发明名称 |
Exothermic slag mixtures for removing sulphur and oxygen - from ferrous metals, where mixt. contains aluminium and sodium nitrate |
摘要 |
<p>Slag-forming mixt. for the refining of metals, contg. CaO, an oxidant, an oxidisable component, and fluorospar, the novelty being that the mixt. contains, by wt. 15-30% NaNO3 as oxidant; 8-25% of an Al-contg. material as the oxidisable component, and the ratio of the remaining components is: 30-70% CaO, balance fluorspar. The Al-contg. material is pref. Al powder, esp. sieve residues of Al chips contg. min. 50% Al and with size 0.5-1.5 mm; alternatively, aluminium casting dross of the same compsn. and size may be used. When 8-15% Al is used, the mixt. pref. also contains 6-8% of a material which includes min. 65% silicon. Refining of molten ferrous metals outside the furnace, when the metal is required for special applications demanding high purity w.r.t. sulphur and O2 contents and a low amt. of non-metallic inclusions. The above slag mixt. contains exothermic materials, thereby raising the slag temp. and increasing the degree of refining attainable.</p> |
申请公布号 |
FR2307877(A1) |
申请公布日期 |
1976.11.12 |
申请号 |
FR19750011667 |
申请日期 |
1975.04.15 |
申请人 |
DONETSKY INSTITUT CHERNOI METALL |
发明人 |
L. I. KRUPMAN, A. M. OKONISHNIKOV, A. E. SOCHNEV. B. V. GAVRONSKY, V. A. POPOV, A. N. KALASHNIK, V. S. CHUMACHENKO, V. M. GUDKEVICH, G. A. PANEV, V. I. DETOCHNO, S. A. TELESOV, L. M. POKRASS, A. M. OFENGENDEN, R. P. NESTEROVICH, G. G. ZHITNIK |
分类号 |
C21C7/064;C21C7/076;(IPC1-7):21C7/00 |
主分类号 |
C21C7/064 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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