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

A method for producing sponge iron by utilizing converter slag iron oxide

A technology of iron oxide and converter slag, applied in the field of metallurgy, can solve the problems of no recycling, waste of resources, etc., and achieve the effects of sustainable development, reduction of comprehensive cost, and improvement of recycling rate

Active Publication Date: 2022-03-22
ANGANG STEEL CO LTD
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the slag containing iron oxides has not been recycled, resulting in a waste of resources

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

[0045] A kind of method utilizing converter slag iron oxide to produce sponge iron is as follows:

[0046] 1. Raw material handling

[0047] 1) The converter slag is crushed so that its particle size is not greater than 10mm, and the crushed converter slag is magnetically separated through the control of the magnetic force of the magnetic separator to separate the iron element (granular iron).

[0048] 2) Grinding the remaining slag particles, the particle size of the ground slag powder is required to be 150-300 mesh, and performing a second magnetic separation on the ground slag powder to separate the iron oxide powder from the slag powder.

[0049] 3) Coke powder processing, crushing block coke, the crushing particle size is required to be 0.5-5mm, and the pitch coke is crushed to 0.05-2mm.

[0050] 2. Mixing and pressing balls

[0051] 1) The raw materials are proportioned as follows by weight: iron oxide powder: 76%; coke powder: 20%; pitch coke: 4%.

[0052] 2) Perform...

Embodiment 2

[0063]A kind of method utilizing converter slag iron oxide to produce sponge iron is as follows:

[0064] 1 Raw material handling

[0065] 1) The converter slag is crushed so that its particle size is not greater than 10mm, and the crushed converter slag is magnetically separated through the control of the magnetic force of the magnetic separator to separate the iron element (granular iron).

[0066] 2) Grinding the remaining slag particles, the particle size of the ground slag powder is required to be 150-300 mesh, and performing a second magnetic separation on the ground slag powder to separate the iron oxide powder from the slag powder.

[0067] 3) Coke powder processing, crushing block coke, the crushing particle size is required to be 0.5-5mm, and the pitch coke is crushed to 0.05-2mm.

[0068] 2. Mixing and pressing balls

[0069] 1) Carry out the following proportioning by weight of each raw material:

[0070] Iron oxide powder: 80%

[0071] Coke powder: 15%

[007...

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 size (mesh)aaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

The invention relates to a method for producing sponge iron by using converter slag iron oxides. The iron oxide powder in the converter slag is sorted out and coke powder and pitch coke are made into material balls, and the material balls are uniformly arranged in a vacuum induction heating furnace. A layer of coke with a block equivalent diameter of 10-30mm is arranged every 200-500mm ball layer, the thickness of the coke layer is 50-100mm, and the total thickness of the material layer in the vacuum induction heating furnace is controlled at 1000-2000mm; A corundum vent tube with small holes in the side wall is inserted into the material; it is smelted into sponge iron in a heating furnace. The invention improves the recycling rate of the converter slag, improves the environment of the iron and steel enterprises, and can further reduce the comprehensive cost of the iron and steel enterprises, which is beneficial to the sustainable development of the iron and steel enterprises.

Description

technical field [0001] The invention belongs to the field of metallurgy, in particular to a method for producing sponge iron by using converter slag iron oxide. Background technique [0002] With the rapid development of my country's metallurgical industry, the output of iron and steel has increased steadily, and the resources of converter slag accompanying it have also increased. The comprehensive utilization rate of steel slag is low. Especially the utilization rate of converter steel slag is only 10%. The treatment and utilization level of converter steel slag directly affects the overall utilization rate of steel slag in my country. Steel slag is a by-product of steelmaking production. The comprehensive utilization of steel slag can not only eliminate environmental pollution, but also create huge economic benefits, which is an effective way for sustainable development. At present, the comprehensive recycling of steel slag is mainly to recover the elemental iron (granu...

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): C22B1/248C22B1/245C21B13/12
CPCC22B1/2406C22B1/248C22B1/245C21B13/12C21B13/0066Y02P10/20
Inventor 李德军廖相巍于赋志黄玉平许孟春康伟吕春风张维维王丽娟
Owner ANGANG STEEL CO LTD