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US 4,056,230 AGranted
Method of crushing particles of material in a ball mill
AssigneeAlcan Research and Development Limited
InventorJacques L. E. Decobert
Life of this patent
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AssigneeAlcan Research and Development Limited
InventorJacques L. E. Decobert
Estimating the term…
A method of crushing particles of material in a ball mill comprises feeding a mixture of balls and a charge comprising the particles to be crushed, a solvent and a lubricant continuously through a ball mill which initially contains balls. The balls are recovered from the mixture issuing from the mill and are re-introduced into the mill with a fresh charge. One form of apparatus for carrying out the method comprises a cylindrical container disposed with its axis horizontal and rotatable about said axis. The inlet and outlet of the mill are arranged centrally at opposite ends of the container, and the outlet leads to an annular sieve which rotates with and is coaxial with the container. The sieve retains the balls for return to the inlet and allows the milled charge to fall into a receptacle. In an alternative form of the apparatus, the container has inlets at both ends and has an outlet with an associated sieve at its mid-length.
A continuous method of crushing metal particles in a ball-mill to produce metallic pigment, in which method:
A ball-mill comprising a horizontal cylindrical container which is adapted to be rotated about its own axis by means of a motor, which is provided with two feed openings formed respectively at the centres of the ends of the container and with at least one discharge opening formed at the periphery of the container, a fixed channel encircling the container where the peripheral opening or openings is or are located and having an outlet disposed below the container, the discharge openings being of such size as to afford passage to the balls and the charge following the crushing operation, and a sieve in the opening in the channel for separating the balls from the rest of the mixture, said ball-mill further comprising a washing means adapted to inject solvent into the sieve, and conveyor means for continuously returning the balls which are separated on the sieve, to the two feed openings.
Dependencies are inferred from the claim text.