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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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 vola

Method used

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Examples

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Example Embodiment

[0008] [Example] 1 A method for preparing dry vibrating material in a 28-ton tundish for continuous casting

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

[0010] Actual measurement index: MgO is 89.4%, SiO 2 6.2%; volume density: 110℃×24h 2.18g / cm 3 ; Compressive strength: 110℃×24h3.6MPa, 1500℃×3h 7.3MPa after firing; linear change rate: 1500℃×3h after firing -1.2%. This kind of material is used on 28 tons of continuous casting tundish, and the service life can reach more than 26 furnaces.

[0011] The characteristics of this embodiment are: ① simple construction; ② fast baking without cracking or peeling, sh...

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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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