GB808400A - The production of moulded exothermic compositions - Google Patents

The production of moulded exothermic compositions

Info

Publication number
GB808400A
GB808400A GB1922/57A GB192257A GB808400A GB 808400 A GB808400 A GB 808400A GB 1922/57 A GB1922/57 A GB 1922/57A GB 192257 A GB192257 A GB 192257A GB 808400 A GB808400 A GB 808400A
Authority
GB
United Kingdom
Prior art keywords
compositions
aluminium
completely
amount
moulded
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
GB1922/57A
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 Ltd
Original Assignee
Foundry Services 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 Ltd filed Critical Foundry Services Ltd
Publication of GB808400A publication Critical patent/GB808400A/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
    • B22C—FOUNDRY MOULDING
    • B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
    • B22C1/02—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by additives for special purposes, e.g. indicators, breakdown additives
    • B22C1/08—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by additives for special purposes, e.g. indicators, breakdown additives for decreasing shrinkage of the mould, e.g. for investment casting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
    • B22D27/04—Influencing the temperature of the metal, e.g. by heating or cooling the mould
    • B22D27/06—Heating the top discard of ingots
    • 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)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

Rigid moulded aluminothermic compositions are produced from mixtures containing finely divided aluminium, an amount of oxidizing agent, including alkali nitrate, well below the amount necessary to react with the aluminium to oxidise it completely, 0.2-10 per cent of a fluoride, and water, by moulding the mixtures to shape and applying to the shaped compositions a small amount of a strongly alkaline solution, e.g. a solution of alkali hydroxide, carbonate or aluminate. If applied to one or a few points only of the shaped compositions an exothermic reaction occurs which spreads throughout the shapes to dry them completely. Examples of suitable compositions are given containing fireclay grog, millscale, aluminium of different particle sizes, sodium nitrate and cryolite or fluorspar. Specifications 627,678 and 775,380 are referred to.
GB1922/57A 1956-01-20 1957-01-18 The production of moulded exothermic compositions Expired GB808400A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ZA808400X 1956-01-20

Publications (1)

Publication Number Publication Date
GB808400A true GB808400A (en) 1959-02-04

Family

ID=25575132

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1922/57A Expired GB808400A (en) 1956-01-20 1957-01-18 The production of moulded exothermic compositions

Country Status (1)

Country Link
GB (1) GB808400A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1981001971A1 (en) * 1980-01-19 1981-07-23 Foseco Int Self drying aluminium-containing compositions

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1981001971A1 (en) * 1980-01-19 1981-07-23 Foseco Int Self drying aluminium-containing compositions

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