Question

The insoluble impurities present in blister copper

are _______, , ,_____ and

_____ ​

Answer 1

Explanation:

For the extraction of copper from it's ore, the following processes takes place:

1) The ore is heated in a reverberatory furnace after mixing with silica. In the furnace, iron oxide slags of an iron silicate and copper is produced in the form of copper matte. This contains Cu

2

S and FeS.

2) Copper matte is then charged into silica lined convertor. Some silica is also added and hot air blast is blown to convert the remaining FeS, FeO, Cu

2

O/Cu

2

S to the metallic copper.

The following reactions take place:

2FeS+3O

2

→2FeO+2SO

2

FeO+SiO

2

→FeSiO

3

2Cu

2

S+3O

2

→2Cu

2

O+2SO

2

2Cu

2

O+Cu

2

S→6Cu+SO

2

The solidified copper obtained has blistered appearance due to the evolution of SO

2

and so, it is called blister copper.

According to the reactions, it has Cu

2

O impurities.