Unlock instant, AI-driven research and patent intelligence for your innovation.

A method for harmless treatment of electroplating sludge using metallurgical sintering blast furnace

A technology of harmless treatment and electroplating sludge, applied in blast furnaces, blast furnace details, furnaces, etc., can solve the problems of incomplete treatment of metallurgical waste, environmental pollution of electroplating sludge, etc., prevent secondary diffusion pollution, and have obvious environmental benefits , Improve the effect of detoxification effect

Active Publication Date: 2016-03-02
CHONGQING ANGRUIYUE SCI & TECH
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of recycling of metallurgical waste resources produced by iron and steel enterprises and the environmental pollution caused by a large amount of electroplating sludge containing heavy metals and hexavalent chromium produced by electroplating enterprises, and to overcome the inadequacy that existing technologies cannot completely deal with metallurgical waste and electroplating sludge , the present invention provides a method for harmless treatment of electroplating sludge by using a metallurgical blast furnace to realize the harmless treatment of electroplating sludge and the recycling of metallurgical waste, and at the same time improve the metallurgical properties of sintering and mixing materials

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 method for harmless treatment of electroplating sludge using metallurgical sintering blast furnace
  • A method for harmless treatment of electroplating sludge using metallurgical sintering blast furnace
  • A method for harmless treatment of electroplating sludge using metallurgical sintering blast furnace

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0068] Example 1: 40% electroplating sludge and 60% reducing metallurgical waste are used as raw materials for the ball core, the weight of the ball core is 1 kg, and the particle size is (3-6) mm. 30% (0.3kg) of the weight of the core is added with a pre-coating material (gravity dust removal) for pre-coating. Then the ball core is pre-coated according to the weight ratio of 1:1 (1.3kg) to cover the spherical shell with sulfuric acid Slag and sintering dust to form secondary composite pellets. After sintering, the hexavalent chromium is 1.31mg / L (less than the national standard 5mg / L), and the nickel is 0.5mg / L (less than the national standard 5mg / L).

example 2

[0070] Example 2: 50% of electroplating sludge and 50% of reducing metallurgical waste are used as raw materials for the core, the weight of the core is 1 kg, and the particle size is (3-6) mm; 25% (0.25 kg) of the weight of the core is added with pre-coating material (gravity dust removal) for pre-coating. Then, according to the ratio of 1:1 (1.25kg) of the pre-coated ball core, add spherical shell material sulfuric acid slag and sintering dust to form a secondary composite pellet. After sintering, it is detected that the hexavalent chromium is 1.5mg / L (less than the national standard 5mg / L), and the nickel is 1.1mg / L (less than the national standard 5mg / L)

[0071] Comparative example: 50% of electroplating sludge and 50% of reducing metallurgical waste are used as raw materials for the ball core, the weight of the ball core is 1 kg, and the particle size is (3-6) mm; After sintering, it was detected that hexavalent chromium was 2.80mg / L and nickel was 1.98mg / L.

example 3

[0072] Example 3: 60% of electroplating sludge and 40% of reducing metallurgical waste are used as raw materials for the ball core, the weight of the ball core is 1 kg, and the particle size is (3-6) mm; pre-coating material gravity dust is added according to 40% of the weight of the ball core material 0.4kg, pre-coated. Then add the sulfuric acid slag of the spherical shell material and 2.8 kg of sintering dedusting ash according to the weight ratio of 1:2 to the pre-coated ball core to form a secondary composite pellet. After sintering, the hexavalent chromium is 0.21mg / L (less than the national standard 5mg / L), and the nickel is 0.8mg / L (less than the national standard 5mg / L).

[0073] Comparative example: 60% of electroplating sludge and 40% of reducing metallurgical waste are used as raw materials for the ball core, the weight of the ball core is 1kg, and the particle size is (3-6) mm; then the spherical shell material is added in a ratio of 1:2 to the weight of the spher...

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
diameteraaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention provides a method for harmlessly treating electroplating sludge in a metallurgical sintering blast furnace. The method comprises the following steps: firstly, pre-treated electroplating sludge and reducing metallurgical waste material are taken as raw materials to produce a spherical core; secondly, the spherical core is pre-coated, and then the pre-coated spherical core, sulfate pitch and metallurgical waste material are made into compound pellets by a secondary material compounding technology; finally, the compound pellets are put in a sintering blast furnace system. The method provided by the invention can solve the problem about reutilization of metallurgical waste material resources produced in large amounts by iron and steel enterprises as well as the problem of environmental pollution caused by a great amount of electroplating sludge containing heavy metals and hexavalent chromium and produced by electroplating enterprises, achieves harmless treatment of electroplating sludge and reutilization of metallurgical waste materials, and meanwhile improves the metallurgical performance of sintering and mixing materials.

Description

technical field [0001] The invention belongs to the field of metallurgical ironmaking and steelmaking technology and hazardous and harmful solid waste treatment technology, and specifically relates to the production of pellets in metallurgical ironmaking, the production of steelmaking slagging agents and the harmless treatment technology for electroplating sludge, which can improve the The recycling of metallurgical waste and metallurgical performance can realize the harmless treatment of electroplating sludge. Background technique [0002] At present, for the recycling of metallurgical waste resources and the harmless treatment of electroplating sludge, all iron and steel enterprises and related electroplating production enterprises are facing the same problem, and there is no effective technology to completely solve it. Some iron and steel enterprises only consume a small amount of metallurgical waste, and a large amount of metallurgical waste has a direct restriction on t...

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): C22B1/248C22B1/22C21B5/00
CPCY02P10/20
Inventor 李秉正肖瑜汤勇
Owner CHONGQING ANGRUIYUE SCI & TECH