportation in winter. And how should we take specific anti freezing measures?

　　1、 The cylindrical silo and the air cannon cleaning method have a certain degree of anti freezing effect on coal, and the addition of a superior cannon cleaning device can solve the problem of material freezing inside the cylindrical silo. The air cannon clearing device uses compressed air (with a pressure of 0.8 MPa) to pass through a quick acting nozzle and generate a dynamic impact force of 37000-220000 N within a few minutes of a second, causing the frozen block to crack and thus play an anti freezing role. If a solid-state degree controller is used, blasting or freezing can be effectively carried out within a predetermined distance and time.

　　2、 Coal pile vibration coal discharge method

　　Install a vibration device directly at the discharge port below the coal pile of the coal washing machine, causing coal to collapse and continuously flow out during the freezing period. Due to the periodic vibration of the vibration device, the coal in the coal pile flows downwards, and only a few seconds of vibration per minute can achieve the effect of loosening and clumping. The detailed method is to set up a coal discharge hole with a diameter of about 2 meters on the surface of the coal yard, and install a heavy-duty steel ring on it. Two 1.5kW vibration motors are used to generate 360000 N vibration force on the steel ring. The steel ring transmits the vibration force to the coal, causing the coal to collapse and be discharged onto the conveyor through the coal discharge device.

　　3、 Hammer vibration method

　　Hammer vibration method is an anti freezing method that uses two vibration hammers with a length of 4m to insert into the coal body of the car body (50-100 ton car body can be used), because the vibration of the hammer forces the frozen coal blocks to loosen and separate. Using a crane to operate the vibrator, the upper, lower, and side walls of the vehicle can be fully crushed by the vibrator to break the frozen blocks.

　　Tips for preventing coal freezing in coal washer

　　4、 Salt antifreeze method

　　Place the device for spraying CaCl2: solution above the surface or coal storage pile, and spray with 32% CaCl2: solution to achieve strong anti freezing effect. Experiments have confirmed that CaCl2 can dissolve ice at tE-19.4 ℃. When the temperature is around -10 ° C, CaCl24-5 kg is required to dissolve l t frozen coal.

　　5、 Coal truck thawing warehouse

　　The thawing warehouse is equipped with a heater, which releases strong radioactive infrared radiation energy. Through a polished reflector, the strong radiation energy is directed to both sides and bottom of the frozen coal seam, allowing it to be unloaded after thawing.

　　To sum up, it is a small skill of coal freezing in the coal washer, which can be used as a reference. Looking at the recent weather, Jiaozuo will experience the coldest weather next week. Everyone must remember to do a good job in antifreeze to avoid affecting later production.