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US 4,398,956 AGranted
Process for treating moist compositions containing pollution-causing substances
AssigneePelt & Hooykaas B.V.
InventorCarel W. J. Hooykaas
Life of this patent
Estimating the term…
Abstract
A moist sludge as obtained from gases evolved during steel preparation in converters by blowing oxygen through said liquid steel is treated with 30% flue dust. Preferably the mixing is effected in two steps, in the first step 60% of the flue dust is added and the particles as obtained are mixed with the remaining flue dust in a second step without crushing the particles of the first step, particularly by using a whirling process.
Claims10
Process for treating a composition containing a moist metal or metal compounds comprising pollutioncausing compounds easily lixiviatable from said composition, comprising the steps of
- (a) mixing said composition with fly ash in such a quantity that small sphere-like particles are formed;
- and then
- (b) mixing said sphere-like particles in the presence of a further amount of said fly ash without crushing said particles.
Dependencies are inferred from the claim text.