Chemistry
Give the principles of:
(a) Hydrolytic method
(b) Froth floatation process
(c) Electromagnetic separation
Metallurgy
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Answer
(a) Hydrolytic method — The difference in the densities of the ore and the gangue is the main criterion.
(b) Froth floatation process — The process depends on the preferential wettability of the ore with oil (pine oil) and the gangue particles by water .
(c) Electromagnetic separation — Magnetic properties of the ores.
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Related Questions
Choose the correct option:
(a) The metal other than aluminum, which has a strong affinity for oxygen is:
(A) Copper
(B) Magnesium
(C) Silver
(D) Gold
(b) A metallic oxide which cannot be reduced by normal reducing agents:
(A) Zinc oxide
(B) Magnesium oxide
(C) Copper (II) oxide
(D) Iron (III) oxide
Name:
(a) the processes involved in (i) dressing of the ores (ii) refining of the ores.
(b) two metallic oxides which cannot be reduced by carbon, carbon monoxide or hydrogen.
(a) Name the methods by which concentrated ore is converted to metallic oxide
(b) State three objectives achieved during the roasting of ores.
(a) Define roasting. Name an ore on which roasting is done. Give balanced equation.
(b) Define calcination. Give an example and equation for calcination.