Ball mill is an important process in the mineral processing equipment for crushing the material after the implementation of crushing. One of the petrol station system is the "heart", maintaining a direct impact on the work efficiency of the machine. The following let Zhengzhou Xinhai Machinery Manufacturing Co., Ltd. for everyone to introduce how to improve the ball mill system of petrol stations, high-pressure pumps and heat exchangers. 1, the improvement of the thin oil station control system Ball mill original dilute gas station is by testing the pressure of the pump to control its working condition. The station is equipped with three pressure gauges, namely pump pressure, filter pressure, oil pressure. Supply pressure by the electric contact pressure gauge test, the general control at between 0.2 ~ 0.4MPa. When the oil supply pressure is lower than 0.2MPa, two oil pumps supply oil at the same time; when the oil supply pressure is greater than 0.4MPa, stop one oil pump and supply oil by one oil pump. Due to the size of the traffic directly reflects the working status of the petrol station. Pressure changes can only indirectly reflect the flow changes, and the pressure does not increase when the flow increases, so the control flow is the most direct and effective. Especially in the winter because of downtime and running temperature changes, each time the ball mill to start adjusting the valve so that the oil pressure reaches 0.2 ~ 0.4MPa, but as the running time of the lubricating oil temperature is also growing, the viscosity continues to decline, The pressure is also reduced. If this time failed to adjust the valve to increase pipeline resistance, it will be due to low oil pressure caused by thin oil station alarm stop grinding. In order to achieve effective control, we installed a outlet flow meter with two electrical contacts at the outlet of the fuel supply pipe to control the two electrical contacts, respectively, set the upper and lower limit. The original pressure electrical contacts only as a pressure display, no longer involved in the control. This work status of the petrol station directly reflects the size of the lubricant flow, very stable and reliable. No similar failure occurred within 1 year after the renovation. It should be noted that the choice of red flow meter, be sure to choose high reliability products, red plate rotation to be flexible, in any position can not be stuck phenomenon. 2, the transformation of high-pressure pump Ball mill are generally used "static pressure start, dynamic pressure lubrication" approach. In the dry ball mill before the start by the high-pressure pump to the hollow shaft and bearing pump between the pump some oil, forming a film between the shaft and tile, reducing the starting resistance. After a few minutes of operation of the ball mill, the high-pressure pump stops working. At this time the lubricant relies on the rotation of the ball mill to form a "dynamic pressure lubrication." As the high-pressure pump is intermittent work, there is always lubricating oil in the pipeline between the pump outlet and the bearing. By winter temperatures are very low, the viscosity of the oil in these lines can be very large and the resistance is greater. High-pressure pump caused when the pressure is too high, often overload, frequent relief valve action caused by failure. When the relief valve is damaged, sometimes direct pressure relief but the oil supply pressure is too low can not overcome the weight of the mill resistance, oil can not enter the bearing; sometimes not caused by the overflow pressure pump damage. In view of Ruiguang machine used in high pressure pump 2.5MZB ball mill rarely fails, and this pump anti-overload ability. To this end we use a 2.5MZB high-pressure pump, the high pressure pump rated working pressure increased from 31.5MPa to 40MPa. And in the oil pump exports to the bearing pipe winding electric mixing tropical, even in winter can make the pipe temperature reaches 30 ℃, greatly reducing the viscosity of the oil. After the transformation of high-pressure pump rarely fails. 3, heat exchanger improvements Heat exchanger is to protect the ball mill in the summer safe operation of the important facilities. The original heat exchangers are tube heat exchanger. This heat exchanger bulky, inefficient, cleaning the scale is very difficult, once the leakage repair more difficult. We use the plate heat exchanger instead of the original tube heat exchanger, to overcome the shortcomings of the tube heat exchanger. And according to the actual actual operating conditions, in some places appropriate to increase the heat transfer area. Such as mill tail dilute gas station than the mill thin oil station heat exchanger area increased 2m2, because the grinding tail thin oil station in addition to the need to take the heat generated by the bearing friction, but also take away the ball mill material through the hollow shaft conduction part Heat.