US2190290A - Process for preparing alloys of calcium with aluminum - Google Patents
Process for preparing alloys of calcium with aluminum Download PDFInfo
- Publication number
- US2190290A US2190290A US189592A US18959238A US2190290A US 2190290 A US2190290 A US 2190290A US 189592 A US189592 A US 189592A US 18959238 A US18959238 A US 18959238A US 2190290 A US2190290 A US 2190290A
- Authority
- US
- United States
- Prior art keywords
- aluminum
- calcium
- alkaline earth
- earth metal
- molten
- 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 - Lifetime
Links
- 229910052782 aluminium Inorganic materials 0.000 title description 17
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title description 13
- 229910000882 Ca alloy Inorganic materials 0.000 title 1
- 238000004519 manufacturing process Methods 0.000 title 1
- 238000000034 method Methods 0.000 description 11
- 239000002893 slag Substances 0.000 description 7
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 6
- 235000011941 Tilia x europaea Nutrition 0.000 description 6
- 239000004571 lime Substances 0.000 description 6
- 229910000838 Al alloy Inorganic materials 0.000 description 5
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 5
- 229910045601 alloy Inorganic materials 0.000 description 5
- 239000000956 alloy Substances 0.000 description 5
- 229910052791 calcium Inorganic materials 0.000 description 5
- 239000011575 calcium Substances 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 4
- ULGYAEQHFNJYML-UHFFFAOYSA-N [AlH3].[Ca] Chemical compound [AlH3].[Ca] ULGYAEQHFNJYML-UHFFFAOYSA-N 0.000 description 3
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 3
- 150000001341 alkaline earth metal compounds Chemical class 0.000 description 3
- 150000001342 alkaline earth metals Chemical class 0.000 description 3
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical compound [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 3
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 description 3
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 2
- 229910000287 alkaline earth metal oxide Inorganic materials 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 101150006300 CALCR gene Proteins 0.000 description 1
- 240000007049 Juglans regia Species 0.000 description 1
- 235000009496 Juglans regia Nutrition 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229910000941 alkaline earth metal alloy Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229940043430 calcium compound Drugs 0.000 description 1
- 150000001674 calcium compounds Chemical class 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 235000020234 walnut Nutrition 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/026—Alloys based on aluminium
Definitions
- a temperature range was given as between 700 and 1500 C., and when working the process in order to obtain the residues in the form of unfused dross, a range of from 1000 to 1200 C.
- the temperature to which the aluminum and alkaline earth metal compound must be heated in order to obtain the formation 01' a molten slag depends upon the alkaline earth metal compound used.
- calcium aluminate calcium aluminate
- CaQAlzOa formed when a calcium compound is used has a and 1600- C., may be employed, for example,
- calcium aluminate can be added thereto as a iluxing agent or there may be used as stlrting material, an alkaline earth metal compound containing lime, (for example. dolo-,
- lime may conveniently be introduced on to the top of the bath of molten aluminum, heated (in any suitable furnace) tmmtemperature near to, but
- the process may be carried out continuously by tapping ofi some of the aluminum alloy from the upper partof the furnace and some of the calcium aluininate slag from or near the bottom of the furnace, and af'urther charge added Without interruption of the process.
- the slag produced in this case is a marketable productancl can (in an inexpensive manner, e; g. by
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Description
Patented Feb. 13, 1940 PROCESS roe cALcr M wrrn ar. g
' Gustaf Newton Kirsebom, Westbury-on-Trym, .1 Bristol, England, assignor to'Calloy Limited, London, England, a joint-stock company of England a. Application Februar 9, 1938,
Serial No. 189,592. 11, 1937 1 Claim.
In the specification of my prior United States Patent No. 1,935,245 a process is described for the preparation of aluminum alloys including I alkaline earth metal alloys, 9. specific applica- 5 tion of which process comprises heating an alkaline earth metal oxide or carbonate in a molten bath of aluminum below the surface thereof; for example, by placing on the top of a bath of molten aluminum, pieces of alkaline earth metal oxide or carbonate of suflicient size'to overcome the surface tension of molten aluminum and sink below the surface.
In describing the carrying out of the said process of my prior patent, a temperature range was given as between 700 and 1500 C., and when working the process in order to obtain the residues in the form of unfused dross, a range of from 1000 to 1200 C. was given, and when working, within this last-named ranged of from 1000-1200 C., in the case of the preparation of calcium aluminum alloys from lime, the calcium oxide was reduced to metallic calcium which alloyed with the excess aluminum, and the alu-' line earth metal oxides or carbonates or similar I oxygen-containing compounds are heated in a bath of molten aluminum below the surface of the latter at such a high temperature (as hereinafter indicated) that, while an alloy of aluminum and alkaline earth metal is formed, the residue of the mass is fused and converted into the form of a molten slag which latter constitutes a separate layer beneath the molten alloy of aluminum and alkaline earth metal.
The temperature to which the aluminum and alkaline earth metal compound must be heated in order to obtain the formation 01' a molten slag depends upon the alkaline earth metal compound used. Thus, calcium aluminate,
CaQAlzOa formed when a calcium compound is used has a and 1600- C., may be employed, for example,
melting point about 1350 C.; and in the case of In Great Britain February 1550 0.; and if the slag material present is one.
which would not be freely molten" within this temperature range, calcium aluminate can be added thereto as a iluxing agent or there may be used as stlrting material, an alkaline earth metal compound containing lime, (for example. dolo-,
mite) but in this case, calcium will also be introduced into the magnesium or other alkaline earth metal.
The present invention will now be described with reference to the preparation of specific alkaline earth-aluminum. alloys.
In the case of calcium aluminum alloys, lime may conveniently be introduced on to the top of the bath of molten aluminum, heated (in any suitable furnace) tmmtemperature near to, but
below the boiling point of aluminum, advantageously a temperature of 1500-l600 0.; the lime being in the form of pieces of. suiilcient size to overcome the surface tension of molten aluminum (for example, pieces ranging in size from 1 mm. to 100 mm.). Under these circumstances. the following reaction takes place:
,as a batch" process in any suitable electric or other furnace.
The following is an example of the procedure which may be adopted in preparing a calciumaluminum alloy in accordance with the invention when working as a batch" process:
lbs. aluminum and 50 lbs. of lime, the latter in pieces e. g. ranging from a few mm. diameter to walnut size, are heated together in an electric arc furnace to a. temperature of 1500-1600 C., for example, 1550", i. e. near to,
but below, the boiling point of aluminum. The pieces of lime sink into the molten aluminum and reduction takes place with the formation of metallic calcium which alloys with the excess aluminum. There is thus obtained to 76 lbs. of a calcium-aluminum alloy containing 20-25% of calcium and about 45 lbs. of calcium aluminate slag. In thus working as a batch" process, at the before-mentioned. temperatures,the re- 5 duction will be completed in about three quarters of an hour.
The process may be carried out continuously by tapping ofi some of the aluminum alloy from the upper partof the furnace and some of the calcium aluininate slag from or near the bottom of the furnace, and af'urther charge added Without interruption of the process.
Apart from the advantage of obtaining a clean separation of the metal alloy from the slag, the slag produced in this case is a marketable productancl can (in an inexpensive manner, e; g. by
grinding) be used for the preparation of cements
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2190290X | 1937-02-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2190290A true US2190290A (en) | 1940-02-13 |
Family
ID=10900745
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US189592A Expired - Lifetime US2190290A (en) | 1937-02-11 | 1938-02-09 | Process for preparing alloys of calcium with aluminum |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US2190290A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5419787A (en) * | 1994-06-24 | 1995-05-30 | The United States Of America As Represented By The Secretary Of The Air Force | Stress reduced insulator |
-
1938
- 1938-02-09 US US189592A patent/US2190290A/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5419787A (en) * | 1994-06-24 | 1995-05-30 | The United States Of America As Represented By The Secretary Of The Air Force | Stress reduced insulator |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| SE8200401L (en) | WAY TO RECOVER WORLDWIDE METALS | |
| US2190290A (en) | Process for preparing alloys of calcium with aluminum | |
| US2261906A (en) | Method of alloying magnesium with manganese | |
| US2823112A (en) | Flux compound | |
| US2448882A (en) | Method for deironing chromium ore | |
| US2054427A (en) | Process for the reduction of silicates other than alkaline earth metal silicates and the production of alloys of aluminium | |
| US3395011A (en) | Production of low silicon, medium to low, carbon ferro-manganese | |
| US2760859A (en) | Metallurgical flux compositions | |
| US3132024A (en) | Upgrading of oxidic columbiumtantalum materials | |
| US2266122A (en) | Silicon alloy | |
| US2257988A (en) | Process of producing aluminum alloys | |
| US2091950A (en) | Process for the preparation of alloys containing boron | |
| US3056658A (en) | Process for producing molybdenum disilicide | |
| US2237011A (en) | Simultaneous production of magnesium and low carbon ferroalloys | |
| US2207282A (en) | Method of treating alloys | |
| US1432289A (en) | Method of reducing metals and making alloys | |
| US1365091A (en) | Allot | |
| KR20150131623A (en) | Composition for Artificial Stone and Manufacturing Method of the same | |
| US2844458A (en) | Method of introducing titanium into molten metals and composition for such process | |
| US2266123A (en) | Silicon alloy and its use in the treatment of iron and steel | |
| GB689824A (en) | Electro-melting process for the extraction of precious metals from ashes or industrial residues | |
| US1252024A (en) | Method of manufacturing iron sulfid. | |
| US1306070A (en) | Process oe making compounds op the rare metals | |
| US2797988A (en) | Process of producing metal alloys of low impurity content | |
| US1925916A (en) | Process of producing alloys |