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Publication numberUS2266122 A
Publication typeGrant
Publication dateDec 16, 1941
Filing dateJan 19, 1940
Priority dateApr 15, 1939
Publication numberUS 2266122 A, US 2266122A, US-A-2266122, US2266122 A, US2266122A
InventorsKinzel Augustus B
Original AssigneeElectro Metallurg Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Silicon alloy
US 2266122 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

Patented Dec. 16, 1941 SILICON ALLOY Augustus B. Kinzel, Douglaston, N. Y., assig'nor t, Electro Metallurgical Company, a corporation of West Virginia No Drawing. Application January 19, 19.40, Se-

giglg No. 314,575. In Great Britain April 15,

2 Claims.

This invention comprises improvements in silicon alloys and in particular silicon alloys of the class containing calcium.

Silicon-calcium alloys have long been used in metallurgical operations, for instance as deoxi- 'dizers and .degassifiers of molten steel and as graphitizers of cast iron. They have also been used in explosives, for instance in pyrotechnics.

Such alloys customarily contain about 15% to 40% calcium (part of the calcium being sometimes replaced by aluminum or manganese) and the remainder silicon except for incidental im- I purities such as iron. The silicon content is most usually between 50% and'65%.

Anobject of this invention is to provide an alloy, of the kind described above, which is cheaper to manufacture and which has anincreased field of utility than previously known alloys oi thiskind.

7 Another object is to provide a novel process formaking alloys of the kind described above.

I have now found that a partial substitution of calcium-by barium in such alloys provides certain advantages not to be expected from such substitution. =-A silicon-calcium barlum alloy containing 1 part of barium to 3 parts of calcium -is an example within this invention. It is premeans, great losses of alloys by volatilization. On the contrary, the silicon-calcium-barium alloys (with or without moderate proportions of aluminum or manganese or both) are dense enough to permit the melter to cover them with a protective slag which minimizes losses by volatilization.

Other advantages are that the silicon-calciumbarium alloys are more effective, volumefor volume and in some instances even pound for pound, than the silicon-calcium alloys of the same alkaline earth metal percentage, in metallurgical uses and in other uses such as in'explosives.

The alloy of the invention may be made by melting its ingredients under a suitable slag, for instance an alkaline earth metal silicate; or by reducing under a suitable slag a mixture of silica 'with the oxides (and/or carbonates) of calcium and barium, the reducing agent ,being carbon or aluminum; or-by reducing under a suitable islag a mixture of silica and barium oxide or carbonate,

metaland prevents excessive losses by volatilizatheretore impossible prevent, by ordinary "the ratio 'of barium to calcium being within the range of 1:3to3:1.

.2. Alloy as claimed in claim 1, in which the a silicon content is between 50% and 65%,

AUGUSTUS B. KENZEL. v

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2810639 *Aug 10, 1956Oct 22, 1957Kessler Harry HAlloy for addition to molten cast iron
US4024322 *Mar 24, 1975May 17, 1977Hooker Chemicals & Plastics CorporationBattery with silicon metal anodes
US4171232 *Aug 12, 1974Oct 16, 1979Th. Goldschmidt AgAluminothermic reaction mixture based on cupric oxide
US4581203 *Jun 25, 1984Apr 8, 1986Skw Trostberg AktiengesellschaftProcess for the manufacture of ferrosilicon or silicon alloys containing strontium
US5008074 *Apr 26, 1990Apr 16, 1991American Alloys, Inc.Inoculant for gray cast iron
Classifications
U.S. Classification420/578
International ClassificationC21C7/00
Cooperative ClassificationC21C7/0006
European ClassificationC21C7/00A