what do you mean by flux ? what are different kinds of flux with examples

CBSE Class 12-science Answered

what do you mean by flux ? what are different kinds of flux with examples

Asked by niharikapabba2605 | 07 Aug, 2018, 11:21: AM

Expert Answer

Flux:

It is the substance added to molten metals to bond with impurities that can be readily removed.

Types of flux:

Fluxes are of two types, viz, acidic flux and basic flux.

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

(b) Basic flux: It is a basic oxide (i.e. oxide of a metal) like CaO (obtained from limestone, CaCO₃), MgO (from magnesite. MgCO₃), haematite (Fe₂O₃) etc. It is used to remove acidic impurities like SiO₂, P₂O₅ etc. The basic flux combines with an acidic impurity to form a slag.

Thus, slag can be defined as a fusible mass, which is obtained when a flux reacts with an infusible, acidic or basic impurity present in the oxide ore.

Answered by Ramandeep | 07 Aug, 2018, 02:53: PM