RU2150323C1 - Centrifugal counter-impact grinder - Google Patents

Abstract

FIELD: disintegration and grinding of rocks. SUBSTANCE: grinder has cylindrical body with upper loading and lower unloading holes, working member on lower base, additional working member installed vertically and coaxially. Additional working member is made in the form of hollow upper rotor with stepped internal surface. Vertical wall of each step has baffle plates. Lower working member is stepped cone with radial ribs on each step. Steps of lower and upper rotors form working chamber. Working members have specified relative angular velocities of rotation. Baffle plates on internal surface of steps of upper working member are oriented square to direction of vector of pulse to lower working member. EFFECT: higher efficiency of grinding. 1 dwg

Description

 The invention relates to the field of disintegration and grinding of rocks and ores.

 Known centrifugal chopper counter strike, containing a cylindrical body with upper loading and lower discharge openings, a working body on the lower base [1].

 The main disadvantage of this crusher is the lack of effectiveness of one-sided impacts of disintegrable pieces of rock on the crusher body, which greatly limits their application.

 The objective of the invention is to increase the grinding efficiency.

 This task is achieved in that a centrifugal counter impact shredder containing a cylindrical body with upper loading and lower discharge openings, a working body on the lower base, is equipped with a vertically coaxially mounted additional working body, which is a hollow upper rotor, the inner surface of which is made in a stepped form, on the vertical wall of each stage has baffle plates, and the lower working body is a step cone, where at each stage radial gratings are laid, and the upper and lower working bodies are mounted coaxially due to the stepped form so that the levels of the edges of the steps in them approximately coincide and, due to the difference in the outer diameter of the lower rotor stage and the inner diameter of the upper rotor stage, form a working chamber, while between the working bodies a relatively angular speed of rotation is ensured, and the baffle plates on the upper surface of the steps of the upper working body are oriented normal to the direction of the pulse message vector it working body.

 The drawing shows a General view of a centrifugal chopper oncoming blow.

 The counter impact centrifugal shredder consists of a sealed cylindrical collapsible housing 1, the upper loading part of which is made in the form of a recessed hollow sleeve 2 along the axis with the hopper 3, with a fixed electric motor 4 on the upper surface so that the drive 5 is inside the housing. Unloading holes 6 are made on the bottom of the housing. The upper working member 7 is hollow and its upper part is pivotally mounted on the loading sleeve of the housing. The inner surface of the upper rotor is made in a stepped form, on the vertical circumferential wall of each stage, jack plates 8 are located at an angle. The upper working body rotates from the drive of the upper electric motor.

 The lower working body 9 is a stepped cone with accelerating ribs 10 at each stage and rotates opposite to the upper working body from an engine mounted axially on the lower part of the housing.

 The process of disintegration is as follows.

 The initial disintegrated rock is loaded into the receiving hopper 3 and enters the grinder through the loading sleeve of the housing 2 to the upper stage of the rotating lower working body 9, where the pieces of rock with the help of radially mounted accelerating ribs 10 acquire the maximum radial speed at the extreme point of the stage and, ejected from it, experiencing hard normal impacts of plug-in baffle plates 8 installed at a certain angle and fixed to the inner wall of the step of the opposite rotating upper work about body 7.

 Uncrushed pieces of rock bounce off and again receive blows from the ribs of the accelerating disk and return until they are crushed, and the crushed particles fall to the second stage of the accelerating disk due to the loss of momentum, from which they are fired and are hit by the bump plates of the corresponding upper stage working body.

 The process continues until the finally disintegrated rock is poured from the last stage of the lower working body and is not removed through the discharge openings 6 on the bottom of the body.

 The housing is sealed to prevent dust from escaping.

 The characterization of the disintegrated rock shows a high degree of disclosure of mineral associations without unnecessary re-slurry of the material. Therefore, the processed rock is a ready-made material for enrichment.

References
Bogdanov O.S. et al. Handbook of ore dressing - T. 1, M .: Nedra, 1972, p. 119-120.

Claims (1)

 A counter-impact centrifugal shredder containing a cylindrical body with upper loading and lower discharge openings, a working body on the lower base, characterized in that the grinder is equipped with a vertically coaxially mounted additional working body, which is a hollow upper rotor, the inner surface of which is made in a stepped form, on a vertical the walls of each stage are equipped with baffle plates, and the lower working body is a stepped cone, where at each stage there is a radial ribs are made, and the upper and lower working bodies, due to the stepped form, are mounted coaxially so that the levels of the edges of the steps in them approximately coincide and, due to the difference in the outer diameter of the lower rotor stage and the inner diameter of the upper rotor stage, form a working chamber, while between the working bodies a relatively angular speed of rotation is provided, and the baffle plates on the upper surface of the steps of the upper working body are oriented normal to the direction of the message vector of the lower pulse him to the working body.