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Split combination type slag dam for tundish as well as preparation and use method of slag dam

A slag retaining wall, combined technology, applied in the direction of manufacturing tools, casting equipment, metal processing equipment, etc., can solve the problems of stress cracking, difficult to match high temperature thermal expansion coefficients, affecting life, etc., to achieve convenient preparation and use, low cost, Create convenient effects

Active Publication Date: 2019-11-15
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

The biggest problem with this integrated slag retaining wall is that the high temperature thermal expansion coefficients of the two materials are difficult to match, and it is easy to cause stress cracking and affect the service life during use.

Method used

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  • Split combination type slag dam for tundish as well as preparation and use method of slag dam
  • Split combination type slag dam for tundish as well as preparation and use method of slag dam

Examples

Experimental program
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Effect test

Embodiment 1

[0034] The main components of magnesium-aluminum-silicon on the upper slag line of the slag retaining wall for the split combined type tundish described in this embodiment are: MgO 50.0%, Al 2 o 3 36.5%, SiO 2 13.5%; specific raw material composition weight percentages are: mid-range sintered magnesia 31%, 96 fused magnesia 22%, bauxite clinker 43%, SiO 2 4% of superfine powder, and the percentage by weight of additional auxiliary materials is: 0.15% of sodium hexametaphosphate, 1.5% of heat-resistant stainless steel fiber, and 0.12% of organic explosion-proof fiber. The main components of magnesium silicon in the lower non-slag line are: MgO 85.5%, SiO 2 14.5%; the specific raw material composition weight percentage is: 95% fused leather sand, 6% fused waste quartz, SiO 2 4% of superfine powder, and the percentage by weight of additional auxiliary materials is: 0.15% of sodium hexametaphosphate, 1.5% of heat-resistant stainless steel fiber, and 0.12% of organic explosio...

Embodiment 2

[0040] The main components of magnesium-aluminum-silicon on the upper slag line of the split combined slag retaining wall described in this embodiment are: MgO43.5%, Al 2 o 3 42.5%, SiO 2 14%; specific raw material composition weight percentages are: mid-range sintered magnesia 28%, 96 fused magnesia 18%, bauxite clinker 50.0%, SiO 24% of superfine powder, and the percentage by weight of additional auxiliary materials is: 0.15% of sodium hexametaphosphate, 1.5% of heat-resistant stainless steel fiber, and 0.12% of organic explosion-proof fiber. The main components of magnesium silicon in the lower non-slag line are: MgO87.0%, SiO 2 13%; the specific raw material composition weight percentage is: mid-grade sintered magnesia 70%, 95 fused leather sand 22%, fused waste quartz 4%, SiO 2 4% of superfine powder, and the percentage by weight of additional auxiliary materials is: 0.15% of sodium hexametaphosphate, 1.5% of heat-resistant stainless steel fiber, and 0.12% of organi...

Embodiment 3

[0046] The main components of magnesium-aluminum-silicon on the upper slag line of the split combined slag retaining wall described in this embodiment are: MgO40.0%, Al 2 o 3 46.0%, SiO 2 14%; specific raw material composition weight percentages are: mid-grade sintered magnesia 23%, 96 fused magnesia 18%, bauxite clinker 50.0%, fused aluminum-magnesium spinel 5%, SiO 2 4% of superfine powder, and the percentage by weight of additional auxiliary materials is: 0.15% of sodium hexametaphosphate, 1.5% of heat-resistant stainless steel fiber, and 0.12% of organic explosion-proof fiber. The main components of magnesium silicon in the lower non-slag line are: MgO 87.5%, SiO 2 12.5%; the specific raw material composition weight percentage is: 95 fused leather sand 70%, 96 fused magnesia 22%, fused waste quartz 4%, SiO 2 4% of superfine powder, and the percentage by weight of additional auxiliary materials is: 0.15% of sodium hexametaphosphate, 1.5% of heat-resistant stainless ste...

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Abstract

The invention discloses a split combination type slag dam for a tundish as well as a preparation and use method of the slag dam. The split combination type slag dam is divided into an upper part and alower part, and the upper part has a height of 1 / 3 of a total height and is a slag line part and is prepared from a magnesium-aluminum-silicon material; and the lower part has a height of 2 / 3 of thetotal height and is a non-slag line part and is prepared from a magnesium-silicon material, wherein the magnesium-aluminum-silicon material comprises the following main components: 38-52% of MgO, 35-48% of Al2O3, and 6-27% of SiO2; and the magnesium-silicon material comprises the following main components: 82-92% of MgO and 8-18% of SiO2. The upper part and the lower part are respectively preparedduring preparation, and the upper part and the lower part are assembled into one during installation. The slag dam provided by the invention fully utilizes the advantages of the magnesium-aluminum-silicon material and the magnesium-silicon material, avoids a phenomenon of stress cracking of a same slag dam due to different materials, and has the advantages of low costs, convenient preparation, service life of more than 30 hours, no cracking and no collapse.

Description

technical field [0001] The invention relates to the field of monolithic refractory prefabricated parts, in particular to a split combined slag retaining wall for a continuous casting tundish and a method for preparing and using the same. Background technique [0002] The use of slag retaining walls in continuous casting tundishes has become a commonly used technology. Its main function is to change the flow field of the molten steel in the tundish, so that the impurities in the molten steel float up to the surface of the molten steel in the shortest possible time and are absorbed by the covering agent to form steel slag. The process of forming steel slag is controlled in the ladle impact area within the slag retaining wall, and the formed steel slag does not enter the pouring area, so as to purify the molten steel and improve the cleanliness of the molten steel. It must be used in the production of variety steel, special steel and high-quality steel. technology. [0003] P...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/043B22D41/00
CPCB22D41/00C04B35/043C04B2235/3217C04B2235/3222C04B2235/3418C04B2235/447C04B2235/5212C04B2235/5216
Inventor 张文国李乃动张学敏梁绪正孙晓张滨李华君李宪奎
Owner 山东国茂冶金材料有限公司
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