SU40857A1 - Mechanical Ore Furnace - Google Patents

Description

3 of the main patent .Nc 36959 describes a mechanical furnace for roasting ore with several horizontally filled chambers connected to each other by chambers that are interconnected by holes, alternately either in the middle or at the edge of the bottom plates with keshalki, preferably made of fire and acid-resistant metal parts, cooled from the inside by air, with an air supply heated in the furnace itself for firing the ore in the working space. To reduce the height of the calcining chambers and to facilitate the design of the agitators, the free ends of the agitator arms rest on the rollers supporting them.

The proposed mechanical furnace is intended for roasting sulfur ores, especially zinc blende. This kiln differs from conventional devices of this kind in its design, which, according to the inventor, at a relatively low cost of manufacture and exploitation of the kiln, provides a very good firing. The output of j surveyed ore in comparison with the usual obj: the annephthalmic furnaces has increased significantly, the quality has improved: the zinc blende is improved, I so that the ore leaves the new furnace I with such a low sulfur content that it becomes wet after firing Judged quite satisfactory metallurgical processing.

Such a result of roasting can be achieved, as is well known, by blowing additional air into the zone of the main reaction j into sliding and falling; down the ore. As is known, the effect of the blown-in air can be very: greatly enhanced by choosing an appropriate design of firing chambers, which should be as low as possible, as well as bringing this air in a preheated state to those of the kiln which require that occur during firing chemicals:; physical processes; Fresh air, investigator, is brought in such a way that

The ore that has reached the hearth, in which the additional air is blown, as well as the adjacent hearths, is well ventilated by air, while at the same time the ore at the place where the additional air is supplied is cooled and thanks to it becomes porous. The amount and temperature of the additional air is exactly consistent with the firing conditions, so that both too low temperatures that create the danger of sulphate formation and too high temperatures are avoided to prevent the formation of ferrites and the sintering of the roasted ore. This device is also beneficial in terms of increasing the service life of all parts of the furnace that are subject to unusually high voltages due to the high temperature, so that there are very significant economic benefits, since costly repairs and interruptions associated with it are avoided.

The air, which, in the conventional countercurrent process, is passed through the furnace from bottom to top, is supplied to the discharge shaft in a properly heated state. Here it acts on the falling ore, due to which firing occurs also in the silo itself, which is also advisable to be heated. The action produced here by this air is especially useful, because the porosity of the calcined ore is provided by the impact exerted on it by the additional air.

As is well known, in the last stage, the ore being calcined, in view of the low sulfur content, does not develop the required heat necessary for a reliable completion of the calcination, so that additional heat is required for this hearth ;. From this heat, fresh air is delivered, where: the heated air in the exit shaft is heated; the rest of the heat is supplied by heating the bottom pod using a heater located under the low frequency; Due to this, the roasting process can also proceed without blemish on the bottom of the hearth.

With ores, from which sulfur is removed with difficulty, especially with

zinc remains, it is possible to remove sulfur not only in the furnace, but additionally also in the silo itself. At the same time, it is advisable to produce air blowing through the pipe system located at the bottom of the silo so that this air passes through the layer of ore from the bottom upwards; in this case, the blown air, together with the gases generated during roasting, goes upwards.

However, air, as is well known, can also be supplied to the top, for example, from the hollow shaft of the furnace by blowing air into the heated ore, which is used to cool the oven's broomsticks.

The firing method described above, for which, according to the invention, new calcining furnaces have been designed, is meant, on the one hand, the fullest removal of sulfur from the ore is possible, provided that the formation of sulphates is eliminated in order to ensure, as far as possible, the best metallurgical processing of the obtained metal ore, on the other hand, this method makes it possible to obtain gaseous products with as high a percentage of sulfur gases as possible in order to create an economic and profitable processing of these gases to sulfuric acid. In certain cases, however, it may be beneficial to cause the formation of sulfates, but without the sulfur content in the burnt ore being increased at such a low temperature or the percentage of sulfur gases in the main air is reduced. As is well known, ore burning is normally carried out at a temperature of about 800, and at any temperature, the formation of sulfates is prevented. During roasting, which occurs during the production of sulphates, it is absolutely necessary to restrain the roasting at a height of 650, and even a temporary increase in the topic should be eliminated, since the sulphates immediately decompose. This is achieved, as is well known, by the fact that all the pods are supplied with air chambers, which, however,

are not in any connection with the oozychos. Through these air chambers, cold air or heated air is passed on demand, and for this purpose they are connected to blowers that allow precise control of the speed of the cooling or heating air. For the economic use of the heat thus obtained, this air can be used to blow into the pods with an already slow response or, respectively, to blow into the discharge watch or into the silo.

Usually, the arrangement of the mixing arms, supported on one side, is still used, which, in view of the unfavorable stress of the material, caused a high and heavy construction, was replaced by an arrangement on supports on two sides, and the advantages of such an arrangement, in the opinion of the visitor, are particularly enhanced due to the application of the rotating system of the ring of levers and the shaft, the more so that this system allows for the known cooling of the stirring levers and the shaft with air, while the ring is kept cold because it is taken out Aruzhu for temperature zone.

The muffle serving for the lowermost hearth is composed of special shaped bricks and, moreover, with the use of an agent exclusively for sealing the joints between the bricks of the binder in such a way that if individual bricks are damaged, it is necessary to remove only the outer bricks in this place in order to undertake a replacement. damaged bricks. After that, the outer bricks are installed again in place, and the repair is completed without any need to resort to disassembling the platforms located above the muffle.

However, it is possible (for zinc-containing pyrites: complex ores, mixed ores, etc.) to also introduce pure pyrite in the powder, for example, in the second underneath in order to cause additional zinc sulfatization at the end of roasting. Such zinc sulphation can, however, also be achieved by introducing, for example,

easily dissolving sulphate, or the chlorinating agent can be directly attached to the last firing stage. But it should always produce one part, for example iron, S as oxides, another part, for example zinc, as sulfate.

The design of the furnace can be arbitrary per se, however it is advisable to adopt round furnaces in which ore is supplied to the upper hearth and passes the furnace through all the downwards, with individual hearths being supplied alternately in the middle and at the outer edge with holes through which the ore falls. On individual sub-ores, the blades, with which the levers of the agitators are supplied, are transferred from the inlet to the outlet, looking at their location, either from the middle to the edges or from the edges to the middle. By placing the number of levers more than two in separate mixers, and due to the possibility created for placing the blades at a greater distance from each other, it is possible to give not all blades of the same feed the same inclination required by moving the ore, but to install separate counter-tilters under opposite inclination. This has the advantage that, due to the counter-working action of these counter-blades, the collection of ore in heaps and, in that place and at the height where it is, is artificially caused in the furnace. In this way, the formation of a thicker layer of ore is achieved at this place, and in connection with this the reduction of the air cushion located above the ore layer; Thanks to this, the above method of splicing proceeds under more favorable conditions.

In FIG. 1 15 shows a furnace in longitudinal section; FIG. 2 - supporting ring B section; FIG. 3 is the same top view; FIG. 4 - the same in a pepen section cut by a stirrer of another construction; FIG. b -11-various options for supporting rods; FIG. 12-ring in another embodiment; FIG. 13-15-installation podderzhiz-ing rings; FIG. 16-25 details

FIG. 26-44-oven in another version and its various parts.

In the proposed mechanical kiln for firing the ore, six motionless hearths 7 are installed above each other (Fig. 1). These layers are interconnected through through holes 2, arranged alternately between the outer circumference of the hearth and now in the middle of those. In the middle of the last hearth, there is an unloading shaft 3, through which the ore falls into the silo 4, the outlet opening is closed by a valve or gate that is not shown in the drawing. When the damper is opened, the ore falls directly into the transport carriage under the silo. The ore is fed through a loading tube b installed on the lid 5 of the furnace, inside which the second pipe 7j is placed at the end with a broadened part, so that a shaft shaped like a ring is obtained. While the pipe 7 is fixed on the upper hearth motionless, the loading pipe 6 can move along the axis. Between the lower edge of this pipe and the upper hearth there remains an annular gap, through which the ore falls on the upper under, and at the same time under the action of the first agitator vanes. By increasing or decreasing the pitch of the ring gap, the height of the layer of ore deposited is adjusted, with appropriate precision needs. Inside pipe 7, a vertical inlet air pipe 8 is installed, which flows through to the second hearth. Under the last hearth, there are heating chambers 9 and JO chambers for preheating the air; these chambers surround the discharge chamber 3. The heating chamber 9 serves to heat the lowermost hearth, while the heating chamber 0 is connected by openings 7 / with the discharge shaft 3, so that the heated air comes directly into contact with the falling ore through these holes . The bottoms are surrounded on the outside by tires 72 and provided with rings 75 of refractory material to protect the latter from the action of radiant heat. In each jib chamber, there is a bash mixer, consisting of a supporting ring J4 provided with a toothed crown; this ring fills the gaps between the rings 72 and the lids of each chamber. To protect against the influence of high temperatures, the support rings M are provided with their inner ring. 14 m of refractory material. Rings J4 are driven by gears 75, all of which sit on a vertical shaft 76 located outside and engage through slots in tires 72 of each hearth with a ring gear M of the ring supporting the arms of the agitators. The levers themselves consist of supporting rods 77, crossing rings / 4 in diameter and fixed to them on both sides. Blades 75 are mounted on the support rods 77, by means of which, as the rings 14 rotate, the ore is mixed and moved either from the middle to the edges or in the opposite direction, depending on the location of the outlet openings. The pipes 23 serve to discharge gases generated during firing.

FIG. 2 and 3 are shown separately in section and in the top view, the supporting ring J4, equipped with a toothed crown, together with the toothed wheel 75 and the stirrer pinch 77 that move it in motion. In order to prevent the weighing of blades J8 consisting of plain flat iron Lever 77, perpendicular to the lever 77 of the support J9. It goes without saying that, if required, several supports can also be installed parallel to each other 19.

FIG. 4 shows an enlarged, cross-sectional view of the supporting ring J4 together with the ring gear so that the structure of its support can be seen. Support tires are attached to the tires 72, on which the two rollers 27 are supported in such a way that the ring 7, freely vras, and between them, is guided from above and below. Rollers 22 at. This is used to center the support ring, so this ring is not. may resist sideways pressure of the teeth of the drive wheel 75.

FIG. Figure 5 shows a different structure of the agitator mechanism, in which the air supplying tube 5 is closed on top, passes through the entire furnace and serves as the middle support for the stirring levers 17. The stirring levers are equally driven here in rotation from an external drive; however, the pipe 5. turns along with them like the middle axis. In this way, an even better support of the throwing levers is achieved, so that these levers can be made weaker. Air is supplied through the openings 24 to the middle openings 2 of the second hearth, so that the cooling air comes in close contact with the falling ore and can produce the greatest possible cooling effect. The ore is fed through a feed funnel b mounted on the furnace lid, while the middle tube 25 serves to divert the furnace basins. Here, too, the lower chamber itself is heated by heating chambers I under which the preheater chamber 10 serves are preheated. Of these latter, the heated air rushes through apertures 7 / into the discharge cavities 3 located here at the outer rim of the lowest hearth.

FIG. B-11 show various examples of supporting rods 17 in cross-section.

FIG. 12 shows another embodiment of the supporting ring 14, which is driven not from the outside by means of a ring gear, but is equipped like a wheel with a hub 27, through which this ring is fixed on the middle air inlet pipe 8, which is designed to lead shaft. The number 77 denotes trailing arms equipped with vanes 18. The numeral 19 denotes spoke-shaped props, which serve to impart greater rigidity.

FIG. 13, 14 and 15 depict the installation of the support rings of FIG. 12. While depicted in FIG. 13, the ring 14 rotates freely, shown in FIG. 14 and 15 are supported at the outer edge by supporting rollers 28, which move along an annular strip 29, or along the hearth.

FIG. 16 shows another embodiment of the levers 77, which are complete here and are provided with a large number of openings so that these levers can be cooled and at the same time used to supply additional air.

FIG. 17 and 18 depict the attachment of the blades 18 to the scaffold levers 77, and for better mixing the lever 17 together with the blades 18 of FIG. 18 is set obliquely.

FIG. 19 shows the shape of the hub 27 mounted on the air inlet pipe 8, this hub is provided here with slots 57 into which the thrower levers 77, shaped, for example, in FIG. b, 9 and 11.

FIG. 20-24 show other forms of the implementation of the agitators. These agitators also consist of support rings 14 provided with toothed rims, but diaphragm-intersecting support ring slats 77 here are formed from round or quadrant shtangs, or from round or non-circular tubes. In FIG. 25 1-IV shows several examples of the implementation of this type of mixing arms. Such a structure, as is particularly evident from FIG. 22 and 24, has the advantage that the blades 75 can be mounted at any desired distance from the center axis, as well as change their angles of inclination, as can be seen in the first example in FIG. 25

FIG. 26 to 43 depict another example of a new calciner in which a broom with a hollow central axis is used. The agitator is set in motion again by using the ring gear and the gear. The air supply pipe 8, which serves as an axis, however, is not used here to directly supply air to the hearth in which the most intensive calcination takes place; but the cooling air passes first through the mixing arms.

then it enters the annular space of the bridge between pipe S and the other pipe 33 surrounding it, and only then enters the air to be cooled below. In order to allow the passage of air along such a path, each of the stirring arms, as can be seen from FIG. 27 and 28, is constituted here of three pipes 34 arranged next to each other, of which middle is connected to pipe 8, and both are external to pipe 33. Air from pipe 8 to middle pipe 34 passes through the end fitting part 35 , changes its direction at the end of the levers and enters the outer coarse 34, and through these last into the annular space between the pipes S and 33. The further path of the air will be explained later. Three parallel pipes 34, which are located next to each other, are put on, alternatingly, the pipes 36 and the vanes 37 as shown in FIG. 29 to 31. Seals 38 are placed between the nozzles and vanes, which prevent the penetration of furnace gases into the voids that remain around the pipes. 34. The connecting or end portion 55 has at the end of the stirring lever a flat portion 39, by means of which the portion 35 is attached to the supporting ring /. A ring gear L is also attached to this flat part. Such an arrangement has the advantage that it makes it possible to simply replace the parts that make up the mixing arms. It is only necessary to remove the connecting part 35 from the supporting ring / 4, and after that it will be possible immediately to pull the entire lever entirely out of the furnace and proceed to the replacement of the damaged parts.

FIG. 34 shows another embodiment of the connection part 55 installed in the calcining chamber. It is especially clearly seen here that both the supporting ring f4 moving along the ball support 4f and the ring gear 40 are attached to the flat part 39, and at the same time all the drive parts are located outside the furnace, where they are completely removed from the influence of the furnace gases and high temperature. A casing 43 and supporting plates 42 are attached to the connecting part 55,

on which the insulating brick masonry 44 is located. Inspection holes 45 are provided in the casing 43. The chamber is isolated from the outer air both at the upper hearth and at the bottom by annular sand seal grooves 46, 47. In the upper sand trough, which rotates with the agitator, the lowering ring 48 is immersed, possibly overblown in vertical pressure. A bottom sheet of the casing 43 is immersed in the lower sand trough 47, which is placed in a stationary hearth. In order to be able, after disconnecting the connecting part 55 from ring 14 and the toothing 40, meshalochny pull lever out of the muffle, the sliding ring 48 podiimaets upwards, and likewise with perestanavlivayuscha in the vertical direction, the front wall 49 of the lower sand {ARD 47 is lowered down.

The middle column consists of tubular fittings 8 and 55, which, as can be seen from FIG. 27 are equal in length to the distance between two adjacent hearths and are joined together by means of uniquely made connecting parts 55 of cast iron. These connecting parts are provided with sleeves into which the tubes 34 are inserted. The pipe 55 is externally protected from the effects of high temperature and furnace gases with a refractory lining. The middle column is maintained, as shown in FIG. 26, with the ball support 8, so that the column can freely rotate together with the stirring arms and serves as a support for these latter.

FIG. 35 and 36 are schematically shown two examples of the implementation of the cooling air pipe supplied through the agitators as shown in FIG. from 26 to 34.

In the exemplary embodiment of FIG. 35, the closed end of the inlet air pipe 8 is located below the lower burning chamber. Therefore, the cooling air from the tube 8 enters the middle tubes 5 of all the mixers and, as described above, flows back through the outer tubes 34 into the annular space between the tubes 8 and 55. In the tube 55, the upper end is closed and, in addition, it is provided between the second and

the third hearth partition 50. From the lower end of the annular space otkr5to. The air entering the annulus from the pancake arms of the two first mixers is driven from here through the holes 24 provided in the outer tube 33 to the second calcining chamber, while the cooling air of the bottom hearth entering the bottom of the annulus is vented down into the discharge channel 3 In addition, a throttle gate 5 / may be installed in the pipe 8 in order to make it possible to precisely control the amount of cooling air entering the lower calcining chambers.

In the exemplary embodiment of FIG. 36, the outer tube 33 is closed both at the top and bottom and provided, as in the previous case, with a partition 50 between the second and the third hearth. The middle tube 8 is open from the bottom, but behind the third hearth, the wall 52 is partitioned off. At the same time as in both the upper hearths, the same phenomenon as in the exemplary embodiment of FIG. 35, in the lower hearths, the cooling air introduced into the third hearth trap after entering the annular space between pipes 8 and 33 first passes into the outer tubes 34 of the lower hearth trader and then returns back to the bottom open pipe 5, from which it is then delivered to the discharge channel 3. In view of the fact that, with such a circulation, the air supplied to the discharge channel 5 passes successively through the bashballs of the two hearths, it heats up stronger, and also rises in view of the greater speed and its cooling effect, which It appears advantageous to the above.

FIG. 37 depicts a calcining furnace in which the lids of the calcining chambers are provided with guide ribs 53 that paralyze the harmful effect of the bulges of the calcining pods and deflect the air passing through the chambers downward to the ore layer. OiiH constrict the free cross section for the prododa of furnace gases and therefore increase the speed of passage of the main air, which, due to the large

kinetic energy comes in closer contact with perekshsk: mi particles of ore, which significantly contributes to roasting. The way of spreading ribs is therefore top-to-bottom of the keeper, which replaces the radiant effect of the furnace.

On fig.38, a pgch kiln is shown, in which it is possible to supply fresh ore to the lower kiln chambers directly through the funnels 54 through snail conveyors 55, in excess of the amount introduced through the feed chamber into the crust: furnace furnace b. as the intensified reaction of the still unburned fresh ore, the temperature of the lower hearths rises, due to which sulfur is removed better from the suspected and already strongly baked ore.

FIG. 39 depicts a calcining kiln, in which in each hearth / air chamber 77 is located. There is no need for these air chambers to be connected to separate calcination chambers. The holes 2 through which the ore falls from the above chambers into the underlying ones are provided with metal collars 78 having the form of short tubular fittings. The air bladders 77 can open at the outer edge of the furnace as desired, and thus communicate with the outside air for better cooling. But they can also be connected, as can be seen from FIG. 39, through tubular fittings 79 with tube 80 extending from the fan. In this case, for diverting injected air, they are connected by fittings 5 / with a collecting pipe 52, which is supplied, for example, with taps 83 and 84, so that with the valve 84 open, air can be vented to the atmosphere, and when this valve is closed and the valve is opened 55 may be diverted to the middle pipe 8 or else to the silo in which the air acts in the manner already described above. It is also possible to connect the air inlet fittings 79 to two pipes running from the fan, one of which serves to supply heated air and the other to supply cold air. This is done to help set

In the fan pipes of the three-way valve, cold or hot air could be introduced into the air chambers as required, and thus the calcining chambers could be either cooled or heated. The bottom of the air chambers 77, which at the same time serves as a lid for the burning chamber under it, may consist of iron plates instead of masonry, because, due to the possibility of precise temperature control, it is not possible to burn them out. The use of metal plates 86 creates, due to the good thermal conductivity of the metal, particularly favorable conditions for heat exchange between calcining and air chambers.

FIG. Figures 40 to 42 illustrate an example of a heating chamber located below the bottom of the bottom itself and used to heat the latter. As can be seen, this chamber consists of a bottom 56 and a cover 57, the distance between which is consistent with the requirements imposed on the furnace. In the middle of the chamber, there is a circular opening 59 surrounded by a clutch 58, which forms a discharge shaft 3 for the ores that are to be covered. Around the outer circumference of the chamber is lined with brickwork 60. In laying 60 there are a number of viewing holes 61. Everything is generally surrounded by a metal casing 62, which consists of several, for example, eight, individual segments. Between the inner wall 58 and the outer wall 60 is placed a concentric ring - partition 63, on some part of which it is provided with openings like a lattice; This ring is made of bricks in different ways. The entire chamber consists of shaped bricks having the shape of annular segments and are assembled in the simplest manner. To keep the shaped bricks forming the cover of the chamber, the second bricks 64, 64 64 of the brickwork 6G 63, 68 located under them can be slightly stretched and then form a support for the freely supported shaped bricks 65, 65 of the cover. In order to better seal against the leakage of combustion gases, the shaped bricks 65, 65 are provided with a ridge and a groove in the side, as shown in FIG. 42. The sun chamber is divided into two symmetrical halves by a partition 66 (Fig. 41). In that part of the bottom of the chamber, which is between the brick rings 58 and 63 ,. the inlet 67 for hot gases rising from the hearth of the furnace. Outlets for these gases can be placed in the portion of the bottom of the chamber that lies between the brick rings 60 and 63. Besides; In the inner ring of the chamber, a partition of a BL is installed; in the outer ring of the chamber, a partition 70. Part of the inner brick ring — partitions 63 of the a – b layer, as shown in the FKG. 41, lattice in order to allow flue gases to pass from one ring of the chamber to another. It is necessary to mention that the brickwork surrounding the inlet and outlet channels 67, 68 ,. consists of shaped bricks of a special shape, as well as the laying of transverse walls 66, 69 and 70 ..

The path traveled by the hot gas; may be, for example, as follows. From located, as usual, under. with a chamber equipped with furnaces of furnaces, hot gases rush from two streams 5 and through the inlet openings 67 67 of both halves of the chamber into the gap between the rings 56 and 63, which are folded from bricks, from here these gases, as indicated by the dotted line, come through a hole 7 / into the outer cavity of the chamber between the brick masonry 60 and 63, then proceed through the lattice part a and and the brick -; the second masonry 63 again into the inner ring of the chamber and from there is diverted through you through the ducts 68 into the chimney.

FIG. 43 and 44 depict two examples of Bypol.nenn channels serving for gaodvodanie blown air into the igniting furnace

false

silage; this is necessary so that during difficult-burning rudehs, for example, with (X deceptions, here, too, an additional distance was taken in direct connection with the kiln. sulfur is not; because of this, such a system is obtained. sulfur ore can be directly subjected to metallurgical processing. At the same time, the advantage is obtained that after burning, sintering of burnt ore is achieved, due to which this latter can be subjected to metallurgical processing in the form of Skov, it represents a particularly desirable when processing fine ores or powder.

In the exemplary embodiment shown in FIG. 43, the ore enters from the upstream kiln through the discharge opening 3 into the underlying silo 4, which is provided at the bottom with a closing valve 73 opening that serves to remove the ore from the silo. The valve 73 is advisable to be controlled by an external lever. A transport cart 72 is placed under the valve 73. The air supplying the blower is supplied in an amount that can be adjusted, in a cold or warm condition under any pressure that is needed, through the tube 75 and from here enters a spiral or coil located on the bottom of the silo 4 and has openings tube 74. Instead of the arrangement shown on the drawing, tube 7- / may also be given another arrangement satisfying the same purpose. For example, it is possible to supply the tube 75, already before entering the chamber, with 4 branches and to pass into the chamber through the bottom a larger number of vertical introduction (air) fittings terminating directly above the bottom.

In order to prevent the ore from getting into the fittings and plugging them, it is advisable to provide these fittings at the upper end with valves, etc. Chamber 4 may be heated, if necessary, by using heating channels.

If a kiln instead of a single discharge opening 3 located on the axis, as can be seen from FIG. 43, has several such openings, which can be, for example, located along the ring at the outer edge of the furnace, then, naturally, for

each hole 3 will need to install separate employees for the sulfur chamber 4.

In the first embodiment shown in FIG. 44, which serves to remove sulfur, chamber 4, although it is also located below the discharge opening 5, but not on the same axis as the kiln, but closer to its outer edge and provided with a valve located on the side. The burnt ore then falls through this valve into the carriage 72, which is standing outside. This design is particularly suitable for larger furnaces with several discharge openings 3, which can be arranged around a circle concentric with respect to the middle axis of the furnace. The warm or cold air supplied here through pipes 75 enters here located on the bottom of the silo 4, having the appearance of grates, parallel pipes 74 and penetrates from these pipes through the holes located on their upper side into the ore located above them. Here, too, the silo 4 may, if necessary, be subjected to heating.

The subject of the patent.

Claims (10)

1.Varification of the mechanical furnace for burning ore according to patent No. 36959, characterized in that the annular space between pipes 8 and 33 forming a double shaft above the second row of agitators is blocked by a partition 50 in order to feed part of the preheated air through the open annular space of the furnace shaft down and the other part of the air through the holes 24 under one of the upper hearths (Fig. 35 and 26) or into the discharge channel in the hearth itself (Fig. 23). 2. The form of the furnace according to claim 1, characterized by using a partition 52 (FIG. 36) in the inner tube 8 of the double shaft above the first row of agitators, with the lower part of the pipe 6 arranged open and the lower part of the pipe 33 closed. 3. The form of the furnace according to claims. 1 and 2, characterized by the use of a throttle gate 5 / for controlling the amount of air supplied through the shaft and the agitators up and down of the furnace (Fig. 36). 4. Video change oven on PP. 1-3, characterized in that the agitator arms are made up of a series of pipes 34 interconnected by means of blades 37, pipes 36 and tips 35 (Fig. 32, 33) with a common connecting cavity for communicating the ends of the pipes. 5. The form of the implementation of paragraphs. 1-4, characterized with the use of tip 55, equipped with flat parts 39, for attaching to support rings M- and for simultaneous installation of a gear ring 40 on them (Fig. 32, 33). 6. The form of the furnace according to paragraphs. 1-5, characterized in that a casing 43 and supporting plates 42 supporting the refractory masonry 44 (Fig. 34) are attached to the connecting parts 35. 7. The form of the furnace according to paragraphs. 1-b, characterized in that the arches of the burning chambers are provided with ribs 57 (Fig. 37). 8. The form of the furnace according to claims. 1-7, characterized by using a heating chamber located below the bottom hearth and heated by the flue gases, consisting of refractory partitions 63, 69, 70, special a-1 masonry, omkijake gas and having a hole 67 for entering the gas chamber and the hole 68 for the OUTPUT of gases in the flue gas burs (Fig. 40-42). 9. The form of the furnace popp. 1-8. characterized in that parts of the blades of one neshalsk of the hearth are directed in the direction opposite to the rest of the agitators. 10. The form of the furnace according to paragraphs. 1-9, distinguished by that. that air chambers 77 are located in separate hearths to maintain the desired temperature. They are connected either with the atmosphere or with pipelines 80 coming from the fan, with air escaping from the air chambers being discharged into the collecting pipe 82. depending on the need to be either released into the atmosphere, or the tube 8 introduced into the inlet air, or into the silo 4 using tubes 75 (Fig. 39, 43, 44). to the dependent patent institute "jjiip3ibi., Basalt Herzrestung, island of ogre. rep. M 40857 fig g- 4 p; ui.schg AV "" Witl- -Mfe M / pI i Vj jUI J-IIL II, I I g Sch 52r; -r :: ±; i; C2ir ::: - .. 15 . - d -, - 1- -, FIG 5 sf iSfpffl -:.C 1 Warj JSij iJj jrLl- {i YLTIBtJ t-J tf b L. LJ -.::--:-7-.- Z GUTT -T-- - G - -.f-r, y-rT f, ./. .... gt .., 4 j- -r-v; -,;, /,:, Ж, 7Г, -, fo .- .b ...- 4: y. X-: :: -, i 1 .., X -: -:: -, 4 . -.-.-.-. 1 UG U dstZg j Cj-mTer tci | i «i-1А.Д |; gJst7 ----- 71 LM ..: ia; i., 2H-4 ; ,, j 14W 1 L ells /xx.Jt-S-a --Xvxx; fkg b figsfig10 1-17. GP Fig.7 Fig 3 tcpi 17  d, and fdd ..   -12 S dependent patent of the firm “Balz Erdrestung”, the company with op), resp. M 40857 ± nrg5  I Ш ± And ЗШ Ш I, 5Я11 LpnrSu G4-g, qinr2d v, - i: 7 l f r & Tt-j --.- j .. -; -y: g: v- -.V .--- I th ss dependent patent mon-coL (luiirb ./o lyt ertrestuig. O-BO with OGR. Ed. D: -iOH5; F-§5 ChZh |. No. If; 1: - S - - f - r s; -: 1si c y ;; y: ;;: ;; f:; :; - .- - -C 4S;: SO C 4- V --- v: -v:.: - 7V:.; - r: .r: -: r ka: fC srisi; f: -; ::: ;;: l - iit: r ±: LjL , V I- i I 1 - -{ one , P L; And li fp, j i-, H r I -; :: ::;: CH. GTN f: i .. „, -. - - -7- f- 5 and gz th f ju  i J 1. 1t ..1-- X - l .rti-i / E depending on the brain f1 W7; -, - ;, i-: JJ pateigu tsn-nop f (rz1y .. Waltz Ertrestung Island with from-), oTiL K 40857 Depend on the patent i-iioii of the company „Balz Erzrestung. with ogre rep. M 40857 .Fig.d - :: ------- t ::,   - /.-i one n t uTskh -; l v-j-D21. , tfrtPC- fci::: - ;. ; -:,: AV; v: i - .: -, ... -1 F ozmizoztu t yigla 57 65 41 .-.four, . ./ patent v of the inn "5 Bali Orcrest International: CL, 1.- / 1 JL: 0-BO C ogre. M 40857