Environment-friendly dry material for continuous casting tundish and preparation method thereof

Abstract

The invention belongs to the technical field of refractory materials, and particularly relates to an environment-friendly dry material for a continuous casting tundish and a preparation method thereof. The dry material is characterized by comprising the following components in percentage by weight: 12%-16% of 5-3 mm waste magnesia-alumina-carbon particles, 32%-36% of 3-1 mm waste magnesia-alumina-carbon particles, 14%-22% of 1-0 mm waste magnesia-alumina-carbon particles, 5%-9% of 180-mesh waste prefabricated brick powder, 14%-18% of 240-mesh fused magnesite, 5%-10% of 1000-mesh active causticcalcined magnesite, 3.5%-5.5% of composite binder, and 0.5%-1% of a sintering agent. The dry material disclosed by the invention is put into a continuous casting tundish for use, can be used for morethan 60 furnaces, is used normally from the conditions of a permanent layer after use and the residual condition of a casting residual surface, is excellent in performance, and is easy to turn over;waste recycling is achieved, and the dry material has important significance in energy conservation, consumption reduction and environmental protection.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to an environment-saving dry material for continuous casting tundish and a preparation method thereof. Background technique [0002] In the continuous casting process, the tundish plays an irreplaceable role, and the working lining of the tundish is the basis for protecting the normal and safe operation of the tundish. The development of continuous casting tundish working lining can be divided into four stages: no working lining stage, insulation board stage, smearing or spraying material stage, and dry material stage. As the fourth-generation working lining material of continuous casting tundish, dry material has the advantages of thermal insulation board and spray coating, and has the advantages of convenient construction, fast heating speed, long life and easy unpacking. [0003] Most of the dry materials for continuous casting tundish are magnesia, and ...

AI Technical Summary

Problems solved by technology

[0003] Most of the dry materials for continuous casting tundish are magnesia, and the main raw material is fused magnesia. With the increase of market demand, the cost rises, which reduces the economic benefits of dry material production for continuous casting tundish.

When the ladle is under minor repair or overhaul, the remaining ladle lining bricks removed (including molten pool magnesia-aluminum carbon bricks and ladle prefabricated bricks, etc.) account for about 40-50% of the total amount of ladle lining bricks in the working layer. The space also pollutes the environment, which does not conform to the current concept of energy saving and environmental protection