Invention Grant
US07658782B2 Lime-based additive for steel smelting and the preparation method thereof 有权
石灰基冶炼添加剂及其制备方法

Lime-based additive for steel smelting and the preparation method thereof
Abstract:
This invention belongs to ferrous metallurgy field, and in particular relates to a lime-based additive for steel smelting which is used in the electric furnace refining and steel casting process for carbureting and deoxidation and the preparation method thereof. The lime-based additive for steel smelting comprises lime-based material and carbonaceous material, wherein the content of the lime-based material is 40-80 wt % relative to the total amount of the additive, and the remaining is the carbonaceous material; the lime-based material is a passivated CaO powder with a low flowability, or the mixture of the passivated CaO powder and CaCO3 powder, and the carbonaceous material is at least one of the coke, graphite, semi-coke powder and coal with carbon content not less than 85 wt %. When the additive has a shape of pellet, and it further comprises 1-5 wt % of agglomerant which has a microstructure of strip, streak or dendritic, and is at least one of MgO, Al2O3, and CaCO3.
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