US2552204A - Production of cast iron - Google Patents
Production of cast iron Download PDFInfo
- Publication number
- US2552204A US2552204A US123537A US12353749A US2552204A US 2552204 A US2552204 A US 2552204A US 123537 A US123537 A US 123537A US 12353749 A US12353749 A US 12353749A US 2552204 A US2552204 A US 2552204A
- Authority
- US
- United States
- Prior art keywords
- magnesium
- magnesia
- cast iron
- iron
- silicon
- 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
- 229910001018 Cast iron Inorganic materials 0.000 title claims description 19
- 238000004519 manufacturing process Methods 0.000 title description 6
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 57
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 52
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 34
- 239000000395 magnesium oxide Substances 0.000 claims description 29
- 229910052742 iron Inorganic materials 0.000 claims description 26
- 238000000034 method Methods 0.000 claims description 17
- 239000010703 silicon Substances 0.000 claims description 17
- 229910052710 silicon Inorganic materials 0.000 claims description 17
- 239000011777 magnesium Substances 0.000 description 25
- 229910052749 magnesium Inorganic materials 0.000 description 24
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 15
- 239000000203 mixture Substances 0.000 description 13
- 150000001875 compounds Chemical class 0.000 description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 11
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 10
- 229910000519 Ferrosilicon Inorganic materials 0.000 description 9
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 9
- 239000005864 Sulphur Substances 0.000 description 9
- 229910052799 carbon Inorganic materials 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 5
- 239000010439 graphite Substances 0.000 description 5
- 229910002804 graphite Inorganic materials 0.000 description 5
- 239000001095 magnesium carbonate Substances 0.000 description 5
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 5
- 229910001629 magnesium chloride Inorganic materials 0.000 description 5
- 229910001060 Gray iron Inorganic materials 0.000 description 4
- 239000010459 dolomite Substances 0.000 description 4
- 229910000514 dolomite Inorganic materials 0.000 description 4
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 3
- 235000011941 Tilia x europaea Nutrition 0.000 description 3
- 239000000440 bentonite Substances 0.000 description 3
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 3
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 3
- 229910001634 calcium fluoride Inorganic materials 0.000 description 3
- 238000005266 casting Methods 0.000 description 3
- 239000004568 cement Substances 0.000 description 3
- 239000004571 lime Substances 0.000 description 3
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 3
- 235000014380 magnesium carbonate Nutrition 0.000 description 3
- 239000004484 Briquette Substances 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 229940092782 bentonite Drugs 0.000 description 2
- 229910000278 bentonite Inorganic materials 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- 239000004115 Sodium Silicate Substances 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 150000001805 chlorine compounds Chemical class 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 150000004820 halides Chemical class 0.000 description 1
- 150000002681 magnesium compounds Chemical class 0.000 description 1
- ORUIBWPALBXDOA-UHFFFAOYSA-L magnesium fluoride Chemical compound [F-].[F-].[Mg+2] ORUIBWPALBXDOA-UHFFFAOYSA-L 0.000 description 1
- 229910001635 magnesium fluoride Inorganic materials 0.000 description 1
- UHNWOJJPXCYKCG-UHFFFAOYSA-L magnesium oxalate Chemical compound [Mg+2].[O-]C(=O)C([O-])=O UHNWOJJPXCYKCG-UHFFFAOYSA-L 0.000 description 1
- 159000000003 magnesium salts Chemical class 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229910021332 silicide Inorganic materials 0.000 description 1
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 description 1
- 229940080314 sodium bentonite Drugs 0.000 description 1
- 229910000280 sodium bentonite Inorganic materials 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/08—Making cast-iron alloys
- C22C33/10—Making cast-iron alloys including procedures for adding magnesium
Definitions
- This invention relates to the production of cast iron, and more particularly to methods for the introduction of magnesium into cast iron.
- magnesium may be introduced into cast iron by the use of a reducible magnesium compound such as magnesia or a compound convertible into magnesia by the action of heat; such compounds are for example magnesium carbonate, including magnesite, dolomite and chrom-magnesite, or organic magnesium salts such as magnesium oxalate.
- a reducible magnesium compound such as magnesia or a compound convertible into magnesia by the action of heat; such compounds are for example magnesium carbonate, including magnesite, dolomite and chrom-magnesite, or organic magnesium salts such as magnesium oxalate.
- magnesium is introduced into cast iron by bringing the molten iron into contact with magnesia or a magnesia-generating compound at temperatures above 1650 C., or with a mixture of magnesia (or a magnesiagenerating compound) and silicon or ferrosilicon at temperatures above 1100 C. If the iron originally contains more then 0.02 per cent by weight of sulphur the excess sulphur is first removed by the magnesium, and unless desulphurisation is the sole aim, sufficient magnesia or magnesia mixture must be employed to deal with this sulphur and to enter into solution in the iron.
- a convenient method of introducing the magnesium is to form a mixture of magnesia or burnt dolomite with a ferrosilicon containing, for example, 60-99% by Weight of silicon, into briquettes with a suitable binding agent such as sodium silicate, bentonite or, preferably, Sorel cement.
- the briquetted bonded mixture may be plunged beneath the surface of the molten iron above 1100 C. in the ladle, and held there until sufficient magnesium has dissolved in the iron.
- the briquettes should contain magnesia, lime and silicon (or the equivalent amount of ferrosilicon) in approximately the proportions indicated by the equation:
- the finely powdered mixture may be added 5% of water and 5% of magnesium chloride, which acts both as a binder and an accelerator.
- 5% of water and 5% of magnesium chloride acts both as a binder and an accelerator.
- a similar result may be obtained by treating the finely powdered mixture with up to 5% by weight of a 20% aqueous hydrochloric acid solution, whereby part of the oxides is converted into chlorides.
- the invention thus provides a new and practicable method of introducing magnesium into molten iron by the use of magnesia or a magnesia-generating compound.
- magnesia with or without silicon
- Magnesium is a well-known desulphurising agent, and the present invention provides a convenient method of reducing the sulphur content of iron during casting.
- magnesium metal dissolves in the iron, and an alloy containing as much as 1 of magnesium can be produced in this way.
- the iron contains sufiicient carbon, or additional carbon is provided, so that after casting a grey cast iron 'hypereutectic in respect of carbon results, the graphite in the cast iron wilLwhe'n the magnesium added is more than sufficient to reduce the sulphur content to below 0.02 per cent, be predominantly in the nodular form and the cast iron will have the greatly improved properties described in my Patent No. 2,488,511.
- a graphitising agent e. g. ferrosilicon, calcium s'ilicide, or graphite.
- a process for the introduction of magnesium metal into cast iron which comprises bringing the molten iron into contact with magnesia at temperatures at which reduction of the magnesia to magnesium takes place.
- magnesia is produced in situ by decomposition of a magnesia-generating compound.
- a process for the introduction of magnesium metal into cast iron which comprises bringing the molten iron at temperatures above 1100 C. into contact with magnesia and silicon.
- magnesia is produced in situ by decomposition of a'ma'gnesia-generatin'g compound.
- a process for the introduction'of magnesium metal into cast iron which comprises bringing the molten iron at temperatures above 1100 "C. into contact with a briquette compoun'ded'from .a magnesia-providing compound, selected from the group consisting of magnesia, magnesium carbonate, dolomite, chrome-magnesite and organic salts of magnesium, and a silicon-providing-compound selected from the group consisting of silicon and ferrosilicon, the briquette being held below the surface of the molten iron in the ladle until suflicient magnesium has dissolved.
- a process for the desulphurisation of cast iron which comprises bringing the molten iron at temperatures above 1100 0. into contact with magnesia and silicon, these ingredients being applied in such quantity as to provide enough magnesium metal to combine with the amount of sulphur to be removed.
- a process for the production of a grey cast iron in which the free carbon content is at least predominantly in the form of nodular graphite which comprises treating a suitable molten iron at temperatures above 1100 C. with magnesia and silicon in such quantity as to provide more than sufficient magnesium metal to reduce the sulphur content of the iron to 0.02%, a suitable molten iron for this purpose being one which on casting yields a grey cast iron hypereutectic in 'relati'o'nto carbon.
- a process as claimed in claim '8 which includes the further step of adding to the molten iron, after the introduction of the magnesium, a graphitising agent selected from the group cons'isting of ferrosilicon, calcium .silicide and graphite.
- a briquetted composition suitable for the introduction of magnesium into cast iron, containing magnesia, calcium oxide and :a :siliconproviding substance, the magnesia and thesil'icon being .present -substantially stoichiometric proportions, together with a magnesium chloride cement which acts as a binding and accelerating agent.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Description
Patented May 8, 1951 PRODUCTION OF CAST IRON Henton Morrogh, Alvechurch, Birmingham, England, assignor to The British Cast Iron Research Association, Alvechurch, Birmingham,
England No Drawing. Application October 25, 1949, Se-
rial No. 123,537. In Great Britain October 30,
11 Claims.
This invention relates to the production of cast iron, and more particularly to methods for the introduction of magnesium into cast iron.
Owing to its volatility and inflammability it is wasteful and dangerous to attempt to add magnesium metal to molten iron, and when it is desired to introduce-magnesium into cast iron it has been proposed to alloy the magnesium first with a metal such as nickel so as to minimize the loss of magnesium and to limit the risk of fire.
We have found that under certain conditions magnesium may be introduced into cast iron by the use of a reducible magnesium compound such as magnesia or a compound convertible into magnesia by the action of heat; such compounds are for example magnesium carbonate, including magnesite, dolomite and chrom-magnesite, or organic magnesium salts such as magnesium oxalate. We havefound that when molten iron at temperatures above 1650 C. is brought into contact with magnesia (or compounds generating magnesia at such temperatures) reduction of the oxide takes place and magnesium metal becomes available for the desulphurisation of the iron and, when the sulphur is or falls below 0.02 per cent, for solution in the iron.
It is known that silicon and ferrosilicon are able to reduce magnesium oxide at temperatures above 1100 C. to metallic magnesium. We have found that this reaction can be brought about by placing a mixture of magnesia (or magnesiagenerating compounds) and silicon or ferrosilicon in contact with molten iron above 1100 C., and the magnesium produced is, as above, available for desulphurising and dissolving in the iron.
It is an object of the present invention to provide a method for introducing magnesium into cast iron. Another object is to provide a method for the desulphurisation of cast iron by means of magnesium. A further object is to provide a method for the production of grey cast iron in which the free carbon is present as graphite predominantly in the form of nodules. A still further object is to provide a method for the production of alloys of iron and magnesium. Other objects will appear from the following description.
These objects are achieved by the present invention according to which magnesium is introduced into cast iron by bringing the molten iron into contact with magnesia or a magnesia-generating compound at temperatures above 1650 C., or with a mixture of magnesia (or a magnesiagenerating compound) and silicon or ferrosilicon at temperatures above 1100 C. If the iron originally contains more then 0.02 per cent by weight of sulphur the excess sulphur is first removed by the magnesium, and unless desulphurisation is the sole aim, sufficient magnesia or magnesia mixture must be employed to deal with this sulphur and to enter into solution in the iron.
The reduction by silicon or ferrosilicon occurs more readily in the presence of small proportions of halides, such as magnesium chloride, calcium fluoride, or magnesium fluoride.
A convenient method of introducing the magnesium is to form a mixture of magnesia or burnt dolomite with a ferrosilicon containing, for example, 60-99% by Weight of silicon, into briquettes with a suitable binding agent such as sodium silicate, bentonite or, preferably, Sorel cement. The briquetted bonded mixture may be plunged beneath the surface of the molten iron above 1100 C. in the ladle, and held there until sufficient magnesium has dissolved in the iron.
The briquettes should contain magnesia, lime and silicon (or the equivalent amount of ferrosilicon) in approximately the proportions indicated by the equation:
i. e. parts by weight of magnesia, 112 parts of lime and 28 parts of silicon. Dolomite burnt at 950 1000 C. provides a mixture of magnesia and lime in the proportion 45:55, which is sufiiciently near the stoichiometric proportion for the purpose. The ingredients are ground to pass at least -80 mesh and well mixed. If bentonite is to be used as binder, 5% of water is added to the finely powdered mixture and the whole is ground up with 5% of bentonite, briquetted and allowed to set, and finally dried at 200 C.
The addition of 5% of calcium fluoride to the finely powdered mixture improves its activity.
Alternatively, to the finely powdered mixture may be added 5% of water and 5% of magnesium chloride, which acts both as a binder and an accelerator. A similar result may be obtained by treating the finely powdered mixture with up to 5% by weight of a 20% aqueous hydrochloric acid solution, whereby part of the oxides is converted into chlorides.
The invention thus provides a new and practicable method of introducing magnesium into molten iron by the use of magnesia or a magnesia-generating compound.
In the absence of elementary silicon temperatures above 1650 C. are necessary; but if the magnesia is associated with silicon, reduction to magnesium metal takes place at 1100 C. and proceeds more readily at 1250 or higher. The
magnesia, with or without silicon, may be applied as a refractory lining to the walls of the furnace or the runs, or the ladle, always bearing in mind that unless the magnesia is associated with a due proportion of silicon temperatures above 1650 C. must be used. More conveniently the magnesia-silicon mixture is briquetted as described and held under the surface of the molten iron in the ladle, at temperatures of 1100" or higher, until suflicient has dissolved.
Magnesium is a well-known desulphurising agent, and the present invention provides a convenient method of reducing the sulphur content of iron during casting.
When magnesium has been used in quantity more than sufiicient to reduce the sulphur content of the cast iron to below 0.02%, magnesium metal dissolves in the iron, and an alloy containing as much as 1 of magnesium can be produced in this way.
If the iron contains sufiicient carbon, or additional carbon is provided, so that after casting a grey cast iron 'hypereutectic in respect of carbon results, the graphite in the cast iron wilLwhe'n the magnesium added is more than sufficient to reduce the sulphur content to below 0.02 per cent, be predominantly in the nodular form and the cast iron will have the greatly improved properties described in my Patent No. 2,488,511. As in the process of that patent it is advantageous, after the introduction of the nodulising agent (in this case magnesium) to add a graphitising agent, e. g. ferrosilicon, calcium s'ilicide, or graphite.
I claim:
1. A process for the introduction of magnesium metal into cast iron which comprises bringing the molten iron into contact with magnesia at temperatures at which reduction of the magnesia to magnesium takes place.
2. A-processas claimed in claim 1 in which the magnesia is produced in situ by decomposition of a magnesia-generating compound.
3. A process for the introduction of magnesium metal into cast iron which comprises bringing the molten iron at temperatures above 1100 C. into contact with magnesia and silicon.
4. A process as claimed in claim 3 in which the magnesia is produced in situ by decomposition of a'ma'gnesia-generatin'g compound.
5. A process for the introduction'of magnesium metal into cast iron which comprises bringing the molten iron at temperatures above 1100 "C. into contact with a briquette compoun'ded'from .a magnesia-providing compound, selected from the group consisting of magnesia, magnesium carbonate, dolomite, chrome-magnesite and organic salts of magnesium, and a silicon-providing-compound selected from the group consisting of silicon and ferrosilicon, the briquette being held below the surface of the molten iron in the ladle until suflicient magnesium has dissolved.
6. Aprocess as claimed in-claim 5 in which the riquette contains, in addition to the magnesiaproviding compound and the silicon-providing compound, an accelerator selected from the group consisting of calcium fluoride and magnesium chloride.
7. A process for the desulphurisation of cast iron which comprises bringing the molten iron at temperatures above 1100 0. into contact with magnesia and silicon, these ingredients being applied in such quantity as to provide enough magnesium metal to combine with the amount of sulphur to be removed.
8. A process for the production of a grey cast iron in which the free carbon content is at least predominantly in the form of nodular graphite which comprises treating a suitable molten iron at temperatures above 1100 C. with magnesia and silicon in such quantity as to provide more than sufficient magnesium metal to reduce the sulphur content of the iron to 0.02%, a suitable molten iron for this purpose being one which on casting yields a grey cast iron hypereutectic in 'relati'o'nto carbon.
9. A process as claimed in claim '8 which includes the further step of adding to the molten iron, after the introduction of the magnesium, a graphitising agent selected from the group cons'isting of ferrosilicon, calcium .silicide and graphite.
:10. A briquetted composition, suitable for the introduction of magnesium into cast iron, containing magnesia, calcium oxide and :a :siliconproviding substance, the magnesia and thesil'icon being .present -substantially stoichiometric proportions, together with a magnesium chloride cement which acts as a binding and accelerating agent.
11. A briquetted composition as claimed in claim 10 in which said magnesium chloride icement is Sor'el cement.
FI-IENTON MORROG'H.
REFERENCES CITED The following references are of record in "the file "of this patent:
UNITED STATES PATENTS Number Name :Date
1,119,643 Saklatwalla Dec. 1.1911 4 1,239,178 Grosvenor Sept. A, 1191-? 2,103,976 Suchy'et al. ?Dec. 28, 1937 2,282,241 Peake .May 5, 119.42 2,485,760 Millis et al. Oct. '25, I949
Claims (1)
- 3. A PROCESS FOR THE INTRODUCTION OF MAGNESIUM METAL INTO CAST IRON WHICH COMPRISES BRINGING THE MOLTEN IRON AT TEMPERATURES ABOVE 1100* C. INTO CONTACT WITH MAGNESIA AND SILICON.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2552204X | 1948-10-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2552204A true US2552204A (en) | 1951-05-08 |
Family
ID=10909899
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US123537A Expired - Lifetime US2552204A (en) | 1948-10-30 | 1949-10-25 | Production of cast iron |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US2552204A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2749237A (en) * | 1951-02-12 | 1956-06-05 | Jordan James Fernando | Method of adding magnesium to molten iron |
| US2750284A (en) * | 1951-12-22 | 1956-06-12 | Allis Chalmers Mfg Co | Process for producing nodular graphite iron |
| US2948605A (en) * | 1952-10-11 | 1960-08-09 | Allis Chalmers Mfg Co | Nodular iron |
| US2963364A (en) * | 1952-08-20 | 1960-12-06 | Air Reduction | Manufacture of cast iron |
| US3290142A (en) * | 1964-01-10 | 1966-12-06 | Pfizer & Co C | Process of preparing a reactive iron additive |
| US3309197A (en) * | 1962-10-16 | 1967-03-14 | Kusaka Kazuji | Nodular graphite cast iron containing calcium and magnesium |
| US3367772A (en) * | 1965-02-23 | 1968-02-06 | Dow Chemical Co | Method for treating ferrous metals |
| US3492114A (en) * | 1966-10-19 | 1970-01-27 | Sulzer Ag | Method for alloying highly reactive alloying constituents |
| US4291070A (en) * | 1979-12-05 | 1981-09-22 | United Kingdom Atomic Energy Authority | Coating of particles |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1119643A (en) * | 1913-04-30 | 1914-12-01 | Byramji D Saklatwalla | Process of producing alloy steels. |
| US1239178A (en) * | 1916-02-03 | 1917-09-04 | William M Grosvenor | Process for obtaining alkali-earth metals. |
| US2103976A (en) * | 1936-09-23 | 1937-12-28 | Magnesium Dev Corp | Production of magnesium from magnesiferous raw materials by thermal reduction |
| US2282241A (en) * | 1939-05-26 | 1942-05-05 | Dow Chemical Co | Making dolomite briquettes for use in the production of magnesium |
| US2485760A (en) * | 1947-03-22 | 1949-10-25 | Int Nickel Co | Cast ferrous alloy |
-
1949
- 1949-10-25 US US123537A patent/US2552204A/en not_active Expired - Lifetime
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1119643A (en) * | 1913-04-30 | 1914-12-01 | Byramji D Saklatwalla | Process of producing alloy steels. |
| US1239178A (en) * | 1916-02-03 | 1917-09-04 | William M Grosvenor | Process for obtaining alkali-earth metals. |
| US2103976A (en) * | 1936-09-23 | 1937-12-28 | Magnesium Dev Corp | Production of magnesium from magnesiferous raw materials by thermal reduction |
| US2282241A (en) * | 1939-05-26 | 1942-05-05 | Dow Chemical Co | Making dolomite briquettes for use in the production of magnesium |
| US2485760A (en) * | 1947-03-22 | 1949-10-25 | Int Nickel Co | Cast ferrous alloy |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2749237A (en) * | 1951-02-12 | 1956-06-05 | Jordan James Fernando | Method of adding magnesium to molten iron |
| US2750284A (en) * | 1951-12-22 | 1956-06-12 | Allis Chalmers Mfg Co | Process for producing nodular graphite iron |
| US2963364A (en) * | 1952-08-20 | 1960-12-06 | Air Reduction | Manufacture of cast iron |
| US2948605A (en) * | 1952-10-11 | 1960-08-09 | Allis Chalmers Mfg Co | Nodular iron |
| US3309197A (en) * | 1962-10-16 | 1967-03-14 | Kusaka Kazuji | Nodular graphite cast iron containing calcium and magnesium |
| US3290142A (en) * | 1964-01-10 | 1966-12-06 | Pfizer & Co C | Process of preparing a reactive iron additive |
| US3367772A (en) * | 1965-02-23 | 1968-02-06 | Dow Chemical Co | Method for treating ferrous metals |
| US3492114A (en) * | 1966-10-19 | 1970-01-27 | Sulzer Ag | Method for alloying highly reactive alloying constituents |
| US4291070A (en) * | 1979-12-05 | 1981-09-22 | United Kingdom Atomic Energy Authority | Coating of particles |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US2552204A (en) | Production of cast iron | |
| US3591367A (en) | Additive agent for ferrous alloys | |
| US3231368A (en) | Treatment of molten iron | |
| US5916827A (en) | Composite briquette for electric furnace charge | |
| US2726152A (en) | Addition agent and method for treating cast iron | |
| US4014684A (en) | Manufacture of steel | |
| US2980530A (en) | Method of producing nodular iron | |
| US1994378A (en) | Iron-bearing briquette and method of making the same | |
| US2569146A (en) | Metallurgical addition agent | |
| US3579325A (en) | Steel-making process employing an auxiliary composition | |
| US2948605A (en) | Nodular iron | |
| US3309197A (en) | Nodular graphite cast iron containing calcium and magnesium | |
| US3666445A (en) | Auxiliary composition for steel-making furnaces | |
| US3954446A (en) | Method of producing high duty cast iron | |
| US2661281A (en) | Production of cast iron | |
| US3290142A (en) | Process of preparing a reactive iron additive | |
| US1820998A (en) | Smelting of ores | |
| RU2657258C1 (en) | High-temperature magnesium flux for steel-fuel furnace and method of high-temperature magnesium flux producing for steel-fuel furnace | |
| US2765225A (en) | Treatment of cast iron | |
| US4299620A (en) | Lamellar graphite inoculant | |
| US2488513A (en) | Production of white cast iron | |
| JPS5856722B2 (en) | Desulfurization agent for molten iron | |
| US2631936A (en) | Process for the production of a ferrochrome-silicon-aluminum alloy | |
| US3918963A (en) | Addition agent for molten metals and process for making the same | |
| US2686946A (en) | Refining beryllium in the presence of a flux |