Installation for the production of steel by pre-smelting of pig

Metallurgical apparatus – Means for melting or vaporizing metal or treating liquefied... – Refining means with separate metal-melting zone

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75 46, 266227, C21C 100

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active

046276017

ABSTRACT:
Installation according to the invention comprising a desilication and dephosphorization stage (A), followed by a decarburization stage and in which the pig iron to be pre-smelted is intended to form a bath whose free surface is maintained at a predetermined level (N.sub.1).
The dephosphorization comprises a reactor (1) comprising means (5, 6, 8) respectively for introducing the pig iron to be pre-smelted, for adding desilication and dephosphorization agents, and for creating an oxidizing atmosphere, as well as rabbling means (9). It also comprises a decanter (2) separated from the reactor (1) by a partition (3) having an opening (4) below the level (N.sub.1) and whose upper end is above the latter. The decanter comprises an immersed outlet opening (10) connected to the decarburization stage and an overflow (12) for evacuating the slag. The slag formed in the reactor (1) flows out in the decanter (2), overflows above the partition (3), and moves toward the overflow (12) which evacuated it.

REFERENCES:
patent: 3809379 (1974-05-01), Carbonnel
patent: 4084959 (1978-04-01), Yamamoto
patent: 4140521 (1979-02-01), Galnbek
patent: 4457777 (1984-06-01), MacGregor

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