Electric arc furnace dust as raw material for brick

Details Electric arc furnace dust as raw material for brick Electric arc furnace dust as raw material for brick

1992-04-10

1994-01-11

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

Composed of waste material

501141, 1062868, 106400, 106401, 264 66, C04B 1804, C04B 3560, C04B 3566

Patent

active

052781119

ABSTRACT:
A process for producing brick involves calcining electric arc furnace dust and subsequently mixing the dust with a brick raw material prior to shaping the material into bricks and firing. The precalcination of the EAF dust greatly increases the bulk density of the dust and provides a brick having a much higher compressive strength when compared to bricks incorporating raw dust which has not been precalcined. Volatilized and recondensed heavy metals produced during the calcination process are collected and refined. As a result of the separation and collection of the volatilized heavy metals during the calcination process, substantially no heavy metals are volatilized during the brick firing process.

REFERENCES:
patent: 4047884 (1977-09-01), Heian
patent: 4130439 (1978-12-01), Gashenko et al.
patent: 4764216 (1988-08-01), Hooykaas
patent: 4911757 (1990-03-01), Lynn et al.

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