CN107036441A - Rotary hearth furnace - Google Patents

Abstract

The invention discloses a kind of rotary hearth furnace, the rotary hearth furnace includes：Body of heater, siege, burner and the turn-down rig of annular.Furnace chamber is limited in the body of heater；The siege is located in the furnace chamber, and the siege horizontally rotates around the central axis of the body of heater；The burner is located on the body of heater；The turn-down rig includes the stirring part for being used to dig material on the siege, and the stirring part is located in the furnace chamber and positioned at the top of the siege.Rotary hearth furnace according to embodiments of the present invention, by setting stirring part on siege top, during material movement, stirring part can be stirred to material, so that levels material scattering rearrangement, uniform heating of the heater to material is realized, so as to improve the production efficiency and product quality of rotary hearth furnace.

Description

Rotary hearth furnace

Technical field

The present invention relates to metallurgical heat-processing equipment field, more particularly to a kind of rotary hearth furnace.

Background technology

In metallurgical heat-processing equipment field, rotary hearth furnace heating reduction apparatus be in reducing and smelting technique processing steel mill it is useless it is solid, The nucleus equipment of copper ashes, aluminium slag etc..The core component of rotary hearth furnace is that can carry out ring-like plane siege in rotary moving, and outside siege Side and furnace roof have furnace shell and refractory material protection.In process, pavier blanking is passed through so that siege is paved with material, stove Body is heated provided with fuel burner nozzle heater to material of the paving cloth on siege.Each stove is controlled by controlling air-fuel ratio The also Primordial Qi part of section, by radiation, convection current, heat transfer is heated and reducing material.According to the difference of technique, the highest of material is heated Temperature is up to 1400 DEG C.

From being described above, material is geo-stationary in heating process, and heater is provided only on siege top, Mode of heating is mainly by radiation, convection current, conduction.But it is due to that material can all have certain thickness afterwards on paving cloth to siege Degree, this upper strata of material can be caused to be received within the unit interval heat is more, lower floor's material is covered by upper materials, receives heat Few, material is heated unbalanced, and chemical reaction degree difference drastically influence product quality, or even produce a large amount of waste products.

The content of the invention

It is contemplated that at least solving one of technical problem present in prior art.Therefore, the present invention proposes a kind of turn Bottom stove, the rotary hearth furnace can be uniformly heated up to material, improve production efficiency and product quality.

Rotary hearth furnace according to embodiments of the present invention includes：Furnace chamber is limited in the body of heater of annular, the body of heater；Siege, institute State siege to be located in the furnace chamber, the siege horizontally rotates around the central axis of the body of heater；Burner, the burner is located at On the body of heater；Turn-down rig, the turn-down rig includes：Stirring part for digging material on the siege, the stirring Part is located in the furnace chamber and positioned at the top of the siege.

Rotary hearth furnace according to embodiments of the present invention, by setting stirring part on siege top, during material movement, is turned over Materials and parts can be stirred to material so that the material of lower floor translates into upper strata, realize uniform heating of the heater to material, from And improve the production efficiency and product quality of rotary hearth furnace.

In certain embodiments, the turn-down rig is multiple, and multiple turn-down rigs are around the center of the body of heater Axis, which is spaced apart, to be set.Thus, it is spaced apart around the center of body of heater and multiple stirring parts is set so that material is deposited in motion process In multiple stirring positions, i.e., multiple stirring is have passed through during material movement, so can further improve the heated equal of material Evenness, reaches the purpose of the production efficiency and product quality that improve rotary hearth furnace.

Specifically, multiple burners are provided between every two neighboring turn-down rig.Such design can ensure material After a stirring part is stirred, it is immediately heated, so can further improves the degree of being heated evenly of material, reach that raising turns bottom The production efficiency of stove and the purpose of product quality.

In certain embodiments, the turn-down rig includes：Rotary shaft, the rotary shaft is located on the body of heater, described Stirring part is located in the rotary shaft；Drive mechanism, the drive mechanism is connected to drive the rotary shaft with the rotary shaft Rotate.Drive mechanism driving rotary shaft rotation, such design can increase the stirring effect of stirring part, further increase material Heated uniformity coefficient, so as to improve production efficiency.

Specifically, the drive mechanism is located at the outside of the body of heater, is connected between the rotary shaft and the body of heater Sealing mechanism for shaft end.Axle end sealing device can ensure because the pernicious gas that the chemical/physical reaction of material is produced will not expand It is scattered to outside body of heater.

In certain embodiments, the minimum range of the stirring part and the siege is 10-15mm.Stirring part and siege it Between presence 10-15mm gaps, stirring part can be avoided to scratch siege during stirring, cause the abrasion of stirring part.

In some optional embodiments, the stirring part includes：Linkage section and two active sections, the linkage section connection In the rotary shaft, described two active sections are located at the both sides of the linkage section, every in the rotation direction of the rotary shaft The individual active section is directed away from the direction extension of the rotary shaft.Such structure enables to stirring part preferably to rise The effect of material is turned over to plough.

Specifically, in the rotation direction of the rotary shaft, the front end of two active sections is connected, two work The rear end of section extends rearwardly towards direction away from each other.

More specifically, the side of the neighbouring rotary shaft of the rear end of each active section is provided with breach.

In some optional embodiments, the cooling duct for flowing cooling agent is limited in the rotary shaft, it is described Cooling duct rotary shaft described in insertion on the axial direction of the rotary shaft, the two ends of the rotary shaft are connected to rotation Joint.Thus, during turn-down rig works, cooling agent ceaselessly flows in the cooling duct of rotary shaft, to rotating Axle and stirring part play a part of cooling protection.

The additional aspect and advantage of the present invention will be set forth in part in the description, and will partly become from the following description Obtain substantially, or recognized by the practice of the present invention.

Brief description of the drawings

The above-mentioned and/or additional aspect and advantage of the present invention will become from description of the accompanying drawings below to embodiment is combined Substantially and be readily appreciated that, wherein：

Fig. 1 is the sectional view of rotary hearth furnace according to embodiments of the present invention.

Fig. 2 is that Fig. 1 circle shows the zoomed-in view at A.

Fig. 3 is the partial structural diagram of rotary hearth furnace according to embodiments of the present invention.

Fig. 4 is turn-down rig structure chart according to embodiments of the present invention.

Fig. 5 is Fig. 4 A to sectional view.

Fig. 6 is Fig. 4 B to sectional view.

Fig. 7 is the front view of stirring part according to embodiments of the present invention.

Fig. 8 is the left view of stirring part according to embodiments of the present invention.

Fig. 9 is the top view of stirring part according to embodiments of the present invention.

Figure 10 is the stereogram of stirring part according to embodiments of the present invention

Figure 11 is the partial top view of rotary hearth furnace according to embodiments of the present invention.

Reference：Rotary hearth furnace 200, body of heater 1, furnace chamber 11, water seal arrangement 12, siege 2, burner 3b, turn-down rig 4, turn over Materials and parts 41, linkage section 411, active section 412, breach 413, rotary shaft 42, shaft end seal 421, fixing seal end cap 421a, slip End cover 421b, outer end cap 421c, inner end cap 421d, sealing material 421e, drive mechanism 43, screw lifting mechanism 44.

Embodiment

Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached The embodiment of figure description is exemplary, is only used for explaining the present invention, and is not considered as limiting the invention.

Rotary hearth furnace 200 according to embodiments of the present invention is described below with reference to Fig. 1-Figure 11.

As shown in Figure 1, shown in Figure 11, rotary hearth furnace 200 according to embodiments of the present invention includes the body of heater 1, siege 2, burner of annular 3b and turn-down rig 4.Wherein, furnace chamber 11 is limited in body of heater 1, siege 2 is located in furnace chamber 11, siege 2 is around the center of body of heater 1 Axis horizontal is rotated, and burner 3b is located on body of heater 1.Turn-down rig 4 includes the stirring part 41 for being used to dig material on siege 2, turns over Materials and parts 41 are located in furnace chamber 11 and positioned at the top of siege 2.

It is understood that in the operation process of rotary hearth furnace 200, siege 2 can drive material in the rotation of rotary hearth furnace 200 Heart line is moved, and the rotation centerline of rotary hearth furnace 200 is vertically arranged, and siege 2 is moved in the horizontal plane.In the moving process of siege 2, position Stirring part 41 in the top of siege 2 can dig the material of lower section, material loosening be stirred so that burner 3b can be uniformly right Spread material of the cloth on siege 2 to be heated, material is heated evenly, and the chemical reaction of material can be also sufficiently carried out, and is improved The quality of product, and improve the production efficiency and product quality of rotary hearth furnace 200.

Rotary hearth furnace 200 according to embodiments of the present invention, by setting stirring part 41 on the top of siege 2, in material movement During, ploughed to turn over when material passes through stirring part 41 and broken up.Bottom is dug, and upper strata falls, and is conducive to further by thermal response, Uniform heating of the heater to material is realized, so as to improve the production efficiency and product quality of rotary hearth furnace 200.

In certain embodiments, as shown in figure 11, the top of siege 2 can set multiple turn-down rigs 4.And multiple stirring dresses Put 4 central axis for surrounding body of heater 1 and be spaced apart setting.

Multiple stirring parts 41 are set it should be noted that being spaced apart around the center of body of heater 1 so that material is in motion process In there are multiple stirring positions, i.e., multiple stirring is have passed through during material movement, so can further improve material by The hot uniformity, reaches the purpose of the production efficiency and product quality that improve rotary hearth furnace 200.

Specifically, as shown in figure 11, multiple burner 3b are provided between every two neighboring turn-down rig 4.It is understood that Material is after feed opening spreads cloth to rotary hearth 2, by several burner 3b heating responses, and upper materials reaction is completed, through turning over The material plough of device 4, which is turned over, to be broken up, upper materials and lower floor's material rearrangement, then by several burner 3b heating responses, according to technique With layer thickness so repeatedly.Treat that material is all heated evenly, reaction completes most to discharge body of heater 1 through drawing mechanism afterwards.Therefore this The design of sample can further improve the degree of being heated evenly of material, reach the production efficiency and product quality for improving rotary hearth furnace 200 Purpose.

In some optional embodiments, as Figure 1 and Figure 4, turn-down rig 4 includes rotary shaft 42 and drive mechanism 43. Wherein, rotary shaft 42 is located on body of heater 1, and stirring part 41 is located in rotary shaft 42, and drive mechanism 43 is connected to drive with rotary shaft 42 Dynamic rotary shaft 42 is rotated.It is understood that the driving of drive mechanism 43 rotary shaft 42 rotates, such design can increase stirring The stirring effect of part 41, the uniformity coefficient that further increase material is heated, so as to improve production efficiency.And when drive mechanism 43 Power source when being variable frequency reducer motor, can be by the running frequency of regulation motor according to the movement velocity of material on siege 2 The purpose of the rotary speed of regulation stirring part 41 is reached, so as to further improve product quality.

Specifically, as Figure 1 and Figure 4, drive mechanism 43 is located at the outside of body of heater 1, connects between rotary shaft 42 and body of heater 1 It is connected to the mechanism of shaft end seal 421.The device of shaft end seal 421 can ensure due to being harmful to that the chemical/physical reaction of material is produced Gas is not diffused into outside body of heater 1.

Specifically, stirring part 41 is bolted in rotary shaft 42.Stirring part 41 is bolted in rotary shaft On 42, the installation and removal of stirring part 41 can be readily achieved, you can easily to carry out the maintenance and replacing of stirring part 41.

Specifically, the cooling duct for flowing cooling agent is limited in rotary shaft 42, cooling duct is in rotary shaft 42 Insertion rotary shaft 42 on axial direction, the two ends of rotary shaft 42 are connected to swivel joint.It is understood that in stirring dress During putting 4 work, cooling agent ceaselessly flows in the cooling duct of rotary shaft 42, to rotary shaft 42 and stirring part 41 To the effect of cooling protection.

Certainly, turn-down rig 4 can also be other forms, for example, directly stirring part 41 is connected on body of heater 1, material exists Turned in rotary course by the plough of stirring part 41, in another example, stirring part 41 is connected in rotary shaft 42 first, then rotary shaft 42 is put The top of siege 2 is placed in, material is turned in rotary course by the plough of stirring part 41.

Additional description is needed, turn-down rig 4 has point of passive stirring and active stirring, and passive stirring refers to stirring part 41 is fixed, and stirring speed leans on the rotary speed of siege 2, but is due to that the general technology design rotary speed of siege 2 is unhappy, far not And required stirring speed, stirring effect is limited.Active stirring is because of the active rotation of stirring part 41 and speed is adjustable, therefore stirring effect Preferably.

In some optional embodiments, the minimum range of stirring part 41 and siege 2 is 10-15mm.Stirring part 41 and stove Presence 10-15mm gaps between bed 2, can avoid stirring part 41 from scratching siege 2 during stirring, cause stirring part 41 Abrasion.

In certain embodiments, as shown in Fig. 7-Figure 10, stirring part 41 includes linkage section 411 and two active sections 412, even Connect section 411 to be connected in rotary shaft 42, two active sections 412 are located at the both sides of linkage section 411, in the rotation direction of rotary shaft 42 Upper each active section 412 is directed away from the direction extension of rotary shaft 42.Such structure enables stirring part 41 preferably to rise The effect of material is turned over to plough.Certainly, the main function of stirring part 41 is that plough turns over material, therefore the shape of stirring part 41 is not limited to Above-mentioned shape or other reach that plough turns over the shape of material.

Specifically, in the rotation direction of rotary shaft 42, the front ends of two active sections 412 is connected, two active sections 412 Rear end extends rearwardly towards direction away from each other.It is understood that the leading portion of two active sections 412 is connected to form as spine Shape, two active sections 412 are formed as the triangle of tip direction during stirring, and the leading portion spine of two active sections 412 is first Insert material bed, the rear end rear insert bed of material.It is material bed that such design ensure that stirring part 41 is that spine end is first inserted all the time, The stirring resistance of stirring part 41 is reduced, so as to improve the stirring effect of stirring part 41.

More specifically, the side for closing on rotary shaft of the rear end of two active sections 412 is provided with breach 413, it is possible to understand that It is that during the stirring of stirring part 41, the material dug by the leading portion spine of stirring part 41 can leak into stirring part from breach 413 41 inner side, so as to enhance stirring effect.

Specifically, as shown in Figure 10, the front end of active section 412 is relatively thin, rear end is thicker, is conducive to further reducing stirring resistance Power.

Alternatively, as shown in Figure 10, the front end connecting line of two active sections 412, is formed as the middle arc being backwardly recessed Line, meanwhile, two active sections 412 are also all formed as center section arcwall face recessed toward each other, so, by two active sections 412 materials dug have turnup process by a relatively large margin, further enhancing stirring even results.

The rotary hearth furnace 200 of one embodiment of the invention is described below with reference to Fig. 1-Figure 11.

As shown in Fig. 1 and Figure 11, the rotary hearth furnace 200 in the present embodiment includes annular body of heater 1, siege 2, burner 3b and turned over Expect device 4.Wherein, furnace chamber 11 is limited in body of heater 1, and the outer shroud of furnace chamber 11 has water seal arrangement 12.Siege 2 is located in furnace chamber 11, Siege 2 horizontally rotates around the central axis of body of heater 1, and burner 3b is located on body of heater 1.Turn-down rig 4 includes being used to dig siege 2 The stirring part 41 of upper material, stirring part 41 is located in furnace chamber 11 and positioned at the top of siege 2.

As shown in figure 11, in this example, in the region of a quarter of siege 2, top is provided with two turn-down rigs 4, And two turn-down rigs 4 are spaced apart around the central axis of body of heater 1 and set.Meanwhile, 4 are provided between two neighboring turn-down rig 4 Individual burner 3b.

Shown as shown in Figure 1, Figure 3 and Figure 4, turn-down rig 4 includes rotary shaft 42 and drive mechanism 43.Wherein, rotary shaft 42 is set On body of heater 1, stirring part 41 is bolted in rotary shaft 42, and the minimum range of stirring part 41 and siege 2 is 10- 15mm；Drive mechanism 43 is connected to drive rotary shaft 42 to rotate with rotary shaft 42.Drive mechanism 43 is located at the outside of body of heater 1, turns The mechanism of shaft end seal 421 is connected between moving axis 42 and body of heater 1.The both sides of rotary shaft 42 are connected to screw elevator mechanism 44, profit The distance between stirring part 41 and siege 2 can be adjusted with screw lifting mechanism 44.

As shown in Fig. 2

The structure of shaft end seal 421 includes：Fixing seal end cap 421a, it is slidingly sealed end cap 421b, inner end cap 421d and outer End cap 421c.

Wherein, fixing seal end cap 421a is welded to connect on body of heater 1, is slidingly sealed end cap 421b and outer end cap 421c is equal It is enclosed in rotary shaft 42, is slidingly sealed in the gap between end cap 421b and outer end cap 421c filled with sealing material 421e outside, it is close Envelope material 421e can be graphite packing etc., be slidingly sealed between end cap 421b and outer end cap 421c and be bolted.

It is enclosed on and is slidingly sealed on end cap 421b outside inner end cap 421d, solderable are connected to of inner end cap 421d is slidingly sealed end cap On 421b.It is be arranged in parallel between inner end cap 421d and fixing seal end cap 421a, inner end cap 421d and fixing seal end cap 421a It can be bolted.

Wherein, vertical elongated hole can be set on inner end cap 421d, bolt can be vertically slidable along elongated hole in the case of screw plate, i.e., Inner end cap 421d can be relatively fixed end cover 421a and move up and down, so as to drive rotary shaft 42 vertically movable.When bolt is tightened When, inner end cap 421d is fixed on fixing seal end cap 421a, so that the height of rotary shaft 42 is fixed.

It should be noted that when can adjust the distance between stirring part 41 and siege 2 using screw lifting mechanism 44, needing The bolt being connected between fixing seal end cap 421a and inner end cap 421d is first unclamped, is then entering row distance regulation, regulation After the completion of tighten the bolt being connected between fixing seal end cap 421a and inner end cap 421d again.

The cooling duct for flowing cooling agent, axial direction of the cooling duct in rotary shaft 42 are limited in rotary shaft 42 Upper insertion rotary shaft 42, the two ends of rotary shaft 42 are connected to swivel joint, the swivel joint at two ends be respectively intended to connect into Go out current

As shown in Fig. 7-Figure 10, stirring part 41 includes linkage section 411 and two active sections 412, and linkage section 411, which is connected to, to be turned On moving axis 42, two active sections 412 are located at the both sides of linkage section 411, are each worked in the rotation direction towards rotary shaft 42 Section 412 is directed away from the direction extension of rotary shaft 42.In the rotation direction of rotary shaft, the front end of two active sections is connected, after Hold and extend rearwardly towards direction away from each other.In addition, the relatively thin rear end of the leading portion of two active sections 412 is thicker, and two work The side of the neighbouring rotary shaft 42 of the rear end of section 412 is provided with breach 413.

As shown in Fig. 5-Fig. 6, stirring part 41 is arranged along the axis direction of rotary shaft 42 in multiple row, and two adjacent row stirring parts 41, which stagger 45 °, is set.There are four stirring parts 41 on each row, and be evenly distributed on the periphery of rotary shaft 42.In addition, Stirring part 41 is made using heat-resisting steel sheet and plate.

The present embodiment uses the stirring part 41 with drive device, and the bottoms material of siege 2 is dug and broken up by stirring part 41, makes thing Material is heated relatively uniform, and production technology is wide, and productivity effect is high, good product quality, and maximum production capacity is up to 800,000 tons/year.Stirring Device 4 can be set according to the yield size of rotary hearth furnace 200 in the different stove section multiple spots of siege 2, for example, yield is below 200,000 tons 2-3 turn-down rig can be set in rotary hearth furnace 200；3-5 turn-down rig 4 can be set in rotary hearth furnace 200 of the yield below 500,000 tons. Additionally can be according to layer thickness, and the speed of service of siege 2, and the stirring speed and height of turn-down rig are adjusted, with suitable Answer manufacturing technique requirent.The siege 2 of rotary hearth furnace 200 can flexibly increase after provided with active turn-down rig 4 in any stove section simultaneously Add burner 3b, heating efficiency is strong, it is adaptable to metallurgical technology field.

In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show The description of example " or " some examples " etc. means to combine specific features, structure, material or the spy that the embodiment or example are described Point is contained at least one embodiment of the present invention or example.In this manual, to the schematic representation of above-mentioned term not Necessarily refer to identical embodiment or example.Moreover, specific features, structure, material or the feature of description can be any One or more embodiments or example in combine in an appropriate manner.

Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that：Not In the case of departing from the principle and objective of the present invention a variety of change, modification, replacement and modification can be carried out to these embodiments, this The scope of invention is limited by claim and its equivalent.

Claims (10)

1. a kind of rotary hearth furnace, it is characterised in that including：

Furnace chamber is limited in the body of heater of annular, the body of heater；

Siege, the siege is located in the furnace chamber, and the siege horizontally rotates around the central axis of the body of heater；

Burner, the burner is located on the body of heater；

Turn-down rig, the turn-down rig includes：Stirring part for digging material on the siege, the stirring part is located at institute State in furnace chamber and positioned at the top of the siege.

2. rotary hearth furnace according to claim 1, it is characterised in that the turn-down rig is multiple, multiple stirring dresses The central axis put around the body of heater, which is spaced apart, to be set.

3. rotary hearth furnace according to claim 2, it is characterised in that provided with multiple described between per two neighboring turn-down rig Burner.

4. rotary hearth furnace according to claim 1, it is characterised in that the turn-down rig includes：

Rotary shaft, the rotary shaft is located on the body of heater, and the stirring part is located in the rotary shaft；

Drive mechanism, the drive mechanism is connected to drive the rotary shaft to rotate with the rotary shaft.

5. rotary hearth furnace according to claim 4, it is characterised in that the drive mechanism is located at the outside of the body of heater, institute State and be connected with sealing mechanism for shaft end between rotary shaft and the body of heater.

6. rotary hearth furnace according to claim 1, it is characterised in that the minimum range of the stirring part and the siege is 10-15mm。

7. rotary hearth furnace according to claim 4, it is characterised in that the stirring part includes：Linkage section and two active sections, The linkage section is connected in the rotary shaft, and described two active sections are located at the both sides of the linkage section, in the rotary shaft Rotation direction on each active section be directed away from the direction extension of the rotary shaft.

8. rotary hearth furnace according to claim 7, it is characterised in that in the rotation direction of the rotary shaft, described in two The front end of active section is connected, and the rear end of two active sections extends rearwardly towards direction away from each other.

9. rotary hearth furnace according to claim 7, it is characterised in that the neighbouring rotation of the rear end of each active section The side of axle is provided with breach.

10. rotary hearth furnace according to claim 4, it is characterised in that limited in the rotary shaft for flowing cooling agent Cooling duct, the cooling duct rotary shaft described in insertion, the two of the rotary shaft on the axial direction of the rotary shaft End is connected to swivel joint.