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.
If the value of azimuthal quantum number is 3, the possible values of magnetic quantum number would be: (1) 0, 1, 2, 3 (2) 0, - 1, - 2, - 3 (3) 0 ± 1± 2,± 3
Analysis show that nickel oxide has formulla ni .98 O 1.00 what fraction of the of nickel exist as ni+3 & Ni +2 Ans) ni+2=95.91 and ni+3=4.09
Illustrate how a high initial permeability in Fe-Ni alloys helps to reduce the area under hysteresis loop. The most favourably oriented fully-grown domain tends to rotate so a
how to balance chemical eqations
Question .. #
In the chemical reaction, Al(s) + CuCl2(aq) --> Cu(s) + AlCl3(aq), why did the Copper turn green after being left for a day?
You have 9.00 grams of H2O at 263.15 Kelvin at 1.00 Atm. How many moles of ice do you have
when will conductors conduct electricity?
Lattice energy of an ionic compound depends upon: (1) Charge on the ion only (2) Size of the ion only (3) Packing of ions only (4) Charge on the ion and size of the io
Q. Illustrate about nuclear particle? In 1932 Rutherford with Chadwick demonstrated the existence of the neutron a nuclear particle having no charge but with nearly the same
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: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd