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Solubility of lead and distribution of minor elements between bullion and calcium ferrite slag at 1,250C.

Authors
Fisher-GT II; Bennington-KO
Source
Albany, OR: U.S. Department of the Interior, Bureau of Mines, RI 9369, 1991 Jan; :1-9
Link
NIOSHTIC No.
10009162
Abstract
The U.S. Bureau of Mines conducted research on calcium ferrite slags to determine the distribution of Pb and monor elements (Ag, Cd, Zn, and Co) between Pb bullion and slag. The fundamental data are required to evaluate nonferrous smelting with calcium ferrite slags as a substitute for conventional iron silicate slags. Determinations were made in 25-cu cm capacity MgO crucibles at 1,250 C for 2 h in a CO-CO2 atmosphere with an O2 potential that would retard the formation of magnetite. Calcium ferrite slag composition variables studied were from 16 to 32 wt pct CaO in 2-pct increments and SiO2 ranging from 1 to 5 wt pct in 1-pct increments with equal additions of MgO. For all compositions studied, the retention of Pb in the calcium ferrite slag was less than 1 wt pct, which compares favorably to about 6 wt pct Pb in conventional iron silicate slags used in smelting of Pb concentrates. Minor element distribution was insensitive to changes in slag composition in the range studies. However, slag composition had significant impact on the melting and fluidity of the slag.
Keywords
Chemical-composition; Retention; Silver; Cadmium; Oxygen; Absorption-spectra; Thermodynamics; Metal-industry; Cobalt; Zinc; Experimental-design; Chemical-analysis; Lead-Metal; Solubility; Smelting; Slags; Extractive-metallurgy
Publication Date
19910101
Document Type
IH; Report of Investigations
Fiscal Year
1991
NTIS Accession No.
PB91-231670
NTIS Price
A03
Identifying No.
RI-9369
NIOSH Division
ALRC
Source Name
Albany, OR: U.S. Department of the Interior, Bureau of Mines, RI 9369
State
OR
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