Chemistry - Metallurgy Question with Solution | TestHub
Copper is the most nobel of the first row transition metals and occurs in small deposits in several countries. Ores of copper include chalcanthite , atacamite , cuprite , copper glance and malachite . However, of the world copper production comes from the ore chalcopyrite . The extraction of copper from chalcopyrite involves partial roasting, removal of iron and self-reduction.
Partial roasting of chalcopyrite does produce.
Options:
Answer:
Solution:
Partial roasting of chalcopyrite () involves heating it in a limited supply of air. This process converts some of the sulfide to oxide, but not all.
The main reactions during partial roasting are:
1. Oxidation of chalcopyrite:
2. Further oxidation of FeS:
In partial roasting, the goal is to convert iron sulfide to iron oxide (FeO) and some copper sulfide to copper oxide, but primarily to retain copper as . The can then be removed as slag in subsequent steps.
Therefore, the products of partial roasting are , , and .
The final answer is
