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Question
Hot air is blown from which side of a rotary kiln at 1873 K to manufacture cement?
Hot air is blown from which side of a rotary kiln at 1873 K to manufacture cement?
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Solution
The correct option is A Lower
The rotary kiln consists of a tube made from steel plate,
and lined with firebrick. The tube slopes slightly (1–4°) and slowly rotates on
its axis at between 30 and 250 revolutions per hour. Rawmix is fed in at the
upper end, and the rotation of the kiln causes it gradually to move downhill to
the other end of the kiln. At the other end fuel, in the form of gas, oil, or
pulverized solid fuel, is blown in through the "burner pipe", producing
a large concentric flame in the lower part of the kiln tube.
The rotary kiln consists of a tube made from steel plate, and lined with firebrick. The tube slopes slightly (1–4°) and slowly rotates on its axis at between 30 and 250 revolutions per hour. Rawmix is fed in at the upper end, and the rotation of the kiln causes it gradually to move downhill to the other end of the kiln. At the other end fuel, in the form of gas, oil, or pulverized solid fuel, is blown in through the "burner pipe", producing a large concentric flame in the lower part of the kiln tube.
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