Duplex process of steel making is a combination of

Duplex process of steel making is a combination of
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Duplex process of steel making is a combination of

A. basic bessemer and acid open hearth processes

B. acid bessemer and basic open hearth processes

C. acid bessemer and acid open hearth processes

D. basic bessemer and basic open hearth processes 

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Right Answer is: B

SOLUTION

Explanation:

There are two types of processes used for making stainless steel:

1. Triplex process:

  • It consists of three main production facilities, namely, the acid Bessemer converter, basic open-hearth furnace and acid open-hearth furnace.
  • This process could meet the demand for acid steel with extraordinary success.
  • But as the demand for this acid steels decreases, this process is abandoned in 1951 and a new process which is known as the duplex process is used for steel making.

2. Duplex process:

  • It consists of blowing hot metal and scrap in acid Bessemer conveners and subsequently refining them in the basic open-hearth furnace.
  • The point of modification was to use scrap along with the hot metal.
  • The major advantage of this process is to shorten the production time by the use of acid Bessemer converter and to increase productivity by dephosphorisation at the basic open-hearth furnace.

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