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Castable for tundish slag retaining wall and preparation method thereof
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A castable and slag retaining wall technology, applied in the field of refractory materials, can solve the problems of not having high normal temperature strength and hot high temperature strength at the same time, so as to improve market competitiveness, reduce the rate of change of judgment, and improve the service life.
Active Publication Date: 2020-01-07
武汉钢铁有限公司
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[0003] The invention provides a castable for tundish slag retaining wall and a preparation method thereof, which solves the technical problem that the castable for steel mill slag retaining wall cannot have high normal temperature strength and thermal high temperature strength at the same time in the prior art
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[0039] A kind of preparation method of castable for slag retaining wall in middle bag, please refer to figure 1 ,include:
[0040] Step S101: Mix the components in the main material evenly; according to the weight ratio, the main material contains 45-75% of fused white corundum and / or tabular corundum, 5-15% of fused dense corundum, 1- 10% fused magnesia powder, 1-5% spinel particles, 2-10% spinel micropowder, 2-10% activated alumina powder, 3-6% calciumaluminatecement and 0.2% ~2% silicon micropowder; wherein, the particle sizes of the fused white corundum, tabular corundum, and fused dense corundum are all less than or equal to 15mm;
[0041] Step S102: adding a water reducing agent and an explosion-proof organic fiber to the mixed main material and mixing to obtain a mixture; wherein, the consumption of the water reducing agent and the explosion-proof organic fiber is respectively 0.5~100% of the total weight of the main material. 1% and 0.01~0.15%;
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Abstract
The invention discloses a castable for a tundishslag wall and a preparation method of the castable, and belongs to refractory materials used in the technical field of iron and steel making. The castable comprises a main material and additives. The main material comprises, by weight, 45-75% of fused white corundum and / or tabular corundum, 5-15% of fused dense corundum, 1-10% of fused magnesitepowder, 1-5% of spinel particles, 2-10% of spinelfine powder, 2-10% of activated aluminum oxide, 3-6% of calciumaluminatecement and 0.2-2% of silica powder, wherein particles sizes of fused white corundum, tabular corundum and fused dense corundum are all smaller than or equal to 15 mm. The additives include water reducer and anti-explosion organic fibers, the use amount of the water reducer is 0.5-1% of the total weight of the main material, and the use amount of the anti-explosion organic fibers is 0.01-0.15% of total weight of the main material. The castable has high normal-temperature strength and high-temperature hot strength, and can effectively prolong the service life of the tundishslag wall.
Description
technical field [0001] The invention relates to a refractory material used in the technical field of iron and steel smelting, in particular to a castable for a slagretaining wall in a middle bag and a preparation method thereof. Background technique [0002] The tundish is located between the ladle and the mold, and is used to receive molten steel from the ladle and inject molten steel into the mold. The slag retaining wall is the core component of the tundish. First of all, it should have good construction performance. The construction body will not be hydrated or cracked during maintenance and baking, and will not collapse and be resistant to erosion during use. It can meet the needs of multiple furnaces. Requirements for continuous casting of steel. Secondly, the slag retaining wall is a thin-plate prefabricated part, which should have high enough strength to meet the requirements of handling and hanging installation. In use, it needs to undergo rapid baking from norma...
Claims
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