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Flotation is universally used to concentrate minerals from low-grade ores into smaller mass. For sulfide base-metal ores, such as the lead-zinc sulfide or copper-zinc sulfide ores, xanthates are used as flotation collectors. In such ores, lead (or copper) minerals are floated first and zinc minerals are .
Where the oxide lead minerals are present in appreciable amounts, it is the usual practice to float the lead sulfides first. Then, if present, the zinc sulfide is floated, followed by flotation of the lead minerals. Either sodium sulfide or sodium hydrosulfide is used as a sulfidizing agent.
[Show full abstract] depression and cleaning of mineral surfaces by sodium sulfide for selective copper-zinc flotation. The ores have high recoverable values; 70 and 95 /t, for the 13 degree N and ...
Sodium Sulfide. Oxidized minerals of lead, zinc, and copper, such as cerussite, smithsonite, azurite, and malachite, float poorly with sulfhydryl collectors due to a combination of collector loss through precipitation by heavy metal ions dissolved from the mineral lattice, and collector coatings that are weakly anchored and readily removed by ...
Abstract. This paper reviews uses of sodium sulfide in the flotation of oxide minerals of copper, lead, and zinc. The activation and depression effects of sodium sulfide are of particular importance because of their applications with oxidized lead and copper ores.
The flotation of lead mineral from a low grade lead–zinc sulfide ore has been investigated using a laboratory scale mechanical flotation cell. The effect of various operating parameters including type and concentration of collectors, pulp pH, grinding time, solid-in-pulp concentration on the flotation behavior of lead mineral have been studied.
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of sphalerite as composite particles during lead flotation, and (c) the pulp pH was best maintained at natural pH during pre-flotation and at an elevated alkaline pH (pH 9.5) during lead flotation for optimal selectivity. In terms of depressants it was found that zinc sulfate specifically depressed sphalerite during lead flotation.
Flotation of Aladag oxide lead-zinc ores. ... The sulfidizing agents such as sodium sulfide are normally decanted to condition cerussite ... the recoveries of zinc and lead in flotation ...
For example, in the flotation of lead-zinc sulfide ore, it is necessary to separate lead, zinc and sulfur. At this time, flotation reagents are used to change the nature of one of the minerals and separate them one by one. In the case of lead-zinc separation, the "zinc-inhibited and lead-collected" program is .
Sodium silicate is employed as a deflocculator of gangue slime in cases where the latter is too floatable to be kept out of the concentrate by any other means. Its application is confined mainly to the flotation of lead and zinc ores and tailings.
Various process chemicals are used in the froth-flotation of metallic ore of uranium, copper, zinc, lead, and iron. The flotation chemicals are mainly Isooctyl Acid Phosphate, Sodium Isopropyl Xanthate and Potassium Amyl Xanthate as conditioner and collector, MIBC as frothers, and sodium cyanide and copper sulfate as depressors.
Lead is recovered from lead sulfide concentrates or mixed lead-zinc concentrates containing iron sulfide by forming a slurry of such concentrates in an aqueous medium containing ammonium sulfate and free ammonia, and introducing such slurry into a closed reaction vessel at a pressure not exceeding 30 psig. Oxygen also is introduced into such vessel to establish therein a partial oxygen ...
Lead/Zinc Separation Process and Circuit Flowsheet. Extensive batch and pilot plant testing and actual plant operating experience has established the above flowsheet as typical for the average zinc sulfide ore containing galena and usually pyrite in a lime or siliceous gangue.
In the flotation of oxidized zinc using sodium sulfide, and flotation with a cationic collector, using Armac C or dodecylamine, produced best results. Using an amine emulsion with elevated additions of fuel oil and pine oil emulsion could be beneficial. It is proper .
The main usful elements in a flotation tailings in Inner Mongolia were lead, zinc and silver, and the main lead and zinc minerals were oxide minerals. The content of sulfide minerals of lead and zinc especially sulfide mineral of lead were small,so It was difficult to get concentrate of sulfide mineral of lead.The flotation tailings was used as the
May 18, 2018· In this paper, formation of zinc sulfide species during roasting of ZnO with FeS2 was investigated and its contribution on flotation was illustrated. The evolution process, phase and crystal ...
Flotation experiment research on a polymetallic sulfide ore of Cu, Pb, and Zn in Shanxi province ... flotation – copper/lead separation - priority flotation zinc and pyrite from the bulk flotation tailings was used. The ... 1000g/t of Zinc sulfate, 500 g/t of sodium sulfate, 40 g/t of Z-200, 40 g/t of ...
Sodium sulfide is the chemical compound with the formula Na 2 S, or more commonly its hydrate Na 2 S·9H 2 O.Both are colorless water-soluble salts that give strongly alkaline solutions. When exposed to moist air, Na 2 S and its hydrates emit hydrogen sulfide, which smells like rotten eggs.Some commercial samples are specified as Na 2 S·xH 2 O, where a weight percentage of Na 2 S is specified.
Froth flotation is a process for selectively separating hydrophobic materials from hydrophilic.This is used in mineral processing, paper recycling and waste-water treatment industries. Historically this was first used in the mining industry, where it was one of the great enabling technologies of the 20th century.
&ER& United States Environmental Protection Agency Industrial Environmental Research Laboratory Cincinnati OH 45268 Research and Development EPA-600/S2-81-157 Oct. 1981 Project Summary Alternatives for Sodium Cyanide for Flotation Control E. J. Mezey, D. W. Neuendorf, G. Ray Smithson, Jr., and James F. Shea Cyanide has long been looked upon as the classical poison and has been .
Wan Hong-min 10 pairs ShaanxiXinRiver lead and zinc in the ore concentrator stockpiled for use of sodium sulfide removal drug pretreatment process and then to get the lead flotation of lead concentrate and zinc 63,123 55,189 lead and zinc concentrates zinc recoveries were up to 60,156 and 85,155 full advantage of the secondary mineral resources.
The most common zinc ore is sphalerite (zinc blende), a zinc sulfide mineral. The largest workable lodes are in Australia, Asia, and the United States. Zinc is refined by froth flotation of the ore, roasting, and final extraction using electricity (electrowinning).
1 Froth Flotation – Fundamental Principles Froth flotation is a highly versatile method for physically separating particles based on differences in the ability of air bubbles to selectively adhere to specific mineral surfaces in a mineral/water slurry. The particles with attached air .
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