A method for producing billet mold slag by using sintered red mud

Abstract

The invention discloses a method for producing billet mold covering slag by means of sintering process red mud, and relates to the field of metallurgical furnace materials. The method comprises the following steps of performing magnetic separation on the sintering process red mud, removing Fe2O3 and TiO2, and obtaining impurity-removed red mud; adding addition agents in the impurity-removed red mud, wherein the addition agents are mixture of sodium carbonate, fluorite, graphite and carbon black, and the mass ratio, by part, of the impurity-removed red mud to the sodium carbonate to the fluorite to the graphite to the carbon black is 100:10-15:5-15:5-10:5-15; performing high-speed stirring on the mixture of the red mud and the addition agents, performing low-speed stirring after watermill pulping, forming mud, and conveying the mud to a servo tank, spraying the mud into a spraying drying device, atomizing the mud to form fog particles, performing hot air drying on the fog particles, and forming the billet mold covering slag. According to the method for producing the billet mold covering slag by means of the sintering process red mud, industrial waste sintering method red mud is fully utilized, and the production cost of the billet mold covering slag is reduced.

Description

technical field [0001] The invention relates to the field of metallurgical charge, in particular to a method for producing billet crystallizer mold slag by using sintering red mud. Background technique [0002] With the further development of steelmaking and continuous casting technology and the improvement of users' requirements for billet quality, the high-efficiency continuous casting technology for the purpose of reducing steelmaking production costs and improving product quality has attracted more and more attention from various iron and steel enterprises. As the core material of continuous casting, billet mold mold slag plays a vital role in stabilizing the continuous casting process, expanding the variety of continuous casting, and improving the quality and output of steelmaking slabs. [0003] The current production of billet mold mold powder generally uses wollastonite, glass powder, power plant dust, limestone, soda ash, graphite, carbon black, fluorite, etc. as ra...

AI Technical Summary

Problems solved by technology

[0004] (1) Raw material ores not only come from complex sources, but also have unstable components. They need to be selected, analyzed, and tested for the active ingredients of each raw material. The processing process is relatively complicated and cumbersome, and it is difficult to guarantee the stability of product quality.

[0005] (2) The raw ore contains more harmful substances, such as Fe 2 o 3 、Al 2 o 3 , S, P and other impurities, these impurities will affect the surface and subcutaneous quality of the slab

[0006] (3) To produce pre-melted billet mold powder, some raw materials need to be pre-melted, and the cost of pre-melting is high, so that the price of billet mold powder remains high

[0009] In the existing public literature, there is no report on the use of sintering red mud to produce billet mold powder, and there is no report on the method of using sintering red mud to produce billet mold powder