Pulverized coal is now the casting industry, building materials industry and thermal power plant demand for raw materials. In order to obtain high-quality pulverized coal, the market began to appear new grinding equipment - coal vertical mill. Professional for cement, power plants, steel mills and other fields of raw coal, bituminous coal materials, ultra-fine grinding.

Chaeng(Great Wall Machinery) has more than 50 years of grinding experience in vertical mill is at home and abroad with many cases. Chaeng Coal grinding for a number of drawbacks, produced by the coal mill has a unique structural features:

1, coal vertical mill with a disc-shaped disc and tire-shaped roller sets, more suitable for coal grinding.

2, roller bearings without special sealing. Roller device uses a pair of spherical roller bearings, bearing seal cavity extends to the case, not with dust-laden gas contact, so long as a simple seal can make roller bearings do not enter the dust, do not need sealed fan.

3, mill transmission part, do not need auxiliary transmission device.

4, slagging part of the simple. Coal vertical mill less slag, slagging mouth with a cover, do not need to install slag discharge valve.

 Chaeng for coal mill equipment operation and operation of the process may encounter problems for customers to answer:

1, excessive coal spill

A: This is a dangerous situation.

A large number of coal spill will block the pebble, the accumulation in the hot air chamber caused by the fire inside the hidden danger of ignition, and it will damage clean slag device, blocking the hot air into the grinding body.

2, vertical mill at the outlet temperature below the specified value under continuous operation

A: This is a dangerous condition.

Coal can not be fully dry in the case of vertical mill adsorption and coal powder in the tube, so that the coal powder pipe clogging or lead to vertical mill, pulverized coal fire.

3, vertical mill outlet temperature is higher than the specified value of the operating conditions

A: This is a dangerous condition.

The high outlet temperature drives the volatilization out of the coal, thus increasing the potential for ignition. Vertical mill outlet temperature of the provisions should be based on the characteristics of the coal itself.

4, vertical mill ventilation below the specified value under the conditions of operation.

A: This is a dangerous condition. This will lead to the pulverized coal inside the conveyor speed is too low Into the coal powder precipitation, which caused the coal powder pipe plugging fire.

5, vertical mill ventilation rate is higher than the specified value under the conditions of operation.

A: This is a poor condition. Excessive ventilation will accelerate the internal wear of pulverized coal and vertical mill and reduce the fineness of pulverized coal.

6, vertical mill output pulverized coal fineness is too fine.

A: This is a poor condition. The output of pulverized coal will make the output of vertical mill decrease, and the consumption of pulverized coal unit will be increased.

7, vertical mill output pulverized coal fineness is too coarse.

A: This is a poor condition. Pulverized coal too coarse will affect the combustion, the impact on other processes.

8, no load when the roller is not lifted in the state open grinding.

A: This is a dangerous situation. Grinding of the mill due to the use of high-chrome iron parts, easy to crack. In the case of no coal on the grinding ring running, will cause roller roll cover or liner cracking.

In line with all the customer-centric business principles, in order to ensure the smooth progress of the entire coal grinding project and the completion of the project, the Great Wall Machinery introduced the "1 vertical mill, 8 services" value-added program, from the initial project to the final Production, the Great Wall machinery to provide guidance throughout, praised by customers.