A kind of asp medium carbon steel continuous casting mold mold powder and preparation method thereof

Abstract

The invention discloses continuous casting crystallizer covering slag for ASP medium-carbon steel and a preparation method thereof. The covering slag comprises the following raw materials in percentage by weight: 0-6% of glass powder, 10-30% of premelting materials, 10-30% of wollastonite, 10.5-15.5% of fluorite, 4-8% of white alkali, 4-8% of carbon black, 4.5-8.5% of graphite, 0-5% of sodium fluoride, 5-8% of manganese carbonate, 4-9% of magnesia, 8-12% of bauxite, 0.5-3% of cryolite, 1-3% of adhesive, and 0.3-1% of water reducing agent. The covering slag optimizes the ratio, guarantees a certain melting speed while guaranteeing the insulation effect, has a certain liquid slag layer thickness, is uniformly consumed, guarantees smooth actuation of a continuous casting process, and produces an excellent casting blank.

Description

technical field [0001] The invention relates to a mold flux, in particular to a mold flux for a continuous casting mold for carbon steel in ASP and a preparation method thereof. Background technique [0002] With the advancement of science and technology, continuous casting technology is gradually becoming mature. However, due to the continuous improvement of steelmaking technology, the pace of steelmaking has accelerated, and the amount of steel tapping from the furnace has increased. Compared with steelmaking and subsequent steel rolling capabilities, the production capacity of continuous casting machines is still a restrictive link in the entire steel production process. . For this reason, in recent years, domestic and foreign iron and steel enterprises generally adopt continuous casting and rolling technology. Continuous casting and rolling has been widely favored and has broad development prospects due to its simplified process, short production cycle, high yield, and...

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Problems solved by technology

[0006] However, the production of the high-strength continuous casting mold powder in the above-mentioned patents all uses wollastonite, bauxite, etc. as base materials, fluorite, soda ash, etc. as fluxes, graphite, carbon black, etc. Carboxymethyl cellulose sodium salt (CMC) or dextrin is used as the binder, but the dispersion performance of CMC is weakened when it is above 300°C, while the temperature of the normal granulation tower is about 700°C. Since the particle strength of the product is 260~290Pa, The poor particle strength of the product leads to a ball forming rate of about 85%. The product has a low ball forming rate and a lot of dust. Part of the dust is recovered through dust removal, and part of the dust is scattered in the air, causing environmental pollution.