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Recovery of Flake Graphite from Steelmaking Kish.

PB95104865

Publication Date	1994
Personal Author	Laverty, P. D.; Nicks, L. J.; Walters, L. A.
Page Count	31
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	Materials recovery Graphite Steel making Flow charts Feasibility Pilot plants Mineral economics Leaching Beneficiation Kish
Source Agency	Bureau of Mines
NTIS Subject Category	48A - Mineral Industries 68C - Solid Wastes Pollution & Control 99B - Industrial Chemistry & Chemical Process Engineering
Corporate Authors	Bureau of Mines, Reno, NV. Reno Research Center.
Document Type	Technical Report
Title Note	Report of investigations/1994.
NTIS Issue Number	199501

Recovery of Flake Graphite from Steelmaking Kish.

Recovery of Flake Graphite from Steelmaking Kish.
PB95104865

Publication Date	1994
Personal Author	Laverty, P. D.; Nicks, L. J.; Walters, L. A.
Page Count	31
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	Materials recovery Graphite Steel making Flow charts Feasibility Pilot plants Mineral economics Leaching Beneficiation Kish
Source Agency	Bureau of Mines
NTIS Subject Category	48A - Mineral Industries 68C - Solid Wastes Pollution & Control 99B - Industrial Chemistry & Chemical Process Engineering
Corporate Authors	Bureau of Mines, Reno, NV. Reno Research Center.
Document Type	Technical Report
Title Note	Report of investigations/1994.
NTIS Issue Number	199501