Important Questions for Class 12 Chemistry Chapter 6

Dec 06, 2019· Froth floatation method : This method is used for removing gangue from sulphide ores. In this powdered ore is mixed with collectors e.g. pine oils, fatty acids etc. and froth stabilisers e.g. cresols, aniline which enhance nonwettability of the mineral particles and froth stabilisation respectively.

Why is the froth flotation method selected for the

Why is the froth flotation method selected for theThe sulphide ores preferably wetted by the oil and the gangue with the water.the flotation method is used to separate substances that

Notes on Extraction Of Metals: MetallurgyGrade 11

Froth Floatation Process This is the method based on the principle that different solids have different behavior towards oil and water. Thus certain metal sulphides such as PbS, ZnS, CuFeS 2 , etc. are wetted by certain oils like pine or eucalyptus oil or various

Froth Flotation and Gold ExtractionMGS Precious Metals Blog

Jul 23, 2014· In gold mining, froth flotation is used to separate gold from gangue by utilizing golds hydrophobicity. First, refractory gold ore is ground as finely as possibleusually so the individual grains are much less that 100 micrometers. The ground up ore is mixed with water to create a slurry,

Flotation Frothan overviewScienceDirect Topics

Froth flotation is used to raise the low mineral concentrations in ores to concentrations that can be more economically processed. A concentration of 2530% is suitable for economical smelting of copper.

Which ores are concentrated by froth flotation process

Sep 27, 2011· One example of the way in which an ore can be purified is the froth flotation method used with ores of copper, zinc, and some other metals.

Enrichment of Ore or Concentration of Ore

ENRICHMENT OF ORE OR CONCENTRATION OF ORE.Oxide ores of tin and lead are concentrated by this method. 2. Froth Floatation Process This method is used for concentration of sulphide ores of copper, lead and zinc. In this method, powdered ore is put in

Froth Flotationan overviewScienceDirect Topics

Froth flotation is used to raise the low mineral concentrations in ores to concentrations that can be more economically processed. A concentration of 2530% is suitable for economical smelting of copper.

Which ores are concentrated by froth flotation process

Sep 27, 2011· One example of the way in which an ore can be purified is the froth flotation method used with ores of copper, zinc, and some other metals. In this method, impure ore taken from the ground is first ground into a powder and then mixed with water and a frothing agent such as pine oil.

Froth Flotation ProcessMineral Processing & Metallurgy

Which one of the following ores is best concentrated by

Sulphide ores are concentrated by froth flotation method. e.g. Galena PbS.Sulphide ores are concentrated by froth flotation method. e.g. Galena PbS.This end is cut off. In this way, the impurities are swept from one end of the bar to the other. By repeating the process, ultra pure metal of silicon, germanium etc are obtained. Fig

Steps involved in Extraction of metalsWinner Science

Jul 28, 2012· In this process, the crushed ore is placed over a conveyer belt, which rotates around two metal wheels, one of which is magnetic. The magnetic particles are attracted to the magnetic wheel and fall separately apart from the non magnetic particles. Due to this separation occurs and process is called magnetic separation. c Froth floatation

Name the depressant which is used to separate ZnS and PbS

Sodium Cyanide is the depressant that is used to separate and ores in the froth flotation process. Minerals are separated from their respective ores through many processes called calcination, roasting, magnetic separation, froth flotation, etc. In the froth flotation method, depressant are used to separate two ores.

Why is the froth flotation method only used for sulphide ores?

In froth floatation process, advantage is taken of prefferential wetting of ore particles by oil and gangue particles by water. Pine oil or eucalyptus oil has tendency to wet metal sulphides. Thus sulphide ore is present in oily froth whereas gangue particles settle at the bottom,and hence fuller concentration is

The method of froth flotation of ores of metals

There is a method of froth flotation of ores of metals containing easily platerowane silicate minerals and at least one valuable mineral, including grinding the original ore, mixed with water crushed ore to the formation of the aqueous mineral slurry, introducing the slurry of Frother and collector of valuable minerals, conditioning and flotation emitting at least one valuable component in the foam is the way

What is Concentration of Ore? Definition and Methods

To obtain a pure metal from ore, the method of ore concentration is a very crucial step. For the extraction of metal, it is necessary to separate ore from the gangue particles. Ore found in the earth contains many impurities like sand, grit, rocks etc. which are collectedly known as Gangue.

Introduction to Mineral ProcessingChevron Phillips Chemical

Froth flotation is considered to be the most widely used method for ore beneficiation. In ore beneficiation, flotation is a process in which valuable minerals are separated from worthless material or other valuable minerals by inducing them to gather in and on the surface of a froth layer.

Introduction to Mineral ProcessingChevron Phillips Chemical

Froth flotation is considered to be the most widely used method for ore beneficiation. In ore beneficiation, flotation is a process in which valuable minerals are separated from worthless material or other valuable minerals by inducing them to gather in and on the surface of a froth layer.

How to Extract Precious Metals From SulfidesSciencing

The most popular method of separation is the froth floatation method, which was specifically designed for sulfides as opposed to smelting which is more suitable for larger veins of metal ore. Another more modern method uses microorganisms to separate the metals from the sulfur.

What is a process used to separate mineral ores from

A process of melting and decomposing ores to separate the metals they contain.Hence this method is suitable for the concentration of the sulphide orefroth floatation process, magnetic

1 Froth FlotationFundamental Principles

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.

Froth Flotation MethodJXSC Machine

Dec 20, 2018· This froth flotation method is used to treat quartz sulfide ores or goldsilverbearing pyrite and pyrrhotite containing gold telluride, pyrrhotite, chalcopyrite and other sulfide minerals. The floatable gold telluride in the ores is first produced as a concentrate, and then roasted and cyanided to expose gold and silver ores in sulfides and tellurides.

How to Extract Precious Metals From SulfidesSciencing

The most popular method of separation is the froth floatation method, which was specifically designed for sulfides as opposed to smelting which is more suitable for larger veins of metal ore. Another more modern method uses microorganisms to separate the metals from the sulfur.

extraction of metalsintroduction

This page looks at the various factors which influence the choice of method for extracting metals from their ores, including reduction by carbon, reduction by a reactive metal like sodium or magnesium, and by electrolysis. Details for the extraction of aluminium, copper, iron and titanium are

Concentration of OreseMedicalPrep

Froth floatation process. This method is used to separate gangue from the sulphide ores. This process is used for sulfide ores of Cu, Pb and Zn. Suspension of powdered ore is prepared using water. To this suspension, collectors and froth stabilizers are added.

How do we separate two sulphide ores by Froth Floatation

Sulphide ores of metals are usually concentrated by froth floatation process. asked Dec 24, 2018 in Chemistry by sonuk44.3k points processes of isolation of elements

Froth flotationWikipedia

Froth flotation is a process for selectively separating hydrophobic materials from hydrophilic. This is used in mineral processing, paper recycling and wastewater treatment industries. Historically this was first used in the mining industry, where it was one of the great enabling technologies of the 20th century.

Copper Mining and Processing: Processing of Copper Ores

The slurry is placed in a tank and a process called froth floatation is used to separate the copper minerals from the gangue. Chemical reagents called collectors are added to the slurry and bind to the copper particles, making them hydrophobic, or waterproof.

Concentration of Ores: Hydraulic Washing, Froth Flotation

Another method of concentration of ores is the Froth Flotation Method. This is the process for concentration of primarily sulphide ores. It has the advantage over gravity separation because it can collect even the extremely fine particles of minerals. The process uses the difference in the wetting characteristics of minerals and gangue.

1 Froth FlotationFundamental Principles

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.

How to Extract Precious Metals From SulfidesSciencing

The most popular method of separation is the froth floatation method, which was specifically designed for sulfides as opposed to smelting which is more suitable for larger veins of metal ore. Another more modern method uses microorganisms to separate the metals from the sulfur.

Which one of the following ores is best concentrated by

The role of depressant in froth floatation process is to prevent certain type of materials from forming the froth with bubbles. 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.

CBSE Class 12 Chemistry Notes : Principal and Processes of

Apr 22, 2019· This method is commonly used for oxide ores such as haematite, tin stone and native orcs of Au, Ag, etc. Froth Floatation. This method is used for the concentration of sulphide ores. This method is based on the preferential wetting of ore particles by oil and that of gangue by water ..

Trick to learn froth flotation process / Metallurgy tricks

Jul 31, 2018· In this video I discussed Trick to learn froth flotation processMetallurgy tricks. Skip navigationExtraction of Metals IDuration:Froth floatation methodDuration:

What is Concentration of Ore? Definition and Methods

The physical methods include traditional hand picking, hydraulic washing, magnetic separation, froth floatation for the concentration of ore. Hand picking. It was the traditional method of concentrating ore directly with hands. In this method, the gangue or adhering solid matrix is separated from the ore with the help of a hammer.

Name the substance used as depressant in the separation of

It is done for PbS ores. Depressants help to separate two sulphide ores by selective prevention of froth formation by one ore and allowing the other to come into the froth. NaCN is used as a depressant in order to separate two sulphide ores ZnS and PbS.

Froth Floatation ProcessYouTube

May 05, 2010· Froth Floatation Process Froth flotation is a process for selectively separating hydrophobic materials from hydrophilic. This is used in several processing industries.

Flotationore dressingBritannica

The flotation process was developed on a commercial scale early in the 20th century to Flotation, in mineral processing, method used to separate and concentrate ores by altering their surfaces to a hydrophobic or hydrophilic conditionthat is, the surfaces are either repelled or attracted by water.