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what is the role of depressants in froth flotation process

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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What is the role of depressant (NaCN) in Froth-Flotation ...

Best answer. (i) It prevents froth formation by one sulphide ore and allowing the other to come into froth. (ii) If the ore contains mixture of ZnS and PbS, NaCN allows PbS to come with froth and ZnS to sink. (iii) It helps to separate two sulphide ores in a mixture like ZnS and PbS. Please log inor registerto add a comment.

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Whats the Role of Flotation Froth in the Flotation Process ...

In the flotation process, there is one thing that plays a very important role in the whole processflotation froth. So what's the role of flotation froth in the flotation process? Motor triangular belt drives the impeller to rotate, and the centrifugal effect forms the negative pressure, then the flotation froth is formed under the ...

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What's the Function of Flotation Froth in the Froth Flotation ...

The theoretical basis of flotation cell is approximately same, namely the separation process is realized by flotation froth in the pulp according to the physical and chemical properties of mineral particles. In the froth flotation process, there is one thing that plays a very important role in the whole processflotation froth.

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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 a depressant in froth flotation process ...

What is the Action of Hydrochloric Acid(HCL) on 0.1% Bromothymol Blue :- Answer all the questions.3 x 2 = 6MA mixture of oxygen and ethyne is burnt for welding ; can you tell why a mixture of ethyne and airis not used ?

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ROLE OF DEPRESSENT IN FROTH FLOATATION PROCESS - Chemistry ...

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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What is Froth Flotation?

Froth flotation is a process using air bubbles to separate materials based on their relative affinity to water. Bubbles carry reagent and hydrophobic materials to the top of a tank where they can be removed. Froth flotation has been used for more than a century in mining operations to separate valuable materials from excavated ores.

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Froth Flotation Process - Detailed Explanation With Diagrams ...

They increase the Selectivity of flotation, by preventing one mineral from flotation while allowing another mineral to float unrestricted. Depressants can be classified into two categories. Inorganic depressants such as Sodium cyanide, Zinc sulphate etc. Organic depressants such as Starch, tannin, Quebracho, Dextrin etc. pH Modifiers

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What is the role of depressant in froth floatation process?

Answer. 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.

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Handbook of Flotation Reagents | ScienceDirect

Activators, depressants, and pH regulators are often referred to as modifiers or regulators of the flotation process. The main purpose of these reagents is to modify the action of the collector on mineral surfaces and as a consequence govern the selectivity of the flotation process.

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What is the Role of Flotation Froth in the Flotation Process ...

The role of the reagent is to increase the stability of the mineralized froth during the flotation, and allow air dispersion and froth formation to proceed independently. Besides, it increases the hydrophobicity of the natural mineral surface and strengthens the separation of hydrophilic and hydrophobic particles.

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Role of Collectors and Depressants in Mineral Flotation: A ...

A theoretical analysis was conducted to study the role of collectors and depressants in flotation, based on the extended DerjaguinLandauVerweyOverbeek (DLVO) theory, where the hydrophobic force is considered. The collector-coated hydrophilic particle and the depressant-coated hydrophobic particle are simplified to a sphere uniformly covered with respectively hydrophobic and ...

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What is the Role of Flotation Froth in the Flotation Process ...

The role of the reagent is to increase the stability of the mineralized froth during the flotation, and allow air dispersion and froth formation to proceed independently. Besides, it increases the hydrophobicity of the natural mineral surface and strengthens the separation of hydrophilic and hydrophobic particles.

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Important Questions for Class 12 Chemistry Chapter 6 General ...

(ii) NaCN is used as a depressant to separate PbS ore from ZnS in froth flotation process. Question 56. Write the principle behind the froth floatation process. What is the role of collectors in this process? (All India 2014) Answer: Froth floatation method : This method is used for removing gangue from sulphide ores.

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What is the role of depressant (NaCN) in Froth-Flotation ...

NaCN is added in the froth flotation process ZnS does not form the froth because asked Apr 10, 2019 in General principles and process of Isolation of metals by Simrank ( 72.0k points) general principles

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(Solved) - what is the role of depressant in froth floatation ...

In the froth flotation process we want some substances to settle down and some substances to float. Now naturally, the sulphide of the substance we want to extract will float and the "gangue" or useless material will sink. However, sometimes the ore we are using also has other sulphides present in it as impurities.

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What is the role of depressants in the froth floatation ...

Answer:-. ️Depressants prevent certain type of particles to form froth during froth flotation process, This helps to separate two sulphide ores. ️For example:- In case of an ore containing zinc sulphide (ZnS) and lead sulphide (PbS) , sodium cyanide ( NaCN) is use as depressant. NaCN (depressant) prevents ZnS to form froth.

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Frothers - an overview | ScienceDirect Topics

Since froth flotation (and oil agglomeration) relies on the surface properties of coal in separating particles, coal petrology plays an important role in the process. Arnold and Aplan (1989) reported a number of studies which examined maceral partitioning or lithotype partitioning, generally without consideration of the maceral association.

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(PDF) The Potential Role of Colloidal Silica as a Depressant ...

The Potential Role of Colloidal Silica as a Depressant in Scheelite Flotation ... Surface Free Energy Heterogeneity and its Implications for the Flotation Process. ... Froth flotation of scheelite ...

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What is the role of a depressant in froth flotation process ...

What is the Action of Hydrochloric Acid(HCL) on 0.1% Bromothymol Blue :- Answer all the questions.3 x 2 = 6MA mixture of oxygen and ethyne is burnt for welding ; can you tell why a mixture of ethyne and airis not used ?

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what is the role of each of the following in froth floatation ...

what is the role of each of the following in froth floatation process i collectors ii froth stabilizers iii depressants - Chemistry - TopperLearning.com | y21t9dvxx

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Flotation Depressants - Mineral Processing & Metallurgy

First lets change the amount of the Flotation Depressants used. The valuable mineral that isnt 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 minerals color. This is because the froth is becoming purer as ...

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