초록 ▼

A method and an apparatus for finely crushing particles of material in a mill comprising feeding the material to be crushed to a first impact position, impacting and impelling the particles from the first impact position by a rotating impact surface stationary impact surface to a and accelerating th

A method and an apparatus for finely crushing particles of material in a mill comprising feeding the material to be crushed to a first impact position, impacting and impelling the particles from the first impact position by a rotating impact surface stationary impact surface to a and accelerating the particles in a vacuum to produce a sufficiently high impact energy at the first impact surfact to crush the particles fed thereto prior to the section impact surface. The particles to be comminuted are passed through a feeding tube or channel to a crushing chamber containing a rotor having its axle parallel to the feeding tube and having first impact surfaces thereon which are arranged to be parallel with the stationary impact surface, or surfaces, at the time they impact with the particles fed to the first impact position. The outlet of the feeding tube is located at the outer periphery of the rotor. Two or more circumferentially spaced feeding tubes may be provided and a recirculating system may also be provided to recirculate the particles after the stationary impact position back to an accelerator to be passed through the apparatus again.

대표청구항 ▼

A method for producing pulverized materials by comminuting particles of the material comprising: rotating at least one substantially vertical impact surface located at the peripheral end of a rotor in a closed path about an upstanding axis; repeatedly moving said at least one impact surface through

A method for producing pulverized materials by comminuting particles of the material comprising: rotating at least one substantially vertical impact surface located at the peripheral end of a rotor in a closed path about an upstanding axis; repeatedly moving said at least one impact surface through at least one impact position in said path at the peripheral end of said rotor; feeding the particles of material to be comminuted in an axial direction downwardly with respect to said rotor just opposite the peripheral end thereof to supply said at least one impact position with particles when said at least one vertical impact surface passes through said at least one impact position; evacuating and maintaining said path and said feeding and impact areas under a substantial vacuum; accelerating the particles in the vacuum during the feeding step downwardly towards said at least one impact position; impacting said accelerated particles in said at least one impact position with sufficient energy to crush them and produce fragments; projecting the fragments by the impact surface against stationary, vertical impact surfaces outside said path to produce further crushing; and leading the comminuted particles downwardly out of said path immediately after said further crushing on said stationary impact surfaces.