Includes bibliographical references.
|Statement||by Agnes Y. Lee, Ann M. Wethington, and Ernest R. Cole, Jr.|
|Series||Report of investigations ;, 9314, Report of investigations (United States. Bureau of Mines) ;, 9314|
|Contributions||Wethington, Ann M., Cole, E. R.|
|LC Classifications||TN23 .U43 no. 9314, TN785 .U43 no. 9314|
|The Physical Object|
|Pagination||7 p. :|
|LC Control Number||90001919|
A procedure is described for recovering both lead and sulfur from galena flotation concentrate, comprising the following steps: (1) aqueous oxidation of the concentrate, using ferric sulfate to convert lead sulfide to sulfate and to give elemental sulfur; (2) regeneration of the ferric sulfate by electrolysis in a diaphragm cell; (3) treatment of the leach residue with ammonium carbonate. Hydrometallurgical process for producing lead and elemental sulfur from galena concentrates. Published Date: (hts) and chloride leaching procedure to recover lead and silver from plumbojarosite. "As part of the U.S. Bureau of Mines program to improve base metal leach systems, pressure leaching of galena (pbs) concentrates in Cited by: The hydrometallurgical recovery of metal values from sulfide concentrates, such as chalcopyrite, enargite, and sphalerite, typically generates elemental sulfur in the oxidative leaching processes. In this pape will be shown possibilities to produce lead metal and elemental sulfur by leaching domestic galena concentrates. In our invesigations we treated lead concentrate from the Zletovo mine which contains around 70% Pb and lead-zinc concentrate fromthe Sasa mine which contents around 35%Pb.
The method consists of (1) oxidative leaching with H2O2, PbO2, and waste fluosilicic acid at 95 degree C to produce a solution of PbSiF6 and a residue containing elemental S, (2) electrowinning the PbSiF6 solution at 35 degree C to produce pct Pb metal and H2SiF6, and (3) solvent extraction to recover S, leaving a residue containing Cu. in even more stringent controls on emission of sulfur gases. Processing of the galena concentrates is developed as an effctive low-temperature leaching-electrowining method to produce Pb metal and elemental sulfur from galena concentrates. The method reduces Pb emissions and totally eliminates the formation of sulfur : Blagoj Golomeov, Boris Krstev, Mirjana Golomeova, Aleksandar Krstev. lead metal and elemental sulfur from simulated galena synthetic mixures eliminating sulfur gases and lead emissions, in contrast to the current high-temperature smelting technology. The method consists of different operations: oxidative leaching with production of solution with. Then, the elemental sulfur can be recovered by cooling the sulfur-containing organic phases; (b) sodium sulfide leaching and carbon dioxide precipitation to recover elemental sulfur from zinc concentrate DLR. Elemental sulfur with a purity of % can be recovered; (c) Solid sorbents to recover S during the leaching by: 8.
Analysis of the content of elemental sulfur in the leaching residues indicated that the fraction of sulfide sulfur determined as elemental sulfur was about 10% at K, and that it decreased with. Processes employing direct oxidation under an over-pressure of air or oxygen in an aqueous sulphuric acid medium have been developed in the Sherritt Gordon Laboratories for iron, nickel, cobalt, zinc and lead sulphide concentrates. This study has recently also been extended to chalcocite, Cu2S, concentrates. The rising interest in processes employing direct aqueous oxidation is stimulated Cited by: A process for the recovery of copper, molybdenum, gold and elemental sulfur in tailings from hydrometallurgical processing of copper sulfide ores, the process comprising concentrating the tailings containing elemental sulfur and copper, gold and molybdenum to a small bulk volume by froth flotation to reject barren gangue including jarosite, if present, and other impurities, separating the Cited by: 5. Recovery of Gold from Lead Concentrates. The association of silver with lead minerals, in particular galena [PbS], is well known and documented, but gold is also frequently found in lead concentrates, and its recovery follows closely that of silver. Smelting Processes. Galena concentrates are usually smelted to produce lead by: 4.