National Technical Reports Library

The National Technical Information Service acquires, indexes, abstracts, and archives the largest collection of U.S. government-sponsored technical reports in existence. The NTRL offers online, free and open access to these authenticated government technical reports. Technical reports and documents in its repository may be available online for free either from the issuing federal agency, the U.S. Government Publishing Office’s Federal Digital System website, or through search engines.

Details

Utilization of Red Mud Residues From Alumina Production.

PB196608

Publication Date	1970
Personal Author	Fursman, O. C.; Mauser, J. E.; Butler, M. O.; Stickney, W. A.
Page Count	36
Abstract	Research was undertaken to study methods of utilizing red mud residues from production of alumina from bauxite. Pilot-plant tests were conducted using Jamaican and Surinam red muds. Both the carbon-lime-soda sinter process and electric-arc smelting with coke and limestone were employed to recover iron and alumina. Alumina recoveries of 85 to 90 percent were obtained by the sinter process; although iron recovery was about 80 percent, the magnetic product was finely divided and difficult to separate from the gangue. Smelting red muds in the electric-arc furnace produced a pig iron with 98-percent recovery of iron; up to 84 percent of the Al2O3 was recovered by leaching the calcium aluminate slag with Na2CO3 solution. A titania product assaying 96 percent TiO2 was recovered from the nonmagnetic portion of Surinam red mud sinter by extraction with H2SO4. Leached calcium aluminate slags and brown mud (from the combination Bayer process) are possible raw materials in the manufacture of portland cement. (Author)
Keywords	Bayer process Tailings Materials recovery Smelting Aluminum oxides Titanium dioxide Iron oxides Sintering Mud Iron Grinding(Comminution) Sodium carbonates Pilot plants Phase diagrams Magnetic separators Electric arc furnaces Red mud
Source Agency	Invalid Source Agency Code
NTIS Subject Category	48A - Mineral Industries
Corporate Authors	BUREAU OF Mines, Washington, D.C.
Document Type	Technical Report
Title Note	Rept. of investigations.
NTIS Issue Number	197105

Utilization of Red Mud Residues From Alumina Production.

Utilization of Red Mud Residues From Alumina Production.
PB196608

Publication Date	1970
Personal Author	Fursman, O. C.; Mauser, J. E.; Butler, M. O.; Stickney, W. A.
Page Count	36
Abstract	Research was undertaken to study methods of utilizing red mud residues from production of alumina from bauxite. Pilot-plant tests were conducted using Jamaican and Surinam red muds. Both the carbon-lime-soda sinter process and electric-arc smelting with coke and limestone were employed to recover iron and alumina. Alumina recoveries of 85 to 90 percent were obtained by the sinter process; although iron recovery was about 80 percent, the magnetic product was finely divided and difficult to separate from the gangue. Smelting red muds in the electric-arc furnace produced a pig iron with 98-percent recovery of iron; up to 84 percent of the Al2O3 was recovered by leaching the calcium aluminate slag with Na2CO3 solution. A titania product assaying 96 percent TiO2 was recovered from the nonmagnetic portion of Surinam red mud sinter by extraction with H2SO4. Leached calcium aluminate slags and brown mud (from the combination Bayer process) are possible raw materials in the manufacture of portland cement. (Author)
Keywords	Bayer process Tailings Materials recovery Smelting Aluminum oxides Titanium dioxide Iron oxides Sintering Mud Iron Grinding(Comminution) Sodium carbonates Pilot plants Phase diagrams Magnetic separators Electric arc furnaces Red mud
Source Agency	Invalid Source Agency Code
NTIS Subject Category	48A - Mineral Industries
Corporate Authors	BUREAU OF Mines, Washington, D.C.
Document Type	Technical Report
Title Note	Rept. of investigations.
NTIS Issue Number	197105