Desulfurization Agent Containing Bitumen, Method for the Production Thereof, and Use Thereof
AssigneeAlmamet Gmbh
InventorFrank Herwig
Life of this patent
Estimating the term…
Abstract
An agent for desulfurizing and/or for pre-desulfurizing, in particular for desulfurizing and/or pre-desulfurizing molten pig iron or molten steel, contains calcium oxide and bitumen.
Claims21
1-23. (canceled)
An agent for desulfurizing and/or pre-desulfurizing which contains 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 of manufacturing an agent for desulfurizing, the agent comprising calcium oxide, and bitumen;
- the method comprising the following steps:
- a) mixing of i) calcium oxide;
- ii) bitumen;
- iii) optionally at least one flux agent;
- iv) optionally, at least one further additive;
- as well as v) one or more calcium compounds selected from the group of members consisting of calcium hydroxide, calcium carbonate, and any desired mixtures of the aforesaid compounds;
- and
- b) grinding the mixture obtained in step a) to powder having a distribution of a range of grain sizes in which at least 80% by weight of the powder has a grain size of less than 32 μm.
A method for slag treatment comprising the step of
- adding a desulphurization 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.
Dependencies are inferred from the claim text.