Dressing and smelting combination method for copper-zinc sulfide ores difficult to treat

A technology for combining beneficiation and smelting and sulfide ore, applied in the field of beneficiation and smelting, can solve the problems of difficult separation of copper-zinc sulfide ore, difficulty in industrialization implementation, large discharge of three wastes, etc., achieves good prospects for industrial promotion and application, and simplifies the flotation process. , Improve the effect of recycling indicators

Inactive Publication Date: 2018-03-16
KUNMING UNIV OF SCI & TECH
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Problems solved by technology

[0004] The purpose of the present invention is to provide a combined dressing and smelting method for refractory copper-zinc sulfide ores, which is mainly aimed at the difficulty in sorting copper-zinc sulfide ores, the traditional dressing and smelting method has long process flow, high cost, large discharge of three wastes, and difficulties in industrialization implementation, etc. question

Method used

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  • Dressing and smelting combination method for copper-zinc sulfide ores difficult to treat

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1: a kind of dressing and smelting combined method of refractory copper-zinc sulfide ore, concrete operation is as follows:

[0029] A refractory copper-zinc sulfide ore ore, the mass percentage of its chemical composition is: Cu 0.5%, Zn 4%, S 6%, Fe 10.5%, the content of valuable element Au is 0.5 g / t, the ore is crushed 1. After ore grinding treatment, 65% of the material with a particle size of less than 74 μm in mass is obtained, and then copper-zinc mixed concentrate is obtained through copper-zinc mixed flotation, and its chemical composition is mainly: Cu 5.5%, Zn24.6%, S 31.5 %, Fe 21.5%, SiO 2 6.85%, the content of the valuable element Au is 4.5g / t, the mixed concentrate is stacked in the silo, and the concentrate with a water content of 10% is obtained after natural air drying.

[0030] Roast the concentrate with a water content of 10% at 850°C for 3 hours to obtain zinc calcine with a sulfur content of 0.8% and a water content of 0.45%. Mix coke...

Embodiment 2

[0033] Embodiment 2: a kind of dressing and smelting combined method of refractory copper-zinc sulfide ore, concrete operation is as follows:

[0034] A refractory copper-zinc sulfide ore, the mass percentage of its chemical composition is: Cu: 0.7%, Zn: 5.5%, S: 8.2%, Pb: 0.25%, Fe: 14%, the content of valuable element Au is 0.7% g / t, after the ore is crushed and ground, the material with a particle size of less than 74μm in terms of mass is obtained, accounting for 60% of the material, and then copper-zinc mixed concentrate is obtained through copper-zinc mixed flotation, and its chemical composition is mainly: Cu: 7.2%, Zn: 26.7%, Pb: 2.4%, S: 29.8%, Fe: 22.4%, SiO 2 : 8.97%, the content of valuable element Au is 8 g / t, the mixed concentrate is stacked in the silo, heated and dried at 80°C to obtain a concentrate with a water content of 7.5%.

[0035] Roast the concentrate with a water content of 7.5% at a temperature of 1000°C for 1 hour to obtain a zinc calcine with a su...

Embodiment 3

[0038] Embodiment 3: a kind of dressing and smelting combined method of refractory copper-zinc sulfide ore, concrete operation is as follows:

[0039] A refractory copper-zinc sulfide ore, the mass percentage of its chemical composition is: Cu 1.5%, Zn 7%, Sn 0.2% S9.5%, Fe 18%, the content of valuable element Au is 1.5 g / t, will After the ore is crushed and ground, 75% of the material is obtained with a particle size of less than 74μm in terms of mass, and then copper-zinc mixed concentrate is obtained through copper-zinc mixed flotation, and its chemical composition is mainly: Cu 12.6%, Zn 26.5% , Sn 1.8%, S 33%, Fe 21.5%, SiO 2 3.24%, the content of the valuable element Au is 8g / t, the mixed concentrate is stacked in the silo, heated and dried at 150°C to obtain a concentrate with a water content of 5%.

[0040] Roast the concentrate with a water content of 5% at 1050°C for 3 hours to obtain a zinc calcine with a sulfur content of 1% and a water content of 0.1%. Mix coke,...

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Abstract

The invention discloses a dressing and smelting combination method for copper-zinc sulfide ores difficult to treat and belongs to the field of dressing and smelting. The dressing and smelting combination method for the copper-zinc sulfide ores is used for solving the problems that flotation separation of the copper-zinc sulfide ores is difficult, the traditional dressing and smelting process is long, and the treatment cost is high. Firstly, the copper-zinc sulfide ores are treated through the processes of ore crushing, ore grinding and mixing flotation, and thus mixed flotation concentrates are obtained; then, roasted zinc is obtained after drying and oxidation roasting, coke and slag forming constituents are added for reduction smelting, thus a zinc product, smelted upper-layer slag and smelted bottom slag are obtained, the upper-layer slag is directly used for being sold or used as paving stone, and copper in the bottom slag is enriched preliminarily; and finally, the bottom slag issubjected to selective oxidation smelting at the temperature of 1350-1550 DEG C, thus a primary copper product and ferrous oxide slag are obtained, and the ferrous oxide slag is directly used for ironsmelting or dye manufacturing. The dressing and smelting combination method provides a new method for clean utilization of the copper-zinc sulfide ores difficult to treat, the total recycling rate ofcopper is 80%-90%, and the total recycling rate of zinc is 82%-92%, and the method is short in process, environmentally friendly, and good in industrializing application prospect.

Description

technical field [0001] The invention belongs to the field of beneficiation and smelting, and in particular relates to a combined method of beneficiation and smelting of refractory copper-zinc sulfide ores. Background technique [0002] China has abundant reserves of zinc resources, but the proportion of copper-lead-zinc polymetallic complex sulfide ores is relatively large. Such ores have the characteristics of fine particle size and complex symbiotic relationship, which makes subsequent flotation separation difficult. Copper-zinc sulfide ores are one of them. Typical complex and refractory sulfide ores. The origin of copper-zinc sulfide ore deposits is usually a high-temperature deposit. Chalcopyrite is fine-grained and disseminated in sphalerite. Even if the monomer is dissociated, the ore must be ground below 5-10 μm, thereby increasing the solubility of ore particles and reducing The collision probability of bubbles is reduced, and the flotation recovery rate is reduced...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B15/00C22B19/02C22B1/02
CPCC22B15/003C22B15/0013C22B19/02C22B19/20
Inventor 郑永兴王华文书明蓝卓越赖振宁吕晋芳
Owner KUNMING UNIV OF SCI & TECH
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