Tundish dry ribration material for continuous casting and its preparation method

A dry vibrating material and tundish technology, applied in casting equipment, manufacturing tools, metal processing equipment, etc., can solve the problems of environmental pollution, irritation, carbon increase, etc., and achieve good corrosion resistance, easy disassembly, and long service life long effect

Inactive Publication Date: 2005-08-10
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the carbon and hydrogen after carbonization of the binder phenolic resin of this kind of dry material will obviously add carbon and hydrogen to the molten steel, and when baking, the pungent smell will be volatilized from the material, which will also pollute the environment. Therefore, it is restricted The further promotion of this kind of dry vibrating material in the smelting of low carbon steel and ultra-low carbon steel

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0010] [Example] 1 A tundish environment-friendly dry vibrating material for 30 tons of slab continuous casting

[0011] In terms of weight percentage: 85-90% of sintered magnesia containing 94%-95% of MgO, 5-10% of lightly burned magnesia powder, 2-8% of water glass, 0.5-2% of bentonite, Suzhou soil is 0.5-2%, sodium tripolyphosphate is 0.5-1%, and polyvinyl alcohol is 0.2-1%.

[0012] The particle gradation of sintered magnesia is: 10-12% for 5-3mm, 32-36% for 3-1mm, 23-28% for <1mm, and 23-25% for <0.074mm.

[0013] The raw materials according to the above ratio are stirred and mixed evenly, and then formed by vibrating the tire film, baked at 200-350° C., and demoulded to obtain the inner lining of the tundish.

[0014] Its measured chemical index: MgO is 90.13%, SiO 2 7.1%, Al 2 o 3 1.2%; bulk density: 110℃×24h 2.08g / cm 3 ; Compressive strength: 110℃×24h2.4MPa, 8.1MPa after burning at 1500℃×3h; linear change rate: -1.0% after burning at 1500℃×3h. This kind of materi...

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Abstract

A lining material of tundish for conticasting is prepared from 6 primary raw materials including sintered magnesium sand, electrosmelted magnesium sand, forsterite, light forsterite, etc and 9 secondary raw materials including water glass, sodium tripolyphosphate, dextrin, starch, etc through proportionally mixing, stirring, loading in mould, vibrating, baking at 150-400 deg.C and demoulding.

Description

1. Technical field [0001] The invention belongs to the technical field of unshaped refractory materials. In particular, it relates to a tundish dry material for continuous casting and its preparation technology. 2. Background technology [0002] The working lining of the tundish plays the role of high temperature resistance, slag erosion resistance, heat insulation and heat preservation in the continuous casting production process. With the increasing demand for clean steel and alloy steel, the tundish also becomes the secondary treatment of molten steel in the steelmaking process. The final key link of refining. The working lining of the tundish is changed from silicon insulation board to magnesium and magnesium-calcium amorphous refractory materials, and the construction method is changed from masonry to manual painting and mechanical spraying. The construction is simple, the service life of the tundish is extended, and the molten steel is purified to a certain extent. I...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D41/02C04B35/04
Inventor 汪厚植顾华志张文杰吴峰倪国巨
Owner WUHAN UNIV OF SCI & TECH
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