Unlock instant, AI-driven research and patent intelligence for your innovation.

Method and system for carbon thermal reduction by using waste heat of iron-containing melt

A melt and waste heat technology, applied in the field of metallurgy, can solve problems such as ineffective use of heat, unusable powder materials, energy waste, etc., and achieve the effects of maximizing utilization, broadening raw material sources, and reducing production costs

Active Publication Date: 2015-01-28
HONGYANG METALLURGICAL ENG TECH CO LTD
View PDF3 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The temperature of molten iron is around 1500°C, and it carries a lot of physical heat. However, the heat has not been effectively used during the cooling process, resulting in a waste of energy.
[0004] In the environment where the country pays more and more attention to sustainable development, environmental protection and green manufacturing, and under the conditions of increasingly fierce social competition, in order to promote the healthy development of metallurgical enterprises, the problems of high energy consumption, high cost and unusable powder waiting to be solved

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 and system for carbon thermal reduction by using waste heat of iron-containing melt
  • Method and system for carbon thermal reduction by using waste heat of iron-containing melt
  • Method and system for carbon thermal reduction by using waste heat of iron-containing melt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0085] Copper smelting slag powder (TFe greater than 35wt%), semi-coke powder and flux are mixed to obtain a mixed powder, a part of the mixed powder is subjected to molding treatment to obtain a mixed pellet, and the mixed pellet is dried to obtain After drying the mixed pellets, sieve the dried mixed pellets to obtain the over-sieve mixed pellets and the under-sieved mixed powder, and carry out the reduction reaction of the over-sieved mixed pellets in a rotary hearth furnace to obtain metal Metallized pellets are melted in a gas-fired melting furnace to obtain iron-containing melt and slag, and the other part of the mixed powder and the mixed powder under the sieve are collected and injected into the blowing device. In the powder blowing method, the mixed powder is sprayed when the output of the iron-containing melt accounts for one-third of the ladle, so that the iron oxide and semi-coke in the mixed powder undergo a reduction reaction using the waste heat of the iron-conta...

Embodiment 2

[0087] Copper smelting slag powder (TFe greater than 35wt%), semi-coke powder and flux are mixed to obtain a mixed powder, a part of the mixed powder is subjected to molding treatment to obtain a mixed pellet, and the mixed pellet is dried to obtain After drying the mixed pellets, sieve the dried mixed pellets to obtain the over-sieve mixed pellets and the under-sieved mixed powder, and carry out the reduction reaction of the over-sieved mixed pellets in a rotary hearth furnace to obtain metal Metallized pellets are melted in a gas-fired melting furnace to obtain iron-containing melt and slag, and the other part of the mixed powder and the mixed powder under the sieve are collected and injected into the blowing device. In the powder blowing method, the mixed powder is blown while discharging the iron-containing melt, so that the iron oxide and semi-coke in the mixed powder can undergo a reduction reaction using the waste heat of the iron-containing melt, wherein the quality of ...

Embodiment 3

[0089] Mixing vanadium-titanium-magnetite powder (TFe greater than 56wt%), coke powder and flux to obtain a mixed powder, molding a part of the mixed powder to obtain a mixed pellet, and drying the mixed pellet , to obtain the dried mixed pellets, sieve the dried mixed pellets to obtain the over-sieved mixed pellets and under-sieved mixed powder, and carry out the reduction reaction of the over-sieved mixed pellets in a rotary hearth furnace, Metallized pellets are obtained, and the metallized pellets are melted in an electric furnace to obtain iron-containing melt and slag. The other part of the mixed powder and the mixed powder under the sieve are collected and injected into the injection device, and the injection In the powder method, the mixed powder is sprayed when the output of the iron-containing melt accounts for one-third of the ladle, so that the iron oxide and coke powder in the mixed powder can undergo a reduction reaction using the waste heat of the iron-containing...

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
Login to View More

Abstract

The invention discloses a method and a system for carbon thermal reduction by using waste heat of an iron-containing melt. The method comprises the following steps: (1) mixing iron-containing mineral powder, carbon raw material powder and a fluxing agent; (2) moulding part of the mixed power to obtain mixed pellets; (3) drying the mixed pellets; (4) screening the dried mixed pellets; (5) carrying out reduction reaction on the mixed pellets to obtain metalized pellets; (6) melting the metalized pellets so as to obtain an iron-containing melt and slag; and (7) contacting the other part of the mixed powder and minus sieve mixed powder with the iron-containing melt, wherein reduction reaction on the mixed powder is carried out by using waste heat of the iron-containing melt. According to the method disclosed by the invention, waste heat of the iron-containing melt obtained by reduction reaction on the iron-containing ores and the carbon raw material is fully utilized and the powder is reasonably utilized, so that maximum utilization of resources is achieved while the energy consumption is reduced.

Description

technical field [0001] The invention belongs to the field of metallurgy, in particular, the invention relates to a method and system for carbothermal reduction using waste heat of iron-containing melt. Background technique [0002] With the development of my country's iron and steel industry, the traditional blast furnace ironmaking process is becoming more and more mature, but it needs to face environmental and energy challenges, and the shortcomings of long process flow, high energy consumption and heavy pollution hinder its development. At the same time, some non-blast furnace ironmaking processes with short process and low production cost have received widespread attention, and have also achieved rapid development in recent years, such as coal-based direct reduction ironmaking process. The remarkable feature of this process is that it can replace coke. Coal powder is used as a reducing agent, the process is short and the efficiency is high. [0003] In the direct reduct...

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): C21B13/00
Inventor 吴道洪任中山薛逊曹志成
Owner HONGYANG METALLURGICAL ENG TECH CO LTD