Invention Grant
- Patent Title: Lime-based additive for steel smelting and the preparation method thereof
- Patent Title (中): 石灰基冶炼添加剂及其制备方法
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Application No.: US11966561Application Date: 2007-12-28
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Publication No.: US07658782B2Publication Date: 2010-02-09
- Inventor: Jizong Li , Jaemu Kim , Hao Du
- Applicant: Jizong Li , Jaemu Kim , Hao Du
- Applicant Address: CN Qingdao
- Assignee: Qingdao Deshipu Metallurgy Science & Technology Co., Ltd.
- Current Assignee: Qingdao Deshipu Metallurgy Science & Technology Co., Ltd.
- Current Assignee Address: CN Qingdao
- Agency: Blakely, Sokoloff, Taylor & Zafman LLP
- Priority: CN200610156166 20061230
- Main IPC: C22B1/243
- IPC: C22B1/243 ; C22B1/244 ; C22B11/10

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.
Public/Granted literature
- US20080156146A1 LIME-BASED ADDITIVE FOR STEEL SMELTING AND THE PREPARATION METHOD THEREOF Public/Granted day:2008-07-03
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