Tundish impact plate resistant to molten steel scouring and preparation method and construction method thereof

A tundish and impact plate technology, applied in the field of steelmaking, can solve the problems of poor molten steel impact resistance, low high temperature flexural strength, low thermal shock stability, etc., and achieves high compressive strength, low production cost, and easy operation. Effect

Active Publication Date: 2020-07-31
BEIJING RUIPU TONGCHUANG TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003]At present, there are two types of commonly used tundish impact plates: one is Al2O3-MgO -C material unfired brick, Al2O3-MgO-C material unfired brick adopts extrusion molding, but the high temperature flexural strength is low, and the impact resistance of molten steel is poor , due to the large change of permanent line after burning, cracks are easy to occur during high temperature use; the other type is Al2O3-MgO material prefabricated parts, Al2 O3-MgO material prefabricated parts are casted, but the high-temperature flexural strength is low, and the impact resistance of molten steel is poor. Cracks are prone to occur due to the thermal shock of molten steel poured in the tundish

Method used

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  • Tundish impact plate resistant to molten steel scouring and preparation method and construction method thereof
  • Tundish impact plate resistant to molten steel scouring and preparation method and construction method thereof

Examples

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Effect test

Embodiment 1

[0043] A tundish impact plate with resistance to molten steel erosion, the raw material ratio is shown in Table 1.

[0044] The preparation method of the tundish impact plate comprises the following steps:

[0045]S1. Mix the tabular corundum, superfine powder, reinforcing agent and flake graphite evenly to form the main material;

[0046] Among them, tabular corundum includes corundum coarse aggregate, corundum fine aggregate and corundum fine powder, the particle size of corundum coarse aggregate is 3-1mm, the particle size of corundum fine aggregate is less than 1mm, and the mesh number of corundum fine powder is 325 meshes; The superfine powder is alumina superfine powder, the weight content of alumina in the alumina superfine powder is 99.5%, and the average particle size is 2 μm; the reinforcing agent is metal aluminum fine powder, and the weight content of elemental aluminum in the reinforcing agent is 99.5% , the mesh number of metal aluminum fine powder is 180 mesh; ...

Embodiment 2-12

[0053] A tundish impact plate resistant to molten steel erosion, the difference between Examples 2-12 and Example 1 is that the raw material ratio of the tundish impact plate is different, and the raw material ratio is shown in Table 1.

Embodiment 13

[0055] A tundish impact plate with resistance to molten steel erosion, the raw material ratio is shown in Table 1.

[0056] The preparation method of the tundish impact plate comprises the following steps:

[0057] S1. Mix the tabular corundum, high alumina vanadium clinker, superfine powder, reinforcing agent and flake graphite evenly to form the main material;

[0058] Among them, tabular corundum includes corundum coarse aggregate, corundum fine aggregate and corundum fine powder, the particle size of corundum coarse aggregate is 3-1mm, the particle size of corundum fine aggregate is less than 1mm, and the mesh number of corundum fine powder is 325 meshes; The weight content of alumina in the high alumina vanadium soil clinker is 88%. The high alumina vanadium soil clinker includes clinker coarse aggregate and clinker fine aggregate. The particle size of the aggregate is less than 1mm; the superfine powder is alumina superfine powder, the weight content of alumina in the a...

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Abstract

The invention relates to a tundish impact plate capable of resisting molten steel scouring as well as a preparation method and a construction method thereof. The invention belongs to the technical field of steelmaking. The tundish impact plate comprises, by weight, a main material and a binding agent, wherein the main material comprises the following raw materials in percentage by weight: 55-90% of tabular corundum, 0-28% of high-alumina bauxite clinker, 4-10% of ultrafine powder, 5-8% of a reinforcing agent and 0.5-1.5% of crystalline flake graphite; the dosage of the binding agent is 2.9-3.1% of that of the main material, the reinforcing agent is metal aluminum fine powder, and the tundish impact plate is obtained through mixing, mechanical pressing forming and heat treatment of the rawmaterials. The tundish impact plate has the advantages of higher breaking strength, higher compressive strength and lower linear change rate after burning, so that the tundish impact plate has good molten steel scouring resistance, and meanwhile, the tundish impact plate also has the advantages of simplicity and convenience in preparation and convenience in control.

Description

technical field [0001] The invention relates to the technical field of steelmaking, in particular to a tundish impact plate with resistance to molten steel scouring and a preparation method and a construction method thereof. Background technique [0002] The tundish is one of the main equipment for steelmaking and continuous casting. The molten steel of the intermittent ladle is injected into the tundish, and then the molten steel is controlled to flow into the mold through the tundish function, and then the molten steel is pulled out of the continuous casting billet smoothly and orderly. The distance from the discharge port of the intermittent ladle to the tundish is generally more than 1.8m. The molten steel is injected into the tundish, and an impact area is formed on the tundish. The thermal impact of molten steel on the impact area of ​​the tundish is very large, especially when the tundish is opened and poured at a low liquid level for a long time. For the service lif...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/103B22D41/00
CPCC04B35/103B22D41/00C04B2235/402C04B2235/425C04B2235/5427C04B2235/5436C04B2235/602C04B2235/77C04B2235/96C04B2235/9615C04B2235/9676Y02P10/20
Inventor 王少锋杨林李卫华罗燕宇姜乐
Owner BEIJING RUIPU TONGCHUANG TECH DEV
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