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Ferrochromium from domestic lateritic chromites.

Authors
Nafziger-RH
Source
J Met 1988 Jan; 40(9):34-37
NIOSHTIC No.
10006260
Abstract
This Bureau of Mines paper indicates that a high-carbon ferrochromium can be smelted satisfactorily from a chromite concentrate derived from domestic laterite residues in a small electric arc furnace, provided suitable flux additions are made and the phosphorus and sulfur levels can be decreased during the subsequent steelmaking process. From 78 to 97 pct of the chromium can be recovered in a ferroalloy containing 54 or higher wt pct chromium, depending on the amount of carbon used. Approximately 120 pct of the stoichiometric carbon requirement should be added to produce acceptable results. This can be divided equally between wood chips and a reductant such as metallurgical-grade coke. Chromium recovery and final slag basicity were decreased when less carbon was used. In general, techniques for smelting lateritic chromites parallel those for the production of high-carbon ferrochromium from off-grade chromites. On the basis of this research, an agglomeration procedure may not be required for this material as long as submerged arc conditions are maintained. Dusting and handling losses were comparable to those experienced in commercial chromite smelting operations that use coarser ores and concentrates.
CODEN
JOMTAA
Publication Date
19880101
Document Type
OP; Journal Article
Fiscal Year
1988
Identifying No.
OP 120-88
Issue of Publication
9
ISSN
0148-6608
NIOSH Division
ALRC
Source Name
Journal of Metals
State
OR
Page last reviewed: April 12, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division