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Method for preparing middle ladle dry vabrative material

A vibrating material and vibrating forming technology, applied in the field of preparation of dry vibrating material in tundish, can solve the problems of carbon increase, environmental pollution, irritation, etc., and achieve the effects of good corrosion resistance, environmental friendliness and easy disassembly

Inactive Publication Date: 2006-08-23
WUHAN UNIV OF SCI & TECH
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  • Description
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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 the phenolic resin and phosphate, chlorate, sulfate, etc. will volatilize from the material during baking to stimulate Sexual smell, also pollutes the environment
Therefore, the further popularization of this dry vibrating material in the smelting of low carbon steel and ultra-low carbon steel is restricted.

Method used

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Examples

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Embodiment Construction

[0008] [Example] 1 A preparation method of tundish dry vibration material for 28 tons of continuous casting

[0009] In weight percentage: 90% of sintered magnesia containing 97% of MgO, 10% of sodium metasilicate. Wherein the weight percentage of the gradation of the sintered magnesia is: 80-85% for 1-0.088mm, and 15-20% for <0.088mm. The above-mentioned raw materials are mixed, stirred evenly, molded by tire membrane vibration, baked at 110-300°C, and demolded to obtain the tundish lining.

[0010] Its measured index: MgO is 89.4%, SiO 2 6.2%; bulk density: 110℃×24h 2.18g / cm 3 ; Compressive strength: 110℃×24h3.6MPa, 7.3MPa after burning at 1500℃×3h; linear change rate: -1.2% after burning at 1500℃×3h. This material is used in 28-ton continuous casting tundish, and its service life can reach more than 26 furnaces.

[0011] The characteristics of this embodiment are: ①Easy construction; ②Quick baking without bursting or peeling, short baking time, and no smell; ③Good corro...

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Abstract

The present invention relates to the preparation process of dry vibrating material for middle ladle. The dry vibrating material is prepared with magnesite or forsterite in 85-97 wt% and sodium metasilicate in 3-15 wt%, and through mixing, vibration forming, stoving at 100-400 deg.c and demolding. The magnesite or forsterite is graded with 0.088-2 mm components in 80-90 wt% and 0.088 mm below components in 10-20 wt%. The present invention adopts non-toxic, smell-less and harmless sodium metasilicate as bonder, so that the dry vibrating material may be low temperature smelted during the stoving process to polymerize constantly to raise strength. The dry vibrating material has no carbon increment to the molten steel, high corrosion resistance, easy degradation and environment friendship.

Description

1. Technical field [0001] The invention belongs to the technical field of unshaped refractory materials. In particular, it relates to a preparation method of a tundish dry vibration material. 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 has changed from silicon insulation boards to magnesia and magnesia-calcium amorphous refractory materials, and the construction method has changed from masonry to manual painting and mechanical spraying. With the introduction of rapid nozzle replacement technology, a dry vibrating tundish has been developed material. Such as "continuous casting tun...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B35/04
Inventor 汪厚植顾华志张文杰胡铁山宋贵富
Owner WUHAN UNIV OF SCI & TECH
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