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Method for dechlorination by using zinc powder in zinc hydrometallurgy copper slag

A technology of hydrometallurgy and dechlorination, which is applied in the field of resource recovery and utilization, and can solve problems such as poor alkali cleaning effect and high chlorine content in copper slag

Active Publication Date: 2019-08-20
陕西三秦环保科技股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] According to the existing situation, the traditional hydrometallurgy copper slag recycling technology mainly has the following problems: the chlorine content in the copper slag is high, the alkali cleaning effect is not good, and the leaching liquid Cl - Exceeding the standard (Cl - >1.0g / l)

Method used

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  • Method for dechlorination by using zinc powder in zinc hydrometallurgy copper slag

Examples

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Effect test

Embodiment 1

[0033] This embodiment takes the project design of recycling zinc and copper slag from hydrometallurgy as an example.

[0034] The following are the production operation and process control requirements of each process:

[0035] 1. One pulping process.

[0036] ⑴Before feeding, slap and grind large pieces of copper slag to remove debris.

[0037] ⑵According to the liquid-solid ratio of 4:1, inject 6 cubic meters of water into a single slurry tank, put in 1.5 tons of copper slag, and stir for 30 minutes.

[0038] (3) The slurry is pumped to the No. 1 filter press for solid-liquid separation, the filter cake is put into the slurry tank below for secondary slurrying, and the filtrate flows automatically to the No. 2 filter press slurry tank for storage.

[0039] ⑷ 10 tons of pulped copper slag per day, a total of 4 batches and 7 pulping tanks.

[0040] ⑸The total amount of brine in a pulping process is about 15 cubic meters, which can be recycled. After 10 cycles, take sample...

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Abstract

The invention provides a method for dechlorination by using zinc powder in zinc hydrometallurgy copper slag. The method comprises the following steps of: (1) primary pulping; (2) secondary pulping andball milling, (3) ternary pulping and first-section leaching; (4) quartic pulping and second-section leaching; and (5) dechlorination. O2+H2O2 is adopted as oxidizing agents; and through adjustment of the process sequence and the oxidization leaching step, Cu, CuS and CuCl are effectively oxidized by one step, and meanwhile, Cl- in CuCl is released.

Description

technical field [0001] The invention relates to a resource recovery and utilization process technology, specifically a dechlorination technology using zinc powder in copper slag, in particular a method for using zinc powder to dechlorinate copper slag in wet smelting. Background technique [0002] According to the existing situation, the traditional hydrometallurgy copper slag recycling technology mainly has the following problems: the chlorine content in the copper slag is high, the alkali cleaning effect is not good, and the leaching liquid Cl - Exceeding the standard (Cl - >1.0g / l). Contents of the invention [0003] In order to solve the above-mentioned technical problems, the main purpose of the present invention is to provide a method for dechlorinating zinc powder in hydrometallurgy copper slag. [0004] Its technical solution is: [0005] A method for utilizing zinc powder dechlorination in zinc hydrometallurgy copper slag, comprising the steps: [0006] Ste...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B15/00C22B13/00C22B11/00C25C1/12
CPCC22B7/006C22B7/007C22B11/044C22B13/045C22B15/0089C25C1/12Y02P10/20
Inventor 田延生左武军王会刚华媛薛子波宋曦梅
Owner 陕西三秦环保科技股份有限公司