The mixed ore
circuit experienced a 14% increase in throughput when the SAG volumetric filling degree changed from 21.
This complex deposit, comprising oxide, sulphide and mixed ore
bodies, is situated some 5,000 m above sea level and straddles the border between Chile and Argentina.
Langbeinite is mined from our East Mine, and is a mixed ore
body containing both potash and langbeinite.
Arvada, Colorado) on each of the oxide, sulfide and mixed ore
zones to determine metallurgical recovery rates and amenability of the mineralized zones to heap-leaching with SX/EW recovery of copper, and conventional mining, milling, flotation and concentration.
In the mixed ore
atmospheric leach circuit, copper leach extraction could be improved by up to 30% depending on the proportion of transition sulphide minerals in the mixed ores
through the provision of heated acid and ferric sulphate ions from the autoclave effluent.
The initial mining operation will focus on extracting and processing, by heap leach, the oxide and mixed ore
Composite Type Recovery Au(i) Recovery Ag(i) Oxide ore 78% 45% Mixed ore
70% 50% Sulfide ore 59% 59% (i) presumed 100% passing -3/8 inch crush
0 million tonnes per year of oxide and mixed ore
The plant last operated between May and October 1998 and processed high grade mixed ore
This improvement is primarily a result of the drilling program executed since early 1998, the updated geological interpretation derived from this additional information, the reassaying of the silver sampling information and the addition of mixed ore
based on metallurgical testing.
TABLE 1 Mina Ivan and Sierra Valenzuela Reserves Oxide Ore Sulphide Ore Mixed Ore
Waste Area Tonnes Grade Tonnes Grade Tonnes Grade Tonnes (%) (%) (%) Ivan Underground 1,341,514 2.
Such mixed ores
were therefore abandoned (perhaps the first known case in which worker safety was a factor in technology).