In the extraction of iron, hot air is introduced into the...
In the extraction of iron, hot air is introduced into the blast furnace through?
valves
open-hearths
arcs
tuyeres
Correct answer is D
Pre-heated air at about 600ºC is blown into the furnaces from the bottom through the tuyeres.
The periodic table is an arrangement of elements according to their? ...
Which of the following properties is NOT peculiar to matter? ...
What is the atomic number of Darmstadtium? ...
Which of the following substance is an ore of iron? ...
4.0 g of sodium hydroxide in 250 cm3 of solution contains?...