IS 2411 : 1963 Methods of chemical analysis of fluorspar (fluorite)

1 Scope

1.1 This standard prescribes the methods for determination ofcalcium fluoride, calcium carbonate, silica, mixed oxides, barium,lead, zinc and sulphur in fluorspar of metallurgical and acidgrades within the following ranges:                                   METALLURGICAL   ACID GRADE                                     GRADE                                     Percent         Percent

Calciumfluoride                     Above 85        Above 97

Calcium as calciumcarbonate          6to 10         1 to 2Silica                               up to 5         Up to 1

Mixed oxides ( Fe₂O₃, Al₂O₃, etc)     1 to2          0.1 to 0.5

Barium assulphate                   Up to 0.2       -

Lead assulphide                     Up to 0.5       -

Zinc assulphide                     Up to 0.5       -Sulphur                              Up to 0.3       -

2 References

IS 264 : 1950Specification for Nitric Acid

IS 2246 : 1963Methods for Sampling Fluorspar (Fluorite)