Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A double-layer composite pellet for treating copper slag and its preparation method

A double-layer composite and copper slag technology is applied in the field of double-layer composite pellets for treating copper slag and its preparation, which can solve the problem of less research on the removal of harmful elements or harmless treatment, environmental pollution, and the treatment effect needs to be improved. question

Active Publication Date: 2021-06-01
NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the treatment methods for copper slag mainly focus on the utilization of elements such as iron and copper, but copper slag also contains a certain amount of harmful elements such as S and As, which need to be removed or harmlessly treated, otherwise cause serious environmental pollution
However, the methods in the prior art have little research on the removal or harmless treatment of harmful elements such as S and As, and the treatment effect needs to be improved.

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
  • A double-layer composite pellet for treating copper slag and its preparation method
  • A double-layer composite pellet for treating copper slag and its preparation method
  • A double-layer composite pellet for treating copper slag and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0031] The present invention provides a method for preparing the double-layer composite pellets described in the above technical solution, comprising the following steps:

[0032] Pretreatment is carried out by mixing copper slag, potassium permanganate and part of water to obtain pretreated copper slag;

[0033] mixing the pretreated copper slag, iron powder, manganese dioxide, binder and remaining water, and then performing the first granulation to obtain a ball core;

[0034] spraying water glass on the surface of the ball core and mixing it with the cladding material, and then performing the second granulation to obtain green balls;

[0035] In an oxidizing atmosphere, the green balls are dried to obtain double-layer composite pellets.

[0036] The invention mixes copper slag, potassium permanganate and part of water for pretreatment to obtain pretreated copper slag. In the present invention, it is preferred to dissolve potassium permanganate with part of the water as a ...

Embodiment 1

[0050] Spray 50°C potassium permanganate aqueous solution (mass concentration is 0.5%, dosage is 30g) on ​​the surface of copper slag (particle size is 150~200 mesh, dosage is 1000g), after mixing uniformly, let it stand at 30°C for pretreatment Process 2h, obtain pretreatment copper slag;

[0051] With described pretreatment copper slag and fine iron powder (particle size is 200~300 order, grade is 60%, consumption is 100g), manganese dioxide (consumption is 30g), binding agent (carboxymethyl cellulose, consumption is 11.66g) were mixed, and then mixed with water, and the resulting mixture was placed in a disc pelletizer for the first granulation (the time was 7min) to obtain spherical cores (the particle size was 8-10mm, and the water content was controlled at 8-10mm). %);

[0052] Spray water glass (with a modulus of 1) on the surface of the ball core, mix it with the coating material (CaO, particle size 200-250 mesh) and place it in a disc pelletizer for the second granul...

Embodiment 2

[0055] Prepare double-layer composite pellets according to the method of embodiment 1, and difference is that binding agent is bentonite; Water glass modulus is 2; Covering material is Mg(OH) 2 .

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

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
thicknessaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention relates to the technical field of chemical by-product treatment, in particular to a double-layer composite pellet for treating copper slag and a preparation method thereof. The double-layer composite pellets for treating copper slag provided by the present invention include a core and a coating layer adhered to the surface of the core, and the raw materials for preparation include copper slag, fine iron powder, potassium permanganate, manganese dioxide, coating Covering material, binder, water glass and water. The fine iron powder in the present invention can improve the ball forming rate of double-layer composite pellets, and is beneficial to promote the nucleation and growth of iron grains in the subsequent heat treatment process, and improve the recovery rate of valuable elements such as iron and silicon; A transition area is formed between the core and the cladding layer, and at the same time, the bonding between the cladding material and the ball core is realized, which is beneficial to improving the strength of the green ball; potassium permanganate will decompose and release oxygen under high temperature conditions, and at the same time produce manganese dioxide, oxygen And manganese dioxide can be used as an oxidant to oxidize sulfur and arsenic in the system to improve the removal effect of sulfur and arsenic.

Description

technical field [0001] The invention relates to the technical field of chemical by-product treatment, in particular to a double-layer composite pellet for treating copper slag and a preparation method thereof. Background technique [0002] At present, pyrometallurgy plays a dominant role in the copper production process. However, a large amount of copper slag will be produced in the process of pyrometallurgy. When 1 ton of copper is produced by pyrometallurgy, 2.2 tons of copper slag will be produced at the same time. At present, the accumulated stockpile has reached 200 million tons. [0003] Copper slag contains 30-40% iron and 0.5-2% copper, which has high recycling value. At present, the treatment methods for copper slag mainly focus on the utilization of elements such as iron and copper, but copper slag also contains a certain amount of harmful elements such as S and As, which need to be removed or harmlessly treated, otherwise It will cause serious environmental poll...

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
Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/243C22B1/244C22B1/248
Inventor 赵凯张巧荣王彬魏志芳孔征张晓华师学峰韩伟刚
Owner NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com