SU1206245A1 - Method of granulating melt and device for effecting same - Google Patents

Abstract

1. The method of melt granulation, mainly blast-furnace or steel slag slag, by dispersing and simultaneously cooling the melt to produce granules, cooling dein after the ones in the water tank and removing the granules from the tank, which differs from those, in order to reduce the moisture content of the granules, prior to dispersion, the melt is pre-cooled to a temperature above the liquidus temperature or the temperature of the aggregate transformation of the melt, and the granules are cooled to 100-400 ° C. 2. The dp melt granulation device containing the drain chute, granulator with at least one nozzle dp iodine dispersing agent per alloy, receiving capacity dp granule, characterized in that, in order to reduce the humidity of the granule, it is equipped with a thermostat atom, made in the form of a sheath fixed in This tuyere is made with a tuyere, or at least with one nozzle, the length of its axis or with at least one row of nozzles along its height, and the nozzles in a row are located at the same distance from the other, besides , the lance is fixed lena zharnnrmo with in - mozhnostyo vertical perenetse- audio, and the nozzles are fixed with the possibility of peremetseyus vvamnio per- peidikul polar planes relative to the axis. 0 9) U sd

Description

The invention relates to ferrous metallurgy, in particular, to the method of granulation of a blast furnace, steelmaking slag and to a device for its implementation, and can be used in a foundry industry.

The purpose of the invention is to reduce the moisture content of the granules.

Figure 1 shows the device, the plan} figure 2 is a section in fig.I; on fig.Z - section in figure 1.

The device contains a chute I dp of the melt drain, for example, a fusible ball from the blast furnace to the ternostat 2, made in the form of a shell with a collecting receiving funnel. Inside the thermostat, preferably along its axis, a lance 3 is installed with the nozzles 4 supplying water to the thermostat. The nozzles are made in the form of a replaceable nozzle from a wear-resistant material with a longitudinal or lateral cylindrical, conoidal, conical or other shaped hole.

The tuyere 3 is mounted on a base, shh, preferably, on the base and on a hinge, with a joint with a drive of periodic lifting, lowering and fixing 3 in the vertical plane between the extreme upper and lower position of the nozzles 4 tuyere. Lastly, through the water flow regulator (valve), for example, by means of a flexible hose, is connected to the water duct. in tuyere 3. Under the chute I and the thermostat. Volume 2 there is a granulator 5, on which a plate 6 with nozzles is installed. Each nozzle is made in the form of a replaceable nozzle from a wear-resistant material with a longitudinal cylindrical conoidal-1ShN, a conical or other shaped hole. Granulator 5 is provided with a rotation (tilt) drive 7 in a vertical plane. Chute 1, terrostat 2 and graktor tor are located at the entrance to the receiving tank 8.

Example 1. A dp granule 10 and a melt, for example a blast furnace, between drain chute I and hydromonite-granulator 5. Install thermostat 2 so that the last liquid inlet in the upper part adjoins chute I and the melt outlet dp is located in zoe action of water flow formed by hydromonitor-granulator 5.

ten

15

06245

Prior to the melt extraction, the receiving tank 8 is filled with water up to the level required by the technology. During production, the melt is drained, for example, from the blast furnace along the chute 1. With some advance or simultaneously with the melt being drained from the trench, the nozzle 4 of the tuyere 3 forms a flow of water and with the advance or with iMecTHo with the melt is fed into the thermo | stat 2. At the same time, the flow rate (flow rate) of water (kg per ton of melt) is less than the flow rate (flow rate) of water, theoretically necessary for solidification of the melt. For example, with regard to the granulation of a natural melting blast shpak, the intensity of the supply (consumption) of water in a thermostat is 1–20 kg of water per ton of melt to be granulated. - During the release by means of a regulator (valve), optimize the intensity of the water supply to the thermostat and thus maintain (stabilize) the optimal level of the flow rate (flow) of water to the thermostat. In this way, the melt is pre-cooled prior to the granulation to the optimum or temperature granulation, for example, in the range of 1400 + 10 ° C, and the latter is maintained during the melt discharge through the thermostat. With some advance or simultaneously with the discharge of the melt from the thermostat 2 by the hydromonitor-granule

20

2S

thirty

35

Torus 5 under pressure up to 8 MPa, for example, 3.5 MPa forms and directs the flow of water to the side surface of the melt that flows vertically downward. thermostat 2.

In this way, the side of the hydromonitor is treated vertically with the melt hoTOK at the optimum angle of attack, breaking it into drops, and the latter are cooled down to solidification in the form of granules. The direction of flow of water from the jet monitor relative to the jet of the pre-cooled melt and the surface of the water mirror ... in the receiving tank 8 is set using the actuator 7 of the jet monitor .5 depending on the intensity of the melt from the thermostat 2. The more intense the melt vertical plane between the horizon and

the direction of flow of water from the monitor 5 and vice versa. The melt granules along with the flow of water popag are given into the receiving tank for the granules with water, and finally, the OHP is eaten. Hardened granules are removed outside the receiving tank, for example, by means of airlift or dredge pump.

Other embodiments of the present invention are possible.

Example 2. The device is molded analogously to example 1, but the lance 3 is designed as an annular conduit enclosing the thermostat, and the nozzles 4 are symmetrically placed along the perimeter in the wall, a thermostat at one-five, preferably at three, levels along the height of the thermostat and with the internal cavity of the latter.

PRI me R 3. The device is made similarly to examples 1 and 2, but located on the melt drain path between the chute 1 and the receiving tank 8, the thermostat 2 with the nozzle 4 inside the lower edge is connected through the gap to the receiving tank.

PRI me R 4. The device is made analogously to example 3, but I place the lower edge of the thermostat within the receiving tank below the liquid outlet located in its upper part.

PRI me R 5. The device is manufactured similarly to Examples 1-4, but the receiving tank 8 at the bottom level is provided with outlets for water with shut-off valves or preferably with a separate output for a gravel in the form of a gravity hole or an electromagnetic vibrator. In this case, partly or completely, the diode is made in the form of a slip plane with an inclination towards the exit for the granules, for example, at an angle equal to the angle of repose of the latter in the container 8.

The best option for the manufacture of a device is to manufacture it in accordance with Example I. This option fits completely into the house-based and separate slag granulation plants operating at the metallurgical enterprises. Therefore, the practical implementation of the proposed device

206245.

Example I does not require a large investment of time and money.

In the device of Example 2 or 3, part of the water of its total flow rate 5 is fed to the melt granulation and cooling the granulate through the nozzle 4 along the thermostat perimeter with an intensity equal to the theoretically necessary flow rate

Water to cool the melt to the solidus temperature, and the rest of the water is fed to the receiving tank and at a temperature not higher than the solidus solidus temperature, the grains from the thermostat are unloaded (dumped) from the height through the gap to the free surface of the water in adhesion tank 8.

When using the device

20 according to Example 4, the thermostat granules are discharged under the free surface of the water flow below the level of its outlet located in the upper part of the receiving tank 8.

25 When manufacturing the ho device of Example 5, pellets from a thermostat are dropped on an inclined surface to the outlet (outlet) unloading for them in the lower part of the receiving tank 8. After the melt is drained and the granulate is cooled to the required temperature, the temperature is opened Ventsh1 8 for water outlet and by gravity drain water, for example,

5 in the drainage of its circulating cycle. After that, open the exit valve of the granules P of the lower part of the receiving tank and by gravity (or within the container by gravity, and within the output - forcibly, for example with a vibrator), the granules are unloaded. the limits of the receiving tank 8, preferably to the transport organization, a conveyor, a car, railroad cars).

The optimal variant of the practical implementation of the proposed method is the implementation of example I, since

50 costs and time for the implementation of the method is minimal. The advantage of the proposed method of granulation n device. for its implementation is

55 in improving the quality, in particular, the density and granularity of the granulate, as well as in reducing the moisture content of the latter. This is caused by wholesale nnea 40

S12062456

the temperature of the melt with the operative cooling of the latter by granulation with joint feeding and reduction of the melt overheating of the melt and water into the thermostat from its pre-lines)

L

Fitch9

Editor I. Derbak

Compiled by I. Inozemtsev

 I.Astalosh Corrector I.Maksimoshoshnets

Order 8641/23. Circulation Submission

VNIIPI State Committee of the USSR

for inventions and ot1S | M1TNy 11E035 “Moscow, Zh-E5, Raushsk nab., 4 / S

Branch PLP Pateit, g. Uzhgorod, st. 1 octna, 4

Claims (2)

'1. A method of granulating a melt, mainly blast furnace or steelmaking slag, by dispersing and simultaneously cooling the melt to obtain granules, cooling the latter in a vessel with water and removing granules from a vessel, which differs from to reduce the moisture content of granules prior to dispersing the melt is pre-cooled to a temperature above the liquidus temperature or the melt temperature of the aggregate conversion, and the granules' is cooled to 100-400 ⁱⁿ S. 2. A device for granulating a melt containing a drain chute, a granulator with at least one nozzle for supplying a dispersing agent to the melt, a receiving container for granules, characterized in that, in order to reduce the moisture of the granules, it is equipped with a thermostat installed behind the drain chute made in the form of a shell with a lance placed in it, the lance is made either at least with one nozzle along its axis or with at least one row of nozzles along its height, and the nozzles in a row are located along the perimeter of the tuyere the distance from one another, in addition, the tuyere is installed in a random manner with the possibility of vertical movement, and the nozzles are fixed with the possibility of movement in mutually perpendicular planes relative to the axis.