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Sodium hydrosulphide in the flotation of gold

  • Flotation using NaHS Sodium Hydrosulfide Froth FlotationFlotation using NaHS Sodium Hydrosulfide (1 reply) I work in the gold mine mill were we extract gold and silver from both oxide, sulphate and transitio

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global sodium hydrosulphide market size by product, byglobal sodium hydrosulphide market definition. sodium hydrosulphide (nahs) is an inorganic gas is produced by deprivation of organic constituents. it is extracted from anaerobic sediments. it is a yellow solid with smells similar to h5s and has the chemical formula nahs.applications for biogenic sulphide reagent forof gcopper ores and in the separation by flotation of copper and molybdenum. in all cases, biogenic sulphide reagent can be used to replace chemical reagents such as sodium hydrosulphide. biogenic sulphide, produced on demand at site, results in a superior metal sulphide product and offers significant cost savings and provides the additionalchemical use in g mining how to buy g recoveryfeb 24, · the flotation process is a widely used hydrometallurgical method to separate g from g containing ores. flotation reagents are chemicals that help in the attachment of air bubbles to the minerals and bringing them up at the surface.copper oxide flotationminingpediajul 27, · froth flotation is a method of separating ores using the difference in physical and chemical properties of mineral surfaces. it is currently the main method for the flotation of copper oxide. relatively speaking, froth flotation can be used to separate malachite and azurite. however, chrysocolla and copper phosphate are difficult to float.us5855770a base metal mineral flotation processesus5855770a us08/562,581 us562585a us5855770a us 5855770 a us5855770 a us 5855770a us 562585 a us562585 a us 562585a us 5855770 a us5855770 a us 5855770a authority us united states prior art keywords mineral sulphide base metal pulp flotation prior art date 9415 legal status (the legal status is an assumption and is not a legal conclusion.the effect of sodium hydrosulfide on molybdenite flotationmar , · the ph was adjusted by the addition of 1 m naoh solution instead of lime commonly used in flotation plants to eliminate the effect of ca 2+ on the flotation. sodium hydrosulfide (nahs) was added as a depressant in the flotation. both naoh and nahs were of ar grade. di water was used in preparation of all the reagents, grinding and flotation tests.cited by 9effect of grinding media and nahs on copper recovery atnov 01, 2· the flotation behaviour of copper minerals in the northparkes mines copperg ore is dependent on grinding media (and hence grinding eh) and aeration during conditioning. laboratory grinding and flotation tests were conducted using mild steel and stainless steel rods with and without the addition of sodium hydrosulphide (nahs) in the conditioning stage.cited by

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Advantages of sodium hydrosulphide in the flotation of g

development and optimization of mixed sulphide/oxidesulphidising flotation of oxide coppercobalt ores with sodium hydrosulphide used as sulphidising agent is common practice in katanga, democratic republic of congo.from laboratory investigations salt and sodium miscellaneous compoundssodium hydrosulfide finds use in ore flotation, dyestuff processing, as a leather depilatory, the manufacture of rayon and organic chemicals and in the metallurgical industry. production of sodium hydrosulfide the usual laboratory synthesis entails treatment of sodium methoxide, naome, with hydrogen sulfide naome + h5s nahs + meohsurface properties of coppersulfide minerals with sodiumflotation recovery behavior is consistent with mineral surface analyses. abstract the surface properties of slightly oxidized chalcocite, bornite, and chalcopyrite with sodium hydrosulfide (nahs) treatment were investigated by solid analyses of xray photoelectron spectroscopy, solution analyses, andcited by 4flotation using nahs sodium hydrosulfide froth flotationflotation using nahs sodium hydrosulfide (1 reply) i work in the g mine mill were we extract g and silver from both oxide, sulphate and transitional ore at mill rate of 680 t/h, just now we introduce nash replacing copper at flotation other reagent in place froth, promoter, pax.estimated reading time 1 minca23688c base metal mineral flotation processesca23688c ca0023688a ca23688a ca23688c ca 23688 c ca23688 c ca 23688c ca 0023688 a ca0023688 a ca 0023688a ca 23688 a ca23688 a ca 23688a ca 23688 c ca23688 c ca 23688c authority ca canada prior art keywords mineral sulphide base metal flotation pulp prior art date 9415 legal status (the legal status is an assumption and isorfom d8 a viable replacement for nahs as a depressantjan 01, · introduction depressants are incorporated in mineral flotation units in the minerals processing industry to make or keep certain minerals selectively hydrophilic. most reagents used are inorganic and include, for instance, sodium hydrosulphide (nahs) which is the major reagent used for depressing sulphide minerals, particularly those containingapplication of cellulose derivatives in mineral processingjun 01, · the flotation separation is used in the processing of metals like copper, g, and platinum to produce concentrates that can be refined economically. efforts are currently being made to better understand the various phenomenon like frother phenomenon, adsorption etc. and how to regulate it, but no genuinely innovative frother method has been

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The case of sodium hydrosulphide in the flotation of g

kilcrest botswana mineral processingour product range is widely used for the flotation of nickel, platinum, copper, lead, zinc and g, group elements and others. it covers the organic and inorganic chemistries. starch depressants manufactured by tradepex; modified guars and cellulose depressants ; copper sulphate ; sodium hydrosulphide (nash ) copper sulphatethe role of sodium sulfide in the flotation of pyriteapr 01, · in copperg flotation plants, pyrite which is depressed in copper flotation is often floated subsequently with the addition of sodium sulfide (na 2 s) to recover the associated g. for the first time, this study investigated the role of na 2 s responsible for the flotation of pyrite depressed in chalcopyrite flotation through flotation tests and cyroxps (xray photoelectron spectroscopycited by 26g flotation mineral processing metallurgyjul , · where a high sulphide recovery is demanded, flotation methods are now in general use, but in the days before flotation was known, a large part of the worlds g was recovered by concentrating the gbearing sulphides on tables and smelting or regrinding and amalgamating the product. though the modern trend is away from the use of tables, because flotation is so much morek. flota tion of a silicated oxide coppercobalt oresulphidizing flotation effect of sodium hydrosulphide the results shown in figure 2 were achieved witll a dosage of 400 g/t pnbx, 0 g/t of tlle mixture, 250 g/t na 2si03, 30 g/t senfroth g41 and 400 g/t na si03. best results were recorded at 4 g/t nahs 94.8 % cu and 90.1 % co were recovered in a concentrate assayingpumps and systems for mining lewalewa highpressure plunger pumps. the lewa highpressure plunger pump meets the conditions for onshore and offshore applications in accordance with api 674. its small space requirements and light weight make the highpressure pump ideal for use specifically in the oil and gas industry, refineries and the petrochemical industry. more details.william f. riggs the american institute of miningwilliam riggs attended utep in el paso, texas graduating in 60 in geology and chemistry. he commenced work furnishing chemicals to the uranium industry and later furnishing technical support to copper molybdenum flotation. then he built a stronger market in flotation for modified fatty acids, fatty amines, and pine oil. afterwards he developed a market for sodium hydrosulfide, ammonium

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