Question

Smelting is done in:
A) Blast furnace.
B) Muffle furnace.
C) Open-hearth furnace.
D) Electric furnace

Answer 1

Hint: We realize that smelting is a cycle of applying warmth to metal to extricate a base metal. It is a type of extractive metallurgy. It is utilized to remove numerous metals from their minerals, including silver, iron, copper, and other base metals. Blast furnaces a kind of metallurgical heater utilized for purifying to create mechanical metals, for the most part pig iron, yet in addition others like lead or copper. Shoot alludes to the ignition air being "constrained" or provided above environmental pressure.

Complete answer:
We must have to remember that the smelting is a cycle of warming minerals of different metals, for example, copper look $C{u_2}S$ within the sight of oxygen (for oxidation) or coke (for decrease) at temperatures past the liquefying point of metals. It is done in a reverberatory heater. Hence option A is correct.
Smelting utilizes heat and a substance lessening specialist to break down the mineral, driving off different components as gases or slag and leaving the metal base behind. The lessening specialist is ordinarily a petroleum derivative wellspring of carbon, like coke—or, in prior occasions, charcoal. The oxygen in the metal predicaments to carbon at high temperatures because of the lower expected energy of the bonds in carbon dioxide. Purifying most unmistakably happens in a shoot heater to create pig iron, which is changed over into steel.

Note:
We have to know that in blast furnaces, fuel (coke), metals, and transition (limestone) are persistently provided through the highest point of the heater, while a hot impact of air (here and there with oxygen enhancement) is blown into the lower segment of the heater through a progression of lines called tuyeres, so the substance responses happen all through the heater as the material falls descending. The finished results are generally liquid metal and slag stages tapped from the base, and waste gases (pipe gas) leaving from the highest point of the heater. The descending progression of the mineral alongside the motion in contact with an up flow of hot, carbon monoxide-rich ignition gases is a countercurrent trade and compound response measure.