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High-strength compact zirconia-chromia corundum brick

A technology of zirconium chromium corundum brick and dense corundum, which is applied in the field of high-strength dense zirconium chromium corundum brick and its production, can solve the problems of low compressive and flexural strength, low bonding strength, and poor compactness, and achieve good slag erosion resistance, High strength and good thermal shock stability

Inactive Publication Date: 2007-01-03
高振东
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing aluminum-zirconium-chrome bricks do not give full play to the physical and chemical properties of high-quality refractory materials. The reason is that the bonding strength between materials is low and the compactness is poor, resulting in poor thermal shock stability, load softening temperature, and slag erosion resistance. The resistance and resistance to liquid metal erosion are not ideal, and the deficiencies of low compressive and flexural strength

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] High-strength dense zirconium-chromium corundum bricks are made of dense corundum, brown corundum, zirconia, chromium trioxide and industrial phosphoric acid, mixed together to make bricks, and then sintered. The ingredient ratio is calculated by weight percentage: 40% of dense corundum, 35% of brown corundum, 5% of zirconium dioxide, 20% of chromium trioxide, and industrial phosphoric acid is 4% of the total weight of the above ingredients. The particle size of dense corundum, brown corundum, zirconia and chromium trioxide is from 5mm to 1000 mesh.

Embodiment 2

[0019] High-strength dense zirconium-chromium corundum bricks are made of dense corundum, brown corundum, zirconium dioxide, and chromium oxide after crushing, adding industrial phosphoric acid, mixing them to make bricks, and sintering. The ratio of ingredients for the blank is calculated by weight percentage: 40% of dense corundum, 35% of brown corundum, 5% of zirconium dioxide, 20% of chromium trioxide, and 4% of the total weight of the above-mentioned ingredients for industrial phosphoric acid. The micropowder content in the billet is 5-30%, and the proportion of micropowder is 30% of dense corundum, 10% of brown corundum, 25% of zirconium dioxide, and 35% of chromium trioxide, of which 50% have a particle size greater than 1000 mesh, and the other 50% have a particle size greater than 200 mesh is less than 1000 mesh.

Embodiment 3

[0021] High-strength dense zirconium-chromium corundum bricks are made of dense corundum, brown corundum, zirconia, chromium trioxide and industrial phosphoric acid, mixed together to make bricks, and then sintered. The ingredient ratio is calculated by weight percentage: 35% of dense corundum, 25% of brown corundum, 15% of zirconium dioxide, 25% of chromium trioxide, and industrial phosphoric acid is 6.5% of the total amount of adobe ingredients.

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Abstract

The high strength compact zirconia-chromia corundum brick is produced with corundum, zirconia material, chromia material and binding agent. The material consists of compact corundum 10-80 wt%, brown corundum 0-60 wt%, zirconia material 1-25 wt%, chromia material 3-40 wt% and binding agent 1-12 wt%. The high strength compact zirconia-chromia corundum brick has high strength high heat shock stability, high slag corrosion resistance and high heat resistance.

Description

(1) Technical field [0001] The invention relates to a refractory material for metallurgy, in particular to a high-strength dense zirconium-chromium corundum brick and a production method. (2) Background technology [0002] At present, non-ferrous metal smelting furnaces usually use refractory bricks made of magnesia, magnesia-chrome, aluminum-chrome, aluminum, and aluminum-chromium-zirconium refractory materials to build furnaces. Stability, thermal shock stability and slag corrosion resistance are good to increase the number of smelting furnaces, the purpose is to increase productivity and reduce production costs. However, the existing aluminum-zirconium-chrome bricks do not give full play to the physical and chemical properties of high-quality refractory materials. The reason is that the bonding strength between materials is low and the compactness is poor, resulting in poor thermal shock stability, load softening temperature, and slag erosion resistance. The performance ...

Claims

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Application Information

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IPC IPC(8): C04B35/10C04B35/66
Inventor 高振东
Owner 高振东