Title:
METHOD FOR PRODUCING LOW CARBON FERROCHROMIUM
Document Type and Number:
WIPO Patent Application WO/2021/010313
Kind Code:
A1
Abstract:
The present invention provides a method for producing low carbon ferrochromium, said method being capable of reducing the electric power consumption rate by increasing the mass ratio of additionally charged chromium ore with respect to a primary slag. A method for producing low carbon ferrochromium according to the present invention is provided with: a first step (S1) wherein chromium ore and quick lime are melted in an electric furnace; and a second step (S2) wherein a molten staring material (hereinafter referred to as a primary slag) melted in the first step (S1) is discharged into a reaction container that has a gas bottom-blowing device, and a reducing agent and a cold charge that contains additional chromium ore at a mass ratio of from 10% to 100% relative to the primary slag are charged into the reaction container, so that low carbon ferrochromium and a secondary slag are produced by stirring the materials by bottom-blowing an inert gas from the gas bottom-blowing device.
Inventors:
SUGIMORI HIROICHI (JP)
MORI MASAHIRO (JP)
MORI MASAHIRO (JP)
Application Number:
PCT/JP2020/026997
Publication Date:
January 21, 2021
Filing Date:
July 10, 2020
Export Citation:
Assignee:
JFE MAT CO LTD (JP)
International Classes:
C22C33/04; C22B9/10
Foreign References:
| JPH0551690A | 1993-03-02 | |||
| JP2011094210A | 2011-05-12 | |||
| JP2012041618A | 2012-03-01 | |||
| JP2003049235A | 2003-02-21 | |||
| JP2015137369A | 2015-07-30 | |||
| JP2013142189A | 2013-07-22 | |||
| JP2016148102A | 2016-08-18 |
Attorney, Agent or Firm:
SHIOJIMA, Toshiyuki (JP)
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