Corundum fireproof ball used for ball-type hot-blast stove and preparation method thereof

A corundum, refractory ball technology, used in brick blast furnaces and other directions, can solve the problems of short ball changing cycle, low strength of magnesium-aluminum balls, poor thermal shock resistance, etc. The effect of high compressive strength

Inactive Publication Date: 2009-10-14
巩义市金岭耐火材料有限公司
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  • Summary
  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

So far, magnesium-aluminum balls and high-alumina balls have been mostly used in the high-temperature and medium-temperature sections of large and medium-sized blast furnace ball-type hot blast stoves. Although magnesium-aluminum balls have the advantages of high density, high heat capacity, strong heat storage capacity, and good alkali resistance, However, magnesium aluminum balls have low strength, poor thermal shock resistance, easy hydration damage during use, are not suitable for acid s

Method used

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  • Corundum fireproof ball used for ball-type hot-blast stove and preparation method thereof
  • Corundum fireproof ball used for ball-type hot-blast stove and preparation method thereof
  • Corundum fireproof ball used for ball-type hot-blast stove and preparation method thereof

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Example Embodiment

[0029] Example 1

[0030]a. Weigh α-Al with a particle size of less than 0.2mm according to the raw materials, specifications, and weight percentages corresponding to Example 1 in Table 2 2 O 3 Particles, zirconia-containing materials with a particle size of less than 0.044mm, and additives with a particle size of less than 0.088mm (any one or a combination of fused magnesia or light burned magnesia powder) are prepared into all particle sizes by the method of dry co-mixing and grinding Fine powder less than 0.02mm (500 mesh) (the ball mill used in the co-mixing method is lined with corundum ceramic grinding lining bricks, and the ceramic grinding media ball is corundum ceramic grinding media ball or zirconia ceramic grinding media Ball, of which corundum ceramic grinding lining brick and corundum ceramic grinding media ball AI 2 O 3 The content of ≥95%, zirconia ceramic grinding media ball ZrO 2 The content is ≥94%. ),spare;

[0031] b. According to Example 1 in Table 2, high alu...

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Abstract

A corundum fireproof ball used for a ball-type hot-blast stove and a preparation method thereof are characterized in that the corundum fireproof ball comprises the following main materials, adhesive and additive, wherein the main materials comprises the following raw materials by weight percentage: 0-15% of corundum (granularity of 5-3mm), 30-60% of corundum (granularity of 3-1mm), 5-30% of corundum (granularity of 1-0.088mm), 0-10% of corundum (granularity less than 0.044mm), 10-25% of bauxite chamotte (granularity less than 0.088mm), 2-10% of Alpha-Al2O3 grain, 1-10% of zirconia-contained material, 2-8% of clay and 2-10% of mullite or materials containing mullite which is taken as main phase; the adding amount of the adhesive is 1-6% of the weight of the main materials; and the adding amount of the additive is 0-1% of the weight of the main materials. The preparation method comprises the following steps of ageing mixture, back-rolling, pressing and molding, drying billet, and sintering in a tunnel kiln and the sintering temperature is within 1450-1600 DEG C.

Description

technical field [0001] The invention relates to the technical field of refractory material production, in particular to a corundum refractory ball for a ball-type hot blast stove and a preparation method thereof. The corundum refractory ball can be used in the high-temperature section and the medium-temperature section of the large and medium-sized blast furnace ball-type hot blast stove. technical background [0002] At present, the spherical hot blast stove is replacing the traditional hot blast stove with its advantages of small footprint, high thermal efficiency and low investment. In order to improve the stability of large and medium-sized ball hot blast stoves and increase their wind temperature, high-quality refractory balls are needed to support them. So far, magnesium-aluminum balls and high-alumina balls have been mostly used in the high-temperature and medium-temperature sections of large and medium-sized blast furnace ball-type hot blast stoves. Although magnesi...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B35/622C21B9/06
Inventor 刘永春刘永升宋继昌潘之雄
Owner 巩义市金岭耐火材料有限公司
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