Process and additive for the ladle refining of steel

Details Process and additive for the ladle refining of steel Process and additive for the ladle refining of steel

1993-09-22

1995-03-14

Kastler, Scott

Specialized metallurgical processes, compositions for use therei

Compositions

Solid treating composition for liquid metal or charge

75303, C21C 7076

Patent

active

053973798

ABSTRACT:
A process of refining steel in a ladle using solid granules or briquettes made from recycled LMF slag and raw materials to make a desulfurizing addition, a slag conditioner or synthetic refining slag is described. The preferred recycled LMF slag material generally comprises of 35% to about 65% CaO; 10% to about 35% Al.sub.2 O.sub.3 ; 1% to about 10% SiO.sub.2 ; 3% to about 15% MgO; 0.3% to about 10% FeO; 0.1% to about 5% MnO; 0% to about 0.5% P.sub.2 O.sub.5 ; and 0.1% to about 0.5% S. The ladle refining additive comprises from about 10% to about 90% of a recycled ladle metallurgy furnace slag and the balance of raw materials selected from the group consisting of: a calcium oxide source; soda ash; fluorspar; borax; calcium carbonate; aluminum source; calcium aluminate; alumina source; metallic calcium, magnesium, sodium and their oxides, fluorides and carbides; and mixtures of all of the foregoing.

REFERENCES:
patent: 933357 (1909-09-01), Baraduc-Muller
patent: 1335370 (1920-03-01), Ellis
patent: 1459712 (1923-06-01), Bauret
patent: 2079901 (1937-05-01), Davidson
patent: 2237485 (1941-04-01), Hardt
patent: 2276671 (1942-03-01), Rentachler et al.
patent: 2361416 (1944-10-01), Reece
patent: 2993761 (1961-07-01), Erasmus
patent: 3027227 (1962-03-01), Coxey
patent: 3197306 (1965-07-01), Osborn et al.
patent: 3314782 (1967-04-01), Arnaud
patent: 3320052 (1967-05-01), Bowden
patent: 3436209 (1969-04-01), Lojas
patent: 3585025 (1971-06-01), Obst et al.
patent: 3649249 (1972-03-01), Halley et al.
patent: 3704744 (1972-12-01), Halley et al.
patent: 3754897 (1973-08-01), Derham et al.
patent: 3788840 (1974-01-01), Koenig et al.
patent: 3861906 (1975-01-01), Tipnis et al.
patent: 3897244 (1975-07-01), Murton
patent: 3899324 (1975-08-01), Corbett
patent: 3926246 (1975-12-01), Corbett et al.
patent: 3957502 (1976-05-01), Cull et al.
patent: 3964899 (1976-06-01), Jones et al.
patent: 3993474 (1976-11-01), Roberts
patent: 4039320 (1977-08-01), Uemura
patent: 4043798 (1977-08-01), Nashiwa et al.
patent: 4060406 (1977-11-01), Jones
patent: 4102690 (1978-07-01), Koper
patent: 4127407 (1978-11-01), Eitel et al.
patent: 4134946 (1979-01-01), Novy Velinger
patent: 4137072 (1979-01-01), Kawakami et al.
patent: 4139369 (1979-02-01), Kandler et al.
patent: 4142887 (1979-03-01), Luyckx
patent: 4180397 (1979-12-01), Naylor
patent: 4199351 (1980-04-01), El Gammal
patent: 4202692 (1980-05-01), Carini
patent: 4235632 (1980-11-01), Uher et al.
patent: 4248631 (1981-02-01), More et al.
patent: 4279643 (1981-07-01), Jackman
patent: 4280837 (1981-07-01), Shiozaki et al.
patent: 4303120 (1981-12-01), Carini
patent: 4312400 (1982-01-01), Carini
patent: 4317678 (1982-03-01), Faulring et al.
patent: 4318822 (1982-03-01), Braun et al.
patent: 4338142 (1982-07-01), Okuda et al.
patent: 4340426 (1982-07-01), Tabei et al.
patent: 4342590 (1982-08-01), Luyckx
patent: 4353739 (1982-10-01), Batham et al.
patent: 4361442 (1982-11-01), Faulring et al.
patent: 4364771 (1982-12-01), Cordier et al.
patent: 4373948 (1983-02-01), Faulring et al.
patent: 4373967 (1983-02-01), Roper, Jr. et al.
patent: 4420333 (1983-12-01), Takahashi et al.
patent: 4435210 (1984-03-01), Hirokawa et al.
patent: 4462834 (1984-07-01), LaBate
patent: 4528035 (1985-07-01), Simpson, Jr. et al.
patent: 4531972 (1985-07-01), Gueussier et al.
patent: 4541867 (1985-09-01), Neelameggham et al.
patent: 4570692 (1986-02-01), Wilson
patent: 4586956 (1986-05-01), Labate
patent: 4601751 (1986-07-01), Brandenberger et al.
patent: 4612046 (1986-09-01), Orcutt
patent: 4643766 (1987-02-01), Kieger
patent: 4652308 (1987-03-01), Nakashima et al.
patent: 4695318 (1987-09-01), Knauss, Jr. et al.
patent: 4705561 (1987-11-01), Green
patent: 4708737 (1987-11-01), Skach, Jr. et al.
patent: 4801328 (1989-01-01), Canfield
patent: 4814005 (1989-03-01), Thompson
patent: 4842642 (1989-06-01), Bowman
patent: 4849165 (1989-07-01), Schaefer
patent: 4880463 (1989-11-01), Saad
patent: 4943411 (1990-07-01), Henych et al.
patent: 4956009 (1990-09-01), Robison, Jr.
patent: 5002733 (1991-03-01), Breton et al.
patent: 5007958 (1991-04-01), Chung et al.
patent: 5028257 (1991-07-01), Tomkins et al.
patent: 5085691 (1992-02-01), Nakonechny et al.
patent: 5201941 (1993-04-01), Wells

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