Process for producing iron ore oxidized pellets from magnetite concentrate
First Claim
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1. A process for producing iron-ore oxidized pellets from magnetite concentrate, comprising the steps of:
- adding to said magnetite concentrate at least one calcium compound selected from the group consisting of slaked lime, quicklime, limestone and mixtures thereof, to basicity of 1 to 5;
granulating the resulting mixture;
drying the same;
preheating the granules thus prepared at a temperature of 1000°
to 1150°
C for 3 to 10 minutes; and
firing the thus preheated granules.
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Abstract
Iron-ore oxidized pellets are produced from magnetite concentrate by the addition to the magnetite concentrate of at least one calcium compound selected from the group consisting of slaked lime, quicklime and limestone, to a basicity of 1 to 5, granulating the mixture thus prepared, drying the same, preheating the same at a temperature of from 1000° to 1150°C for 3 to 10 minutes, and thereafter firing the same.
10 Citations
6 Claims
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1. A process for producing iron-ore oxidized pellets from magnetite concentrate, comprising the steps of:
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adding to said magnetite concentrate at least one calcium compound selected from the group consisting of slaked lime, quicklime, limestone and mixtures thereof, to basicity of 1 to 5; granulating the resulting mixture; drying the same; preheating the granules thus prepared at a temperature of 1000°
to 1150°
C for 3 to 10 minutes; andfiring the thus preheated granules. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification