RU2183991C2 - Centrifugal mill - Google Patents

Abstract

FIELD: equipment for fine and superfine grinding and activation of different materials. SUBSTANCE: centrifugal mill has platform, tubular milling chambers with charging and discharge throats. Tubular milling chambers are rigidly fixed on carriers movable in opposite directions and loosely connected with eccentric drive shaft necks oriented in opposite directions. Carriers are made in the form of platforms arranged at the same level for attachment of tubular milling chambers loosely connected at their one side to eccentric shaft necks oriented in opposite directions and at their other side to movable levers. Carrier platforms may be arranged in inclined or horizontal position. Carrier platforms may be positioned for changing distance between milling chambers positioned on each carrier, as well as for changing level of chambers. EFFECT: increased grinding and activating effect, provision for obtaining homogeneous fraction composition of product and simplified construction. 3 cl, 1 dwg

Description

 The invention relates to techniques for fine and ultrafine grinding and activation of various materials and can be used in chemical, metallurgical, construction, pharmaceutical, perfumery and other industries.

 Known centrifugal mills with tube grinding chambers, moving along a circular path around a certain axis that does not pass through the axis of the tube grinding chamber. As a result of this movement, the loaded material with grinding media acquires centrifugal forces, under the influence of which the crushed material is subjected to a complex of destructive loads: shock, abrasion, crushing and other loads by both grinding media and the walls of the grinding chamber.

 Such mills include a centrifugal mill containing a platform, a V-shaped frame in which a tube grinding chamber is spring-loaded. The V-shaped frame is freely connected with the eccentric necks of the drive shafts with counterweights at the ends (U.S. Pat. No. 1,586,851, class B 02 C 17/08, 1981).

 The main disadvantage of this mill is the difficulty of balancing eccentric drive shafts with counterweights and a V-shaped frame with a tube grinding chamber moving along a circular path. This embodiment of the mill worsens the dynamic characteristics, reduces the reliability and durability of the mill, and also makes it difficult to increase the productivity of the mill.

 The closest invention in technical essence is a centrifugal mill containing a platform, tube grinding chambers with loading and unloading necks, rigidly mounted on anti-motion carriers, freely connected to the anti-directional eccentric necks of the drive shaft.

 The disadvantage of this mill is the insufficient grinding efficiency, the inability to obtain a homogeneous fractional composition of the product, the complexity of the design, which complicates installation, balancing and maintenance, as well as insufficient productivity.

 The objective of the invention is to increase the efficiency of grinding and activation, obtaining a homogeneous fractional composition of the material, simplifying the design, leading to easier installation and maintenance of the mill, as well as increasing its productivity.

 This task is achieved by the fact that in a centrifugal mill containing a platform, pipe grinding chambers with loading and unloading necks, rigidly mounted on anti-movable carriers, freely connected with anti-directional eccentric necks of the drive shaft, the mill carriers are made in the form of single-level platforms for mounting grinding chambers and freely connected to the anti-directional eccentric necks of the drive shaft on the one hand, and on the other with movable levers.

 The carrier platforms for attaching pipe grinding chambers can be made horizontal or inclined.

 The platforms of the carrier can be made with the possibility of changing the distance and level between the grinding chambers located on each of the carriers.

 The drawing shows a cross section of a mill.

 The mill contains a platform 1, pipe grinding chambers 2 with loading and unloading necks, drove 3, a drive eccentric shaft 4 with anti-directional eccentric necks 5, movable levers 6, platforms drove.

 The mill operates as follows.

 The tube grinding chambers 2, rigidly fixed on the platforms 7 of the anti-movable carrier 3, under the action of rotation of the drive eccentric shaft move along the ellipse path due to the fact that the eccentric necks 5 move the carrier with grinding chambers in a horizontal plane along a circular path with a radius equal to the eccentricity eccentric neck 4, and in the vertical plane - with a large radius equal to the magnitude of the swing of the movable levers.

 With this movement of the grinding chambers 2, the centrifugal forces that cause complex breaking loads act on the material being crushed in the grinding chambers with grinding bodies. Moreover, the impact of these loads in each phase of movement is different, which increases the grinding efficiency. As grinding, the material moves relative to the walls of the grinding chamber, and at the same time, due to the backing of incoming fresh material, it is removed from the grinding chamber 2.

 This invention improves the efficiency of grinding, activation and obtaining a homogeneous fractional composition of the crushed product, provides increased mill productivity, safety and ease of maintenance.

Claims (3)

 1. A centrifugal mill containing a platform, pipe grinding chambers with loading and unloading necks, rigidly mounted on counter-carriers, freely connected to anti-directional eccentric necks of the drive shaft, characterized in that the mill drives are made in the form of single-level platforms for attaching grinding chambers and are freely connected with anti-directional eccentric necks of the drive shaft on the one hand, and on the other with movable levers.  2. A centrifugal mill according to claim 1, characterized in that the carrier platforms for attaching pipe grinding chambers are made horizontal or inclined.  3. A centrifugal mill according to claim 1, characterized in that the platforms of the carrier are made with the possibility of changing the distance and level between the grinding chambers located on each of the carriers.