SU1565514A1 - Inclined intercompartment partition - Google Patents

Abstract

The inclined intercameral partition is made of a set of cylindrical rods laid in the same plane and forming gaps between them, located in the zone of contact of the partition with grinding bodies in the coarse grinding chamber, characterized in that, in order to reduce flow resistance and increase throughput, the rods arranged in a fan, with a narrow portion of the slots located in the zone of contact between the partition and the grinding bodies on the discharge side of the material.

Description

The invention relates to the field of fine grinding of various materials in ball drum mills, in particular to inclined inter-chamber partitions, and can be used both in the building materials industry in the production of cement and in mining in grinding ore, in coal energy in grinding, in chemical grinding of fertilizers and various raw materials.

Inclined intercameral partitions of ball drum mills are known, consisting of a set of rods laid in the same plane and forming gaps of equal width 1 between them.

The disadvantage of this technical solution is that the partitions have a large reverse spillage - from the fine grinding chamber to the rough grinding chamber, which generally reduces

the effectiveness of the material grinding process.

The inclined intercameral partition is also known, made of a set of cylindrical rods laid in the same plane and forming gaps between them, located in the zone of contact of the partition with the grinding bodies in the coarse grinding chamber 2.

The disadvantage of this partition is that it has high hydraulic resistance, which reduces its capacity.

The purpose of the invention is to reduce the hydraulic resistance and increase the throughput of the partition.

This goal is achieved by the fact that in a known inclined intercameral partition made of a set of cylindrical rods laid in one plane and forming gaps between them, located in the zone of contact of the partition with grinding

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cart in the camera coarse pomopp, rods races younger, m H epov. The narrow part of the gaps of the outcome of an outcome of a h. ash and contact ash is a septum with a small GG toga-Fr from the side of the material,

In figure 1, the installation diagram of the inclined hedgehog partitions; in fig. 2 - village A - Aa fgt. 1 (on the Kazakh. There are rods and globular cracks on the silenced partition); cha fchg. 3 node I in fig. 2 (width of the gaps between the rods in the coarse grinding chamber); FIG. 4 shows the IT node in FIG. 2 (the width of the slots in the contact of the interchange with the moving bodies of the criss-crp).

Naklop a mezhk, dsgorgorgka 1 ustanappvaegst in Oapablen 2 meleshshy and Dt; e o on vauepb i chamber 3 roughly broke f keior 4 tom-o of grinding. The camera 3 is coarsely molded and is loaded with milling-t-bm tel-osd 5, located on a pa level. Limited by line 6 in the position of the inclined intercamera neper (, 1)

The fine grinding chamber 4 is loaded with grinding ones: tamch 7, put the x-n-sh at the level bounded by line B. In the position of the partition, shown in FIG. L, the length of the coarse grinding increases; mellusants: ate 5 in the leu d, 7; a fire, limited by line 9; in chamber 3, the level of the melt of the bodies rises to position f limited by line 10.

The inclined partition 1 (figure 1) is assembled from rods 11 (figure 2) of cylindrical shape, which form wedge-shaped slots 12 between them. The contact area of the inclined chamber partition 1 (figure 1) with grinding bodies in the chamber 4 is finely ground by line 13 (FIG. 2), Position 14 (FIG. 2) shows the surface of the inclined inter-chamber partition in contact with the grinding bodies 5 of the fine grinding chamber 4 (FIG. 1), node I shows the width of the gaps between the rods in the contact zone of the inclined inter-chamber partition 1c. grinding bodies 5 in the chamber 3 rough mole (1). The node I shows the width of the slits 12 (figure 2) in the zone of contact of the inclined chambers 1 with the grinding bodies 7 in the chamber 4 fine grinding (figure 1).

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The mill with an inclined intercameral partition works as follows.

When rotating Btriban 2, the inclined chamber wall a 1 successively changes its position from that shown by a solid line to that shown by a dotted line, then returns to its original position. In this case, the chambers 3 and 4 periodically change from the maximum to the minimum value, which causes a change in the level of the grinding bodies in: A, respectively, from a minimum to a maximum. In the position of the partition 1, shown as a solid line, the length of the coarse grinding chamber 3 is minimal, the level of the minor bodies 5 is maximum in it ,, conditionally limited by line 6. In chamber 4 $, on the contrary, the length is maximum, the level of grinding bodies in it is minimal, conditionally limited by line 8 “In the position of the partition 1, shown by a dotted line, the length of chamber 3 is maximum, the level of grinding bodies in it is minimal, conditionally limited to line 9. In chamber 4, on the contrary, the length is minimum, the level of grinding bodies 7 is maximum, conditionally limited by line 10”

In the position of the inclined intercameral partition, shown in figure 1 by a solid line, the level of the grinding bodies and the material to be ground is higher in chamber 3 (line 6) than in chamber 4 (line 8). In the position of the inclined intercameral partition 1, shown by the dotted line, the level of the grinding bodies and material in the chamber 3 1, line 9) is lower than in chamber 4 (line 10),

During the rotation of the drum 2 of the mill, the partition 1 successively occupies the positions shown in Fig. 1 by solid and dashed lines. The surface 14 (figure 2, section A-A) facing the coarse grinding chamber 3, the partition 1 is in contact with the grinding bodies 5 in the chamber 3, Surface 15 facing the fine grinding chamber 4, the partition 1 is in contact with the grinding bodies 7 in the chamber 4. The intersection zone of the surfaces 14 and 15 of the contact l of both chambers of the mill when the level of the grinding bodies changes from the maximum (line 6 and 10) to the minimum (line 9 and

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8) levels (figure 1) is conventionally divided by line 13 (figure 2).

When the partition 1 moves from the position shown by a dotted line to the position shown by a solid line, the material from the coarse grinding chamber 3 passes through slots 12 (Fig. 2) located on the surface 14, having a maximum width (node i) in 4 fine grinding chamber. The transition from the position shown by the solid line to the position shown by the dotted line, the material from the fine grinding chamber through the slots 12 located on the surface 15 and having a minimum width b, (node II), partially returns to the chamber 3 for grinding, which in whole raises the fineness of grinding. However, the total area of the slots 12 located on the surface 14 of the partition considerably exceeds the area of the slots located on the surface 15. As a result, the return of material from chamber 4 into chamber 3 is not significant.

Since in the zone of contact of the partition 1 with the grinding bodies 7 in the chamber 4 (unlike the prototype) there are slots, its living section increases,

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hydraulic resistance is reduced. The aspiration mode of the grinding process is improved not only in the coarse grinding chamber 3, but also in the mill as a whole.

For example, in a laboratory installation of a pipe mill of 0.32 x 1.5 m, it is established that the living section of an inclined inter-chamber partition, the slits of which are made in accordance with the proposed technical solution, is 22% larger than the partitions, in which the slits are only made in the zone of its contact with the grinding bodies in the chamber 3 coarse. The hydraulic resistance of the mill from 340 Pa decreased to 230 Pa. The throughput capacity (capacity) of the partition increased from 64 to 76 kg / h with the fineness of cement grinding equal to 310 mA / kg.

The use of an inclined intercameral partition, the rods of which are located in a fan, reduces the hydraulic resistance of the mill, increases its productivity, improves the aspiration mode, prevents aggregation and sticking of the material to be ground.

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Editor V. Bugrenkova

Tehred M. Khodanich Proofreader V. Kabatsy

Order 1180 Circulation 505 Subscription

ZZNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, Raushsk nab. 4/5

Production and Publishing Combine Patent, Uzhgorod, st. Gagarin, 101

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Claims (1)

AN INCLINED INTERCHAMBER PARTITION made of a set of cylindrical rods laid in the same plane and forming gaps between themselves located in the contact zone of the partition with the grinding bodies! in the coarse grinding chamber, distinguishing me by the fact that, in order to reduce hydraulic resistance and increase throughput, the rods are located in a fan, with a narrow part of the slots located in the zone of contact of the partition with the grinding bodies on the discharge side of the material.