Method for the treatment of phosphogypsum

Details Method for the treatment of phosphogypsum Method for the treatment of phosphogypsum

1973-09-25

1976-04-20

Douglas, Winston A.

Compositions: coating or plastic

Coating or plastic compositions

Proteinaceous material containing

423166, 423167, 423555, C04B 1100

Patent

active

039516750

ABSTRACT:
The purification of the raw phosphogypsum issued from the fabrication of phosphoric acid by reaction between phosphate rock and sulphuric acid consists of removing the extreme grain size fractions therefrom.
This method has been developed after it has been found that a large part of the undesirable impurities are concentrated in the extreme grain fractions which constitute only a small percentage of the phosphogypsum. The impurities thus removed are P.sub.2 O.sub.5, F, SiO.sub.2, C, F.sub.2 O.sub.3 and Al.sub.2 O.sub.3.
Purification efficiencies can be obtained of the order of 70 % for the total P.sub.2 O.sub.5 and fluorine, 60 % for silica, and 80 % for organic carbon, while water-soluble P.sub.2 O.sub.5 is substantially completely removed.

REFERENCES:
patent: 2340613 (1944-02-01), Perkins
patent: 2606127 (1952-08-01), Weber
patent: 3326633 (1967-06-01), Carothers et al.
Flotation, A. M. Gaudin, 2nd Edition, 1957, p. 522, McGraw Hill Book Co. .

Affiliated with

Also associated with

Rating

Method for the treatment of phosphogypsum does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for the treatment of phosphogypsum, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for the treatment of phosphogypsum will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1584419