Copper Recovery from Roasted Chalcopyrite Concentrate by Using Hydrochloric Acid or Water Leaching Method

Abstract

In this study, the sulphation roasting in atmospheric medium of chalcopyrite concentrate and hydrochloric acid or water leaching of roasted chalcopyrite concentrate were investigated. The effects of roasting temperature (200-700 oC) and roasting time (15-120 min.) on recovery of copper were also researched. The optimum roasting temperature and roasting time were determined to be 450 oC and 60 min., respectively. The roasted chalcopyrite concentrate is leached with hydrochloric acid solution or water for recovery of copper. It was shown that the copper extractions from roasted chalcopyrite concentrate are high as 85-90%, while recoveries of iron were are only 6-20%. The leaching conditions with hydrochloric acid solution or water for roasted chalcopyrite concentrate were selected as follows: liquid/solid (v/w) ratio, 10 mL/g; leaching temperature, ambiance temperature; leaching time, 15 min; concentration of hydrochloric acid solution, 0.1 N. Under these conditions, for roasting at 450 oC, recoveries of copper and iron with hydrochloric acid leaching were 89.7% and 20.1%, respectively. On the other hand, copper and iron extraction yields with water leaching were 86.8% and 13.5%, respectively. For all conditions, it was determined that the amounts of copper obtained from hydrochloric acid leaching are higher than values obtained from water leaching

Keywords

• Chalcopyrite concentrate, Hydrochloric acid leaching, Roasting, Sulphation, Water leaching

Hidroklorik Asit veya Su Liçi Yöntemi Kullanarak Kavrulmuş Kalkopirit Konsantresinden Bakır Kazanılması

Abstract

Bu çalışmada, kalkopirit konsantresinin atmosferik ortamda sülfatlama kavurması ve kavrulmuş kalkopirit konsantresinin hidroklorik asit veya su liçi incelendi. Bakır kazanılması üzerine kavurma sıcaklığı (200-700 oC) ve kavurma zamanının (15-120 dk) etkileri de araştırıldı. En uygun kavurma sıcaklığı ve kavurma süresi, sırasıyla, 450 oC ve 60 dk olarak belirlendi. Kavrulmuş kalkopirit konsantresi, bakırın kazanılması için, hidroklorik asit çözeltisi veya su ile liç edildi. Kavrulmuş kalkopirit konsantresinden sadece % 6-20 demir kazanımı olurken % 85-90 gibi yüksek bakır ekstraksiyonu olduğu görüldü. Kavrulmuş kalkopirit konsantresi için hidroklorik asitçözeltisi ve su ile liç şartları, müteakip şekilde seçildi: sıvı/katı (v/w) oranı, 1 0 mL/g; liç sıcaklığı: ortam sıcaklığı; liç süresi: 15 dakika; hidroklorik asit derişimi: 0.1 N. Bu şartlar altında, 450 oC'deki kavurma için, hidroklorik asit liçi ile bakır ve demir kazanımları, sırasıyla, % 89.7 ve % 20.1'dir. Diğer taraftan, su liçi ile bakır ve demir ekstraksiyon miktarları, sırasıyla, % 86.8 ve % 13.5'tir. Tüm şartlar için, hidroklorik asit liçinden elde edilen bakır miktarlarının su liçinden elde edilen değerlerden daha yüksek olduğu belirlendi.

Keywords

• Hidroklorik asit liçi, Kalkopirit konsantresi, Kavurma, Sülfatlama, Su liçi

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