MetallurgyHard

Question

An ore after levigation is found to have basic impurities. Which of the following can be used as flux during smelting ?

Options

A.H2SO4
B.CaCO3
C.SiO2
D.Both CaO and SiO2.

Solution

Acidic flux is used. It is an acidic oxide (oxide of a non-metal) like SiO2, P2O5, B2O3 (from borax). It is used to remove the basic impurity like CaO, FeO, MgO etc. The acidic flux combines with the basic impurity and forms a slag.

Create a free account to view solution

View Solution Free
Topic: Metallurgy·Practice all Metallurgy questions

More Metallurgy Questions

In which of the following pairs, both the minerals are oxides?...The metal which is obtained from both sea-water and ores from the earth′s solid crust is :...Chemical leaching is useful in the concentration of :...Which one of the following ores is best concentrated by froth - floatation method?...From the following statements regarding H2O2, choose the incorrect statement :...