Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Q. Explain about Froth flotation process?
Froth flotation process is the most important method for beneficiation of ores. This process has made possible the beneficiation of low grade ores which could not be processed earlier. The process of froth flotation is extensively employed to concentrate sulphide ores. Thus, many oxide ores may also be concentrated by this process. It is based on the difference in wet ability of different minerals. In this process, the ore is finely ground to give a thick pulp containing 30-40% solids. A small amount of pine oil, cresylic acid or oleic acid, which causes frothing, is added to the pulp. A substance, which is capable of repelling water from the surface of mineral and therefore promotes attachment of mineral particles to air bubbles, is also added to pulp. This substance is known as collector. Sodium ethyl xanthate, C2H5OCS2Na, is usually used as a collector in floating copper, lead and nickel sulphide ores. Another substance known as activator, which helps in the action of collector may also be added. The entire material, i.e. the mixture of pulp, collector and frother is taken in a container and hen air is blown. Air bubbles adhere to the mineral particles and make them float in the form of froth which is collected. The gangue is wetted by sinks and water.
Some ores have more than one mineral, so separation of one mineral from the other in addition to separation from the gangue is essential. To achieve this, a depressing agent or depressor, which suppresses the flotation of one of the minerals, is included. An important example is the concentration of lead-zinc ore. If the ore is concentrated without a depressor, both zinc and lead sulphides collect in the froth. If a small amount of zinc sup hate and sodium cyanide is added, zinc sulphide is depressed, permitting flotation of lead sulphide. After removing lead sulphide, copper sulphate is included to activate the depressed zinc sulphide and air is blown when zinc sulphide floats. This method is called as differential flotation.
# objective for the lesson plan
what is hypercongujative effect
Q. Derive an expression for the standard molar reaction entropy of a reaction that can be used to calculate its value from the thermodynamic equilibrium constant and its temperatur
explain the law of chemical combination
When 100 ml of M/10 H2SO4 is mixed with 500 ml of My/10 NaOH then nature of resulting solution and normality of excess reactant left is
Purpose
what is diagonal relationship in periodic table
Explain Resonance effects Resonance effects: The application of the resonance effect for predicting the relative rates of acid-catalyzed ester and amide hydrolyses is exactly
Ask question #The first-order rate constant for the decomposition of dimethyl ether is 3.2 ? 10 -4 s -1 at 450 o C. The reaction is carried in a constant volume flask. Initially on
Chemical Changes During the processing and storage of foods, several chemical changes occur that involve the internal food components and the external environmental factors. T
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd