Compositions: coating or plastic – Coating or plastic compositions – Inorganic settable ingredient containing
Patent
1992-10-15
1993-11-09
Bell, Mark L.
Compositions: coating or plastic
Coating or plastic compositions
Inorganic settable ingredient containing
106751, 106752, 106762, C04B 736
Patent
active
052598764
ABSTRACT:
In a kiln plant for burning clinker from mineral raw materials, such as cement raw materials, and comprising a kiln (1), a precalciner (4), a preheater (6, 7, 8) and a flue gas filter (31), part of the kiln flue gases is diverted from the precalciner and the preheater via a bypass (20-30), the bypassed amount of flue gas being subjected to a preceding quenching in a chamber (21), humidified with water and cooled in a reactor (23), thereby causing the chlorides and alkalis in the bypassed gas to deposit upon dust particles which together with material dust in the gases are precipitated from the latter in a separator (25). The bypassed flue gas thus being almost purified of harmful compounds is then fed to the filter (31) or recirculated to the bypass in such manner that at least part of the precipitated compounds and material dust from the reactor (23) and the separator (25) is returned to the reactor for renewed treatment in same.
REFERENCES:
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patent: 3784389 (1974-01-01), Hastrup
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patent: 4576644 (1986-03-01), Goldmann
patent: 4695325 (1987-09-01), Enkegaard
patent: 4716027 (1987-12-01), Morrison
Bell Mark L.
Bonner C. M.
F. L. Smidth & Co. A/S
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