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Recovery of flake graphite from steelmaking kish.

Authors
Laverty-PD; Nicks-LJ; Walters-LA
Source
Reno, NV: U.S. Department of the Interior, Bureau of Mines, RI 9512, 1994 Jan; :1-23
Link
NIOSHTIC No.
10012435
Abstract
As part of its research efforts to encourage conservation and reuse of natural resources, the Bureau of Mines has developed a processing method to produce high-quality flake graphite from the steelmaking waste known as kish. The kish produced by current steelmaking practices is a mixture of graphite, desulfurization slag, and iron that is skimmed from the molten iron feed to the basic oxygen furnace. It is estimated that the graphite content of kish discarded by American steel plants is more than sufficient to meet the total U.S. demand for flake graphite. That need is now filled by natural graphite from foreign sources. Kish was treated by a combination of screening and hydraulic classification to produce a concentrate containing greater than 70 pct graphite. Leaching of the concentrate with hydrochloric acid solution gave a graphite product with 95 pct purity.
Keywords
Flow-charts; Feasibility; Pilot-plants; Mineral-economics; Leaching; Beneficiation; Materials-recovery; Graphite; Steel-making
Publication Date
19940101
Document Type
Report of Investigations
Fiscal Year
1994
NTIS Accession No.
PB95-104865
NTIS Price
A03
Identifying No.
RI-9512
NIOSH Division
RERC
Source Name
Reno, NV: U.S. Department of the Interior, Bureau of Mines, RI 9512
State
NV
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