GB870668A - Improvements in or relating to the production of metal castings and ingots - Google Patents

Improvements in or relating to the production of metal castings and ingots

Info

Publication number
GB870668A
GB870668A GB3854458A GB3854458A GB870668A GB 870668 A GB870668 A GB 870668A GB 3854458 A GB3854458 A GB 3854458A GB 3854458 A GB3854458 A GB 3854458A GB 870668 A GB870668 A GB 870668A
Authority
GB
United Kingdom
Prior art keywords
fluoride
composition
clo3
mno2
fe2o3
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
GB3854458A
Inventor
Frederick Molesworth Bunbury
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.)
Foundry Services International Ltd
Original Assignee
Foundry Services International Ltd
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 Foundry Services International Ltd filed Critical Foundry Services International Ltd
Priority to GB3854458A priority Critical patent/GB870668A/en
Publication of GB870668A publication Critical patent/GB870668A/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
    • C22B5/00—General methods of reducing to metals
    • C22B5/02—Dry methods smelting of sulfides or formation of mattes
    • C22B5/04—Dry methods smelting of sulfides or formation of mattes by aluminium, other metals or silicon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D7/00—Casting ingots, e.g. from ferrous metals
    • B22D7/06—Ingot moulds or their manufacture
    • B22D7/10—Hot tops therefor
    • B22D7/104—Hot tops therefor from exothermic material only
    • 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
    • C22B5/00—General methods of reducing to metals
    • C22B5/02—Dry methods smelting of sulfides or formation of mattes
    • C22B5/06—Dry methods smelting of sulfides or formation of mattes by carbides or the like

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mold Materials And Core Materials (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

An exothermic composition, which can be shaped to the form of slab or sleeve, comprises aluminium with an oxidizing agent stoichiometrically insufficient to oxidize completely all the aluminium present, and a fluoride such as Ca F2, BaF2, MgF2, AlF3 or alkali metal fluoride, or a complex fluoride, the whole composition being entirely free from alkali metal oxidizing salts. The oxidizing agents may consist of Fe2O3, MnO2, and preferably includes or consists of alkaline earth metal oxide, nitrate (e.g. Ba(NO3)2 or Ca(NO3)2 or chlorate (e.g. Ba (ClO3)2 or Ca (ClO3)2). An example of a composition in parts by weight is as follows: Al 10 to 50, Alkaline earth nitrate 2 to 15, MnO2 or Fe2O3 or both 0 to 20, fluoride or complex fluoride 0.1 to 20, filler (e.g. granulated grog) 30 to 60, binder (e.g. bentonite), about 5. Specifications 627,678, 769,719, 774,490, 774,491 and 812,583 are referred to.
GB3854458A 1958-11-28 1958-11-28 Improvements in or relating to the production of metal castings and ingots Expired GB870668A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3854458A GB870668A (en) 1958-11-28 1958-11-28 Improvements in or relating to the production of metal castings and ingots

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3854458A GB870668A (en) 1958-11-28 1958-11-28 Improvements in or relating to the production of metal castings and ingots

Publications (1)

Publication Number Publication Date
GB870668A true GB870668A (en) 1961-06-14

Family

ID=10404159

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3854458A Expired GB870668A (en) 1958-11-28 1958-11-28 Improvements in or relating to the production of metal castings and ingots

Country Status (1)

Country Link
GB (1) GB870668A (en)

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