Method for gradient recovering of copper, cobalt and zinc from sulfur concentrate through low-temperature roasting

A low-temperature roasting, sulfur concentrate technology, applied in rotary drum furnaces, crucible furnaces, furnaces, etc., can solve the problems of waste of resources, poor leaching performance, inability to recover efficiently and economically, and achieve high maturity, easy leaching, comprehensive The effect of high recovery rate

Inactive Publication Date: 2019-09-13
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

Due to the complexity of the ore, polymetallic symbiosis and ore dressing entrainment and other factors, sulfur concentrate often contains a certain amount of copper, cobalt, zinc and other metals, but the traditional sulfur concentrate acid production process focuses on the maximum use of acid production and heat. The higher the roasting temperature, the better. Therefore, copper, cobalt and zinc in the slag usually exist in the form of insoluble copper ferrite, cobalt and zinc, and the leaching performance is poor. This makes the associated copper, cobalt and zinc in the sulfur concentrate unable to Efficient and economical recycling, there is a certain waste of resources

Method used

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  • Method for gradient recovering of copper, cobalt and zinc from sulfur concentrate through low-temperature roasting

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Effect test

Embodiment 1

[0027] A method for recovering copper-cobalt-zinc from sulfur concentrate by low-temperature roasting gradient, such as figure 1 shown, including the following steps:

[0028] S1. Roasting at low temperature: 150 g of sulfur concentrate and 17 g of iron calcined sand were oxidized and roasted at 450° C. for 1 hour; the number of particles with a particle size of -200 mesh in the sulfur concentrate accounted for 65%.

[0029] S2. High-temperature water quenching and one-stage leaching: After low-temperature roasting is completed, take out all the calcined sand obtained by roasting and directly add 334g of water for water quenching; the ore slurry obtained after water quenching is transferred to a stirring tank for one-stage leaching at a stirring rate of 300rpm for 1 hour , the leaching temperature is 80°C.

[0030] S3. High-temperature and high-acid secondary leaching: heat and control the temperature of the pulp after the first stage of leaching to 80°C, add concentrated sul...

Embodiment 2

[0036] A method for reclaiming copper-cobalt-zinc by gradient roasting of sulfur concentrate at low temperature, comprising the steps of:

[0037] S1. Roasting at low temperature: take 150g of sulfur concentrate and 64g of iron calcined sand and oxidize and roast at 700°C for 2 hours. The number of particles with a particle size of -200 mesh in the sulfur concentrate accounts for 65%.

[0038] S2. High-temperature water quenching one-stage leaching: after the low-temperature roasting is completed, take out all the calcined sand obtained by roasting and directly add 428g water for water quenching; the ore slurry obtained after water quenching is transferred to a stirring tank for one-stage leaching, the stirring rate is 500rpm, and the leaching rate is 0.5 h, the leaching temperature is 100°C.

[0039] S3. High-temperature and high-acid secondary leaching: heat and control the temperature of the pulp after the first stage of leaching to 100°C, add concentrated sulfuric acid to...

Embodiment 3

[0045] A method for reclaiming copper-cobalt-zinc by gradient roasting of sulfur concentrate at low temperature, comprising the steps of:

[0046] S1. Roasting at low temperature: take 150g of sulfur concentrate and 50g of iron calcined sand and oxidize and roast at 500°C for 3h. The number of particles with a particle size of -200 mesh in the sulfur concentrate accounts for 65%.

[0047] S2. High-temperature water quenching and one-stage leaching: after the low-temperature roasting is completed, take out all the calcined sand obtained by roasting and directly add 400g of water for water quenching; the ore pulp obtained after water quenching is transferred to a stirring tank for one-stage leaching at a stirring rate of 400rpm for 1h , the leaching temperature is 90°C.

[0048]S3. High-temperature and high-acid secondary leaching: heat and control the temperature of the pulp after the first stage of leaching to 85°C, add concentrated sulfuric acid to the pulp at a rate of 50 g...

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Abstract

The invention discloses a method for gradient recovering of copper, cobalt and zinc from sulfur concentrate through low-temperature roasting. The method comprises the following steps of S1, carrying out low-temperature roasting on the sulfur concentrate; S2, carrying out high-temperature water quenching and one stage leaching; S3, carrying out high-temperature high-acid two-stage acid leaching; S4, extracting the copper; S5, removing iron and manganese by introducing mixed gas of sulfur dioxide and air; S6, selectively precipitating the cobalt by using organic sulfide; and S7, precipitating the zinc. According to the method, gradient recovery of the copper, the cobalt and the zinc in the sulfur concentrate can be realized.

Description

technical field [0001] The invention relates to the technical field of hydrometallurgy, in particular to a method for recovering copper, cobalt and zinc by gradient roasting of sulfur concentrate at low temperature. Background technique [0002] Sulfur concentrate is one of the important raw materials for the production of industrial sulfuric acid. It mainly contains sulfur and iron, and the total content of sulfur and iron is often above 80%. After the sulfur concentrate is roasted to make acid, the slag is generally sold as low-quality iron concentrate. Due to the complexity of the ore, polymetallic symbiosis and ore dressing entrainment and other factors, sulfur concentrate often contains a certain amount of copper, cobalt, zinc and other metals, but the traditional sulfur concentrate acid production process focuses on the maximum use of acid production and heat. The higher the roasting temperature, the better. Therefore, copper, cobalt and zinc in the slag usually exist ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/02C22B3/04C22B3/08C22B3/30C22B15/00C22B19/20C22B23/00
CPCC22B1/02C22B3/04C22B3/08C22B15/0071C22B19/20C22B23/0461C22B3/30
Inventor 林海彬陈庆根王乾坤衷水平丁文涛许晓阳
Owner 厦门紫金矿冶技术有限公司
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