Mitsubishi Metal Corporation copper zinc ore, and gangue minerals in the metal conductivity - also large differences in magnetic, sorted on a sorting machine M19 type. Good indicators have also been obtained, and the results are shown in Table 15. Third, the economic benefits of the election ε sorting -----the recovery rate of the ore after the original ore is selected, and the decimal number. AC hydraulic power units are also widely used in different industries. Here are some examples: Ac Hydraulic Power Unit,Ac Hydraulic Power Pack,Ac Hydraulic Power Pump,Ac Hydraulic Power System Huaian Yansheng Hydraulic Machinery Co., Ltd. , https://www.yshydraulics.com
Although there are many advantages in picking, it is not a necessary operation. Whether a mine adopts picking operations requires specific technical and economic analysis to determine whether there is obvious squeeze efficiency.
In order to evaluate the economic benefits of picking, it is first necessary to conduct a sortability test of ore, based on process indicators and specific mine conditions. Here are two ways to calculate economic benefits.
(1) Calculating the saved ore processing fee For the same amount of ore, two methods are used: one is to directly enter the plant selection operation (re-election, flotation, etc.); the other is to first pick (such as photoelectric sorting, etc.) After discarding part of the waste rock, the selected coarse concentrate and the unselected fine ore are combined into the beneficiation operation (re-election, flotation, etc.). The processing costs of the two treatment methods are then compared. If the picking method is used, the ore processing fee can be saved, and the net profit indicates that the picking has economic benefits. [next]
Part of the waste rock is discarded by the sorting operation, which saves the transportation cost and the processing cost of the part of the waste rock. In order to calculate the net ore processing fee after the picking, the processing fee required for the picking operation needs to be subtracted from the total cost saved. If the total recovery rate is reduced after the sorting operation, the cost of this part of the metal (or useful element) is also subtracted. The metal (or useful element) loss cost is often small because the picking operation increases the ore grade and the recovery rate is directly proportional to the ore grade. After subtracting the picking fee and metal loss from the saved processing fee, the value obtained is the net processing fee A saved by the picking operation. The larger the value, the more significant the economic benefit of picking. Its calculation formula is as follows. [next]
The first item in formula (1) is the cost of mineral processing and transportation, the second is the processing fee used for the selection, and the third is the cost of metal loss.
It can be seen from the above formula that in order to make the picking have obvious economic benefits, the yield of tailings to be sorted is required to be large, the recovery rate of concentrates is high, and the processing fee for picking is low. For the high cost of processing operations, the long distance transport Concentrator ([alpha] and [alpha] is selected from op values are large), the need is even more obvious chosen.
In the specific calculation, the indicator obtained by the picking test is substituted into the formula (1), and the value A of the net processing fee for picking and saving is obtained, and the returning period is calculated by comparing with the investment amount of the construction picking workshop. The shorter the return period, the greater the need to build a workshop.
(2) Calculating the increased output value For a concentrating plant whose processing capacity has been determined, the ore is selected before the ore enters the concentrating plant, which will increase the grade of the ore selected by the concentrator, thereby increasing the amount of metal produced by the concentrator and increasing the output value. .
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