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Method for copper smelting white smoke dust arsenic removal

A white smoke, copper smelting technology, applied in the direction of improving the process efficiency, can solve the problems such as the inability to fully utilize the heat of chemical reaction as energy, the consumption of fossil fuel or electric energy, and the low concentration of the output flue gas, and achieve strong acidity. , The equipment has large production capacity and good effect.

Active Publication Date: 2017-05-31
KUNMING UNIV OF SCI & TECH
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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 make full use of 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 low, the production of sulfuric acid is uneconomical, and it is easy to cause serious pollution to the environment

Method used

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  • Method for copper smelting white smoke dust arsenic removal
  • Method for copper smelting white smoke dust arsenic removal
  • Method for copper smelting white smoke dust arsenic removal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A method for removing arsenic from copper smelting white fume described in this embodiment specifically includes the following steps:

[0031] (1) Acidification: The main components of white soot are shown in Table 1.1. Take 1 ton of the white soot and put it into an acidification tank with a seal and a stirring device. After calculation, the theoretical amount of acid used to convert arsenic into arsenic acid It is 301kg, calculated by 1.1 times, add 331kg of 98% sulfuric acid, start the mixer after adding acid, and let stand for 5 hours after homogenization;

[0032] Table 1.1 Main components of white soot (mass percentage %)

[0033]

[0034] (2) Dissolution: After the acidification in step (1), add 4 tons of water, operate at room temperature, and dissolve under stirring for 1.0 hour, and the stirring speed can be as long as the solid has relative flow;

[0035] (3) Re-sedimentation: Step (2) After the dissolution, add solid sodium carbonate to adjust the pH val...

Embodiment 2

[0038] A method for removing arsenic from copper smelting white fume described in this embodiment specifically includes the following steps:

[0039] (1) Acidification: The main components of white soot are shown in Table 2.1. Take 1 ton of the white soot and put it into an acidification tank with a seal and a stirring device. After calculation, the theoretical amount of acid used to convert arsenic into arsenic acid It is 284kg, calculated by 1.2 times, add 341kg of 98% sulfuric acid, start the mixer after adding acid, and leave standstill for 4 hours after homogenization;

[0040] Table 2.1 Main components of white soot (mass percentage %)

[0041]

[0042] (2) Dissolution: After the acidification of step (1), add 5 tons of water for the first washing solution in step (4) of Example 1, operate at room temperature, and dissolve for 1.5 hours under stirring. The stirring speed is relative to the solid. Just flow;

[0043] (3) Re-sedimentation: after the dissolution in ste...

Embodiment 3

[0045] A method for removing arsenic from copper smelting white fume described in this embodiment specifically includes the following steps:

[0046] (1) Acidification: The main components of white soot are shown in Table 3.1. Take 1 ton of the white soot and put it into an acidification tank with a seal and a stirring device. After calculation, the theoretical amount of acid used to convert arsenic into arsenic acid It is 269kg, calculated by 1.15 times, add 310kg of 98% sulfuric acid, start the stirrer after adding acid, leave standstill for 4.5 hours after homogenization;

[0047] Table 3.1 Main components of white soot (mass percentage %)

[0048]

[0049] (2) Dissolution: After the acidification in step (1), add 4.5 tons of water for the first washing solution in step (4) of Example 2, operate at room temperature, and dissolve for 1 hour under stirring. The stirring speed is relative to the solid. Just flow;

[0050] (3) Re-sedimentation: Step (2) After the dissoluti...

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Abstract

The invention discloses a method for copper smelting white smoke dust arsenic removal. White smoke dust collected by a copper smelting electric dust remover is used as a raw material, arsenic is converted into arsenic acid through a concentrated sulfuric acid acidification method, the arsenic acid is dissolved with water for 1-1.5 hours, and the water adding amount is 4-5 times the weight of the white smoke dust; after dissolution, solid sodium carbonate is added to adjust the pH value to 8.0-8.5, soluble metallic sulfate is converted into settlement, after being filtered to be separated from sodium arsenate salt, the settlement is washed twice with clear water, and an obtained filter cake is an arsenic-removed filter cake rich in valuable metal, wherein the arsenic content of the filter cake is lower than 0.5%; and filter liquor enters a main produced lime-molysite arsenic removal system, and newly adding of waste water treatment equipment is not needed. According to the method, the equipment is simple, heating is not needed, operation is convenient, the arsenic removal rate is high, and the arsenic content of acidized slag meets the third-level quality standard requirement of bing ore; and convenience is provided for recovery of other acid-soluble valuable metals in the white smoke dust, and the method has good application and popularization value.

Description

technical field [0001] The invention relates to a method for removing arsenic from copper smelting white smoke and belongs to the technical field of separation and treatment of hazardous solid waste hazard sources. 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 properties, it has been widely used in the fields of electric power, machinery manufacturing, transportation, construction, energy, and military industry. [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 make full use of the chemical reaction heat of sulfide oxidation in the charge as energy. Large amount of fuel or electricity consumption; output S0 2 The flue g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/02C22B30/04C22B19/30C22B19/20C22B15/00C22B30/06
CPCC22B7/007C22B7/02C22B15/0071C22B15/0089C22B19/22C22B19/30C22B30/04C22B30/06Y02P10/20
Inventor 夏举佩杨劲罗中秋刘海浪
Owner KUNMING UNIV OF SCI & TECH
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