Method of recycling zinc by comprehensively utilizing steelmaking dust

A dust and powder technology, applied in the field of comprehensive utilization of steelmaking dust to recover zinc, can solve the problems of large output of three wastes, high cost and high energy consumption, and achieve the effects of low gas pressure, improved recovery rate, and reduced emissions

Active Publication Date: 2019-04-02
GUIZHOU UNIV
View PDF11 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This application promotes the reduction of zinc in steelmaking dust through the addition of additives, realizes the recycling of steelmaking dust, obtains high-quality zinc ingots, and reduces the energy consumption when vacuum conditions are controlled during the steelmaking dust treatment process. And the process is simple, easy to operate, vacuum reduction can effectively evaporate the zinc in the steelmaking dust, achie

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A method for comprehensive utilization of steelmaking dust to recover zinc, comprising the following steps:

[0037] (1) after mixing steelmaking dust with reducing agent and water, press into pellets; the reducing agent is coke powder; the pressing into pellets is after first mixing steelmaking dust, reducing agent and water uniformly, Then feed into a mold with a diameter of 20.01mm for briquetting; the pressure for pressing into pellets is 11MPa; the steel-making dust, reducing agent and water are mixed according to the following weight parts: 100 parts of steel-making dust, 6 parts of reducing agent 0.4 parts of water; before pressing into pellets, first use a ball mill to ball mill the steel-making dust into powder with a mesh size of 30 meshes, mix it with a reducing agent evenly, and then send it to a grinder to grind into a powder with a mesh size of 80 meshes , and then add water to mix;

[0038] (2) the pellet of step (1) is sent into vacuum carbon tube furna...

Embodiment 2

[0042] A method for comprehensive utilization of steelmaking dust to recover zinc, comprising the following steps:

[0043] (1) after mixing steelmaking dust with reducing agent and water, press into pellets; the reducing agent is coke powder; the pressing into pellets is after first mixing steelmaking dust, reducing agent and water uniformly, Then feed into a mold with a diameter of 30mm and press the ball to form; the pressure for pressing into pellets is 19MPa; the steel-making dust, reducing agent and water are mixed according to the following weight parts: 100 parts of steel-making dust and 8 parts of reducing agent , 0.7 parts of water; before pressing into pellets, first use a ball mill to ball mill the steel-making dust to form a powder with a mesh size of 60 meshes, mix it with a reducing agent evenly, and then send it to a grinder to grind into a powder with a mesh size of 120 meshes. Then add water to mix;

[0044] (2) the pellet of step (1) is sent into vacuum car...

Embodiment 3

[0048] A method for comprehensive utilization of steelmaking dust to recover zinc, comprising the following steps:

[0049] (1) After mixing steelmaking dust with reducing agent, additive and water, press it into pellets; the additive is diboron trioxide; the reducing agent is coke powder; After the steel dust, reducing agent, additives and water are mixed evenly, they are then sent to a mold with a diameter of 21.05mm for briquetting; the pressure for pressing into pellets is 12MPa; the steelmaking dust, reducing agent, additives and water are as follows Mixing by weight: 100 parts of steel-making dust, 8 parts of reducing agent, 2 parts of additives, 0.5 part of water; before pressing into pellets, the steel-making dust is ball-milled with a ball mill, and ball-milled into powder with a mesh size of 40 mesh , mixed evenly with the reducing agent, and then sent to the grinder to grind into powder with a mesh size of 90 meshes, and then add additives and water for mixing;

[...

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 discloses a method of recycling zinc by comprehensively utilizing steelmaking dust. The method comprises the following steps that steelmaking dust is mixed with a reducing agent and an additive and is pressed into pellets, the pellets are fed into a vacuum carbon tube furnace to carry out vacuum roasting to obtain gaseous elementary zinc volatile matter, the gaseous elementary zinc volatile matter passes through a condensation collector to be condensed to a solid, and the solid is obtained as a high-purity zinc ingot. The method promotes the reduction of zinc in steelmaking dustand recycles the steel-making dust, so that the high-quality zinc ingot is obtained, energy consumption during the control of vacuum condition in the steelmaking dust treatment process is reduced, theprocess is simple, the operation is simple and convenient, the vacuum reduction can effectively evaporate the zinc in the steelmaking dust, the purpose of condensing and collecting elementary zinc isachieved, the recovery rate of the zinc in the steelmaking dust is up to 97. 76%, the problem that in the prior art, the cost is high, the pollution is heavy, the energy consumption is high and threewastes are large when zinc-containing steel-making dust is treated are solved is effectively solved, and finally, the purpose of waste recycling is achieved.

Description

technical field [0001] The invention belongs to the technical field of comprehensive utilization of secondary resources, and in particular relates to a method for comprehensive utilization of steelmaking dust to recover zinc. Background technique [0002] Iron and steel enterprises will generate a lot of dust in various processes such as ironmaking, steelmaking and steel rolling, accounting for about 10% of the total steel output. It is one of the main pollution sources of iron and steel plants, and it is also a potential secondary resource. Due to the different levels of raw materials and fuels in various iron and steel enterprises, the dust contains not only high iron content, but also high zinc content. If it is directly returned to sintering as an ingredient, zinc will be continuously circulated and enriched, which will bring about blast furnace results. The bad influences such as tumor, upturned tuyere damage, etc. seriously endanger the smooth operation of the steel sm...

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): C22B7/02C22B1/248C22B1/02C22B5/10C22B19/04C22B19/30
CPCC22B1/02C22B1/248C22B5/10C22B7/001C22B7/02C22B19/04C22B19/30Y02P10/20
Inventor 黄润武庆慧吕晓东伍秦至赵世翻徐本军张金柱
Owner GUIZHOU UNIV
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