RU2366877C1 - Method of tapping liquid products of melt from blast melting furnace and installation for implementation of this method - Google Patents

Abstract

FIELD: metallurgy.

SUBSTANCE: inventions refer to iron and steel industry and can be implemented at melting of iron in blast furnace or cupola. The method consists in continuous removal of iron and slag from crucible of the blast melting furnace, in cyclic accumulation of liquid products of melting in a fore hearth, in tapping iron and slag into a pool at the end of each cycle; in holding liquid products of melting in the pool during the next cycle of their accumulation in the fore hearth and in separate tapping first slag, and iron next from the pool before the end of the liquid melting products accumulation cycle in the fore hearth. The fore hearth and the pool are rotated around the common axis coinciding with horizontal or inclined to it at angle not exceeding 15°. Installations consist of the fore hearth and pool with a common metal case; they are separated with a refractory partition with a tapping port. According to the first version the fore hearth has a shape of a truncated cone and a cylinder pool designed to rotate around axis by means of a rotation drive. According to the second version the fore hearth and the pool are of cylinder shape and are designed to rotate around axis by means of the rotation drive. The fore hearth is equipped with a connecting notch. Iron and slag notches are made in the pool.

EFFECT: upgraded quality of iron.

16 cl, 3 dwg

Description

The group of inventions relates to ferrous metallurgy and can be used in the smelting of cast iron in a blast furnace or cupola.

A known method for the release of liquid smelting products from a blast furnace, including the alternate release of slag and cast iron with slag at different levels, i.e. through slag and cast-iron notches located at different levels from the bottom (see, for example, Poltavets V.V. Blast furnace production. M., Metallurgy, 1972, pp. 359 ... 363).

At first, the “upper” slag - slag accumulated above the level of the slag notch is poured through the slag notch, then pig iron and the “lower” slag - slag accumulated below the level of the slag notch are discharged through the cast iron notch. This method has a significant drawback - heterogeneity in the chemical composition of cast iron. So, between the two releases there are significantly different periods of desulfurization. In the first period, when there is still little slag in the furnace, pig iron desulfurizes poorly. In the second period before the release of the “upper” slag, when the furnace has the highest layer of slag, the desulphurization of cast iron is carried out most actively, and finally, in the period before the release of cast iron, when the “upper” slag is drained and the “lower” is saturated with sulfur, it is possible resulfurization.

According to the method described in USSR author's certificate No. 5448628, IPC 2 С21В 7/14, 1977, the release of liquid smelting products from a blast furnace is periodically performed only through a cast iron notch. Joint production of cast iron with slag helps to improve the contact of slag and cast iron, increase the degree of utilization of the desulfurizing ability of slag and reduce sulfur in cast iron. However, this method does not provide the necessary quality of cast iron, because the first two periods of iron desulfurization described above are retained.

The closest technical solution to the claimed method is a method of releasing liquid smelting products from a shaft smelting furnace (cupola) (Dolotov G.P., Kondrakov E.A. Furnaces and drying foundries, M., "Mechanical Engineering", 1990, pp. .166 ... 172).

According to this method, the liquid smelting products from the forge of a mine smelting furnace are continuously poured through a connecting notch into a piggy bank, while stable results both in overheating and in the chemical composition of cast iron can be obtained only when all the cast iron and slag are removed from the furnace constantly. From the piggy bank, slag and cast iron are produced separately and cyclically. When the slag level reaches a predetermined volume, the slag is discharged through the slag notch, after which the iron is drained through the cast iron notch. With this method of releasing liquid smelting products, the deoxidizing and desulfurizing abilities of slag are irrationally used; therefore, additional processing is necessary to improve the quality of cast iron.

The technical task is to improve the quality of cast iron smelted in a shaft smelter.

The solution to the technical problem is achieved by the fact that in the method of releasing liquid smelting products from a shaft smelting furnace, comprising continuously removing pig iron and slag from the furnace of a shaft smelting furnace through a connecting notch into a piggy bank, cyclically accumulating liquid smelting products in a piggy bank, and separately discharging slag and pig iron At the end of each cycle of accumulation of liquid melting products in the piggy bank, pig iron and slag are jointly released from the piggy bank to the sump, in which the liquid melting products are kept for the next its accumulation cycle, the piggy bank and the sump are rotated around a common axis that coincides with the horizontal or deviated from the horizontal by an angle of no more than 15 °, with a period equal to the accumulation cycle, and the separate discharge of slag and cast iron is carried out from the sump before the end of the accumulation cycle of liquid smelting products in piggy bank. The operations of the joint release of pig iron and slag from the piggy bank to the sump, the discharge of slag and pig iron from the sump are carried out at the following angles of rotation of the piggy bank and sump around a common axis: 315 ... 360 ° - the joint release of pig iron and slag from the piggy bank to the sump, 135 ... 180 ° - exhaust slag from the sump, 225 ... 270 ° - the release of cast iron from the sump, while the reference point is the passage of the bottom point of the piggy bank to the bottom of the piggy bank. With the accumulation of liquid melting products in the piggy bank, pig iron is desulfurized, for example, by introducing a desulfurizer into a stream of melt flowing from the connecting gap into the piggy bank. When the liquid melting products are held in the sump, the pig iron is desulfurized, for example, by blowing the powder desulfurizer into a jet of pig iron discharged from the piggy bank into the sump.

Devices for implementing the inventive method are independent objects of the invention.

From the description to the USSR author's certificate No. 337404, IPC С21С 1/06, 1972, a swinging money box is known for releasing liquid melting products from a cupola. It contains a container, cylindrical or rectangular in cross section, with an inlet, a metal and slag notch, a rotation drive and a metal level control device and a rotation drive. Such a drive does not allow the rational use of the deoxidizing and desulfurizing capabilities of the slag, and, consequently, the production of cast iron of the required quality without additional processing.

The technical task is to improve the quality of metal smelted in a shaft smelter due to a more rational use of deoxidizing and desulfurizing capabilities of slag.

In the first embodiment, the solution of the indicated technical problem is achieved by the fact that the device for discharging liquid melting products from the shaft smelting furnace, including a first tank - a piggy bank with an inlet in which a connecting tap hole, a rotation drive, slag and cast iron tap holes are mounted, additionally contains a second tank - a sump , the piggy bank and the sump have a common housing with an internal refractory lining and are separated by a refractory partition, the piggy bank is made in the form of a regular truncated cone, in which the axis is rotated I horizontally forms an excess angle of not more than 15 °, the angle at the apex is equal to or exceeds twice the angle of the axis of rotation of the cone with the horizontal, and the smaller and larger bases are normal to the axis of rotation, the sump is made in the form of a cylinder, whose diameter is 1.4 ... 2, 0 times the diameter of the larger base of the piggy bank cone, the length is 0.5 ... 1.0 the length of the piggy bank, and the axis of rotation is a continuation of the axis of rotation of the piggy bank cone, in the refractory partition between the piggy bank and the sump there is a drain hole at the level of intersection of the of the base and the inner wall of the piggy bank, the cast iron and slag notches are made in the sump, the cast iron notch being made in the base conjugated with the piggy bank at the level of intersection of this base with the inner surface of the settler, and the slag notch in the opposite base at the upper boundary of the cast iron layer, the inlet of the piggy bank is made in the center of the small base.

где Q - объем чугуна, на выпуск которого рассчитана установка, кг; V - скорость протекания жидких продуктов плавки через соединительную летку копильника, кг/мин, α - коэффициент шлакообразования в плавке; Т - время одного оборота копильника и отстойника вокруг оси вращения. В устройствах взаимное пространственное положение сливного отверстия между копильником и отстойником, шлаковой и чугунной леток отстойника соответствует прохождению ими нижней точки при вращении копильника и отстойника в последовательности: сливное отверстие между копильником и отстойником, шлаковая летка отстойника при дальнейшем повороте на 135…180° и чугунная летка отстойника - при повороте на 225…270° после прохождения нижней точки сливным отверстием. Сливное отверстие снабжено индукционным нагревателем.In the second embodiment, a device for discharging liquid smelting products from a shaft smelting furnace, including a first tank - a piggy bank with an inlet in which a connecting tap hole, a rotation drive, slag and cast iron tap holes are mounted, further comprises a second tank - a sump, a piggy bank and a sump have a common metal casing with internal refractory lining, made in the form of cylinders joined by butt ends with a common horizontal axis of rotation, the diameter of the sump is 1.4 ... 1.8 times the diameter, and the length is 0.5 ... 1.0 length The piggy bank, the sump and the piggy bank are separated by a refractory partition in which a drain hole is made at the level of the intersection of the partition with the inner surface of the piggy bank; the surface of the sump, and the slag notch - in the opposite end at the level of the upper boundary of the cast iron layer, the inlet of the piggy bank is made in the center of the end. In the first and second embodiments, the device further comprises a pipe channel passing through the sump into the piggy bank along the axis of rotation and equipped with nozzles located in the piggy bank and the sump. The pipe channel additionally contains gas burners, the rotation drive of the device provides the joint rotation of the piggy bank and the sump around a horizontal axis with a period equal to

where Q is the volume of cast iron for the production of which the installation is designed, kg; V is the rate of flow of liquid smelting products through the connecting notch of the piggy bank, kg / min, α is the slag formation coefficient in the smelting; T is the time of one revolution of the piggy bank and sump around the axis of rotation. In the devices, the mutual spatial position of the drain hole between the piggy bank and the settler, the slag and cast iron notch of the settler corresponds to their passage through the lower point when the piggy bank and the settler rotate in the sequence: drain hole between the piggy bank and the settler, the slag notch of the settler upon further rotation by 135 ... 180 ° and the cast iron sump tank - when turning 225 ... 270 ° after passing the bottom point with a drain hole. The drain hole is equipped with an induction heater.

The invention is illustrated by drawings.

Figure 1, a and 1, b conventionally depicted the moments of release of liquid smelting products during rotation of the piggy bank and sedimentation tank.

Figure 2 shows an example of a device for the release of liquid smelting products from a shaft smelter in the embodiment with a cone-shaped piggy bank.

Figure 3 shows an example of a device for the release of liquid smelting products from a shaft smelter in a variant with a cylindrical piggy bank.

In figure 2 and 3, the numbers indicate:

1 - piggy bank,

2 - sump

3 - axis of rotation of the piggy bank and sedimentation tank,

4 - metal case,

5 - refractory lining,

6 - refractory partition,

7 - drain hole of the piggy bank,

8 - inlet of the piggy bank,

9 - connecting letka,

10 - cast iron notch of a mine smelting furnace,

11 - shaft melting furnace

12 - cast iron sump tank,

13 - slag sludge sump,

14 - a layer of cast iron,

15 - slag layer,

16 - rotation drive,

17 - videos

18 - guides

19 - pipe channel

20 - nozzle for introducing a desulfurizer,

21- nozzle for introducing a desulfurizer,

22 - technological cone,

23 - gas outlet,

24 - horn

25 is a technological cylinder,

26 - gas burners,

27 - induction heater.

The claimed method is implemented as follows.

After the shaft melting furnace is brought back to normal operation, a device for discharging liquid melting products is connected to a cast iron notch through a connecting notch (or trough), which are, for example, two conjugated, horizontally arranged, cylindrical tanks separated by a refractory partition with a drain hole. Capacities rotate around a common horizontal axis at a given speed. From the hearth of a mine smelting furnace (blast furnace or cupola), the molten iron and slag are continuously poured through the cast iron and connecting slots into the first tank, which is a piggy bank. The drain hole in the partition between the first and second tanks is made at the level of the inner surface of the piggy bank and is designed for such a throughput that until it drops as a result of rotation of the piggy bank from the level of the accumulated melt to the lower point, all slag and cast iron have merged through it into the second tank, called a sump. In the sump, the liquid melting products are aged until the next discharge from the piggy bank. Cast iron and slag from the sump are produced separately. First, slag is released through the slag notch, then through cast iron - cast iron. To ensure this, the slag notch is made at the level of the upper boundary of the cast-iron layer, and the cast-iron notch is at the level of the inner surface of the sump. The spatial position of the slag and cast iron notches must be such that all the cast iron is discharged from the piggy bank into the sump before the pig iron and slag start to drain into the sump, and all slag is released before the pig iron starts to discharge. This is guaranteed if the passage of the cast iron taphole bottom point is a quarter of a turn and the slag tap hole is half a turn ahead of the bottom point by a drain hole.

When using the inventive method for the release of liquid smelting products from a shaft smelting furnace, the quality of cast iron is improved, because:

- continuous removal of liquid smelting products from the furnace hearth stabilizes the melting conditions;

- mixing of cast iron in the piggy bank and sump during rotation of the latter normalizes the chemical composition of cast iron by volume;

- during the rotation of the piggy bank and the sump, due to the fact that the shift of the pig-iron layer lags behind the shift of the slag layer, the contact area of these layers increases significantly, and therefore, the deoxidizing and desulfurizing capabilities of the slag are used more rationally.

The quality of cast iron can be further improved by introducing desulfurizers into pig iron in a piggy bank or sump. This does not present technical difficulties and allows you to organize continuous casting of metal without additional spillage into ladles and transportation, especially since the rate of release is almost constant.

Another advantage of the proposed method for the release of liquid smelting products from a shaft furnace is that without disrupting the technological regime, it is possible to easily control the volume of one-time production of pig iron by changing the rotation speed of the piggy bank and sedimentation tank and the level of opening and closing of the slag tap hole. In more detail, the implementation of the claimed method is described when describing the operation of the claimed devices.

где Q - объем чугуна, на выпуск которого рассчитано устройство, кг; V - скорость протекания жидких продуктов плавки через соединительную летку 9, кг/мин; α - коэффициент шлакообразования - отношение выхода шлака на тонну чугуна; Т - время одного оборота копильника 1 и отстойника 2 вокруг оси 3, мин. Пространственное положение сливного отверстия 7, леток 12 и 13 таково, что до начала слива шлака и чугуна из копильника 1 в отстойник 2 весь чугун должен быть выпущен через летку 12, а до начала выпуска чугуна через летку 12 из отстойника 2 должен быть выпущен весь шлак через летку 13. Это гарантировано обеспечивается, если при вращении копильника 1 и отстойника 2 прохождение леткой 12 нижней точки опережает на четверть оборота прохождение нижней точки сливным отверстием 7 и отстает на четверть оборота от прохождения нижней точки леткой 13. Такое расположение леток 12 и 13 и сливного отверстия 7 на стенках отстойника 2 изображено на фиг.2 в сечениях А-А и Б-Б. Заявленное устройство (фиг.2) может дополнительно содержать трубный канал 19, проходящий по оси 3 через отстойник 2 в копильник 1 и предназначенный для подачи десульфуратора через сопло 20 в струю расплава, вытекающего из соединительной летки 9, или для подачи десульфуратора или модификатора через сопло 21 в струю чугуна, вытекающего из сливного отверстия 7 и подогреваемого с помощью индукционного нагревателя 27.The claimed device for the release of liquid smelting products from a shaft smelting furnace in the first embodiment, an embodiment of which is shown in figure 2, contains a first tank - a piggy bank 1, a second tank - sump 2, which are made in the form of bodies of revolution with a common axis 3 rising above the horizontal at an angle not exceeding 15 °. Piggy bank 1 has the shape of a regular truncated cone, i.e. cone, in which the smaller and larger bases are normal to the axis 3, and each normal section is a circle. The angle at the top of the cone of the piggy bank 1 is equal to or greater than twice the angle between the axis 3 and the horizontal. The sump 2 is made in the form of a cylinder, in which the diameter is 1.4 ... 2.0 more than the diameter of the piggy bank, and the length is 0.5 ... 1.0 of its length. The piggy bank 1 and the sump 2 are enclosed in a common metal casing 4 with an internal refractory and slag-resistant lining 5 and are separated by a refractory partition 6 with a drain hole 7 at the level of the inner surface of the piggy bank 1. In the center of the smaller base of the piggy bank cone 1 there is an inlet 8 with a connecting connector 9. If the connecting notch 9 is connected to the cast-iron notch 10 of the shaft smelting furnace 11 rigidly, then the possibility of free rotation of the connecting notch 9 in the input holes 8. In sump 2, a cast-iron notch 12 and slag notch 13 are installed, designed for separate discharge of slag and cast iron from the settler 2. Notch 12 is installed at the level of the inner surface of the settler 2 in the wall adjacent to the piggy bank 1. The notch 13 is installed in the opposite wall on the level of the upper boundary of the cast-iron layer 14. It is possible to install the slots 12 and 13 in one wall or use only one tap-hole 12, through which the slag layer 15 is first released, and then the cast-iron layer 14. However, in these cases, difficulties arise in exporting h ugun and slag from one overpass. The sequence of cast iron and slag discharge into the settler 2 and the discharge of slag and cast iron from the settler 2 is caused by the rotation of the piggy bank 1 and settler 2 around the axis 3 by means of a rotation drive 16, which through the rollers 17 installed on both sides, rotates the guides 18 so that one turnover was carried out over time

where Q is the volume of cast iron for the release of which the device is designed, kg; V is the flow rate of liquid smelting products through the connecting groove 9, kg / min; α - coefficient of slag formation - the ratio of the output of slag per ton of pig iron; T is the time of one revolution of the piggy bank 1 and sump 2 around the axis 3, min. The spatial position of the drain hole 7, holes 12 and 13 is such that before the slag and cast iron are drained from the piggy bank 1 to the settling tank 2, all cast iron must be discharged through the notch 12, and all slag must be discharged through the let 12 from the settler 2 through the tap hole 13. This is guaranteed if, when the piggy bank 1 and sedimentation tank 2 are rotated, the passage of the lower point 12 by the tap hole 12 is ahead of the passage of the lower point by the drain hole 7 by a quarter of a turn and is a quarter turn behind the passage of the lower point by the tap hole 13. This distribution decomposition of notches 12 and 13 and drain holes on the walls of the settler 7 2 shown in Figure 2 in cross-sections A-A and B-B. The claimed device (figure 2) may further comprise a pipe channel 19 passing along the axis 3 through the sump 2 into the piggy bank 1 and designed to supply the desulfurizer through the nozzle 20 into the jet of melt flowing from the connecting gap 9, or to supply the desulfurizer or modifier through the nozzle 21 into a stream of cast iron flowing from a drain hole 7 and heated by an induction heater 27.

Additionally, the pipe channel 19 may include a pipeline for supplying combustible gas to the gas burners 26, by means of which the piggy bank 1 and sump 2 are heated.

Technological cone 22 does not play a significant role in the process of releasing liquid smelting products from a shaft smelter. It is designed to simplify the sealing of the sump 2 and the possibility of rotation of the piggy bank 1 and sump 2 without the growth of dimensions in height. The cone 22 may be provided with a gas outlet 23 for exhausting gases that burst into the piggy bank 1 and a sump 2 from the hearth 24 of the shaft smelting furnace 11. The gas outlet 23 must have an airtight shutter so that it is possible to create increased pressure in the sump 2 when magnesium is introduced into cast iron as magnesium desulfurizer .

The claimed device for the release of liquid smelting products from a shaft smelting furnace in the second embodiment, an implementation example of which is shown in FIG. 3, is structurally different from the first embodiment in that the piggy bank 1 has the shape of a cylinder and the axis 3 coincides with the horizontal. As a result, it contains the same elements as the previously described device, except that the process cone 22 is replaced by a process cylinder 25, the purpose of which is the same. In all other respects, what was said about the elements of the device in the first embodiment relates to elements in the second embodiment.

The claimed device operates as follows.

The melt from the hearth 24 through the cast iron notch 10 of the mine smelting furnace and the connecting notch 9 continuously flows into the money-box 1. As soon as the drain hole 7, as a result of the rotation of the money-box 1 around axis 3, has passed the lowest point, liquid melting products will begin to accumulate in the money-box 1 and the slag will separate from cast iron. When the piggy bank 1 rotates, first a slag layer and then a layer of cast iron will be rolled on its lined inner walls, while in addition to mixing the cast iron, the slag layer in contact with the cast iron will be displaced and updated. As a result, the desulphurization of cast iron will be more intense. When the piggy bank 1 makes a complete revolution and the drain hole 7 is again below, through it slag will first merge into the sump 2, and then the pig iron accumulated during the turnaround time, while the stream of pig iron will flow through the slag layer. In the sump 2 as a result of its rotation around the axis 3, further mixing of cast iron and its desulfurization are carried out. Since the contact area of the cast iron layer 14 and the slag layer 15 is constantly updated, the desulphurization of cast iron is intensive. When the tap hole 13 is lowered, the entire layer of slag 15 is discharged from the sump. The remaining layer of cast iron as a result of mixing has a more uniform composition than cast iron discharged from a shaft smelter without the claimed device. After the release of pig iron from the settler 2, the drain hole 7 is lowered to the lower position and the pig iron and slag accumulated in the piggy bank are discharged into the settler 2. Then the cycle repeats. The claimed device can operate in discrete mode of rotation of the piggy bank 1 and sump 2, when they periodically turn a quarter of a turn. To intensify the mixing of cast iron, the lining in the piggy bank 1 and the sump 2 can be made ribbed with a height of ribs of 0.05 ... 0.1 of the thickness of the lining.

The quality of the cast iron produced can be improved by desulfurizing the cast iron in the piggy bank 1 or settling tank 2. This can be done either by blowing finely divided lime into a stream of melt flowing from the connecting nozzle, or by spraying lime powder into the lining in the piggy bank 1 and / or settling tank 2, or by blowing with an inert gas of powdered magnesium in a stream of cast iron when draining from the piggy bank 1 to the sump 2. A pipe channel 19 with nozzles 20 and 21 is intended for supplying desulfurizers. The implementation of the claimed devices will not technically insurmountable difficulties. The inner lining can be made in three layers - the outer layer in contact with the metal body, it is advisable to make of lightweight brick, because it should perform the functions of a heat insulator, the middle layer can be laid out of high-alumina brick, and the inner one from corundum, because these layers must be refractory and slag resistant. The refractory partition should be made of corundum brick. The drain hole, slag and cast iron notches are sealed with corundum. The connecting taphole can be made of zirconium concentrate. The metal body can be made of low carbon steel in the form of a welded structure. Guides and rollers - from tool steel.

In comparison with the known claimed devices can produce better cast iron during its smelting in shaft smelting furnaces.

Claims (16)

1. A method of releasing liquid smelting products from a mine smelting furnace, comprising continuously removing pig iron and slag from the furnace of the mine smelting furnace through a connecting notch into the piggy bank, cyclically accumulating pig iron and slag in the piggy bank and separately discharging them, characterized in that at the end of each accumulation cycle pig iron and slag in the piggy bank carry out their joint release from the piggy bank to the sump, in which the pig iron and slag are kept for the next accumulation cycle, the piggy bank and the sump are rotated around a common axis that coincides with a horizontal or deviated from the horizontal by an angle of no more than 15 ° with a period equal to the accumulation cycle, and the separate release of slag and cast iron is carried out from the sump before the end of the accumulation cycle in the piggy bank. 2. The method according to claim 1, characterized in that the operation of the release of pig iron and slag from the piggy bank to the sump, and the release of pig iron and slag from the sump is carried out by rotating the piggy bank and sump around a common axis, while the joint release of pig iron and slag from the piggy bank into the sump carried out at 315-360 °, the release of slag from the sump at 135-180 °, and the release of pig iron from the sump at 225-270 °, and the reference point is the passage of the bottom point of the piggy bank drain center. 3. The method according to claim 1, characterized in that during the accumulation of pig iron and slag in the piggy bank, pig iron is additionally desulfurized, for example, by introducing a desulfurizer into the melt stream flowing from the connecting gap into the piggy bank. 4. The method according to claim 1, characterized in that when the iron and slag are kept in the sump, the iron is desulfurized, for example, by blowing the powder desulfurizer into a stream of iron, drained from the piggy bank into the sump. 5. A device for discharging liquid smelting products from a mine smelting furnace, comprising a piggy bank, a connecting tap hole, a rotation drive, and a slag and cast iron tap hole mounted in its inlet, characterized in that it further comprises a settler, while the collector and settler have a common housing with a common axis of rotation and with an internal refractory lining and separated by a refractory partition, the piggy bank is made in the form of a regular truncated cone in which the axis of rotation forms an excess angle of not greater than horizontal e 15 °, the angle at the apex is equal to or greater than twice the angle between the axis of rotation and the horizontal, and the smaller and larger bases are normal to the axis of rotation, the sump is made in the form of a cylinder, the diameter of which is 1.4-2.0 times the diameter of the larger base the piggy bank cone, the length is 0.5-1.0 the length of the piggy bank, and the axis of rotation is a continuation of the axis of rotation of the piggy bank cone, in the refractory partition between the piggy bank and the sump there is a drain hole at the level of intersection of the larger base and the inner wall of the piggy bank, the unary and slag notches are made in the sump, and the cast iron notch is made in the base conjugated to the piggy bank at the level of intersection of this base with the inner surface of the settler, and the slag notch in the opposite base at the level of the upper boundary of the cast iron layer, with the inlet of the piggy bank in the center small base cone. 6. The device according to claim 5, characterized in that it further comprises, passing through the sump into the piggy bank along the axis of rotation, a pipe channel with nozzles in the piggy bank and sump. 7. The device according to claim 6, characterized in that the pipe channel further comprises gas burners. 8. The device according to claim 5, characterized in that the rotation drive provides the joint rotation of the piggy bank and the sump around a common axis with a period equal to

where Q is the volume of cast iron for the release of which the device is designed, kg; V is the flow rate of liquid smelting products through the connecting notch of the piggy bank, kg / min; α is the slag formation coefficient in the smelting, defined as the ratio of slag yield per tonne of pig iron; T is the time of one revolution of the piggy bank and sump around a common axis of rotation, min. 9. The device according to claim 5, characterized in that it is made from the condition of the mutual spatial position of the drain hole between the piggy bank and the sump, the slag and cast iron notch of the sump, corresponding to the successive passage of the lower point during rotation of the piggy bank and the sump of the drain hole between the piggy bank and the sump, slag let holes of the sump - with a further turn of 135-180 ° and cast-iron holes of the sump - with a turn of 225-270 ° after passing the bottom point with a drain hole. 10. The device according to claim 5, characterized in that the drain hole of the piggy bank is equipped with an induction heater. 11. A device for discharging liquid smelting products from a mine smelting furnace, comprising a piggy bank, a connecting tap hole, a rotation drive and a slag and cast iron tap hole mounted in its inlet, characterized in that it further comprises a settler, while the collector and settler have a common metal casing with internal refractory lining and made in the form of cylinders joined by the ends with a common horizontal axis of rotation, the diameter of the sump is 1.4-1.8 times the diameter of the piggy bank, and the length is 0.5-1.0 of its lengths The sump, the sump and the piggy bank are separated by a refractory partition in which a drain hole is made at the level of the intersection of the partition with the inner surface of the piggy bank, the cast iron and slag tap holes are made in the settler, and the cast iron tap hole is made in the end mating with the piggy bank, at the level of the intersection of the end surface with the inner surface of the settler, and the slag notch in the opposite end of the settler at the level of the upper boundary of the cast iron layer, and the inlet of the piggy bank is made in the center of the end. 12. The device according to claim 11, characterized in that it further comprises, passing through the sump into the piggy bank along the axis of rotation, a pipe channel with nozzles in the piggy bank and sump. 13. The device according to p. 12, characterized in that the pipe channel further comprises gas burners. 14. The device according to claim 11, characterized in that the rotation drive provides the joint rotation of the piggy bank and the sump around a common axis with a period equal to

where Q is the volume of cast iron for the release of which the device is designed, kg; V is the flow rate of liquid smelting products through the connecting notch of the piggy bank, kg / min; α is the slag formation coefficient in the smelting, defined as the ratio of slag yield per tonne of pig iron; T is the time of one revolution of the piggy bank and sump around a common axis of rotation, min. 15. The device according to claim 11, characterized in that it is made from the condition of the mutual spatial position of the drain hole between the piggy bank and the sump, the slag and cast iron notches of the sump, corresponding to the successive passage of the lower point during rotation of the piggy bank and the sump of the drain hole between the piggy bank and the sump, slag let holes of the sump - with a further turn of 135-180 ° and cast-iron holes of the sump - with a turn of 225-270 ° after passing the bottom point with a drain hole. 16. The device according to claim 11, characterized in that the drain hole of the piggy bank is equipped with an induction heater

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