US3374086A - Process for making strontium-bearing ferrosilicon - Google Patents

Process for making strontium-bearing ferrosilicon Download PDF

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Publication number
US3374086A
US3374086A US464581A US46458165A US3374086A US 3374086 A US3374086 A US 3374086A US 464581 A US464581 A US 464581A US 46458165 A US46458165 A US 46458165A US 3374086 A US3374086 A US 3374086A
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US
United States
Prior art keywords
strontium
ferrosilicon
alloy
celestite
calcium
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
Application number
US464581A
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English (en)
Inventor
Jr Henry G Goehring
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Elkem Metals Co LP
Original Assignee
Union Carbide Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Union Carbide Corp filed Critical Union Carbide Corp
Priority to US464581A priority Critical patent/US3374086A/en
Priority to GB23306/66A priority patent/GB1072509A/en
Priority to NO163229A priority patent/NO115805B/no
Priority to BE682270D priority patent/BE682270A/xx
Priority to DE1508273A priority patent/DE1508273C2/de
Priority to FR65551A priority patent/FR1483397A/fr
Priority to NL6608401A priority patent/NL6608401A/xx
Application granted granted Critical
Publication of US3374086A publication Critical patent/US3374086A/en
Assigned to ELKEM METALS COMPANY, A NEW YORK GENERAL PARTNERSHIP reassignment ELKEM METALS COMPANY, A NEW YORK GENERAL PARTNERSHIP ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: UNION CARBIDE CORPORATION, A NY CORP.
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C28/00—Alloys based on a metal not provided for in groups C22C5/00 - C22C27/00
    • 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

Definitions

  • the present invention relates to the manufacture of a strontium-containing ferrosilicon alloy for use as an addition to cast iron. More particularly, the present invention relates to the manufacture of a strontium-containing ferrosilicon alloy having a very low calcium content.
  • ferroalloys containing strontium are exceptionally eifective, but only when the calcium content is kept very low, e.g. on the order of 0.1%.
  • a particular embodiment of a process in accordance with the present invention comprises smelting in a submerged arc furnace a mixture of quartzite, celestite and carbonaceous reducing agent to provide a master alloy containing 15 to 55% strontium, 40 to 75% silicon, up to incidental impurities such as barium, iron, carbon, and having a calcium content not more than $4 the strontium content.
  • the alloy thus obtained is then added to molten high purity ferrosilicon alloy (at least 98.5% Fe-l-Si, less than 0.05 Ca) in an amount to provide in the ferrosilicon a strontium content of from at least 0.5%, suitably 0.5 to 1%. Higher strontium contents up to 4% and higher can also be efficiently provided.
  • the celestite employed in the charge contains at least 35% strontium and has a strontium to calcium ratio of at least 10 to l, and the amount of carbonaceous reducing agent is at least 90% of the stoichiometric amount required to reduce the strontium in the ore and the silicon in the quartzite to produce the desired alloy.
  • Suitable ratios of celestite and quartzite to produce various alloys are shown in Table I.
  • Example I A furnace mix blend for a 45% Sr strontium-silicon alloy was prepared as follows:
  • the mix was charged to an electric furnace lined with quartzite to a 21 inch diameter.
  • An 8 inch diameter graphite electrode was used in submerged arc operation at an electrode to hearth voltage of volts and a load of 450 kw.
  • Furnace operation was satisfactory and the intermediate alloy product was tapped without difiiculty. More than 4000 pounds of alloy were ultimately produced analyzing from 43.2 to 47.2% strontium and from 2.20 to 2.96% calcium.
  • the required amount of master alloy can be dissolved in 1800 lbs. of 75 ferrosilicon in less than 5 minutes.
  • the temperature of the ferrosilicon at the time of addition was about 2750 and a temperature loss of l25175 F. is experienced due to this alloy addition.
  • Average analysis of the final alloy obtained was as follows:
  • a process for producing strontium-containing ferrosilicon having a low calcium content which comprises smelting in a submerged arc furnace a mixture of quartzite, celestite and carbonaceous reducing agent to provide an alloy containing 15 to 55% strontium and 40 to 75 silicon, the strontium to calcium ratio in the celestite being at least 10:1; and subsequently adding the aforesaid alloy to molten ferrosilicon containing at least 98.5% Fe-l-Si, the amount of alloy added being sufficient to provide a strontium content of at least 0.5%.
  • a process for producing strontium-containing ferrosilicon having a low calcium content which comprises smelting in a submerged arc furnace a mixture of quartzite, celestite and carbonaceous reducing agent to provide an alloy containing about 45% strontium and about 50% silicon, the mixture being in the proportions of about 200'parts quartzite, 152 parts celestite, 46 parts charcoal, 120-parts'wo0d chips" and 96' parts coal, the strontium to calcium ratio in the celestite being at least 20 to 1; and subsequently adding the aforesaid alloy to molten ferrosilicon', at a temperature-of ab0ut'2750" F said ferrosilicon containing at least 985% Fe+Si, theamount of alloy added'being sufiicient to provide a strontium content of about 1%.

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)
  • Silicon Compounds (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Measuring Magnetic Variables (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
US464581A 1965-06-16 1965-06-16 Process for making strontium-bearing ferrosilicon Expired - Lifetime US3374086A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
US464581A US3374086A (en) 1965-06-16 1965-06-16 Process for making strontium-bearing ferrosilicon
GB23306/66A GB1072509A (en) 1965-06-16 1966-05-29 Process for making strontium-bearing ferrosilicon
NO163229A NO115805B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1965-06-16 1966-05-31
BE682270D BE682270A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1965-06-16 1966-06-08
DE1508273A DE1508273C2 (de) 1965-06-16 1966-06-15 Verfahren zur Herstellung von Stron tium enthaltendem Ferrosihzium
FR65551A FR1483397A (fr) 1965-06-16 1966-06-15 Procédé de production d'un ferrosilicium contenant du strontium
NL6608401A NL6608401A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1965-06-16 1966-06-16

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US464581A US3374086A (en) 1965-06-16 1965-06-16 Process for making strontium-bearing ferrosilicon

Publications (1)

Publication Number Publication Date
US3374086A true US3374086A (en) 1968-03-19

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ID=23844481

Family Applications (1)

Application Number Title Priority Date Filing Date
US464581A Expired - Lifetime US3374086A (en) 1965-06-16 1965-06-16 Process for making strontium-bearing ferrosilicon

Country Status (6)

Country Link
US (1) US3374086A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
BE (1) BE682270A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE1508273C2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB1072509A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
NL (1) NL6608401A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
NO (1) NO115805B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3527597A (en) * 1962-08-31 1970-09-08 British Cast Iron Res Ass Carbide suppressing silicon base inoculant for cast iron containing metallic strontium and method of using same
US4017310A (en) * 1975-12-31 1977-04-12 Union Carbide Corporation Method for making strontium additions to ferrosilicon
EP0030071A1 (en) * 1979-10-15 1981-06-10 Interox Chemicals Limited Process for the preparation of aluminium alloys
US4581203A (en) * 1983-06-28 1986-04-08 Skw Trostberg Aktiengesellschaft Process for the manufacture of ferrosilicon or silicon alloys containing strontium
US4666516A (en) * 1986-01-21 1987-05-19 Elkem Metals Company Gray cast iron inoculant
RU2414519C1 (ru) * 2009-12-01 2011-03-20 Общество с ограниченной ответственностью "Углемет" Способ получения комплексного кремнистого ферросплава
RU2703060C1 (ru) * 2019-06-27 2019-10-15 Общество с ограниченной ответственностью Новые перспективные продукты Технология Шихта для выплавки силикокальция

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3333954A (en) * 1963-08-10 1967-08-01 British Cast Iron Res Ass Manufacture of inoculants for cast iron

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3333954A (en) * 1963-08-10 1967-08-01 British Cast Iron Res Ass Manufacture of inoculants for cast iron

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3527597A (en) * 1962-08-31 1970-09-08 British Cast Iron Res Ass Carbide suppressing silicon base inoculant for cast iron containing metallic strontium and method of using same
US4017310A (en) * 1975-12-31 1977-04-12 Union Carbide Corporation Method for making strontium additions to ferrosilicon
EP0030071A1 (en) * 1979-10-15 1981-06-10 Interox Chemicals Limited Process for the preparation of aluminium alloys
US4581203A (en) * 1983-06-28 1986-04-08 Skw Trostberg Aktiengesellschaft Process for the manufacture of ferrosilicon or silicon alloys containing strontium
US4666516A (en) * 1986-01-21 1987-05-19 Elkem Metals Company Gray cast iron inoculant
US4749549A (en) * 1986-01-21 1988-06-07 Elkem Metals Company Gray cast iron inoculant
RU2414519C1 (ru) * 2009-12-01 2011-03-20 Общество с ограниченной ответственностью "Углемет" Способ получения комплексного кремнистого ферросплава
RU2703060C1 (ru) * 2019-06-27 2019-10-15 Общество с ограниченной ответственностью Новые перспективные продукты Технология Шихта для выплавки силикокальция

Also Published As

Publication number Publication date
GB1072509A (en) 1967-06-14
DE1508273C2 (de) 1973-12-13
NO115805B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1968-12-09
DE1508273B1 (de) 1969-11-06
BE682270A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1966-12-08
NL6608401A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1966-12-19

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Legal Events

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AS Assignment

Owner name: ELKEM METALS COMPANY, 270 PARK AVENUE, NEW YORK, N

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:UNION CARBIDE CORPORATION, A NY CORP.;REEL/FRAME:003882/0761

Effective date: 19810626

Owner name: ELKEM METALS COMPANY, A NEW YORK GENERAL PARTNERSH

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:UNION CARBIDE CORPORATION, A NY CORP.;REEL/FRAME:003882/0761

Effective date: 19810626