With the continuous consumption of energy, energy shortage is already a problem in front of the world, energy saving and consumption reduction is a good way to deal with the shortage of resources. As far as the ball mill is concerned, it is the main energy consumption equipment of mineral processing enterprises, and controlling the energy consumption of the ball mill is equivalent to saving the production cost of the entire mining enterprise. Here are 5 factors affecting the energy consumption of the ball mill, which can be described as the key to energy saving of the ball mill.
1, the impact of the starting mode of the ball mill is a large grinding equipment, this equipment at the start of the moment the impact on the power grid is very large, power consumption is also great. In the early days, the starting mode of the ball mill is usually auto-buck starting, and the starting current can reach 67 times the rated current of the motor. At present, the starting mode of the ball mill is mostly soft starting, but the starting current has also reached 4 to 5 times the rated current of the click, and the current impact caused by these starting modes to the transformer grid is too large, making the voltage fluctuation increase. Xinhai ball mill added frequency conversion control cabinet, the use of winding motor time frequency sensitive starting cabinet or liquid resistance starting cabinet, to achieve voltage reduction starting, reduce the impact on the power grid, the motor current and torque changes when starting., the impact of processing capacity Hourly processing capacity is an important parameter to measure the processing capacity of a ball mill, and it is also an important indicator that affects the power consumption of a ball mill. For a ball mill with a certain rated power, its power consumption is basically unchanged in the unit time, but the more ore processed in the unit time, the lower its unit power consumption. Defined overflow type ball mill processing capacity is Q (tons), power consumption is W(degrees), then a ton of ore power consumption is i=W/Q. For the production enterprise, the smaller the ton of ore power consumption i, the more beneficial to cost control and energy saving and consumption reduction, according to the formula, in order to make i smaller, can only try to increase Q, that is, to improve the hourly processing capacity of the ball mill is the most effective and direct way to reduce the power consumption of the ball mill.
3, the influence of the grinding medium Steel ball is the main grinding medium of the ball mill, the filling rate, size, shape and hardness of the steel ball will affect the power consumption of the ball mill. Steel ball filling rate: if the mill is filled with too many steel balls, the central part of the steel ball can only creep, can not do effective work, and, the more steel balls installed, the heavier the weight of the ball mill, will inevitably cause higher power consumption, but the filling rate is too low for the processing capacity, therefore, the steel ball filling rate should be controlled at 40~50%. The size, shape and hardness of the steel ball: although they will not have a direct impact on the energy consumption of the mill, they will have an indirect impact, because the size, shape, hardness and other factors of the steel ball will affect the efficiency of the mill. Therefore, it is necessary to choose the appropriate size of the steel ball according to the demand, the steel ball whose shape becomes irregular after use should be abandoned as soon as possible, and the hardness of the steel ball should also meet the qualification standard.
4, the impact of the amount of sand return In the closed circuit grinding process, qualified materials into the next process, unqualified materials returned to the mill for re-grinding, return to the mill and re-grinding this part of the material is the amount of sand return (also known as cycle load). In the grinding process, the greater the cycle load, the lower the working efficiency of the mill, the smaller its processing capacity, and therefore the greater the energy consumption.
5, the impact of the hardness of the material on the energy consumption of the mill is self-evident, the greater the hardness of the material, the longer the grinding time required to get the target grade, on the contrary, the smaller the hardness of the material, the shorter the grinding time required to get the target grade. The length of grinding time determines the hourly processing capacity of the mill, so the hardness of the material will also affect the energy consumption of the mill. For the material on the same deposit, the change in hardness should be small, so the impact of material hardness on the energy consumption of the ball mill is relatively small, and the energy consumption fluctuation caused by this factor is also relatively small in the production process for a long time.
Post time: Nov-08-2024