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Froth floatation process used for the concentration of ...

Answer Text. is based on the difference in wettability of different minerls. uses sodium ethyl xanthate, C 2 H 5 O C S 2 N a as collector. uses NaCN as depressant in the mixture of ZnS and PbS when ZnS forms soluble complex and PbS forms froth. All are correct statements.

Metals and Metallurgy | NEB Grade 11 Notes | Inorganic ...

2021-3-15 · ii. Froth floatation process: This process is based on the preferential wetting of ore by oil. It is used for the concentration of sulphide ores like copper pyrite (CuFeS 2), zinc blende (ZnS), cinnabar (HgS), galena (PbS), argentite (Ag 2 S), etc. In this process, powdered ore is taken in a tank containing water and a small amount of pine oil.

Chapter 1 Basic Concept of Periodic Table

2014-11-12 · In the floatation process for the purification of minerals the particles float because (A) they are light (B) they are insoluble (C) their surface is preferentially wetted by oil (D) they bear an electrostatic charge. 2. Froth floatation process for the concentration of ores is an illustration of the practical application of

Selina Solutions Class 10 Concise Chemistry Chapter 7 ...

The process that is applied to concentrate it is froth floatation process; The concentrated ore is changed to the oxide by heating Zinc blende (ZnS) in the presence of excess air. The reaction is as follows: 13. An ore on being heated in air forms sulphurous anhydride. Write the process used for the concentration of this ore. Solution:

NaCN is sometimes added in the froth floatation process …

Sep 18,2021 - NaCN is sometimes added in the froth floatation process as the depressant when ZnS and PbS mineralsare extracted becausea)ZnS form soluble complexNa2[Zn(CN)4] while PbS forms frothb)Pb(CN)2is precipitated while on effect on ZnSc)PbS forms soluble complexNa2[Pb(CN)4] while ZnS frothd)NaCN is never added in froth floatation …

NCERT Solutions for Class 12 Chemistry Chapter 6

2021-4-1 · Q2. What is the role of depressant in froth floatation process? Solution: The role of a depressant in forth floatation is to set apart two sulphide ores through selective prevention of one ore from frothing. E.g. NaCN is used to separate two sulphide ores, PbS and ZnS. NaCN forms a complex, Na 2 [Zn( CN ) 4

29. EXTRACTIVE METALLURGY

2019-2-13 · Froth Floatation Process: This process is used to separate the sulphide ore from the impurity in the ore. It is based upon the differential wetting of the ore by oil and the impurity by water. In this process, the ore is ground to fine powder and mixed with water to form a slurry mixture. Any one of the oily components, such as pine oil,

Characterization and Flotation of Sulfur from …

2013-12-24 · However, the cost of the process of removing selenium and tellurium is relatively high. To make the process more economically feasible, the feed to the process should have a high sulfur content. The objective of this study is to upgrade the sulfur content of the leaching residue of sulfide ores or concentrates through froth flotation technique.

Froth Flotation

Froth Flotation. Froth flotation is a surface chemistry based separation process which is extensively used in the processing of mineral ore deposits as a method of separating the desired mineral component from their associated gangue material [17,34]. From: Advances in Colloid and Interface Science, 2005.

In froth-floatation process, palm oil functions as :a ...

2019-2-12 · Sep 24,2021 - In froth-floatation process, palm oil functions as :a)Activatorb)Frotherc)Collectord)AgitatorCorrect answer is option ''B''. Can you explain this answer? | EduRev Class 12 Question is disucussed on …

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

2021-6-24 · In the Froth floatation process for beneficiation of the ores, the ore particles float because (a) they are light (b) their surface is not easily wetted by water. (c) they bear electrostatic charge (d) they are insoluble. Answer. Answer: (b) their surface is not easily wetted by water.

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Froth floatation process for the concentration of ores is a practical application of: 1. adsorption. 2. absorption. 3. coagulation. 4. sedimentation

State briefly the principles which serve as basis for the ...

(i) Froth floatation process: This method has been in use for removing gangue from sulphide ores. In this process, a suspension of the powdered ore is made with water. To it, collectors and froth stabilizers are added. Collectors (e.g., pine oils, fatty acids, xanthates etc.) enhance non-wettability of the mineral particles and froth stabilizers (e.g., cresols, aniline) stabilizes the froth ...

IJMMME

2020-1-20 · Figure 7. Grade-recovery curve of the Gonçalo lepidolite froth flotation. Similarly to what occurred with spodumene, it was not possible to obtain concentrates with Li 2 O grades close to the Gonçalo lepidolite Li 2 O content (5.58 % Li 2 O [31]), even after the cleaning stage, having been 4.50 % Li 2 O the maximum value achieved. The shape of the grade-recovery …

Flotation Reagents

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.. …

One of the processes used for concentration of ores is ...

2021-6-2 · Froth floatation process used for the concentration of sulphide ore. Which of the following statements are correct
(a) It is based on the difference in wettablity of different minerals
(b) Sodium ethyl xanthat, Na is used as collector
(c ) NaCN is used as depressant of ZnS and PbS

General Principles of Extraction of Metals

2019-7-11 · The process Of converting hydrated hydrous alumina is called: into an- (a) Roasting (c) Dressing Pyrolusite is ala (a) Oxide (c) (GarbldË (b) Srhelting d) alcination (b) Su}phide ore (d) Not an ore 1. 3. 4. 5. Froth floatation process is used for the; (a) Oxide ores (c) Chloride ores (b) Sulphide ores (d) All of these position of azurite ...

Extraction of Nickel

2021-9-9 · It is placed with hydrogen and carbon monoxide gases at 122 degrees Fahrenheit, which converts it to impure nickel. Nickel is also a magnetic metal below 653 degrees Fahrenheit. It is somewhat reactive with dilute nitric, …

state briefly the principles which serve as basis for the ...

2014-6-4 · (i) Froth floatation process: This method is based on the difference in the wettability of the mineral particles (sulphide ores) and the gangue particles. The mineral particles become wet by oils while the gangue particles by water and hence gets separated.

Froth Flotation Method Is Used For Concentration Of

Froth Floatation Process Used For The Concentration Of . Froth floatation process used for the concentration of sulphide ore.Which of the following statements are correct a it is based on the difference in wettablity of different minerals b sodium ethyl xanthat, c2h2ocs2 na is used as collector c nacn is used as depressant of zns and pbs.

Describe the principle of froth floatations process. What ...

Froth floatation process: This process is based on the fact that the sulphide ore particles are only moistened with oil, whereas oxide and gangue particles are moistened by water. For this, the powdered ore is mixed with water and a little pine oil and whole mixture is then stirred vigorously through rotating paddle by blowing compressed air. The oil forms a foam or froth with air. The …

The function of potassium ethyl xanthate in froth floatation

heavier. 5%. Solution: The function of potassium ethyl xanthate in froth floatation process is to make the ore Water repellant. The metallic ore particles are preferentially wetted by the oil and rise to the surface along with the froth. Other oils used are pine oil, eucalyptus oil and fatty acids.

Gemini surfactant: A novel flotation collector for ...

2019-3-1 · Froth flotation has been proved to be a promising approach for commercial scale harvesting of microalgae. However, all the surfactants used in the microalgae flotation harvesting process are conventional monomeric surfactants contain a single similar hydrophobic group in the molecule, which results in a low harvesting efficiency.

Explain froth floatation process.

2020-8-19 · A froth is generated by blowing air through this mixture. The collector molecules attach to the ore particle and make them water repellent. As a result, ore particles, wetted by the oil, rise to the surface along with the froth. The froth is skimmed off and dried to recover the concentrated ore.

Marked questions are recommended for Revision. PART …

2020-9-12 · A-9. NaCN is sometimes added in the froth flotation process as a depressant when ZnS and PbS minerals are expected because : (A) Pb(CN) 2 is precipitated while no effect on ZnS. (B) ZnS forms soluble complex Na 2 [Zn(CN) 4] while PbS forms froth (C) PbS forms soluble complex Na 2 [Pb(CN) 4] while ZnS forms froth.

Froth floatation process used for the concentration of ...

 · Answer Text. is based on the difference in wettability of different minerls. uses sodium ethyl xanthate, C 2 H 5 O C S 2 N a as collector. uses NaCN as depressant in the mixture of ZnS and PbS when ZnS forms soluble complex and PbS forms froth. All are correct statements.

This Section is not meant for classroom discussion. It is ...

2020-9-12 · In the froth floatation process for the purification of minerals the particles float because : (1) they are light. (2) they are insoluble. (3) their surface is preferentially wetted by oil. (4) they bear an electrostatic charge. 4. An ore of tin containing FeCr 2 O 4 is concentrated by : (1) magnetic separation (2) froth floatation

Metals and Non-Metals Extra Questions and Answer | …

2021-7-13 · In Froth Floatation process —— ores of the metals are concentrated. ... Na, K, ca and mg are alkali and alkaline earth metals. They are most reactive metal and readily react with most atmospheric oxygen and other gases .Therefore they are found in their free state in nature.

CBSE NCERT Solution for Class 12

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. This happens because ...

Flotation Process

James McClelland, in Treatise on Process Metallurgy: Industrial Processes, 2014. 1.2.2.1.2.2.1 Froth Flotation. The froth flotation process is more than a century old and was developed over a long period of time [8]. It takes advantage of the surface chemistry of fine particles—if one particle''s surface is hydrophobic and another is ...