Method to Control Roller Mill Operation

 Tai Copper Mining Company Jianshan iron ore is an important raw material base of TISCO. Processing ore mine design capacity is 4 million t / a, the ultimate products of iron concentrate long distance is 102.487 km pipeline into to too copper raw materials field. Smaller mine ore dissemination size is 0.02 -0.2 mm, the granularity of the process (monomer dissociation degree) to become the main factors restricting iron concentrate production and quality. In order to ensure the production and quality of the iron ore concentrate, in particular to ensure that the size requirements of the long-distance pipeline transportation of iron ore concentrate(but not ball mill ,impact crusher), the implementation of the automatic control of the production process of one, two stage grinding and classification. The ball mill during operation, when the ore filling rate is low, the high electric ear signal power is small; With the filling rate is increased, the electric ear signal is reduced, while the power consumption is increased; reaches a certain fill rate, continue to reduce electric ear, but power start decline.
Protection process is similar to the principle of the mill empty smashing protected with bulging belly. Only protect the ball mill does not occur bulging belly and empty-hit phenomenon, which can not be substantially improved mill handling capacity to to control overflow granularity to meet the requirements, you must also ensure that the ball mill is always running in the high grinding efficiency. System through comparative analysis and trend power, electric ear (fuzzy computing) to determine the nature of the ore, the ball charge and external circumstances. Ore appropriate uniform particle size, add ball can automatically adjust the handling capacity is higher than the conventional value automatic optimization to mine. Mill "bulging belly" the empty hit pretreatment Protection: Calibration by physical grinding point, "bulging belly" trend mill control process into the "bulging belly" pre-processing the protection part. Protection process: electric ear signal close to the critical point, indicating that the mill memory mine to the development of the tendency to increase too much or to mine coarsening or ore hardness, can be controlled the mine signal output to reduce or control to the mine to stop a period of time ( in exceptional circumstances), until electricity ear signal elevated, close to a given value and then reinstated to the amount of ore. Under normal circumstances, the original to the ore values ??allowed by the ball mill processing capability. The reason for the bulging belly is generally due to changes in ore nature.