US3905803A - Process for producing ingots by electric resistance melting particulate metal under slag - Google Patents

Process for producing ingots by electric resistance melting particulate metal under slag Download PDF

Info

Publication number
US3905803A
US3905803A US419380A US41938073A US3905803A US 3905803 A US3905803 A US 3905803A US 419380 A US419380 A US 419380A US 41938073 A US41938073 A US 41938073A US 3905803 A US3905803 A US 3905803A
Authority
US
United States
Prior art keywords
electrode
metal
particulate metal
slag
particulate
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
US419380A
Other languages
English (en)
Inventor
Paolo Bianchi
Aldo Ramacciotti
Eugenio Repetto
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.)
Centro Sperimentale Metallurgico SpA
Original Assignee
Centro Sperimentale Metallurgico SpA
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 Centro Sperimentale Metallurgico SpA filed Critical Centro Sperimentale Metallurgico SpA
Application granted granted Critical
Publication of US3905803A publication Critical patent/US3905803A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
    • C22B9/16—Remelting metals
    • C22B9/18—Electroslag remelting
    • 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

Definitions

  • ABSTRACT A process for producing metal alloys in the form of large-size ingots, by melting under electro-conductive slag, wherein the material forming the alloy is partly supplied as solid metal and partly as metal in powder, granules or pellets, for conciseness called particulate metal comprising the sequential operations of:
  • This method consists in conventionallycasting an ingot having the required weight, in removing the entire inner part along the longitudinal axis which is that generally higher in physical and chemical defects, and in filling the so produced recess, by a process according to the ESR techniques.
  • the purpose of this invention is to eliminate the cited drawbacks, connected with the known ESR processes using metal particles, and allowing one to overcome the problem of the low limits of weight in the produced ingots so as to allow ingots to be manufactured with uniform and controlled composition, free-from the'cited physical drawbacks and having a weight of some hundreds of tons.
  • a process forthe manufacture of metal alloys in the form of large-size ingots, by melting under electroconductive slag, wherein the material forming the alloy is supplied inpart in the form of solid metal and in part underthe form of particulate metal, i.e., powder or grains or pellets, wherein with the term particulate metal includes one or more metal elements or alloys, suitably mixed, said process being characterized by the combination of the following steps:
  • Theiequipmentwused for darryingJout this process-includes "a consumable:elect-rode syste m whichischaracterizedgby one or more cy-. lindricalwmetaltubes, preferablyone to four, for feedingxthe metal, each with a diameterivariable from 20 to 90 percent of the diameter of the ingot to be produced, saidrtubesbeing:extendableby means of welding of furtherlportionstof tube to that, or to those, which is, or are: being meltedsthroughout the duration ofthe meltiQgprOCS.. r t r ilhe present invention ⁇ will be now described with particular :reference?
  • FIGURE shows a sectional vertical view, of a scheme of a facility for the manufactureof ingots by the process according tothis'invention, 1
  • said tubular electrode 2 isprovided in its lower part with a recess orzone 5 downwarddelimited, at the start of the re-melting; by 'abottom wall 3 at least 35mm thick; closing the lower end ofthe electrode 2, and at its top, by a feeding plat efl which will be described in greater detail hereinafter;
  • the lower -tipofthe electrode 2 submerged into the slag is closedby ametal bottom'wall 3 fixed to the walls of the'electro'de2 in side"of which isintro'duced the metal particlesoy a feeding plate 4.
  • Thispla'te and the cited bottomwallB define a recess 5 which is thus partially filled withthe metal particles.
  • a controlled atmosphere will be established by a gas circulation, for instance using an inert gas such as argon.
  • an alternating or direct current (20 to 100 'V and 5,000 to60,000 A) is caused to pass through the circuit the electrodes of which arethe metal tube and the mold.
  • the metal tube 2 serving the function of an electrode will be downwards moved at a rate of speed comprised between 1 and 10 cm per min., and the particulate metal is fed so as to keep almost constant its volume within the recess 5.
  • Thisplateds supported by means different from said feeding ducts for the powder andfor the gas; and is located in fixed position with respect to the mouth of the mold 1, or insidethe mold itself, and in] thisfcase it: will be slow ly'upvvards moved in'ord'eflto-rhaintain constant its distance from 'themolten metal pool.
  • slag havingthe i CaF 40%; Al O 30%; CaO 24%; MgO 6% C 0.25; Mn 0.50; P 0.01; S 0.009; Si 0.25; Ni 3; Cr 0.30; O 60 ppm the balance consisting of Fe and minor impurities.
  • the used alternating current at 50 H had 50 V and 20,000 A.
  • the temperature of the slag was 1650 1,700C; the downwards feed rate of the electrode was about 3.3 cm/min., and the supply rate of the powder was 500 kgs/h.
  • This composition appeared to be substantially constant throughout the longitudinal and transverse sections of the ingot and also the mechanical properties appeared to be uniform.
  • An ESR process for producing metal alloy ingots by melting under electro-conductive slag comprising establishing in an electro-conductive mold a quantity of slag, introducing into said mold a hollow consumable metal electrode having a closed bottom immersed in said slag, introducing particulate metal into said hollow electrode, establishing an inert gas atmosphere in said hollow electrode, passing an electric current through said electrode and mold to melt said closed end of the electrode and to sinter said particulate metal adjacent said end of the electrode to form a sintered layer having a thickness sufficient to support the weight of the su perposed particulate metal, and supplying further particulate metal to the interior of said electrode while continuing to pass said electric current thereby progressively to melt said particulate metal and said electrode and progressively to build a said ingot in said mold.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Powder Metallurgy (AREA)
US419380A 1972-12-06 1973-11-27 Process for producing ingots by electric resistance melting particulate metal under slag Expired - Lifetime US3905803A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT54535/72A IT973940B (it) 1972-12-06 1972-12-06 Procedimento per la fabbricazione di leghe metalliche e relativa apparecchiatura

Publications (1)

Publication Number Publication Date
US3905803A true US3905803A (en) 1975-09-16

Family

ID=11287374

Family Applications (1)

Application Number Title Priority Date Filing Date
US419380A Expired - Lifetime US3905803A (en) 1972-12-06 1973-11-27 Process for producing ingots by electric resistance melting particulate metal under slag

Country Status (6)

Country Link
US (1) US3905803A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (1) JPS52821B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR2211538A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB1454911A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
IT (1) IT973940B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
SE (1) SE414318B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4007770A (en) * 1975-03-05 1977-02-15 Amax Inc. Semi-consumable electrode vacuum arc melting process for producing binary alloys
US4027720A (en) * 1975-02-25 1977-06-07 Vereinigte Edelstahlwerke Ag Method of producing homogenous ingots of high-melting, nitrogen-containing alloys
US4036278A (en) * 1974-11-11 1977-07-19 Centro Sperimentale Metallurgico S.P.A. Process for the production of large steel ingots
US4481030A (en) * 1983-06-01 1984-11-06 The United States Of America As Represented By The United States Department Of Energy Tantalum-copper alloy and method for making
US4729873A (en) * 1985-05-20 1988-03-08 Compania De Acero Del Pacifico S.A. De Process and apparatus for producing steel
CN104451177A (zh) * 2014-12-15 2015-03-25 重庆钢铁(集团)有限责任公司 一种金属电渣重熔冶炼气氛保护方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2541764A (en) * 1948-04-15 1951-02-13 Battelle Development Corp Electric apparatus for melting refractory metals
US2782245A (en) * 1954-04-02 1957-02-19 Ici Ltd Electric furnace for melting of high melting point metals or alloys
US2813921A (en) * 1954-05-10 1957-11-19 Rem Cru Titanium Inc Consumable electrode for melting of chemically reactive metals
US3234608A (en) * 1959-11-19 1966-02-15 Renault Continuous-casting method of melting metals in a slag medium by using consumable electrodes

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2541764A (en) * 1948-04-15 1951-02-13 Battelle Development Corp Electric apparatus for melting refractory metals
US2782245A (en) * 1954-04-02 1957-02-19 Ici Ltd Electric furnace for melting of high melting point metals or alloys
US2813921A (en) * 1954-05-10 1957-11-19 Rem Cru Titanium Inc Consumable electrode for melting of chemically reactive metals
US3234608A (en) * 1959-11-19 1966-02-15 Renault Continuous-casting method of melting metals in a slag medium by using consumable electrodes

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4036278A (en) * 1974-11-11 1977-07-19 Centro Sperimentale Metallurgico S.P.A. Process for the production of large steel ingots
US4027720A (en) * 1975-02-25 1977-06-07 Vereinigte Edelstahlwerke Ag Method of producing homogenous ingots of high-melting, nitrogen-containing alloys
US4007770A (en) * 1975-03-05 1977-02-15 Amax Inc. Semi-consumable electrode vacuum arc melting process for producing binary alloys
US4481030A (en) * 1983-06-01 1984-11-06 The United States Of America As Represented By The United States Department Of Energy Tantalum-copper alloy and method for making
US4729873A (en) * 1985-05-20 1988-03-08 Compania De Acero Del Pacifico S.A. De Process and apparatus for producing steel
CN104451177A (zh) * 2014-12-15 2015-03-25 重庆钢铁(集团)有限责任公司 一种金属电渣重熔冶炼气氛保护方法

Also Published As

Publication number Publication date
GB1454911A (en) 1976-11-10
DE2360883B2 (de) 1975-10-09
JPS4996925A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1974-09-13
SE414318B (sv) 1980-07-21
IT973940B (it) 1974-06-10
DE2360883A1 (de) 1974-06-12
FR2211538A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1974-07-19
JPS52821B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1977-01-11

Similar Documents

Publication Publication Date Title
US3234608A (en) Continuous-casting method of melting metals in a slag medium by using consumable electrodes
US3344839A (en) Process for obtaining a metallic mass by fusion
US2303973A (en) Method of and apparatus for production of master alloys
US3650311A (en) Method for homogeneous refining and continuously casting metals and alloys
CN112410592B (zh) 一种铝合金焊材铸锭的制备方法
US3752216A (en) Apparatus for homogeneous refining and continuously casting metals and alloys
CN103849794A (zh) 一种环保自润滑耐磨铜合金及其制备方法
US3947265A (en) Process of adding alloy ingredients to molten metal
US3905803A (en) Process for producing ingots by electric resistance melting particulate metal under slag
US4305451A (en) Electroslag remelting and surfacing apparatus
US2380238A (en) Method and apparatus for producing cast metal bodies
US2375107A (en) Method and apparatus for the continuous production of metal
US3895937A (en) Dynamic vacuum treatment to produce aluminum alloys
US2191479A (en) Manufacture of alloy ingots
US4207454A (en) Method for electroslag welding of metals
US4793971A (en) Grain refining
US3680163A (en) Non-consumable electrode vacuum arc furnaces for steel, zirconium, titanium and other metals and processes for working said metals
US2782245A (en) Electric furnace for melting of high melting point metals or alloys
US4185682A (en) Electroslag remelting and surfacing apparatus
KR850004026A (ko) 경금속입자가 함유된금속괴, 주조물 또는 형태를 갖는 물체의 제조방법과 장치
US3669178A (en) Direct reduction process and simultaneous continuous casting of metallic materials in a crucible to form rods
US4167963A (en) Method and apparatus for feeding molten metal to an ingot during solidification
US3493364A (en) Method of manufacturing alloy by using consumable electrodes
US3867976A (en) Electroflux melting method and apparatus
US3271828A (en) Consumable electrode production of metal ingots