RU2306179C2 - Material grinding apparatus - Google Patents

Abstract

FIELD: technique for fine and superfine grinding of materials.

SUBSTANCE: apparatus has casing with axial inlet opening, outlet opening and grinding chamber, and is further provided with two rotors axially aligned within said chamber and positioned for rotation in opposite directions. Rotors have circular rows of grinding members formed as blades with working side surface. Blades are positioned so as to define an angle of 95-105° between working side surface of blade and plane of rotation of respective rotor.

EFFECT: improved quality of grinding of material.

2 dwg

Description

FIELD OF TECHNOLOGY

The invention relates to the technology of fine and ultrafine grinding of materials and can be used in energy, chemical, construction, food, mining and other industries.

BACKGROUND

A device is known (patent WO 99/51352) for grinding materials, comprising a housing with an axial inlet, a radial outlet and a cylindrical grinding chamber, in which two horizontally arranged rotors are provided coaxially with the possibility of counter rotation, provided with annular rows of grinding elements having a flat frontal surface oriented at an angle to the radial direction of the grinding chamber. Between the grinding elements pass channels with a cross section having a closed loop, tapering from the center to the periphery. The device according to patent WO 99/51352 adopted as a prototype.

SUMMARY OF THE INVENTION

This invention solves the problem of expanding the arsenal of technical means that provide fine and ultrafine grinding of the material.

The technical result consists in the implementation of this purpose.

Salient features:

- restrictive:

a housing with an axial inlet, an outlet and a grinding chamber, two coaxial rotors with the possibility of counter rotation, annular rows of grinding elements;

- distinctive:

grinding elements of rotors in the form of blades with a working lateral surface, the blades are installed in such a way that an angle of 95-105 ° is formed between the working lateral surface of the blade and the plane of rotation of the corresponding rotor.

BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 presents a section along the axis of the device for grinding materials.

Figure 2 presents the cross section of the rotor by grinding elements.

DETAILED DESCRIPTION OF THE INVENTION

The device for grinding materials contains a housing 1 with an axial inlet 2 and an outlet (not shown), a grinding chamber 3, coaxial rotors 4 and 5, counter-rotating relative to the vertical axis, with annular rows of grinding elements 6, 7, 8, and 9 mounted on them.

The grinding elements 6, 7, 8 and 9 are made in the form of blades with a working side surface 10 mounted on the rotors so that between the working side surface 10 of the blades 6, 7, 8, 9 and the plane of rotation 11 of the corresponding rotor, an angle 12 equal to 95-105 °, i.e. the blades are installed with the so-called "bulk" in the direction of rotation of the rotor.

During operation, the supply of crushed material is carried out through the inlet 2 of the housing 1.

Alternating collision of the material with grinding elements 6, 7, 8 and 9, installed in circular rows on counter-rotating rotors 4 and 5 with a "bulk" in the direction of their rotation relative to the vertical axis, provides a high degree of use of kinetic energy for its grinding due to the fact that This installation of blades on the rotor ensures the creation of the axial component of the flow rate of the crushed material, which favorably affects the degree of mixing and leads to an increase in the fineness of grinding material .

Claims (1)

A device for grinding materials, comprising a housing with an axial inlet, an outlet and a grinding chamber, in which two rotors equipped with annular rows of grinding elements are coaxially mounted for rotation, characterized in that the grinding elements of the rotors are made in the form of blades with a working side surface installed in such a way that between the working lateral surface of the blade and the plane of rotation of the corresponding rotor an angle of 95 ÷ 105 ° is formed.

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