METHOD FOR CRUSHING FRAGILE PIECES OF ROCK AND GYROABRASION CRUSHER FOR ITS IMPLEMENTATION (OPTIONS) Russian patent published in 2022 - IPC B02C2/08 

FIELD: ore crushing.

SUBSTANCE: inventions group relates to a method for crushing fragile pieces of rock and crushers for its implementation. The method consists in feeding the pieces into the grinding zone, crushing them by the direct impact on them of crushing and abrasive forces of the movable and stationary working surfaces, increasing as the height of the grinding zone decreases in the direction of movement of the crushed pieces to a given fraction size, with their exit through the sieving grid. Crushing of pieces of rock is carried out by rolling the crushed pieces along a fixed working surface by frictional action on them with a movable elastic corrugated working surface with additional abrasion of adjacent surfaces by friction of the rolling crushed pieces rubbing against each other to a given size. The crushing and abrasive forces of the movable and fixed working surfaces are set by the eccentricity of the rotation of the working surface relative to the lattice of the fixed working surface and its elasticity. The exit of the coarse fraction is carried out by pushing through the side window in the stationary working surface at the exit from the grinding zone, and the dust-like fraction formed during grinding through the grates of the fixed working surface in the grinding zone under the influence of centrifugal air flows created by the rotation of the moving working surface. The crusher according to the first version contains an electric motor 2 and a housing 3 fixed on the frame 1, consisting of a cylindrical horizontally located shell 4 with a fixed working surface and a grate 5 and two end walls 6 and 8, one of which is made with a loading window 7, and the other - with unloading 9, respectively. In this case, a drum with a disc is placed in the housing 3. The horizontal axis of rotation of the drum shaft 11 is parallel to the axis of the shell 4. On the outer side of the disk there is a rim with a tire on a movable working surface. The tire is made of an elastic material with a grooved tread on the working surface with the possibility of frictional transmission of rotary motion to the rolled shredded pieces under the influence of splitting and abrasive forces of elastic deformation caused by pressing the shredded pieces into the elastic tire in the grinding zone during eccentric rotation of the drum. The crusher according to the second version additionally contains a horizontally mounted vane rotor 27 with the width of the blades 28 corresponding to the length of the shell 4 and with the orientation of the working surfaces in the direction of rotation of the blades 28. In this case, the wall of the body 3 opposite to the loading window is removable. The vane rotor 27 is installed in the housing 3 in an eccentrically cylindrical shell 4. The shell 4 in the grinding zone is made with a grate 5 separating the crushed pieces into fractions.

EFFECT: crushers are characterized by an increase in manufacturability.

8 cl, 4 dwg