scholarly journals Leaching of Primary Copper Sulfide Ore in Chloride-Ferrous Media

Minerals ◽  
2018 ◽  
Vol 8 (8) ◽  
pp. 312 ◽  
Author(s):  
Karina Salinas ◽  
Osvaldo Herreros ◽  
Cynthia Torres
Keyword(s):  
Copper Sulfide ◽  
Porphyry Copper ◽  
Copper Deposit ◽  
Porphyry Copper Deposit ◽  
Copper Extraction ◽  
Leaching Tests ◽  
Chemical Leaching ◽  
Sulfide Ore ◽  
Two Temperatures ◽  
Copper Sulfide Ore

Copper extraction from primary copper sulfide ore from a typical porphyry copper deposit from Antofagasta, Chile, was investigated after leaching with a chloride-ferrous media at two temperatures. The study focused on whether this chemical leaching system could be applied at an industrial scale. Leaching tests were conducted in columns loaded with approximately 50 kg of agglomerated ore; the ore was first cured for 14 days and then leached for 90 days. The highest copper extraction, 50.23%, was achieved at 32.9 °C with the addition of 0.6 kg of H2SO4 per ton of ore, 0.525 kg of NaCl per ton of ore, and 0.5 kg of FeSO4 per ton of ore. In respect to copper extraction, the most effective variables were temperature and the addition of NaCl.

scholarly journals BIOLEACHING OF COPPER FROM CARAIBA MINE ORE (BRAZIL)

2019 ◽  
Vol 49 (1) ◽  
pp. 25-29
Author(s):  
L. A. BERNARDEZ ◽  
L.R. P. DE ANDRADE LIMA ◽  
L.E. L. DE OLIVEIRA
Keyword(s):  
Low Temperature ◽  
Mine Tailings ◽  
Copper Sulfide ◽  
Gold Mine ◽  
Copper Ore ◽  
Chemical Leaching ◽  
Sulfide Ore ◽  
Gold Mine Tailings ◽  
Acid Mining Drainage ◽  
Copper Sulfide Ore

The bioleaching of copper ore from the Caraiba Mine was assessed. A microorganism, Acidiothiobacillus ferrooxidans, was isolated from samples collected directly in acid mining drainage in a gold mine tailings pound and used in the bioleaching of the copper sulfide ore. This ore is composed mainly of 28% of oxidized species, 43% of secondary sulfides and 24% of primary sulfide. The shaking flasks experiments with the Caraiba ore showed copper chemical leaching of about 37% and copper bioleaching of about 60% within 60 days at low temperature and native microorganism.

scholarly journals Accelerating Copper Leaching from Sulfide Ores in Acid-Nitrate-Chloride Media Using Agglomeration and Curing as Pretreatment

Minerals ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 250 ◽  
Author(s):  
Pía C. Hernández ◽  
Junior Dupont ◽  
Osvaldo O. Herreros ◽  
Yecid P. Jimenez ◽  
Cynthia M. Torres
Keyword(s):  
Copper Sulfide ◽  
Chloride Concentration ◽  
Copper Extraction ◽  
Copper Dissolution ◽  
Three Samples ◽  
Copper Leaching ◽  
Sulfide Ore ◽  
Higher Temperature ◽  
Pretreatment Conditions ◽  
Copper Sulfide Ore

This work investigates the effect of an agglomeration and curing pretreatment on leaching of a copper sulfide ore, mainly chalcopyrite, using mini-columns in acid-nitrate-chloride media. Ten pretreatment tests were conducted to evaluate different variables, namely the addition of nitrate as NaNO3 (11.7 and 23.3 kg/ton), chloride as NaCl (2.1 and 19.8 kg/ton), curing time (20 and 30 days) and repose temperature (25 and 45 °C). The optimum copper extraction of 58.6% was achieved with the addition of 23.3 kg of NaNO3/ton, 19.8 kg of NaCl/ton, and after 30 days of curing at 45 °C. Under these pretreatment conditions, three samples of ore were leached in mini-columns. The studied parameters were temperature (25 and 45 °C) and chloride concentration (20 and 40 g/L). The optimum copper extraction of 63.9% was obtained in the mini-column leaching test at 25 °C, with the use of 20 g/L of chloride. A higher temperature (45 °C) and a higher chloride concentration (40 g/L) negatively affected the extraction. The pretreatment stage had favorable effects, in terms of accelerating copper dissolution and improving leaching of copper sulfide ore in acid-nitrate-chloride media. Waste salts from caliche industry and waste brine from reverse osmosis can be used for providing the nitrate and chloride media.

Experimental Study of Floatation on Non-Independent Copper Oxide Ore from Jilin Province in China

2012 ◽  
Vol 581-582 ◽  
pp. 851-855
Author(s):  
Rong Dong Deng ◽  
Quan Jun Liu ◽  
Xiao Feng Yang ◽  
Ting Hu ◽  
Feng Hong Ye
Keyword(s):  
Copper Oxide ◽  
Copper Sulfide ◽  
Jilin Province ◽  
High Grade ◽  
High Recovery ◽  
Copper Ore ◽  
Sulfide Ore ◽  
Mineralogical Study ◽  
Oxide Minerals ◽  
Copper Sulfide Ore

Through the processing of mineralogical study on a copper ore from Jilin province in China, it found that the copper exist mostly with the form of chalcopyrite, and others exist with the form of copper oxide minerals which with complex ingredient. The copper oxide minerals are due to the altered of the edge of chalcopyrite, and have not formed the independent copper oxide ore. It belongs to unconventional hard-to-beneficiate copper ore. Coarse grinding fineness and bulk floatation was used to recover the copper oxide ore and copper sulfide ore by using amino double phosphoric acid and butylamine dithiophosphate as the collector. This process was similar to the carrier flotation and achieved an effective processing of the copper oxide ore and obtained a high-grade copper concentrate assaying 15.8% with a high recovery of 82.4%.

Sign in / Sign up

Export Citation Format

Share Document