Coating capable of reducing heating oxidation burning loss of steel billets

Abstract

The invention relates to a manufacturing method for coating capable of reducing heating oxidation burning loss of steel billets and a using method of the coating and belongs to the technical fields of chemical materials and production process thereof. The chemical formula of the aid comprises the following components in percentage by weight: 10 to 15 percent of silica sol binder, 20 to 30 percent of aluminum polymetaphosphate curing agent, 12 to 18 percent of zirconium oxide, 20 to 30 percent of silicon carbide, 15 to 22 percent of aluminum oxide and 1 to 5 percent of polycarboxylic acid water reducing agent. The preparation method comprises the following steps: mixing the chemical agents with proper content and proper granularity uniformly; grinding and sieving by using 600-mesh sieve; and storing 10 to 15 percent of silica sol binder and 1 to 5 percent of polycarboxylic acid water reducing agent respectively and singly to obtain the coating. The invention provides preparation method of the chemical acid and a using method of the chemical acid. The chemical aid has a simple formula, an obvious effect, and low cost, and the using method is simple, and is suitable for reducing the heating oxidation burning loss of the steel billets. The aid can effectively reduce the heating oxidation burning loss of the steel billets by over 80 percent.

Description

technical field [0001] The invention relates to a coating for reducing heating, oxidation and burning loss of a billet, and belongs to the technical field of iron and steel metallurgy and chemical industry. Background technique [0002] Billets and ingots are generally heated or soaked in a heating furnace with an oxidative atmosphere at a certain temperature (1250-1300°C) for 2-3 hours or even longer before rolling. Therefore, the surface of the steel will undergo a strong oxidation reaction with the oxygen in the atmosphere, resulting in a large amount of oxidative burning, which will significantly reduce the yield of the steel. Oxidation and burning of steel parts due to various thermal effects is equivalent to 4% to 6% of the world's crude steel production. The high-temperature oxidation of the surface of the steel billet during the heating process alone causes the burning loss rate to be as high as 2.5%, and the average burning loss rate also reaches more than 1.0%. I...

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Problems solved by technology

[0007] However, the technical solutions of the above patents have the following deficiencies: they are only used for stainless steel, and the application range is narrow. The composition contains potassium and sodium salts, which have a corrosion effect on steel at high temperatures, and the anti-oxidation efficiency is relatively low.

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