At this stage, when adding steel balls to the mill, manpower must first load the required number of steel balls into the ball adding funnel. The automatic ball adding machine is lifted from the crane to the 2nd floor platform, and the steel balls are poured into the ball adding port at one time. To complete the addition of steel balls.
The method of manually adding balls mainly has the following shortcomings:
(1) The uncertainty of the recoverable reserves of the automatic ball adding machine due to production and processing needs is very large, and the daily processing capacity changes greatly. The highest can reach 2500T\/D, and the lowest can reach 1500T\/D. When the mining reserves change, the manual ball-adding method will be difficult to add balls according to the ball consumption ratio specified in the processing technology. There may also be cases where the ball consumption ratio specified in the processing technology cannot be reached, which affects the grinding efficiency or exceeds the ball consumption ratio. Consumption of steel balls. Taking the main grinding as an example: the amount of steel balls added every day is 135 (4.04Kg\/piece, total: 545.4Kg), and the total number of balls added in 3 shifts is 1636.2Kg. The ball consumption ratio according to the process standard is 0.76Kg\/ T is calculated: when the processing capacity reaches 2500T\/D, the amount of steel balls should be increased to: 1900Kg. When the processing capacity is 1500T\/D, the amount of steel balls should be increased to: 1140Kg. It can be obtained that when the processing capacity is higher than the process During design, insufficient usage of steel balls will result in reduced grinding efficiency. When the processing capacity is less than the process design, excessive usage of steel balls will cause consumption of steel balls.
(2) There is no accurate data basis for manual ball addition, and there is no accurate statistics on the current steel ball consumption. It is possible to add less and more.
(3) It is difficult for manpower to add steel balls on time, which will lead to a reduction in the grinding efficiency or consumption of steel balls at this stage. Take the main grinding of a system as an example:
Example 1: At 8 o'clock in the morning, the amount of steel balls for the current team is added to the mill at one time. The next shift should add steel balls to the mill again at 16 o'clock to ensure the grinding efficiency of the mill. However, due to other constraints As a result, the 16 o'clock team adds steel balls one hour or even more than two hours late, so the grinding efficiency will decrease during the vacant time here.
Example 2: The automatic ball adding machine adds the amount of steel balls for the current team into the mill at 11 o'clock at noon, and the next shift adds the amount of steel balls for the current team into the mill at 16 o'clock. It is not difficult to see the two teams. The interval between two ball additions is 5 hours. Based on the ball consumption ratio, the two teams are in a state of repeatedly adding balls for 3 hours, which in turn results in steel ball consumption.
