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PROCEDURE FOR GRINDING HEAT SENSITIVE TOPICS
PROCEDURE FOR GRINDING HEAT SENSITIVE TOPICS
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机译:磨削热敏主题的过程
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摘要
A method for comminuting heat-sensitive feedstock, particularly thermoplastics, rubber, caoutchouc, and elastomers, to a particle size of less than 500 μm, preferably less than 425 μm. Process steps are provided to achieve an economic material processing without the use of cryogenic comminution. First, a precomminution of the feedstock to a size smaller than 4 mm is performed in a rotating comminuting device through which a first process gas PG1 flows. Then, a fine grinding is performed of the precomminuted feedstock to a size smaller than 500 μm, preferably smaller than 425 μm, in a rotating fine grinding device through which a second process gas PG2 flows. Whereby the temperature of the precomminuted feedstock in the outlet of the fine grinding is regulated in a second control circuit by adding water to the precomminuted feedstock before and/or during and/or after the fine grinding.
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