Method for floating high-grade sulfur concentrate from lead-zinc tailings by flow separation and speed division method

A high-grade sulphur concentrate and sulphur concentrate technology, applied in flotation, solid separation and other directions, can solve the problems of adding large collectors, long flotation process, and large energy consumption in beneficiation, so as to improve the beneficiation index and reduce The effect of beneficiation cost, improving sulfur recovery rate index and concentrate grade index

Inactive Publication Date: 2012-08-08
南京银茂铅锌矿业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In such a flotation process, when the raw ore sulfur is high, on the one hand, due to the short activation time, it is easy to cause more sulfur tailings, and at the same time, a large amount of collectors and activators need to be added; on the other hand, the flotation process It is longer, and multiple flotation machines are needed to ensure sufficient flotation time, and the energy consumption of beneficiation is large

Method used

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  • Method for floating high-grade sulfur concentrate from lead-zinc tailings by flow separation and speed division method
  • Method for floating high-grade sulfur concentrate from lead-zinc tailings by flow separation and speed division method
  • Method for floating high-grade sulfur concentrate from lead-zinc tailings by flow separation and speed division method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Embodiment 1 (control sulfur concentrate grade is equivalent)

[0012] according to figure 1 , figure 2 In the process shown, the dressing plant can process 1,300 tons of raw ore dry ore per day, and 50 tons of lead-zinc tailings dry ore per hour.

[0013] The grades of sulfur concentrate obtained by controlling the two processes according to the following process are equivalent.

[0014] Conventional sulfur selection process ( figure 1 ): add sulfuric acid, butyl xanthate and 2# oil to the zinc-selected tailings with a concentration of 30% (the sulfur grade is 31.26%), and use a flotation machine to float the sulfur concentrate. The addition amount of 93% sulfuric acid is 10200g / t (the pH value of the pulp is 6.8), the addition amount of butyl xanthate is 590g / t, and the addition amount of 2# oil is 5g / t; The concentrated overflow water is reused for sulfur selection. The test results are shown in Table 1, and the grade of the obtained sulfur concentrate is 46.68...

Embodiment 2

[0021] Embodiment 2 (control sulfur concentrate recovery rate is quite)

[0022] according to figure 1 , figure 2 In the process shown, the dressing plant can process 1,300 tons of raw ore dry ore per day, and 50 tons of lead-zinc tailings dry ore per hour.

[0023] The recovery rate of sulfur concentrate obtained by controlling the two processes according to the following process is equivalent.

[0024] Conventional sulfur selection process ( figure 1 ): add sulfuric acid, butyl xanthate and 2# oil to the zinc-selected tailings with a concentration of 30% (the sulfur grade is 31.26%), and use a flotation machine to float the sulfur concentrate. The addition amount of 93% sulfuric acid is 9800g / t (the pH value of the pulp is 7.0), the addition amount of butyl xanthate is 660g / t, and the addition amount of 2# oil is 8g / t; the concentration and dehydration of sulfur concentrate and sulfur tailings The concentrated overflow water is reused for sulfur selection. The test res...

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Abstract

The invention discloses a method for floating high-grade sulfur concentrate from lead-zinc tailings by a flow separation and speed separation method. According to the invention, the flow diversion and speed division method is adopted for carrying out the flotation on iron pyrite according to floatability difference characteristics of the iron pyrite in the lead-zinc tailings so as to obtain high-grade sulfur concentrate; and the problem can be solved that since the concentrate is high in mass, serious sulfur tail deviation is caused, and the recovering rate is low, and the characteristics of saving beneficiation reagent and being low in power consumption for beneficiation are realized. The method comprises the steps of concentrating the lead-zinc flotation tailings, and carrying out the flotation by the flow separation and the speed division method as per the following steps of a, fast flotation: adding sulfuric acid, sodium n-butylxanthate and oil II into the concentrated lead-zinc flotation tailings to float sulfur concentrate, wherein the yield of the sulfur concentrate accounts for more than 70% of the total sulfur concentrate; b. carrying out flotation on tailings after the fast flotation: adding sulfuric acid, sodium n-butylxanthate and oil II into the tailings after the flotation to float sulfur concentrate, wherein the yield of the sulfur concentrate accounts for a range within 30% of the total sulfur concentrate; and finally combing, concentrating and dewatering the sulfur concentrate obtained from step a and the sulfur concentrate obtained from the step b so as to obtain the required mixed sulfur concentrate.

Description

technical field [0001] The invention relates to a beneficiation method for flotation high-grade sulfur concentrate, and is particularly suitable for the beneficiation of pyrite in lead-zinc flotation tailings, and also applicable to the beneficiation of other polymetallic associated pyrites. Background technique [0002] At present, lead-zinc sulfide ore polymetallic mines at home and abroad mainly adopt the preferential flotation method. When reclaiming pyrite from lead-zinc flotation tailings, sulfuric acid is often used as the regulator and activator of sulfur selection. Sulfur concentrate products are selected. In such a flotation process, when the raw ore sulfur is high, on the one hand, due to the short activation time, it is easy to cause more sulfur tailings, and at the same time, a large amount of collectors and activators need to be added; on the other hand, the flotation process It is longer, and multiple flotation machines are needed to ensure sufficient flotati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D1/012B03B1/04B03D103/02
Inventor 缪建成马斌刘亚龙胡继华陈如凤范寻
Owner 南京银茂铅锌矿业有限公司
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