RU6524U1 - CENTRIFUGAL MILL - Google Patents

Abstract

A centrifugal mill containing vertically arranged tube grinding chambers divided by lattice baffles into sections filled with grinding bodies in the form of balls, characterized in that the grinding sections are made in the form of cone baskets with longitudinal slotted grooves in its walls.

Description

Centrifugal mill.

The utility model relates to centrifugal mills of fine and ultrafine grinding and activation of various materials and can be used in chemical, metallurgical, pharmaceutical, perfumery and other industries.

In modern technological processes for grinding various materials to obtain fine and ultrafine, activating solid inorganic substances and obtaining a homogeneous fractional composition, centrifugal mills with an inertial effect are increasingly used.Various designs of such mills can significantly increase the grinding intensity.

Known single chamber centrifugal mills of the German company Lurga, both with vertical HHivi, and with horizontal execution of the grinding chamber with separate drive of the grinding tube chamber and carrier, with a variable distance between the axes of the grinding chamber and carrier, In this mill the entire mass of material and grinding media loaded for grinding in the form of balls into a tubular grinding chamber, under the action of inertial and centrifugal forces they form from constantly moving particles of crushed material and grinding media both relative to each other and from ositelno walls grinding kkmery core which moves relative to the walls of the grinding-chamber-prototivopolozhnom direction in the center of mass offset from the rotation of the grinding chamber nucleus 90 degrees / team information, release 2.1 / 1inesterstva ferrous metallurgy, 1985., Art. 14,

The main disadvantages of these mills is that they have one degree of grinding chamber, which does not allow increasing the grinding intensity and obtaining a homogeneous fractional composition of the grinding material, especially when the grinding chamber is vertically executed, since part of the grinding material passing through the grinding chamber is not subjected to grinding, In addition, the design of the mill does not allow a sufficient degree of balancing during circular movements of the grinding chamber and the carrier, which significantly worsens the dynamics RP G mill characteristics, its reliability and durability.

M.KL.V02S 13/14

A centrifugal mill using an inertial effect with multi-tube sectional grinding chambers with grinding bodies in the form of balls, sections of which are formed by lattice walls installed both perpendicularly and inclined to the axis of the pipe grinding chamber, is known. At the same time, pipe grinding chambers rest on hollow, freely rotating eccentric axes and are freely connected to the opposed necks of the drive crankshafts / certificate for utility model of the Russian Federation No. 2351 dated July 16, 1996 /

The main disadvantage of this mill is that the material being crushed passes from section to section of the grinding chambers passively under the influence of its own weight. On the other hand, and on the other side, such a vystylivanie lattice partitions reduces the productivity of the mill.

The purpose of the utility model is: increasing mill productivity, grinding intensity and obtaining a homogeneous fractional composition.

This goal is achieved by the fact that in a well-known mill containing vertically arranged Rough sectional grinding ksh.yury, sections of which are made in the form of conical baskets with longitudinal slotted grooves in its walls, filled with small bodies in the form of balls. This design of the mill allows to increase productivity and intensity grinding material due to the fact that the crushed material passes through the slotted grooves of the conical baskets under significant centrifugal forces w to the subsequent section of the pipe grinding chamber, which contributes to the accelerated passage of the crushed material, thereby increasing mill productivity. In addition, in each conical goat, the crushed material is subjected to double exposure to grinding elements by constantly moving them both on the internal and current surfaces of the walls of the conical baskets, thereby increasing the grinding intensity, for due to the intense impact on the crushed material by shock, abrading, vortex and other loads. In addition, when the crushed material passes through the slits e poses of cone baskets, it is subjected to the additional action of grinding bodies of subsequent sections, which under the action of centrifugal forces rise upward along the outer surfaces of the walls of the cone baskets by squeezing the crushed material from the formed - enclosed space, thereby facilitating more rapid passage along the intensive grinding ground material from section to section of tube grinding chambers. water 10, the loading hopper 11, the discharge pipe 1Sh 12, Balbera 13, the Mill operates as follows. The source material through the loading hopper 10 and the hollow eccentric axis 7 is fed into the initial section 3 of the pipe grinding chamber 2, which performs hfug movements on the hollow eccentric axes 7, from a connecting rod 9, connected to the drive crankshaft 8 of the drive gearbox 10, while the crushed material under the action of centrifugal forces is subjected to preliminary grinding by a balber 13 by rolling it along the walls of the cone s 4. Pre-crushed material under the action of centrifugal forces through slotted grooves 5 of the cone basket 4 enters the next stage 3 of the grinding chamber 2 and is subjected to intense exposure by the shell of destructive loads by small bodies 6, by the formation of particles of ground material and grinding bodies from constantly moving relative to each other 6 core, which under the action of inertial forces moves relative to the walls of the conical basket 4 with a lag of 90 degrees in the opposite direction of rotation of the walls of the grinding amers 2. After grinding to a certain fractional composition, the crushed material passing through the slotted grooves 5 of the conical basket 4 hits the next section 3 of grinding chamber 2, where the grinding process is repeated until finer grinding. Thus, the process of grinding and activation of the material takes place simultaneously in all sections of 3 grinding chambers 2, after which the crushed material through hollow eccentric axes 7, discharge pipes 12 are discharged from the mill. The number of sections 3 in the grinding chambers 2 is selected depending on the desired performance, properties of the crushed material and construction of the mill. A comparable analysis with the known technical solutions used in mill designs shows that the proposed technical solution of a centrifugal mill, where the tube grinding chamber is divided into sections made in the form of cone baskets with longitudinal slotted grooves in its walls, which allows to increase the productivity and intensity of grinding materials, due to the acceleration of the passage of the crushed material from section to section and a more intense impact on the crushed material with a complex of destructive effects loads generated by the centrifugal and inertial forces. Thus, a useful model of the design of a centrifugal mill is proposed, which allows to obtain a positive effect not achieved by known technical solutions used in known designs of mills. -5 Form

Claims (1)

A centrifugal mill containing vertically arranged tube grinding chambers divided by lattice baffles into sections filled with grinding bodies in the form of balls, characterized in that the grinding sections are made in the form of cone baskets with longitudinal slotted grooves in its walls.