Installation for the production of steel by pre-smelting of pig iron
US4627601A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 24, 1985 |
| Grant date | Dec 9, 1986 |
| Priority date | — |
| Expiry date | Jun 24, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21C1/04
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.