Title:
ADDITIVE FOR STEEL REFINING
Document Type and Number:
Japanese Patent JP3904345
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To obtain an additive for steel refining excellent in the balance to high desulfurization, high safety and non-erosiveness of a furnace lining, or the like, by preparing the additive for steel refining containing specifized ratios of CaO, CaCN2 and the other inorganic materials and composed of a specified range of granular material.
SOLUTION: The additive for steel refining containing 10-90 wt.% CaO, 3-70 wt.% CaCN2 and 5-70 wt.% inorganic materials except CaO and CaCN2 and composed of the granular material having ≤20 wt.% undersize of 0.2 mm grain and ≤10 wt.% oversize of 20 mm, is prepared. As CaCN2, synthetic calcium cyanamide, commercially available calcium cyanamide for industry, lime nitrogen, and the like, are used. As the inorganic materials, metal of Al, Si, Mg, Ca, alloys containing essentially of one or more kinds of these metallic components, carbonaceous material of carbon, graphite, carbon black, coke, coal, and inorganic compounds such as Al2O3, SiO2, MgO, Ca(OH)2, CaCO3, Na2CO3, CaF2, are suitably used.
Inventors:
Yuki Masanobu
Kaga Tetsuo
Kaga Tetsuo
Application Number:
JP17649699A
Publication Date:
April 11, 2007
Filing Date:
June 23, 1999
Export Citation:
Assignee:
DENKI KAGAKU KOGYO KABUSHIKI KAISHA
International Classes:
C21C7/064; C21C1/02; (IPC1-7): C21C7/064; C21C1/02
Domestic Patent References:
| JP55024983A | ||||
| JP55028305A | ||||
| JP11158523A | ||||
| JP7188728A | ||||
| JP56013425A | ||||
| JP2000109921A |