SU1519770A1 - Tube mill - Google Patents

Abstract

The invention relates to pipe ball mills and can be used in the grinding of various materials in the building materials industry, mining, chemical and energy sectors of the industry. The purpose of the invention is to increase the efficiency of the grinding process by intramillary classification of the material being ground. The tube mill contains a drum 1 lined with conical classifying plates 2, an inter-chamber partition 3, an output grid 4. New in a tube mill is a classifier device made in the form of inclined shelves 5,6 and between them paired conical plates 7,8. The classifier is located at a distance of 0.5-1.5 times the diameter of the mill drum from the discharge grid 4. 3 sludge.

Description

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The invention relates to the technique of fine grinding, in particular to pipe little babies, and can be used both in cement industry when grinding clinker and additives, as well as in other sectors of the national economy - mining, chemical and energy industries.

The purpose of the invention is to increase the efficiency of the grinding process and ensure timely removal of particles of the finished product.

FIG. 1 is a diagram of a pipe mill with a classifier, a longitudinal section; on .. fig. 2 is a section A-A in FIG. one; in fig. 3 - classifying device.

The tube mill consists of a cylindrical1 of drum 1 lined with conical armored plates 2, an inter-chamber partition 3, an output grille 4. In the second chamber of the mill at a distance L (0.3-1.5) D, where D is the inside diameter of drum 1 from output grille 4; a classifying device is installed that includes alternating inclined shelves 5.6 and paired / conical plates 7 and 8 arranged to them. Inclined shelves 6 are attached to a perforated annular diaphragm 9. Inclined shelves 6 are attached to an annular diaphragm 10. Paired conical Sky plates 7 and 8 are interconnected by high end sides, as a result of which inclined surfaces 11 and 12 are formed, directed respectively towards shelves 5 and 6. Adjacent paired conical plates / and 8 are installed with a gap between them. The inclined plates 5 and b are located opposite the gaps between the paired conical plates 7.8 and alternate with each other.

The drum 1 of the mill is 35% by volume filled with the bodies with the bodies and the material to be ground (Fig. 2).

Pipe mill with a classification device operates as follows.

When the drum 1 (Fig. 1, 2) rotates in the direction v, the material being crushed moves through the mill in the direction S, the passage through the slots in the inter-chamber partition 3 enters the fine grinding chamber in the area of the classification device. At the same time through the mill at the same time

but the aspiration: suction is sucked at a speed of 0.4-0.7 m / s. About 95% of the particles of the finished product are in the loading area (grinding bodies and grinded material). The grinding bodies and the material are captured by the inclined shelves 5 and 6, rise above the total mass of the load (Fig. 2) to a great height, and are dropped vertically down onto the inclined surfaces 11 and 12 of the conical plates 7 and 8. When falling from top to bottom, the particles of the material being crushed equal to the particle size of the finished product, is removed from the mill drum through the slots of the exit grid 4 with aspiration air. The larger particles of the material to be ground are returned to the loading circuit, grindable and removed from the mill drum through the slots of the output grid 4.

The inclined surfaces 11 and 12 of the conical plates 7 and 8 distribute the falling milling of the body at the installation site of the classifier.

Shelves 5 and 6 are set at an angle about the longitudinal axis of the drum, i.e. tilted. The execution of the shelves 5 and 6 tilts provides for the longitudinal movement of the material to be captured by the shelves, respectively, in the K and N directions (Fig. 3). At the same time, the lifting height of the comminuted material is maximum and better conditions are created for classifying the particles of the comminuted material. If shelves 5 and 6 are mounted horizontally, i.e. in the process of work, the material is captured by the shelves b and 6, and, delayed by fir, gradually compresses — the shelves lose their function, the function of the elevator (lifting) element.

If the surfaces of 11.12 plates 7 and 8 are horizontal, then the load accumulates in the central part of the classifier. The effectiveness of grinding and classification is reduced. Inclined shelves 5 and 6 are installed in the gaps between the paired conical plates 7,8 and alternate with each other.

If the inclined shelves 5 and 6 are installed in each gap between the conical plates 7 and 8, i.e. twice as often then intense occurs

turbulence loading, which leads to a deeper grinding.

If the distance L is less than 0.5 millimeter drum diameter, the material particles are overpicked, the mill productivity is reduced,

If the distance L is greater than 1.5 times the mill drum diameter, the grinding becomes more rough, the quality of the finished product deteriorates.

A pipe mill with a grading device prevents agglome

5 5 10

sicking plates, perforated annular diaphragms, inter-chamber and discharge grids, grinding bodies, characterized in that, in order to increase the efficiency of the grinding process and ensure timely removal of particles of the finished product, in the mill drum at a distance of 0.5-1.5 of its diameter a grading device is mounted from the discharge grid consisting of two rows of inclined shelves directed towards each other, and a futar

The measurement of particles of the crushed material plates are located in the zone of the class and in general increases the efficiency of the device and are conjugated

between each other by large butt sides, with inclined shelves in opposite rows alternating between each other and located between the paired

grinding process.

Claims (1)

Invention Formula A tube mill containing a drum lined with conical klaskonpicheskie plates. staples. fLLZ.Z