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

Method for Smelting Laterite Nickel Ore in Blast Furnace for Reducing Magnesium Oxide Content in Slag

A lateritic nickel ore and blast furnace smelting technology, applied in blast furnaces, blast furnace details, furnaces, etc., can solve problems such as metal loss, unstable furnace conditions, and high production costs, and achieve lower melting point, lower magnesium oxide content, and good slag removal Effect

Active Publication Date: 2017-09-29
SICHUAN JINGUANG IND GRP
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to reduce the magnesium oxide content of the slag in blast furnace smelting laterite nickel ore, so as to avoid problems such as unstable furnace conditions, serious metal loss, and high production costs caused by high magnesium oxide content, and improve the use of blast furnace slag in the cement industry. reduce the environmental pressure caused by blast furnace slag

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
  • Method for Smelting Laterite Nickel Ore in Blast Furnace for Reducing Magnesium Oxide Content in Slag
  • Method for Smelting Laterite Nickel Ore in Blast Furnace for Reducing Magnesium Oxide Content in Slag
  • Method for Smelting Laterite Nickel Ore in Blast Furnace for Reducing Magnesium Oxide Content in Slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0045] Under the idea described in the specific implementation mode, the applicant gradually improved the production blast furnace smelting process, starting from the raw material process and performing special treatment on low-grade raw ore. During the raw ore screening process, the raw ore with a particle size greater than 25mm and which cannot be further broken is called lump ore. In view of the high content of MgO in the chemical composition of the lump ore and the wide range of particle size fluctuations, in the actual screening process, sieves with apertures of 150mm, 50mm and 25mm were selected to screen out the lump ore. The sieved lumps of different sizes are subjected to coarse crushing, medium crushing, and fine crushing to obtain crushed powder and lumps with a particle size larger than 25mm for sintering, and all laterite nickel ores with a particle size smaller than 25mm are sent to the sintering process. When sintering ingredients, the applicant gave up using li...

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
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for smelting laterite nickel ore in a blast furnace which can reduce the content of magnesia in slag. The method is to sieve the raw laterite nickel ore with a 25mm sieve first, and then crush and sieve the oversize material with a 25mm sieve. The sintered ore is sent to the blast furnace for smelting; in the blast furnace slag removal process, the steelmaking converter refining reduced slag is sprayed into the blast furnace slag for secondary slagging, and the injection amount of the steelmaking converter refining reducing slag is less than 1% of the mass of the blast furnace slag / 12. The invention effectively reduces the MgO content of the blast furnace slag from the original 16-20% to below 10%, can reduce the content of Cr2O3 and FeO, improves the desulfurization effect of the blast furnace, saves lime for steelmaking production, and reduces the production cost of the metallurgical process , to ensure the quality of molten steel, and at the same time, the blast furnace slag can be used in a large amount in the cement industry, with remarkable economic and social benefits.

Description

technical field [0001] The invention belongs to the field of smelting stainless steel with laterite nickel ore, and in particular relates to a method for smelting laterite nickel ore in a blast furnace for reducing the content of magnesium oxide in slag. Background technique [0002] With the rapid development of my country's economy, the demand for stainless steel, which accounts for 65% of nickel use, continues to grow. Due to the lack of nickel resources in my country, domestic iron and steel enterprises import a large amount of low-grade laterite nickel ore from abroad to smelt ferronickel for stainless steel production. The blast furnace smelting of laterite nickel ore is composed of crushing, sintering and smelting of raw materials. Since the composition and physical characteristics of laterite ore are different from ordinary iron ore, the sintering and blast furnace smelting ingredients of laterite ore have their own characteristics, mainly in Sinter basicity, blast ...

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): C21B5/04C22B1/16
Inventor 姚斌马绍华李军王红飞樊宏川李波
Owner SICHUAN JINGUANG IND GRP
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