SU1301804A1 - Arrangement for granulating slag melt - Google Patents

Abstract

The invention relates to metallurgical production and can be used for the granulation of slag melts in ferrous and non-ferrous metallurgy. The goal is to increase the reliability of work, improve the cleaning of the gransack carts without stopping the process, expand the possibilities of controlling the process of granulation, and also use slag heat to heat the air. A plant for the slag melt granulation contains a device for melt supply, a jetting nozzle 3, drainage devices 16, pressurized SL Figure 1

Description

Bath box 4, camera 1, built into the box with the formation of pockets between the side walls of the box and the chamber. The bottom of the latter is made in the form of a partitioned duct 12 with air-feeding devices 13 blocked by a perforated grille 9. The side walls of the chamber 1 are made perforated in its middle part. Drainage devices 16 are connected to pockets, and jetting equipment 1

The invention relates to metallurgy production and may be used for the granulation of slag asplates in ferrous and non-ferrous metallurgy.

The purpose of the invention is to improve the plant operation reliability, improve the cleaning of pockets of granulated slag without stopping the process, expanding the possibilities of controlling the granulation process, as well as using slag heat to heat the air,

Fig. 1 shows a plant for the granulation of a slag melt, a longitudinal section; Fig, 2 - section. A-A in FIG.

The installation contains a camera 1, a ppodorak tray 2, a jetting nozzle 3, a sealed box 4, divided by a vertical partition 5 into two chambers, the first of which is equipped with a tap 6 of the vapor-gas mixture, and the second - a tap 7 of heated air and a tap 8 of the slag, supply and distribution system air through the perforated grill 9 of the chamber 1, the combined system of water drainage and air supply to the perforated walls 10 of the chamber 1 in its middle part.

The output section of the chamber 1 is introduced into the second chamber of the duct 4, and the partition 5 is inserted into the vent with a gap relative to the perforated grille 9. The first chamber of the duct 4 is equipped with a separator 11 of drip entrainment in the upper part,

The bottom of the chamber 1 is made in the form of a perforated grid 9, sections 12 installed under it, to which the nozzle 3 and the device for feeding the melt are mounted at the end wall of the chamber. At the same time, the drainage devices of the opposite pockets are connected in pairs to the shuttle valves 17, to which the air ducts are connected, and the duct 4 is equipped with a vertical partition 5 not reaching the perforated grille 9 of the chamber 1. f-ly, 2 ill.

eye summed air ducts 13 with control valves 14.

Drainage devices are perforated in the form of side

chamber walls 1 in its middle part, forming pockets 15 with water supply lines 16 with side walls of the box 4. Pipelines of opposite pockets are pairwise connected to transfer / valve 7 with I8 valves and fitted with control valves 19. Air pipes 20 with adjusting valves are connected to the rocker valves : NMI gate valves 21.

The installation works as follows.

Air ducts 13 in section 12 supply air, which through perforated grill 9 enters chamber 1. Then water is supplied through jetting nozzle 3. The control valves 19 on the pipelines 16 are opened so that water does not flow through the chamber beyond the perforated ones.

the walls 10, and is discharged through the pockets 15 and the piping 16. The position of the flap 18 of the shuttle valve 17 is set to a position, for example, vertical), ensuring the flow

water through pockets on both sides of the chamber. Tray 2 serves slag melt. The jets of water discharged from the jet nozzle at high speed crushed the slag jet into

granules that fall into the water layer in chamber I, where they harden. Gushing: and the air bubbling through a layer of water intensifies the granulation process and does not give

the granules settle on the grid 9 and stick to it. In the section of the chamber with perforated walls 10, water is drained through them, while the slag granules are retained in the chamber by these perforated walls.

The control valves I9 set the filling of the chamber I with water along its length so that the granules solidify outside, leaving them burning hot inside. Hardened, but hot granules in a stream of air passing through the perforated grid 9, form a fluidized bed elephant, in which water remains are evaporated in the section of the chamber to the partition 5. Behind the partition 5, the slag granules are cooled in a fluidized bed, heating the air. From the first chamber of the box 4 through the outlet 6 leaves the vapor-gas mixture, having passed previously through the separator 11 of drip entrainment. From the second chamber through the outlet 7, the heated air leaves, and through the outlet 8, the finished cooling and dry granulated slag is discharged.

If it is necessary to clean the pockets 15 from the slag particles stuck in them without stopping the operation, the switching valves 17 periodically switch by turning the valves 18, for example, at an angle of 45 from the vertical position in opposite directions. With each turn of the valve, the direction of the flowing water flow changes, which then flows through the left, then through the right pocket 15. At the same time, the opposite pocket first overflows due to the inertia of the water flow, and then the water flows out of it into chamber 1, flushing perforated walls 10 and pockets of particles of the flashpack.

Such cleaning of the grate is performed during the operation of the device and does not require it to be stopped. By selecting in practice an efficient switching mode of the shuttle valves 17, it is possible to work with practically clean pockets. Switching can be carried out automatically according to a predetermined program.

In order to accelerate the processes of separation of particles of slag and water, accelerate the removal of water through the opposite pockets 15, as well as enhance their cleaning, during the operation period, reversing valves 17 of the valve 21 on the air ducts 20. At the same time, through the pipeline 16 and the pocket

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15, lateral air supply is carried out, for example, through the side walls 10 into the chamber 1, through the opposite side walls, the pocket and the pipeline, water is discharged from the chamber 1. The next reversing of the valves 17 changes the direction of the air and water flows. Additional transverse circulation of granulated slag into chamber 1 below

10 by the effect of lateral air supply accelerates the separation of water, discharging it through the opposite pocket. The reverse currents of the air-water mixture enhance the cleaning of the perforated G6 walls.

For a specific sludge, temperature and other conditions and the required quality of the granulate, the frequency and order of switching valves 17 along the length of chamber 1 is chosen in practice, for example, air is supplied to the pockets 15 in chess order along the length of the chamber. Thus, this system expands the possibilities

25 control the process of granulation.

The proposed installation, in contrast to the known device, is more reliable, since it does not need to be stopped for manual cleaning of inclined gratings and slotted drainage devices and, besides dry granulated slag, it is possible to obtain heated air that is suitable for consumption.

This temperature is due to the utilization of part of the heat of the slag melt. Economy of fuel will be 5-15 kg of equivalent fuel per 1 ton of ground slag.

The proposed plant also expands the possibilities of controlling the granulation process, as well as reducing the water consumption for granulation.

Claims (3)

1. A slag melt granulation plant, comprising a melt supply device, a jetting nozzle, drainage devices, a sealed box, a chamber integrated in the box to form pockets between the side walls of the box and a chamber, the bottom of the chamber being in the form of a perforated grid partitioned duct with air intake and control devices; valves on them, and the gas outlet, characterized in that, with the aim to increase the reliability of its operation, the side walls of the chamber are wider, perforated in its middle part, the drainage devices are equipped with regulating valves and connected to the pockets, and the jetting nozzle and the device for supplying the melt are mounted at the end wall of the chamber. 2. Installation according to claim 1, characterized in that, in order to improve the cleaning of the pockets of the granulated slag without stopping the process and the wider possibilities for controlling the granulation process, the drainage devices of the opposite pockets are connected in pairs to the reversing valve, to which the air ducts are connected, 3. Installation according to claim 1, characterized in that, in order to use slag heat for heating the air, the sealed sleep box is not partitioned by a vertical partition that does not reach the unperforated grid of the chamber, nineteen ig.1 Editor L. Bobkova Compiled by I. Inozemtsev Tehred I. Popovich Order 1187/24 Circulation 588 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab. 4/5 Production and printing company, Uzhgorod, Projecto st., 4 Proofreader L.Zimokosov