Composite baking-free stopper rod of magnesium aluminate spinel and production process thereof

A magnesia-aluminum spinel and stopper technology, which is applied in the field of stoppers, can solve the problems of expensive zirconia, energy consumption, and seldom use, and achieve strong resistance to slag erosion, long service life, and satisfying multiple requirements. Effect of Furnace Continuous Casting Performance Requirements and Product Quality Requirements

Inactive Publication Date: 2009-05-13
淄博大正新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] 5. Composite stopper with zirconia and graphite, this ZrO 2 -C stopper rods are generally suitable for casting all kinds of steel, but because zirconia is very expensive, it is rarely used
[0009] As far as the production process of stopper rod refractories is concerned, the production process of the above-mentioned stopper rods is mostly isostatic pressing and sintering with buried carbon, which not only consumes energy, but also pollutes the environment

Method used

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  • Composite baking-free stopper rod of magnesium aluminate spinel and production process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The weight proportion of rod head composition raw material is:

[0033] 18# (referring to particle size requirements) magnesium aluminum spinel 22%, 100# magnesium aluminum spinel 26%, 325# magnesium aluminum spinel 32%, graphite powder 10%, antioxidant (silicon carbide) 3% , 4% liquid phenolic resin and 3% non-burning agent;

[0034] The weight proportion of rod body composition raw material is:

[0035] 100# α-corundum aggregate 40%, α-corundum powder (325#) 30%, graphite powder 25%, alumina powder 1%, non-burning agent 1% and liquid phenolic resin 3%.

[0036] Wherein the weight composition of the burn-proof agent is as follows: the total amount of raw materials of the burn-proof agent is 100%: 35% of aluminum oxide powder, 15% of boron carbide, 5% of solid phenolic resin and 45% of metal silicon powder.

[0037] Produced according to the production process described in the present invention.

Embodiment 2

[0039] The weight proportion of rod head composition raw material is:

[0040] 36# (referring to particle size requirements) magnesia-alumina spinel 15%, 70# magnesia-alumina spinel 30%, 325# magnesia-alumina spinel 35%, graphite powder 8%, antioxidant (silicon carbide) 2.5% , 2.5% liquid phenolic resin and 7% non-burning agent;

[0041] The weight proportion of rod body composition raw material is:

[0042] 18# α-corundum aggregate 44%, α-corundum powder (325#) 25%, graphite powder 20%, alumina powder 3%, non-burning agent 3% and liquid phenolic resin 5%.

[0043] Wherein the weight composition of the burn-proof agent is as follows: the total amount of raw materials of the burn-proof agent is 100%: 40% of aluminum oxide powder, 10% of boron carbide, 5% of solid phenolic resin and 45% of metal silicon powder.

[0044] Produced according to the production process described in the present invention.

Embodiment 3

[0046] The weight proportion of rod head composition raw material is:

[0047] 22# (referring to particle size requirements) magnesium aluminum spinel 25%, 120# magnesium aluminum spinel 20%, 325# magnesium aluminum spinel 30%, graphite powder 12%, antioxidant (metal silicon powder) 3 %, liquid phenolic resin 4% and non-burning agent 67%;

[0048] The weight proportion of rod body composition raw material is:

[0049] 60# α-corundum aggregate 50%, α-corundum powder (325#) 25%, graphite powder 20%, alumina powder 1%, non-burning agent 1% and liquid phenolic resin 3%.

[0050] Wherein the weight composition of the burn-proof agent is as follows: the total amount of raw materials of the burn-proof agent is 100%: 30% of alumina powder, 10% of boron carbide, 10% of solid phenolic resin and 50% of metal silicon powder.

[0051] Produced according to the production process described in the present invention.

[0052] The main technical properties of the magnesia-aluminum-spinel co...

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Abstract

The invention relates to a magnesium-aluminum spinel composite baking-free plug bar. A plug bar head comprises the following raw materials: 15 to 25 percent of No. 18-36 magnesium-aluminum spinel, 20 to 30 percent of No. 70-120 magnesium-aluminum spinel, 30 to 35 percent of No. 325 magnesium-aluminum spinel, 8 to 12 percent of graphite powder, 1.5 to 3.5 percent of antioxidant, 2 to 4 percent of phenolic resin, and 3 to 7 percent of baking-free agent. A plug bar body comprises the following raw materials: 35 to 50 percent of No. 18-120 alpha-corundum aggregate, 25 to 35 percent of alpha-corundum aggregate, 20 to 30 percent of graphite powder, 1 to 3 percent of alumina powder, 1 to 5 percent of baking-free agent, and 3 to 5 percent of phenolic resin. The magnesium-aluminum spinel composite baking-free plug bar is formed by addition of the baking-free agent with special compositions, forming and low-temperature roasting. The product has the characteristics of strong slag erosion resistance, good thermal shock stability, high strength, erosion resistance, scour prevention, fire resistance, long service life, low production cost and so on, saves energy resources, and can meet the multi-furnace continuous casting performance requirement and the product quality requirement.

Description

technical field [0001] The invention belongs to metallurgical articles, in particular to a stopper used in continuous casting of iron and steel. Background technique [0002] As one of the three major parts of steel continuous casting, the integral stopper rod is used to control the flow of molten steel from the tundish to the mold, so as to ensure the stability of the liquid level of molten steel in the mold and the stability of the continuous casting process. At present, there are not many researches on stopper refractory materials for steel continuous casting abroad, but there are many domestic products and technologies related to steel continuous casting stopper rods. In terms of stopper material and use characteristics, there are mainly the following types: [0003] 1. Using high-grade fused corundum and flake graphite as the main raw materials, adding antioxidants and special additives to make aluminum carbon stopper rods, the rod head material is Al 2 o 3 -C-based, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66B22D41/18
Inventor 杨东
Owner 淄博大正新材料科技有限公司
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