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US 10,190,183 B2Granted
Method for desulfurizing
AssigneeAlmamet Gmbh
InventorFrank Herwig
Life of this patent
Estimating the term…
Abstract
The method employs a desulfurization agent that is introduced into a smelt of one of molten pig iron and molten steel. The desulfurization agent contains calcium oxide, bitumen and at least one flux agent, with the agent containing 1 to 10% by weight bitumen.
Claims12
A method for desulfurizing comprising the step of
- adding a desulfurization agent to a melt of at least one of a molten pig iron and a molten steel, said agent containing calcium oxide, bitumen as well as between 0.01 and 10% by weight of at least one flux agent, wherein the at least one flux agent is selected from the group of members consisting of multivalent alcohols, bituminous coal, silicone oils and mixtures thereof, and wherein the agent does not contain any calcium carbide, any magnesium or any magnesium alloy.
A method for desulfurizing comprising the steps of
- obtaining a smelt of one of molten pig iron and molten steel;
- and
- introducing a desulfurization agent into said smelt composed of
- calcium oxide or a mixture which contains at least 20% by weight of calcium oxide and one or more compounds selected from the group consisting of calcium hydroxide, calcium carbonate, and any desired mixtures of the aforesaid compounds;
- 1 to 10% by weight bitumen;
- 0.01 to 10% by weight of a flux agent to increase the flow behavior of said calcium oxide, said flux agent being selected from the group consisting of multivalent alcohols, bituminous coals, silicone oils, glycols, organopolysiloxanes, any desired mixtures thereof;
- and
- up to 10% by weight of an additive selected from the group consisting of cryolite, sodium borate, fluorite, and any desired mixtures thereof.
5 more elements
A method for desulfurizing comprising the steps of
- obtaining a smelt of one of molten pig iron and molten steel;
- and
- introducing a desulfurization agent into said smelt composed of
- calcium oxide or a mixture which contains at least 20% by weight of calcium oxide and one or more compounds selected from the group consisting of calcium hydroxide, calcium carbonate, and any desired mixtures of the aforesaid compounds;
- 2 to 6% by weight bitumen;
- 0.01 to 10% by weight of a flux agent to increase the flow behavior of said calcium oxide, said flux agent being selected from the group consisting of multivalent alcohols, bituminous coals, silicone oils, glycols, organopolysiloxanes, any desired mixtures thereof;
- and
- up to 10% by weight of an additive selected from the group consisting of cryolite, sodium borate, fluorite, and any desired mixtures thereof.
5 more elements
Dependencies are inferred from the claim text.