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depressants in froth flotation

Flotation Depressants - Mineral Processing Metallurgy

First let’s change the amount of the Flotation Depressants used. The valuable mineral that isn’t liberated from the unwanted mineral will begin to be depressed along with the waste. For the floatation operator, the change that will become most apparent is, that the color of the froth will begin to reflect more of the wanted mineral’s color. This is because the froth

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What is the role of depressant in froth floatation process?

2019-02-19  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 come with froth, but prevents ZnS from coming to froth.

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CA1189863A - Depressants for froth flotation - Google Patents

Depressants for froth flotation Info Publication number CA1189863A. CA1189863A CA000430704A CA430704A CA1189863A CA 1189863 A CA1189863 A CA 1189863A CA 000430704 A CA000430704 A CA 000430704A CA 430704 A CA430704 A CA 430704A CA 1189863 A CA1189863 A CA 1189863A Authority CA Canada Prior art keywords alkyl

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Depressants for froth flotation - Sentrachem Limited

Depressants for froth flotation . United States Patent 4657669 . Abstract: The ... (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. Inventors: Shaw, Peter (Randburg, ZA) Coetzee,

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Flotation Conditioners -Modifiers -Activators -Depressants

This branch of chemicals will prepare the mineral surface so other reagents will be able to collect the metal. For Conditioners and Modifiers, it may be simply cleaning the surface of the particles, as in the case of removing oxidization, or it may be a chemical that these are the chemicals that bind the mineral to the air bubble to be lifted away from the waste. Activators will attach itself ...

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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

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

Two types of depressants carboxymethyl cellulose (CMC) and guar gums which are usually used in the flotation of PGE bearing ores were used. The frother was Dow 250. Results showed that increasing either guar or CMC dosages from 50 to 100 g/t enhanced the recovery of copper and nickel sulphides.

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US 4,657,669 A - Depressants for froth flotation RPX Insight

Depressants for froth flotation US 4,657,669 A; Filed: 07/19/1985; Issued: 04/14/1987; Est. Priority Date: 06/17/1982; Status: Expired due to Fees × Create Patent Alert District Court Events; PTAB Events; ITC Events; Federal Circuit Events; RPX Reports; Alert Frequency; Daily (M-F) Weekly * Certain alert events are not available for your current subscription level. Upgrade.

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

Prasad (1992) defines the depressants as reagents which improve the interaction of the mineral surfaces where flotation is not desired with the molecules of

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CA1328512C - Flotation depressants - Google Patents

As an example, the flotation of iron-containing minerals, such as iron oxides or iron powder, is selectively depressed when compared to the flotation of silicate gangue thus facilitating the...

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What is the role of depressant in froth floatation process?

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 come with froth, but prevents ZnS from coming to froth.

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role of depressant in froth flotation process

2019-08-10  (ii)depressants are used to prevent one type of sulphide ore particles from forming the froth with air bubbles, e.g. sodium cyanide is used as a.use of depressants in the direct flotation of a silicate-carbonate .flotation is the most common process; however the selectivity is hampered by the . in brazil, this technique played an important role in the growth of the mineral

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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

More

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

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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Effect of Depressants and Temperature on Bastnaesite and ...

Flotation kinetics and the impact of depressants and temperature on gangue recovery are also seldom discussed. These aspects are important since many proposed REE projects intend to extract REE from deposits containing both bastnaesite and monazite.

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1 Froth Flotation – Fundamental Principles

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 Cell Bank Control Operation

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(PDF) Effect of different depressants on galena flotation

Flotation recovery of galena approached the highest value at pH 7 and decreased at pH 11 without any depressant. As a result of experiments it is

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Minerals Free Full-Text Effect of Depressants and ...

Sodium silicate is one of the most commonly used depressants in REE flotation [ 3, 9, 10, 11, 12 ], but the ideal dosage and potential interactions with

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Flotation depressants - The Dow Chemical Company

Flotation depressants . United States Patent 4808301 . Abstract: The flotation of desired mineral ores is selectively depressed by the use of an effective amount of a polycarboxylic acid or salt thereof in a reverse flotation process. As an example, the flotation of iron-containing minerals, such as iron oxides or iron powder, is selectively depressed when compared to the flotation

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(PDF) Identification of sodium silicate species used as ...

Abstract and Figures Sodium silicate (water Limestone) is a modifier reagent widely used in flotation with the function of a depressant or dispersant. The interaction between sodium silicate and...

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role of depressant in froth flotation process

2019-08-10  (ii)depressants are used to prevent one type of sulphide ore particles from forming the froth with air bubbles, e.g. sodium cyanide is used as a.use of depressants in the direct flotation of a silicate-carbonate .flotation is the most common process; however the selectivity is hampered by the . in brazil, this technique played an important role in the growth of the mineral

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Effect of Depressants and Temperature on Bastnaesite and ...

2.2. Froth Flotation Froth flotation was conducted in a standard 3 L stainless steel cell using a Denver D-12 flotation machine. The slurry was conditioned at 60 wt % solids. Tap water was added to bring the slurry solids fraction to 35 wt % for flotation. During conditioning and flotation, the slurry temperature was

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University of Alberta

2.6.2 Polymer Depressants ... Froth flotation is a complex physicochemical process that is accomplished in two distinct phases in a flotation cell: a pulp phase and a froth phase. The pulp phase is a mixture of an aqueous suspension composed of finely ground particles of ore minerals, water and air bubbles, along with dissolved chemical species such as frother, collector, etc. The froth

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Minerals Free Full-Text Effect of Depressants and ...

Froth flotation was conducted in a standard 3 L stainless steel cell using a Denver D-12 flotation machine. The slurry was conditioned at 60 wt % solids. Tap water was added to bring the slurry solids fraction to 35 wt % for flotation. During conditioning and flotation, the slurry temperature was controlled using an electrical water heater. The pH was measured but not

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US Patent for Depressants for froth flotation Patent ...

Depressants for froth flotation . Jul 19, 1985 - Sentrachem Limited. The invention concerns the use of 5-hydroxy-3-thiazolidine-2-thiones of the structure I ##STR1## where R.sub.1 =(CHOH).sub.m, R.sub.2 =(CHOH).sub.n where (m+n)=0 to 6, and R.sub.3 is alkyl or hydroxy-alkyl as depressants in the flotation of mixtures of base metal minerals, particularly those

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What is the role of depressant in froth floatation process?

What is the role of depressant in froth floatation process? 11.7 k . 500+ Text Solution. Solution : The role of depessant is to prevent one type of sulphide ore particles from forming the froth with air bubbles ,NaCN is used as a depressant to seqartate lead sulphide (PbS) one from zinc sulphide (Zn s)Ore . NaCN forms a zinc complex on the surface of ZnS thereby preventing it

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CHAPTER 3 COMPARISON OF DIFFERENT PYRRHOTITE DEPRESSANTS ...

depression mechanism of DETA on pyrrhotite, ... frother is added and the froth flotation started. The detailed flotation procedure would be mentioned when we proceed to the specific test. d. Assay : Sample of flotation concentrate and tails were collected, dried, weighed, and analyzed for the sulfur, nickel and cupper content in it. Nickel and copper were analyzed by AA, and

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Flotation depressants - The Dow Chemical Company

Flotation depressants . United States Patent 4808301 . Abstract: The flotation of desired mineral ores is selectively depressed by the use of an effective amount of a polycarboxylic acid or salt thereof in a reverse flotation process. As an example, the flotation of iron-containing minerals, such as iron oxides or iron powder, is selectively depressed when compared to the flotation

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Testing and evaluation of modifying reagents in potash ...

Depramin is the trade name for a series of water-soluble polymers specially developed as depressants for froth flotation by AKZO Salt and Basic Chemicals. Besides 44 potash flotation, the various types of Depramin are also used in the depression of talc in hard rock flotation. Guar Gum: The Guar Gum sample, Rantec KP 4000 used during the testing program was obtained

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carbonate depression in flotation

carbonate depression in flotation . GM stone crusher machine is designed to achieve maximum productivity and high reduction ratio. From large primary jaw crusher and impact crusher to cone crusher and VSI series for secondary or tertiary stone crushing, GM can supply the right crusher as well as complete crushing plant to meet your material reduction requirements.

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University of Alberta

2.6.2 Polymer Depressants ... Froth flotation is a complex physicochemical process that is accomplished in two distinct phases in a flotation cell: a pulp phase and a froth phase. The pulp phase is a mixture of an aqueous suspension composed of finely ground particles of ore minerals, water and air bubbles, along with dissolved chemical species such as frother, collector, etc. The froth

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US Patent for Depressants for froth flotation Patent ...

Depressants for froth flotation . Jul 19, 1985 - Sentrachem Limited. The invention concerns the use of 5-hydroxy-3-thiazolidine-2-thiones of the structure I ##STR1## where R.sub.1 =(CHOH).sub.m, R.sub.2 =(CHOH).sub.n where (m+n)=0 to 6, and R.sub.3 is alkyl or hydroxy-alkyl as depressants in the flotation of mixtures of base metal minerals, particularly those

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CHAPTER 3 COMPARISON OF DIFFERENT PYRRHOTITE DEPRESSANTS ...

depression mechanism of DETA on pyrrhotite, ... frother is added and the froth flotation started. The detailed flotation procedure would be mentioned when we proceed to the specific test. d. Assay : Sample of flotation concentrate and tails were collected, dried, weighed, and analyzed for the sulfur, nickel and cupper content in it. Nickel and copper were analyzed by AA, and

More

Testing and evaluation of modifying reagents in potash ...

Depramin is the trade name for a series of water-soluble polymers specially developed as depressants for froth flotation by AKZO Salt and Basic Chemicals. Besides 44 potash flotation, the various types of Depramin are also used in the depression of talc in hard rock flotation. Guar Gum: The Guar Gum sample, Rantec KP 4000 used during the testing program was obtained

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Examination of Flotation Reagents Suitable for Nickel ...

Laboratory Scale Flotation Work on Depressants The aim was to find a suitable depressant that will improve flotation performance in conjunction with Betacol 380 AC. Two reagents were formulated which were Betamin DTM1 and Betamin DTM2.

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Report on flotation pilot plant design and arrangement

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 bubbles are then carried to the surface and removed, while the particles that remain completely wetted stay in the liquid phase. Froth flotation

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Froth flotation of fluorite: A review Request PDF

Request PDF Froth flotation of fluorite: A review Fluorite, as a scarce non-renewable strategic non-metallic mineral resource, is the primary raw material for fluorine products used in diverse ...

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depressants in froth flotation - trainvedettes.be

Depressants for froth flotation Sentrachem Limited. nbsp 0183 32 FIELD OF THE INVENTION This invention relates to the reagents used in the concentration of minerals by froth flotation and in particular to the reagents known as depressants useful in selective recovery of base metal minerals from their ores . Sales Online . Introduction to Mineral Processing Chevron Phillips

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Flotation of Nickel-Copper Sulphide Ore: Optimisation of ...

Chemical analysis of this ore is shown in Table 1. 1% solutions of all flotation reagents i.e. collector (SIPX- sodium isopropyl xanthate) and depressant (Betamin 300) were used for the investigations and 10% solutions of both analytical grade sulphuric acid and sodium hydroxide were used as pH modifiers.

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