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Anti-collapse tundish smearing material and preparation method thereof

A smear and tundish technology, which is applied in the field of anti-collapse tundish smear and its preparation, can solve problems such as affecting the production arrangement of a steel mill, collapse of the lining of the smear, affecting the quality of molten steel, etc. The effect of excellent construction performance

Active Publication Date: 2016-12-21
山东国茂冶金材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Since the smear material needs to be mixed with water to form a slurry during construction, the lining of the smear material is prone to collapse during baking, especially when the pouring time is short and the tundish turnover is fast in the production of special steel, sometimes it needs to be baked quickly, which is easier There is a collapse
Once a collapse occurs, it will directly affect the production arrangement of the steel mill and cause direct economic losses
And affect the quality of molten steel

Method used

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  • Anti-collapse tundish smearing material and preparation method thereof
  • Anti-collapse tundish smearing material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1) Formulation:

[0025] 3~1mm high iron sintered magnesia 25%, 1~0.5mm high iron sintered magnesia 20%, 0.5~0mm high iron sintered magnesia 20%, 200 mesh 92 sintered magnesia 30%, sodium tripolyphosphate 0.5%, sodium pyrophosphate 0.5%, Guangxi white clay 1%, silica powder 1%, ethylene glycol 0.15%, yellow dextrin 0.4%, metal aluminum powder 0.01%, paper fiber 1.5%, explosion-proof fiber 0.1%.

[0026] 2) Preparation method:

[0027] (1) Sodium tripolyphosphate, sodium pyrophosphate, Guangxi white clay, silicon micropowder, yellow dextrin, metal aluminum powder, etc. weighed according to the formula are added to a small mixer and mixed for 20 to 30 minutes. The lined woven bag is called mixed powder.

[0028] (2) Weigh 3~1mm, 1~0.5mm, 0.5~0mm magnesia raw materials according to the formula, add them into the forced mixer and stir for about 1 minute. Then add the weighed liquid ethylene glycol and mix for about 2 minutes, and mix well so that the liquid ethylene glyc...

Embodiment 2

[0030] 1) Formulation:

[0031] 30% of 3-1mm high-speed iron sintered magnesia, 20% of 1-0.5mm high-speed iron sintered magnesia, 20% of 0.5-0mm high-speed iron sintered magnesia, 24% of 200 mesh 92 sintered magnesia, 0.25% of sodium tripolyphosphate, sodium pyrophosphate 0.25%, Guangxi white clay 3%, silica powder 1%, ethylene glycol 0.1%, yellow dextrin 0.5%, metal aluminum powder 0.015%, paper fiber 1%, explosion-proof fiber 0.1%.

[0032] 2) Preparation method:

[0033] (1) Sodium tripolyphosphate, sodium pyrophosphate, Guangxi white clay, silicon micropowder, yellow dextrin, metal aluminum powder, etc. weighed according to the formula are added to a small mixer and mixed for 20 to 30 minutes. The lined woven bag is called mixed powder.

[0034] (2) Weigh 3~1mm, 1~0.5mm, 0.5~0mm magnesia raw materials according to the formula, add them into the forced mixer and stir for about 1 minute. Then add the weighed liquid ethylene glycol and mix for about 2 minutes, and mix well...

Embodiment 3

[0036] 1) Formulation:

[0037] 3~1mm high iron sintered magnesia 23%, 1~0.5mm high iron sintered magnesia 22%, 0.5~0mm high iron sintered magnesia 18%, 200 mesh fused magnesia 31%, sodium tripolyphosphate 0.6%, Guangxi white clay 1%, silicon micropowder 2%, ethylene glycol 0.2%, yellow dextrin 0.4%, metal aluminum powder 0.01%, paper fiber 1.2%, explosion-proof fiber 0.15%.

[0038] 2) Preparation method:

[0039] (1) Sodium tripolyphosphate, Guangxi white clay, silicon micropowder, yellow dextrin, metal aluminum powder, etc. weighed according to the formula are added to a small mixer and mixed for 20 to 30 minutes, and the mixed material is loaded into a plastic-lined braided It is reserved in the bag and is called mixed powder.

[0040] (2) Weigh 3~1mm, 1~0.5mm, 0.5~0mm magnesia raw materials according to the formula, add them into the forced mixer and stir for about 1 minute. Then add the weighed liquid ethylene glycol and mix for about 2 minutes, and mix well so that t...

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Abstract

The invention relates to an anti-collapse tundish smearing material and a preparation method thereof, and belongs to the technical field of unshaped refractory material; the anti-collapse tundish smearing material is characterized by being prepared from the following raw materials by the weight percentage: 20-30% of high-iron sintered magnesia with the particle size of 3-1 mm, 18-25% of high-iron sintered magnesia with the particle size of 1-0.5 mm, 18-25% of high-iron sintered magnesia with the particle size of less than or equal to 0.5 mm, 0-35% of 200-mesh 92 sintered magnesia, 0-35% of 200-mesh fused magnesite, 0-1% of sodium tripolyphosphate, 0-1% of sodium pyrophosphate, 1-4% of Guangxi white clay, 0-2% of a silica micro-powder, 0.1-0.4% of ethylene glycol, 0.2-0.5% of canary dextrin, 0.01-0.05% of a metal aluminum powder, 1-2.2% of paper fibers, and 0-0.2% of explosion-proof fibers, wherein the total percentage of the raw materials is 100%. The smearing material has the advantages of excellent construction performance, good water retention, no cracks during curing, high low-temperature strength, no collapse and no cracking during quick baking, and good use performance.

Description

technical field [0001] The invention relates to an anti-collapse tundish coating material and a preparation method thereof, belonging to the technical field of monolithic refractory materials. Background technique [0002] At present, with the continuous development of steelmaking and continuous casting technology, the life of the refractory lining in the tundish is also being extended, and the lining refractory is gradually replaced by long-life dry materials. However, for the production of special steel, the life of the tundish lining is not as long as possible. Because the longer the tundish lining is used, the more serious the corrosion of refractory materials is, and the more eroded refractory materials are more likely to pollute the molten steel and affect the cleanliness of the molten steel. In this way, the smear has obvious advantages, which is why many special steel factories still use smear for the tundish lining. Compared with dry materials, smear materials are...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/043
CPCC04B35/043C04B35/66C04B2235/3206C04B2235/3418C04B2235/349C04B2235/402C04B2235/5212C04B2235/96
Inventor 张文国李乃动孙晓孟凡祥梁绪正张滨李宪奎李华君
Owner 山东国茂冶金材料有限公司
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