US3907554A - Additive for steel baths - Google Patents
Additive for steel baths Download PDFInfo
- Publication number
- US3907554A US3907554A US480155A US48015574A US3907554A US 3907554 A US3907554 A US 3907554A US 480155 A US480155 A US 480155A US 48015574 A US48015574 A US 48015574A US 3907554 A US3907554 A US 3907554A
- Authority
- US
- United States
- Prior art keywords
- range
- iron
- molybdenum
- content
- containing material
- 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
- 239000000654 additive Substances 0.000 title claims abstract description 15
- 230000000996 additive effect Effects 0.000 title claims abstract description 14
- 229910000831 Steel Inorganic materials 0.000 title claims description 21
- 239000010959 steel Substances 0.000 title claims description 21
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 60
- 239000000203 mixture Substances 0.000 claims abstract description 34
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims abstract description 33
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 33
- 239000011733 molybdenum Substances 0.000 claims abstract description 33
- 229910052742 iron Inorganic materials 0.000 claims abstract description 30
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 23
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 23
- 239000002893 slag Substances 0.000 claims abstract description 12
- 238000004090 dissolution Methods 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 20
- 239000011230 binding agent Substances 0.000 claims description 11
- JKQOBWVOAYFWKG-UHFFFAOYSA-N molybdenum trioxide Chemical compound O=[Mo](=O)=O JKQOBWVOAYFWKG-UHFFFAOYSA-N 0.000 claims description 11
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 8
- 235000013379 molasses Nutrition 0.000 claims description 6
- 239000004484 Briquette Substances 0.000 claims description 4
- 229920001353 Dextrin Polymers 0.000 claims description 4
- 229920002472 Starch Polymers 0.000 claims description 4
- 235000019698 starch Nutrition 0.000 claims description 4
- 239000008107 starch Substances 0.000 claims description 4
- FYGDTMLNYKFZSV-MRCIVHHJSA-N dextrin Chemical compound O[C@@H]1[C@@H](O)[C@H](O)[C@@H](CO)OC1O[C@@H]1[C@@H](CO)OC(O[C@@H]2[C@H](O[C@H](O)[C@H](O)[C@H]2O)CO)[C@H](O)[C@H]1O FYGDTMLNYKFZSV-MRCIVHHJSA-N 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- APUPEJJSWDHEBO-UHFFFAOYSA-P ammonium molybdate Chemical compound [NH4+].[NH4+].[O-][Mo]([O-])(=O)=O APUPEJJSWDHEBO-UHFFFAOYSA-P 0.000 claims description 2
- 229940010552 ammonium molybdate Drugs 0.000 claims description 2
- 235000018660 ammonium molybdate Nutrition 0.000 claims description 2
- 239000011609 ammonium molybdate Substances 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 abstract description 2
- 239000002184 metal Substances 0.000 abstract description 2
- 229910001309 Ferromolybdenum Inorganic materials 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 238000005660 chlorination reaction Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000003610 charcoal Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000003292 diminished effect Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- MEFBJEMVZONFCJ-UHFFFAOYSA-N molybdate Chemical compound [O-][Mo]([O-])(=O)=O MEFBJEMVZONFCJ-UHFFFAOYSA-N 0.000 description 1
- 229910052961 molybdenite Inorganic materials 0.000 description 1
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 description 1
- 238000009828 non-uniform distribution Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C27/00—Alloys based on rhenium or a refractory metal not mentioned in groups C22C14/00 or C22C16/00
- C22C27/04—Alloys based on tungsten or molybdenum
Definitions
- a porous, solid-shaped additive for steel baths which comprises a composition having, by weight, a molybdenum content in the range 40 to 95%, an iron content in the range to 50% and a carbon content in the range 0.2 to 5%, the density of the composition being in the range 2.5to 5.0 grams per cubic centimeter.
- the preferred molybdenum content is 60 to 70%, the preferred iron content is to 30% and the preferred carbon content is 0.2 to 1.5%.
- Up to 10% by weight of impurities can generally be tolerated in the composition. The impurities will tend toaccumulate in the slag in the steel bath and will be removed along with it.
- a density within the claimed range is found important in order to ensure that the added composition rests at the interface between the molten steel and the molten slag layer. Upon contact with the surface of the molten steel the composition begins to melt and to dissolve into the melt. Preferably the density is within the range 3 to 4 grams'per cubic centimeter.
- composition In order to fall within the desired density range the composition must be held together with a suitable binder.
- suitable binder examples include molasses, starch,-dextrine and tar.
- the invention also provides a method for making a composition having, by weight, a molybdenum content in the range 40 to 95%, an iron content in the range 10 to 50%, a carbon content in the range 0.2 to 5%, a binder and a density in the range 2.5 to 5 grams per cubic centimeter. which comprises adding together a molybdenum-containing material, an iron-containing material, carbon and a binder and heating the mixture so formed at a temperature in the range 850 to 1500C for a period of at least one hour.
- the molybdenumcontaining material is preferably molybdenum trioxide. This is the product of roasting molybdenum ore. Pure molybdenum trioxide can be employed if desired and a partly-reduced molybdenum trioxide is also suitable.
- the iron is preferably introduced in the form of iron oxide, conveniently in the form of iron scale. (for example millscale.) but other forms are possible. for ex ample ground iron.
- the iron-containing material is preferably of a particle size below 30 mesh 885.
- the proportion of binder required depends on the particular binder employed but is typically within the range 2 to 5% of the weight of the composition.
- the binder can if desired be employed in admixture with water.
- I 1 i The preferred temperature range for forming the composition is 1 150 and 1 350C. Working within this range is found to give a more reduced product, improved strength and less risk of fusion. It also gives a density greater than can be achieved below 1 150C.
- the materials to form the composition are introduced into a cold furnace which is then allowed to warm up to the desired temperature level.
- the gradual raising of the temperature of the introduced mixture is conveniently achieved by passing the mixture through a tunnel in which the temperature gradually builds up from ambient to the desired working temperature.
- a particular advantage of the present invention is that the composition lends itself to being formed into a'variety of convenient types. Thus it can be formed into nodules, briquettes and can if desired be extruded into rods. Whichever form is chosen, the discrete lumps of the composition to be added to the steel bath are preferably of a weight in the range 50 to grams.
- the products of the invention have the advantage of.
- the process of the invention is advantageous in being readily employable in a continuous manner. Moreover, since the product can be obtained in the form of small nodules of briquettes of predetermined weight, the addition of carefully controlled quantities of molybdenum to the steel is simplified.
- EXAMPLE 1 A mixture of 260 grams roasted molybdenite, 86 grams millscale (FeO) and 30 grams carbon was placed in a glass bottle of l kilogram capacity which was placed on revolving rollers for one hour to mix the contents. 15 grams molasses in 10 ml water was then added with stirring.
- the wet mixture was formed into briquettes using a pressure of tons per squareinch.
- the briquettes were packed in carbon in a carbon crucible and introduced into an induction furnace.
- the purpose of the enveloping layer of carbon was to protect the briquettes from the oxidising atmosphere in the furnace.
- the temperature in the furnace was increased over a period of l /2 hours up to a temperature of 1320C. The temperature was maintained at this level for 2 hours and the crucible was then allowed to cool to room temperature.
- the briquettes so formed each weighed about 67 grams, had a density of 2.8 grams per cubic centimeter and the following analysis, by weight:
- Example 2 The procedure of Example I was followed. using a mixture of 290 grams roasted molybdenum, 75 grams millscale, 35 grams of charcoal and 15 grams of molasses. The temperature in the furnace was raised from ambient to l,33()C.
- the briquettes so formed each weighed about 68 grams, had a density of 3.8 grams per cubic centimeter and, the following analysis, by weight:
- An additive for molten steel baths which consists lybdenum content is 60 to the iron content is 20 to 30% and the carbon content is 0.2 to 1.5%.
- a method for making a porous, solid-shaped composition which permits ready dissolution at the interface between the molten steel and molten slag layer in a molten steel bath consisting essentially of and having by weight, a molybdenum content in the range 40 to an iron content in the range 10 to 50%, a carbon content in the range 0.2 to 5%, and a binder being a member of the group consisting of molasses, starch, dextrine and tar and a density in the range 2.5 to 5 grams per cubic centimeter which consists essentially of adding together a molybdenum-containing material, an iron-containing material, carbon and said binder and heating the mixture so formed at a temperature in the range 850 to 1500C. for a period of at least one hour. 1
- An additive as claimed in claim 1 whcrein'the solidshapeis in the form of a briquette having a density of 2.8 and an analysis by weight of 64.6 molybdenum, 25.371 iron, 0.9% carbon and a slag content of 8.0%.
- An additive as claimed in claim ,1 wherein the solid shape is in the form of a briquette having a density of 3.8 and an analysis by weight of 69.4% molybdenum, 19.8% iron, 1.2% carbon and a slag content of 8.8%.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2856873A GB1472255A (en) | 1973-06-15 | 1973-06-15 | Additive for steel baths |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3907554A true US3907554A (en) | 1975-09-23 |
Family
ID=10277677
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US480155A Expired - Lifetime US3907554A (en) | 1973-06-15 | 1974-06-17 | Additive for steel baths |
Country Status (13)
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4101316A (en) * | 1976-04-14 | 1978-07-18 | Ferrolegeringar Trollhatteverken Ab | Conversion of molybdenite concentrate to ferro-molybdenum and simultaneous removal of impurities by direct reduction with sulfide forming reducing agents |
| EP0953061A4 (en) * | 1997-01-17 | 2000-04-26 | Kennecott Holdings Corp | MOLYBDEANOXIDE BRIKETTS AND METHOD FOR THE PRODUCTION THEREOF |
| RU2401871C2 (ru) * | 2005-03-21 | 2010-10-20 | ЭйТиАй ПРОПЕРТИЗ, ИНК. | Формованные изделия, содержащие лигатуру, и способы их изготовления и использования |
| CN109778059A (zh) * | 2019-01-21 | 2019-05-21 | 西安建筑科技大学 | 一种多孔钼铁合金及其制备方法和应用 |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| LU83362A1 (de) * | 1981-05-13 | 1983-03-24 | Alloys Continental Sa | Verfahren zum aufbereiten von pulverfoermigen metalloxyden als legierungszusaetze zu stahlschmelzen |
| US4366145A (en) * | 1981-06-24 | 1982-12-28 | Sandoz, Inc. | Soft gelatin capsule with a liquid ergot alkaloid center fill solution and method of preparation |
| US4758406A (en) * | 1987-11-25 | 1988-07-19 | Amax Inc. | Molybdenum addition agent and process for its production |
| CN119265471B (zh) * | 2024-12-10 | 2025-02-18 | 内蒙古必德工业技术有限公司 | 一种高强度不锈钢、制作方法及其系统 |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2186447A (en) * | 1939-01-28 | 1940-01-09 | Electro Metallurg Co | Method of making molybdenum and alloys of molybdenum |
| US2881068A (en) * | 1952-04-28 | 1959-04-07 | Wargons Ab | Method of treating a ferrous melt with a porous sintered metal body impregnated with a treating agent |
| US3446614A (en) * | 1965-03-30 | 1969-05-27 | Leonard Terence Johnson | Production of iron alloys |
| US3492114A (en) * | 1966-10-19 | 1970-01-27 | Sulzer Ag | Method for alloying highly reactive alloying constituents |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1532288A (fr) * | 1967-01-06 | 1968-07-12 | Ugine Kuhlmann | Agglomérés de molybdène pour emploi en aciérie et leur procédé de fabrication |
-
1973
- 1973-06-15 GB GB2856873A patent/GB1472255A/en not_active Expired
-
1974
- 1974-06-12 DE DE19742428459 patent/DE2428459A1/de active Pending
- 1974-06-12 PL PL1974171845A patent/PL90350B1/pl unknown
- 1974-06-13 LU LU70316A patent/LU70316A1/xx unknown
- 1974-06-13 AU AU70078/74A patent/AU7007874A/en not_active Expired
- 1974-06-14 ES ES427260A patent/ES427260A1/es not_active Expired
- 1974-06-14 JP JP49068024A patent/JPS5033110A/ja active Pending
- 1974-06-14 FR FR7420831A patent/FR2233412B1/fr not_active Expired
- 1974-06-14 BE BE145450A patent/BE816365A/xx unknown
- 1974-06-14 IT IT51534/74A patent/IT1013476B/it active
- 1974-06-14 AT AT491774A patent/AT339352B/de not_active IP Right Cessation
- 1974-06-17 US US480155A patent/US3907554A/en not_active Expired - Lifetime
- 1974-06-17 SE SE7407988A patent/SE7407988L/xx not_active Application Discontinuation
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2186447A (en) * | 1939-01-28 | 1940-01-09 | Electro Metallurg Co | Method of making molybdenum and alloys of molybdenum |
| US2881068A (en) * | 1952-04-28 | 1959-04-07 | Wargons Ab | Method of treating a ferrous melt with a porous sintered metal body impregnated with a treating agent |
| US3446614A (en) * | 1965-03-30 | 1969-05-27 | Leonard Terence Johnson | Production of iron alloys |
| US3492114A (en) * | 1966-10-19 | 1970-01-27 | Sulzer Ag | Method for alloying highly reactive alloying constituents |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4101316A (en) * | 1976-04-14 | 1978-07-18 | Ferrolegeringar Trollhatteverken Ab | Conversion of molybdenite concentrate to ferro-molybdenum and simultaneous removal of impurities by direct reduction with sulfide forming reducing agents |
| EP0953061A4 (en) * | 1997-01-17 | 2000-04-26 | Kennecott Holdings Corp | MOLYBDEANOXIDE BRIKETTS AND METHOD FOR THE PRODUCTION THEREOF |
| RU2401871C2 (ru) * | 2005-03-21 | 2010-10-20 | ЭйТиАй ПРОПЕРТИЗ, ИНК. | Формованные изделия, содержащие лигатуру, и способы их изготовления и использования |
| CN109778059A (zh) * | 2019-01-21 | 2019-05-21 | 西安建筑科技大学 | 一种多孔钼铁合金及其制备方法和应用 |
| CN109778059B (zh) * | 2019-01-21 | 2021-01-26 | 西安建筑科技大学 | 一种多孔钼铁合金及其制备方法和应用 |
Also Published As
| Publication number | Publication date |
|---|---|
| AT339352B (de) | 1977-10-10 |
| ES427260A1 (es) | 1976-07-01 |
| PL90350B1 (enrdf_load_stackoverflow) | 1977-01-31 |
| JPS5033110A (enrdf_load_stackoverflow) | 1975-03-31 |
| GB1472255A (en) | 1977-05-04 |
| FR2233412B1 (enrdf_load_stackoverflow) | 1978-02-17 |
| ATA491774A (de) | 1977-02-15 |
| SE7407988L (enrdf_load_stackoverflow) | 1974-12-16 |
| FR2233412A1 (enrdf_load_stackoverflow) | 1975-01-10 |
| BE816365A (fr) | 1974-09-30 |
| DE2428459A1 (de) | 1975-01-09 |
| AU7007874A (en) | 1975-12-18 |
| IT1013476B (it) | 1977-03-30 |
| LU70316A1 (enrdf_load_stackoverflow) | 1974-10-17 |
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