SU537693A2 - Centrifugal vortex mill - Google Patents

Description

(54) CENTRIFUGAL-VORTEX MILL

one

The invention relates to the technique of grinding loose materials and can be used in the construction and other industries.

A centrifugal vortex mill is known, consisting of two coaxially arranged rotors ij.

However, this design has a low grinding efficiency.

The closest technical solution to the invention is a centrifugal-vortex mill for fine grinding of bulk materials, consisting of two coaxially located on vertical rotor axes, on which facing sides are concentrically located a series of shells forming annular working chambers 2.

However, this design has a weak air inflow directly into the working chambers of the mill, which reduces the efficiency of the material self-grinding process in turbulent swirling air flows, narrows the range of application of these structures in the field of grinding low-moisture materials that tend to stick together and aggregate due to strong sticking of the working chamber cavities .

The purpose of the invention is to intensify the grinding process.

This is achieved by the fact that the disks are enclosed in a casing, in the upper and lower parts of which windows are made for additional air leaks, and made with radio lattices, and additional shells can be installed on the outer circumference of the disks and on the casing and forming a gap between them.

FIG. 1 shows the proposed mill, a longitudinal section; in fig. 2 is a view along arrow A in FIG. 1 (bottom view of the upper rotor); in fig. 3 is a section along BB in FIG. 2 (air intake element.

Claims (2)

The centrifugal-vortex mill consists of two coaxially located on vertical axes x 1 and 2 and rotating in opposite directions of the upper 3 and lower 4 discs, on the opposite sides of which there are concentrically located a row of cylindrical shells 5 forming annular working chambers on the entire width of which is set by accelerating turbulizing the elements 6 in the form of plates fixed in such a way that the line of intersection of the plane of each element with the horizontal plane of the disk and the vertical surface of the shells of Forms angles greater than 2 to the direction of the vector of the circumference speed of the disk. The horizontal bases of the disks are made with radial slots, over which the air intake elements 7 are mounted in the form of plates inclined at an angle less to the direction of the vector of the circumferential speed of rotation of the disk. Windows 9 are provided in the housing 8 of the mill, and on the periphery of the outer sides of the rotors, shells 10 and 11 are fixed, forming a shutter with corresponding shells 12 and 13 fixed to the mill housing. On the periphery of the upper disc, blades 14 are installed according to the type of centrifugal fan. The discs are placed in the housing 8 with a tangentially located nozzle 15 for removing the dust-gas mixture. The mill operates as follows. The source material flows through the hollow trunnion of the upper rotor to the center of the mill. By the accelerating elements of the lower disk, the particles of the material are thrown upwards and fall into the oncoming air flows created by the air intake elements of the upper disk. Subsequently, larger particles of material, when moving from the center of the mill to the periphery, are ground mainly due to the impact of the layers of material deposited on the partition wall formed by concentrically arranged disk shells. Reaching the limiting value, the particles of the material are transferred to the suspended state, acquiring the speed and direction of air flow generated by the air intake elements of the upper and lower disks, and is intensively crushed. Air leaks directly in the cavity of the working chambers prevent their sticking, provide good cooling of the comminuted material and working bodies, and intensify the process of drying and transportation of the comminuted product. Air is drawn in through the windows 9 in the mill housing. In order to prevent the finished product from being carried away, shells 10 and 11 are fixed at the periphery of the outer sides of the disks through the air suction windows, forming a gap with corresponding shells 12 and 13 fixed to the mill housing. The ground material, together with air, is twisted by blades 14, fixed on the periphery of the upper rotor by a centrifugal fan and carried away through a tangentially located nozzle 15. Claim 1. The centrifugal-vortex mill by auth.t. No. 313557, characterized in that, in order to intensify the grinding process, the disks are enclosed in a casing, in the upper and lower parts of which there are windows for an additional suction of air, and made with radar gaps. 2. The mill according to claim 1, in this case, in order to exclude the removal of the finished product through the windows of the casing, on the outer circumference of the disks and on the casing, additional shells are inserted into each other and forming a mez “duh a gap. Sources of information taken into account in the examination: 1. USSR author's certificate number 163060, cl. In 02 of 7/06, 1962. 2. USSR author's certificate number 313557, cl. At 02 from 7/06, 1970. . Product Air IPU2.2