Screw for transportation of solid material with sealing structure and method for producing and utilization of reduced metal

FIELD: sealing structure for solid substance feeding screw, in particular, screw for leveling of basic material and product discharge screw positioned in heating furnace capable of lifting solid substance feeding screw.

SUBSTANCE: drive shaft of solid substance feeding screw is extending within through openings provided within both side walls of heating furnace, and is held on liftable supporting devices positioned at both sides of furnace. Sealing structure has sealing blocks positioned outside the furnace on outer edges of through openings, said sealing blocks circumferentially surrounding said through openings, and movable shields equipped with openings for sliding of drive shaft for screw. Movable shields are brought into contact with sealing blocks through sealing members so as to be moved in vertical planes.

EFFECT: increased efficiency by providing reliable sealing of heating furnace even during operation.

12 cl, 9 dwg

The technical field to which the invention relates.

The present invention relates to a screw for moving solids installed inside the heating furnace, and more specifically, it relates to a sealing structure for auger for moving solids, installed inside the furnace with a movable hearth, for the production of recovered iron by heating and recovery of the charge, which consists of iron oxide and carbonaceous material.

The level of technology

Furnace with a movable hearth (heating furnace) is used for the production of recovered metal (products) by heating and recovery of the oxide mixture (starting material), which includes carbon-containing reducing agent. This furnace with a movable hearth has a leveling screw to evenly space the source material on a hearth of a movable hearth, and has an auger for unloading the product from the furnace. When changing the thickness of the source material in accordance with the operating conditions or when the removal of sludge generated at the hearth of a movable hearth, a leveling auger and auger for unloading during this work must be raised.

When the leveling auger and auger for unloading installed inside the heating furnace, drive unit augers are made outside PE and, to protect the drive unit from a high-temperature atmosphere heating furnace. Therefore, in the side wall of the heating furnace is formed a hole, and the driving shaft continues outside of the furnace through the hole. Because there is a gap formed between the edge of the hole and the drive shaft, the possible release of gas from the furnace or air leaks into the furnace, to prevent these problems require sealing design.

If such a device is a screw type equipped with a lifting device, the relative position between the hole and the drive shaft when lifting screw is changed. Therefore, the sealing structure must be able to follow the change of the relative position between the hole and the drive shaft.

In some cases, the leveling auger having a lifting device, and auger for unloading, with a lifting device in the furnace may be supported by lifting device mounted externally of the furnace with the capability of raising. However, in this design the hole formed in the side wall of the heating furnace, and the driving shaft of the screw can not be moved in the vertical direction, and mechanism for lifting the auger during operation is not compromised.

Disclosure of the invention

The present invention is the creation of a seal design the products of the auger to move solids, located in a heating furnace such as an auger for leveling the material or auger for unloading the product, in which the auger to move the solids can be raised during operation, while supported by the tightness of the heating furnace, and to provide a method of production of the recovered metal, using this sealing structure.

In the first aspect of the present invention relates to a sealing structure that seals the gaps between the heating furnace for heating the solid material and raise the auger to move the solids passing through the side wall of the heating furnace, in which the auger to move the solids have a drive shaft made essentially horizontally, and a spiral blade mounted on the control shaft; drive shaft passes through the through hole of the driving shaft of the screw, which is formed in the side walls of the heating furnace, and each of the through holes has a vertical dimension greater than the diameter of the drive shaft by at least the amplitude of the lifting screw to move solids, where the driving shaft is supported by the raised support device, which is located outside the heating furnace; a sealing blocks attached on the outer edges of the through holes laveuses shaft of the auger so, that surround the periphery of the through-hole from the outside of the heating furnace; and movable guards are located at the outer sides of the sealing units of the furnace, each of the movable plates has an opening slide for sliding the drive shaft of the auger so that the drive shaft extends through the hole of the slide, each of the movable plates can be moved in the vertical direction and between the movable plate and the sealing block is stored tightness.

In this aspect, because the tightness between the sealing blocks and movable plates is saved when their relative vertical position change, the design can be applied to the screw to move the solids, which moves in a relatively large range.

The second aspect of the present invention relates to sealing structures for the auger to move the solids described in the first aspect, further comprising at least one sealing element which surrounds the drive shaft between the respective sealing block and the corresponding movable plate when the movable plate is brought into contact with the sealing unit located between the sealing element.

In this aspect, since the sealing block and the movable flap nevadat in direct contact with each other, the wear on these parts is reduced, and the tightness is maintained even when between these parts is formed a gap due to thermal deformation of the sealing unit and/or the rolling shield.

The third aspect of the present invention relates to sealing structures for the auger to move the solids described in the first aspect, further comprising a sealing device for sealing between the drive shaft and the holes in the slide for sliding the driving shaft of the screw.

In this aspect provided better sealing between the holes of the slide for sliding the drive shaft of the auger and drive shaft.

A fourth aspect of the present invention relates to sealing structures for the auger to move the solids described in the first aspect and further includes a lifting element and a connecting device located outside the heating furnace, in which each of the lifting elements mounted on the respective supporting device and is moved up and down together with the supporting device, and each of the connecting device connects the respective lifting element and the corresponding movable flap.

In this aspect, since the movable plates are supported lifting elements through connecting the disorder and to move up and down, movable flaps do not apply the load to the drive shaft of the auger to move the solids to the sealing elements. As a result, the wear of the leading shaft and sealing elements is reduced and provided with the necessary tightness.

The fifth aspect of the present invention relates to sealing structures for the auger to move solids, described in the fourth aspect, in which each of the connecting device pivotally mounted on the respective lifting element and the corresponding movable flap.

In this aspect, even when the auger to move solids rises and the driving shaft deviates from the horizontal position, the connecting device moves the lifting elements and movable guards.

So between the movable plates and the sealing blocks are securely maintained contact through sealing elements.

The sixth aspect of the present invention relates to sealing structures for the auger to move solids, described in the third aspect, in which the sealing device and the movable plates are connected with the respective bellows expansion joints.

In this aspect, even when the driving shaft of the auger for moving solids substantially declined from the horizontal to the work, the deviation from the axis of the drive shaft and the sealing device is absorbed by the deformation of bellows expansion joints. So good tightness.

The seventh aspect of the present invention relates to sealing structures for the auger to move the solids described in the first aspect, further includes a bias device to bias the movable plates to sealing blocks.

In this aspect, achieved the best tightness between the movable plates and the sealing blocks.

The eighth aspect of the present invention relates to sealing structures for the auger to move solids, described in the second aspect, in which there are two or more of the sealing element, and between the sealing elements is at least one channel for inert gas, intended for the introduction of inert gas.

In this aspect, when the sealing element is made from the inner side of the furnace, the spoils of heat, dust and the like, the sealing element secured blown with an inert gas. Therefore, reliable airtightness.

The ninth aspect of the present invention relates to sealing structures for the auger to move the solids described in the first aspect, in which each of the movable plates with whom holds a combination of many elements of the rolling plate so to auger to move the solids can be separated from the oven when removing part of the elements of the rolling shield.

In this embodiment, because the maintenance of the auger to move the solids can be performed without difficulty, the working time is reduced and productivity is increased.

The tenth aspect of the present invention relates to sealing structures for the auger to move solids, described in the fourth or fifth aspect, in which the lifting elements placed outside the heating furnace, made in one piece with each other.

In this aspect, the driving shaft of the auger to move solids and a support device made outside of the furnace, are moved together. Therefore, even when the drive shaft is deflected from the horizontal position, the supporting device of the drive shaft is not loaded excessively.

The eleventh aspect of the present invention relates to a method of production of the reduced metal by heating and recovering metal oxide mixture comprising carbon-containing reducing agent, and the method includes the steps of feeding the mixture into an oven for heating; alignment layer of a metal oxide mixture, is introduced into the heating furnace during the submission, using an auger for leveling;heating the mixture, evenly laid on the leveling phase, to restore; in which the screw for aligning includes a drive shaft and a spiral blade mounted on the control shaft; drive shaft passes through the through hole of the driving shaft of the screw, which is formed in the side walls of the heating furnace, and each of the through holes has a vertical dimension greater than the diameter of the drive shaft by at least the amplitude of the lift auger for leveling the material, and the drive shaft is supported by the raised anchor devices that are located outside of the heating furnace; a sealing blocks attached on the outer edges of the through-hole for the drive shaft of the auger so, that surround the periphery of the through-hole from the outside of the heating furnace, and the movable plates are located on the outer sides of the sealing units of the furnace, each of the movable plates has an opening slide for sliding the drive shaft of the auger so that the drive shaft passes through the hole of the slide, each of the movable plates can be moved in the vertical direction, and between the movable plate and the sealing unit is supported tightness.

The twelfth aspect of the present invention relates to a method of production of the reduced metal by heating and vos is Stanovlenie metal oxide mixture, includes carbon-containing reducing agent, the method includes the steps of feeding the mixture in a heating furnace for heating metal oxide; heating the metal oxides is introduced into the heating furnace at the stage of filing for recovery; discharging the recovered metal, obtained at the stage of heating, using auger for unloading the product; in which auger for unloading of products includes a drive shaft and a spiral blade mounted on the control shaft; drive shaft passes through the through hole of the driving shaft of the screw, which is formed in the side walls of the heating furnace, and each of the through holes has a vertical dimension greater than the diameter the drive shaft of at least the amplitude of the lift auger for unloading the product, while the driving shaft is supported by the raised anchor devices that are located outside of the heating furnace; a sealing blocks attached on the outer edges of the through-hole for the drive shaft of the auger so that surround the periphery of the through-hole from the outside of the heating furnace, and the movable plates are located on the outer sides of the furnace, each of the movable plates has an opening slide for sliding the drive shaft of the auger so that the drive shaft extends through the hole of the slide, each of moving Sitko which can move in the vertical direction, while between the movable plate and the sealing unit is supported tightness.

Auger for leveling the source material and/or auger for unloading the product can be easily lifted during operation, while the production of recovered metals may continue. Therefore, the source material can uniformly be linked and dispersed into different on the hearth, and the recovered metals can be stably unload. Because sediment can be reliably removed from the hearth, the work can be stabilized over a longer period of time.

As described above, the present invention provides a sealing structure, which allows to raise the auger to move the solids during operation with preservation of the integrity of the heating furnace. In the production process of the reduced metal, the application of the sealing structure according to the present invention the auger for leveling the material and/or auger for unloading the product is extremely useful, because the leakage of gas from the furnace is prevented, and for many hours can always be working with a high energy efficiency, because it prevents the ingress of air into the furnace.

Brief description of drawings

Figure 1(a) presents a view in partial vertical section sealing design the products for the auger to move the solids according to the first variant implementation of the present invention, figure 1(b) is a view in section, taken on line a-a in figure 1(a)and Fig.1(C) is a view in section, taken along the line b-b In figure 1(a).

Figure 2 is a view in partial vertical section of the sealing structure for the screw to move the solids according to the second variant of implementation of the present invention.

Figure 3 is a view in partial vertical section of the sealing structure for the screw to move the solids according to the third variant of implementation of the present invention.

Figure 4 is a view in partial vertical section of the sealing structure for the screw to move the solids according to the fourth variant of implementation of the present invention.

Figure 5 is a view in partial vertical section of the sealing structure for the screw to move the solids according to the fifth variant of implementation of the present invention.

6 is a view in partial vertical section of the sealing structure for the screw to move the solids according to the sixth variant of implementation of the present invention.

Fig.7 is a view in partial vertical section of the sealing structure for the screw to move the solids according to the seventh option from the implementation of this is retene.

Fig is a view in partial vertical section of the sealing structure for the screw to move the solids according to the eighth variant of implementation of the present invention.

Fig.9 is a view in partial vertical section of the sealing structure for the screw to move the solids according to the ninth variant of implementation of the present invention.

Examples of carrying out the invention

Now with reference to the drawings will be described embodiments of in accordance with the present invention.

[The first version of the implementation]

Figure 1 illustrates the sealing structure for the screw to move the solids according to the first variant implementation of the present invention. Here, the reference position is defined as follows: 1 - heating furnace; 2 - side wall of the heating furnace 1; 3 - screw for moving solids; 4 - drive shaft of the screw 3 to move solids; 5 - spiral blade of the screw 3 to move solids; 6 - through hole for the drive shaft of the screw in the side wall 2; 7 - support device; 8 - sealing unit; 9 - movable plate; 10 - hole slide for sliding the drive shaft of the auger in the movable plate 9; 11 - sealing element.

Types of heating furnace 1, which introduced the by the present invention, preferably include, but are not limited to, a furnace with a movable hearth type rotary furnace for heating granular or massive solid materials. For example, the present invention can be applied to the production method of the reduced metal (products), including the restored iron, feeding sintered pieces of metal oxide (source material), for example iron oxide, which includes coal as the carbonaceous reductant, or supplying the source material without agglomeration in the heating furnace 1 and by subsequent heating and recovery of starting material in the heating furnace 1. In the production method of the reduced metal in the heating furnace 1, the screw 3 to move solids has the function of alignment for uniform dispersion of the source material on the hearth, when the source material is fed into the heating furnace 1, and has the function of unloading to unload products. During operation of the screw 3 to move solids auger 3 to move solids should provide lift while maintaining air-tightness between the auger to move the solids and the reheating furnace 1.

As the seal design of the heating furnace 1 according to this variant implementation is equally the th design on both sides in the axial direction of the screw, 1 to 8 depict a design on one side wall 2 of the heating furnace 1 (i.e. the left side in figure 1(a)).

As shown in figure 1(a), in the side wall 2 of the heating furnace 1 is provided by a through hole 6 for the drive shaft of the auger. The screw 3 to move solids (or referred to hereinafter simply as the "auger") passes through a through hole 6 in the side wall 2. The screw 3 is essentially composed of a horizontal drive shaft 4 and the helical blades 5 mounted on the control shaft 4. Drive shaft 4 passes through the through hole 6 in the side walls 2 and the protruding shaft ends protruding beyond the side walls 2, are supported on the respective raised base device 7 arranged outside the heating furnace 1. Each of the supporting device 7 has a shaft bearing (not shown) for supporting the drive shaft 4. Support device 7 are driven by energy, such as oil pressure, water pressure and electricity to raise the driving shaft 4.

A through hole 6 for the drive shaft of the auger has a vertical dimension greater than the diameter of the drive shaft 4 at least on the amplitude of the lifting screw 3 (stroke in the vertical direction)so that the screw 3 (drive shaft 4) could be lifted in a predefined range.

As shown in figure 1(b), upl is tritely unit 8 attached to the outer edge 6A of the through-hole 6 to the drive shaft of the auger so, what surrounds the periphery of the through hole 6. The movable plate 9 is located on the outer side of the sealing unit 8 of the furnace. The movable plate 9 has an opening 10 slides for sliding the driving shaft of the screw, and thus the driving shaft 4 passes through the opening slide. The inner diameter of the hole 10 slip slightly larger than the outer diameter of the drive shaft 4, to facilitate the rotation of the driving shaft 4.

As shown in figure 1(a), the sealing unit 8 has a recess on the outer front surface for attaching the sealing element 11 consisting, for example, of an annular nozzle with heat-resistant gasket and sealing element 11 is inserted into the recess. The recess surrounds the hole 10 and is, for example, an elliptic shape. The movable plate 9 is displaced relative to the sealing unit 8, in the place where it is attached to the sealing element 11 so that the movable plate 9 has been brought into contact with the sealing unit 8 and was still moving in the vertical direction. Since the sealing element 11 can be fixed, so that between the sealing unit 8 and a movable plate 9 is supported seal, fastening of the sealing element 11 to the sealing unit 8 or to the rolling plate 9 is not limited ways of setting the sealing element 1 in the recess, and the recess can be formed.

The movable plate 9 during sliding in the vertical direction maintains contact with the entire area of the annular sealing element 11. Therefore, as shown in figure 1(C), the movable plate 9 must be of sufficient size that exceeds the stroke in the vertical direction.

To prevent thermal deformation of the sealing unit 8, the area surrounding the through hole 6 to the driving shaft of the screw on the side wall 2 of the heating furnace 1, preferably has a heat insulating structure formed of refractory material, heat insulating material and the like, or has a system of panels with water cooling. The movable plate 9 preferably has an internal water cooling system, to prevent poor sealing characteristics, which is caused by thermal distortion in contact the front surface 9a of the rolling plate 9 relative to the sealing element 11.

As shown in figure 1(b), in this embodiment, to the sealing unit 8 is attached one (only) of the annular sealing element 11. However, for a reliable sealing can use many of sealing structures containing two or more sealing elements 11 installed in sealing the flax unit 8.

In this embodiment, the sealing element 11 is attached to the sealing unit 8. Alternatively, the sealing element 11 can be attached to the moving plate 9. When the sealing element 11 is attached to the moving plate 9, the sealing element 11 is moved simultaneously with the sliding of the movable plate 9 in the vertical direction. Therefore, the sealing unit 9 must be large enough in the vertical direction to maintain contact with the entire area of the sealing element 11. Therefore, the sealing element 11 attached to the sealing unit 8, as shown in this embodiment, is preferred from the viewpoint of cost.

In this embodiment, the sealing element 11 is made between the sealing unit 8 and a movable flap 9. However, when the pressure and the temperature in the furnace is not so high and the necessary seal is supported by a simple contact between the sealing unit 8 and a movable plate 9, the sealing element 11 is not required.

As the seal design for the screw 3 to move solids under option exercise allows you to change the vertical relative position between the sealing unit 8 and a movable flap 9 when saved in the sucharittanonta, the screw 3 to move the solids can be moved in a relatively large range. Sealing design provides for the operation of the furnace for a long time with high safety without leakage of gas from the inner part of the furnace and with high efficiency without leakage of air into the furnace.

Since the screw to align the source material and/or auger for unloading the product can be easily lifted during operation, the production of recovered metals can be continuous. Therefore, the source material can uniformly be linked and dispersed into different on the hearth, and the recovered metals can be stably unload. Because residue on the hearth can be reliably removed, possible sustainable mode of operation for a long period of time.

In this embodiment, since the sealing element 11 is inserted between the sealing unit 8 and a movable plate 9, the sealing unit 8 and the movable plate 9 is directly in contact with each other are not included. Consequently, the wear on these parts is reduced, and there may be a sufficient seal, even when between these parts is formed a gap due to thermal deformation of the sealing unit 8 and/or rolling of the plate 9.

[Second variant implementation]

Figure 2 illustrates the sealing structure for the screw 3 to move t Agogo substances according to the second variant of implementation of the present invention. In the sealing device 13, according to the second variant implementation, the gap between the hole 10 slides for sliding the drive shaft of the auger and drive shaft 4 of the screw 3 in the first embodiment, sealed with sealing element 14 of the shaft.

As described in the first embodiment, when the inner diameter of the hole 10 slides for sliding the driving shaft of the screw is slightly greater than the diameter of the drive shaft 4 of the screw 3, to facilitate the rotation of the driving shaft 4, is essentially guaranteed seal. When you need more air-tight seal, for example, when the differential pressure between the interior of the furnace and the atmosphere is great, it is preferable for the sealing device 13, shown in figure 2.

As shown in figure 2, the sealing device 13 includes, for example, the sealing element 14 of the shaft, type cylindrical stuffing nozzle and an annular V-shaped seal, and the support element 13A to maintain the sealing element 14 of the shaft. The sealing element 14 of the shaft has an internal diameter to facilitate the rotation of the driving shaft 4, and has a thickness to seal the gap between the hole 10 and the drive shaft 4. The space through which the sealing element 14 of the shaft continues, the speed decreases to the inner end (internally to the part of the furnace), and the support element 13A is blocking the outer end of the sealing element 14 of the shaft from the protrusion from the inner end of the period (the inner part of the furnace)to the sealing element 14 of the shaft is not deviated in the axial direction during the rotation of the driving shaft 4.

In this embodiment, the sealing device 13 ensures tightness between the hole 10 slides for sliding the drive shaft of the auger and drive shaft 4, and the desired seal is maintained even when a large pressure differential between the interior of the furnace and the atmosphere.

Other structures, functions and advantages are the same as in the first embodiment.

[Third option exercise]

Figure 3 illustrates the sealing structure for the screw 3 to move the solids according to the third variant of implementation of the present invention. A third option implementation differs from the second version of the implementation that is provided by the lifting element 16, which is fixed on the supporting device 7 and is moved up and down together with the supporting device 7, and the connecting device 17, which connects the lifting element 16 with a movable flap 9.

As shown in figure 3, the lifting element 16 includes, for example, a frame consisting of a longitudinal element 16A and transverse 16b. The transverse element 16b is made above the heating furnace 1, a longitudinal element 16A is made on the side of the heating furnace 1, and the longitudinal element 16A and the transverse element 16b are connected together. The longitudinal element 16A is fixed on the supporting device 7.

The connecting device 17 mounted on the transverse element 16b and continues down. The movable plate 9 is suspended from the lower end of the strip connection devices 17. The length of the connecting device 17 is determined so that the movable plate 9 is not loaded drive shaft 4 with its weight.

In this embodiment, since the movable plate 9 is supported by a lifting element 16 through the connecting device 17 and is moved up and down in this supported state, the movable plate 9 does not load the driving shaft 4 of the screw 3 to move the solids and the sealing element 11 with its weight. As a result, the wear of the driving shaft 4 and the sealing element 11 is reduced, and the necessary seal.

Other structures, functions and advantages are the same as in the second embodiment.

[Fourth option exercise]

Figure 4 illustrates the sealing structure for the screw 3 to move the solids according to the fourth variant of implementation of the present invention. In the third embodiment, the implementation of the of the connecting device 17 has a rigid joint design. In the fourth embodiment, the connecting device 17 via a hinge connection pivotally mounted on the lifting element 16 and the movable plate 9. The upper end of the connecting device 17 pivotally mounted on the transverse element 16b of the lifting element 16, and the lower end of the connecting device 17 pivotally mounted on the movable plate 9.

In the shown figure 3 structure according to the third variant of implementation, the lifting element 16 and the movable plate 9 are rejected through the connecting device 17, when the driving shaft 4 deviates from the horizontal position. However, the sealing unit 8 is not tilted, because it is fixed to the side wall 2 of the heating furnace. As a result, between the sealing element 11 of the sealing unit 8 and in contact outer surface 9a of the rolling plate 9 can be easily formed between, and adequate compaction cannot be achieved.

On the other hand, in this fourth embodiment, as shown in figure 4, the slope of the lifting element 16 does not affect the connecting device 17 due to the use of hinge joints. Therefore in contact with the front surface 9a of the rolling plate 9 moves independently relative to the drive shaft 4, when the driving shaft 4 is inclined, and the seal between between the asasa in contact with the front surface 9a and the sealing element 11 is provided constantly. As a result, even when the driving shaft 4 deviates from the horizontal position in accordance with the lifting screw 3 to move solids, the necessary seal between the sealing element 11 and are in contact with the front surface 9a of the rolling plate 9 can be highly reliable.

Other structures, functions and advantages are the same as in the third embodiment.

[Fifth variant implementation]

Figure 5 illustrates the sealing structure for the screw 3 to move the solids according to the fifth variant of implementation of the present invention. In the fourth embodiment, the sealing device 13 is directly fixed on the hole 10 slides for sliding the drive shaft of the auger movable flap 9. In this fifth embodiment, the sealing device 13 is connected with a movable flap 9 with bellows compensator 18.

Shown in figure 4 structure according to the fourth variant implementation, the movable plate 9 is pivotally mounted on the lifting element 16 through the connecting device 17, and the supporting element 13A of the sealing device 13 is fixed directly to the movable plate 9. Therefore, even when the driving shaft 4 is deflected from the horizontal position in contact the front surface is th 9a movable flap 9 is essentially not tilted, and sealing device 13 is essentially not tilted. As a result, when the driving shaft 4 is inclined, is offset from the center between the sealing device 13 and the drive shaft 4. When the angle of inclination of the driving shaft 4 from the horizontal position is relatively small, the sealing element 14 of the shaft is deformed, absorbing the deviation from the centre, and supported by the necessary seal between the movable plate 9 and the drive shaft 4. However, when the angle is large, the sealing element 14 of the shaft cannot absorb the deviation from the center due to restrictions within a reasonable range of deformation of the sealing element 14 of the shaft. As a result, the driving shaft 4 may be excessively loaded.

On the other hand, in the embodiment shown in figure 5, since the sealing device 13 and the movable plate 9 is connected with retractable bellows compensator 18, the deviation from the center can be absorbed by deformation of the bellows compensator 18, even when the angle is large. Therefore, the tightness greatly improved. In addition, it is possible to avoid excessive loading of the drive shaft 4.

When the driving shaft 4 rotates, the sliding friction of the sealing device 13 causes the torsion of bellows compensator 18. This can damage the bellows compensator 18. So between the movable plate 9 of the sealing device 13 preferably has a friction shock absorber (not shown) to absorb friction, order directly on the bellows compensator 18 torsion was not made.

Other structures, functions and advantages are the same as in the fourth embodiment.

[Sixth variant implementation]

6 illustrates a sealing structure for auger 3 to move the solids according to the sixth variant of implementation of the present invention. In this sixth embodiment, is provided for shifting device 19 to bias the movable plate 9 to the sealing unit 8.

As shown in Fig.6, bias device 19, for example, is fixed on the longitudinal element 16A of the lifting element 16. Bias device 19 moves the front surface that faces the furnace, rolling plate 9 to the sealing unit 8, using driving force, such as hydraulic pressure and air pressure or force of the compression springs (not shown). Preferably the driving shaft 4 is surrounded by numerous shifting device 19 so that the movable plate 9 is equally shifted relative to the sealing unit 8.

In the sixth embodiment, since the bias device 19 is provided to bias the movable plate 9 to the sealing unit 8, guaranteed better sealing between the movable plate 9 and the sealing unit 8.

Other structures, functions, and mainly who define the company are the same as in the third embodiment.

[Seventh variant implementation]

7 illustrates a sealing structure for auger 3 to move the solids according to the seventh variant of implementation of the present invention. In the seventh embodiment, the sealing unit 8 are mounted two annular sealing element 11 and 11' and a channel 20 of inert gas for introduction of inert gas into the space between the two sealing elements 11 and 11'. Exhaust channel 20 for inert gas is provided in the sealing unit 8.

As shown in Fig.7, two annular recesses formed on the front surface that faces the exposed front surface 9a of the rolling plate 9, the sealing unit 8. Sealing elements 11 and 11' are without a gap in the annular grooves, respectively. In this embodiment, the inner sealing element 11 facing the inner part of the furnace and the outer sealing element 11' is turned to the outer part of the furnace. The outlet 22 of the channel 20 for inert gas used to purge the inert gas is formed between the two annular grooves. As an example, the inert gas preferably using nitrogen under pressure.

In this seventh embodiment, when the sealing ele is UNT 11, located on the inner side (facing the inner part of the furnace), the spoils of heat, dust and the like, and when the characteristic of the seal between the sealing element 11 and are in contact with the front surface 9a of the rolling plate 9 is reduced, the inert gas under pressure is blown into the furnace through the area in which the characteristic of the seal is reduced. As a result, supported seal between the outer part and the inner part of the furnace, and further deterioration of the sealing elements 11 and 11' is prevented. In this embodiment, there are two sealing element 11 and 11', but the number of sealing elements is unlimited. Can be mounted in three or more sealing elements 11, 11' and the like, and the outlet port for the inert gas can be performed in each space between each sealing element 11, 11', etc.

Other structures, functions and advantages are the same as in the second embodiment.

[Eighth variant implementation]

Fig illustrates a sealing structure for auger 3 to move the solids according to the eighth variant of implementation of the present invention. The movable plate 9 in this eighth embodiment, consists essentially of a combination of two elements 9a and 9b of the rolling shield. In the eighth embodiment, on which westline, because some elements of the rolling plate (item 9b of the rolling plate are removable during maintenance auger 3 to move the solids can be easily removed from the heating furnace 1.

As shown in Fig, inner hole diameter item 9a of the rolling plate is approximately the same as the outer diameter of the element 9b of the rolling plate and larger than the outer diameter of the helical vane 5 of the screw 3.

Using this design element 9b movable flap can be separated from the drive shaft, and the helical vane 5 of the screw 3 can pass through the hole element 9a of the rolling shield. Therefore, the screw 3 can be easily removed from the heating furnace 1.

Therefore, in the eighth embodiment, because the maintenance of the screw 3 to move solids can easily be performed, hours of work are reduced and productivity is increased.

Element 9b of the rolling plate may be a single annular component, or can be two separate components. Such releasable design element 9b of the rolling plate can be easily attached to the drive shaft 4 of the screw 3 and remove it. Therefore, manufacturability additionally increases.

Other structures, functions and advantages are the same as in the first embodiment Khujand is the implementation.

[Ninth variant implementation]

Fig.9 illustrates a sealing structure for auger 3 move the solids according to the ninth variant of implementation of the present invention. In the ninth embodiment, the lifting elements 16, which are located on both sides of the heating furnace 1, as shown, for example, in figure 3, illustrating a third variant of implementation, made in one piece with each other.

As shown in Fig.9, the lifting elements 16 on both sides of the furnace are preferably United by transverse element 16b. The longitudinal elements 16A are connected with both ends of cross member 16b, forming a shaped flap lifting element 16.

Reference unit 7 and the actuator 21 of the rise of the connected pin. The pin preferably extends through hole for insertion of the pin, which has an elliptic shape with a large diameter in the horizontal direction. With this design, even when the driving shaft 4 of the screw 3 move solids inclined and horizontal distance between the supporting device 7 on the two sides (between the shaft bearings on the two sides) is changed, the change in horizontal distance between two control devices can be absorbed by the connecting construction of the two actuators 21 of the lift.

Therefore, in the ninth embodiment, implementation is tvline, since the driving shaft 4 and the bearing device 7 of the drive shaft 4 located on both outer sides of the furnace, move as a single unit, a support device 7 is substantially not loaded, even when the driving shaft 4 of the screw 3 move solids deflected from the horizontal position.

Other structures, functions and advantages are the same as in the third embodiment.

Industrial applicability

As described above, the present invention can be applied to seal the gaps between the through holes of the drive shaft of the auger heating furnace and raise the auger to move the solids placed in a heating furnace for heating the solid materials.

1. Sealing structure for sealing between a microwave for heating the solid material and raise the auger to move the solid material passing through the side walls of the heating furnace, while the auger to move the solid substance contains a drive shaft made essentially horizontally, and a spiral blade mounted on the control shaft, and drive shaft passes through the through hole of the driving shaft of the screw, which is formed in the side walls of the heating furnace, and each of the through holes has a vertical dimension exceeding di the meter drive shaft of at least the amplitude of the lifting screw to move the solid material, moreover, the driving shaft is supported by the raised anchor devices that are located outside the heating furnace, the design provides sealing blocks attached on the outer edges of the through-hole for the drive shaft of the auger, which surround the through hole from the outside of the heating furnace on the periphery, and the movable plates located on the outer sides of the sealing units of the furnace, each of the movable plates is made with a hole to slip the drive shaft of the auger and drive shaft passes through the hole, each of the movable plates arranged to move in a vertical direction between the movable plate and the sealing unit maintains the seal.

2. Sealing structure according to claim 1, additionally containing at least one sealing element which surrounds the drive shaft and located between the respective sealing block and the corresponding movable plate when the movable plate is brought into contact with the sealing unit located between the sealing element.

3. Sealing structure according to claim 1, additionally containing a sealing device for sealing between the drive shaft and the holes for the slip of the driving shaft of the screw.

4. Sealing structure according to claim 1 additionally containing the lifting elements and the connecting device, outside the heating furnace, each of the lifting elements mounted on the respective supporting device and is arranged to move up and down together with the supporting device, and each of the connecting device connects the respective lifting element and the corresponding movable flap.

5. Sealing structure according to claim 4 in which each of the connecting device pivotally mounted on the respective lifting element and the corresponding movable flap.

6. Sealing structure according to claim 3, in which the sealing device and the movable plates are connected with the respective bellows expansion joints.

7. Sealing structure according to claim 1, additionally containing a shifting device for shifting the movable plates to sealing blocks.

8. Sealing structure according to claim 2, in which there are two or more of the sealing element and at least one channel for inert gas, intended for the introduction of inert gas and located between the sealing elements.

9. Sealing structure according to claim 1, in which each of the movable plates contains a combination of many elements movable plate, whereby the screw is made with the possibility of removal from the oven when removing part of the rolling elements o the TKA.

10. Sealing structure according to claim 4 or 5, in which the lifting elements placed outside the heating furnace, made in one piece with each other.

11. The production method of the reduced metal by heating and recovering metal oxide mixture comprising carbon-containing reducing agent, containing the steps of feeding the mixture into an oven for heating, alignment of the charge introduced into the heating furnace at the stage of filing with the auger to move the solid material, and heating the mixture, evenly laid on the leveling phase, to restore, in which the auger to move the solid material contains a drive shaft and a spiral blade mounted on the control shaft, the driving shaft passes through the through hole of the driving shaft of the screw, which is formed in the side walls of the furnace, each of the end-to-end hole has a vertical dimension greater than the diameter of the drive shaft by at least the amplitude of the lifting screw to move the solid material, and a drive shaft support raise anchor devices that are located outside the heating furnace, and additionally provided with a sealing blocks attached on the outer edges of the through-hole for the drive shaft of the auger and surrounding the through hole from the outside heat is positive on the periphery of the furnace, and movable plates located on the outer sides of the sealing units of the furnace, each of the movable plates has a hole to slip the drive shaft of the auger and drive shaft passes through the hole, each of the movable plates arranged to move in a vertical direction between the movable plate and the sealing unit maintains the seal.

12. The production method of the reduced metal by heating and recovery equisignal metal mixture that includes carbon-containing reducing agent, containing the steps of feeding the mixture into an oven for heating, the heating of the charge introduced into the heating furnace at the stage of filing for recovery, and discharge of recovered metal, obtained at the stage of heating by means of a propeller to move the solid material in which the screw to move the solid material contains a drive shaft and a spiral blade mounted on the control shaft, the driving shaft passes through the through hole of the driving shaft of the screw, which is formed in the side walls of the furnace, each of the end-to-end hole has a vertical dimension greater than the diameter of the drive shaft by at least the amplitude of the lifting screw to move the solid material, and a drive shaft support raise anchor the device, located outside the heating furnace, and is provided by the sealing blocks are attached on the outer edges of the through-hole for the drive shaft of the auger so that surround the periphery of the through-hole from the outside of the heating furnace, and the movable plates located on the outer sides of the sealing units of the furnace, each of the movable plates has a hole to slip the drive shaft of the auger and drive shaft passes through the hole, each of the movable plates arranged to move in a vertical direction between the movable plate and the sealing unit maintains the seal.