Strengthening phosphate shale briquettes

Details Strengthening phosphate shale briquettes Strengthening phosphate shale briquettes

1980-02-19

1983-04-05

Derrington, James H.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

By mechanically introducing gas into material

264 63, C04B 3564

Patent

active

043791085

ABSTRACT:
The strength of phosphate shale agglomerates or briquettes is enhanced by adding to and mixing with crushed phosphate shale ore tempering water and a water-soluble alkali metal or ammonium phosphate. The water-soluble phosphate salt is preferably dissolved in the tempering water and the solution sprayed onto the crushed shale ore. The tempering water is added in an amount to bring the moisture content of the mixture between about 9 and 12%. The phosphate salt is added in an amount up to 0.1%. The mixture is compacted into desired size and the compacts calcined.

REFERENCES:
patent: Re26843 (1970-03-01), Ziegler et al.
patent: 1534828 (1925-04-01), Barr
patent: 2040081 (1936-05-01), Curtis
patent: 3032408 (1962-05-01), Baumann
patent: 3189433 (1965-06-01), Hollingsworth
patent: 3598754 (1971-08-01), Thummler et al.
patent: 3620972 (1971-11-01), Fite
patent: 3760048 (1973-09-01), Sullivan

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