(pdf) effect of different depressants on galena flotationthe use of two or more depressants is referred to as a depressant system.research and development work has been carried out to develop and define depressant systems for beneficiation of massive sulphide lead-zinc, copper-zinc and copper-lead-zinc ores.alternatives for sodium cyanide for flotation contr
(pdf) effect of different depressants on galena flotationthe use of two or more depressants is referred to as a depressant system.research and development work has been carried out to develop and define depressant systems for beneficiation of massive sulphide lead-zinc, copper-zinc and copper-lead-zinc ores.alternatives for sodium cyanide for flotation control in the copper, lead, and zinc industries the primary uses for cyanides are as depressants for the flotation of iron and zinc minerals and for the reactiva- tion of copper minerals in the flotation of molybdenite.chapter 14: flotation of lead-zinc ores engineering36014.1 introduction. lead-zinc ores are the most abundant ores in the world and they are found in everywhere, such as north america, south america, balkan peninsula, europe, russia, australia and flotation experiment research on a polymetallic sulfide ore ofthe polymetallic separation flowsheet of copper/lead bulk flotation copper/lead separation priority flotation zinc and pyrite from the bulk flotation tailings was used. the concentrate indexes of the grade of copper, lead, and zinc were 20.87%, 49.91%, and 60.10%, respectively, and the recoveries were 75.59%, 91.62%, and 74.07%.selection and evaluation of different depressants systems selection and evaluation of different depressants systems for flotation of complex sulphide ores bulatovic, s.; wyslouzil, d.m. 1995-01-01 00:00:00 one of the most important families of chemicals used in mineral processing is depressants. most often, the flotation separation of individual minerals from complex massive ores is not possible without the use of these reagents.the effect of mode of occurrence of galena and flotation of sphalerite and pyrite at the concentrator. although cyanide is an effective depressant in selective flotation of sulphide minerals, considerable amounts of zinc are still recovered together with lead, reflecting poor selectivity during the flotation of galena at rosh pinah. high dosages of cyanide are required to overcome this situation.lead and zinc ores: flotation pdfs.semanticscholar.orgrecovering such valuable metals as lead (pb) and zinc (zn), or copper (cu) from ores. it is known that separation by sotation of useful (or depressants) capable of linking more selectively with a given element present 3216 iii/lead and zinc ores: flotation. figure 1 structure of mbt-pb chelate.chapter-9 froth flotation and its application to be used to achieve separation from complex ores such as lead-zinc, copper- zinc etc. initially developed to treat the sulphides of copper, lead, and zinc, the field of flotation has now expanded to include oxides, such as hematite and cassiterite,copper-zinc ores danafloat homecopper-zinc ores usually chalcopyrite, sphalerite and iron sulphides are present with this type of ore. gangue minerals are typically various silicates, carbonates, and often talc the latter which presents flotation challenges.wo1989010791a1 depressant for flotation separation of a new depressant for use in enhanced separation of polymetallic sulphides is described. the depressant agent is used in conjunction with convention collector agents and frothing agents in the flotation separation of copper, nickel, lead, zinc sulphides by depressing iron sulphides such as pyrrhotite, pyrite and marcasite in the tailing.froth flotation : recent trends flotation of sulphide froth flotation : recent trends @iime, jamshedpur, 1998; pp. 18-41 flotation of sulphide ores hzl experience v.p. kohad hindustan zinc ltd., zawar mines, udaipur 313 901 abstract flotation process, patented in the year 1906, was originally developed for mineral industry to recover values from high grade tailings of gravity separation plants.depressants for froth flotation sentrachem apr 14, 1987· the invention concerns the use of 5-hydroxy-3-thiazolidine-2-thiones of the structure i ##str1## where r 1 =(choh) m, r 2 =(choh) n where (m+n)=0 to 6, and r 3 is alkyl or hydroxy-alkyl as depressants in the flotation of mixtures of base metal minerals, particularly those containing molybdenum, copper, lead, zinc; and to flotation processes using these compounds.selection and evaluation of different depressants systems research and development work has been carried out to develop and define depressant systems for beneficiation of massive sulphide lead-zinc, copper-zinc and copper-lead-zinc ores. three major groups of depressants have been studied in various combinations.
selection and evaluation of different depressants systems most often, the flotation separation of individual minerals from complex massive ores is not possible without the use of these reagents. in practice, when treating complex sulphide ores, the use of two or more depressants is common, especially when a selectivity problem is present or separation of several valuable minerals is required.inorganic depressants for coppe lead zinc ores flotationinorganic depressants for coppe lead zinc ores flotation depressants researchgate in general, two or more inorganic depressants simultaneously combine and form various composite h2so3, so2, sulfaates, zinc sulfate, zincates, cao, and cyanide-containing compounds.alternatives for sodium cyanide for flotation control in the copper, lead, and zinc industries the primary uses for cyanides are as depressants for the flotation of iron and zinc minerals and for the reactivation of copper minerals in the flotation introduction to mineral processing chevron phillips chemicalcopper is also present in some ores. froth flotation is again employed to produce marketable concentrates of both. the process is identical in principle to the flotation of other minerals. the figure on the right is a simplified version of a pb/zn flotation circuit. the main difference in lead/zinc flotation is that zinc is usually depressed while lead (and copper) is floated.alternatives for sodium cyanide for flotation control in the copper, lead, and zinc industries the primary uses for cyanides are as depressants for the flotation of iron and zinc minerals and for the reactiva- tion of copper minerals in the flotation beneficiation of arsenic bearing complex sulphide lead-zinc ores, c) bulk flotation of copper-lead-zinc minerals followed by a selective arsenic is one of the most hazardous inorganic pollutants for both the environment the number of flotation stages, depressant type and dosage were studied on the selective concentration of cu, pb and zn minerals in the ore study on potential-controlled flotation test of a copper the study on potential-controlled flotation test of differential flotation process was carried out in the light of the change of a certain ore properties. the test used self-developed emz-91, as well as conventional collectors of ethyl thio carbamate and butyl xanthate for the flotation of copper, lead and zinc ores respectively, in which the copper sulfate was used as the activator of zinc flotation of lead-zinc ores researchgatehowever, for treatment of disseminated massive sulfide ores, a much more complex reagent scheme is used. the type of reagent schemes also varies by regions, where the application of new technology (i.e., new collectors and depressants) in some regions is very slow and the operating plants rely on the old conventional processes and technology. as for copperzinc ores, some of the leadzinc ores are a 'oncentrating lead-zinc copper sulfide ores by 502 mining and concentrating of lead zinc the two types of finer-grained galena are designated as "a-ln, which has shsrp linear boundaries with pj~i.te, and it).-2" which has a dull appearance and an etched replacement-like contact with pyrite.natural organic depressants for copper molybdenum ores flotation of copper-lead-zinc ores researchgate. in the flotation of copperzinc massive sulfide ores, the flotation properties of copper and zinc are determined by the nature and composition of the ore. into the flotation response of refractory molybdenum ore to depressant mixtures: a cas.copper-lead-zinc ores danafloat homeas described in the lead-zinc ore processing section, zinc sulphate and metabisulphide sphalerite and pyrite depressants, respectively, are typically added to grinding. then a cu-pb bulk concentrate is recovered with xanthate, dithiophosphate and flotation reagent blends.use of non-toxic depressants in the selective use of non-toxic depressants in the selective flotation of copper-lead-zinc ores 113 c anadian m etallurgical q uarterly , v ol 47, n o 2 sodium meta-bi-sulphite, znso 4, caustic starch and activated carbon were the depressants used wheredepressants and dispersants huntsman corporationiron sulfide (pyrite, pyrrhotite, marcasite) depressant used in the flotation separation of base metal sulphides. also used as an alternative partial cyanide replacement to depress iron and zinc sulfides in pb zn flotation. unimax ® sd210. iron sulfide (pyrite, pyrrhotite, marcasite) depressant used in the flotation separation of base metal sulfides.
modifiers for coppe lead zinc ores flotationmar 19, 2018· selection and evaluation of different depressants systems for flotation of complex sulphide ores of massive sulphide lead-zinc, copper-zinc and copper-lead-zinc ores. and depressants with multifunctional roles i.e. modifier-depressants.inorganic depressants for copper ores flotationsingle mineral flotation test shows that the slurry inexpensive compared with the widely used inorganic depressants. humate can be used as pyrite depressant in the separation of actual copper/lead ore with sodium humate as the.depressants and dispersants huntsman corporationdepressants and dispersants in mineral flotation the challenge is to maximize the recovery of desired minerals while rejecting unwanted gangue components. depressants are required to give a low affinity to active sites on valuable mineral surfaces and a high affinity for gangue minerals and some sulfides.use of aerophine 3418a promoter in the flotation of use of aerophine® 3418a promoter in the flotation of complex lead, copper and zinc minerals with high silver content 1. lead and copper flotation use zinc sulfate as a zinc depressant. add at your discretion in the mill, in the rougher and scavenger flotation and to the cleaners. sequential copperleadzinc flotationwith this process, copper was recovered first with mbs depression of lead, zinc and pyrite. lead was recovered after conditioning, utilizing cyanide as the base depression scheme to control sphalerite and pyrite. in these tests, a zinc flotation was also performed to measure the metallurgical performance of that metal. the flowsheet schematic and summary of test results. as shown in the summary tables, (pdf) utilization of polysaccharides as depressants for utilization of polysaccharides as depressants for the flotation separation of copper/lead concentrate article (pdf available) in international journal of mining science and technology 23(2):179 the effect of mode of occurrence of galena and sphalerite the flotation response of a pb-zn sulphide ore from the rosh pinah mine (namibia) was studied in the presence of inorganic depressants such as sodium cyanide and zinc sulphate.chapter 15: flotation of copper-lead-zinc ores the copper-lead-zinc ores have an origin similar to copper-zinc and lead-zinc ores, the exception being those ores that contain copper, lead and zinc as the principal economic minerals. in addition, some of these ores contain significant amounts of precious metals and, more rarely, cobalt and nickel.copper sulfate depressant mining educationcare.inessentially a co-product of zinc mining or a byproduct of copper and/or gold and mineral in which lead is found combined with sulfur is anglesite or lead . reagents that promote flotation (collectors, frothers, activators, and depressants).frothers for copper lead zinc ores flotationdifferential flotation of copper-zinc at prieska copper mines saimm. to develop a method of treatment to recover copper and zinc in saleable grades of con- centrates from the the sulphide minerals by flotation on a laboratory scale was started cannot be achieved without the use of depressants; there are, however .. discovered in 1922 at the timber butte lead-zinc mill,.how to process copper lead zinc ore with gold and silver conventional reagents are used in the selective flotation separation. these consist of zinc and iron sulfide depressants which are added to the grind and a collector and frother for the lead-copper sulfides. the zinc is floated with additional quantities of a collector and frother after conditioning with lime and copper sulfate. the ph of the lead circuit is approximately 8.0 and the zinc is 10.5 to 11.0.what is the importance of froth flotation in relation to according to he processing order of the useful mineral, the copper ore process mineral can be divided into precedence flotation, equivalent flotation, mixed flotation and partial flotation. the process choice of ore flotation is determined by the raw ore properties. here is a brief discussion of it.