Method for recycle and use of contaminated soil and sludge

Details Method for recycle and use of contaminated soil and sludge Method for recycle and use of contaminated soil and sludge

1988-06-16

1990-05-01

Dixon, Jr., William R.

Compositions: coating or plastic

Coating or plastic compositions

Proteinaceous material containing

501155, 106103, 1062866, C04B 702

Patent

active

049215388

ABSTRACT:
Process for recycle and reuse of soil, sludge, sand, or rock containing: (a) at least about 16 wt % calcium oxide, about 5 wt % silica, about 1 wt % alumina, about 0.5 wt % Fe.sub.2 O.sub.3, or about 0.76 wt % magnesia; and (b) at least about 5 ppm arsenic, about 100 ppm barium, about 1 ppm cadmium, about 5 ppm chromium, about 5 ppm lead, about 0.2 ppm mercury, about 1 ppm selenium, or about 5 ppm silver. The process comprising mixing the soil, sludge, sand, or rock with an amount of inorganic constituents to form a raw material mix having a chemical composition suitable for the manufacture of Portland cement, charging the slurry to a cement kiln, heating the slurry in the kiln to a temperature sufficient to form a cement clinker, and removing the cement clinker from the rotary kiln.

REFERENCES:
patent: 4022630 (1977-05-01), Watson et al.
patent: 4256503 (1981-03-01), Tsuda et al.
patent: 4640681 (1987-02-01), Steinbiss et al.
patent: 4678514 (1987-07-01), Deyhle et al.

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