Beneficiation method for cu-pb-zn polymetallic ores

Abstract

The invention discloses a beneficiation method for cu-pb-zn polymetallic ores, and belongs to the technical field of non-ferrous metal beneficiation. According to the technical scheme, the characteristic of complex cu-pb-zn-sulfur polymetallic ores with embedded fine-grained carbon level is utilized, a technological process of carbon-removing, cu-pb partial bulk flotation, cu-pb separation and zn-and-sulfur choosing in tailings is adopted, a concentration and fine grinding mode is adopted to achieve deep reagent removal, the influence of slurry on flotation is effectively eliminated, efficient collectors A8 and depressors T721 for cu-pb separation are used in the cu-pb partial bulk flotation process, separation and recovery of copper, lead, zinc and sulfur are effectively achieved, and concentrate mixing is obviously lowered.

Description

technical field [0001] The invention belongs to the technical field of non-ferrous metal beneficiation, and relates to a beneficiation method of copper-lead-zinc polymetallic ore. Background technique [0002] Copper-lead-zinc complex sulfide ore, due to the dense symbiosis of several metals, the fine particle size intercalated with each other, it is very difficult to sort; the treatment of this kind of ore at home and abroad is generally to grind the ore to the required fineness, and obtain copper, lead and zinc through flotation. Mix the concentrate, and then separate the copper, lead and zinc minerals; the main disadvantage of this process is that after the copper, lead and zinc minerals are mixed and flotation, it is difficult to remove the drug and the separation effect is poor. [0003] There are three main beneficiation methods for separating copper, lead, and zinc from copper-lead-zinc mixed concentrate. One is the heating method, which means that various chemicals o...

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Problems solved by technology

[0002] Copper-lead-zinc complex sulfide ore, due to the dense symbiosis of several metals, the fine particle size intercalated with each other, it is very difficult to sort; the treatment of this kind of ore at home and abroad is generally to grind the ore to the required fineness, and obtain copper, lead and zinc through flotation. Mix the concentrate, and then separate the copper, lead and zinc minerals; the main disadvantage of this process is that after the copper, lead and zinc minerals undergo mixed flotation, it is difficult to remove the drug and the separation effect is poor

[0003] There are three main beneficiation methods for separating copper, lead, and zinc from copper-lead-zinc mixed concentrate. One is the heating method, which means that various chemicals on the surface of the mineral are desorbed by heating, resulting in differences in mineral buoyancy to achieve separation. Purpose: This method is to use steam to heat the copper-lead mixed concentrate to about 60°C. In the acidic or neutral slurry, the collector on the surface of the galena is desorbed, and the surface is oxidized and hydrophilic, while the chalcopyrite It still floats up to realize the separation of copper and lead; the second is to use cyanide to suppress copper and float lead to achieve the purpose of separation, but cyanide has a strong inhibitory effect on chalcopyrite, and galena has almost no inhibitory effect. Using this method can Suppress copper and float lead, and get better results; the third is the method of adding organic salts, that is, using starch, baked gum, dextrin, etc., to inhibit the flotation of copper minerals in galena; but the methods listed above have common The problem is that the separation effect of various metal minerals is not good, the metal recovery rate is low, and the mutual content of each concentrate is high, resulting in unqualified copper, lead, and zinc concentrate products. Some methods are poisonous agents and pollute the environment, and some methods High energy consumption, high production cost, difficult to control the production process, not suitable for large-scale promotion

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