Lime enhanced pressure filtration of iron and steel making sludg

Details Lime enhanced pressure filtration of iron and steel making sludg Lime enhanced pressure filtration of iron and steel making sludg

1997-08-21

1999-12-28

Andrews, Melvyn

Specialized metallurgical processes, compositions for use therei

Processes

Consolidating metalliferous material by agglomerating,...

75961, 75962, C22B 1243

Patent

active

060076011

ABSTRACT:
A method is provided for improving the filtration rate of nonhazardous wastewater streams generated at a steel plant. The solids are concentrated in the wastewater stream. No more than about 5% by weight of lime is added to the concentrated wastewater stream which is then dewatered. A friable filter cake is produced by allowing the solids to harden. The lime addition results in a significant increase in the rate at which the stream may be filtered.

REFERENCES:
patent: 3959133 (1976-05-01), Fulton
patent: 5364441 (1994-11-01), Worner
patent: 5435835 (1995-07-01), Lynn et al.

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