Explain about gravity separation, Chemistry

Assignment Help:

Q. Explain about Gravity Separation?

This is one of the simplest processes of concentration of ores. It is based on the difference in the specific gravities of the gangue and ore. In this process, the crushed ore is kept on top of a sloping table, which is prepared to vibrate. A stream of water is goes in the direction perpendicular to the slope. The lighter particles are thrown up by vibration and are replaced by the water stream. The heavier mineral particles settle to the base and are collected. This process of gravity separation is called as tabling. Casseterite or tin-stone, pitchblende and chromite are concentrated by this method.

A modification of the above process is sinking and float method. In this the powdered ore is suspended in a liquid whose specific gravity is intermediate between the ore and the densities of gangue. The lighter material floats and the heavier material sinks. In this process, the difficulty is in finding a liquid of the proper specific gravity. A solution of calcium chloride in after is usually used. Suspensions of sand in water giving liquids of specific gravities up to 3.2 are also used. Thus, due to technical problems this process is rarely used in concentration of low grade ores, but it is widely used in cleaning coal.


Related Discussions:- Explain about gravity separation

Organic, nitration of give amines give ortho para and not meta isomer?

nitration of give amines give ortho para and not meta isomer?

Expression of concentration of a solution, How much NaCl is needed to prepa...

How much NaCl is needed to prepare a 0.5 solution of 5 Ltires?

Transition elements, Why transition elements form interstitial compound

Why transition elements form interstitial compound

oxides and oxyacids of sulphur and nitrogen, Environmental pollution cause...

Environmental pollution caused by oxides and oxyacids f nitrogen and sulphur

Derive gibbs duhem equation, (a) Derive a relationship between the elevatio...

(a) Derive a relationship between the elevation in boiling point of a solution and the mole fraction of the solute from the thermodynamic consideration. (b) The molal elevatio

Matter, Q.give characterstics of matter?

Q.give characterstics of matter?

The band model, The band model of solids is an extended of the molecular or...

The band model of solids is an extended of the molecular orbital (MO) method. The overlap of atomic orbitals in an extended solid produces rise to continuous bands of electronic en

Chemical equilibria, what do you know about the dynamic nature of chemical ...

what do you know about the dynamic nature of chemical equilibrium?

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

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!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd