Reselection recovery method and device for gold

Abstract

The invention discloses a reselection recovery method for gold. The method comprises the following steps that primary ore grinding is carried out on raw ore, ore pulp generated after ore grinding is sorted by a jigging machine, magnetic separation is carried out on jigged concentrates, and jigged tailings enter a classifier; the magnetic concentrates are selected finely to obtain iron ore concentrates, the magnetic tailings enter a table concentrator, and concentrates of the table concentrator are adopted as alloy gold; classification and machine overflowing are carried out on middlings and tailings of the table concentrator, the middlings and the tailings enter the cyclone, and coarse particles return to a first-stage ball grinder to be ground again; the cyclone carries out overflowing, the floatation operation is executed, secondary ore grinding is carried out on cinnabar, and materials obtained after ore grinding enter a Nelson concentrating machine; floatation is carried out on tailings of the Nelson concentrating machine, and concentrates begin to be jigged; the jigged concentrates enter the table concentrator, and jigged tailings return to the cyclone to be classified; the concentrates and the tailings are obtained through flotation. According to the reselection recovery method for the gold, the reselection recovery rate is improved by 22.11 percent, and the total recovery rate of ore dressing is improved by 2.69 percent.

Description

technical field [0001] The invention relates to the technical field of gold beneficiation, in particular to a gold gravity recovery method and a device thereof. Background technique [0002] Flotation theory and research in recent years have mainly focused on the electrochemical theory of sulfide ore flotation, the solution chemistry theory of oxidized ore and salt mineral flotation, the theory of polymer flocculation and hydrophobic agglomeration in fine particle flotation, and the theory of column flotation, etc. On the one hand, because the flotation properties of gold minerals and sulfide minerals, especially copper sulfide minerals, are very similar, the flotation theory of sulfide ores also has a guiding and reference role for gold ore flotation. Flotation has more direct application value. The development of electrochemical theory has produced a new application field, slurry electrochemistry, which can realize collector-free flotation by controlling the slurry potent...

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Problems solved by technology

[0004] Previously, the material after a period of grinding enters the jig machine, the jigging concentrate enters the shaking table, the shaking table concentrate is smelted into alloy gold, the ore tailings in the shaking table enter the cyclone; the jigging tailings enter the Classifier, the overflow of the classifier enters the cyclone, and the coarse grain enters the first stage of grinding; the overflow of the cyclone enters the flotation operation, and the cinnabar returns to the second stage mill for regrinding; flotation obtains gold concentrate and tailings. The beneficiation operation is an open circuit, and the part that has not been separated after re-election needs to be re-grinded, which increases the grinding cost and affects the subsequent flotation indicators

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