Method for manufacturing fused magnesia and pig iron by using waste magnesia carbon bricks and rolled steel sheets

A technology of waste magnesia-carbon bricks and fused magnesia, which is applied in the field of refractory materials, can solve the problems of waste of high-quality iron-containing resources, and achieve the effects of improving raw material utilization efficiency, improving utilization efficiency, and reducing loss of magnesium resources

Active Publication Date: 2017-07-18
鞍山澳海耐火材料有限公司
View PDF4 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the recycling and utilization of iron oxide scale is mainly to return to the sintering process, resulting in the waste of a large amount of high-quality iron-containing 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

[0038] This embodiment provides a method for preparing fused magnesia and pig iron with waste magnesia carbon bricks and rolled steel sheets, which specifically includes the following steps:

[0039] 1) Remove the surface impurities of waste magnesia carbon bricks, and use a cone crusher or a roller crusher to crush waste magnesia carbon bricks into magnesia carbon brick powder, and the magnesia carbon brick powder with a particle size of ≤3mm accounts for the total mass fraction of magnesia carbon brick powder 96.5% of;

[0040] 2) The total iron mass fraction of the rolled steel sheet is 86.4%, and the water content is 3.45%; the rolled steel sheet is broken into rolled steel sheet powder, and the rolled steel sheet powder with a particle size ≤ 3mm accounts for 91.2% of the total mass fraction of the rolled steel sheet powder; according to magnesium carbon The carbon content of the brick powder and the oxygen content of the rolled steel sheet powder, according to the ratio ...

Embodiment 2

[0048] This embodiment provides a method for preparing fused magnesia and pig iron with waste magnesia carbon bricks and rolled steel sheets, which specifically includes the following steps:

[0049] 1) Remove the surface impurities of waste magnesia carbon bricks, and use a cone crusher or a roller crusher to crush waste magnesia carbon bricks into magnesia carbon brick powder, and the magnesia carbon brick powder with a particle size of ≤3mm accounts for the total mass fraction of magnesia carbon brick powder 98.5% of;

[0050] 2) The total iron mass fraction of the rolled steel sheet is 88.4%, and the water content is 3.05%; the rolled steel sheet is broken into rolled steel sheet powder, and the rolled steel sheet powder with a particle size ≤ 3mm accounts for 95.2% of the total mass fraction of the rolled steel sheet powder; according to magnesium carbon The carbon content of the brick powder and the oxygen content of the rolled steel sheet powder, according to the ratio ...

Embodiment 3

[0058] This embodiment provides a method for preparing fused magnesia and pig iron with waste magnesia carbon bricks and rolled steel sheets, which specifically includes the following steps:

[0059] 1) Remove the surface impurities of waste magnesia carbon bricks, and use a cone crusher or a roller crusher to crush waste magnesia carbon bricks into magnesia carbon brick powder, and the magnesia carbon brick powder with a particle size of ≤3mm accounts for the total mass fraction of magnesia carbon brick powder 99.5% of;

[0060] 2) The total iron mass fraction of the rolled steel sheet is 89.4%, and the water content is 2.45%; the rolled steel sheet is broken into rolled steel sheet powder, and the rolled steel sheet powder with a particle size ≤ 3mm accounts for 96.2% of the total mass fraction of the rolled steel sheet powder; according to magnesium carbon The carbon content of the brick powder and the oxygen content of the rolled steel sheet powder, according to the ratio ...

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
thicknessaaaaaaaaaa
particle sizeaaaaaaaaaa
thicknessaaaaaaaaaa
Login to view more

Abstract

The invention relates to a method for manufacturing fused magnesia and pig iron by using waste magnesia carbon bricks and rolled steel sheets. The method comprises the steps that (1) the waste magnesia carbon bricks and the rolled steel sheets are broken to form magnesia carbon brick powder and rolled steel sheet powder respectively; (2) the magnesia carbon brick powder is mixed with the rolled steel sheet powder after water is added to the magnesia carbon brick powder to enable the magnesia carbon brick powder to be wet; (3) adhesion agents are added to enable mixed materials to be pressed so as to form iron carbon magnesium pellets; (4) the iron carbon magnesium pellets containing water are dried; (5) the iron carbon magnesium pellets and magnesite are fed into a high-capacity magnesium electrofusion furnace in a layered material distribution mode, and the iron carbon magnesium pellets serve as the first layer of raw materials; (6) the iron carbon magnesium pellets are distributed in the central region of the magnesium electrofusion furnace, and the magnesite is distributed on the periphery of the iron carbon magnesium pellets, so that the second layer of raw materials is formed by the iron carbon magnesium pellets and the magnesite together; and (7) the step (5) and the step (6) are repeatedly conducted, various layers of raw materials are distributed in sequence, refining and precipitation are conducted, and finally the fused magnesia and the pig iron are obtained. The method for manufacturing the fused magnesia and the pig iron by using the waste magnesia carbon bricks and the rolled steel sheets achieves comprehensive and efficient utilization of the industrial waste.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, in particular to a method for preparing fused magnesia and pig iron by using waste magnesia-carbon bricks and rolled steel sheets. Background technique [0002] At present, the conventional method of producing fused magnesia is to process the raw magnesite ore into particles with a particle size of 5-40 mm, and then use an electric melting furnace for smelting production. Generally, a 1200 kVA electric furnace is used for smelting to produce fused magnesia. The production of 1 ton of fused magnesia consumes 3700-3800 degrees of electricity, consumes about 65kg of electrodes, and the production cycle is about 10 hours. After the smelting of fused magnesia is completed, let the melting machine cool down naturally. This process technology has many problems such as high energy consumption, long smelting cycle, and low utilization rate of raw materials. [0003] At present, research at h...

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): C22B1/242C21B11/10C04B2/10C04B35/66
CPCC04B2/102C04B35/66C21B11/10C22B1/242
Inventor 李春光罗旭东
Owner 鞍山澳海耐火材料有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap