DEVICE FOR SEPARATION OF HARD LOOSE MATERIALS BY DRY METHOD Russian patent published in 2002 - IPC

FIELD: technology of separation of hard loose materials by dry method, mainly, broken sheet glass; applicable in technology of grinding of materials in hammer crushers for production of powders of definite granulometric composition. SUBSTANCE: device includes located along symmetry longitudinal axis a flow shaper in the form of trough installed at an angle to horizon ensuring material sliding over its surface and conveyor belt conjugated with trough and installed for hoisting. Trough working surface is formed of central and side parts. Central part is triangular in shape and located with its base facing container unloading hatch with width B not less than that of unloading hatch and with vertex conjugated with straight section of conveyor belt. Angle α at triangle vertex is found from condition 20^°<α<80^°. Trough side parts are in the form of channels adjacent to triangle sides and convergent at triangle vertex and made with shelf downward increasing toward conveyor belt and with total width not exceeding the working zone conveyor belt, and angle β of rise of conveyor belt is found from relationship T°1

<β<T°2, where T₁ is an angle of friction of separated material with separated material; T₂ is an angle of friction of separated material with material of conveyor belt. Channel bottoms are inclined toward side of shelf face through an angle δ determined from relationship δ = arctg(tgα/2×tgβ) in this case, channel depth on side opposite to shelf is not smaller than shelf depth whose value is not less than 0.6 of maximum size of fraction. EFFECT: highly efficient and economical separation of flat loose materials, mainly, broken sheet glass, increased reliability of separation of lying bulk material. 4 dwg