| 摘要 |
The present invention concerns improvements in hammer mills, secondary and tertiary, reversing and not, that allow to resolve problems tied to the shattering of the inert hammers. Through the use of a special device circular of rotation, endowed with blades of interception in equal number to that of the hammers that launches the inert material against the front of the hammers, obtaining the shattering totally to impact, in place of the traditional shattering for crushing between hammers and armours. The surprising resulted obtained include an increase of production from about double to about triple, with an almost complete absence of recycle portions; good polyhedric nature and granulometry, with a drop of about 70% of dust in the obtained product; reduction of usury in the hammers and armour; possibility to produce thin sands, with non attainable speed with traditional mills; an almost complete absence of dust freed during the operation with consequent elimination of environmental impact and guardianship of the health of the employees to jobs.
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