A kind of beneficiation method of high-carbon refractory lead-zinc ore

Abstract

The invention provides a beneficiation method for high-carbon refractory lead-zinc ore, and relates to the technical field of mineral processing, comprising: moving raw ore pulp into a flotation cell, adding a carbonaceous capture agent to the raw ore pulp to float carbon, lead, etc.; Heating the mixed concentrate obtained by floating operations such as carbon and lead, and heating the mixed concentrate to 65-75°C to separate the carbon concentrate and primary lead concentrate; adding pH adjuster to the tailings in the floatable step such as carbon and lead , so that the pH value of the tailings in the floatable steps such as carbon and lead is 10-11, and then the sphalerite inhibitor zinc sulfate, sodium sulfite, lead mineral collector ethyl sulfide and foaming agent are respectively added to obtain lead crude by flotation. Concentrate: After regrinding the lead rough concentrate, add a pH adjuster to make the lead rough concentrate pH 10-11, and add sodium sulfite to obtain secondary lead concentrate. The above-mentioned high-carbon refractory lead-zinc beneficiation method for flotation concentrate has low impurity content, and has the advantages of simple operation, stable process, strong adaptability and convenient on-site management.

Description

technical field [0001] The invention relates to the technical field of mineral processing, in particular to a beneficiation method for high-carbon refractory lead-zinc ore. Background technique [0002] How to eliminate the influence of carbon in the separation process of carbon-containing polymetallic sulfide ores has always been one of the difficult problems in mineral processing research at home and abroad. Due to the good buoyancy of carbon, it will float together with lead and zinc, and due to the dense symbiosis and inlaid between minerals, some lead-zinc ores have certain difficulties in the separation of lead and zinc, coupled with the interference of carbon. , will seriously affect the separation effect of lead-zinc ore. In view of the influence of carbonaceous gangue, two processes are usually used: one is pre-decarbonization, and then lead-zinc flotation is carried out. Another process is direct flotation without pre-decarburization. The advantage is that the or...

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Problems solved by technology

Due to the good floatability of carbon, it will float out together with lead and zinc, and because of the dense intergrowth and mutual mosaic of minerals, there are certain difficulties in the separation of lead and zinc in some lead-zinc ores, coupled with the interference of carbon , will seriously affect the sorting effect of lead-zinc ore

In view of the influence of carbonaceous gangue, two processes are usually used: one is pre-decarburization, followed by lead-zinc flotation. The advantage is that the flotation index is relatively stable, and the disadvantage is that it is easy to cause the loss of useful minerals and the metal recovery rate is low; The other process is direct flotation without pre-decarbonization. The advantage is that the ore with low carbon content has better indicators. The disadvantage is that the ore with high carbon content not only consumes a lot of chemicals, but also the flotation foam is unstable and the production Difficult to achieve stable operation on

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