depressants in froth flotation

What is the role of depressant in froth floatation process?

Depressants prevent certain types of particles from forming froth with bubbles. Due to this, we can separate two sulphide ores. For example, sodium cyanide is a depressant used for an ore containing Z nS and P bS. N aC N forms a layer of the complex N a2. ] on the surface of Z nS and prevents it from forming a froth. Thus, it acts as a depressant.

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US4657669A - Depressants for froth flotation - Google

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.

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Pyrrhotite Depressant in Polymetallic Flotation - Froth ...

2021-9-22  The vast majority of laboratory flotation test programs are performed with fresh water. Improvements in selectivity arising from a reagent recipe may be aided, or impeded, by the ions present in the actual plant process water. Sometimes suspended solids or organic matter in the water reclaimed from the tailings pond may also impact flotation.

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The interactive effect of depressant type and dosage with ...

Depending on dosage, depressants may also affect the recovery of the valuable minerals in the ore positively by slime cleaning or negatively by depression. Depression of stabilising gangue minerals such as talc decreases the froth stability and may also affect the recovery of valuables. Frothers are added to flotation systems to create stable ...

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Depressants in Non-Sulfide Mineral Flotation Request PDF

Depression areas in flotation graphs produced by the adsorption of a second layer in froth flotation February 1991 Mining Metallurgy Exploration E.E. Rossi

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1 Froth Flotation – Fundamental Principles

2009-8-27  Froth flotation is a good example of an engineering “system”, in that the various important parameters are highly inter-related, as shown in Figure 1. It is therefore important to take all of Chemistry Components Collectors Frothers Activators Depressants pH Equipment Components Cell Design Agitation Air Flow Cell Bank Configuration

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Use of depressants in the direct flotation of a silicate ...

1. Introduction. Flotation is the most common concentration process used by the mineral industry, both in quantity of ores processed and in diversity of applications (Peres et al, 2007).At present, over 2 x 10 9 t per year of ore is estimated to be processed through flotation. In Brazil, this technique played an important role in the growth of the mineral sector, especially in the industry of ...

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The effect of frother type and dosage on flotation ...

2012-10-1  The frothers, Dowfroth 200 (DOW 200) and Dowfroth 250 (DOW 250), supplied by Betachem were added at dosages of 40, 50 and 60 g/t.The collector, sodium isobutyl xanthate (SIBX), supplied by Senmin was added to the mill prior to grinding at a dosage of 150 g/t.The polymeric depressants used in the batch flotation tests were Depramin 267, a carboxymethylcellulose (CMC) supplied by AKZO

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Dolomite depressants in the flotation of apatite and ...

A number of different chemical substances were evaluated for their ability to depress dolomite in the flotation of apatite and collophane from dolomite. Carboxymethyl cellulose was found to be the best depressant and citric acid and naphthyl anthyl sulfonates were found to

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Measurement of froth zone and collection zone recoveries ...

2019-7-1  This paper reports the measured froth zone (R f) and collection zone (R c) recoveries in the flotation of pure quartz, pure hematite, and a quartz-hematite mixture with one of three corn starches with different mass ratios of amylose to amylopectin: waxy starch (0:100), normal starch (27:73), and Gelose 50 (50:50).The flotation tests were carried out at continuous mode using a three-product ...

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What is the role of depressant in froth ... - SaralStudy

In the froth floatation process, the role of the depressants is to separate two sulphide ores by selectively preventing one ore from forming froth. For example, to separate two sulphide ores (ZnS and Pbs), NaCN is used as a depressant which selectively allows PbS to

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Flotation Reagents - Mineral Processing Metallurgy

2016-6-8  This data on chemicals, and mixtures of chemicals, commonly known as reagents, is presented for the purpose of acquainting those interested in froth flotation with some of the more common reagents and their various uses.. Flotation as a

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What is the role of depressant in froth floatation process?

Depressants prevent certain types of particles from forming froth with bubbles. Due to this, we can separate two sulphide ores. For example, sodium cyanide is a depressant used for an ore containing Z nS and P bS. N aC N forms a layer of the complex N a2. ] on the surface of Z nS and prevents it from forming a froth. Thus, it acts as a depressant.

More

What is the role of depressant in froth ... - SaralStudy

In the froth floatation process, the role of the depressants is to separate two sulphide ores by selectively preventing one ore from forming froth. For example, to separate two sulphide ores (ZnS and Pbs), NaCN is used as a depressant which selectively allows PbS to

More

The interactive effect of depressant type and dosage with ...

Depending on dosage, depressants may also affect the recovery of the valuable minerals in the ore positively by slime cleaning or negatively by depression. Depression of stabilising gangue minerals such as talc decreases the froth stability and may also affect the recovery of valuables. Frothers are added to flotation systems to create stable ...

More

what is the role of Depressant in froth floatation method ...

2012-1-17  Depressants prevent certain type of particles from forming froth during froth floatation process. A common depressant used in the froth floatation of lead sulphide is sodium cyanide. When the ore containing ZnS and PbS is subjected to froth floatation process in the presence of NaCN, then only PbS forms the froth.

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Depressants in Non-Sulfide Mineral Flotation Request PDF

Depression areas in flotation graphs produced by the adsorption of a second layer in froth flotation February 1991 Mining Metallurgy Exploration E.E. Rossi

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University of Kentucky UKnowledge

2013-11-8  DEPRESSANTS . Froth flotation is the most efficient method for phosphate separation, which is a physic-chemical separation process based on the difference of surface properties between the valuable minerals and unwanted gangue minerals. However, the presence of clay slimes in the slurry after grinding consumes a large amount of reagents ...

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Trithiocarbonates as depressants in ore flotation ...

In another aspect of the invention it relates to the use of flotation agents and flotation depressants in the recovery of minerals from their ores. Froth flotation is a process for concentrating minerals from ores. In a froth flotation process, the ore is crushed and wet ground to obtain a pulp. Additives such as collecting or mineral flotation ...

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The effect of frother type and dosage on flotation ...

2012-10-1  The frothers, Dowfroth 200 (DOW 200) and Dowfroth 250 (DOW 250), supplied by Betachem were added at dosages of 40, 50 and 60 g/t.The collector, sodium isobutyl xanthate (SIBX), supplied by Senmin was added to the mill prior to grinding at a dosage of 150 g/t.The polymeric depressants used in the batch flotation tests were Depramin 267, a carboxymethylcellulose (CMC) supplied by AKZO

More

Dolomite depressants in the flotation of apatite and ...

A number of different chemical substances were evaluated for their ability to depress dolomite in the flotation of apatite and collophane from dolomite. Carboxymethyl cellulose was found to be the best depressant and citric acid and naphthyl anthyl sulfonates were found to

More

The role of sodium sulfide in the flotation of pyrite ...

2018-4-1  In copper-gold 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 gold. 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 Cyro-XPS (X-ray photoelectron spectroscopy ...

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Pyrite depressants useful in the separation of pyrite from ...

Selective flocculation for increased coal recovery by froth flotation: 1981-05-19: Paulos: 209/166: 4261699: Process for removal of sulfur and ash from coal: 1981-04-14: Sun et al. 44/1SR: 4211642: Beneficiation of coal and metallic and non-metallic ores by froth flotation process using polyhydroxy alkyl xanthate depressants: 1980-07-08 ...

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What is the role of : ( i) Depressants in froth floatation ...

2021-4-26  What is the role of : ( i) Depressants in froth floatation ? (b) Carbon monoxied in Mond's process ? ( c) Concentrated sodium hydroxide in leaching of alumina from bauxite ? 41275725 15.7k+ 25.4k+ Leaching is a process of concentration of

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University of Kentucky UKnowledge

2013-11-8  DEPRESSANTS . Froth flotation is the most efficient method for phosphate separation, which is a physic-chemical separation process based on the difference of surface properties between the valuable minerals and unwanted gangue minerals. However, the presence of clay slimes in the slurry after grinding consumes a large amount of reagents ...

More

what is the role of Depressant in froth floatation method ...

2012-1-17  Depressants prevent certain type of particles from forming froth during froth floatation process. A common depressant used in the froth floatation of lead sulphide is sodium cyanide. When the ore containing ZnS and PbS is subjected to froth floatation process in the presence of NaCN, then only PbS forms the froth.

More

Trithiocarbonates as depressants in ore flotation ...

In another aspect of the invention it relates to the use of flotation agents and flotation depressants in the recovery of minerals from their ores. Froth flotation is a process for concentrating minerals from ores. In a froth flotation process, the ore is crushed and wet ground to obtain a pulp. Additives such as collecting or mineral flotation ...

More

Pyrite depressants useful in the separation of pyrite from ...

Selective flocculation for increased coal recovery by froth flotation: 1981-05-19: Paulos: 209/166: 4261699: Process for removal of sulfur and ash from coal: 1981-04-14: Sun et al. 44/1SR: 4211642: Beneficiation of coal and metallic and non-metallic ores by froth flotation process using polyhydroxy alkyl xanthate depressants: 1980-07-08 ...

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What are the three major froth flotation reagents?

2020-6-18  In the froth flotation process, chemical substances containing Cu 2+ and Ca 2+ are usually used as activators; In contrast to activators, depressants reduce the flotation ability of minerals by ...

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NaCN is sometimes added in the froth flotation process ...

Hint: In the Froth flotation process, depressants help to separate two sulphide ones by selective prevention of froth formation by one ore and allowing the other to come info froth.Sodium cyanide is added so that it can form complex with the unwanted sulphide so that wanted sulphide ore can be easily extracted. Complete step by step solution:

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Mining - Nouryon

Our optimized flotation collectors are designed to meet environmental regulations, enhancing recovery and providing a high rate of flotation and good froth. Our mining portfolio includes flotation collectors, depressants, frothers, dewatering aids and additional process aids as well. We can help improve your enrichment rates if you work with ...

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Flotation Behavior of Complex Sulfide Ores in the Presence ...

2017-6-12  Flotation Behavior of Complex Sulfide Ores in the Presence of Biodegradable Polymeric Depressants. Muhammad Badar Hayat,1,2 Lana Alagha,1 and Syed Mohammad Sannan3. 1Department of Mining and Nuclear Engineering, Missouri University of Science and Technology, Rolla, MO 65401, USA. 2Mining Engineering Department, University of Engineering and ...

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The effect of copper sulphate addition on the recovery of ...

2009-8-27  flotation. The DOW 200 frother was added at a concentration of 30 g/ton to create a suitably stable froth phase where the valuable minerals could be collected for further processing. Batch flotation procedure The flotation experiments were performed using a 3-litre Leeds batch cell in the Mineral Processing Laboratory at UCT.

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Recent Developments and Advances in Formulations and ...

Froth flotation is a surface chemistry-based unit operation that involves the capture of hydrophobic particles by air bubbles in aqueous slurry, followed by levitation and collection in a froth layer.

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Optimisation of Spodumene Ore Flotation using Zeta

2019-4-1  and iron) sparked noticeable peaks of froth flotation usages in large scales in 1960 and 1980 [24]. There are six types of reagents used in froth flotation; these are activators, depressants, collectors, flocculants, frothers and modifiers.

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Froth flotation process and its application

2021-8-14  Flotation, surfactants, collectors, activators, depressants, metallurgy. 1. INTRODUCTION Froth flotation is a widely used metallurgical technique which is used in different fields like mineral processing, waste water treatments etc. During early 20th century this revolutionary

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