Question

Which of the following reactions does not occur in Bessemer’s converter?
A. \[2C{{u}_{2}}S+5{{O}_{2}}\to 2CuS{{O}_{4}}+2CuO\]
B. \[2C{{u}_{2}}S+3{{O}_{2}}\to 2C{{u}_{2}}O+2S{{O}_{2}}\uparrow \]
C. \[2CuFe{{S}_{2}}+{{O}_{2}}\to C{{u}_{2}}S+2FeS+S{{O}_{2}}\]
D. \[FeO+Si{{O}_{2}}\to FeSi{{O}_{3}}\]

Answer 1

Hint: Before talking about the answer, you should know about Bessemer’s converter. It is a machine that is used for the extraction of copper. By looking at the reactions that are involved in this process of extraction of copper , we can figure out the correct answer .

Complete step by step answer:
The Bessemer’s process is the most inexpensive process used for the mass production of steel from pig iron. In this process, the impurities are removed from the iron with oxidation in air. This oxidation keeps the iron molten because it increases the temperature. Bessemer’s converter is defined as a machine which is used for the removal of impurities from pig iron which is used for the removal of impurities from pig iron which produces steel. Here, the Bessemer’s converter is also used for the extraction of copper and removes slag $FeSi{{O}_{3}}$. For the extraction of copper, many reactions take place in Bessemer converters. The sulphide ores of less electropositive metals are heated in the air to convert sulphide ore into oxides or sulphate. After that it reacts with the remaining sulphide ore and produces metal and sulphur dioxide.

$2C{{u}_{2}}S+3{{O}_{2}}\to 2CuO+2S{{O}_{2}}$

$C{{u}_{2}}S+2C{{u}_{2}}O\to 6Cu+S{{O}_{2}} $

And

$2C{{u}_{2}}S+5{{O}_{2}}\to 2CuS{{O}_{4}}+2CuO$

$2C{{u}_{2}}S+C{{u}_{2}}S{{O}_{4}}\to 4Cu+2S{{O}_{2}}$

And

$FeO+Si{{O}_{2}}\to FeSi{{O}_{3}}$

Therefore, the reaction that does not occur in Bessemer converter is option (C), that is, \[2CuFe{{S}_{2}}+{{O}_{2}}\to C{{u}_{2}}S+2FeS+S{{O}_{2}}\].

Additional information:
In the Bessemer’s converter, the sulphide ore of copper is heated in air till the part is converted into copper oxide. After that, the copper oxide is heated in the absence of air and this oxide reacts with unchanged sulphide. Self – reduction of $CuS$ to $Cu$ can be done on Bessemer’s converter.
In the Bessemerization process, the air is blown to molten copper that is kept in a Bessemer’s converter. The products that remain, for example $FeS$ , they get oxidized and removed in the process smelting. It gets oxidized into $FeSi{{O}_{3}}$ and removed as a slag.
In this process, $FeS$ is reacted in the air to give $FeO$ and $S{{O}_{2}}$. After that $FeSi{{O}_{3}}$ which is removed as a slag. Now, $C{{u}_{2}}S$ is roasted in air to give $C{{u}_{2}}O$ and $S{{O}_{2}}$ as a product. Now $C{{u}_{2}}O$ reacts with $C{{u}_{2}}S$ and it gives $Cu$ and $S{{O}_{2}}$ .

$FeS+{{O}_{2}}\to FeO+S{{O}_{2}}$

$FeO+Si{{O}_{2}}\to FeSi{{O}_{3}}$

$C{{u}_{2}}S+{{O}_{2}}\to C{{u}_{2}}O+S{{O}_{2}}$

$C{{u}_{2}}O+C{{u}_{2}}S\to Cu+S{{O}_{2}} $

Note: 1.Here, $FeSi{{O}_{3}}$ formed during the reaction of $FeO$ and $Si{{O}_{2}}$ is removed as a slag.
2.Here, hot air is blown inside that removes waste gas.
3.Bessemer converter is used to remove impurities.
4.For the production of copper, self reduction takes place.