A new type of magnesia-alumina-carbon brick made of carbon-containing residual ladle lining brick and its production method and application

Abstract

The invention discloses a novel magnesia-alumina-carbon brick produced by utilizing a carbon-containing residual ladle brick, and a production method and an application thereof. The magnesia-alumina-carbon brick has a formula concretely comprising the following components in parts by weight: 40 to 60 parts of the carbon-containing residual ladle brick, 20 to 40 parts of magnesite clinker, 5 to 15 parts of alumina, 1 to 6 parts of carbon, 2 to 10 parts of an additive and 3 to 5 parts of an additive binding agent. The magnesia-alumina-carbon brick has the following advantages: using performance is significantly improved; high corrosion resistance and stripping resistance are achieved; through cost accounting, the carbon-containing ladle brick is adopted to recycle, so the novel magnesia-alumina-carbon brick has a certain cost-reducing amplitude compared with a conventional aluminum-magnesium-carbon brick; infinite cyclic utilization of the carbon-containing residual ladle brick is realized; benefits of enterprises and the society are improved; and valuable refractory material resources are saved.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to a magnesia-alumina-carbon brick, a production method of the magnesia-alumina-carbon brick, and the application of the magnesia-alumina-carbon brick to a ladle. Background technique [0002] In the metallurgical industry, molten steel needs to be stored and transported in ladles, and some ladles are also used as refining containers outside the furnace. Therefore, the inside of the ladle must withstand the erosion and erosion of molten steel and slag at a temperature above 1600 ° C, and the use conditions are harsh. Direct contact with molten steel The working layer of steel slag and steel slag must use high-quality refractory materials. At present, the steel ladle used is composed of a steel shell, supporting feet, lifting trunnions and hook parts. In the steel shell, an insulation layer, a permanent layer and a working layer are arranged in sequence, and ...

AI Technical Summary

Problems solved by technology

[0003] Because the steel slag has seriously eroded the slag line, usually, it is necessary to replace the slag line lining brick one or more times in the middle, which is called minor repair. Re-building is called overhaul. The carbon-containing residual ladle lining bricks removed from major repairs account for about 30-50% of the total carbon-containing residual ladle lining bricks in the working layer. These residual ladle lining bricks are usually regarded as industrial Garbage disposal, on the one hand, not only pollutes the environment, but also causes a serious waste of valuable refractory resources; Steelmaking Process Requirements

Images