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Continuous casting nozzle lining layer material and preparation method thereof

A lining layer and nozzle technology, which is applied in the field of continuous casting nozzle lining material and its preparation, can solve the problems of loss, inclusions, and lower billet quality in steel mills, and achieve thermal shock relief, low thermal expansion, and long service life Effect

Active Publication Date: 2022-01-07
赛文斯新型材料(无锡)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As the pouring proceeds, the deposit layer thickens, the pore size shrinks, and finally blocks until the pouring stops, which brings unnecessary losses to the steel plant; at the same time, inclusions are easy to enter the molten steel from the submerged paddy field again during the casting process, forming Large inclusions reduce billet quality

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] In Example 1, the material for the lining layer of the continuous casting nozzle includes the following raw materials in parts by weight: 12 parts of fused corundum, 16 parts of corundum hollow balls, 8 parts of fused silica, 3 parts of boron nitride fiber, modified 25 parts of dolomite powder, 6 parts of zircon mullite, 2 parts of magnesium spinel and 6 parts of phenolic resin.

[0025] Further, the preparation method of the modified dolomite powder includes the following steps: adding deionized water to the dolomite powder, the amount of deionized water added is 5 times the mass of the dolomite powder, then adding sodium hexametaphosphate, sodium hexametaphosphate The amount of dolomite powder added is 0.03 times the mass of dolomite powder, fully stirred, and then silicotungstate and binder are added. The amount of silicotungstate added is 0.6 times the mass of dolomite powder, and the amount of binder added is 0.2 times the mass of dolomite powder. Doubling, ultraso...

Embodiment 2

[0038] In Example 2, the material for the lining layer of the continuous casting nozzle includes the following raw materials in parts by weight: 18 parts of fused corundum, 30 parts of corundum hollow balls, 12 parts of fused silica, 7 parts of boron nitride fiber, modified 32 parts of dolomite powder, 12 parts of zircon mullite, 8 parts of magnesium spinel and 8 parts of phenolic resin.

[0039] Further, the preparation method of the modified dolomite powder includes the following steps: adding deionized water to the dolomite powder, the amount of deionized water added is 8 times the mass of the dolomite powder, then adding sodium hexametaphosphate, sodium hexametaphosphate The amount of dolomite powder added is 0.06 times the mass of dolomite powder, fully stirred, and then silicotungstate and binder are added. The amount of silicotungstate added is 1.5 times the mass of dolomite powder, and the amount of binder added is 0.4 times the mass of dolomite powder. Doubling, ultra...

Embodiment 3

[0052] In Example 3, the material for the lining layer of the continuous casting nozzle includes the following raw materials in parts by weight: 15 parts of fused corundum, 24 parts of corundum hollow balls, 10 parts of fused silica, 5 parts of boron nitride fiber, modified 28 parts of dolomite powder, 9 parts of zircon mullite, 5 parts of magnesium spinel and 7 parts of phenolic resin.

[0053] Further, the preparation method of the modified dolomite powder includes the following steps: adding deionized water to the dolomite powder, the amount of deionized water added is 7 times the mass of the dolomite powder, then adding sodium hexametaphosphate, sodium hexametaphosphate The amount of dolomite powder added is 0.05 times the mass of dolomite powder, fully stirred, and then silicotungstate and binder are added. The amount of silicotungstate added is 1.1 times the mass of dolomite powder, and the amount of binder added is 0.3 times the mass of dolomite powder. times, ultrasoni...

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PUM

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Abstract

The invention relates to the technical field of nozzle lining layer materials, in particular to a continuous casting nozzle lining layer material and a preparation method thereof. The continuous casting nozzle lining layer material comprises the following raw materials in parts by weight: 12-18 parts of fused corundum, 16-30 parts of corundum hollow spheres, 8-12 parts of fused quartz, 3-7 parts of boron nitride fibers, 25-32 parts of modified dolomite powder, 6-12 parts of zirconium mullite, 2-8 parts of magnesia spinel and 6-8 parts of phenolic resin. The continuous casting nozzle lining layer material is simple in preparation method and has strong scouring resistance and long service life; and an anti-fouling layer can be formed on the inner wall of the nozzle through the lining layer material, so that aluminum oxide adhesion is prevented, and the anti-blocking purpose is achieved.

Description

technical field [0001] The invention relates to the technical field of nozzle lining layer materials, in particular to a continuous casting nozzle lining layer material and a preparation method thereof. Background technique [0002] The nozzle is installed in the tundish, which is the passage of molten steel from the tundish to the crystallizer, and plays the functions of preventing secondary oxidation and distribution of molten steel. It is the most important functional refractory material for continuous casting of iron and steel. Its quality will directly affect whether the entire continuous casting process can be carried out normally. billet quality. [0003] The nozzle is generally made of aluminum carbon material. The surface of the molten steel is decarburized when it passes through, forming an uneven pore structure. The molten steel invades into the pores, and local stagnation of the molten steel flow occurs on the surface. Especially in the continuous casting of ti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/01B22D41/54
CPCC04B35/66C04B35/01B22D41/54C04B2235/3217C04B2235/3418C04B2235/524C04B2235/3463C04B2235/3222C04B2235/447C04B2235/3427C04B2235/5427C04B2235/5436C04B2235/5445C04B2235/602C04B2235/656C04B2235/6562C04B2235/6567C04B2235/9607C04B2235/9676
Inventor 马庆娟
Owner 赛文斯新型材料(无锡)有限公司
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