Tham khảo tài liệu 'extractive metallurgy of copper 4th ed. w. davenport et. al. (2002) episode 9', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Hydrometalhirgical Copper Extraction 297 solvent extraction and electrowinning plants are given in Chapters 18 and 19. Zaldivar heap leach Hellenic Copper Morenci mine for leach 1995 1996 1987 145 000 8000 366 000 14 5 1 chalcocite bronchantite chalcocite chalcocite chrysocolla chrysocolla 1 in covellite chalcocite disseminated. principally fracture filling others on fracture surfaces 75 78 of leachable 53 of leachable on off permanent conveyor Slacking excavator stacking conveyor stacking 1200 250 2137 90 30 144 8 6 7-9 8 42 yes no yes 10 m3 air minute m2 HDPE HDPE mm HDPE over clay yes yes both belt curing 80 12 mm 50 75 mm 12 mm crushed 300 mm ROM yes no yes for about 30 of material belt curing in rotating drum concentrated 200 kg m3 H2SO4 onto heap for 3 days 8 no H2SO4-fortified H2SO4-fortified raffinate raffinate raffinate 8 4 12 mine for leach other 4-5 22 32 emitters emitters both principally emitters belt acid cure leach with 18 months mine for leach crushed material fines are raffinate for 30 days agglomerated with strong acid in a then leach with recycling rotating drum then stacked in 7 m lifts pregnant solution for 270 leached for 90 days rested for 30 days days then leached again for 30 days 1 3 23 32 on-pad piping ditches pipes ponds clay HDPE -lined ponds 4800 520 19 051 298 Extractive Metallurgy of Copper Table . Details of heap leach aeration system at Quebrada Blanca Salomon-de-Friedberg 1998 1999 2000 . Salomon-dc-Friedberg 1998 gives detailed numerical calculations. The air header pipe is placed on the uphill side of the heap base. Quebrada Blanca has 20 of these heaps. Item Description Individual heap module 85 m X 400 m horizontal dimensions 34 000 m2 . Consists of 7 m lifts eventually piled to a total of 60 m high. Air supply rate 170 m3 minute m3 min m2 of top surface . The design assumes 20 utilization ofO2 entering heap Air header .
