which methods to reduce heat consumption of vertical mill?

Vertical mill to reduce heat consumption increases the vertical mill production, reduce production costs, but how to reduce system heat consumption.

(1) control of the material and finished water

First of all, the sole purpose of heating is drying material, the moisture makes the finished product meets the national standard. From the perspective of the stability of the mill, the material moisture control in 8% to 10% of the best. Raw material is too dry, then the material flow becomes large, the bed is not easily stabilized, the need for additional water to stabilize the bed, if raw water is too large, blocking material is not only easy, but need to improve the mill inlet temperature, more energy . Finished moisture to meet customer requirements, based on minimizing the mill outlet temperature, can effectively reduce heat loss.

(2) reducing the water

Due to the highly liquid slag, grinding off than the required high specific surface area of cement raw material, it is necessary to reduce material on the disc mobility, the material on the disc extend the residence time, water can play a role in stabilizing the bed , the majority of domestic and slag vertical mill suppliers also require the use of water to stabilize the bed, slag vertical mill through continuous optimization of the mill structure. Reduce water dependence on the bed, can reach as little water, not even water.

(3) improve the operation rate

High operation rate can be improved not only in the total period of time, thus reducing the unit finished the heat consumption and heat losses can be avoided because of intermittent production brings. Heat rate batch production of the system considerably. Li mill stopped running for some time after you restart, you need to re-grinding mill, bake, sometimes the need for a short time Insulate furnace, which resulted in unnecessary loss of heat. Therefore, high operation rate can reduce the heat consumption of the system.

(4) the effective use of air circulation

Standard slag grinding process heating pipeline include: hot air pipes, air ducts and cold air circulating supplementary valve. Wherein the circulating air is a gas with a temperature of the fan outlet re-introduced into the mill, generally circulating air temperature about 70 ℃ ~ 90 ℃, air volume circulating air can reach about 50% into the mill air flow, if bake the ability to dry enough, then. Should be possible to use the wind circulation, this can reduce heat consumption.

(5) the full combustion of fuel

Whether gas stove or boiling furnace, hot stove as a heat source, the entire process equipment selection system must meet the technical requirements, especially for the amount of wind, wind speed and air pressure requirements. Hot stove while in use, the need to adjust the sound atmosphere than coal or wind than to be able to ensure adequate fuel combustion, thus preventing the waste of fuel.