CN100368297C - Device for preparing aluminum oxide self-efflorescence grog by fusion method and preparation method thereof - Google Patents
Device for preparing aluminum oxide self-efflorescence grog by fusion method and preparation method thereof Download PDFInfo
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- CN100368297C CN100368297C CNB2006101394190A CN200610139419A CN100368297C CN 100368297 C CN100368297 C CN 100368297C CN B2006101394190 A CNB2006101394190 A CN B2006101394190A CN 200610139419 A CN200610139419 A CN 200610139419A CN 100368297 C CN100368297 C CN 100368297C
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- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 title claims abstract description 26
- 238000006253 efflorescence Methods 0.000 title claims description 20
- 206010037844 rash Diseases 0.000 title claims description 20
- 238000007500 overflow downdraw method Methods 0.000 title claims description 14
- 238000002360 preparation method Methods 0.000 title description 2
- 238000001354 calcination Methods 0.000 claims abstract description 151
- 238000000034 method Methods 0.000 claims abstract description 68
- 238000000227 grinding Methods 0.000 claims abstract description 66
- 239000007789 gas Substances 0.000 claims abstract description 21
- 239000002912 waste gas Substances 0.000 claims abstract description 20
- 238000001816 cooling Methods 0.000 claims abstract description 18
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 179
- 238000006243 chemical reaction Methods 0.000 claims description 89
- 239000002994 raw material Substances 0.000 claims description 78
- 239000000463 material Substances 0.000 claims description 75
- 239000007791 liquid phase Substances 0.000 claims description 72
- 239000007788 liquid Substances 0.000 claims description 49
- 238000002156 mixing Methods 0.000 claims description 40
- 239000010881 fly ash Substances 0.000 claims description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 24
- 238000004519 manufacturing process Methods 0.000 claims description 21
- 239000003245 coal Substances 0.000 claims description 18
- 239000007921 spray Substances 0.000 claims description 17
- 239000002699 waste material Substances 0.000 claims description 14
- 230000018044 dehydration Effects 0.000 claims description 9
- 238000006297 dehydration reaction Methods 0.000 claims description 9
- 238000001035 drying Methods 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 9
- 238000009827 uniform distribution Methods 0.000 claims description 9
- 239000000779 smoke Substances 0.000 claims description 7
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims description 5
- 239000000571 coke Substances 0.000 claims description 5
- 239000010436 fluorite Substances 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 2
- 239000004744 fabric Substances 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 13
- 230000005021 gait Effects 0.000 description 9
- 230000009286 beneficial effect Effects 0.000 description 4
- 229910001570 bauxite Inorganic materials 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 235000019738 Limestone Nutrition 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000006028 limestone Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000012716 precipitator Substances 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 239000004927 clay Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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Abstract
The invention discloses equipment and preparing method of aluminum oxide clinker through fusing method, which comprises the following parts: high-temperature fan, hot-air pipe, calcining kiln, rotary cloth tool, elevator, cooler, deduster, chimney, waste-gas fan, discharger, feed transmitter, exhaust gas pipe, upper and lower wind chamber, inlet and clinker outlet. The preparing method comprises the following steps: (1) grinding; (2) fusing to obtain aluminum oxide clinker; (3) cooling to obtain the self-powdered clinker of aluminum oxide.
Description
Technical field:
The present invention relates to a kind of equipment of aluminium oxide self powdering clinker and utilize this equipment to prepare the method for aluminium oxide self powdering clinker, especially relate to the equipment of a kind of flyash and Wingdale preparing aluminum oxide self-efflorescence grog by fusion method and utilize this equipment to adopt scorification to prepare the method for producing aluminium oxide self powdering clinker.
Background technology:
Domestic alumina producing has two kinds of methods, the one, bayer's process; The 2nd, sintering process.It is the higher-grade bauxitic clay that bayer's process is produced main raw material, and the A/s of general requirement bauxite ore is greater than 8.Main production equipments is the canalization device.The main raw material that sintering process is produced is a low-grade bauxite, and the A/s of general requirement bauxite ore is about 5, and equipment is wet process rotary kiln.And be solid pollutant---the flyash of heat power plant's discharging at present for raw material sources, its A/s is 0.8-1.2, and still also do not have a kind of good employing flyash to carry out the method and apparatus of alumina producing at present, and make the high method and apparatus of the up-to-standard rate of alumina clinker simultaneously.
Summary of the invention:
First purpose of the present invention is to provide a kind of equipment of preparing aluminum oxide self-efflorescence grog by fusion method.
Second purpose of the present invention is to provide a kind of method of utilizing aforesaid device to prepare aluminium oxide self powdering clinker.
First purpose of the present invention is implemented by following technical scheme: the equipment of preparing aluminum oxide self-efflorescence grog by fusion method includes high-temperature blower, heating duct, calcining kiln, the revolution distributor, lift, water cooler, fly-ash separator, chimney, exhaust gas fan, feeding transfer roller and waste pipe, one end of described high-temperature blower links to each other with the secondary hot-air pipe, the other end of described high-temperature blower links to each other with the hot-blast outlet of the described heating duct of cooler, on the described secondary hot-air pipe, following two ends link to each other respectively with described calcining kiln outer wall on, the bottom air compartment, described feeding transfer roller links to each other with described lift, described lift links to each other with described revolution distributor, be provided with opening for feed on described calcining kiln top, described revolution distributor links to each other with described opening for feed; Be provided with the grog outlet in the lower end of described calcining kiln, be provided with waste gas outlet links to each other with described water cooler by waste pipe on the top of described calcining kiln, described cooler outlet links to each other with described fly-ash separator inlet by airduct, and described fly-ash separator exports with described exhaust gas fan under the chimney and links to each other.
Described water cooler is connected in dumper.The water cooler main purpose is to reduce to enter the dust-precipitator temperature, because some efflorescence grog of suction function of exhaust gas fan plays herein with gas one, because the diameter of water cooler is far longer than the diameter of system's airduct, in water cooler owing to the reason wind speed decreased of hole enlargement, the efflorescence grog that the part particle is bigger settles down at this, dumper one is that the grog that this place settles down is drawn off, the 2nd, and play lock wind effect minimizing system and leak out, reduce the power consumption of exhaust gas fan.
Described calcining kiln inner chamber is a cavity, divides three reaction zones, and top is the raw material resolver, is the solid-liquid mixing zone in bottom, described raw material resolver, is the high-temperature liquid-phase reaction zone in bottom, described solid-liquid mixing zone; Described calcining kiln outer wall in described raw material resolver correspondence is provided with the top air compartment, is provided with the tangent line blast inlet that tangentially distributes corresponding to the calcining kiln wall of described raw material resolver bottom and is connected with described top air compartment; Described calcining kiln outer wall in described high-temperature liquid-phase reaction zone correspondence is provided with the bottom air compartment, is provided with the radially blast inlet that radially distributes corresponding to the calcining kiln wall of described high-temperature liquid-phase reaction zone bottom and is connected with described bottom air compartment; Be provided with coal burner in described solid-liquid mixing zone and described high-temperature liquid-phase reaction zone bottom.
Described coal burner is fixed on described calcining kiln outer wall, and the bocca of described coal burner passes described calcining kiln wall, places in the described calcining kiln.
Described coal burner is the incendiary pencil more than at least one or two, and described incendiary pencil tube head passes described calcining kiln wall and places in the described calcining kiln.
Described incendiary pencil more than two is at described calcining kiln outer wall uniform distribution, and promptly the described incendiary pencil tube head in described calcining kiln is evenly distributed in the described calcining kiln.
Described tangent line blast inlet uniform distribution.Tangent line blast inlet uniform distribution can make into the material of calcining kiln even in same section preheating, and it is stable to be beneficial to next step thermal technology, and it is to make to enter warm air generation eddy flow effect in the stove that tangential air intake mainly acts on, and increases the effective contact of warm air with material.
Described radially blast inlet uniform distribution.It is even in same section preheating that radially the blast inlet uniform distribution will enter the material of calcining zone, and temperature improves rapidly when being beneficial to next step calcining, reduces fuel consumption.
Second purpose of the present invention implemented by following technical scheme: utilize aforesaid equipment to adopt scorification to prepare the method for producing aluminium oxide self powdering clinker, include following steps, (1), powder-grinding process, (2), the scorification calcination process gets alumina clinker, (3), refrigerating work procedure and make aluminium oxide self powdering clinker;
Wherein (1), powder-grinding process: following composition by weight ratio: flyash is 20-40, and Wingdale is 60-80, prepares burden and grinds;
(2), the scorification calcination process gets alumina clinker: the raw material that ground by step (1) gained are transported to described revolution distributor by described feeding transfer roller by lift, enter calcining kiln from the vertical opening for feed of described calcining kiln again;
(a), enter the material of raw material resolver, described calcining kiln top, in described raw material resolver, carry out drying, dehydration, the temperature of reaction in described raw material resolver is 800 ℃-1000 ℃;
(b), enter solid-liquid mixing zone, calcining kiln middle part, material carries out liquid phase and generates in described solid-liquid mixing zone, simultaneously C through the raw material after decomposing in described raw material resolver
2S forms in described solid-liquid mixing zone, and its temperature of reaction is 1000 ℃-1300 ℃;
(c), generate material through in described solid-liquid mixing zone, carrying out liquid phase, enter the high-temperature liquid-phase reaction zone of calcining kiln bottom, its range of reaction temperature is 1300-1500 ℃, material is completed into liquid state in described high-temperature liquid-phase reaction zone, all simultaneously chemical reactions are finished in described high-temperature liquid-phase reaction zone, the final alumina clinker that generates enters the cooler cooling from the grog outlet of described calcining kiln lower end;
(3), refrigerating work procedure and make aluminium oxide self powdering clinker: the alumina clinker that is obtained by the scorification calcination process slowly cools off at 550 ℃-350 ℃ in cooler, and be 30 minutes-50 minutes cooling time, C
2S is changed to the γ type by the β type, and obtains aluminium oxide self powdering clinker.
In the powder-grinding process of step (1), also include fluorite 0.5-1.5 by weight ratio, coke 0.8-5.0.
The secondary hot-air of described secondary hot-air pipe comes from cooler.
Enter the secondary hot-air of top air compartment from described secondary hot-air pipe, spray into bottom, described raw material resolver from described tangent line blast inlet.Make and produce the eddy flow effect in the stove.Rely on the size control residence time of material in kiln of eddy flow hot blast, material is calcined under suspended state, heat exchange is abundant like this, calcines effective.
Enter the secondary hot-air of bottom air compartment from described secondary hot-air pipe, spray into described high-temperature liquid-phase reaction zone bottom from described radially blast inlet.Rely on the aweather gait of march of size control material of footpath.Guarantee material residence time of high-temperature liquid-phase reaction zone to guarantee the quality of grog.
Waste gas in the described calcining kiln enters in the water cooler by waste pipe through waste gas outlet, enters fly-ash separator by airduct by the fly-ash separator inlet again, by exhaust gas fan by smoke stack emission.
Utilize aforesaid equipment to adopt scorification to prepare the method for producing aluminium oxide self powdering clinker and the aluminium oxide self powdering clinker that makes can be used for metallurgical-grade aluminum oxide.
Advantage of the present invention is: the present invention adopts scorification, and chemical reaction carries out in liquid phase, reacts completely and fast.Adopt calcining in the dry method raw material feeding kiln, so just can save energy consumption.Secondary hot-air adopts tangential way to spray into calcining kiln in raw material resolver bottom, make to produce the eddy flow effect in the kiln.Rely on the size control residence time of material in kiln of eddy flow hot blast.One secondary hot-air adopts radial manner to enter calcining kiln in high-temperature liquid-phase reaction zone bottom in addition.Rely on the aweather gait of march of size control material of footpath.The present invention is simple to operate, and energy-saving and cost-reducing, the clinker quality qualification rate reaches 100%.
Description of drawings:
Fig. 1 is an one-piece construction synoptic diagram of the present utility model.
Fig. 2 is a cut-away section structural representation of the present utility model.
Fig. 3 is the A-A sectional view of Fig. 2.
Fig. 4 is the B-B sectional view of Fig. 2.
Fig. 5 is a process flow sheet of the present invention.
High-temperature blower-1, heating duct-2, calcining kiln-3, revolution distributor-4, lift-5, water cooler-6, fly-ash separator-7, chimney-8, exhaust gas fan-9, dumper-10, feeding transfer roller-11, waste pipe-12, secondary hot-air pipe-13, top air compartment-14, bottom air compartment-15, waste gas outlet-16, opening for feed-17, grog outlet-18, cooler outlet-19, airduct-20, radially blast inlet-21, raw material resolver-22, solid-liquid mixing zone-23, high-temperature liquid-phase reaction zone-24, coal burner-25, tangent line blast inlet-26, bocca-27.
Below in conjunction with drawings and Examples the utility model is described further.
Embodiment:
Embodiment 1: as Fig. 1, Fig. 2, Fig. 3, shown in Figure 4, the equipment of preparing aluminum oxide self-efflorescence grog by fusion method includes high-temperature blower 1, heating duct 2, calcining kiln 3, revolution distributor 4, lift 5, water cooler 6, fly-ash separator 7, chimney 8, exhaust gas fan 9, feeding transfer roller 11, waste pipe 12, is connected in dumper 10 with water cooler 6.One end of high-temperature blower 1 links to each other with secondary hot-air pipe 13, the other end of high-temperature blower 1 links to each other with the hot-blast outlet of the heating duct of cooler 2, the upper/lower terminal of the secondary hot-air pipe 13 upper and lower part air compartment 14,15 with calcining kiln 3 outer walls that links to each other respectively, feeding transfer roller 11 links to each other with lift 5, lift 5 links to each other with revolution distributor 4, be provided with opening for feed 17 on calcining kiln 3 tops, revolution distributor 4 links to each other with opening for feed 17; Be provided with grog outlet 18 in the lower end of calcining kiln 3, be provided with waste gas outlet 16 links to each other with water cooler 6 by waste pipe 12 on the top of calcining kiln 3, cooler outlet 19 links to each other with fly-ash separator 7 inlets by airduct 20, and fly-ash separator 7 exports with exhaust gas fan 9 under the chimney 8 and links to each other.
The water cooler main purpose is to reduce to enter the dust-precipitator temperature, because some efflorescence grog of suction function of exhaust gas fan plays herein with gas one, because the diameter of water cooler is far longer than the diameter of system's airduct, in water cooler owing to the reason wind speed decreased of hole enlargement, the efflorescence grog that the part particle is bigger settles down at this, dumper one is that the grog that this place settles down is drawn off, the 2nd, and play lock wind effect minimizing system and leak out, reduce the power consumption of exhaust gas fan.Calcining kiln 3 inner chambers are a cavity, divide three reaction zones, and top is raw material resolver 22, is solid-liquid mixing zone 23 in 22 bottoms, raw material resolver, is high-temperature liquid-phase reaction zone 24 in 23 bottoms, solid-liquid mixing zone; Calcining kiln 3 outer walls in raw material resolver 22 correspondences are provided with top air compartment 14, and correspondence is provided with the tangent line blast inlet 26 that tangentially distributes with calcining kiln 3 walls of 22 bottoms, raw material resolver and is connected with top air compartment 14; Calcining kiln 3 outer walls in high-temperature liquid-phase reaction zone 24 correspondences are provided with bottom air compartment 15, and correspondence is provided with the radially blast inlet 21 that radially distributes with calcining kiln 3 walls of high-temperature liquid-phase reaction zone 24 bottoms and is connected with bottom air compartment 15; Be provided with coal burner 25 in solid-liquid mixing zone 23 and high-temperature liquid-phase reaction zone 24 bottoms.Coal burner 25 is fixed on calcining kiln 3 outer walls, and the bocca 27 of coal burner 25 passes the calcining kiln wall, places in the calcining kiln 3.Coal burner 25 is an incendiary pencil, and the incendiary pencil tube head is that bocca 27 passes calcining kiln 3 walls and places in the calcining kiln 3.Coal burner 25 also can be many incendiary pencils such as two, three, four or five, and the incendiary pencil tube head is that bocca 27 passes calcining kiln 3 walls and places in the calcining kiln 3.Many incendiary pencils such as two, three, four or five are at calcining kiln 3 outer wall uniform distribution, and promptly the incendiary pencil tube head in calcining kiln 3 is that bocca 27 is evenly distributed in the calcining kiln 3.
Equally distributed tangent line blast inlet 26 can make into the material of calcining kiln 3 even in same section preheating, and it is stable to be beneficial to next step thermal technology, and it is to make to enter warm air generation eddy flow effect in the stove that tangential air intake mainly acts on, and increases the effective contact of warm air with material.
It is even in same section preheating that equally distributed radially blast inlet 21 will enter the material of calcining zone, and temperature improves rapidly when being beneficial to next step calcining, reduces fuel consumption.
Flyash and Wingdale grind qualified aluminum oxide raw material jointly by in the raw material feeding transfer roller 11 feeding lifts 5, are calcined in the feeding calcining kiln 3 uniformly by revolution distributor 4 again.Material carries out drying, dehydration and decomposition of limestone in the raw material resolver; Material carries out liquid phase and generates in the solid-liquid mixing zone, simultaneously C
2S forms; Material is completed into liquid state in the high-temperature liquid-phase reaction zone, all simultaneously chemical reactions are finished in this district.The used temperature of calcination process is provided by two cover coal burners 25.
Raw material are by the gravity of material motion continuous calcining from top to bottom.Adopt tangential way to spray into calcining kiln 3 from the secondary hot-air of cooler in 22 bottoms, raw material resolver through heating duct, make to produce the eddy flow effect in the kiln.Rely on the size control residence time of material in stove of eddy flow hot blast, material is calcined under suspended state, heat exchange is abundant like this, calcines effective.One secondary hot-air adopts radial manner to enter calcining kiln 3 in high-temperature liquid-phase reaction zone 24 bottoms in addition.Rely on the aweather gait of march of size control material of footpath.Guarantee material residence time of high-temperature liquid-phase reaction zone 24 to guarantee the quality of grog.The grog that calcining is good enters cooler through grog outlet 18.Waste gas in the calcining furnace is via water cooler 6, fly-ash separator 7 dischargings.
Embodiment 2: as shown in Figure 5, utilize the equipment of embodiment 1 to adopt scorification to prepare the method for producing aluminium oxide self powdering clinker, include following steps, (1), powder-grinding process, (2), the scorification calcination process gets alumina clinker, (3), refrigerating work procedure and make aluminium oxide self powdering clinker;
Wherein (1), powder-grinding process: with 20 tons in flyash, 60 tons in Wingdale is prepared burden and is ground;
(2), the scorification calcination process gets alumina clinker: the raw material that ground by step (1) gained are transported to the revolution distributor by the feeding transfer roller by lift, enter calcining kiln from the vertical opening for feed of calcining kiln again;
(a), enter the material of raw material resolver, calcining kiln top, in the raw material resolver, carry out drying, dehydration, the temperature of reaction in the raw material resolver is 800 ℃;
(b), enter solid-liquid mixing zone, calcining kiln middle part, material carries out liquid phase and generates in the solid-liquid mixing zone, simultaneously C through the raw material after decomposing in the raw material resolver
2S forms in the solid-liquid mixing zone, and its temperature of reaction is 1000 ℃;
(c), generate material through in the solid-liquid mixing zone, carrying out liquid phase, enter the high-temperature liquid-phase reaction zone of calcining kiln bottom, its range of reaction temperature is 1300 ℃, material is completed into liquid state in the high-temperature liquid-phase reaction zone, all simultaneously chemical reactions are finished in described high-temperature liquid-phase reaction zone, the final alumina clinker that generates enters the cooler cooling from the grog outlet of calcining furnace lower end;
(3), refrigerating work procedure and make aluminium oxide self powdering clinker: the alumina clinker that is obtained by the scorification calcination process slowly cools off at 350 ℃ in cooler, and be 30 minutes cooling time, C
2S is changed to the γ type by the β type, and obtains aluminium oxide self powdering clinker.
The secondary hot-air of secondary hot-air pipe comes from cooler.The secondary hot-air pipe enters the secondary hot-air of top air compartment, sprays into bottom, raw material resolver from the tangent line blast inlet.Make and produce the eddy flow effect in the kiln.Rely on the size control residence time of material in kiln of eddy flow hot blast, material is calcined under suspended state, heat exchange is abundant like this, calcines effective.Enter the secondary hot-air of bottom air compartment from described secondary hot-air pipe, spray into high-temperature liquid-phase reaction zone bottom from blast inlet radially.Rely on the aweather gait of march of size control material of footpath.Guarantee material residence time of high-temperature liquid-phase reaction zone to guarantee the quality of grog.Waste gas in the calcining kiln enters in the water cooler by waste pipe through waste gas outlet, enters fly-ash separator by airduct by the fly-ash separator inlet again, by exhaust gas fan by smoke stack emission.
Adopt scorification to prepare the method for producing aluminium oxide self powdering clinker and the aluminium oxide self powdering clinker that makes can be used for metallurgical-grade aluminum oxide.
Embodiment 3: as shown in Figure 5, utilize the equipment of embodiment 1 to adopt scorification to prepare the method for producing aluminium oxide self powdering clinker, include following steps, (1), powder-grinding process, (2), the scorification calcination process gets alumina clinker, (3), refrigerating work procedure and make aluminium oxide self powdering clinker;
Wherein (1), powder-grinding process: with 40 tons in flyash, 80 tons in Wingdale is prepared burden and is ground;
(2), the scorification calcination process gets alumina clinker: the raw material that ground by step (1) gained are transported to the revolution distributor by the feeding transfer roller by lift, enter calcining kiln from the vertical opening for feed of calcining kiln again;
(a), enter the material of raw material resolver, calcining kiln top, in the raw material resolver, carry out drying, dehydration, the temperature of reaction in the raw material resolver is 1000 ℃;
(b), enter solid-liquid mixing zone, calcining kiln middle part, material carries out liquid phase and generates in the solid-liquid mixing zone, simultaneously C through the raw material after decomposing in the raw material resolver
2S forms in the solid-liquid mixing zone, and its temperature of reaction is 1300 ℃;
(c), generate material through in the solid-liquid mixing zone, carrying out liquid phase, enter the high-temperature liquid-phase reaction zone of calcining kiln bottom, its range of reaction temperature is 1500 ℃, material is completed into liquid state in the high-temperature liquid-phase reaction zone, all simultaneously chemical reactions are finished in described high-temperature liquid-phase reaction zone, the final alumina clinker that generates enters the cooler cooling from the grog outlet of calcining furnace lower end;
(3), refrigerating work procedure and make aluminium oxide self powdering clinker: the alumina clinker that is obtained by the scorification calcination process slowly cools off at 550 ℃ in cooler, and be 50 minutes cooling time, C
2S is changed to the γ type by the β type, and obtains aluminium oxide self powdering clinker.
The secondary hot-air of secondary hot-air pipe comes from cooler.The secondary hot-air pipe enters the secondary hot-air of top air compartment, sprays into bottom, raw material resolver from the tangent line blast inlet.Make and produce the eddy flow effect in the stove.Rely on the size control residence time of material in stove of eddy flow hot blast, material is calcined under suspended state, heat exchange is abundant like this, calcines effective.Enter the secondary hot-air of bottom air compartment from described secondary hot-air pipe, spray into high-temperature liquid-phase reaction zone bottom from blast inlet radially.Rely on the aweather gait of march of size control material of footpath.Guarantee material residence time of high-temperature liquid-phase reaction zone to guarantee the quality of grog.Waste gas in the calcining kiln enters in the water cooler by waste pipe through waste gas outlet, enters fly-ash separator by airduct by the fly-ash separator inlet again, by exhaust gas fan by smoke stack emission.
Adopt scorification to prepare the method for producing aluminium oxide self powdering clinker and the aluminium oxide self powdering clinker that makes can be used for metallurgical-grade aluminum oxide.
Embodiment 4: as shown in Figure 5, utilize the equipment of embodiment 1 to adopt scorification to prepare the method for producing aluminium oxide self powdering clinker, include following steps, (1), powder-grinding process, (2), the scorification calcination process gets alumina clinker, (3), refrigerating work procedure and make aluminium oxide self powdering clinker;
Wherein (1), powder-grinding process: with 20 tons in flyash, 60 tons in Wingdale, 0.5 ton in fluorite, 0.8 ton of coke is prepared burden and is ground;
(2), the scorification calcination process gets alumina clinker: the raw material that ground by step (1) gained are transported to the revolution distributor by the feeding transfer roller by lift, enter calcining kiln from the vertical opening for feed of calcining kiln again;
(a), enter the material of raw material resolver, calcining kiln top, in the raw material resolver, carry out drying, dehydration, the temperature of reaction in the raw material resolver is 850 ℃;
(b), enter solid-liquid mixing zone, vertical calcining furnace middle part, material carries out liquid phase and generates in the solid-liquid mixing zone, simultaneously C through the raw material after decomposing in the raw material resolver
2S forms in the solid-liquid mixing zone, and its temperature of reaction is 1100 ℃;
(c), generate material through in the solid-liquid mixing zone, carrying out liquid phase, enter the high-temperature liquid-phase reaction zone of calcining kiln bottom, its range of reaction temperature is 1400 ℃, material is completed into liquid state in the high-temperature liquid-phase reaction zone, all simultaneously chemical reactions are finished in described high-temperature liquid-phase reaction zone, the final alumina clinker that generates enters the cooler cooling from the grog outlet of calcining kiln lower end;
(3), refrigerating work procedure and make aluminium oxide self powdering clinker: the alumina clinker that is obtained by the scorification calcination process slowly cools off at 400 ℃ in cooler, and be 35 minutes cooling time, C
2S is changed to the γ type by the β type, and obtains aluminium oxide self powdering clinker.
The secondary hot-air of secondary hot-air pipe comes from cooler.The secondary hot-air pipe enters the secondary hot-air of top air compartment, sprays into bottom, raw material resolver from the tangent line blast inlet.Make and produce the eddy flow effect in the kiln.Rely on the size control residence time of material in stove of eddy flow hot blast, material is calcined under suspended state, heat exchange is abundant like this, calcines effective.Enter the secondary hot-air of bottom air compartment from described secondary hot-air pipe, spray into high-temperature liquid-phase reaction zone bottom from blast inlet radially.Rely on the aweather gait of march of size control material of footpath.Guarantee material residence time of high-temperature liquid-phase reaction zone to guarantee the quality of grog.Waste gas in the calcining kiln enters in the water cooler by waste pipe through waste gas outlet, enters fly-ash separator by airduct by the fly-ash separator inlet again, by exhaust gas fan by smoke stack emission.
Adopt scorification to prepare the method for producing aluminium oxide self powdering clinker and the aluminium oxide self powdering clinker that makes can be used for metallurgical-grade aluminum oxide.
Embodiment 5: as shown in Figure 5, utilize the equipment of embodiment 1 to adopt scorification to prepare the method for producing aluminium oxide self powdering clinker, include following steps, (1), powder-grinding process, (2), the scorification calcination process gets alumina clinker, (3), refrigerating work procedure and make aluminium oxide self powdering clinker;
Wherein (1), powder-grinding process: with 40 tons in flyash, 80 tons in Wingdale, 1.5 tons in fluorite, 5.0 tons of cokes are prepared burden and are ground;
(2), the scorification calcination process gets alumina clinker: the raw material that ground by step (1) gained are transported to the revolution distributor by the feeding transfer roller by lift, enter calcining kiln from the vertical opening for feed of calcining kiln again;
(a), enter the material of raw material resolver, calcining kiln top, in the raw material resolver, carry out drying, dehydration, the temperature of reaction in the raw material resolver is 1000 ℃;
(b), enter solid-liquid mixing zone, calcining kiln middle part, material carries out liquid phase and generates in the solid-liquid mixing zone, simultaneously C through the raw material after decomposing in the raw material resolver
2S forms in the solid-liquid mixing zone, and its temperature of reaction is 1300 ℃;
(c), generate material through in the solid-liquid mixing zone, carrying out liquid phase, enter the high-temperature liquid-phase reaction zone of calcining kiln bottom, its range of reaction temperature is 1500 ℃, material is completed into liquid state in the high-temperature liquid-phase reaction zone, all simultaneously chemical reactions are finished in described high-temperature liquid-phase reaction zone, the final alumina clinker that generates enters the cooler cooling from the grog outlet of calcining kiln lower end;
(3), refrigerating work procedure and make aluminium oxide self powdering clinker: the alumina clinker that is obtained by the scorification calcination process slowly cools off at 550 ℃ in cooler, and be 50 minutes cooling time, C
2S is changed to the γ type by the β type, and obtains aluminium oxide self powdering clinker.
The secondary hot-air of secondary hot-air pipe comes from cooler.The secondary hot-air pipe enters the secondary hot-air of top air compartment, sprays into bottom, raw material resolver from the tangent line blast inlet.Make and produce the eddy flow effect in the kiln.Rely on the size control residence time of material in kiln of eddy flow hot blast, material is calcined under suspended state, heat exchange is abundant like this, calcines effective.Enter the secondary hot-air of bottom air compartment from described secondary hot-air pipe, spray into high-temperature liquid-phase reaction zone bottom from blast inlet radially.Rely on the aweather gait of march of size control material of footpath.Guarantee material residence time of high-temperature liquid-phase reaction zone to guarantee the quality of grog.Waste gas in the calcining kiln enters in the water cooler by waste pipe through waste gas outlet, enters fly-ash separator by airduct by the fly-ash separator inlet again, by exhaust gas fan by smoke stack emission.
Adopt scorification to prepare the method for producing aluminium oxide self powdering clinker and the aluminium oxide self powdering clinker that makes can be used for metallurgical-grade aluminum oxide.
Embodiment 6: as shown in Figure 5, utilize the equipment of embodiment 1 to adopt scorification to prepare the method for producing aluminium oxide self powdering clinker, include following steps, (1), powder-grinding process, (2), the scorification calcination process gets alumina clinker, (3), refrigerating work procedure and make aluminium oxide self powdering clinker;
Wherein (1), powder-grinding process: with 30 tons in flyash, 70 tons in Wingdale, 1.0 tons in fluorite, 3.0 tons of cokes are prepared burden and are ground;
(2), the scorification calcination process gets alumina clinker: the raw material that ground by step (1) gained are transported to the revolution distributor by the feeding transfer roller by lift, enter calcining kiln from the vertical opening for feed of calcining kiln again;
(a), enter the material of raw material resolver, calcining kiln top, in the raw material resolver, carry out drying, dehydration, the temperature of reaction in the raw material resolver is 900 ℃;
(b), enter solid-liquid mixing zone, calcining kiln middle part, material carries out liquid phase and generates in the solid-liquid mixing zone, simultaneously C through the raw material after decomposing in the raw material resolver
2S forms in the solid-liquid mixing zone, and its temperature of reaction is 1150 ℃;
(c), generate material through in the solid-liquid mixing zone, carrying out liquid phase, enter the high-temperature liquid-phase reaction zone of calcining kiln bottom, its range of reaction temperature is 1400 ℃, material is completed into liquid state in the high-temperature liquid-phase reaction zone, all simultaneously chemical reactions are finished in the high-temperature liquid-phase reaction zone, the final alumina clinker that generates enters the cooler cooling from the grog outlet of calcining kiln lower end;
(3), refrigerating work procedure and make aluminium oxide self powdering clinker: the alumina clinker that is obtained by the scorification calcination process slowly cools off at 400 ℃ in cooler, and be 40 minutes cooling time, C
2S is changed to the γ type by the β type, and obtains aluminium oxide self powdering clinker.
The secondary hot-air of secondary hot-air pipe comes from cooler.The secondary hot-air pipe enters the secondary hot-air of top air compartment, sprays into bottom, raw material resolver from the tangent line blast inlet.Make and produce the eddy flow effect in the stove.Rely on the size control residence time of material in stove of eddy flow hot blast, material is calcined under suspended state, heat exchange is abundant like this, calcines effective.Enter the secondary hot-air of bottom air compartment from the secondary hot-air pipe, spray into high-temperature liquid-phase reaction zone bottom from blast inlet radially.Rely on the aweather gait of march of size control material of footpath.Guarantee material residence time of high-temperature liquid-phase reaction zone to guarantee the quality of grog.Waste gas in the calcining kiln enters in the water cooler by waste pipe through waste gas outlet, enters fly-ash separator by airduct by the fly-ash separator inlet again, by exhaust gas fan by smoke stack emission.
Adopt scorification to prepare the method for producing aluminium oxide self powdering clinker and the aluminium oxide self powdering clinker that makes can be used for metallurgical-grade aluminum oxide.
The incoming stock abrasive dust mill of the raw material for preparing by proportioning also carries out homogenizing and handles.Aluminum oxide raw material qualified after the homogenizing are fed in the calcining kiln uniformly by the revolution distributor and calcine by in the raw material feeding transfer roller feeding lift.Drying, dehydration and decomposition of limestone are carried out in raw material resolver on calcining kiln top, and its temperature range is 800 ℃-1000 ℃; Solid-liquid mixing zone at the middle part, material are carried out liquid phase and are generated in this district, simultaneously C
2S forms, and its temperature range is 1000 ℃-1300 ℃; High-temperature liquid-phase reaction zone in the bottom, its temperature range are at 1300-1500 ℃, and material is completed into liquid state in this district, and all simultaneously chemical reactions are finished in this district.The used temperature of calcination process is provided by two cover coal burners.Wherein a cover coal burner is installed in bottom, solid-liquid mixing zone, and another set of coal burner is installed in high-temperature liquid-phase reaction zone bottom.
Raw material are by the gravity of material motion continuous calcining from top to bottom.Adopt tangential way to spray into calcining kiln through heating duct in bottom, raw material resolver from the secondary hot-air of cooler, make to produce the eddy flow effect in the kiln.Rely on the size control residence time of material in kiln of eddy flow hot blast, material is calcined under suspended state, heat exchange is abundant like this, calcines effective.One secondary hot-air adopts radial manner to enter calcining kiln in high-temperature liquid-phase reaction zone bottom in addition.Rely on the aweather gait of march of size control material of footpath.Guarantee material residence time of high-temperature liquid-phase reaction zone to guarantee the quality of grog.Outlet enters cooler to the good grog of calcining through grog.The grog cooling apparatus also can adopt the form of grate cooler and single cylinder cooling machine.Grog slowly cools off at 550 ℃-350 ℃ in cooler, and cooling time is at 30 minutes-50 minutes, C
2S is changed to the γ type by the β type, and alumina clinker carries out from efflorescence, and the grog that efflorescence is good is delivered to stripping Workshop Production metallurgical-grade aluminum oxide.
Claims (14)
1. the equipment of preparing aluminum oxide self-efflorescence grog by fusion method, it is characterized in that, it includes high-temperature blower, heating duct, calcining kiln, the revolution distributor, lift, water cooler, fly-ash separator, chimney, exhaust gas fan, feeding transfer roller and waste pipe, one end of described high-temperature blower links to each other with the secondary hot-air pipe, the other end of described high-temperature blower links to each other with the hot-blast outlet of the described heating duct of cooler, on the described secondary hot-air pipe, following two ends be connected in respectively described calcining kiln outer wall on, the bottom air compartment, described feeding transfer roller links to each other with described lift, described lift links to each other with described revolution distributor, be provided with opening for feed on described calcining kiln top, described revolution distributor links to each other with described opening for feed; Be provided with the grog outlet in the lower end of described calcining kiln, be provided with waste gas outlet links to each other with described water cooler by waste pipe on the top of described calcining kiln, described cooler outlet links to each other with described fly-ash separator inlet by airduct, and described fly-ash separator exports with described exhaust gas fan under the chimney and links to each other.
2. the equipment of a kind of preparing aluminum oxide self-efflorescence grog by fusion method as claimed in claim 1 is characterized in that, described water cooler is connected in dumper.
3. the equipment of a kind of preparing aluminum oxide self-efflorescence grog by fusion method as claimed in claim 1, it is characterized in that, described calcining kiln inner chamber is a cavity, divide three reaction zones, top is the raw material resolver, in bottom, described raw material resolver is the solid-liquid mixing zone, is the high-temperature liquid-phase reaction zone in bottom, described solid-liquid mixing zone; Described calcining kiln outer wall in described raw material resolver correspondence is provided with the top air compartment, is provided with the tangent line blast inlet that tangentially distributes corresponding to the calcining kiln wall of described raw material resolver bottom and is connected with described top air compartment; Described calcining kiln outer wall in described high-temperature liquid-phase reaction zone correspondence is provided with the bottom air compartment, is provided with the radially blast inlet that radially distributes corresponding to the calcining kiln wall of described high-temperature liquid-phase reaction zone bottom and is connected with described bottom air compartment; Be provided with coal burner in described solid-liquid mixing zone and described high-temperature liquid-phase reaction zone bottom.
4. the equipment of a kind of preparing aluminum oxide self-efflorescence grog by fusion method as claimed in claim 3 is characterized in that, described coal burner is fixed on described calcining kiln outer wall, and the bocca of described coal burner passes described calcining kiln wall, places in the described calcining kiln.
5. the equipment of a kind of preparing aluminum oxide self-efflorescence grog by fusion method as claimed in claim 2 is characterized in that, described coal burner is the incendiary pencil more than at least one or two, and described incendiary pencil tube head passes described calcining kiln wall and places in the described calcining kiln.
6. the equipment of a kind of preparing aluminum oxide self-efflorescence grog by fusion method as claimed in claim 5, it is characterized in that, described incendiary pencil more than two is at described calcining kiln outer wall uniform distribution, and promptly the described incendiary pencil tube head in described calcining kiln is evenly distributed in the described calcining kiln.
7. the equipment of a kind of preparing aluminum oxide self-efflorescence grog by fusion method as claimed in claim 3 is characterized in that, described tangent line blast inlet uniform distribution.
8. the equipment of a kind of preparing aluminum oxide self-efflorescence grog by fusion method as claimed in claim 3 is characterized in that, described radially blast inlet uniform distribution.
9. utilize any one described equipment of claim 1-8 to adopt scorification to prepare the method for producing aluminium oxide self powdering clinker, it is waited to levy and is, it includes following steps, (1), powder-grinding process, (2), the scorification calcination process gets alumina clinker, (3), refrigerating work procedure and make aluminium oxide self powdering clinker;
Wherein (1), powder-grinding process: following composition by weight ratio: flyash is 20-40, and Wingdale is 60-80, prepares burden and grinds;
(2), the scorification calcination process gets alumina clinker: the raw material that ground by step (1) gained are transported to described revolution distributor by described feeding transfer roller by lift, enter calcining kiln from the vertical opening for feed of described calcining kiln again;
(a), enter the material of raw material resolver, described calcining kiln top, in described raw material resolver, carry out drying, dehydration, the temperature of reaction in described raw material resolver is 800 ℃-1000 ℃;
(b), enter the solid-liquid mixing zone at described calcining kiln middle part, material carries out liquid phase and generates in described solid-liquid mixing zone, and its temperature of reaction is 1000 ℃-1300 ℃ through the raw material after decomposing in described raw material resolver;
(c), generate material through in described solid-liquid mixing zone, carrying out liquid phase, enter the high-temperature liquid-phase reaction zone of described calcining kiln bottom, its range of reaction temperature is 1300-1500 ℃, material is completed into liquid state in described high-temperature liquid-phase reaction zone, all simultaneously chemical reactions are finished in described high-temperature liquid-phase reaction zone, the final alumina clinker that generates enters the cooler cooling from the grog outlet of described calcining kiln lower end;
(3), refrigerating work procedure and make aluminium oxide self powdering clinker: the alumina clinker that is obtained by the scorification calcination process slowly cools off at 550 ℃-350 ℃ in cooler, and be 30 minutes-50 minutes cooling time, and obtain aluminium oxide self powdering clinker.
10. a kind of scorification that adopts as claimed in claim 9 prepares the method for producing aluminium oxide self powdering clinker, and it is waited to levy and is, in the powder-grinding process of step (1), also includes fluorite 0.5-1.5 by weight ratio, coke 0.8-5.0.
11. a kind of scorification that adopts as claimed in claim 9 prepares the method for producing aluminium oxide self powdering clinker, it is waited to levy and is, the secondary hot-air of described secondary hot-air pipe comes from cooler.
12. a kind of scorification that adopts as claimed in claim 9 prepares the method for producing aluminium oxide self powdering clinker, it is waited to levy and is, enters the secondary hot-air of top air compartment from described secondary hot-air pipe, sprays into bottom, described raw material resolver from described tangent line blast inlet.
13. a kind of scorification that adopts as claimed in claim 9 prepares the method for producing aluminium oxide self powdering clinker, it is waited to levy and is, enters the secondary hot-air of bottom air compartment from described secondary hot-air pipe, sprays into described high-temperature liquid-phase reaction zone bottom from described radially blast inlet.
14. a kind of scorification that adopts as claimed in claim 9 prepares the method for producing aluminium oxide self powdering clinker, it is waited to levy and is, waste gas in the described calcining furnace enters in the water cooler by waste pipe through waste gas outlet, enter fly-ash separator by airduct by fly-ash separator inlet again, by exhaust gas fan by smoke stack emission.
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| CN102976372B (en) * | 2012-11-06 | 2014-04-16 | 内蒙古蒙西鄂尔多斯铝业有限公司 | Method for producing alumina clinker |
| CN104235867B (en) * | 2014-10-11 | 2016-08-24 | 无锡华中科技有限公司 | The attachment structure of dust-removing flue |
| CN105060322B (en) * | 2015-07-14 | 2016-06-29 | 太原理工大学 | The device and method of aluminium oxide is extracted from flyash |
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| CN1287972A (en) * | 2000-11-01 | 2001-03-21 | 中国长城铝业中州铝厂 | Method for improving clinker alumina dissolution rate in alumina production by sintering method |
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