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Murgul sülfürlü bakır cevherlerinden ferrik klorür liçi ile Cu,Pb,Zn,Bi,Te kazanımı

Başlık çevirisi mevcut değil.

  1. Tez No: 55600
  2. Yazar: AHMET UZUNOĞLU
  3. Danışmanlar: DOÇ.DR. FATMA ARSLAN
  4. Tez Türü: Yüksek Lisans
  5. Konular: Maden Mühendisliği ve Madencilik, Mining Engineering and Mining
  6. Anahtar Kelimeler: Belirtilmemiş.
  7. Yıl: 1996
  8. Dil: Türkçe
  9. Üniversite: İstanbul Teknik Üniversitesi
  10. Enstitü: Fen Bilimleri Enstitüsü
  11. Ana Bilim Dalı: Belirtilmemiş.
  12. Bilim Dalı: Belirtilmemiş.
  13. Sayfa Sayısı: 56

Özet

ÖZET Bu tez çalışmasında, Murgul Damar Bölgesi kompleks sülfîirlü cevherlerinde, ana metallerle beraber nadir ve değerli metallerin dağılımları belirlenmiş ve kazanılma olanakları araştırılmıştır. Murgul Damar Bölgesinden zengin cevher zonlarından seçilerek alınan cevher numunesi %14.4 Cu, %2.84 Zn, %25.51 Fe, %0.18 Pb, 417 g/t Bi, 118 g/t Te,

Özet (Çeviri)

RECOVERY OF Cu, Pb, Zn, Bi, Te FROM MURGUL SULPHIDIC COPPER ORES BY FERRIC CHLORIDE LEACHING SUMMARY Rare metals are used in material production industry as alloying elements in order to increase strength and resistance of alloys against heat, corrosion and acids. They are also used in electrical industry due their high conductivity. Demands for special fields of use (high technology materials) substantialy increased the above mentioned metals. it is well known that rare metals exist in sulphidic ores, concentrates, flue dusts and tailings. There are not much of investigations done in Türkiye in terms of contents and distributions of rare metals in these types of ores, concentrates and tailings. Earlier studies showed the presence of rare metals (Te, Se, Bi, in, Ge, Re) in Murgul ores and concentrates. Since the production of rare metals is carried out as small quantities, their price increase sharply. Therefore, in Türkiye, the production possibilities of rare metals, exist in ores, concentrates and tailings, as by products in majör metal production lines, should be throughly investigated. Experimental work covers sampling, determination of their physical and chemical properties, metal distributions, flotation and ferric chloride leaching studies. The aim of this experimental study is to determine the distribution of base metals along with rare and precious metals in Murgul - Damar region sulphidic copper ores and to investigate their beneficiation possibilities. Xin this research, selective öre samples collected from rich zones of Murgul - Damar region were used. Öre sample contained 14.4% Cu, 2.84% Zn, 0.18% Pb, 25.51% Fe, 417 g/t Bi, 118 g/t Te, 4 as an activator for sphalerite were the reagents used in the flotation tests. Bulk flotation experiments were performed at the natura! pH with Aerophine 3418A and Dovvfroth 250. Selective Flotation tests prior to Bulk flotation were carried out at the pH of 11.5 stabilized with the addition of CaO (lime) without the use of collector and frother. in the first group of these flotation experiments for determining metal distributions, chalcopyrite, pyrite and sphalerite-galena concentrates were produced separately. Chemical analysis of flotation products revealed the presence of 29.88% Cu in the chalcopyrite and 38.41% Zn, 1.96% Pb, 2800 g/t Bi, 1700 g/t Te in the sphalerite- galena concentrate. After determining the distributions of metals in the flotation products, the optimum conditions of flotation for concentration purpose were found. A chalcopyrite concentrate containing 24.19% Cu content with 94.4% recovery and a complex sulfidic xi(chalcopyrite - sphalerite - galena - pyrite) concentrate containing 6.13% Zn, 0.41% Pb, 4.3% Cu, 22.86% Fe, 1250 g/t Bi and 250 g/t Te were produced and a tailing containing 0.23% Cu was removed as a result of flotation experiments run at optimum conditions. Ferric chloride leaching experiments were carried out with the complex sulfîdic flotation concentrate in order to recover Cu, Zn, Pb, Bi and Te. in the leaching experiments, the effects of ferric ion and HC1 concentrations, temperature, solid/liquid ratio and leaching time on the metal leaching recoveries were investigated. Metal leaching recoveries increased with increasing leaching time. Pb and Bi dissolutions were faster than the others and recoveries of Pb and Bi increased rapidly in öre öne hour of leaching to the values of 92.2% Pb and 80.7% Bi, respectively and levelled off after that. Cu and Zn dissolution curves versus time showed similar behaviour. 74.1% of Cu and 82% of Zn were leached at the end of 8 hour leaching period. Changing ferric ion concentration showed almost no effect on the leaching recoveries of Pb, Cu, Bi, Fe but Zn recovery started to decrease sharply after 75 g/1 Fe^+ concentration. Optimum Fe^+ ion cocentration was found 75 g/1. Leaching recoveries of Pb, Zn, Bi, Fe were not affected by increasing HC1 concentration while Cu recoveries declined. 20 g/1 HC1 concentration was found as an optimum value. Leaching recoveries of ali metals (except Zn) did not change very much with the increasing solid/liquid ratio. Optimum solid/liquid ratio was about 1/10. increasing temperature had increasing effect on leaching recoveries of ali metals. 90 °C of leaching temperature resulted in the highest metal leaching recoveries. Therefore, 90 °C could be chosen as an optimum leaching temperature. During the leaching tests, pyrite showed a little dissolution ( about 10% ) and most of the iron in the solution comes from the dissolved calcopyrite. XİİWeigt losses during the leaching tests showed similar changes in relation to the metal dissolution efficiencies. Increasing leaching time had an increasing effect on the weight loss changes. Solid-liquid ratio, Fe^+and HC1 concentration changes did not affect the weight loss much. Increasing the temperature increased the weight loss a little. As a result of investigating leaching parameters, optimum leaching conditions were found as : The following metal leching recoveries were observed in the experiments run at optimum leaching conditions : As a conlusion of this experimental study, the distributions of base metals together with rare and precious metals and the possibilities of their recoveries (Cu, Zn, Pb, Fe, Bi, Te) with ferric chloride leaching were shown. These findings, would be applied to the similar type of ores from other regions in Türkiye and more researches should be conducted on the benefication of polimetallic ores. xinMetals disolved during the ferric chloride leaching could be recovered from leachates by the applications of cementation, solvent extraction, ion exchange and electrolysis processes. As a continuation of this study, investigations on these processes are recommended. XIV

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