Flotation method for reducing tin content of pyrite

A technology of pyrite and flotation, which is applied in flotation, solid separation, grain processing, etc., can solve the problem of high tin content in sulfur concentrate, and achieve the effects of low tin content, non-toxic and low price

Inactive Publication Date: 2019-04-12
广东省资源综合利用研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims at the problem that the sulfur concentrate contains too much tin in the desulfurization process of ...

Method used

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  • Flotation method for reducing tin content of pyrite
  • Flotation method for reducing tin content of pyrite
  • Flotation method for reducing tin content of pyrite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A certain lead-zinc flotation tailings contains sulfur and tin, and the ore contains 0.67% tin and 18.21% sulfur. figure 1 Shown technological process, concrete technological parameter is as follows:

[0033] Adjustment of tin-containing pyrite ore slurry: in the mixing equipment, the mass ratio of liquid to solid is 1.5:1 to stir and adjust the slurry, add sulfuric acid, the dosage is 1000g / t, the pH value is kept at 5-6, the collector butyl xanthate is 120g / t and Foaming agent methyl isobutyl carbinol 20g / t, then add cassiterite inhibitor hydroxyethyl cellulose and sodium hexametaphosphate mixed agent 500g / t. The mixing time is 10 minutes.

[0034] Flotation separation of sulfide ores and tin minerals: the technological process is one roughing and two sweeping. The obtained coarse ore concentrate is ground again, and after two rounds of beneficiation, the tin-containing low-sulfur concentrate is obtained.

[0035] The coarse concentrate products in the roughing ope...

Embodiment 2

[0045] The raw ore contains 1.21% tin and 12.43% sulfur. figure 1 Shown technological process, concrete technological parameter is as follows:

[0046] Adjustment of tin-containing pyrite ore slurry: in the mixing equipment, the mass ratio of liquid to solid is 1.5:1 to stir and adjust the slurry, add sulfuric acid, the dosage is 800g / t, the pH value is kept at 6, the collector butyl xanthate is 120g / t and foaming Methyl isobutyl carbinol 20g / t, then add cassiterite inhibitor hydroxyethyl cellulose and sodium hexametaphosphate mixed agent 400g / t. The mixing time is 10 minutes.

[0047] Flotation separation of sulfide ores and tin minerals: the technological process is one roughing and two sweeping. The obtained coarse ore concentrate is ground again, and after two rounds of beneficiation, the tin-containing low-sulfur concentrate is obtained.

[0048] The coarse concentrate products in the roughing operation are graded and then ground. The grinding equipment adopts a tower ...

Embodiment 3

[0059] The raw ore contains 2.78% tin and 21.45% sulfur. figure 1 Shown technological process, concrete technological parameter is as follows:

[0060] Adjustment of tin-containing pyrite ore slurry: in the mixing equipment, the mass ratio of liquid to solid is 1.5:1 to stir and adjust the slurry, add sulfuric acid, the dosage is 1000g / t, the pH value is kept at 5.5, the collector butyl xanthate is 150g / t and foaming Add 30g / t of methyl isobutyl carbinol, and then add cassiterite inhibitor hydroxyethyl cellulose and sodium hexametaphosphate mixed agent 500g / t. The mixing time is 10 minutes.

[0061] Flotation separation of sulfide ores and tin minerals: the technological process is one roughing and two sweeping. The obtained coarse ore concentrate is ground again, and after two rounds of beneficiation, the tin-containing low-sulfur concentrate is obtained.

[0062] The coarse concentrate products in the roughing operation are graded and then ground. The grinding equipment a...

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Abstract

The invention discloses a flotation method for reducing a tin content of a sulfur ore concentrate. The method comprises the following steps: performing ore pulp adjustment on preferential-flotation lead-zinc tailings, adding sulfuric acid into a stirring device, maintaining the pH value at 5-6, adding collecting agent butyl xanthate and foaming agent methyl isobutyl carbinol, adding cassiterite inhibitor hydroxyethyl cellulose and sodium hexametaphosphate according to a mass ratio of 1:1, performing rough selection for one time, performing scavenging for two times, performing re-grinding on arough ore concentrate product by a tower mill, performing classification by a cyclone to obtain a qualified product, and performing concentration for two times to obtain a pyrite product with a low tin content. The method provided by the invention has a simple production process, and the tin content of the sulfur ore concentrate is less than 0.12%, and the method facilitates recovery of tin minerals.

Description

technical field [0001] The invention belongs to the field of mineral flotation, in particular to a flotation method for reducing the tin content of pyrite. Background technique [0002] my country is rich in tin ore resources, and the reserves of cassiterite sulfide ore are relatively large. Most of the currently mined cassiterite sulfide ore is mainly pyrite (Fe 2 S), pyrrhotite (FeS) and arsenopyrite (FeAsS), before selecting tin minerals, pyrite minerals must be flotation clean, otherwise it will directly affect the recovery rate of tin, and the desulfurization effect will directly affect the subsequent tin recovery related work. Desulfurization generally uses a large amount of sulfuric acid to adjust the pH of the pulp, and the use of water glass and cassiterite, which will cause a series of problems. In an acidic environment, water glass and calcium ions in the pulp are prone to react, and it is easy to accumulate calcium and block. Pipelines corrode the surface of th...

Claims

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Application Information

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IPC IPC(8): B03D1/018B02C17/10B02C17/20B03D101/06B03D101/02B03D101/04B03D103/02
CPCB02C17/10B02C17/20B03D1/018B03D2201/02B03D2201/04B03D2201/06B03D2203/02
Inventor 何名飞高玉德卜浩孟庆波
Owner 广东省资源综合利用研究所
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