Copper-molybdenum mixed concentrate sulfuric acid pretreatment separation flotation method

Abstract

The invention relates to a copper-molybdenum mixed concentrate sulfuric acid pretreatment separation flotation method. The method comprises the following steps that firstly, a copper-molybdenum mixedconcentrate is added with sulfuric acid under the condition of low pH value for pretreatment, then nitrogen filling and agent selection are conducted for floating separation, and one-time roughing, two-time scavenging and four-time concentration are conducted so as to obtain a copper concentrate and a molybdenum concentrate. The method has the advantages that stability is good, adaptability is high, agent consumption is small, separation cost is extremely low, and the method is particularly suitable for efficient separating and recovering of copper and molybdenum from the copper-molybdenum mixed concentrate.

Description

technical field [0001] The invention relates to a sulfuric acid pretreatment separation flotation method for copper-molybdenum mixed concentrate, which is especially suitable for efficient separation and recovery of copper and molybdenum from copper-molybdenum mixed concentrate. Background technique [0002] Under normal circumstances, there are two schemes for the separation of copper-molybdenum mixed concentrate: one is to suppress molybdenum and float copper, that is, to suppress molybdenite flotation copper sulfide ore, but because the grade of molybdenum in the mixed concentrate is very low, and molybdenite can float It is better than copper minerals, and the molybdenite is difficult to activate after being inhibited, so it is used in rare cases; the second is to suppress copper and float molybdenum, that is, to inhibit copper sulfide ore to flotation molybdenite. The main method of separation, copper inhibition and floating molybdenum, is usually used alone or in combi...

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Problems solved by technology

[0002] Under normal circumstances, there are two schemes for the separation of copper-molybdenum mixed concentrate: one is to suppress molybdenum and float copper, that is, to suppress molybdenite flotation copper sulfide ore, but because the grade of molybdenum in the mixed concentrate is very low, and molybdenite can float It is better than copper minerals, and the molybdenite is difficult to activate after being inhibited, so it is used in rare cases; the second is to suppress copper and float molybdenum, that is, to inhibit copper sulfide ore to flotation molybdenite. The main method of separation, copper inhibition and floating molybdenum, is usually used alone or in combination with the following agents, such as sodium cyanide, Knox, sodium sulfide, etc. Using sodium cyanide as an inhibitor is expensive and causes environmental pollution, etc. Insufficient, which limits its application in production, and Knox-type chemicals are mainly used to inhibit lead, to achieve the purpose of reducing lead content in molybdenum concentrates, but the drug consumption is fast, and it is easily oxidized by the oxygen in the pulp and loses inhibition Insufficient performance, sodium sulfide is currently the most widely used copper mineral inhibitor, but sodium sulfide has poor stability and large dosage, that is, a large amount of inhibitor is needed to inhibit copper sulfide ore, and copper and molybdenum are separated by sodium sulfide At the same time, the dosage must be at least 10kg / t (for ore), and sometimes even 50-70kg / t (for ore) to separate the copper-molybdenum mixed concentrate. Due to the high cost of chemicals, the loss of molybdenum selection leads to economic reasons. One of the reasons why molybdenum in copper-molybdenum ore cannot be recovered, which makes it difficult to separate copper and molybdenum and consumes a large amount of separation agents, is the residual agent in copper-molybdenum mixed concentrate. What technical means can be adopted to solve the problem of copper-molybdenum mixed concentrate? Residual medicament in, after searching, the inventor has not found the technical literature that solves this kind of problem

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