Process for efficiently treating copper smelting smoke dust

A technology of copper smelting and dust, which is applied in the field of hazardous dust treatment, can solve the problems of difficult disposal of arsenic-containing solid waste, low lead content in copper smelting dust, and low quality of arsenic trioxide, so as to realize effective recycling of waste and guarantee occupational Healthy, high recovery rate of valuable metals

Inactive Publication Date: 2020-06-05
云南锡业研究院有限公司
View PDF7 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process can comprehensively recover the valuable metal copper, but after the arsenic is leached, it is produced in the form of calcium arsenate and iron arsenate, and another arsenic-containing solid waste is formed. It is difficult to dispose of objects, and there are potential safety hazards
[0005] (2) Blast furnace smelting process: due to the low lead content in copper smelting dust, the material cannot be directly processed by blast furnace smelting process, but can on...

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Process for efficiently treating copper smelting smoke dust

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A process for efficiently treating copper smelting smoke and dust. The copper smelting smoke and dust is the smoke and dust generated by electric dust collection during the copper smelting process. The smoke and dust components are as follows:

[0035] Numbering sn As Pb Fe Cu Zn raw material 1 2.64 13.86 11.70 4.01 1.041 12.51

[0036] The processing steps are as follows:

[0037] (1) Take 10 kg of copper smelting dust, 0.5 kg of coke powder, and 1 kg of sulfuric acid, mix them evenly, and slowly feed them into the special microwave oven for smelting and volatilization through screw feeding. The temperature is controlled at about 550 ° C, and the material stays in the furnace for 3 hours. Negative pressure in the furnace is -20~-10Pa, microwave roasting is carried out, and the arsenic trioxide product is collected in the settling chamber of the microwave oven. The purity of the obtained product is 92.3%.

[0038] (2) Take the roast...

Embodiment 2

[0042] A process for efficiently treating copper smelting smoke and dust. The copper smelting smoke and dust is the smoke and dust generated by electric dust collection during the copper smelting process. The smoke and dust components are as follows:

[0043] The processing steps are as follows:

[0044] Numbering sn As Pb Fe Cu Zn raw material 2 6.90 14.89 10.31 1.40 2.65 7.52

[0045] (1) Take 10 kg of copper smelting dust, 3 kg of coke powder and coal powder, and 2 kg of sulfuric acid, mix them evenly, and slowly enter the special microwave oven for smelting and volatilization through screw feeding, control the heating temperature to 500 ° C, and the residence time of the materials in the furnace for 3 hour, the negative pressure in the furnace is -20~-10Pa, microwave roasting is carried out, the arsenic trioxide product is collected in the settling chamber, the product purity is 94.1%, and the flue gas is absorbed by sodium hydroxide alka...

Embodiment 3

[0050] A process for efficiently treating copper smelting smoke and dust. The copper smelting smoke and dust is the smoke and dust generated by electric dust collection during the copper smelting process. The smoke and dust components are as follows:

[0051] Numbering sn As Pb Fe Cu Zn raw material 2 4.67 16.32 14.66 0.814 1.97 8.46

[0052] The treatment process is as follows:

[0053] (1) Take 10 kg of copper smelting dust, 5 kg of coal powder, and 4 kg of sulfuric acid and mix them evenly, then slowly enter the special microwave oven for smelting volatilization through screw feeding, control the microwave heating temperature at 700 ° C, and keep the materials in the furnace for 2 hours. The negative pressure in the furnace is -20~-10Pa, microwave roasting is carried out, and the arsenic trioxide product is collected in the settling chamber, and the product purity is 95.4%.

[0054] (2) Take the roasted slag obtained in step (1) in the ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a process for efficiently treating copper smelting smoke dust. The process comprises the steps that copper smelting smoke dust is added with 5-50% of coke powder or/and powdered coal and 10-40% of sulfuric acid and fed into a microwave oven, microwave heating roasting is carried out in a negative pressure state, arsenic trioxide is formed from arsenic in the copper smelting smoke dust and volatilized in the form of smoke, smoke is collected and settled, and an arsenic trioxide product is obtained; roasting slag is directly leached through acidic wastewater, zinc, copper and residual arsenic in the roasting slag are leached in a leaching solution, and tin, lead and other materials enter the leaching slag; and an extractant is added into the leaching solution to extract copper, after a crude copper product is produced through electrodeposition, calcium hydroxide is added into raffinate in the oxygen introducing environment to adjust the pH value to be 7-8, arsenic is precipitated, ferric sulfate is added for deeply removing arsenic, a zinc sulfate solution is obtained, and the zinc sulfate solution is concentrated and evaporated to obtain a zinc sulfate product. Arsenic, zinc, copper, tin and lead in smoke dust are separated in steps, the recovery rate of valuable metals is high, the process flow is short, and the operation is simple, convenient, safe andenvironmentally friendly.

Description

technical field [0001] The invention relates to the technical field of processing methods for harmful fumes generated in copper smelting production. Background technique [0002] Copper smelting dust is the product of copper smelting electric dust collector treatment flue gas, which mainly contains tin, copper, lead, zinc, indium and other valuable metals, and also contains 10-20% arsenic, which is a dangerous smelting intermediate material. The main feature of this material is that there are many types of valuable metals, the content is low, and it needs comprehensive treatment. At the same time, it also contains a part of arsenic, which must be disposed of safely and should be used as effectively as possible. Efficient and selective arsenic removal and retention of valuable metals are the key to the development and utilization of this material. [0003] At present, the treatment methods of copper smelting dust mainly include wet leaching process, blast furnace smelting, s...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C22B7/02C22B1/02C22B30/04C22B3/30C22B15/00C22B19/20C22B19/30C25C1/12C22B13/02C22B23/02
CPCC22B1/02C22B7/001C22B7/006C22B7/007C22B13/025C22B13/045C22B15/0065C22B19/20C22B19/30C22B23/02C22B23/0415C22B30/04C25C1/12C22B3/30Y02P10/20
Inventor 张振华张洪徐瑞东黄迎红王晓福向春樊新淼
Owner 云南锡业研究院有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap