A long nozzle lining material without preheating composite structure

A composite structure, no preheating technology, applied in the direction of casting melt containers, manufacturing tools, metal processing equipment, etc., can solve the problems of cumbersome process and difficult control

Inactive Publication Date: 2015-09-16
LUOYANG INST OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the effect of this method is better, its technological process is more loaded down with trivial details and difficult to control

Method used

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  • A long nozzle lining material without preheating composite structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The ingredients of a composite structure long nozzle lining material are 20wt% fused white corundum; 38wt% fused zirconia mullite; 24wt% fused silica; 12wt% light-burned alumina; 6wt% zinc oxide; the binder is phenolic resin , and its addition is 8% of the total weight of the lining material.

Embodiment 2

[0028] The ingredients of a long nozzle lining material with a composite structure are 20wt% fused white corundum; 37wt% fused zirconia mullite; 24wt% fused silica; 11wt% lightly burned alumina; 8wt% zinc oxide; the binder is phenolic resin , and its addition is 8% of the total weight of the lining material.

Embodiment 3

[0030] The ingredients of a long nozzle lining material with a composite structure are 20wt% fused white corundum; 35wt% fused zirconia mullite; 24wt% fused silica; 11wt% lightly burned alumina; 10wt% zinc oxide; the binder is phenolic resin , and its addition is 8% of the total weight of the lining material.

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Abstract

A long nozzle lining material with no preheating composite structure, which relates to the field of functional refractory materials for continuous steel casting, and its ingredients are: corundum 20-50wt%, fused zirconia mullite 10-50wt%, fused silica 15-40wt% %, 5-20wt% of light-burned alumina and 5-15wt% of zinc oxide; plus 5-10% of the total weight of the lining material as a binder. The lining material of the invention has higher porosity, lower coefficient of thermal expansion and thermal conductivity, and can better resist erosion and corrosion of molten steel.

Description

technical field [0001] The invention relates to the field of functional refractory materials for continuous steel casting, in particular to a shroud lining material with a preheating-free composite structure that guides liquid steel from a ladle into a tundish. Background technique [0002] The long nozzle is installed under the ladle, and the molten steel is poured into A1 of the tundish from the ladle 2 o 3 - C-quality cylindrical channel, which plays the role of guiding flow and preventing secondary oxidation and splashing of molten steel. It is an important functional refractory material to realize the protective casting of molten steel to improve the quality of billets, and its use will directly affect whether the entire continuous casting process can be carried out normally. However, in the early stage of molten steel pouring, when the hot molten steel flows through the long nozzle, a large thermal stress will be generated inside it, which will cause it to crack. Th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D41/54C04B35/66
Inventor 刘辉敏郭献军李建伟钱跃进赵营刚
Owner LUOYANG INST OF SCI & TECH
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