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

Method for reducing burnup of iron ore powder composite agglomerated solid

A technology of composite agglomeration and iron ore powder, which is applied in the field of iron and steel metallurgy, can solve problems such as the difficulty in the development of the furnace charge preparation process, earth damage, fine particle size, etc., and achieve the effects of increased output, reduced emissions, and improved drum strength

Inactive Publication Date: 2015-06-03
CENT SOUTH UNIV
View PDF0 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, with the continuous consumption of high-quality iron ore resources, iron ore resources present the characteristics of wide sources, various types, fine particle size, and increasingly complex performance, which brings great benefits to the development of charge preparation processes (mainly sintering and pelletizing). difficulty
In addition, the development model of exchanging environmental pollution for rapid industrialization has caused serious damage to the earth on which human beings depend.

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 reducing burnup of iron ore powder composite agglomerated solid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Add 2% binder (bentonite or other) to the fine-grained iron concentrate accounting for 40% of the sintering raw material to prepare pellets of 10~12mm, and mix the rest of the raw materials (iron ore powder, solid fuel, flux and returned ore) to prepare Into the base material. Among them, the solid fuel content in the base material is 6.7% (the average fuel content of the sinter mixture is 4.0%). The sintering mixture is divided into 6 layers and distributed in the sintering cup. From top to bottom, the weight of pellets in each layer accounts for the percentage of the weight of the layer of mixture: 12%, 25.2%, 40.8%, 48%, 52.8% and 48%, the material layer height is 800 mm, the sintering suction negative pressure is 9kPa for sintering, and the utilization coefficient is 1.67 t m -2 h -1 , yield rate 79.55%, drum index 66.23%, solid fuel consumption 53.09 kg·t -1 index of.

Embodiment 2

[0023] Add 2% binder (bentonite or other) to the fine-grained iron concentrate accounting for 30% of the sintering raw material to prepare pellets of 10~12mm, and mix the rest of the raw materials (iron ore powder, solid fuel, flux and returned ore) Into the base material. Among them, the solid fuel content in the base material is 5.71% (the average fuel content of the sinter mixture is 4.0%). The sintering mixture is divided into 6 layers and distributed in the sintering cup. From top to bottom, the weight of pellets in each layer accounts for the percentage of the weight of the layer of mixture: 12%, 25.2%, 40.8%, 48%, 52.8% and 48%, the material layer height is 800 mm, the sintering suction negative pressure is 9kPa for sintering, and the utilization coefficient is 1.56 t m -2 h -1 , yield rate 77.89%, drum index 65.38%, solid fuel consumption 53.88 kg·t -1 index of.

Embodiment 3

[0025] Add 2% binder (bentonite or other) to the fine-grained iron concentrate accounting for 40% of the sintering raw material to prepare pellets of 10~12mm, and mix the rest of the raw materials (iron ore powder, solid fuel, flux and returned ore) to prepare Into the base material. Among them, the solid fuel content in the base material is 6.7% (the average fuel content of the sinter mixture is 4.0%). The sintering mixture is divided into 6 layers and distributed in the sintering cup. From top to bottom, the weight of pellets in each layer accounts for the percentage of the weight of the layer of mixture: 24%, 36%, 36%, 48%, 52.8% and 43.2%, the material layer height is 800 mm, the sintering suction negative pressure is 9kPa for sintering, and the utilization coefficient is 1.61 t m -2 h -1 , yield rate 78.57%, drum index 65.71%, solid fuel consumption 53.25 kg·t -1 index of.

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
heightaaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for reducing burnup of an iron ore powder composite agglomerated solid. An iron ore powder composite agglomeration material comprises a pellet material and a matrix material, wherein the pellet material does not contain fuel, and the matrix material contains solid fuel; the distribution of the matrix material along a material layer is regulated to be matched with a distribution rule of utilizable heat storage capacity at different heights of the material layer, and the content of the solid fuel in the matrix material is controlled, so that the matrix material has sufficient heat for liquid phase solidification, and the pellet material is adequately subjected to solid phase solidification by virtue of stored heat of the material layer. According to the method, the stored heat of the composite agglomeration material layer is adequately utilized, so that the consumption of the solid fuel is reduced, and the rate of finished products and the product quality of the composite agglomeration are improved. Compared with a normal composite agglomeration process, the method has the advantages that the consumption of the solid fuel is reduced by 6.2%-12.6%, the yield is increased by more than or equal to 2%-5%, and the drum strength of the product is improved by 3%-5%; by further producing blast furnace materials by virtue of operation regulations of high material layer and low negative pressure, the yield of the composite agglomeration is increased by 10%-20%, and the electricity consumption of an exhaust fan is decreased by 10% or more.

Description

technical field [0001] The invention relates to the technical field of iron and steel metallurgy, in particular to a method capable of reducing the solid fuel consumption of composite agglomeration of iron ore powder. Background technique [0002] The composite agglomeration process of iron ore powder is one of the outstanding achievements in the development of iron ore agglomeration technology in the past ten years. The process has the characteristics of rationally utilizing various iron-containing resources, overcoming the poor gas permeability of the material layer during the sintering of fine-grained iron concentrate and the severe segregation of sinter and pellets in the blast furnace, and significantly improving the quality of composite agglomeration. In the composite agglomeration process, in order to ensure that the composite agglomerate product has good consolidation strength, it is usually necessary to increase the fuel consumption of the base material, and add a s...

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 Applications(China)
IPC IPC(8): C22B1/16
CPCC22B1/16
Inventor 李光辉姜涛张元波余正伟石军郭宇峰范晓慧杨永斌李骞陈许玲彭志伟黄柱成张鑫刘臣
Owner CENT SOUTH UNIV
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