GB775380A - Improvements in or relating to exothermic mixtures - Google Patents
Improvements in or relating to exothermic mixturesInfo
- Publication number
- GB775380A GB775380A GB30520/54A GB3052054A GB775380A GB 775380 A GB775380 A GB 775380A GB 30520/54 A GB30520/54 A GB 30520/54A GB 3052054 A GB3052054 A GB 3052054A GB 775380 A GB775380 A GB 775380A
- Authority
- GB
- United Kingdom
- Prior art keywords
- mixture
- per cent
- aluminium
- sleeve
- self
- 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
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
- C22B5/06—Dry methods smelting of sulfides or formation of mattes by carbides or the like
-
- 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
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24V—COLLECTION, PRODUCTION OR USE OF HEAT NOT OTHERWISE PROVIDED FOR
- F24V30/00—Apparatus or devices using heat produced by exothermal chemical reactions other than combustion
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Metallurgy (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Cookers (AREA)
Abstract
An exothermic mixture comprises aluminium, an amount of oxidizing agent well below that needed to completely oxidize the aluminium, 1-10 per cent by weight of a fluoride to facilitate burning of the aluminium and lowering the temperature at which reaction starts, and a small quantity of alkali aluminate sufficient when moistened to set up a reaction with the free aluminium in the mixture. When the mixture is moulded with water into a sleeve or other shape, sufficient heat is generated to dry off the mixture and render the sleeve &c. self-drying. The alkali aluminate may be sodium aluminate in an amount between 0.5 and 1.5 per cent by weight of the mixture, and it may be added to the mixture before moistening or to the water used for moulding. The time delay before the self-drying action commences may be increased by the addition of small quantities of an acidic material such as boric acid, or according to the Provisional Specification, of base metals e.g. up to 5 per cent magnesium powder, with or without 0.01-0.25 per cent of salts of noble metals, e.g. copper sulphate. Specification 627,678 is referred to.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB30520/54A GB775380A (en) | 1954-10-22 | 1954-10-22 | Improvements in or relating to exothermic mixtures |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB30520/54A GB775380A (en) | 1954-10-22 | 1954-10-22 | Improvements in or relating to exothermic mixtures |
Publications (1)
Publication Number | Publication Date |
---|---|
GB775380A true GB775380A (en) | 1957-05-22 |
Family
ID=10308950
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB30520/54A Expired GB775380A (en) | 1954-10-22 | 1954-10-22 | Improvements in or relating to exothermic mixtures |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB775380A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1981001971A1 (en) * | 1980-01-19 | 1981-07-23 | Foseco Int | Self drying aluminium-containing compositions |
JPH04123841A (en) * | 1990-09-14 | 1992-04-23 | Masamitsu Miki | Production of exothermic neck-down core and exothermic neck-down core |
JPH04123843A (en) * | 1990-09-14 | 1992-04-23 | Masamitsu Miki | Formation of exothermic material for casting |
US5285798A (en) * | 1991-06-28 | 1994-02-15 | R. J. Reynolds Tobacco Company | Tobacco smoking article with electrochemical heat source |
US5538020A (en) * | 1991-06-28 | 1996-07-23 | R. J. Reynolds Tobacco Company | Electrochemical heat source |
-
1954
- 1954-10-22 GB GB30520/54A patent/GB775380A/en not_active Expired
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1981001971A1 (en) * | 1980-01-19 | 1981-07-23 | Foseco Int | Self drying aluminium-containing compositions |
JPH04123841A (en) * | 1990-09-14 | 1992-04-23 | Masamitsu Miki | Production of exothermic neck-down core and exothermic neck-down core |
JPH04123843A (en) * | 1990-09-14 | 1992-04-23 | Masamitsu Miki | Formation of exothermic material for casting |
JPH0763799B2 (en) | 1990-09-14 | 1995-07-12 | 正光 三木 | Manufacturing method of pyrogenic neck-down core |
JPH0763800B2 (en) | 1990-09-14 | 1995-07-12 | 正光 三木 | Molding method for heat-generating materials for castings |
US5285798A (en) * | 1991-06-28 | 1994-02-15 | R. J. Reynolds Tobacco Company | Tobacco smoking article with electrochemical heat source |
US5357984A (en) * | 1991-06-28 | 1994-10-25 | R. J. Reynolds Tobacco Company | Method of forming an electrochemical heat source |
US5538020A (en) * | 1991-06-28 | 1996-07-23 | R. J. Reynolds Tobacco Company | Electrochemical heat source |
US5593792A (en) * | 1991-06-28 | 1997-01-14 | R. J. Reynolds Tobacco Company | Electrochemical heat source |
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