Beneficiation method of high-carbon refractory lead-zinc ore

Abstract

The invention provides a beneficiation method of high-carbon refractory lead-zinc ore, and relates to the technical field of mineral processing. Thebeneficiation method comprises the following steps:transferring raw ore pulp into a flotation tank, and adding a carbonaceous trapping agent into the raw ore pulp to carry out floatability of carbon, lead and the like; heating bulk concentrates obtained by floatable operation such as carbon and lead, heating the bulk concentrates to 65-75 DEG C, and separating to obtain carbon concentrates and primary lead concentrates; adding a pH regulator intotailings of floatable steps such as carbon and lead to enable the pH value of the tailings of floatable steps such as carbon and lead to be 10-11, then respectively adding sphalerite inhibitors such as zinc sulfate and sodium sulfite, a lead mineral collecting agent such as dithio-N and a foaming agent, and carrying out flotation to obtain lead rough concentrate; and grinding the lead rough concentrate again, then adding a pH regulator is added, wherein the pH value of the lead rough concentrate is made to be 10-11, sodium sulfite is added, and secondary lead concentrate is obtained. The beneficiation method for the high-carbon refractory lead-zinc ore is low in impurity rate of flotation concentrate, and has the advantages of being easy to operate, stable in process, high in adaptability,convenient to manage on site and the like.

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 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 i...

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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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