Title:
SLAG DETOXIFICATION METHOD AND LOW-CARBON FERROCHROME PRODUCTION METHOD
Document Type and Number:
WIPO Patent Application WO/2021/010312
Kind Code:
A1
Abstract:
Provided is a slag detoxification method for preventing generation of toxic hexavalent chromium in slag waste. A reducing agent and slag containing chromium oxide are introduced to an electric furnace, the slag is reduced by the reducing agent, and thereby chromium-containing metal and slag waste are produced (S11). The chromium oxide content (Cr2O3 mass%) in the slag waste is brought to 1.4 mass% or less and the basicity (CaO/SiO2) is brought to less than 1.3.
Inventors:
MORI MASAHIRO (JP)
SUGIMORI HIROICHI (JP)
SUGIMORI HIROICHI (JP)
Application Number:
PCT/JP2020/026996
Publication Date:
January 21, 2021
Filing Date:
July 10, 2020
Export Citation:
Assignee:
JFE MAT CO LTD (JP)
International Classes:
B09B3/00; C22B5/04; C22B9/10; C22C33/04; C22C35/00
Foreign References:
| JPH0551690A | 1993-03-02 | |||
| JPS6237340A | 1987-02-18 | |||
| JPS5210816A | 1977-01-27 | |||
| JPH01215950A | 1989-08-29 | |||
| JP2004520478A | 2004-07-08 | |||
| JP2002256323A | 2002-09-11 | |||
| JP2011094210A | 2011-05-12 |
Attorney, Agent or Firm:
SHIOJIMA, Toshiyuki (JP)
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