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

The preparation method and ironmaking raw material of iron ore hot pressure contains carbon balls

A technology for iron-making raw materials and carbon pellets is applied in the field of metallurgy, which can solve the problems of high requirements for heat-resistance and heat preservation performance of hot-pressing equipment, high hot-pressing temperature and high preheating temperature, achieve excellent reduction performance, and simplify the process. Process, effect of good microstructure

Active Publication Date: 2017-01-04
NORTHEASTERN UNIV LIAONING
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method prepares a hot-pressed block with excellent metallurgical properties, but the material in this method has high preheating temperature, high hot-pressing temperature, high energy consumption, complicated process, and high heat-resisting performance of hot-pressing equipment. requirements

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
  • The preparation method and ironmaking raw material of iron ore hot pressure contains carbon balls
  • The preparation method and ironmaking raw material of iron ore hot pressure contains carbon balls
  • The preparation method and ironmaking raw material of iron ore hot pressure contains carbon balls

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Firstly, iron ore fines with particle sizes less than 0.15 mm, 1 / 3 coking coal and metallurgical lime are evenly mixed to obtain the first material. Wherein, the content of the iron ore powder in the first material is 63.3wt%, and the iron ore powder whose particle size is less than 0.075mm accounts for 60% of the total amount of iron ore powder added by volume percentage, and the main components of the iron ore powder are shown in Table 1 The content of 1 / 3 coking coal is 32.6wt%, and the 1 / 3 coking coal whose particle size is less than 0.075mm accounts for 90% of the total addition amount of 1 / 3 coking coal by volume percentage, and the chemical composition of 1 / 3 coking coal is shown in Table 2 The content of metallurgical lime is 4.1wt%, and the metallurgical lime whose particle size is less than 0.075mm accounts for 100% of the total amount of metallurgical lime added by volume percentage, and the effective flux of metallurgical lime is 85wt%.

[0022] Secondly, af...

Embodiment 2

[0028] Firstly, iron ore powder with a particle size less than 0.15mm, 1 / 3 coking coal, anthracite coal powder and metallurgical lime are evenly mixed to obtain the first material. Wherein, the content of the iron ore powder in the first material is 72.7wt%, and the iron ore powder whose particle size is less than 0.075mm accounts for 70% of the total amount of iron ore powder added by volume percentage, and the main components of the iron ore powder are shown in Table 1 The content of 1 / 3 coking coal is 24.0wt%, and the 1 / 3 coking coal whose particle size is less than 0.075mm accounts for 90% of the total addition amount of 1 / 3 coking coal by volume percentage, and the chemical composition of 1 / 3 coking coal is shown in Table 2 The content of anthracite coal powder is 2.3wt%, and the anthracite coal powder with particle size less than 0.075mm accounts for 90% of the total addition of anthracite coal powder by volume percentage. The chemical composition of anthracite coal powde...

Embodiment 3

[0035] Firstly, iron ore fines with particle sizes less than 0.15mm, 1 / 3 coking coal, weakly cohesive coal dust and metallurgical lime are uniformly mixed to obtain the first material. Wherein, the content of the iron ore powder in the first material is 78.6wt%, and the iron ore powder with a particle size less than 0.075mm accounts for 60% of the total amount of iron ore powder added by volume percentage, and the main components of the iron ore powder are shown in Table 1 Shown; The content of 1 / 3 coking coal is 18.3wt%, and the 1 / 3 coking coal with particle size less than 0.075mm accounts for 90% of the total addition amount of 1 / 3 coking coal by volume percentage, and the chemical composition of 1 / 3 coking coal is shown in Table 2 Shown; The content of weak caking coal pulverized coal is 2.0wt%, and the anthracite pulverized coal with particle size less than 0.075mm accounts for 90% of the total addition amount of anthracite coal pulverized by volume percentage, and the chem...

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 preparing iron ore hot-pressed carbon-containing pellets and iron-making raw materials. The preparation method includes the following steps: first, mix iron ore powder, coal powder, and flux evenly to obtain the first material, wherein , the content of iron ore powder in the first material is 60wt%~80wt%, the content of coal powder is 20wt%~40wt%, and the content of flux is 0wt%~10wt%; then, the first material is heated to 100°C~ After 300°C, it is hot-pressed into pellets to obtain the second material; finally, the second material is placed in a tunnel kiln or coal-based shaft furnace for heat treatment by carbonization to obtain hot-pressed carbonaceous iron ore. Pellets, wherein the heat treatment temperature is 800°C to 1100°C, the heat treatment time is 4h to 6h, and the atmosphere of the heat treatment is controlled to be a neutral or reducing atmosphere. The preparation method according to the invention can reduce energy consumption, simplify the process flow and improve production efficiency, can meet the energy consumption, cost and environmental protection requirements of steel production, and has broad industrial application prospects.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a method for preparing iron ore hot-pressed carbon-containing pellets. Background technique [0002] The theme of steel industry development is high efficiency, low carbon and green. As one of the most important units of steel production, the blast furnace produces more than 95wt% of pig iron in the world, and its energy consumption and CO 2 Emissions account for about 70% of the entire steel industry. The ironmaking system (including sintering, pelletizing, coking, and blast furnace) consumes the most energy and has a great impact on the environment (mainly CO 2 , dust, etc.). In addition, with the increase of steel production year by year, the demand for raw materials and fuels is also increasing. However, the amount of high-quality mineral resources is limited, and high-grade high-quality raw materials and fuels are exhausted. Therefore, the increase in the...

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): C22B1/245C22B1/212C22B1/214
Inventor 储满生柳政根王宏涛唐珏赵伟冯聪
Owner NORTHEASTERN UNIV LIAONING
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