CN101929797A - Sintering equipment - Google Patents
Sintering equipment Download PDFInfo
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- CN101929797A CN101929797A CN2009100883348A CN200910088334A CN101929797A CN 101929797 A CN101929797 A CN 101929797A CN 2009100883348 A CN2009100883348 A CN 2009100883348A CN 200910088334 A CN200910088334 A CN 200910088334A CN 101929797 A CN101929797 A CN 101929797A
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- rotary kiln
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Abstract
The invention discloses sintering equipment comprising a rotary kiln, a combustor and a dust removing device, wherein the rotary kiln is provided with a head end and a tail end; the combustor is connected with the head end of the rotary kiln so as to supply fuel to the rotary kiln; a smoke inlet of the dust removing device is connected with the tail end of the rotary kiln; and a dust outlet of the dust removing device is connected with the head end of the rotary kiln so as to be convenient for one part of kiln ash separated by the dust moving device to return to the rotary kiln. The sintering equipment can effectively reduce or eliminate a sintering ring in the rotary kiln and eliminate the slagging operation and has longer service life.
Description
Technical field
The present invention relates to a kind of agglomerating plant, especially relate to the employed agglomerating plant of a kind of production alumina technology.
Background technology
Aluminium oxide is the primary raw material of electrolysis aluminium metallurgy.The production overwhelming majority of current aluminium oxide adopts bauxite as raw material, and production method mainly is a Bayer process, and minority adopts sintering process, Bayer-sintering series process etc.
In the technology that adopts sintering process or Bayer-sintering producing alumina through series process, need carry out sintering to raw material or Bayer process red mud, adopt agglomerating plant to carry out sintering traditionally usually with rotary kiln.
Rotary kiln is the chief component of agglomerating plant.When carrying out sintering, rotary kiln is advanced in stove by sintering feed and the order handled can be divided into four zones, promptly drying belt, divide ungird, clinkering zone and salband.
When carrying out sintering work, because the temperature in the rotary kiln, especially the temperature height of clinkering zone, therefore the sintering feed of high temperature is bonded on the inwall of rotary kiln easily, the ring formation of sintering feed on the rotary kiln inwall promptly takes place, particularly therefore the easier generation ring formation in part place that ungirds adjacent at clinkering zone and branch has influenced normally carrying out of sintering, needs often to safeguard.When ring formation is serious, even sintering can't carry out.In addition when ring formation acquires a certain degree, the ring formation sintering feed comes off from the kiln wall, form very big egg type piece, this egg type piece is in descending process, damage agglomerating plant easily, for example can damage the kiln body of rotary kiln and/or be used to cool off the cooling device that burns till grog, and can bring potential safety hazard to operating personnel.
For this reason, conventional sintering equipment need be provided with air bubble or Cinder crusher usually, is used for excessive in the rotary kiln burnt till the fragmentation of grog piece.Increase the structure and the complicated operation degree of agglomerating plant, caused production cost to increase.
Summary of the invention
The present invention is intended to solve at least one of described technical problem of the prior art.For this reason, an order of the present invention is to propose a kind of agglomerating plant, and this agglomerating plant can effectively reduce or eliminate ring formation and the structure and simple to operate in the rotary kiln.
To achieve these goals, the present invention proposes a kind of agglomerating plant, comprises rotary kiln, and described rotary kiln has head end and tail end; Burner, described burner link to each other with the head end of described rotary kiln to supply with fuel in rotary kiln; And dust arrester, the mouth that advances of described dust arrester links to each other with the tail end of described rotary kiln, and the dust mouth of described dust arrester links to each other with the head end of rotary kiln so that the isolated a part of kiln ash of dust arrester turns back in the rotary kiln from the head end of rotary kiln.
According to agglomerating plant of the present invention, because the head end of the isolated a part of kiln ash of dust arrester from rotary kiln turned back in the rotary kiln, especially described a part of kiln ash is delivered to the place of easy ring formation in the rotary kiln from the head end of rotary kiln, for example described a part of kiln ash turns back to clinkering zone and divides on the rotary kiln inwall at the part place that ungirds adjacent, because kiln ash temperature is low relatively, therefore sintering feed is not with good adherence of the inwall of rotary kiln, reduce or eliminate the ring formation of sintering feed on the inwall of rotary kiln thus, and the structure of agglomerating plant and simple to operate, elimination finishes the potential safety hazard of astragal, and, reduce or eliminate ring formation by the kiln ash, also can not increase the cost of agglomerating plant greatly, and can not come adverse influence sintering.
Also have following additional technical feature according to agglomerating plant of the present invention:
Described agglomerating plant further comprises and is used between the head end of the dust mouth that is arranged on dust arrester and rotary kiln described a part of kiln ash is blown into soot blower in the rotary kiln.
By soot blower described a part of kiln ash is blown in the rotary kiln place of ring formation easily, can reliably the kiln ash be turned back in the rotary kiln place of ring formation easily.
Described head end is provided with the head end cover, and described tail end is provided with tail end cover and the flue that links to each other with the tail end cover, and the mouth that advances of described dust arrester links to each other with flue.
Put flue by head end cover and tail end cover being set respectively at head end and tail end and being covered with, can better the flue gas in the rotary kiln be collected in the dust arrester at tail end.
Described dust arrester comprises whirlwind tube and cottrell, wherein the whirlwind tube advance that mouth links to each other with described flue and the outlet flue of whirlwind tube links to each other with the mouth that advances of cottrell, wherein said soot blower links to each other with the dust mouth of cottrell.
By whirlwind tube and cottrell are set, the flue gas of discharging from rotary kiln at first passes through whirlwind tube one-time dedusting, can remove the kiln ash of the about 80-90% in the flue gas, and then flue gas is carried out final dusting by cottrell, thereby the dustiness in the gas of discharging reduces greatly, has reduced the pollution to environment.
Described soot blower also links to each other with the dust mouth of described whirlwind tube optionally the isolated a part of kiln ash of whirlwind tube is turned back in the rotary kiln from head end.
Soot blower not only all turns back to the isolated kiln ash of cottrell in the rotary kiln, if the isolated kiln ash of cottrell amount can not meet the demands, then soot blower can turn back to the isolated a part of kiln ash of whirlwind tube in the rotary kiln, improves the reliability that reduces or reduce ring formation.
Between the dust mouth of described soot blower and whirlwind tube, be connected with valve.By controlling described valve, just can control easily and whether the isolated kiln ash of whirlwind tube is turned back in the rotary kiln.
The dust mouth of described whirlwind tube also links to each other with the tail end of rotary kiln so that the isolated residue kiln of whirlwind tube ash is turned back in the rotary kiln from tail end.
By the tail end of the isolated residue kiln of whirlwind tube ash from rotary kiln turned back in the rotary kiln, recycling kiln ash has reduced environmental pollution, and has improved economic benefit, need not to handle in addition the kiln ash in addition.
The dust mouth of described dust arrester also links to each other with tail end so that the tail end of the isolated residue kiln of dust arrester ash from rotary kiln turned back in the rotary kiln.
Described agglomerating plant comprises that further the head end that is arranged on rotary kiln is used to cool off the inflating beam grid formula cooler that burns till grog.Utilize inflating beam grid formula cooler to cool off burning till grog efficiently.
Described a part of kiln ash turns back to the clinkering zone place in the rotary kiln.
Because in the rotary kiln, therefore the place of easy ring formation, turns back to the better effects if that the clinkering zone place reduces or avoid ring formation in the rotary kiln with the kiln ash at the clinkering zone place.
Additional aspect of the present invention and advantage part in the following description provide, and part will become obviously from the following description, or recognize by practice of the present invention.
Description of drawings
Above-mentioned and/or additional aspect of the present invention and advantage are from obviously and easily understanding becoming the description of embodiment in conjunction with following accompanying drawing, wherein:
Fig. 1 is the schematic diagram according to the agglomerating plant of the embodiment of the invention;
Fig. 2 is the schematic diagram of agglomerating plant according to another embodiment of the present invention.
The specific embodiment
Describe embodiments of the invention below in detail, the example of described embodiment is shown in the drawings, and wherein identical from start to finish or similar label is represented identical or similar elements or the element with identical or similar functions.Below by the embodiment that is described with reference to the drawings is exemplary, only is used to explain the present invention, and can not be interpreted as limitation of the present invention.
Below with reference to the agglomerating plant 100 of Fig. 1 description according to the embodiment of the invention.
As shown in Figure 1, the agglomerating plant 100 according to the embodiment of the invention comprises rotary kiln 1, burner 2 and dust arrester 14.Burner 2 links to each other with the head end (right-hand member among Fig. 1) of rotary kiln 2, be used in rotary kiln 2, supplying with fuel, for example burner 2 is a coal burner, in rotary kiln 2, supply with coal dust and contain the oxygen air by coal dust roots blower 3, certainly, also can utilize independent blower fan in rotary kiln 2, to supply with and contain the oxygen air.Can be used for the series process alumina producing according to the agglomerating plant 100 of the embodiment of the invention and raw material are sintered into burn till grog, but the present invention is not limited to this purposes.
The mouth 141 that advances of dust arrester 14 links to each other with the tail end (left end among Fig. 1) of rotary kiln 2, and the dust mouth of dust arrester 14 links to each other with the head end of rotary kiln 2, for example, the dust mouth of dust arrester 14 links to each other with an end of pipeline, and the other end of pipeline stretches into preset distances in the rotary kiln 2 from the head end of rotary kiln 2.Thus, dust arrester 14 isolated a part of kiln ashes turn back in the rotary kiln 2 from the head end of rotary kiln 2, and more specifically, described a part of kiln ash turns back to the place that ring formation takes place in the rotary kiln 2 easily.Discharge by outlet flue 142 through the flue gas after dust arrester 14 dedustings.In an example of the present invention, the dust mouth of dust arrester 14 links to each other with soot blower 3, thereby utilize soot blower 3 that dust arrester 14 isolated a part of kiln ashes are turned back in the rotary kiln 2, for example be blown on the inwall of the rotary kiln 2 that the ring formation place takes place in the rotary kiln 2 easily, in this example, the other end of the pipeline in the head end from rotary kiln 2 stretches into rotary kiln 2 can be provided with the nozzle (not shown), is used to spray the inwall that the kiln ash is ejected into rotary kiln 2.In addition, dust arrester 14 isolated residue kiln ashes can collect.Alternatively, the outlet of dust arrester 14 can also link to each other with the tail end of rotary kiln 2, so that dust arrester 14 isolated residue kiln ashes are turned back in the rotary kiln 2 from the kiln tail end, thereby recycling kiln ash has reduced pollution.
Rotary kiln 2 can be divided into four zones vertically substantially: drying belt 1a, divide ungird 1b, clinkering zone 1c and salband 1d.
By utilizing soot blower 3 to turn back in the rotary kiln 2 dust arrester 14 isolated a part of kiln ashes, can reduce or eliminate the ring formation in the revolution 2 from head end.More specifically, the a part of kiln ash that returns from dust arrester 14 for example can be blown on the inwall of clinkering zone 1b and the rotary kiln 2 that divides the adjacent part of 1a that ungirds, because the temperature of kiln ash is low relatively, therefore sintering feed is not easy to be bonded on the inwall in the rotary kiln 2, reduced or eliminated the ring formation of sintering feed on rotary kiln 2 inwalls, avoided the influence of ring formation, reduced the potential safety hazard that ring formation brings the damage and the ring formation of agglomerating plant sintering.In other words, described a part of kiln ash turns back to the clinkering zone 1c place in the rotary kiln 2, owing to be easy to generate ring formation most at clinkering zone 1c place, therefore a part of kiln ash is turned back to the clinkering zone 1c place in the rotary kiln 2, eliminates or reduce the better effects if of ring formation.
As shown in Figure 1, in an example of the present invention, be respectively equipped with head end cover 4 and tail end cover 5 at the head end and the tail end of rotary kiln 2, and also be provided with the flue 6 that links to each other with tail end cover 5 at tail end, by head end cover 4 and tail end cover 5 and flue 6 are set, the flue gas of being convenient to rotary kiln 2 is collected.Flue 6 also links to each other with the mouth that advances of dust arrester 14, thereby flue gas can enter in the dust arrester 14 in flue 6, has avoided the leakage of flue gas.
For the grogs that burn till of discharging in rotary kiln 2 are cooled off, also be provided with inflating beam grid formula cooler 10 at the head end of rotary kiln 2, blower fan 12 is used for air blast in cooler 10.The cooled grog that burns till is seen off by bucket conveyor 11.
Below with reference to Fig. 2 agglomerating plant is according to another embodiment of the present invention described.In the embodiment shown in Figure 2, dust arrester 14 comprises whirlwind tube 7 and cottrell 8.Whirlwind tube 7 advance that mouth links to each other with flue 6 and the outlet flue of whirlwind tube links to each other with the mouth 81 that advances of cottrell 8, soot blower 3 links to each other with the dust mouth of cottrell 8.Thereby flue gas process cottrell 8 final dustings through whirlwind tube 7 one-time dedustings have reduced the kiln ash content in the discharging flue gas, have reduced environmental pollution.Discharge by outlet flue 82 through the flue gas after cottrell 8 dedustings.Whirlwind tube 7 can be removed in the flue gas kiln ash greater than 80-90%, and cottrell 8 can be removed the kiln ash of remaining 10-20% in the flue gas.Cottrell 8 isolated kiln ashes all turn back in the rotary kiln 2 from the kiln hood end by soot blower 3.
As shown in Figure 2, in an example of the present invention, soot blower 3 also links to each other with the dust mouth of whirlwind tube 7 optionally whirlwind tube 7 isolated a part of kiln ashes are turned back in the rotary kiln 2 from head end, for example clinkering zone 1c place.For example, when cottrell 8 isolated kiln ash amounts can not satisfy the requirement that reduces or eliminates ring formation in the rotary kiln 2, whirlwind tube 7 isolated a part of kiln ashes can be turned back in the rotary kiln 2 from head end.For this reason, between the dust mouth of soot blower 3 and whirlwind tube 7, be connected with valve 9, can control easily by by-pass valve control 9 and return the kiln ash to rotary kiln 2 from whirlwind tube 7.
In the further example of the present invention, the dust mouth of whirlwind tube 7 also links to each other with the tail end of rotary kiln 2 so that whirlwind tube 7 isolated residue kiln ashes are turned back in the rotary kiln 2 from tail end.If certainly whirlwind tube 7 isolated kiln ashes do not turn back in the rotary kiln 2 from head end, then whole kiln ashes all turns back in the rotary kiln 2 from tail end, and recycling thus kiln ash has been saved raw material, has reduced environmental pollution.Other structures of agglomerating plant embodiment illustrated in fig. 2 and operation are not described in detail here with embodiment illustrated in fig. 1 identical.
Although illustrated and described embodiments of the invention, those having ordinary skill in the art will appreciate that: can carry out multiple variation, modification, replacement and modification to these embodiment without departing from the principles and spirit of the present invention, scope of the present invention is limited by claim and equivalent thereof.
Claims (10)
1. an agglomerating plant is characterized in that, comprises rotary kiln, and described rotary kiln has head end and tail end; Burner, described burner link to each other with the head end of described rotary kiln to supply with fuel in rotary kiln; And dust arrester, the mouth that advances of described dust arrester links to each other with the tail end of described rotary kiln, and the dust mouth of described dust arrester links to each other with the head end of rotary kiln so that the isolated a part of kiln ash of dust arrester turns back in the rotary kiln from the head end of rotary kiln.
2. agglomerating plant as claimed in claim 1 is characterized in that, further comprises being used between the head end of the dust mouth that is arranged on dust arrester and rotary kiln described a part of kiln ash is blown into soot blower in the rotary kiln.
3. agglomerating plant as claimed in claim 2 is characterized in that described head end is provided with the head end cover, and tail end is provided with tail end cover and the flue that links to each other with the tail end cover, and the mouth that advances of dust arrester links to each other with flue.
4. agglomerating plant as claimed in claim 3, it is characterized in that, described dust arrester comprises whirlwind tube and cottrell, wherein the whirlwind tube advance that mouth links to each other with described flue and the outlet flue of whirlwind tube links to each other with the mouth that advances of cottrell, wherein said soot blower links to each other with the dust mouth of cottrell.
5. agglomerating plant as claimed in claim 4 is characterized in that, described soot blower also links to each other with the dust mouth of whirlwind tube optionally the isolated a part of kiln ash of whirlwind tube is turned back in the rotary kiln from head end.
6. agglomerating plant as claimed in claim 5 is characterized in that, is connected with valve between the dust mouth of described soot blower and whirlwind tube.
7. agglomerating plant as claimed in claim 6 is characterized in that, the dust mouth of whirlwind tube also links to each other with the tail end of rotary kiln so that the isolated residue kiln of whirlwind tube ash is turned back in the rotary kiln from tail end.
8. agglomerating plant as claimed in claim 1 is characterized in that, the dust mouth of described dust arrester also links to each other with tail end so that the tail end of the isolated residue kiln of dust arrester ash from rotary kiln turned back in the rotary kiln.
9. agglomerating plant as claimed in claim 1 is characterized in that, comprises that further the head end that is arranged on rotary kiln is used to cool off the inflating beam grid formula cooler that burns till grog.
10. agglomerating plant as claimed in claim 1 is characterized in that, described a part of kiln ash turns back to the clinkering zone place in the rotary kiln.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100883348A CN101929797A (en) | 2009-06-26 | 2009-06-26 | Sintering equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100883348A CN101929797A (en) | 2009-06-26 | 2009-06-26 | Sintering equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101929797A true CN101929797A (en) | 2010-12-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100883348A Pending CN101929797A (en) | 2009-06-26 | 2009-06-26 | Sintering equipment |
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| CN (1) | CN101929797A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112279624A (en) * | 2020-11-23 | 2021-01-29 | 河南郑矿机器有限公司 | Coal gangue ceramsite ring-forming-preventing calcining system |
| CN114717372A (en) * | 2022-04-26 | 2022-07-08 | 酒泉钢铁(集团)有限责任公司 | High-temperature cleaning method for ring formation of rotary kiln for direct reduction of iron ore |
-
2009
- 2009-06-26 CN CN2009100883348A patent/CN101929797A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112279624A (en) * | 2020-11-23 | 2021-01-29 | 河南郑矿机器有限公司 | Coal gangue ceramsite ring-forming-preventing calcining system |
| CN114717372A (en) * | 2022-04-26 | 2022-07-08 | 酒泉钢铁(集团)有限责任公司 | High-temperature cleaning method for ring formation of rotary kiln for direct reduction of iron ore |
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Application publication date: 20101229 |