مورد إلكتروني
Evaluation of sulphidic tailings recycling processes and the economic interest of biological re-oxidation.
| العنوان: | Evaluation of sulphidic tailings recycling processes and the economic interest of biological re-oxidation. |
|---|---|
| المؤلفون: | Sasseville J.L., 24th CIM annual hydrometallurgical meeting Toronto 21-Aug-9424-Aug-94, Blais J.F., Hammou N., Lebcir R., Villeneuve J.P. |
| بيانات النشر: | Montreal Canadian Institute of Mining, Metallurgy and Petroleum 1994 |
| نوع الوثيقة: | Electronic Resource |
| مستخلص: | Although many techniques for controlling acid mine drainage have been developed and tested, relatively little work has been done on the retreatment of sulphidic wastes for the recovery of their metals content. An industrial pilot study of tailings recycling is being carried out at Manitou-Barvue in Quebec, whose mill treated 14 000 000 tonnes of ore from 1942 to 1989. The tailings are of four kinds: 7 500 000 t from massive pyrite and sphalerite with accessory galena, tennantite and tetrahedrite, 3 600 000 t from zones rich in pyrite and chalcopyrite, 960 000 t from copper ore and 640 000 t fom copper-silver ore. The pH varies fom 4.8 to 6.4 and mean grades are 0.33 ppm Au, 15.4 ppm Ag and 0.07% Cu, with 0.2-1.2% Zn, 8.8% Fe and 7.4% S. The recycling process comprises the following stages: washing for desulphatisation and dissolution of zinc salts, separation of sulphide and oxide phases by flotation, sizing and comminution of the sulphide phase, recovery of gold and silver by cyanidation, selective flotation for sphalerite concentration and zinc extraction, and residue cyanidation, flotation and disposal. Cost-benefit analysis by means of a computer program has confirmed the economic benefits of the technology and the additional advantages of incorporating different biotechnological processes in the pre-oxidation stage for further enhancement of recovery efficiency. Although many techniques for controlling acid mine drainage have been developed and tested, relatively little work has been done on the retreatment of sulphidic wastes for the recovery of their metals content. An industrial pilot study of tailings recycling is being carried out at Manitou-Barvue in Quebec, whose mill treated 14 000 000 tonnes of ore from 1942 to 1989. The tailings are of four kinds: 7 500 000 t from massive pyrite and sphalerite with accessory galena, tennantite and tetrahedrite, 3 600 000 t from zones rich in pyrite and chalcopyrite, 960 000 t from copper ore and 640 000 t fom copper-silver ore. The pH varies fom 4.8 to 6.4 and mean grades are 0.33 ppm Au, 15.4 ppm Ag and 0.07% Cu, with 0.2-1.2% Zn, 8.8% Fe and 7.4% S. The recycling process comprises the following stages: washing for desulphatisation and dissolution of zinc salts, separation of sulphide and oxide phases by flotation, sizing and comminution of the sulphide phase, recovery of gold and silver by cyanidation, selective flotation for sphalerite concentration and zinc extraction, and residue cyanidation, flotation and disposal. Cost-benefit analysis by means of a computer program has confirmed the economic benefits of the technology and the additional advantages of incorporating different biotechnological processes in the pre-oxidation stage for further enhancement of recovery efficiency. |
| مصطلحات الفهرس: | ACID MINE DRAINAGE, BIOOXIDATION, CANADA, CHALCOPYRITE, COMMINUTION, COPPER, COPPER-SILVER, COST-BENEFIT ANALYSIS, CYANIDATION, FLOTATION, GALENA, GOLD, MANITOU-BARVUE, METALLURGY, PH, PILOT STUDY, PYRITE, QUEBEC, SELECTIVE FLOTATION, SILVER, SIZING, SPHALERITE, SULPHIDE ORES, TAILINGS, TENNANTITE, TETRAHEDRITE, WASHING, WASTE RECOVERY, WASTES, ZINC, text |
| URL: | Harris B.; Krause E.; (eds)Impurity control and disposal in hydrometallurgical processes, proceedings of the %C%. |
| الإتاحة: | Open access content. Open access content |
| ملاحظة: | und |
| أرقام أخرى: | UKMMM oai:icon.iom3.org:82884 1309215447 |
| المصدر المساهم: | INSTITUTE OF MATS MINERALS & MINING From OAIster®, provided by the OCLC Cooperative. |
| رقم الأكسشن: | edsoai.on1309215447 |
| قاعدة البيانات: | OAIster |
| الوصف غير متاح. |