Aluminum-magnesium-zirconium brick for RH impregnating pipe and circulating pipe and preparation method thereof

A technology of aluminum-magnesium-zirconium bricks and dipping tubes, which is applied in the field of refractory materials, can solve problems such as damage to dipping tubes, achieve the effects of improving slag resistance, green strength and bulk density, and improving microstructure

Active Publication Date: 2013-07-31
郑州市裕丰耐火材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Severe damage to the dipping tube due to factors such as high-temperature molten steel erosion, erosion, temperature change, and thermal shock damage caused by gas injection

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1: The raw materials and proportions for the preparation of aluminum-magnesium-zirconium bricks are specifically as follows: 25 kg of corundum particles, 35 kg of fused magnesia particles, 15 kg of corundum fine powder, 10 kg of a-alumina fine powder, Zirconia fine powder 4.85 kg, fused magnesia fine powder 5 kg, silica micropowder 1 kg, activated alumina 4%, sodium tripolyphosphate 0.1 kg, citric acid 0.05 kg. The corundum particles are high alumina corundum particles with an alumina content greater than 95%. The corundum fine powder is a high alumina corundum fine powder with an alumina content greater than 95%. The silica micropowder is 92 silica micropowder.

[0030] Put high-alumina corundum (alumina content greater than 95%) particles and fused magnesia particles into a mixer for 2-3 minutes and dry mix; high-alumina corundum (alumina content greater than 95%) fine powder, a-alumina fine powder , zirconia fine powder, fused magnesia fine powder, silica f...

Embodiment 2

[0033]Example 2: The raw materials and proportions for the preparation of aluminum-magnesium-zirconium bricks are specifically as follows: 45 kg of corundum particles, 15 kg of fused magnesia particles, 15 kg of corundum fine powder, 10 kg of a-alumina fine powder, Zirconia fine powder 4.85 kg, fused magnesia fine powder 5 kg, silica micropowder 1 kg, activated alumina 4%, water reducing agent 0.1 kg, dispersant 0.05 kg. The corundum particles are fused white corundum particles, the corundum fine powder is fused white corundum fine powder, the water reducer is sodium hexametaphosphate, and the dispersant is tartaric acid.

[0034] Put the fused white corundum particles and fused magnesia particles into the mixer and dry mix them for 2-3 minutes; put the fused white corundum fine powder, a-alumina fine powder, zirconia fine powder, fused magnesia fine powder, Silica powder, activated alumina, sodium hexametaphosphate and tartaric acid are pre-mixed in a pre-mixer for 25-30 minu...

Embodiment 3

[0038] Example 3: The raw materials and proportions for the preparation of aluminum-magnesium-zirconium bricks are specifically as follows: 32 kg of corundum particles, 28 kg of fused magnesia particles, 15 kg of corundum fine powder, 10 kg of a-alumina fine powder, Zirconia fine powder 4.85 kg, fused magnesia fine powder 5 kg, silica micropowder 1 kg, activated alumina 4%, water reducing agent 0.1 kg, dispersant 0.05 kg. The corundum particles are tabular corundum particles, the corundum fine powder is tabular corundum fine powder, the water reducer is calcium lignosulfonate, and the dispersant is oxalic acid.

[0039] Put the plate-shaped corundum particles and fused magnesia particles into the mixer and dry mix them for 2-3 minutes; put the plate-shaped corundum fine powder, a-alumina fine powder, zirconia fine powder, fused magnesia fine Microsilica powder, activated alumina, calcium lignosulfonate and oxalic acid are pre-mixed in a pre-mixer for 25-30 minutes; dry-mixed ...

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Abstract

The invention relates to an aluminum-magnesium-zirconium brick for an RH impregnating pipe and a circulating pipe and a preparation method thereof, and the aluminum-magnesium-zirconium brick is used for an inner pipe of the RH impregnating pipe and the circulating pipe. The aluminum-magnesium-zirconium brick is prepared from the following raw materials in percentage by weight: 25-45% of corundum particles, 15-35% of fused magnesia particles, 15% of corundum fine powder, 10% of alpha-alumina micropowder, 4.85% of zirconia fine powder, 5% of fused magnesia fine powder, 1% of silicon dioxide micropowder, 4% of activated alumina, 0.1% of water reducing agent and 0.05% of dispersant. The aluminum-magnesium-zirconium brick has the advantages of high green strength, no need of sintering, good thermal shock stability and strong resistance to acidic and basic fused slag corrosion.

Description

technical field [0001] The invention relates to a refractory material, in particular to an aluminum-magnesium-zirconium brick for RH dipping pipes and circulation pipes suitable for the inner pipe and circulation pipe of the RH dipping pipe and a preparation method thereof. Background technique [0002] The full name of RH refining is RH vacuum circulation degassing refining method, which was invented by the Germans in 1959, where RH is the first letter of the two German manufacturers that adopted RH refining technology at that time. The application of vacuum technology in steelmaking began in 1952. At that time, when people produced silicon steel with a silicon content of about 2%, slag often appeared during the pouring process. After various tests, it was finally found that hydrogen and Nitrogen is the main reason for the generation of slag that cannot be poured or produced waste products after rolling. Then various vacuum refining technologies began to appear, such as vac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66
Inventor 柳军张会敏
Owner 郑州市裕丰耐火材料有限公司
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