Roller mill, aspirating assembly, and method for retrofitting a roller mill
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United States of America Patent
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Mar 16, 2021
Grant Date -
Jan 25, 2018
app pub date -
Feb 17, 2016
filing date -
Feb 23, 2015
priority date (Note) -
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status (Latency Note)
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Abstract
A roller mill (10) for grinding material, an aspirating assembly (23; 23′) and a method of retrofitting an existing roller mill. The roller mill (10) contains a grinding space (11, 11′) for grinding material, a separating wall (17) separates the grinding space from an aspiration space (21, 21′). At least one aspiration opening (13), is formed in the separating wall (17) through which aspiration air can flow due to a pressure difference between the aspiration space and the grinding space. The roller mill (10) has a closing element (14) for opening and closing the aspiration opening (13). The closing element (14) is in or moves into an opening position (O), which opens the aspiration opening (13), when the pressure difference exceeds a threshold value, and is in or moves into a closing position (S), which closes the aspiration opening (13), when the pressure difference falls bellow the threshold value.
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