Ladle permanent lining pouring material capable of rapid roasting

Abstract

The invention provides a ladle permanent lining pouring material capable of rapid roasting. The pouring material mainly comprises 45-75 parts of high bauxite, 10-20 parts of high-alumina hollow spheres, 3-5 parts of cyanite powder, 3-5 parts of alumina micro powder, 5-7 parts of silica micro powder, 3-5 parts of pure calcium aluminate cement, 0.5-1.5 parts of basic aluminium lactate powder, 0.02-0.06 part of metal aluminium powder, 0.1-0.3 part of organic fibres, and 0.1-0.3 part of water reducer. The pouring material capable of rapid roasting, provided by the invention, has the characteristics of being high in strength and refractoriness, good in thermal shock resistance, low in volume density and thermal conductivity, and considerable long in service life.

Description

technical field [0001] The invention relates to an unshaped refractory material, in particular to a casting material for a permanent layer of a ladle used for rapid baking. Background technique [0002] Existing refractory materials used for lining the permanent layer of ladles mainly include clay bricks, wax stone bricks and high-alumina castables, for example: castables with bauxite as the main raw material or bauxite-based sintered mullite as the main raw material. [0003] The Chinese invention patent CN01132037.0 published on May 7, 2003 discloses a castable for permanent lining of tundish, its component weight percent is: bauxite-grade mullite 30-75%, mullite 3-75% 67%, silica powder 1.5-5%, cement 3%, steel fiber 0.1-3%. [0004] The Chinese invention patent CN200710039530.7 published on October 31, 2007 discloses a low-density, high-temperature-resistant and high-aluminum lightweight castable, which is characterized in that: lightweight mullite aggregate 26-55%, flo...

AI Technical Summary

Problems solved by technology

Clay bricks and wax stone bricks both have the problems of low strength and low refractoriness. When removing the working layer of the ladle, the bricks are easy to fall off and the service life is low.

Existing new ladles that use high-alumina castables as permanent layers need to be baked for a long time in order to avoid baking bursts due to the presence of considerable moisture in the high-alumina dense castables. The initial baking time is greater than 12 hours. Usually 20 hours, resulting in frequent ladle turnover problems

Secondly, long-time baking also causes energy waste

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