Skip directly to search Skip directly to A to Z list Skip directly to page options Skip directly to site content

NIOSHTIC-2 Publications Search

Search Results

Recycling of waste magnesite-chrome refractories from copper smelting furnaces.

Authors
Petty-AV Jr.; Martin-E
Source
Tuscaloosa, AL: U.S. Department of the Interior, Bureau of Mines, RI 8589, 1981 MMM; :1-18
Link
NIOSHTIC No.
10006755
Abstract
In accordance with its objective to maximize minerals recovery from secondary domestic resources, the Bureau of Mines conducted research on recycling chrome refractory wastes. Since 20 pct of the U.S. Demand for imported chromite is used in the production of refractories, primarily for the steel, copper, and glass industries, samples of used chrome-containing refractories from copper converter and reverberatory furnaces were investigated to determine their potential for recycling. The samples were beneficiated using a combination of wet magnetic separation, flotation, and leaching techniques, and the concentrates were reformed into briquets for refractory evaluation. Small refractory test specimens produced from the beneficiated concentrates gave modulus of rupture values at 1,350 deg. C comparable to those of commercial mag-chrome brick of similar composition; however, grinding the waste refractories to at least minus 65-mesh was required in order to liberate the metallic copper. Most of the copper was easily recovered using conventional beneficiation techniques, but the finely ground chrome concentrate would require briquetting, calcining, and crushing to produce a coarse grain suitable for recycling into secondary mag-chrome refractories.
Publication Date
19810101
Document Type
IH; Report of Investigations
Fiscal Year
1981
NTIS Accession No.
NTIS Price
Identifying No.
RI-8589
NIOSH Division
TURC
Source Name
Tuscaloosa, AL: U.S. Department of the Interior, Bureau of Mines, RI 8589
State
AL
TOP