Method for recycling valuable metal from copper smelting white smoke

A valuable metal, white smoke technology, applied in the direction of improving process efficiency, can solve problems such as insufficient utilization, environmental pollution, large amount of fossil fuel or power consumption

Inactive Publication Date: 2016-04-06
KUNMING UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Smelting is the most important smelting process of pyrometallurgy copper smelting. The traditional smelting method is carried out in blast furnace, reverberatory furnace and electric furnace. The main disadvantage of this process is that it cannot fully utilize the chemical reaction heat of sulfide oxidation in the charge as energy. Large amount of fuel or electric energy consumption; output S0 2 The flue gas concentration is low, the production of sulfuric acid is uneconomical...

Method used

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  • Method for recycling valuable metal from copper smelting white smoke
  • Method for recycling valuable metal from copper smelting white smoke
  • Method for recycling valuable metal from copper smelting white smoke

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Such as figure 1 Shown: (1) Main components of white soot ash and primary power wave cycle waste acid are shown in Tables 1 and 2;

[0033] Table 1 Main components of white soot

[0034]

[0035] Table 2 Main components of waste acid in primary power wave cycle

[0036]

[0037] (2) Take 40 tons of primary power wave circulating waste acid and pump it into the leaching tank, then add 5 tons of white smoke and dust, stir and leaching for 30 minutes at room temperature, filter, wash the filter cake with 1.5 tons of zinc-precipitating liquid and incorporate it into the filtrate , after analysis, copper, zinc, arsenic content are respectively in the filtrate: 2.7g / L, 21.5g / L, 13.3g / L; The filter cake weight of dry basis is 1120kg, and lead content is 43.6wt%, and lead recovery rate is greater than 95.5%, the dissolution rates of copper, zinc and arsenic are 92.6%, 97.5% and 95.5% respectively;

[0038] (3) Take 40m of pickling solution 3 According to 0.8 times the...

Embodiment 2

[0042] (1) The main components of white soot and ash and primary power wave cycle waste acid are shown in Tables 3 and 4;

[0043] Table 3 Main components of white soot

[0044]

[0045] Table 4 Main components of waste acid in primary power wave cycle

[0046]

[0047] (2) Take 40 tons of primary power wave circulating waste acid and pump it into the leaching tank, then add 5 tons of white smoke and dust, stir and leaching for 30 minutes at room temperature, filter, wash the filter cake with 1.5 tons of zinc-precipitating liquid and incorporate it into the filtrate , after analysis, copper, zinc, arsenic content are respectively in the filtrate: 2.9g / L, 23.3g / L, 13.2g / L; The dry basis filter cake quality is 1265kg, and lead content is 40.2wt%, and lead recovery rate is greater than 95.7%, the dissolution rates of copper, zinc and arsenic are 92.8%, 98.6% and 95.1% respectively;

[0048] (3) Take 40m3 of acid leaching solution, add 1.0 times the theoretical amount requ...

Embodiment 3

[0052] (1) The main components of white soot and ash and primary power wave cycle waste acid are shown in Tables 5 and 6;

[0053] Table 5 Main components of white soot

[0054]

[0055] Table 6 Main components of waste acid in primary power wave cycle

[0056]

[0057] (2) Take 40 tons of primary power wave circulating waste acid and pump it into the leaching tank, then add 4 tons of white smoke ash, stir and leaching for 30 minutes at room temperature, filter, wash the filter cake with 1.5 tons of zinc-precipitating liquid and incorporate it into the filtrate , after analysis, copper, zinc, arsenic content are respectively in the filtrate: 2.3g / L, 18.6g / L, 11.5g / L; The filter cake weight of dry basis is 811kg, and lead content is 48.2wt%, and lead recovery rate is greater than 95.5%, the dissolution rates of copper, zinc and arsenic are 92.6%, 97.5% and 95.5% respectively;

[0058] (3) Get 40m3 of pickling solution, add 182kg of solid sodium sulfide with an effective...

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Abstract

The invention relates to a method for recycling valuable metal from copper smelt white smoke and belongs to the technical field of resource recycling. The method includes the steps that the white smoke collected from a second electric field, a third electric field and a fourth electric field through an electric copper smelting smoke collection device serves as a raw material, a first-level power wave circulating cleaning solution serves as a leaching agent, the liquid-solid mass ratio is 8-10:1, leaching is conducted at the normal temperature, and lead-rich slag with the metal grade larger than 40wt% is obtained; sodium sulfide is added to a leaching solution for fractional precipitation so as to recycle copper and rich arsenic, the metal grade of copper-rich slag is larger than 40wt/%, the content of the arsenic in the arsenic-rich slag is larger than 35 wt%, finally, sodium carbonate is added for zinc precipitation, and the metal grade of the zinc-rich slag is larger than 45 wt/%; the valuable metal mentioned above can be used as raw materials for use or sale after being enriched, stockpiling or landfill requirements can be met after the metal is cured, and the arsenic open stub is formed. By the adoption of the method, circulating acid pickle serves as the leaching agent, the system waste acid treatment amount is reduced, valuable elements in the waste acid can be recycled, leaching operation and precipitation operation are conducted at the normal temperature, operation is convenient, and the method has good application and popularization value.

Description

technical field [0001] The invention relates to the technical field of resource utilization of industrial solid waste, in particular to a method for recovering valuable metals from copper smelting white smoke. Background technique [0002] Copper is one of the basic industrial raw materials for modern economic development. Because of its good electrical and thermal conductivity, tensile and wear resistance, it has been widely used in electric power, machinery manufacturing, transportation, construction, energy, military and other industries. . [0003] Smelting is the most important smelting process of pyrometallurgy copper smelting. The traditional smelting method is carried out in blast furnace, reverberatory furnace and electric furnace. The main disadvantage of this process is that it cannot fully utilize the chemical reaction heat of sulfide oxidation in the charge as energy. Large amount of fuel or electricity consumption; output S0 2 The flue gas concentration is lo...

Claims

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Application Information

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IPC IPC(8): C22B7/02C22B15/00C22B19/30C22B19/20C22B13/00
CPCC22B7/007C22B7/02C22B13/045C22B15/0071C22B15/0089C22B19/22C22B19/30Y02P10/20
Inventor 孙宝辉宋连民周杰夏举佩苏毅李国斌罗中秋宁勤科
Owner KUNMING UNIV OF SCI & TECH
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