CN101913892A - Method for producing homogenized alumina - Google Patents
Method for producing homogenized alumina Download PDFInfo
- Publication number
- CN101913892A CN101913892A CN 201010272788 CN201010272788A CN101913892A CN 101913892 A CN101913892 A CN 101913892A CN 201010272788 CN201010272788 CN 201010272788 CN 201010272788 A CN201010272788 A CN 201010272788A CN 101913892 A CN101913892 A CN 101913892A
- Authority
- CN
- China
- Prior art keywords
- alumina
- pug
- add
- homogenized alumina
- kiln
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 title claims abstract description 24
- 238000004519 manufacturing process Methods 0.000 title abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 32
- 239000000463 material Substances 0.000 claims abstract description 15
- 238000000465 moulding Methods 0.000 claims abstract description 11
- 238000010304 firing Methods 0.000 claims abstract description 7
- 238000001694 spray drying Methods 0.000 claims abstract description 3
- 238000001035 drying Methods 0.000 claims description 14
- 238000000265 homogenisation Methods 0.000 claims description 13
- 239000004927 clay Substances 0.000 claims description 9
- 238000005507 spraying Methods 0.000 claims description 9
- 239000000758 substrate Substances 0.000 claims description 9
- 238000001238 wet grinding Methods 0.000 claims description 7
- 230000032683 aging Effects 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 4
- 239000012634 fragment Substances 0.000 claims description 4
- 238000013467 fragmentation Methods 0.000 claims description 4
- 238000006062 fragmentation reaction Methods 0.000 claims description 4
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 239000002270 dispersing agent Substances 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 239000002994 raw material Substances 0.000 abstract description 14
- 229910001570 bauxite Inorganic materials 0.000 abstract description 3
- 229910052593 corundum Inorganic materials 0.000 abstract description 2
- 239000010431 corundum Substances 0.000 abstract description 2
- 239000013078 crystal Substances 0.000 abstract description 2
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052863 mullite Inorganic materials 0.000 abstract description 2
- 239000011819 refractory material Substances 0.000 abstract description 2
- 230000009172 bursting Effects 0.000 abstract 1
- 239000000919 ceramic Substances 0.000 abstract 1
- 238000010298 pulverizing process Methods 0.000 abstract 1
- 238000001354 calcination Methods 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 238000005245 sintering Methods 0.000 description 3
- HIGRAKVNKLCVCA-UHFFFAOYSA-N alumine Chemical compound C1=CC=[Al]C=C1 HIGRAKVNKLCVCA-UHFFFAOYSA-N 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 206010024728 Lividity Diseases 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000004537 pulping Methods 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
Landscapes
- Compositions Of Oxide Ceramics (AREA)
Abstract
The invention discloses a method for producing a homogenized alumina material, and belongs to the technical field of ceramic and refractory materials. The homogenized alumina is prepared from high bauxite raw ore serving as a raw material by the steps of crushing, wet pulverizing, deironing, spray drying, molding, firing and the like; the method has the characteristics of simple process, easy operation, low cost, good mouldability and difficult bursting of the homogenized alumina after entering a kiln, and the like; and the homogenized alumina has the main crystalline phase of corundum and mullite, livid fracture, compact texture and regular crystal grain growth.
Description
Technical field
The invention belongs to pottery, technical field of refractory materials, relate to a kind of method of producing homogenized alumina.
Background technology
At present, the working method of bauxite chamotte is mainly taked the raw ore behind the pick is directly carried out the agglomerating method, is about to raw material and directly puts into kilns such as down-draft kiln, tunnel furnace, square kiln and carry out sintering; Also have raw ore is crushed to certain particle through behind the pick, in rotary kiln, carry out sintering.Though these methods are through the pick of raw material, because Al in the raw material piece
2O
3The content instability, cause sintering after clinker quality still inhomogeneous.For higher-grade bauxitic clay (Al
2O
3, greater than 85%), the homogeneity of burning back bauxitic clay grog is quite a lot of.
Be accompanied by application and the outlet of decades to the higher-grade bauxitic clay, present higher-grade alumina is fewer and feweri, utilizable be substantially in, low-grade resource, and the homogeneity of the alumina of these grades differs bigger.For the inhomogeneous adverse effect of reduction quality, make full use of these resources, the domestic research of carrying out homogenization material.
So-called alumina homogenization material promptly is to be raw material with natural raw bauxite, by the refractory raw material that explained hereafter such as homogenizing, moulding, calcining are come out, alumina homogenization material compare with raw ore calcining material have structure, performance and quality evenly, advantage such as stable.
A kind of production method of producing homogenization material is disclosed in the patent No. is 200810053036.0 document, it is to be that raw material adopts the kiln firing process with the alumine, through 1. homogenizing broken process, 2. the dry method powder-grinding process, 3. 6. wet-milling pulping process, 4. flotation operation, 5. press filtration, old operation squeeze mud, drying process and 7. multiple tracks treatment process such as calcination process.The described method of this patent, although the quality product of producing is better, complex procedures, cost are higher, have limited application.
The method of another kind of production alumina homogenization material is disclosed in the patent documentation of publication number CN101108776A, it is to be that raw material adopts the kiln firing process with the alumine, through 1. homogenizing broken process, 2. wet-milling, 3. ageing mixture, 4. drying, 5. bolting, 6. moulding and 7. operation such as calcining.Wherein sieve and limited granularity in the operation at 0.5-1.0mm, this production for alumina homogenization material not only is difficult to realize, and will increases cost greatly.
Summary of the invention
For the production technique of simplifying alumina homogenization material, be convenient to implement, reduce production costs, the present invention proposes novel process, novel method based on the production alumina homogenization material of spraying drying and dry-press process base substrate.Described method is: after the bauxitic clay rawore is broken into fritter, the water and the admixture that add 30-40%, with its wet grinding to the 300-500 order, the pug that obtains enters the ageing mixture pond, utilize tramp iron separator that pug is carried out deironing and handle, utilize spray-drying tower to carry out spraying drying again, obtain dry method straight forming behind the particulate state alumina, base substrate after the moulding burns till in high temperature kiln, can make alumina homogenization material.
After the fragmentation of described alumina rawore basically particle diameter be convenient to follow-up wet grinding not greater than the fragment of 10mm.
The purpose that adds admixture during described wet grinding is preferably organic dispersing agent for suppressing powder reuniting, and as polyvinyl alcohol etc., add-on must not surpass 0.5%.
After described pug carried out spraying drying, moisture content was less than 4%.
The described direct high pressure of false particulate state powder that utilizes spraying drying to form that is shaped to is pressed into suitable base substrate, in order to burning till.
Described high temperature kiln is for being best with the tunnel furnace, and firing temperature is 1500-1600 ℃.
Technique scheme of the present invention compared with prior art has the following advantages:
(1) operation is simple, easy handling, and cost is lower;
(2) spraying drying brings up a large amount of false particles, and the venting quality of the moment of false particle when moulding is very good, the slabbing when having avoided moulding, simultaneously, because moisture content is lower, so, through the molding of this operation not drying improved efficient greatly directly into kiln;
(3) avoided the base substrate of existing wet moulding to go into explosion problem in the kiln;
Embodiment
Embodiment 1
With aluminium content is that 73% bauxitic clay rawore is that the method for raw material production bauxitic clay homogenization material may further comprise the steps:
(1) with alumina raw material bulk crushing is the fragment of piece footpath less than 10mm.
(2) fragmentation is good raw material piece joins in the ball mill, adds the water of 30-40% and 0.2% polyvinyl alcohol simultaneously and grinds; Be ground to discharging behind the 300-500 order.
(3) ground pug is got to carried out deironing in the ageing mixture pond, it is 10000-12000 Gauss's wet method magnetic deironing device that magnetic intensity is adopted in deironing.
(4) the wet type pug after the deironing is got to carried out drying in the spray-dryer, dried pug moisture is less than 4%.
(5) utilize the direct high-pressure molding of powder after the spraying drying to be base substrate.
(6) the base substrate sign indicating number is directly pushed in the tunnel furnace on kiln car both can burn till, firing temperature is controlled at 1550-1600 ℃.
Embodiment 2
With aluminium content is that 67% bauxitic clay rawore is that the method for raw material production bauxitic clay homogenization material may further comprise the steps:
(1) with alumina raw material bulk crushing is the fragment of piece footpath less than 10mm.
(2) fragmentation is good raw material piece joins in the ball mill, adds the water of 30-40% and 0.2% polyvinyl alcohol simultaneously and grinds; Be ground to discharging behind the 300-500 order.
(3) ground pug is got to carried out deironing in the ageing mixture pond, it is 10000-12000 Gauss's wet method magnetic deironing device that magnetic intensity is adopted in deironing.
(4) the wet type pug after the deironing is got to carried out drying in the spray-dryer, dried pug moisture is less than 4%.
(5) utilize the direct high-pressure molding of powder after the spraying drying to be base substrate.
(6) the base substrate sign indicating number is directly pushed in the tunnel furnace on kiln car both can burn till, firing temperature is controlled at 1500-1550 ℃.
The product that adopts the present invention to produce, principal crystalline phase is corundum and mullite, fracture is lividity, the quality densification, crystal grain is grown rule, reaches domestic homogenization material level of producing.
Claims (5)
1. method of producing homogenized alumina, it is characterized in that: after the bauxitic clay rawore is broken into fritter, the water and the admixture that add 30-40%, to the 300-500 order, the pug that obtains enters the ageing mixture pond with its wet grinding, utilizes tramp iron separator that pug is carried out deironing and handles, utilize spray-drying tower to carry out spraying drying again, obtain dry method straight forming behind the particulate state alumina, the base substrate after the moulding burns till in high temperature kiln, can make alumina homogenization material.
2. according to claim 1, the fragment after the fragmentation of described alumina rawore, particle diameter be not basically greater than 10mm's.
3. according to claim 1, add admixture during described wet grinding and be preferably organic dispersing agent, as polyvinyl alcohol etc., add-on must not surpass 0.5%.
4. according to claim 1, after described pug carried out spraying drying, moisture content was less than 4%.
5. according to claim 1, described high temperature kiln is tunnel furnace preferably, and firing temperature is 1500-1600 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010272788 CN101913892B (en) | 2010-09-06 | 2010-09-06 | Method for producing homogenized alumina |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010272788 CN101913892B (en) | 2010-09-06 | 2010-09-06 | Method for producing homogenized alumina |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101913892A true CN101913892A (en) | 2010-12-15 |
| CN101913892B CN101913892B (en) | 2013-02-13 |
Family
ID=43321574
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010272788 Expired - Fee Related CN101913892B (en) | 2010-09-06 | 2010-09-06 | Method for producing homogenized alumina |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101913892B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102583470A (en) * | 2012-03-15 | 2012-07-18 | 龚亚云 | Preparation method of homogeneous bauxite applicable to smelting of brown fused alumina |
| CN102826862A (en) * | 2012-09-04 | 2012-12-19 | 山西新型炉业集团有限公司 | Raw material proportion and producing method for bauxite-based dense homogenized grog |
| CN105503219A (en) * | 2015-12-29 | 2016-04-20 | 通达耐火技术股份有限公司 | Alumina-base sintered corundum mullite and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1199033A (en) * | 1998-05-18 | 1998-11-18 | 武汉工业大学 | Fine alumina ceramic preparation process using natural bauxite |
| CN101108776A (en) * | 2007-08-18 | 2008-01-23 | 欧阳可成 | Technique of producing shaped aluminum basis equalized flame-proof raw material with wet process flouring-semidry process |
| CN101121604A (en) * | 2007-07-25 | 2008-02-13 | 濮阳濮耐高温材料（集团）股份有限公司 | Method for producing alumina homogenization material |
-
2010
- 2010-09-06 CN CN 201010272788 patent/CN101913892B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1199033A (en) * | 1998-05-18 | 1998-11-18 | 武汉工业大学 | Fine alumina ceramic preparation process using natural bauxite |
| CN101121604A (en) * | 2007-07-25 | 2008-02-13 | 濮阳濮耐高温材料（集团）股份有限公司 | Method for producing alumina homogenization material |
| CN101108776A (en) * | 2007-08-18 | 2008-01-23 | 欧阳可成 | Technique of producing shaped aluminum basis equalized flame-proof raw material with wet process flouring-semidry process |
Non-Patent Citations (1)
| Title |
|---|
| 《材料导报》 20091130 钟余发等 利用离心喷雾干燥制备球形粉体的工艺因素研究 147页至150页 1-5 第23卷, * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102583470A (en) * | 2012-03-15 | 2012-07-18 | 龚亚云 | Preparation method of homogeneous bauxite applicable to smelting of brown fused alumina |
| CN102583470B (en) * | 2012-03-15 | 2014-03-19 | 龚亚云 | Preparation method of homogeneous bauxite applicable to smelting of brown fused alumina |
| CN102826862A (en) * | 2012-09-04 | 2012-12-19 | 山西新型炉业集团有限公司 | Raw material proportion and producing method for bauxite-based dense homogenized grog |
| CN105503219A (en) * | 2015-12-29 | 2016-04-20 | 通达耐火技术股份有限公司 | Alumina-base sintered corundum mullite and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101913892B (en) | 2013-02-13 |
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Address after: 030100 Yangqu County, Shanxi province finance street, No., No. 5 Patentee after: Shanxi Gaoke Refractory Material Co.,Ltd. Address before: 030006 No. 280, Changzhi Road, hi tech Zone, Shanxi, Taiyuan Patentee before: Shanxi Gaoke Refractory Material Co.,Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130213 |