Casting powder
First Claim
1. In a method of continuous casting of steel, the use of a casting powder for application to the molten steel, the powder being free from uncombined carbon but including carbonates or nitrites as additives which decompose completely at a temperature of not more than 600°
- C. under atmospheric pressure under development of gas pursuant to the decompositioning, for generating a gas barrier against the influx of oxygen into the steel.
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Accused Products
Abstract
A casting powder for steel having, for example, ground blast furnace slag, and/or sand and caustic lime CaF2 as basic substances with further additives which include up to 10% of additives decomposing completely at temperatures below 600° C under development of gas whereby the mole-volume of developed gas per mole-weight gas-generating additive (m3 /Kg) is not smaller than 0.5. Ammonium nitrite or ammonium carbonate is preferred whereby the gaseous decomposition products will be nitrogen, water vapor and/or carbon dioxide.
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Citations
10 Claims
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1. In a method of continuous casting of steel, the use of a casting powder for application to the molten steel, the powder being free from uncombined carbon but including carbonates or nitrites as additives which decompose completely at a temperature of not more than 600°
- C. under atmospheric pressure under development of gas pursuant to the decompositioning, for generating a gas barrier against the influx of oxygen into the steel.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
Specification