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Low-carbon converter tapping hole bushing brick

A tapping hole and converter technology, applied in the field of refractory high-temperature materials, can solve the problems affecting the steelmaking rhythm, etc., and achieve the effects of excellent oxidation resistance, strong erosion and erosion, and low apparent porosity

Inactive Publication Date: 2021-06-29
云南濮耐昆钢高温材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the refining ratio of steel mills has been greatly increased and high turnover is pursued, the life of ordinary taphole casing bricks is only more than 100 times, which cannot meet the fast-paced production of steel mills and affects the subsequent steelmaking rhythm.

Method used

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Examples

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Effect test

preparation example Construction

[0018] A method for preparing a high-strength low-carbon converter taphole casing brick, comprising the following steps:

[0019] 1) Take fused large crystalline magnesia and pulverize it to a particle size of no more than 5mm, crush magnesia aluminum spinel to a particle size of not more than 0.1mm, pulverize alumina micropowder of 1μm, metal aluminum powder of 325 mesh, flake graphite of 100 mesh, and 200 mesh Silicon powder, 325-mesh boron carbide powder, and Carbores P carbon-containing resin powder are used as raw materials for future use.

[0020] 2), calculate and weigh each raw material prepared in step 1) by weight, 80-90 parts of fused large crystal magnesia, 0-4 parts of fused magnesia-aluminum spinel, 3-6 parts of graphite, alumina 0-5 parts of fine powder, 2-3 parts of metal aluminum powder, 0.5-1 part of silicon powder, 0-0.5 parts of boron carbide, 0.5-1 part of Carbores P carbon-containing resin powder, 2-5 parts of binder, 1-3 parts of rare earth parts, 2 to ...

Embodiment 1

[0025] A low-carbon converter taphole casing brick, comprising the following components in parts by weight: 80 parts of fused large crystal magnesia, 0 parts of fused magnesia-aluminum spinel, 3 parts of graphite, 0 parts of alumina micropowder, metal 2 parts of aluminum powder, 0.5 part of silicon powder, 0 part of boron carbide, 0.5 part of CarboresP carbon-containing resin powder, 2 parts of binder, and 1 part of rare earth.

Embodiment 2

[0027] A low-carbon converter taphole casing brick, comprising the following components in parts by weight: 85 parts of fused large crystal magnesia, 2 parts of fused magnesia-aluminum spinel, 4 parts of graphite, 2 parts of alumina micropowder, metal 2.5 parts of aluminum powder, 0.7 parts of silicon powder, 0.2 parts of boron carbide, 0.7 parts of Carbores P carbon-containing resin powder, 3 parts of binder, and 2 parts of rare earth.

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Abstract

The invention discloses a low-carbon converter tapping hole bushing brick, which comprises the following components: fused macrocrystalline magnesia, fused magnesium aluminate spinel, graphite, alumina micro powder, metal aluminum powder, silicon powder, boron carbide, CarboresP carbon-containing resin powder, a binding agent and rare earth. The bushing brick provided by the invention has the advantages of high thermal shock resistance, high molten steel and slag scouring erosion resistance, high temperature resistance, lower apparent porosity and excellent oxidation resistance, greatly prolongs the service life of the steel tapping hole bushing brick, can meet the fast-paced production of a steel mill, guarantees the stable follow-up steelmaking rhythm, and improves the production efficiency.

Description

technical field [0001] The invention belongs to the technical field of refractory high-temperature materials, and in particular relates to a low-carbon converter taphole casing brick. Background technique [0002] The tap hole is an indispensable functional refractory material for converter steelmaking. Its service life directly affects the converter smelting cycle, steelmaking production efficiency and slag blocking effect, which in turn affects steel quality. The integrity of the tap hole is directly related to the control of the slag volume of the converter, and has a direct impact on the alloy yield and subsequent processing procedures (LF, RH, etc.). Therefore, a tap hole with excellent performance should have good thermal shock resistance, high high temperature strength, corrosion resistance to molten steel and slag, and excellent oxidation resistance. Since the refining ratio of steel mills has been greatly increased and high turnover is pursued, the life span of ord...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/043C21C5/44
CPCC04B35/043C21C5/445C04B2235/3222C04B2235/425C04B2235/3217C04B2235/402C04B2235/428C04B2235/3821C04B2235/424C04B2235/3232
Inventor 康冬冬鲁志燕陈勇唐兵张向前
Owner 云南濮耐昆钢高温材料有限公司
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