Golden mine can say in numerous metal ore is a kind of ore with higher value ratio, the treatment abstraction that passes pair of gold mine achieve abstract the heavy metal such as gold the purpose that come out respectively, of course gold is main end result. Is the abstraction process of gold after all what kind of? A lot of people are very curious to this, expert of installation of SBM machine mineral separation uncovers flow of secret gold mineral separation today.
Gold is in the content in ore is extremely low actually, to extract gold, need undertakes ore broken use preelection of mineral separation method, rich collect to wait to come out gold from the depart in ore with mill. Gold mineral separation uses more method is reelect and floatation. Reelect law holds very significant position in arenaceous gold production, and floatation law is the relatively commonly used mineral separation method in cliff gold mine.
One, broken with grind mine
The first situation that after golden mine comes out from the exploitation in mine, has is broken, broken later undertake farther pink grind exercise again. The factory selecting gold of our country uses gnathic type crusher to undertake more thick conic crusher has broken, standard type in broken, short head dummy is conic crusher or undertake to roller type crusher finely. And broken mine flow also is divided for two paragraphs of one closed circuit and flow of broken mine of 3 paragraphs of one closed circuit, among them large the factory that select gold chooses broken mine of 3 paragraphs of one closed circuit, and medium, small-sized the factory that select gold uses technological process of broken mine of two paragraphs of one closed circuit.
SBM machine understands, our country makes an appointment with the cliff gold mine of 80% to use floatation law to undertake golden mine mineral separation, yielding concentrate sends toward coloured smeltery to undertake further processing more. Have normally preferential floatation and mixture floatation two kinds of craft.
Seize the 40 many mills of countrywide that select gold, findings of floatation technology index makes clear, vulcanization mine floatation reclaims rate for 90% , a few is as high as 95% ～ 97% ; Oxidation mine reclaims rate for 75% the left and right sides; Achieve 80% ～ individually 85% . In recent years, the innovation of floatation technological process is transformed and scientific research achievement is very much, the effect is apparent. Level wears float circuit, heavy — float combines flow to wait, it is the main trend that at present craft of our country floatation develops.
In last few years, to rise grading the effect, while craft is improved ceaselessly, add to drug system and mixed to also make many improvement with formulary face with research, in the implementation that add drug automata respect also has new progress.
Of course, floatation law and other method are not all-purpose euqally, cannot effective to all ore that contain gold, basically consider ore quality even, when choosing technological process, need to have the argumentation of many sided and test.
Reelect is compared in application of arenaceous gold mine extensive, serve as auxiliary craft more, thick bead gold reclaims in wearing mine return circuit, create advantage for floatation and cyaniding craft, improve mineral separation index, raise golden over all recovery, to increasing crop is mixed reduced cost to produce positive effect.
Use reelect craft to undertake gold mineral separation, average over all recovery can raise 2% ～ 3% , business economic benefits is good. The main device that reelect craft uses has chute, table, jigger and short awl to come back stream implement etc. From our country majority gold mine looks, float — combines technological process again (floatation gangue uses reelect) comfortable at using, will popularize level to grind mine phase to choose energetically henceforth fasten flow, advocate can close, the mineral separation principle that accepts early.
Unfinished to be continued.
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