A resource-saving lightweight environmental protection tundish working lining and preparation method thereof

Abstract

The invention provides a resource-saving light-weight environment-friendly tundish working lining and a preparation method thereof. The tundish working lining is calculated according to the mass fraction, and its preparation raw materials include the following components: 20-120 parts of magnesite and forsterite in total, 5-30 parts of dead-burned magnesia fine powder, 1-20 parts of binder, 0.1-3 parts of paper fiber, and 1-10 parts of modifier. The dry material of the tundish working lining has a low natural bulk density and low volume density, which can reduce the consumption of refractory materials per ton of steel and improve the thermal insulation performance of the dry material; the material has high strength and high resistance to slag penetration; and the use of environmentally friendly binders does not Produces harmful and irritating gases, and is environmentally friendly.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to a resource-saving light-weight environment-friendly tundish working lining and a preparation method thereof. Background technique [0002] The tundish is one of the key devices in the steel continuous casting process. It is used to receive the molten steel from the ladle and inject it into the mold continuously, uniformly and stably. etc., and the performance of the working lining of the tundish is the key to improving the continuous casting technology. [0003] With the continuous development of metallurgical technology, the requirement for the refractory lining of the tundish is not simply long life, but the functionalization of the refractory has become more and more important. Especially in the smelting of high-quality steel and special steel, the requirements for the service life of the tundish refractory material are not very high, but the cleaning...

AI Technical Summary

Problems solved by technology

However, the density of magnesium dry material is generally high, and this type of dry material has two major disadvantages: 1) Due to its high thermal conductivity, the heat dissipation speed of the tundish lining is very fast, and the molten steel cools quickly, and consumes a large amount of thermal energy

2) Due to the high density, the consumption of refractory materials per ton of steel in the tundish remains high, which wastes mineral resources and increases the cost of refractory materials for enterprises

In addition, the current working lining of tundish dry materials is mainly combined with phenolic resin. During the baking process, as the temperature of the tundish rises, the phenolic resin gradually solidifies, and the cured resin decomposes at 200°C~800°C, releasing CO 2 , CO, CH 4 、H 2 and H 2 O and other gases have a great impact on the health of construction workers

Therefore, the existing refractory materials for the working lining of the tundish can no longer meet the requirements for its cleanliness and thermal insulation effect

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