US1786393A - Method of producing ferromolybdenum and ferrotungsten - Google Patents
Method of producing ferromolybdenum and ferrotungsten Download PDFInfo
- Publication number
- US1786393A US1786393A US359181A US35918129A US1786393A US 1786393 A US1786393 A US 1786393A US 359181 A US359181 A US 359181A US 35918129 A US35918129 A US 35918129A US 1786393 A US1786393 A US 1786393A
- Authority
- US
- United States
- Prior art keywords
- molybdic
- acid
- tungsten
- ferrotungsten
- tungstic acid
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C35/00—Master alloys for iron or steel
- C22C35/005—Master alloys for iron or steel based on iron, e.g. ferro-alloys
Definitions
- the invention relates to a method of producing ferromolybdenum by incorporating molybdic acid with molten iron inthe presence of reducing agents.
- a very homogeneous and complete alloy is obtained by using a molybdic acid and in the production of ferro-tungsten a tungstic acid-of very fine grain and maximum surface development, which is obtained by vaporization from the molten ore and if desired subsequent condensation in a manner known per se.
- a molybdic ortungstic acid of this kind satisfies all the preliminary chemical and physical conditions required for the production of a complete, homogeneous, solid solution of iron and molybdenum or tungsten.
- a further advantage of the invention consists in this that a molybdic or tungstic acid chosen according to the invention, is pure and uniform, so that the amount of carbon necessarj for its reduction, can be accurately measured and consequently the carbon content of the steel obtained can be accurately adjusted. Similarly any desired percentage of molybdenum or tungsten can be reliably adjusted.
- the allo obtained according to the invention di ers from those produced by other industrial methods, by its great purity and complete freedom from copper and sulphur.
- the latter is more particularly assured if use is made of a method in which the molybdic or tungstic acid is vaporized so to speak in fractional distillation from the ore in the presence of air or oxygen, as proposed by the same inventor for instance in his U. S. Patent No. 1,629,004.
- the vaporization point of which is below that of molybdenum or tungsten, so that in actual practice at the vaporization temperature of molybdenum or tungsten, these metals alone are expelled from the ore.
- the ore is then maintained in a molten state .during the evaporating out of the molybdenum or tungsten, there is also no possibility of any impurities being carried along by mechanical agencies.
- This method of obtaining molybdic or tungstic acid is alsoparticularly inexpensive, since use may be made both of ungraded ores and ores which contain natural impurities and are therefore less expensive than pure ores.
- What I claim is 8o 1.
- a method of producing ferromolybdenum or ferro-tungsten consisting in evaporating molybdic acid or tungstic acid of very fine grain and maximum surface development from molten ore and introducing the acid vapors directly into a bath of iron containing a reducing agent, as set forth.
- a method of producing ferromolybdenum or ferro-tungsten consisting in eva orating molybdic acid or tungstic acid 0 very fine grain and maximum surface develop- -ment from molten ore, subsequently condensing the same and introducing the said acids into a bath of iron containing a reducing agent, as set forth. :3
- a method of producing fcrromolybdenum or ferro-tungsten consisting in eva orating molybdic acid or tungstic acid o very fine grain and maximum surface developmentfrom molten ore and introducing the I :2: memes said acids into a bath of iron containing reducing agents, as set forth.
- a method of producing ferromolybdenum or ferro-tungsten consisting in eva orating molybdic acid or tungstic acid 0' very fine grain and maximum surface development from molten ore, subsequently condensing the same and introducing the said acids into a bath of iron containing reducing agents, as set forth.
Description
Patented Dec. 23, 1930 PAUL SCHWARZKOPF, OF REU'I'TE, AUSTRIA METHOD OI PQODU'CING FERROMOLYBDENUM AND FERROTUNGS'IEN v (I No Drawing. Application filed April 29, 1929, Serial No. 359,181, and in Germany May 22, 1926.
The invention relates to a method of producing ferromolybdenum by incorporating molybdic acid with molten iron inthe presence of reducing agents. According to the 5 invention, a very homogeneous and complete alloy is obtained by using a molybdic acid and in the production of ferro-tungsten a tungstic acid-of very fine grain and maximum surface development, which is obtained by vaporization from the molten ore and if desired subsequent condensation in a manner known per se.
A molybdic ortungstic acid of this kind satisfies all the preliminary chemical and physical conditions required for the production of a complete, homogeneous, solid solution of iron and molybdenum or tungsten.
The extreme importance of the invention will be clear from the fact that it is a question here of alloys, in which the content of molybdenum or tungsten is very small, and in which moreover, one single defective point, that is to say one point insutficiently alloyed with molybdenum or tungsten, may give rise to very great practical inconvenience.
A further advantage of the invention consists in this that a molybdic or tungstic acid chosen according to the invention, is pure and uniform, so that the amount of carbon necessarj for its reduction, can be accurately measured and consequently the carbon content of the steel obtained can be accurately adjusted. Similarly any desired percentage of molybdenum or tungsten can be reliably adjusted.
The allo obtained according to the invention di ers from those produced by other industrial methods, by its great purity and complete freedom from copper and sulphur. The latter is more particularly assured if use is made of a method in which the molybdic or tungstic acid is vaporized so to speak in fractional distillation from the ore in the presence of air or oxygen, as proposed by the same inventor for instance in his U. S. Patent No. 1,629,004. In that case in the first distillation stage all the impurities are expelled, the vaporization point of which is below that of molybdenum or tungsten, so that in actual practice at the vaporization temperature of molybdenum or tungsten, these metals alone are expelled from the ore. If the ore is then maintained in a molten state .during the evaporating out of the molybdenum or tungsten, there is also no possibility of any impurities being carried along by mechanical agencies.
This method of obtaining molybdic or tungstic acid is alsoparticularly inexpensive, since use may be made both of ungraded ores and ores which contain natural impurities and are therefore less expensive than pure ores.
Pure molybdic or tungstic acid vapors of this kind are introduced with articular advantage directly into the iron ath, since by this means obviously the largest possible surface is presented and the finest distribution obtained. The invention enables such a pro- 0 cedure, since use is made for alloying with I iron, of these vapors of molybdic or tungstic acid requiring no purification, and at the same time another known proposal is utilized, according to which the molybdic or tungstic acid is introduced into iron which is already provided with reducing agents for this acid,
but without using in such a case the vapors of molybdic acid known per se.
What I claim is 8o 1. A method of producing ferromolybdenum or ferro-tungsten consisting in evaporating molybdic acid or tungstic acid of very fine grain and maximum surface development from molten ore and introducing the acid vapors directly into a bath of iron containing a reducing agent, as set forth.
2. A method of producing ferromolybdenum or ferro-tungsten consisting in eva orating molybdic acid or tungstic acid 0 very fine grain and maximum surface develop- -ment from molten ore, subsequently condensing the same and introducing the said acids into a bath of iron containing a reducing agent, as set forth. :3
3. A method of producing fcrromolybdenum or ferro-tungsten consisting in eva orating molybdic acid or tungstic acid o very fine grain and maximum surface developmentfrom molten ore and introducing the I :2: memes said acids into a bath of iron containing reducing agents, as set forth.
s. A method of producing ferromolybdenum or ferro-tungsten consisting in eva orating molybdic acid or tungstic acid 0' very fine grain and maximum surface development from molten ore, subsequently condensing the same and introducing the said acids into a bath of iron containing reducing agents, as set forth.
In testimony whereof I have signed my name to this specification.
PAUL SCHWARZKOPF.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1786393X | 1926-05-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US1786393A true US1786393A (en) | 1930-12-23 |
Family
ID=7743249
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US359181A Expired - Lifetime US1786393A (en) | 1926-05-22 | 1929-04-29 | Method of producing ferromolybdenum and ferrotungsten |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US1786393A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2826494A (en) * | 1955-12-27 | 1958-03-11 | Ohio Commw Eng Co | Process for making alloys |
| FR2380348A1 (en) * | 1977-02-14 | 1978-09-08 | Amax Inc | VACUUM FUSION PROCESS FOR MANUFACTURING A FERROTUNGSTENE ALLOY |
| CN104975219A (en) * | 2015-05-29 | 2015-10-14 | 洛阳钼业集团金属材料有限公司 | Ferro-molybdenum smelting method based on effective oxygen content in roasted molybdenum concentrate |
| CN109913743A (en) * | 2019-04-28 | 2019-06-21 | 北京科技大学 | A method of molybdenum-iron is prepared using molybdenum carbide and iron oxide |
-
1929
- 1929-04-29 US US359181A patent/US1786393A/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2826494A (en) * | 1955-12-27 | 1958-03-11 | Ohio Commw Eng Co | Process for making alloys |
| FR2380348A1 (en) * | 1977-02-14 | 1978-09-08 | Amax Inc | VACUUM FUSION PROCESS FOR MANUFACTURING A FERROTUNGSTENE ALLOY |
| CN104975219A (en) * | 2015-05-29 | 2015-10-14 | 洛阳钼业集团金属材料有限公司 | Ferro-molybdenum smelting method based on effective oxygen content in roasted molybdenum concentrate |
| CN109913743A (en) * | 2019-04-28 | 2019-06-21 | 北京科技大学 | A method of molybdenum-iron is prepared using molybdenum carbide and iron oxide |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4140555A (en) | Nickel-base casting superalloys | |
| CN101426942A (en) | Brake discs excellent in resistance to temper softening and toughness | |
| Opiela et al. | Modification of non-metallic inclusions by rare-earth elements in microalloyed steels | |
| CN112760557B (en) | High-carbon high-chromium stainless steel for knives and scissors and preparation method thereof | |
| Stiller et al. | Mo precipitation in a 12Cr–9Ni–4Mo–2Cu maraging steel | |
| CN101426941A (en) | Brake disc having high temper softening resistance | |
| US1786393A (en) | Method of producing ferromolybdenum and ferrotungsten | |
| CN107287498A (en) | Ferrite nodular cast iron and its gravity foundry technology | |
| US2501138A (en) | Globular inclusion control for steel making | |
| Polishko | Deoxidation and modification of steels with reduced silicon content | |
| US2693414A (en) | Methods of casting titanium stabilized steel | |
| US2815279A (en) | Process of preparing high purity nickel | |
| Wang et al. | Effect of B addition on the microstructure and properties of Zn-3.5 Al biodegradable zinc alloy | |
| US2721797A (en) | Titanium-sulfur alloys | |
| US781808A (en) | Process of reducing vanadium. | |
| JP3548453B2 (en) | Manufacturing method of carbon steel with excellent drawability | |
| US1401927A (en) | Process of recovering molybdenum from molybdenite | |
| US1277034A (en) | Method of producing metals. | |
| US992423A (en) | Process of producing titanium alloys. | |
| SU562581A1 (en) | Modifier | |
| US1128313A (en) | Process of separating copper from nickel and matte and other products. | |
| SU876762A1 (en) | Modifier | |
| US1847044A (en) | Process for the improvement of nickel | |
| US2270643A (en) | Process for the production of nickel and cobalt alloys by aluminothermic reduction | |
| US616161A (en) | Process of reducing tin oxid or dross to pure metallic tin |