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Bulk concentrate flotation separation method based on reinforcement of lead sulfide inhibition

A technology of mixing concentrates and separation methods, applied in flotation, solid separation, etc., can solve the problem of failure to completely realize the effective separation of copper, lead or lead and zinc, difficulty in changing the surface floatability difference of copper and lead minerals, and the surface of lead sulfide Weak inhibitory effect and other problems, to achieve the effect of low cost, strong pertinence, and thorough effect

Inactive Publication Date: 2019-01-18
KUNMING UNIV OF SCI & TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there are many research results, the above-mentioned conventional agents have weak inhibitory effect on the surface of lead sulfide, and most of them are difficult to change the floatability difference on the surface of copper-lead minerals
The separation method of lead and zinc is mainly to suppress zinc and levitate lead. Inorganic inhibitors such as zinc sulfate, sodium sulfite, sulfurous acid and cyanide are mostly used. However, when the content of pyrite in the ore is high, or zinc sulfide is activated by copper ions and lead ions in the pulp Finally, the above-mentioned agents and methods are often difficult to inhibit zinc sulfide, and the separation effect of lead and zinc becomes poor.
Due to the above various factors, most of the beneficiation technologies adopted at this stage have failed to completely realize the effective separation of copper, lead or lead-zinc

Method used

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  • Bulk concentrate flotation separation method based on reinforcement of lead sulfide inhibition

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: as figure 1 As shown, a mixed concentrate flotation separation method based on enhanced inhibition of lead sulfide, the mixed concentrate is a fine-grained copper-lead sulfide mixed concentrate, in this mixed concentrate, the particle size is less than 400 mesh by mass, accounting for 95%, of which Containing Cu13.92wt%, Pb15.35wt%, the main copper mineral is copper sulfide (40.03wt%), the main lead mineral is lead sulfide (17.16wt%), and the remaining gangue minerals are small, mainly quartz, calcite and kaolinite Mainly, the specific steps are as follows:

[0027] (1) Wet pretreatment of mixed concentrate: place the copper-lead sulfide mixed concentrate in a stirring tank, add sulfuric acid solution with a mass concentration of 20% and manganese dioxide to the copper-lead sulfide mixed concentrate to adjust to The pulp concentration is 30%, wherein the mass ratio of the added manganese dioxide mass to the mixed concentrate is 1:100g, the pulp is heated ...

Embodiment 2

[0032] Embodiment 2: A kind of mixed concentrate flotation separation method based on strengthening and suppressing lead sulfide, the mixed concentrate is a fine-grained copper-lead sulfide mixed concentrate, and in this mixed concentrate, the particle size is less than 400 mesh by mass and accounts for 90%. It contains Cu14.56wt%, Pb16.37wt%, the main copper mineral is copper sulfide (41.70wt%), the lead mineral is lead sulfide (18.05wt%), and the rest of the gangue minerals are a small amount of quartz, kaolinite and serpentine Mainly. Specific steps are as follows:

[0033](1) Wet pretreatment of mixed concentrate: place the copper-lead sulfide mixed concentrate in a stirring tank, add sulfuric acid solution and ammonium persulfate with a mass concentration of 25% to the copper-lead sulfide mixed concentrate, adjust Until the pulp concentration is 35%, the mass ratio of the added ammonium persulfate to the mixed concentrate is 2g:100g, the pulp is heated to 85°C, the stirr...

Embodiment 3

[0039] Embodiment 3: A kind of mixed concentrate flotation separation method based on strengthening and suppressing lead sulfide, the mixed concentrate is a fine-grained copper-lead-zinc sulfide mixed concentrate, and in this mixed concentrate, the particle size is less than 400 mesh by mass and accounts for 85% , which contains Cu16.24wt%, Pb25.71wt%, Zn7.51wt%, the main copper mineral is copper sulfide (45.94wt%), the lead mineral is lead sulfide (29.02 wt%), the main zinc mineral is zinc sulfide (11.05 wt%) and the rest of the gangue minerals are mainly a small amount of quartz and carbonate. Specific steps are as follows:

[0040] (1) Wet pretreatment of mixed concentrate: place the copper-lead-zinc sulfide mixed concentrate in a stirring tank, add sulfuric acid solution with a mass concentration of 30% to the copper-lead-zinc sulfidized mixed concentrate, and adjust to a slurry The concentration is 35%, the pulp is heated to 95°C, the stirring speed is 500r / min, and the ...

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Abstract

The invention discloses a bulk concentrate flotation separation method based on reinforcement of lead sulfide inhibition. Firstly, wet process pretreatment is conducted on the bulk concentrate, the inhibition to lead sulfide in the bulk concentrate is selectively reinforced, then sulfuric acid or a mixture of the sulfuric acid and manganese dioxide and a mixture of sulfuric acid and ammonium persulfate is added, filtration is performed after heating and stirring, filtrate can be recycled, a filter cake is washed till pH is close to the neutral, then water is added for size mixing, then terpenic oil is used as a foaming agent, and the flotation separation is performed by adopting the flotation process of rough flotation, fine flotation and re-flotation of middlings. The method based on theprocess of separating lead and other ingredients in vulcanized bulk concentrate has the advantages that the steps complement each other's advantages, agent preparation is simple, copper-lead or lead-zinc separation is thorough, the cost is low and the recovery rate is high, is applied to copper-lead, lead-zinc or copper-lead-zinc bulk concentrates, achieves economic and efficient copper-lead and lead-zinc separation of copper-lead or lead-zinc vulcanized bulk concentrates, remarkably improves the utilization rate of copper, lead and zinc resources and is good in effect.

Description

technical field [0001] The invention relates to a mixed concentrate flotation separation method based on enhanced inhibition of lead sulfide, which belongs to the field of mineral processing engineering. Background technique [0002] There are a large number of copper-lead-zinc polymetallic sulfide ore resources in China. Copper minerals and lead minerals, lead minerals and zinc minerals are often densely symbiotic, and the mosaic relationship is complex and changeable. In the beneficiation and enrichment process of this type of ore, it is often necessary to sufficiently finely grind the copper, lead, and zinc mineral monomers to dissociate, and then carry out flotation enrichment and separation of copper, lead minerals or lead, zinc minerals. In the flotation process, due to the small surface differences of copper, zinc sulfide ore and lead sulfide ore, it is difficult to separate copper and lead, and it is difficult to separate lead and zinc, and more metals are mixed with...

Claims

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Application Information

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IPC IPC(8): B03D1/02B03B1/00B03B1/04B03D1/008B03D1/002B03D103/02B03D101/04B03D101/06
CPCB03B1/00B03B1/04B03D1/002B03D1/008B03D1/025B03D2203/02B03D2201/06B03D2201/04
Inventor 谢海云高利坤戴惠新田小松肖炜施金龙和继圣周清良赵英良陈登辉杜建武孙茂林
Owner KUNMING UNIV OF SCI & TECH
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