Method for manufacturing cold bonded pellets

Details Method for manufacturing cold bonded pellets Method for manufacturing cold bonded pellets

1990-06-11

1991-11-19

Andrews, Melvyn J.

Specialized metallurgical processes, compositions for use therei

Processes

Consolidating metalliferous material by agglomerating,...

75468, 75773, C22B 1243

Patent

active

050663275

ABSTRACT:
A method for manufacturing cold bonded pellets comprises the steps of mixing fine iron ore with binder and pelletizing the mixture of the fine iron ore and the binder to manufacture green pellets, charging the green pellets into a travelling grate, a layer of the green pellets which has a predetermined height being formed on the travelling grate, blowing gas containing carbon dioxide into the layer of the green pellets on the travelling grate, the green pellets being cured by the gas containing carbon dioxide, and the gas having passed through the layer of the green pelllets being discharged, and drying the curen green pellets. The gas containing carbon dioxide has a concentration of 55 vol. % carbon dioxide or more. The gas containing carbon dioxide has a concentration of 20 vol. % nitrogen or less. The gas containing carbon dioxide is blown into the green pellets layer at a flow rate of 0.1 to 1.0 Nm.sup.3 /sec. for 1 m.sup.2 of the area of the grate, Nm.sup.3 being the volume of the gas in a normal condition.

REFERENCES:
patent: 3617254 (1971-11-01), Imperato et al.

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