Machined carbon-free corundum spinel brick for ladles and preparation method thereof

A technology of spinel brick and carbon corundum, which is applied in the field of machine-pressed carbon-free corundum spinel brick for ladle and its preparation, can solve the problems of poor thermal shock stability, low strength at room temperature, molten steel pollution, etc., and achieve good cementation The effect of low thermal conductivity, low thermal conductivity and convenient operation

Inactive Publication Date: 2015-04-01
武钢集团有限公司
View PDF3 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, machine-pressed carbon-free bricks for ladles can be combined with organic systems and inorganic systems, but there is generally a problem of poor thermal shock stability.
The machine-pressed carbon-free brick of the organic combination system still contains a certain amount of carbon, which will pollute the molten steel; the carbon-free brick produced by inorganic combination such as sulfate, halogen salt, phosphate, water glass, etc. Harmful impurities, disadvantages of polluting molten steel

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
  • Machined carbon-free corundum spinel brick for ladles and preparation method thereof
  • Machined carbon-free corundum spinel brick for ladles and preparation method thereof
  • Machined carbon-free corundum spinel brick for ladles and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Machine-pressed carbon-free corundum spinel bricks for ladle, calculated by weight percentage, its raw material ratio is as follows:

[0023]

[0024]

[0025] After mixing the solid raw materials in proportion, add water, mix and grind them with a mixer, then put them into a brick press for molding, heat treatment at 200°C for 24 hours, and finally select, inspect, pack, and put them into storage to produce ladle machines. Pressed carbon-free corundum spinel bricks.

Embodiment 2

[0027] Machine-pressed carbon-free corundum spinel bricks for ladle, calculated by weight percentage, its composition ratio is as follows:

[0028]

[0029] After mixing the solid raw materials in proportion, add water, mix and grind them in a mixer mill, then put them into a brick press for molding, heat treatment at 220°C for 20 hours, and finally select, inspect, pack, and put them into storage to produce ladle machines. Pressed carbon-free corundum spinel bricks.

Embodiment 3

[0031] Machine-pressed carbon-free corundum spinel bricks for ladle, calculated by weight percentage, its composition ratio is as follows:

[0032]

[0033]

[0034] After mixing the solid raw materials in proportion, add water, mix and grind them with a mixer, then put them into a brick press for molding, heat treatment at 170°C for 30 hours, and finally select, inspect, pack, and put them into storage to produce ladle machines. Pressed carbon-free corundum spinel bricks.

[0035] The main physical and chemical indicators of the machine-pressed carbon-free corundum spinel brick product obtained in Examples 1 to 3 of the present invention:

[0036] Bulk density after baking at 200℃ (200℃×24h) ≥ 3.0g / cm;

[0037] Apparent porosity (200℃×24h)≤12%;

[0038] Compressive strength (200℃×24h)≥50MPa;

[0039] Linear change rate (1600℃×3h) 0~1%.

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
particle sizeaaaaaaaaaa
Login to view more

Abstract

The invention discloses a machined carbon-free corundum spinel brick for ladles, which comprises a solid raw material and water. The solid raw material comprises the following components in percentage by weight: 55-69% of microporous corundum, 15-25% of microporous corundum powder, 2-7% of rho-Al2O3 micropowder, 10-20% of synthetic spinel powder and 3-7% of magnesium aluminate. Water accounts for 1-3 wt% of the total solid raw material. The preparation method comprises the following steps: proportionally preparing the solid raw material, adding water, milling, forming in a brick press, and carrying out heat treatment at 150-250 DEG C for 12-36 hours. The machined carbon-free corundum spinel brick for ladles can not increase the carbon content in the molten steel or introduce harmful impurity component in the smelting process, and can reduce the temperature drop of the molten steel and perform the thermal-insulation function due to low thermal conductivity. The spinel brick has the characteristics of no pollution, high normal-temperature / high-temperature strength and high thermal shock stability, and can satisfy the production demands for low-carbon and ultralow-carbon steel.

Description

technical field [0001] The invention relates to a machine-pressed carbon-free lining brick for a ladle, in particular to a machine-pressed carbon-free corundum spinel brick for a ladle and a preparation method thereof. Background technique [0002] With the rapid development of my country's industry, high-purity steels such as low-carbon steel and ultra-low-carbon steel are widely used in automobiles, home appliances, electric power and other industries due to their excellent performance. Smelting high-purity steel has become a large-scale steel enterprise. main direction of development. Ladle metallurgy is one of the most critical processes in the steelmaking process, and its cleanliness is particularly important. Carbon-containing materials used in ladles will cause carbonation of molten steel and cause greater pollution. Therefore, it is necessary to develop non-polluting, long-life ladles. Carbon-free refractories to meet the smelting requirements of low-carbon steel, ul...

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): C04B35/66
Inventor 蔡长秀田先明雷中兴徐志华秦常杰姚亚双
Owner 武钢集团有限公司
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