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Magnesia castable and production process of slag baffling component for tundish

A technology of magnesia castables and magnesia, which is applied in the direction of manufacturing tools, metal processing equipment, casting melt containers, etc., can solve the problems of reducing the performance of magnesia refractory materials and intensifying erosion behavior, so as to ensure construction performance and use performance, meet long-distance transportation and hoisting, and improve the effect of normal temperature strength

Inactive Publication Date: 2017-09-01
PUYANG REFRACTORIES GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The slag infiltration further intensifies the erosion behavior and reduces the performance of magnesia refractories

Method used

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  • Magnesia castable and production process of slag baffling component for tundish

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The magnesia castable in this embodiment is composed of the following raw materials: 90 kg of magnesia composed of magnesia aggregate and magnesia fine powder, 6 kg of silica, waste magnesia-chrome brick aggregate and waste magnesia-chrome brick powder composed of waste magnesia Chrome brick 12kg, SiO 2 Micro powder 3.5 kg, sodium tripolyphosphate 0.2 kg, organic fiber 0.05 kg, steel fiber 0.5 kg.

[0035] The magnesia is fused magnesia with a mass fraction of MgO of 93%; magnesia with a particle size of 0.088 mm or less and greater than 0 mm, magnesia with a particle size of 8 mm or less and greater than 5 mm accounted for 15% of the total weight of magnesia, and magnesia with a particle size of 5 mm or less and greater than 3 mm Magnesia accounts for 15% of the total weight of magnesia, magnesia with particle size less than or equal to 3mm and greater than 1mm accounts for 20% of the total weight of magnesia, and magnesia with particle size less than or equal to 0.08...

Embodiment 2

[0046] The magnesia castable in this embodiment is composed of the following raw materials: 90 kg of magnesia composed of magnesia aggregate and magnesia fine powder, 15 kg of silica, waste magnesia-chrome brick aggregate and waste magnesia-chrome brick fine powder. Chrome brick 30 kg, SiO 2 Micro powder 4.5 kg, sodium tripolyphosphate 0.3 kg, organic fiber 0.05 kg, steel fiber 0.5 kg.

[0047] The magnesia is fused magnesia with a mass fraction of MgO of 90%; magnesia with a particle size of 0.088 mm or less and greater than 0 mm, magnesia with a particle size of 8 mm or less and greater than 5 mm accounted for 18% of the total weight of magnesia, and magnesia with a particle size of 5 mm or less and greater than 3 mm Magnesia accounts for 17% of the total weight of magnesia, magnesia with particle size less than or equal to 3mm and greater than 1mm accounts for 25% of the total weight of magnesia, and magnesia with particle size less than or equal to 0.088mm and greater tha...

Embodiment 3

[0058] The magnesia castable in this example consists of the following raw materials: 90 kg of magnesia, 4 kg of silica, 30 kg of waste magnesia-chrome brick aggregate and waste magnesia-chrome brick fine powder, SiO 2 Micro powder 5 kg, sodium hexametaphosphate 0.1 kg, organic fiber 0.05 kg, steel fiber 0.5 kg.

[0059] The magnesia is fused magnesia with a mass fraction of MgO of 94%; magnesia with a particle size of 0.088 mm or less and greater than 0 mm, magnesia with a particle size of 8 mm or less and greater than 5 mm accounted for 21% of the total weight of magnesia, and magnesia with a particle size of 5 mm or less and greater than 3 mm Magnesia accounts for 20% of the total weight of magnesia, magnesia with particle size less than or equal to 3mm and greater than 1mm accounts for 30% of the total weight of magnesia, and magnesia with particle size less than or equal to 0.088mm and greater than 0mm accounts for magnesia weight The percentages are 40% respectively; th...

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Abstract

The invention discloses a magnesia castable and a production process of a slag baffling component for a tundish. The magnesia castable comprises the following raw materials in parts by weight: 70-95 parts of magnesia consisting of magnesia aggregate and magnesia fine powder, 4-15 parts of silica, 5-30 parts of waste magnesia-chrome brick consisting of waste magnesia-chrome brick aggregate and waste magnesia-chrome brick fine powder, 2-10 parts of silicon dioxide micropowder, 0.1-0.5 part of a composite additive, 0.01-0.1 part of organic fiber and 0.1-1 part of steel fiber. The slag baffling component for the tundish, which is produced from the magnesia castable provided by the invention, is long in service life, resistant to molten steel erosion, resistant to slag erosion and good in anti-peeling performance.

Description

technical field [0001] The invention relates to an unshaped refractory material and a production process thereof, in particular to a slag retaining board for a continuous casting tundish in a steelmaking process, a slag retaining dam pouring material and a production process thereof. Background technique [0002] The main function of the slag retaining plate and slag retaining dam for continuous casting tundish is to eliminate the dead zone in the bottom area of ​​the tundish; to improve the flow path of molten steel, to make the molten steel flow along the liquid surface of steel slag, to shorten the floating distance of inclusions, and to facilitate the absorption of slag Promoting reasonable distribution of heat flow, reducing the temperature difference of molten steel at each nozzle to a minimum; limiting the strong eddy current caused by the injection impact of the ladle to a local area, preventing surface fluctuations caused by turbulent flow diffusion and slag being in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/047C04B35/80C04B35/622B22D41/00
CPCC04B35/047B22D41/00C04B35/62204C04B35/803C04B2235/3201C04B2235/3418C04B2235/447C04B2235/5212C04B2235/524
Inventor 陈昌平孙荣海尚学军宋世锋
Owner PUYANG REFRACTORIES GRP CO LTD
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