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Aluminum-magnesium refractory castable material and preparation method thereof

A refractory castable and magnesia technology, applied in the field of refractory materials, can solve the problems of poor thermal shock resistance, erosion, accelerated slag, etc., and achieve the effect of reducing production cost, reducing thermal expansion rate and wide application range

Inactive Publication Date: 2012-10-10
LUOYANG LIER REFRACTORY MATERIAL +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the main reasons for the damage of aluminum-magnesium refractory castables are: (1) The linear expansion rate is relatively large, cracks will occur in the use of aluminum-magnesium refractory castables, and the furnace lining will bulge, resulting in a decrease in strength and penetration of slag; ( 2) The thermal shock resistance is poor, and cracks will appear on the surface or inside of the castable under rapid cooling and rapid heating conditions, which will accelerate the erosion of slag and cause damage to the material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) The weight percentage of raw materials used to prepare aluminum-magnesium castables is: 15% of tabular corundum particles 10-5mm; the weight percentages of white corundum with particle sizes of 5-3mm, 3-1mm and 1-0mm are 19% respectively %, 17% and 15%; white corundum fine powder 120 mesh 9%; white corundum fine powder 325 mesh 6%; activated alumina fine powder 10%; Powder 200 mesh 3.8%; binder is hydrated alumina micropowder 4%; silicon micropowder 0.6%; polyethylene organic fiber (additional) 0.06%; sodium hexametaphosphate (additional) 0.24%;

[0037] (2) Pre-mix white corundum particles of 10-5mm, white corundum particles of 5-3mm, 3-1mm and 1-0mm and fused magnesia particles, and then add corundum fine powder, activated alumina micro-powder, light Burnt magnesia fine powder, binder, silicon micropowder, organic fiber, water reducer, continue to mix until fully uniform, dry mix for 3 minutes, add clean tap water, the amount added is about 4.9% of the total weigh...

Embodiment 2

[0042] (1) The weight percentages of raw materials used to prepare aluminum-magnesium castables are: brown corundum with a particle size of 10~5mm and 5~3mm, the mass fractions are 15% and 20% respectively; the particle size is 3~1mm and 1mm ~0mm white corundum particles, the weight percentages are 14% and 21% respectively; white corundum fine powder 200 mesh 15%; activated alumina micropowder 5%; lightly burned magnesia particles 0.5~0.074mm 0.5%, fused magnesia Fine powder 200 mesh 4.5%; hydrated alumina micropowder 4%; silicon micropowder 1%; polyethylene fiber (extra) 0.06%; sodium hexametaphosphate (extra) 0.2%, sodium tripolyphosphate (extra) 0.1%;

[0043] (2) Premix brown corundum particles of 10-5mm and 5-3mm, white corundum particles of 3-1mm and 1-0mm, and lightly burned magnesia particles, and then add corundum fine powder, activated alumina micro-powder, Fused magnesia fine powder, binder, silicon micropowder, organic fiber, water reducer, continue to mix until fu...

Embodiment 3

[0048](1) The weight percentage of raw materials used to prepare aluminum-magnesium castables is: brown corundum 10~5mm 19%; white corundum with particle sizes of 5~3mm, 3~1mm and 1~0mm respectively, the weight percentage is 19% respectively , 17% and 15%; white corundum fine powder 320 mesh 15%; activated alumina fine powder 5.5%; fused magnesia particles 0.5~0.088mm is 0.5%, fused magnesia fine powder 200 mesh 4.5%; binder is Pure aluminate cement 4%; microsilica powder 0.5%; polyethylene organic fiber (additional) 0.06%; dispersed alumina superplasticizer (additional) 0.5%;

[0049] (2) Pre-mix brown corundum particles of 10-5mm, white corundum and fused magnesia particles of 5-3mm, 3-1mm and 1-0mm, and then add corundum fine powder, activated alumina micro-powder, electric Fused magnesia fine powder, binder, silicon micropowder, organic fiber, and water reducer, continue to mix until fully uniform, dry mix for 3 minutes, add clean tap water, the amount added is about 5% of...

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Abstract

The invention discloses an aluminum-magnesium refractory castable material and a preparation method thereof. The aluminum-magnesium refractory castable material comprises the following raw materials by proportion of weight percentage: 70-80 percent of corundum granules and powder, 5-15 percent of alumina powder, 2-10 percent of magnesium-containing material, 3-8 percent of binding agent, 0.3-1.5 percent of silica micropowder, 0.05-0.1 percent of organic fibers (additional) and 0.2-0.6 percent of water reducing agent (additional). The preparation method of the aluminum-magnesium refractory castable material comprises material preparation, material mixing, formation, curing, drying, storage, transportation, use and other process steps. Compared with the prior art, the aluminum-magnesium castable material has high thermal shock resistance, low cost and excellent performance, can be applied in walls, bottoms, permanent layers, water ports and other parts of large-scale steel ladles, and can also be applied in castable materials for RH (Rockwell hardness) dip pipes. Therefore, the aluminum-magnesium castable material can adapt to a variety of industrial production environments.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to an aluminum-magnesium refractory castable and a preparation method thereof. Background technique [0002] Most of the ladles in domestic steel mills are built with high-aluminum, aluminum-magnesium-carbon and other materials. Due to the needs of multi-furnace continuous casting and smelting clean steel, the capacity of ladles continues to expand, and the variety of molten steel is increasing, making the service life of ladles longer. harsh. In order to adapt to the smelting conditions of ladles, refractory workers have developed aluminum-magnesium refractory castables. The use of aluminum-magnesium refractory castables is currently not limited to ladles, but has been extended to high-temperature equipment such as RH refining furnaces and cement kilns. [0003] At present, the main reasons for the damage of aluminum-magnesium refractory castables are: (1...

Claims

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Application Information

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IPC IPC(8): C04B35/66
Inventor 崔庆阳寇志奇赵继增李有奇毛晓刚徐兵吴林林肖娅红孔祥魁金春燕
Owner LUOYANG LIER REFRACTORY MATERIAL
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