Treatment of steel mill waste for recycling

Details Treatment of steel mill waste for recycling Treatment of steel mill waste for recycling

1994-10-24

1995-08-08

Andrews, Melvyn

Specialized metallurgical processes, compositions for use therei

Processes

Consolidating metalliferous material by agglomerating,...

75961, 75962, 75319, C22B 1243

Patent

active

054395054

ABSTRACT:
Steel mill waste containing iron, iron oxides and polluting compounds are treated with a strong alkali to raise the Ph to 14 to allow more alkali to solubilize silica. The mixture of materials and silica gels is then reacted with alkaline silicic compounds and allowed to cure and form hard sedimentary rock-like materials, solidified into a non-polluting solid which can be recycled in a steel-making furnace to produce iron and non-polluting slag.

REFERENCES:
patent: 4119455 (1978-10-01), Cass et al.
patent: 4216012 (1980-08-01), Krofchak
patent: 4229295 (1980-10-01), Krofchak
patent: 4279635 (1981-07-01), Krofchak
patent: 4404105 (1983-09-01), Rysman de Lockerente et al.

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