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Slag adhesion resistant gunning refractory for converter

An anti-stick slag and gunning material technology is applied in the field of anti-stick slag gunning materials for preventing slag sticking in converters, and can solve the problems of poor slag isolation effect and difficulty in cleaning converter slag sticking, so as to improve the peeling effect and cleaning degree, meet the requirements of construction performance, and improve the effect of fire resistance

Inactive Publication Date: 2010-10-20
WUHAN IRON & STEEL (GROUP) CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims at the problems existing in the prior art that the cleaning of converter sticky slag is difficult and the effect of sticky slag isolation is not outstanding, and further provides a converter anti-sticky slag spraying material with low price, convenient preparation and simple use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Prepare the converter anti-sticking slag gunning material:

[0043] The optimal weight percentage of its raw materials is: magnesia-carbon refractory waste brick regenerated aggregate is 42-45%, of which, the particle size is 3-1mm and 1-0.15mm, which are 30% and 70% respectively; the sintered magnesia particle size is 1~0.15mm, accounting for 5~6%; fused magnesia is 24~25%, of which 180 mesh and 325 mesh are 50% and 50% respectively; silicon carbide is 7~8%, flake graphite is 3.5%~4, soil 4-4.5% of graphite, 2% of alumina cement, 2% of silica powder, α-Al 2 o 3 Micropowder 2%, sodium hexametaphosphate 4%; and additionally: calcium lignosulfonate 0.4%, polypropylene fiber 0.15%. Put the above raw materials into the mixer and stir evenly to get the required gunning material, and pack it into bags.

Embodiment 2

[0045] Prepare the converter anti-sticking slag gunning material:

[0046] The optimal weight percentage of the raw material is 38-41% of the regenerated aggregate of magnesia-carbon refractory waste bricks, of which, the particle size is 3-1mm and 1-0.15mm, which are 35% and 65% respectively; the sintered magnesia particle size is 1- 0.15mm, accounting for 10-11%; fused magnesia is 20-21%, of which 180 mesh and 325 mesh are 50% and 50% respectively; silicon carbide 6-7%, flake graphite 4.5-5.5%, earthy graphite 5-6%, bauxite cement 3%, silica powder 3%, α-Al 2 o 3 Micropowder 3%, sodium hexametaphosphate 3%; and additionally: calcium lignosulfonate 0.3%, polypropylene fiber 0.1%. Put the above raw materials into the mixer and stir evenly to get the required gunning material, and pack it into bags.

Embodiment 3

[0048] Prepare the converter anti-sticking slag gunning material:

[0049] The optimal weight percentage of its raw materials is: magnesia-carbon refractory waste brick regenerated aggregate is 35-36%, of which, the particle size is 3-1mm and 1-0.15mm, which are 35% and 65% respectively; the sintered magnesia particle size is 1~0.15mm, accounting for 14~16%; fused magnesia 18~20%, of which 180 mesh and 325 mesh are 50% and 50% respectively; silicon carbide 5~6%, flake graphite 4.5~5.5%, soil 6.5-7.5% graphite, 1% bauxite cement, 1% silica powder, α-Al 2 o 3 Micropowder 1%, sodium hexametaphosphate 3%; and additionally: calcium lignosulfonate 0.2%, polypropylene fiber 0.05%. Put the above raw materials into the mixer and stir evenly to get the required gunning material, and pack it into bags.

[0050] Through laboratory experiments, the converter anti-sticking slag gunning materials in the above three embodiments can form a complete and uniform anti-sticking slag isolation g...

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Abstract

The invention provides a slag adhesion resistant gunning refractory for a converter. The gunning refractory comprises the following components in percentage by weight: 35 to 45 percent of magnesia carbon refractory crushed brick recycled aggregate, 5 to 16 percent of magnesite clinker, 18 to 25 percent of fused magnesite, 5 to 8 percent of silicon carbide, 8 to 13 percent of graphite, 1 to 3 percent of alumina cement, 1 to 3 percent of silicon micro powder, 1 to 3 percent of alpha-Al2O3 micro powder, and 3 to 4 percent of sodium hexametahposphate. On the basis of the raw materials, 0.2 to 0.4 percent of calcium lignosulfonate and 0.05 to 0.15 percent of polypropylene fiber are added; the magnesia carbon refractory crushed brick recycled aggregate has two granularities, namely comprises 30 to 40 weight percent of aggregate with the granularity of 3 to 1 mm and 60 to 70 weight percent of aggregate with the granularity of 1 to 0.15mm; the granularity of the magnesite clinker is 1 to 0.15mm; the fused magnesite has two granularities, namely comprises 40 to 60 percent weight percent of fused magnesite with the granularity of 180 meshes and 40 to 60 weight percent of fused magnesite with the granularity of 325 meshes; and the granularity of the silicon carbide is 180 meshes.

Description

technical field [0001] The invention relates to an anti-sticking slag gunning material for a converter, in particular to an anti-sticking slag gunning material for preventing converter slag sticking. Background technique [0002] In the process of converter smelting, the phenomenon of splashing and overflowing steel often occurs, resulting in slag sticking to the furnace mouth and water tank. Due to the existence of sticky slag, the furnace mouth, water tank and water-cooled fume hood will collide and rub when pulling carbon or putting steel in the shaking furnace, causing water leakage from furnace mouth, water tank and water-cooling fume hood to occur from time to time, which directly affects the smooth progress of production . At present, the sticky slag of the converter is generally treated by manual cleaning. Due to the high bonding strength of sticky slag and the harsh operating environment in front of the furnace, the efficiency of slag removal is low, the cleaning ...

Claims

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Application Information

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IPC IPC(8): C04B35/66
Inventor 欧阳德刚李具中吴杰朱善合刘路长罗巍刘晓卿罗安智张爱平胡清明
Owner WUHAN IRON & STEEL (GROUP) CORP
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