Method of classifying and comminuting a gypsum ore or the like
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United States of America Patent
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Aug 16, 1983
Issued Date -
N/A
app pub date -
Nov 24, 1980
filing date -
Jun 12, 1980
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method is disclosed for separating a relatively soft component from a relatively hard component of mineral ore and then comminuting the softer component. The separation is performed by impact crushing the ore to reduce the softer component to particulate material of a smaller dimension than that of the harder component after which the components are separated by screening. The comminution is performed by further impact crushing the softer component to further reduce same and separating sufficiently small particles. Relatively large particles are also removed and the remainder of the softer component is recycled through the comminution process. The method is primarily applicable to the separation of chert from gypsum and comminuting the gypsum in the processing of gypsum ore.
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