C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
39/34, 53/6
C22B 1/14 (2006.01) C22B 1/24 (2006.01) F27D 13/00 (2006.01)
Patent
CA 1216753
METHOD AND APPARATUS FOR CONTINUOUSLY MANUFACTURING NON-FIRED PELLETS ABSTRACT OF THE DISCLOSURE A method and an apparatus for continuously manufacturing non-fired pellets, which comprise: con- tinuously supplying green pellets containing a carbonating binder into a vertical type reactor to continuously pass the green pellets sequentially through a predrying zone, a carbonating zone and a drying zone in the vertical type reactor; blowing a predrying gas having a relative humidity of up to 70% and a temperature of from 40 to 250°C into the predrying zone to predry the green pellets therein until the water content of the green pellets in the pre- drying zone falls within the range of from 1 to 7 wt.%; blowing a carbonating gas comprising carbon dioxide gas of from 5 to 95 vol.% and saturated steam of from 5 to 95 vol.% and having a temperature of from 30 to 98°C into the carbonating zone to carbonate the carbonating binder contained in the green pellets therein; and blowing a drying gas at a temperature of from 100 to 300°C into the drying zone to harden the green pellets therein, thereby continuously manufacturing non-fired pellets.
447666
Miyashita Tsuneo
Nishio Hiroaki
Takeuchi Osamu
Yoshikoshi Hideyuki
Macrae & Co.
Nippon Kokan Kabushiki Kaisha
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