CN1911806A - Aluminium oxide self powdering clinker and its preparation method - Google Patents
Aluminium oxide self powdering clinker and its preparation method Download PDFInfo
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- CN1911806A CN1911806A CN 200610139420 CN200610139420A CN1911806A CN 1911806 A CN1911806 A CN 1911806A CN 200610139420 CN200610139420 CN 200610139420 CN 200610139420 A CN200610139420 A CN 200610139420A CN 1911806 A CN1911806 A CN 1911806A
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- aluminium oxide
- oxide self
- cooling
- self powdering
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- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 title claims abstract description 173
- 238000002360 preparation method Methods 0.000 title claims abstract description 7
- 238000000227 grinding Methods 0.000 title claims description 94
- 238000000034 method Methods 0.000 claims abstract description 129
- 238000001354 calcination Methods 0.000 claims abstract description 49
- 238000001816 cooling Methods 0.000 claims abstract description 43
- 239000010881 fly ash Substances 0.000 claims abstract description 25
- 239000000571 coke Substances 0.000 claims abstract description 17
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims abstract description 16
- 239000010436 fluorite Substances 0.000 claims abstract description 16
- 239000002994 raw material Substances 0.000 claims description 22
- 238000005245 sintering Methods 0.000 claims description 15
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 14
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 13
- 238000010583 slow cooling Methods 0.000 claims description 12
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims description 7
- 229910021502 aluminium hydroxide Inorganic materials 0.000 claims description 7
- 239000002817 coal dust Substances 0.000 claims description 7
- 239000003034 coal gas Substances 0.000 claims description 7
- 239000002131 composite material Substances 0.000 claims description 7
- 235000009508 confectionery Nutrition 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 7
- 239000000295 fuel oil Substances 0.000 claims description 7
- 238000003801 milling Methods 0.000 claims description 7
- 239000003345 natural gas Substances 0.000 claims description 7
- 238000001238 wet grinding Methods 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 2
- 238000010298 pulverizing process Methods 0.000 abstract description 20
- 239000000463 material Substances 0.000 abstract description 11
- 235000019738 Limestone Nutrition 0.000 abstract description 2
- 239000006028 limestone Substances 0.000 abstract description 2
- 238000002386 leaching Methods 0.000 abstract 1
- 239000002910 solid waste Substances 0.000 abstract 1
- 238000006253 efflorescence Methods 0.000 description 10
- 206010037844 rash Diseases 0.000 description 10
- 238000007363 ring formation reaction Methods 0.000 description 7
- 238000013467 fragmentation Methods 0.000 description 6
- 238000006062 fragmentation reaction Methods 0.000 description 6
- 239000002245 particle Substances 0.000 description 5
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 230000005021 gait Effects 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- -1 Wingdale Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Furnace Details (AREA)
Abstract
The present invention discloses one kind of self-atomized alumina clinker and its preparation process. The self-atomized alumina clinker is prepared with fly ash, limestone, fluorite and coke, and through the steps of pulverizing, calcining and cooling. The present invention has the advantages of wide calcining temperature range, well control of the clinker quality, fast material calcining process, high clinker quality, high clinker atomizing rate, raised alumina leaching out rate and utilization of solid waste from thermal power plant.
Description
Technical field:
The present invention relates to a kind of aluminium oxide self powdering clinker and preparation method thereof, especially relate to a kind of flyash and Wingdale of utilizing and produce aluminium oxide self powdering clinker and preparation method thereof.
Background technology:
Original patent " utilizing the method for flyash and Wingdale combination producing aluminum oxide and cement " by Mengxi Hi-Tech Group Corp., Ltd., Inner Mongolia's application, number of patent application is: 200410090949.1, what it produced the aluminum oxide employing is flyash, Wingdale two components batching, produced a lot of problems in actual production: 1, calcination temperature range is narrow, general calcination temperature range makes clinker quality be difficult to control between 30 ℃-50 ℃; 2, material high-temperature liquid-phase viscosity is big, causes material in calcination process, especially at clinkering zone ring formation, knot egg, makes that material gait of march in kiln is slow, and it is excessive that material adds the rate of filling in the kiln; 3, because the material viscosity is big, cause the frequent association material of grog, influenced the quality of grog; 4, alumina clinker from Pulverization ratio not high and also the fluctuation bigger.
Summary of the invention:
At the problems referred to above, the object of the present invention is to provide and a kind ofly can improve greatly from Pulverization ratio, and a kind of aluminium oxide self powdering clinker of aluminium oxide self powdering clinker constant product quality.
Another object of the present invention is to provide a kind of aluminium oxide self powdering clinker preparation method.
First purpose of the present invention is implemented by following technical scheme: a kind of aluminium oxide self powdering clinker, it includes the composition of following weight part proportioning: flyash is 20-40, Wingdale is 60-80, fluorite 0.5-1.5, coke 0.8-5.0, above-mentioned component is passed through powder-grinding process, calcination process, refrigerating work procedure gets aluminium oxide self powdering clinker.
By weight ratio, the most preferably value prescription of producing aluminium oxide self powdering clinker is that described flyash is 25-35, and Wingdale is 65-75, fluorite 0.5-1.0, coke 1.0-3.0.
Described aluminium oxide self powdering clinker can be used to prepare aluminium hydroxide or aluminum oxide.
Another object of the present invention is implemented by following technical scheme: prepare the method for above-mentioned aluminium oxide self powdering clinker, it includes following steps:
(1), powder-grinding process, (2), calcination process get alumina clinker, (3), refrigerating work procedure and make aluminium oxide self powdering clinker;
Wherein
(1), powder-grinding process: grind the mixed raw material with certain fineness in as above ratio, its fineness requirement 0.08 square hole sieve tails over less than 20%; The milling equipment that described powder-grinding process adopts is pipe mill or vertical mill.
(2), calcination process: in the raw material feeding calciner with step (1) powder-grinding process homogenizing, under 1150 ℃-1450 ℃, carry out the grog sintering; The equipment of described calcination process adopts dry-process rotory kiln, or wet process rotary kiln, or the semidrying rotary kiln, or wet grinding and dry burning, or shaft kiln, or tunnel furnace or down-draft kiln any possess the calciner of caking power.The sintering of described calcination process is raw materials used to be coal dust, or Sweet natural gas, or coal gas, or heavy oil, or any combustible matl of combustiblerefuse.
(3), refrigerating work procedure: described refrigerating work procedure is to carry out under the condition of slow cooling from atomizing: grog is slowly cooling in cooler, grog is that be 10-20 minute 1300 ℃ of cooling times that drop to 600 ℃ in the speed of cooling of cooling apparatus, and be 20-30 minute 600 ℃ of cooling times that drop to 100 ℃.Described refrigerating work procedure alumina clinker does not need fragmentation and grinding, and it reaches more than 90% from Pulverization ratio.The equipment that described refrigerating work procedure adopts is grate cooler, or single cylinder cooling machine, or planetary cooler or composite cooler.
The invention has the advantages that: 1, calcination temperature range not only obviously broadens, and can reach 300 ℃, makes clinker quality to be well controlled, and also reduction accordingly of calcining temperature, cuts down the consumption of energy greatly, thereby reduces cost; 2, it is big to have solved material high-temperature liquid-phase viscosity, and in calcination process, easily the phenomenon of ring formation, knot egg makes material gait of march in kiln accelerate, and to add the rate of filling suitable for material in the kiln; 3, make the material viscosity effectively diminish, solved the problem that grog is mixed (life, grog half-cooked) raw material, effectively improve the quality of grog; Operate more stable.4, make aluminium oxide self powdering clinker all by the 0.2mm square hole sieve, and 0.08mm square hole sieve percent of pass reaches more than 95%, simultaneous oxidation aluminium solubility rate also obviously improves.Utilize this patent can effectively solve solid waste---the utilization again of flyash of heat power plant's discharging simultaneously, turn waste into wealth.
Description of drawings:
Fig. 1 is a process flow sheet of the present invention.
Below in conjunction with accompanying drawing, the technology of flyash and limestone sintering being produced aluminium oxide self powdering clinker is elaborated.
Embodiment:
The present invention will be further described below in conjunction with drawings and Examples.
Embodiment 1: a kind of aluminium oxide self powdering clinker, and with 20 tons of flyash, 60 tons of Wingdales, 0.5 ton of fluorite, 0.8 ton of coke, by powder-grinding process, calcination process, refrigerating work procedure gets aluminium oxide self powdering clinker.Aluminium oxide self powdering clinker can be used to prepare aluminium hydroxide or aluminum oxide.
Prepare the method for above-mentioned aluminium oxide self powdering clinker, it includes following steps: (1), powder-grinding process, (2), calcination process, (3), refrigerating work procedure and make aluminium oxide self powdering clinker;
Wherein
(1), powder-grinding process: grind the mixed raw material with certain fineness in as above ratio, its fineness requirement 0.08 square hole sieve tails over less than 20%; The milling equipment that powder-grinding process adopts is pipe mill or vertical mill.
(2), calcination process: in the raw material feeding calciner with step (1) powder-grinding process homogenizing, under 1250 ℃-1350 ℃, carry out the grog sintering; The equipment of calcination process adopts dry-process rotory kiln, or wet process rotary kiln, or the semidrying rotary kiln, or shaft kiln, or tunnel furnace or down-draft kiln any possess caking power etc. calciner.The sintering of described calcination process is raw materials used to be coal dust, or Sweet natural gas, or coal gas or any combustible matl such as heavy oil or combustiblerefuse.
(3), refrigerating work procedure: grog is slowly cooling in cooler, and grog is that be 10-20 minute 1300 ℃ of cooling times that drop to 600 ℃ in the speed of cooling of cooling apparatus, and be 20-30 minute 600 ℃ of cooling times that drop to 100 ℃.Described refrigerating work procedure alumina clinker does not need fragmentation and grinding, is to carry out from efflorescence under the condition of slow cooling.It can reach more than 90% from Pulverization ratio.β-C under the condition of grog slow cooling
2S is to inert γ-C
2S changes, its volumetric expansion 10%, the particle about efflorescence to 20 μ voluntarily.The equipment that refrigerating work procedure adopts is grate cooler, or single cylinder cooling machine, or planetary cooler or composite cooler.
Embodiment 2: a kind of aluminium oxide self powdering clinker, and with 40 tons of flyash, 80 tons of Wingdales, 1.5 tons of fluorites, 5.0 tons of cokes, by powder-grinding process, calcination process, refrigerating work procedure gets aluminium oxide self powdering clinker.Aluminium oxide self powdering clinker can be used to prepare aluminium hydroxide or aluminum oxide.
Prepare the method for above-mentioned aluminium oxide self powdering clinker, it includes following steps: (1), powder-grinding process, (2), calcination process, (3), refrigerating work procedure and make aluminium oxide self powdering clinker;
Wherein
(1), powder-grinding process: grind the mixed raw material with certain fineness in as above ratio, its fineness requirement 0.08 square hole sieve tails over less than 8%; The milling equipment that powder-grinding process adopts all can for any of pipe mill or vertical mill.
(2), calcination process: in the raw material feeding calciner with step (1) powder-grinding process homogenizing, under 1150---1450 ℃, carry out the grog sintering; The equipment of calcination process adopts dry-process rotory kiln, or wet process rotary kiln, or the semidrying rotary kiln, or wet grinding and dry burning, or shaft kiln, or tunnel furnace or down-draft kiln any possess caking power etc. calciner.The sintering of described calcination process is raw materials used to be coal dust, or Sweet natural gas, or coal gas or heavy oil, or any combustible matl such as combustiblerefuse.
(3), refrigerating work procedure: grog is slowly cooling in cooler, and grog is that be 10-20 minute 1300 ℃ of cooling times that drop to 600 ℃ in the speed of cooling of cooling apparatus, and be 20-30 minute 600 ℃ of cooling times that drop to 100 ℃.The refrigerating work procedure alumina clinker does not need fragmentation and grinding, is to carry out from efflorescence under the condition of slow cooling.It reaches more than 90% from Pulverization ratio.β-C under the condition of grog slow cooling
2S is to inert γ-C
2S changes, its volumetric expansion 10%, the particle about efflorescence to 20 μ voluntarily.The equipment that refrigerating work procedure adopts is grate cooler, or single cylinder cooling machine, or planetary cooler or composite cooler.
Embodiment 3: a kind of aluminium oxide self powdering clinker, and with 30 tons of flyash, 70 tons of Wingdales, 1 ton of fluorite, 2.9 tons of cokes, by powder-grinding process, calcination process, refrigerating work procedure gets aluminium oxide self powdering clinker.Aluminium oxide self powdering clinker can be used to prepare aluminium hydroxide or aluminum oxide.
Prepare the method for above-mentioned aluminium oxide self powdering clinker, it includes following steps: (1), powder-grinding process, (2), calcination process, (3), refrigerating work procedure and make aluminium oxide self powdering clinker;
Wherein
(1), powder-grinding process: grind the mixed raw material with certain fineness in as above ratio, its fineness requirement 0.08 square hole sieve tails over less than 15%; The milling equipment that powder-grinding process adopts all can for any of pipe mill or vertical mill.
(2), calcination process: in the raw material feeding calciner with step (1) powder-grinding process homogenizing, under 1250-1450 ℃, carry out the grog sintering; The equipment of calcination process adopts dry-process rotory kiln, or wet process rotary kiln, or the semidrying rotary kiln, or wet grinding and dry burning, or shaft kiln, or tunnel furnace or down-draft kiln any possess caking power etc. calciner.The sintering of described calcination process is raw materials used to be coal dust, or Sweet natural gas, or coal gas or any combustible matl such as heavy oil or combustiblerefuse.
(3), refrigerating work procedure: grog is slowly cooling in cooler, and grog is that be 10-20 minute 1300 ℃ of cooling times that drop to 600 ℃ in the speed of cooling of cooling apparatus, and be 20-30 minute 600 ℃ of cooling times that drop to 100 ℃.The refrigerating work procedure alumina clinker does not need fragmentation and grinding, is to carry out from efflorescence under the condition of slow cooling.It reaches more than 90% from Pulverization ratio.β-C under the condition of grog slow cooling
2S is to inert γ-C
2S changes, its volumetric expansion 10%, the particle about efflorescence to 20 μ voluntarily.The equipment that refrigerating work procedure adopts is grate cooler, or single cylinder cooling machine, or planetary cooler or composite cooler.
Embodiment 4: a kind of aluminium oxide self powdering clinker, and with 25 tons of flyash, 65 tons of Wingdales, 0.5 ton of fluorite, 1.0 tons of cokes, by powder-grinding process, calcination process, refrigerating work procedure gets aluminium oxide self powdering clinker.Aluminium oxide self powdering clinker can be used to prepare aluminium hydroxide or aluminum oxide.
Prepare the method for above-mentioned aluminium oxide self powdering clinker, it includes following steps: (1), powder-grinding process, (2), calcination process, (3), refrigerating work procedure and make aluminium oxide self powdering clinker;
Wherein
(1), powder-grinding process: grind the mixed raw material with certain fineness in as above ratio, its fineness requirement 0.08 square hole sieve tails over less than 12%; The milling equipment that powder-grinding process adopts all can for any of pipe mill or vertical mill.
(2), calcination process: in the raw material feeding calciner with step (1) powder-grinding process homogenizing, under 1250-1450 ℃, carry out the grog sintering; The equipment of calcination process adopts dry-process rotory kiln, or wet process rotary kiln, or the semidrying rotary kiln, or wet grinding and dry burning, or shaft kiln, or tunnel furnace or down-draft kiln any possess caking power etc. calciner.The sintering of described calcination process is raw materials used to be coal dust, or Sweet natural gas, or coal gas or any combustible matl such as heavy oil or combustiblerefuse.
(3), refrigerating work procedure: grog is slowly cooling in cooler, and grog is that be 10-20 minute 1300 ℃ of cooling times that drop to 600 ℃ in the speed of cooling of cooling apparatus, and be 20-30 minute 600 ℃ of cooling times that drop to 100 ℃.The refrigerating work procedure alumina clinker does not need fragmentation and grinding, is to carry out from efflorescence under the condition of slow cooling.It reaches more than 90% from Pulverization ratio.β-C under the condition of grog slow cooling
2S is to inert γ-C
2S changes, its volumetric expansion 10%, the particle about efflorescence to 20 μ voluntarily.The equipment that refrigerating work procedure adopts is grate cooler, or single cylinder cooling machine, or planetary cooler or composite cooler.
Embodiment 5: a kind of aluminium oxide self powdering clinker, and with 35 tons of flyash, 75 tons of Wingdales, 1 ton of fluorite, 3.0 tons of cokes, by powder-grinding process, calcination process, refrigerating work procedure gets aluminium oxide self powdering clinker.Aluminium oxide self powdering clinker can be used to prepare aluminium hydroxide or aluminum oxide.
Prepare the method for above-mentioned aluminium oxide self powdering clinker, it includes following steps: (1), powder-grinding process, (2), calcination process, (3), refrigerating work procedure and make aluminium oxide self powdering clinker;
Wherein
(1), powder-grinding process: grind the mixed raw material with certain fineness in as above ratio, its fineness requirement 0.08 square hole sieve tails over less than 10%; The milling equipment that powder-grinding process adopts all can for any of pipe mill or vertical mill.
(2), calcination process: in the raw material feeding calciner with step (1) powder-grinding process homogenizing, under 1150-1450 ℃, carry out the grog sintering; The equipment of calcination process adopts dry-process rotory kiln, or wet process rotary kiln, or the semidrying rotary kiln, or wet grinding and dry burning, or shaft kiln, or tunnel furnace or down-draft kiln any possess caking power etc. calciner.The sintering of described calcination process is raw materials used to be coal dust, or Sweet natural gas, or coal gas or any combustible matl such as heavy oil or combustiblerefuse.
(3), refrigerating work procedure: grog is slowly cooling in cooler, and grog is that be 10-20 minute 1300 ℃ of cooling times that drop to 600 ℃ in the speed of cooling of cooling apparatus, and be 20-30 minute 600 ℃ of cooling times that drop to 100 ℃.The refrigerating work procedure alumina clinker does not need fragmentation and grinding, is to carry out from efflorescence under the condition of slow cooling.It reaches more than 90% from Pulverization ratio.β-C under the condition of grog slow cooling
2S is to inert γ-C
2S changes, its volumetric expansion 10%, the particle about efflorescence to 20 μ voluntarily.The equipment that refrigerating work procedure adopts is grate cooler, or single cylinder cooling machine, or planetary cooler or composite cooler.
Embodiment 6: followingly described in detail with the industrial test data:
Table one is 1340 ℃-1390 ℃ for flyash and Wingdale prepare aluminium oxide self powdering clinker in calcining temperature, crosses the Pulverization ratio and the industrial solubility rate of 0.2mm sieve and crosses the Pulverization ratio and the industrial solubility rate of 0.08mm sieve.
Table one
| Proportioning (weight) | Situation in the kiln | Calcination temperature range (℃) | 0.2mm sieve Pulverization ratio | Industry *Solubility rate | 0.08mm sieve Pulverization ratio | Industry # solubility rate |
| Flyash: Wingdale=25: 60 | The knot egg that varies in size is arranged in clinkering zone ring formation, the kiln | 1340-1390 | ?95％ | 60％ | 50％ | 75％ |
| Flyash: Wingdale=40: 75 | The knot egg that varies in size is arranged in clinkering zone ring formation, the kiln | 1340-1390 | ?96％ | 65％ | 55％ | 75％ |
| Flyash: Wingdale=30: 70 | The knot egg that varies in size is arranged in clinkering zone ring formation, the kiln | 1340-1390 | ?95％ | 62％ | 60％ | 77％ |
Table two be flyash, Wingdale, fluorite and coke to prepare aluminium oxide self powdering clinker be 1150 ℃-1450 ℃ in calcining temperature, cross the Pulverization ratio and the industrial solubility rate of 0.2mm sieve and cross the Pulverization ratio and the industrial solubility rate of 0.08mm sieve.
Table two
| Proportioning (weight) | Situation in the kiln | Calcination temperature range (℃) | 0.2mm sieve Pulverization ratio | Industry *Solubility rate | 0.08 sieve Pulverization ratio | Industry # solubility rate |
| Flyash: Wingdale: fluorite: coke=20: 60: 0.5: 0.8 | The clinkering zone ring formation obviously alleviates, and the knot grain is good in the kiln | 1250-1350 | ?100％ | 76％ | 95％ | 80％ |
| Flyash: Wingdale: fluorite: coke=40: 80: 1.5: 5.0 | The knot grain is fine in the kiln, and the kiln operation is easy to control | 1150-1450 | ?100％ | 78％ | 98％ | 88％ |
| Flyash: Wingdale: fluorite: coke=30: 70: 1.0: 2.9 | The knot grain is fine in the kiln, and the kiln operation is easy to control | 1250-1450 | ?100％ | 76％ | 95％ | 83.5％ |
| Flyash: Wingdale: fluorite: coke=25: 65: 0.5: 1.0 | The knot grain is fine in the kiln, and the kiln operation is easy to control | 1250-1450 | ?100％ | 76％ | 96％ | 85.5％ |
| Flyash: Wingdale: fluorite: coke=35: 75: 1.0: 3.0 | The knot grain is fine in the kiln, and the kiln operation is easy to control | 1150-1450 | ?100％ | 76％ | 95.5％ | 86.5％ |
Remarks: industrial solubility rate: in sodium carbonate solution concentration is 60g/l, and the stripping temperature is that 70 ℃, dissolution time are under 30 minutes the condition, to enter the ratio of the quality and the aluminum oxide total amount of aluminum oxide in the solution.
*The solubility rate of aluminum oxide when being illustrated in 0.2mm square hole sieve measurement Pulverization ratio
The solubility rate of aluminum oxide when # is illustrated in 0.08mm square hole sieve measurement Pulverization ratio
Can obviously find out adding fluorite and coke from table one and table two after, the calcination temperature range of alumina clinker obviously increases, and has solved the problem of ring formation knot egg in the kiln simultaneously, makes that operation is more stable.Obviously improving of grog from Pulverization ratio and digesting efficiency of alumina.
Claims (8)
1, a kind of aluminium oxide self powdering clinker, it includes the composition of following weight part proportioning: flyash is 20-40, Wingdale is 60-80, fluorite 0.5-1.5, coke 0.8-5.0 passes through powder-grinding process with above-mentioned component, calcination process, refrigerating work procedure gets aluminium oxide self powdering clinker.
2, a kind of aluminium oxide self powdering clinker as claimed in claim 1 is characterized in that, by weight ratio, described flyash is 25-35, and Wingdale is 65-75, fluorite 0.5-1.0, coke 1.0-3.0.
3, a kind of aluminium oxide self powdering clinker as claimed in claim 1 or 2 is characterized in that, described aluminium oxide self powdering clinker can be used to prepare aluminium hydroxide or aluminum oxide.
4, the method for the above-mentioned aluminium oxide self powdering clinker of preparation is characterized in that it includes following steps:
(1), powder-grinding process, (2), calcination process get alumina clinker, (3), refrigerating work procedure and make aluminium oxide self powdering clinker;
Wherein
(1), powder-grinding process: grind the mixed raw material with certain fineness in as above ratio, its fineness requirement 0.08 square hole sieve tails over less than 20%;
(2), calcination process: in the raw material feeding calciner with step (1) powder-grinding process homogenizing, under 1150 ℃-1450 ℃, carry out the grog sintering;
(3), refrigerating work procedure: described refrigerating work procedure is to carry out under the condition of slow cooling from atomizing: grog is slowly cooling in cooler, grog is that be 10-20 minute 1300 ℃ of cooling times that drop to 600 ℃ in the speed of cooling of cooling apparatus, and be 20-30 minute 600 ℃ of cooling times that drop to 100 ℃.
5, a kind of method for preparing aluminium oxide self powdering clinker as claimed in claim 4, it is characterized in that, the equipment of described calcination process adopts dry-process rotory kiln, or wet process rotary kiln, or semidrying rotary kiln, or wet grinding and dry burning, or shaft kiln, or tunnel furnace or down-draft kiln any possess the calciner of caking power.
6, a kind of method for preparing aluminium oxide self powdering clinker as claimed in claim 4 is characterized in that, the sintering of described calcination process is raw materials used to be coal dust, or Sweet natural gas, or coal gas or heavy oil or any combustible matl of combustiblerefuse.
7, a kind of method for preparing aluminium oxide self powdering clinker as claimed in claim 4 is characterized in that, the milling equipment that described powder-grinding process adopts is pipe mill or vertical mill.
8, a kind of method for preparing aluminium oxide self powdering clinker as claimed in claim 4 is characterized in that, the equipment that described refrigerating work procedure adopts is grate cooler, or single cylinder cooling machine, or planetary cooler or composite cooler.
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| CN102951663A (en) * | 2012-11-06 | 2013-03-06 | 内蒙古蒙西鄂尔多斯铝业有限公司 | Method for producing alumina clinker |
| CN102976372A (en) * | 2012-11-06 | 2013-03-20 | 内蒙古蒙西鄂尔多斯铝业有限公司 | Method for producing alumina clinker |
| CN105836773A (en) * | 2016-03-24 | 2016-08-10 | 中国铝业股份有限公司 | Preparation method and device of aluminum oxide clinker, and the aluminum oxide clinker |
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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 |
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| CN109704373B (en) * | 2019-03-13 | 2021-06-08 | 国家电投集团山西铝业有限公司 | Aluminum oxide clinker sintering process and aluminum oxide clinker |
| CN114644466A (en) * | 2022-04-07 | 2022-06-21 | 武汉理工大学 | Method for preparing low-calcium self-pulverization clinker and co-producing sulfuric acid by using phosphogypsum |
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| CN100344541C (en) | 2007-10-24 |
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