Response of low-grade gold ore to cyanidation and thiourea leaching
| Autor: | Sied Ziaedin Shafaei Tonkaboni, Mohammad Noparast, Hamed Valizadeh Haghi, Yaser Olyaei, Ahmad Amini |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
inorganic chemicals
Gold cyanidation General Chemical Engineering Cyanide Inorganic chemistry Sulfuric acid 02 engineering and technology 021001 nanoscience & nanotechnology chemistry.chemical_compound Carbon in pulp 020401 chemical engineering Thiourea chemistry Reagent medicine Ferric Leaching (metallurgy) 0204 chemical engineering 0210 nano-technology medicine.drug |
| Zdroj: | Particulate Science and Technology. 37:86-93 |
| ISSN: | 1548-0046 0272-6351 |
| DOI: | 10.1080/02726351.2017.1343881 |
| Popis: | In this study, leaching tests were conducted on representative samples provided from Hamze-Qarnein gold deposit with grade of 0.8 ppm using cyanidation and thiourea leaching. Effective parameters including particle size, reagent concentration, oxidant concentration, pH, and dissolution time were examined in both cyanidation and acidic extraction with thiourea. Gold recovery and reagent consumptions (lime, cyanide, thiourea, ferric sulfate, and sulfuric acid) were measured under different leaching conditions. The results showed that cyanidation method was efficient with 95.21% gold recovery with following conditions: d80 = 63 µm, pH 10.5, cyanide consumption of 1.23 kg/t, and 12 h cyanidation time. The acidic leaching using thiourea, required more chemical reagents and maximum gold recovery of 90.48% was achieved with thiourea consumption, leaching time, and pH equal to 13.32 kg/t, 5 h, and 1.7, respectively. According to the results, there was an interaction between ferric sulfate and thiourea con... |
| Databáze: | OpenAIRE |
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