Heating covering agent for molten steel

Abstract

The invention discloses a heating covering agent for molten steel. The heating covering agent for the molten steel is prepared from the following components in percentage by mass: 10% to 40% of organic carbon, 5% to 30% of MgOH, 5 % to 30% of fine carbon powder, 3 % to 15% of graphite nitride and 10% to 40% of Al2O3. The invention provides the heating covering agent for the molten steel, which has a relatively low cost, a wide application range, no pollution and a good heating and heat-preservation effect; the heating covering agent for the molten steel has prominent advantages of good dispersity, good heating and temperature-rising performance, high calories and small use amount, has a good separation property with the molten steel after the heating covering agent is cooled and completely has no influences on melting-down quality of remaining steel and the like; the requirement of raising the temperature on the surface of the molten steel can be completely met; the heating covering agent has no smog and waste gas, no dust pollution, no undesirable odor and no pollution to the environment; and a production process is simple and is suitable for industrial quantitative production.

Description

technical field [0001] The invention relates to the field of heating agents, in particular to a heating covering agent for molten steel. Background technique [0002] The constant temperature on the surface of steel castings is one of the key factors to control the quality of castings. The main function of the heat-generating covering agent of molten steel is to delay the premature cooling of the molten steel surface. It is necessary to control the cooling speed of molten steel during the transfer process of molten steel and during casting and molding of ladle. Traditional enterprise molten steel surface covering agents generally use plant ash, fly ash, rice husk, etc. as molten steel surface covering agents, because of their low heat content 2,000 kcal / kg), the effect of increasing the heat preservation time is also low, and the heat preservation effect is poor. When rice husk is used, it will produce a lot of smoke and PM2.5, and it will pollute the surface of molten stee...

AI Technical Summary

Problems solved by technology

It is necessary to control the cooling speed of molten steel during the transfer process of molten steel and during casting and molding of ladle. Traditional enterprise molten steel surface covering agents generally use plant ash, fly ash, rice husk, etc. as molten steel surface covering agents, because of their low heat content 2,000 kcal / kg), the effect of increasing the heat preservation time is also low, and the heat preservation effect is poor.

When rice husk is used, it will produce a lot of smoke and PM2.5, and it will pollute the surface of molten steel, which will affect the quality of molten steel.

[0003] In order to overcome the above problems, some people use expensive metal pure aluminum powder (Al); magnesium powder (Mg); pure iron powder (Fe); mixed combustion to achieve heat preservation effect, because it cannot be mass-produced and used in the industry, so the practicability is poor. In order to reduce industrial costs, only cheap quartz, iron oxide powder, corundum, spinel and other raw materials are added intentionally, which reduces the thermal insulation performance

Even so, the selection of raw materials is complicated and the cost of the preparation process is still high, and the scope of use is narrow

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