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Conductance of Electrolytic Solutions

A substance t...

Question

A substance that is added to the charge in a furnace to remove gangue particles is termed as __.

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Solution

A substance that is added to the charge in a furnace to remove gangue particles is termed as flux. It is the substance added to the ore to reduce the fusion temperature and to remove impurities. E.g. Calcium oxide, silica, etc.

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In the manufacture of iron, limestone is added in the blast furnace to form
A,,gangue
B,,slag
C,,calcium metal
D,,calcium carbonate

Q. The equations of the production of iron in the blast furnace are given. Answer the following questions.

C + O_{2} \to C O_{2}

C O_{2} + C \to 2 C O

C a C O_{3} \to C a O + C O_{2}

C a O + S i O_{2} \to C a S i O_{3}

F e_{2} O_{3} + 3 C O \to 2 F e + 3 C O_{2}

Which is the main impurity found in haematite ? Which substances is used to remove the gangue ?

Q. In froth flotation process, pine oil is usually added to the gangue particles in the ore.

Q. Crude calcium carbide,

C a C_{2}

, is made in an electric furnace by the reaction,

C a O + 3 C \to C a C_{2} + C O

The product contains 64%

C a C_{2}

and 36% unreacted

C a O

.
(Given that molecular weight of Ca = 40, C =12, O = 16)

Q. Consider the following statements
Coke is one of the materials of the charge added to blast furnace for the production of steel/iron. Its function is to
(a) act as the reducing agent
(b) remove silica associated with the iron ore
(c) function as fuel, to supply heat
(d) act as an oxidizing agent Of these statements

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