RU1837999C - Arrangement for separating loose materials - Google Patents

Abstract

Usage: in the preparation or sizing of materials with abrasive properties, in mining and beneficiation plants, sinter plants, in i ox and blast furnaces and other areas of national economy. SUMMARY OF THE INVENTION: An apparatus for separating bulk materials comprises a loading device, a separation chamber 1. A cascade of bulk shelves is located therein. On the output side, the shelves are limited by sills. In front of them are nozzles 5 with discharge pipes 6. At the bottom of the chamber are receivers of the sifting products and a suction pipe. The intermediate overflow shelves 12 are equipped with auxiliary overflow shelves 13. They consist of an inclined plane of the overflow shelves and an additional overflow shelves. Overflow shelves have gable planes, equally inclined to the base, and a vertical dividing wall. It adjoins the planes along the line of their intersection. The ratio of the heights of the wall and the shelf is 0.3-0.5..1 zp f-ly, 3 ill. ) cl 1C with GJ XI

Description

The invention relates to the preparation (sorting) of materials having abrasive properties, and can be used in mining and processing plants, sinter plants, coke and blast furnaces and other fields of national economy.

In the proposed installation for the separation of bulk materials containing a loading device, a separation chamber with a cascade of movable filling devices with separation plates, thresholds and reflective plates mounted on them, nozzles with discharge pipes, a separation product receiver and a suction nozzle, the filling device is made of the main and parallel to it auxiliary shelves mounted with the possibility of both joint and the Tel'nykh of a horizontal movement, the auxiliary shelf is provided with an additional plate with a separation. a height / equal to 0.5 of the height of the separation plate of the main overflow shelf, with an additional threshold and located between the main shelf and the reflective plate installed in the loading part of the auxiliary shelf. The filling device is equipped with additional filling shelves connected to the main filling shelf, the upper ends and located symmetrically to the main relative to the vertical plane, while the separation plate is installed in the place of pre-fabrication of the main and additional filling shelves, and the ratio of the height of the separation plate to the projection of the filling shelf on the vertical plane was et 0.3-0.5.

The proposed installation for the separation of bulk materials with a given set of features (the form of the elements, the relative position and the relationship between the elements) ensures the achievement of a technical result consisting in improving the quality of the final product due to more efficient separation and subsequent removal of fine fractions (0-6 mm) , for example, when screening sinter, which leads to an increase in the productivity of the blast furnace and a decrease in the specific consumption of coke for the production of pig iron. In addition, the productivity of the apparatus for separating bulk materials is increased and the specific air flow rate is reduced, which reduces the power of the suction systems.

The implementation of the filling device from the main and parallel auxiliary shelves contributes to the allocation of shared shared

large material and their removal from the zone of further sieving, which will significantly reduce the screening of small fractions of the material large and reduce the load of the material on the supplied air stream.

The height of the additional dividing plate of the auxiliary shelf is equal to 0.5

5 guaranteed movement of particles of material between the main and additional shelves with a selected gap between the separation plates. The gap between the separation plates

0 of the main and auxiliary shelves is chosen equal to the triple value of the cross section of large pieces of the middle fraction of the material. With the ratio of the height of the separation plate of the auxiliary overflow shelf to the height. the separation plate of the main shelf more than 0.5 leads to the accumulation of material (jam) between the main and auxiliary shelves. With a ratio of heights

0 dividing plates of the auxiliary and main shelves of less than 0.5 can lead to the pouring of large particles of material to be removed from the sieving zone through the dividing plate of the auxiliary shelf.

The use of additional overfill shelves connected to the main overfill shelf, the upper ends and located symmetrically to the main relative to the vertical plane allows to stabilize the movement of particles of the removed material, removes from the zone of effective exposure to air flow, while improving dust deposition in

5 receiver and decreases its content in the removed air.

The ratio of the height of the separation plate to the projection of the overflow shelf on a vertical plane equal to 0.3-0.5,

0 provides a clear boundary for dividing the material into two fractions.

When the ratio of the heights of the separation plate to the projection of the transfer rack on the vertical plane is less than 0.3 floor 5, a lower separation plate is involved, which can lead to large pieces jumping over the separation plate and getting them into the mass of the fine charge. In addition, the size of the dividing plate of the main overflow shelf depends

measuring the dividing plate of the auxiliary shelf and decreasing the indicated ratio of the plate and shelf below 0.3 will reduce the height of the dividing plate of the auxiliary shelf, causing large particles of material to be removed from the zone of separation through the dividing plate.

When the ratio of the wall height to and more than 0.5 is obtained, an excessive height of the separating plate is obtained, which leads to the elongation of the dimensions of the installation and the destruction of the stability of movement of the particle flow of the material to be separated.

Using the mechanism of joint horizontal movement of the main rack and auxiliary shelves, it is possible to tune to the zeden size of the material. And the use of the mechanism of independent horizontal displacement of the main fill and support shelves will allow maintaining the gap between the main and auxiliary flaps equal to the triple value of the cross-section of large pieces of medium stock, with a change in the granulometric composition of the separated fraction.

Obtaining this technical result was achieved by solving the problem at an acquisition level. Thus, the implementation of the filling device from the main auxiliary shelf parallel to it, as well as the relative position between the elements of the filling device, the optimal cell size of the separation plate, and the selection of the ratio of the height of the separation plate to the projection of the filling shelf on the vertical plane. The proposed set of features for a person skilled in the art follows from the prior art. In FIG. 1 shows the proposed installation. general view, section; in FIG. 2 - loose-leaf fixture, cut; on g. 3 - the same, top view.

The installation consists of separation measure 1, in the upper part of which is located | but loading device (power or conveyor); receiving overflow p, lki 2; 3 filling devices with trolleys; unloading bulk silage 4; slotted nozzles 5 with injection tubes 6 and mechanisms for changing the angle of inclination of vertical and horizontal movement; receiving funnels of large 7. intermediate 8 and fine fraction 9; the suction nozzle 10 and the mechanism of movement 11 of the overfill handling device. The filling device 3 consists of the main 12 (Fig. 2) and auxiliary 13 shelves. The main shelf of the overfill device includes additional shelves 14 mounted 5 at an angle of 30 ° to the base, thresholds 15 on the output additional shelves, base 16, dividing plate 17. The auxiliary shelf 13 consists of an additional shelf 18, limited to

0 to the output side with an additional threshold 19, a separation plate 20, a reflection plate 21, and a movement mechanism 22 of the auxiliary shelf. For ease of positioning and adjustment

5 nozzles 5 auxiliary shelf 13 on the output side is divided into two bypass ki,

All sorted materials obtained cannot have an angle of repose below 28 °. Thus, the angle of inclination of the planes to the base of the shelf is assumed to be slightly less than the angle of repose of the sorted material to create a self-lining cushion.

Installation for the separation of materials works as follows.

The material to be separated is fed into. separation chamber 1 (Fig. 1)

0 by means of a feeder or conveyor, which ensures its uniform supply with a thin layer along the inclined surface of the receiving overflow shelf, and moves under the influence of its own weight. The separation of material into fractions occurs during the interaction of freely falling particles of material with a flat stream of air directed from the slot nozzle 5 of the first stage of separation of the installation. Large particles with a sufficient reserve of inertia, passing through a gas stream, almost do not change their trajectory of movement and fall on the auxiliary shelf 13 (Fig. 2) of the second stage.

5 Medium particles containing residues of coarse fraction, intermediate and a small amount of fine fraction, are sent between the separation plates 17 and 20 of the main and auxiliary shelves

0 and move along the additional shelf of the main shelf for the subsequent separation step, which is carried out in a similar manner. To order the particles of material dislodged from the general flow, it serves

5, a reflection plate 21 is located above the additional shelf in the loading portion of the auxiliary shelf. Small particles having a large relative cross-sectional area (area per unit mass) are exposed

the greatest impact of the air flow, change the trajectory and fall behind the dividing plate 17 of the main shelf. At the last stage of separation (Fig. 1), there is an interaction outside the material falling from the additional shelf of the main shelf of the second stage with a stream of air, and the final separation of materials into small and medium fractions is carried out. There are no large particles of material at this stage of separation, since they were separated at the two previous steps. The material of coarse fractions enters the inlet funnel 7, intermediate and small fractions - into the funnels 8 and 9, respectively.

Sorting air is supplied to nozzles 5 through flexible conduits b, and through the suction nozzle 10 together with dust for subsequent cleaning in cyclones. Coarse, medium, and fine separation is adjusted by moving the carts with the overflow shelves horizontally.

The proposed installation in mining and processing plants, sinter plants, in blast furnaces and is intended for the separation of bulk materials.

The proposed installation for the separation of bulk materials with a capacity of 200-300 t / h and an air flow rate of 35-50 m3 / t of material, installed, for example, for sorting chilled agglomerate, provides by reducing the content of substandard classes in the final product by 1-5% (0-5 mm) -production of agglomerate of high quality according to particle size distribution ..

Claims (2)

1. Installation for separating bulk materials, including a loading device, a separation chamber with a cascade of movable filling devices with separation plates, thresholds and reflection plates mounted above them, nozzles with discharge pipes, separation product receivers and a suction nozzle, characterized in that that, in order to increase the efficiency of separation of the material while expanding the range of fineness of the starting material, made from the main and parallel auxiliary shelves located with the possibility of both joint and independent horizontal movement, while the auxiliary shelf is made with an additional dividing plate with a height equal to 0.5 of the height of the dividing plate of the main overflow shelf, an additional threshold and is located between the main shelf and a reflective plate mounted in the loading part of the auxiliary shelf. 2. Installation according to claim 1, characterized in that it is equipped with additional overflow shelves connected to the main overflow shelf with upper ends and located symmetrically to the main shelves relative to the vertical plane, while the separation plates are installed at the junction of the main and additional overflow shelves, and the ratio of the height of the separation plate to the projection of the filling rack on the vertical plane was atP a-0.5. 12 .P Yu Figure 2 Cq