Quick-drying self-flowing castable for reclaimed ladle permanent layer

Abstract

The invention discloses a self-flowing castable for a reclaimed ladle permanent layer. The castable is prepared from raw materials in percentage by mass as follows: 46%-56% of a waste ladle permanentlayer reclaimed material with granularity being 1-9 mm, 13%-20% of a pyrophyllite and fused mullite compound with granularity being 1-9 mm, 14%-22% of a pyrophyllite and fused mullite compound with granularity being 0-1 mm, 2%-6% of silicon nitride with granularity being smaller than or equal to 1 mm, 0.5%-1.5% of a water reducer, 0.5%-1.5% of an antiknock agent, 2%-5% of a binder, 1%-3% of silicafine powder with granularity being smaller than or equal to 60 mu m, 2%-5% of activated alumina powder with granularity being 60 mu m and 1%-4% of silica powder with granularity being smaller than orequal to 50 mu m. The self-flowing castable has good heat insulation, good thermal shock resistance and high stripping resistance, has excellent characteristics of self-flowing, leveling and filling,is easy to construct and can be quickly baked without bursting, and purposes of self-flowing and quick drying are achieved.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to a quick-drying self-flowing castable for permanent layers of recycled molten iron ladles. Background technique [0002] The molten iron ladle is an open equipment for holding and transporting molten iron, and is a container for desulfurization pretreatment of molten iron. The refractory lining of the molten iron ladle will be in contact with high-temperature molten iron and slag for a long time, and will be eroded by stream flow and slag. The erosion of the lining refractory not only reduces the service life of the molten iron ladle, but also increases the content of other impurities in the molten iron. Therefore, it is very important for steelmaking plants to choose suitable iron ladle lining refractory materials to improve iron quality, stabilize operation, reduce accidents and improve production efficiency. [0003] Ladle lining refractory materials a...

AI Technical Summary

Problems solved by technology

In addition to objective reasons such as process technology and equipment, the main reason is the low proportion of recycled refractory materials

At present, the domestic recycling of waste refractories is still in its infancy, most of which are still in the experimental stage, and the recycling rate is not high, only reaching 20%. The recycling rate of waste refractory materials in the metallurgical industry is about 40%.