Molten iron desulphurization slag pre-processing method, slag-iron separating method and application of by-products

A technology of molten iron desulfurization slag and separation method, which is applied in the field of metallurgy to achieve the effects of reducing equipment pressure, improving production efficiency, and improving recycling efficiency

Inactive Publication Date: 2014-03-12
PANZHIHUA GANGCHENG GROUP
View PDF6 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few domestic reports on the dust suppression, hot stuffiness and separation of slag, and it has not been possible to find a favorable way to achieve hot stuffiness and separation.

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

[0040] The hot metal desulfurization slag is brought into the tank for 24 hours, and the temperature of the shell of the slag tank is lowered to below 50°C. After fetching water with the can, pour the molten iron desulfurization slag (45°C) into the slag pit to start hot stuffy, if steam appears during hot stuffy, replenish water according to the amount of steam during hot stuffy, until no steam appears, hot stuffy for 25 hours. After hot stuffing, it is sieved through a grid sieve with a diameter of 120mm in turn. The oversize material is separated by smashing to obtain selected iron (MFe=77%) and smashed slag. Layer vibrating screen, the 80mm sieve is self-grinding and then wet ball milled to separate selected iron (MFe=75%) and tailings, and the 80mm undersieve passes through the lower 10mm vibrating sieve, and the lower 10mm vibrating sieve is connected in series with a 10mm vibrating screen Vibrating sieve; the 10mm vibrating sieve oversize is separated by wet ball millin...

Embodiment 2

[0042] The hot metal desulfurization slag was taken out of the tank for 26 hours, and the temperature of the shell of the slag tank was lowered to below 50°C. After fetching water with the can, pour the molten iron desulfurization slag (35°C) into the slag pit to start hot stuffy, if steam appears during hot stuffy, replenish water according to the amount of steam during hot stuffy, until no steam appears, hot stuffy for 28 hours. After hot stuffing, it is sieved through a grid sieve with an aperture of 150mm in sequence. The oversize material is separated by smashing to obtain selected iron (MFe=78%) and smashed slag. Layer vibrating screen, the 100mm sieve is self-grinding and then wet ball milled to separate selected iron (MFe=76%) and tailings, and the 80mm undersieve passes through the lower 15mm vibrating sieve; the lower 15mm vibrating sieve is connected in series with a 15mm vibrating sieve Vibrating sieve; the 15mm vibrating sieve oversize is separated by wet ball mil...

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 molten iron desulphurization slag pre-processing method, a slag-iron separating method and application of by-products, and belongs to the metallurgy field. The first technical problem that the invention aims to solve is to provide the molten iron desulphurization slag pre-processing method which can control dust and is environment-friendly, and the second technical problem that the invention aims to solve is to provide the slag-iron separating method and application of molten iron desulphurization slag pre-processed by adopting the pre-processing method. The technical scheme adopted by the invention is that the desulphurization slag is subjected to tank-watering, hot disintegration, striking and smashing, screening, grinding, and magnetic separation for recycling iron from the molten iron desulphurization slag; while recycling the metallic iron from the molten iron desulphurization slag, keeping the MFe in tailings smaller than 1%, so that the tailings can be used in cement production.

Description

technical field [0001] The invention belongs to the field of metallurgy, and in particular relates to a method for pretreatment of molten iron desulfurization slag, separation of slag and iron and application of by-products. Background technique [0002] With the rapid development of modern industrial production and science and technology, the requirements for steel quality are increasing day by day. For example, in order to avoid internal cracks in billets and obtain good surface quality, the sulfur content of ordinary steel is required to be less than 0.020%. Such low-sulfur steel is difficult to produce by the traditional blast furnace ironmaking-converter steelmaking process. It can only be produced by adding hot metal pre-desulfurization process before steelmaking and adding external refining process after steelmaking. Especially in the smelting of vanadium-titanium magnetite, due to the high sulfur content of the molten iron, a large amount of desulfurization slag wil...

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): C21B3/06C21B3/08
CPCY02W30/50
Inventor 蒋光旭钱文许钱强
Owner PANZHIHUA GANGCHENG GROUP
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