In the cement production process, raw mill grinding process is a raw material complex process, many factors, such as the mill's structure, process, grinding media grading and material characteristics of its own. Main raw material for production of raw materials when the open-air pile of limestone, so the raw material production greatly influenced by the weather.
Winter conditions, low temperatures, the temperature will lower raw material into the mill, which is produced by grinding larger temperature difference between the temperature. As the snow big, raw materials, water content, high temperature mill, the raw material into a heated water vapor along with the powder adhere to the grinding media and liner, cushioning or blocking the formation of diaphragm plate of the grate holes, obstruction material flow, the grinding efficiency, this phenomenon is usually referred to as "full grind." General solution to this phenomenon is only the most common way to drop material warehouse, which not only sets at lower yields, while the ball consumption, power consumption increases.
As the raw material moisture, water big, raw material within the screw conveyor is running slow, reduce the transmission capacity of the screw conveyor, while the content is easy to form the spiral hanging to help feed, wear large leaves spiral, helical axis heresy, which resulted in spiral transmission operation is low. As the raw water, low temperature, exhaust gas moisture is also large, easy to gas condensation in the pipe, causing pipe blockage, and often stop grinding process, the mill operating rate.
After Liming Heavy Industry's engineering and technical personnel in-depth study, we have finally found the best way to solve this problem: the creation of a raw material grinding stove, in actual operation, into the ground temperature of 389 degree heat, As can be expected to solve the wet saturated ground caused by the phenomenon, and Taiwan increased over the previous year when the output of 3 tons of mill waste gas temperature can reach 90 degrees, emissions into the air at a temperature between 54 degrees above the dew point temperature, eliminating the pipe condensation. As an additional stove, grinding mill not only play a role, but play a role in drying, moisture less than 1% of the raw material, screw conveyor operation rate also increased, which makes the raw material grinding system operation rate over the same period increased by 5%.
