GB794327A - Improvements in or relating to the production of calcium - Google Patents

Improvements in or relating to the production of calcium

Info

Publication number
GB794327A
GB794327A GB30349/56A GB3034956A GB794327A GB 794327 A GB794327 A GB 794327A GB 30349/56 A GB30349/56 A GB 30349/56A GB 3034956 A GB3034956 A GB 3034956A GB 794327 A GB794327 A GB 794327A
Authority
GB
United Kingdom
Prior art keywords
per cent
calcium
gives
relating
production
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB30349/56A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of GB794327A publication Critical patent/GB794327A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B26/00—Obtaining alkali, alkaline earth metals or magnesium
    • C22B26/20—Obtaining alkaline earth metals or magnesium

Abstract

Calcium and silicon-aluminium alloy are obtained by distilling a mixture of Ca/Al and Si/Ca in an inert atmosphere under a pressure of 0.1 to 1.0m mercury and recovering the metallic calcium. The temperature may be 1320-1350 DEG C. and the atmosphere argon freed from nitrogen. The Al/Ca may be obtained by the alumino-thermic reduction of lime and the Si/Ca by electro-thermic reduction of silica with calcium or calcium carbide. The amount of Al and Si present in the condensed Ca is dependent on the relative proportions of Ca/Al and Si/Ca used, e.g. 64 per cent Ca/Al and 36 per cent Ca/Si gives Ca containing 0.17 per cent Si and 1.60 per cent Al, and 40 per cent Ca/Al and 60 per cent Si/Ca gives Ca containing 0.53 per cent Si and 1.1 per cent Al. Specification 510,759 is referred to.
GB30349/56A 1955-10-05 1956-10-04 Improvements in or relating to the production of calcium Expired GB794327A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR794327X 1955-10-05

Publications (1)

Publication Number Publication Date
GB794327A true GB794327A (en) 1958-04-30

Family

ID=9234021

Family Applications (1)

Application Number Title Priority Date Filing Date
GB30349/56A Expired GB794327A (en) 1955-10-05 1956-10-04 Improvements in or relating to the production of calcium

Country Status (1)

Country Link
GB (1) GB794327A (en)

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