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Low-alkali separation method for high-sulfur copper-zinc ore

A separation method and technology for copper-zinc ore, applied in the direction of solid separation, flotation, etc., can solve the problems of poor quality of concentrate products, increased production costs, running grooves, etc.

Inactive Publication Date: 2020-10-20
厦门紫金矿冶技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this process solves the problem of copper-zinc separation to a certain extent, it has some disadvantages.
[0004] (1) When selecting copper, lime is used to adjust the pH>12, and a combination of zinc sulfate and sodium sulfite is added to inhibit zinc-sulfur minerals. Not only does the dosage of the agent be large, but also the fine mineral particles are agglomerated due to a large amount of lime, making the foam sticky and even " "running out of the groove", resulting in problems such as poor quality of concentrate products, high inter-containment, and low recovery rate
[0005] (2) High-alkaline floating copper is used in copper selection, resulting in the need to add a large amount of zinc activator during the zinc selection cycle, which increases production costs
[0006] (3) At the same time, high alkali conditions are not conducive to the recovery of associated precious metals
[0007] In view of the defects of the high-sulfur copper-zinc ore high-alkali copper-zinc separation process and the problem of low recovery rate of associated precious metals, it is of great practical significance to research and develop a high-sulfur copper-zinc ore low-alkali separation method with good separation effect and environmentally friendly process

Method used

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  • Low-alkali separation method for high-sulfur copper-zinc ore
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  • Low-alkali separation method for high-sulfur copper-zinc ore

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Embodiment 1

[0029] figure 1 Be the method flowchart of the present embodiment, wherein have: 1-calcium oxide dry powder; 2-sodium metabisulfite dry powder; 3-copper efficient collector.

[0030] A kind of low-alkali separation method of high-sulfur copper-zinc ore provided by the present embodiment, such as figure 1 shown, including the following steps:

[0031] S1. Raw ore grinding: Put the raw ore and water into the mill for grinding at a mass ratio of 5:3, add calcium oxide dry powder in the mill, adjust the pH value of the pulp to 7.5-8; grind to the final product Parts with a fineness of -75μm account for 80-85% of the total mass;

[0032] S2. Copper roughing: put the grinding product obtained in step S1 into the flotation machine, add calcium oxide dry powder in the flotation machine, adjust the pH value of the pulp to 9-9.5, and stir for 3 minutes; then add zinc inhibitor solids in sequence Sodium pyrosulfite powder and high-efficiency copper collector are stirred for 3 minutes ...

Embodiment 2

[0038]Mineral raw materials: The raw ore of a foreign high-sulfur copper-zinc polymetallic mine is taken. The ore contains 1.55% Cu, 4.70% Zn, 1.02g / t Au, 42.34g / t Ag, and 45.67% S by mass percentage. The main useful minerals of raw ore are chalcopyrite and sphalerite, other sulfides are mainly pyrite, and the content of pyrite is as high as 85.01%. The original production process mainly has problems such as poor copper-zinc separation effect and poor pyrite inhibition effect. Adopt the process described in embodiment 1 to process this ore, concrete steps comprise:

[0039] S1. Raw ore grinding: Put the raw ore and water into the mill for grinding according to the mass ratio of 5:3, add calcium oxide dry powder in the mill, and the dosage is 1000g / t per ton of raw ore, and adjust the pulp The pH value is up to 8; after grinding, the part of the grinding product with a fineness of -75μm accounts for 80% of the total mass;

[0040] S2. Copper roughing: put the grinding product ...

Embodiment 3

[0048] The raw ore used in this example differs from the raw ore in Example 2 in that it contains 1.28% Cu, 3.99% Zn, 0.5g / t Au, 43.13g / t Ag, and 42.53% S by mass percentage.

[0049] Adopt the process described in embodiment 1 to process this ore, concrete steps comprise:

[0050] S1. Raw ore grinding: put the raw ore and water into the mill for grinding at a mass ratio of 5:3, add calcium oxide dry powder into the mill, and adjust the pH value of the pulp to 7.5; after grinding, the ground product The part with a fineness of -75μm accounts for 85% of the total mass;

[0051] S2. Copper roughing: feed the grinding product obtained in step S1 into the flotation machine, first add calcium oxide dry powder in the flotation machine, stir for 3 minutes, and adjust the pH value of the slurry to 9.5; then zinc inhibitor solid sodium metabisulfite Powder and high-efficiency copper collector are stirred for 3 minutes and 2 minutes respectively to obtain copper rough concentrate and c...

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Abstract

The invention discloses a low-alkali separation method for high-sulfur copper-zinc ore. The low-alkali separation method comprises the following steps: grinding of raw ore; copper roughing, wherein dry calcium oxide powder, a zinc inhibitor, namely solid sodium pyrosulfite powder and an efficient copper collecting agent are added in the process of copper roughing, and rough copper concentrate andcopper roughing tailings are obtained; multi-stage copper scavenging, wherein the dry calcium oxide powder, the zinc inhibitor solid sodium metabisulfite powder and the efficient copper collecting agent are added in each stage of scavenging operation; regrinding of the rough copper concentrate; and copper concentration, wherein the reground rough copper concentrate is subjected to multi-section concentration operation, and the dry calcium oxide powder and the zinc inhibitor solid sodium metabisulfite powder are added in each section of concentration operation. The method can overcome the defects of existing high-alkali copper-zinc separation processes for the high-sulfur copper-zinc ore and solve the problem of low recovery rate of associated noble metals.

Description

technical field [0001] The invention relates to the technical field of mineral processing, and relates to a low-alkali separation method of high-sulfur copper-zinc ore. Background technique [0002] my country is rich in copper-zinc ore resources, many of which are high-sulfur copper-zinc sulfide ores. This type of ore has a complex structure, the sulfur content in the ore is as high as 40%, and the sulfides of copper, zinc and iron are often densely symbiotic, and the embedded relationship between the sulfides is complicated, which is difficult to dissociate and separate. [0003] The difficulty of separating copper, zinc and sulfur has always been one of the difficult issues in the processing technology of high-sulfur copper-zinc ore. At present, a lot of copper-zinc-sulfur priority flotation processes are used. When selecting copper, lime is often used to adjust the pH>12 to inhibit pyrite from floating up, and a combination of zinc sulfate and sodium sulfite is added...

Claims

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Application Information

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IPC IPC(8): B03D1/014B03D1/002B03D101/02B03D101/06B03D103/02
CPCB03D1/002B03D1/014B03D2201/02B03D2201/06B03D2203/02
Inventor 赵汝全王兢魏转花梁治安鲁军吴维新缪彦黄雄崔立凤
Owner 厦门紫金矿冶技术有限公司
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