The content of gold in the ore is very low, in order to extract the gold, you need to crush and grind ore and adopt mineral processing method for pre-enrichment or separating gold from ore,re-election and floatation method is used in gold mining, re-election method in placer gold production occupies an important position, the flotation method is widely used in rock gold mining .At the present, about 80% of rock gold mining in our country adopt this method, mining technology and equipment level has been more greatly improved.

Re-election in the rock gold mine is used widely, more as a secondary process, in the grinding circuit to recover coarse gold, to creat favorable conditions for flotation and oxidation process ,to improve the mineral index, increased the total recovery of gold, play a positive role on increasing production and reducing the cost t. In Shanghai, more than 10 with gold plants use the re-election process, the average total recovery can be increased by 2% to 3%, good economic efficiency of enterprises, according to incomplete statistics, the annual profit of several million dollars is available. Viewing from most of the gold mines, re-floating a joint process (flotation tailings re-election) is suitable for use in the future, we should vigorously promote the stage grinding stage sorting process, this can be advocated, as early as the principle of closing the dressing

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dryer: http://www.hxjq-crusher.com/21.html