Beneficiation method for high-sulfur copper-zinc ore by using sodium humate

Abstract

The invention discloses a high-sulfur copper-zinc ore beneficiation method applying sodium humate, and relates to the technical field of beneficiation. Comprising the following steps that raw ore is crushed and ground, copper sulphide ore, zinc ore and pyrite are subjected to full monomer dissociation, and an ore pulp pH regulator lime and a pyrite inhibitor sodium humate are added during ore grinding; roughing concentrate and roughing tailings are obtained through primary roughing, primary scavenging is carried out on the roughing tailings, primary concentration, secondary concentration and tertiary concentration are carried out on the roughing concentrate, and scavenged middlings and concentrated middlings return in sequence to form a closed-loop process. The method solves the problems that in a conventional beneficiation method in current production, a large amount of lime is added to inhibit other sulfide ores under the high-alkali condition, the effect is not ideal, the copper concentrate copper grade is low, and the copper recovery rate is low; the problems that butyl xanthate is adopted as a high-sulfur collecting agent containing a small amount of zinc-copper ore, the collecting force is high, the selectivity is poor, the copper-zinc-sulfur separation difficulty is increased, and the consumption of inhibitor lime is increased are solved.

Description

technical field [0001] The invention relates to the technical field of beneficiation, in particular to a beneficiation method for high-sulfur copper-zinc ore using sodium humate. Background technique [0002] At present, the beneficiation and production of high-sulfur and a small amount of zinc-copper ore in China generally adopts lime slurries. Under the condition of high alkalinity, sulfide ore collector xanthate and foaming agent pine alcohol oil are added to separate and flotate copper, zinc and sulfur. Due to the low zinc content, it has no value for recovery, but it is enriched in the copper concentrate to affect the improvement of the grade of the copper concentrate, and is removed as an impurity of the copper concentrate. However, this process method has the following problems: (1) Under the condition of high alkali (pH>10), copper and zinc minerals will be inhibited to a certain extent, resulting in low recovery rates of copper and zinc. Under the premise of mon...

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Problems solved by technology

[0002] At present, the beneficiation of high-sulfur ore containing a small amount of zinc-copper ore in China generally adopts lime slurrying, and under the condition of high alkalinity, adding sulfide ore collector xanthate and foaming agent pine alcohol oil for separation and flotation of copper, zinc and sulfur. Due to the low zinc content, there is no value recovery, but the enrichment in copper concentrate affects the improvement of copper concentrate grade, and it is removed as copper concentrate impurities

But this process method has the following problems: (1) copper and zinc minerals will be inhibited to a certain extent under high alkali (pH>10) conditions, resulting in low recovery rates of copper and zinc

[0004] For the uneven particle size distribution of chalcopyrite in some ores, the intercalation relationship between some chalcopyrite and other sulfide ores and gangues is complicated. The target mineral recovered from the ore is chalcopyrite, and the sulfide minerals that need to be suppressed are mainly pyrite. , pyrrhotite, and sphalerite, these minerals are difficult to be completely suppressed by lime, and lime alone is used as the inhibitor because the inhibitory effect is not ideal, and the high impurity content of the concentrate leads to low grade copper concentrate

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