CN100462336C - Technique of producing shaped aluminum basis equalized flame-proof raw material with wet process flouring-semidry process - Google Patents
Technique of producing shaped aluminum basis equalized flame-proof raw material with wet process flouring-semidry process Download PDFInfo
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- CN100462336C CN100462336C CNB2007101392382A CN200710139238A CN100462336C CN 100462336 C CN100462336 C CN 100462336C CN B2007101392382 A CNB2007101392382 A CN B2007101392382A CN 200710139238 A CN200710139238 A CN 200710139238A CN 100462336 C CN100462336 C CN 100462336C
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- 238000000034 method Methods 0.000 title claims abstract description 39
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 18
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 16
- 239000002994 raw material Substances 0.000 title claims description 38
- 239000000428 dust Substances 0.000 claims abstract description 17
- 238000005516 engineering process Methods 0.000 claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000001035 drying Methods 0.000 claims description 26
- 238000000465 moulding Methods 0.000 claims description 23
- 238000005245 sintering Methods 0.000 claims description 21
- 238000013467 fragmentation Methods 0.000 claims description 14
- 238000006062 fragmentation reaction Methods 0.000 claims description 14
- 238000003825 pressing Methods 0.000 claims description 12
- 239000004927 clay Substances 0.000 claims description 8
- 230000032683 aging Effects 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 abstract description 18
- 238000004519 manufacturing process Methods 0.000 abstract description 13
- 239000011819 refractory material Substances 0.000 abstract description 5
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 238000012797 qualification Methods 0.000 abstract description 4
- 239000011449 brick Substances 0.000 abstract description 2
- 238000010521 absorption reaction Methods 0.000 abstract 2
- 229910001570 bauxite Inorganic materials 0.000 abstract 1
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 238000000227 grinding Methods 0.000 abstract 1
- 238000007493 shaping process Methods 0.000 abstract 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 15
- 239000004411 aluminium Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 230000018044 dehydration Effects 0.000 description 3
- 238000006297 dehydration reaction Methods 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000265 homogenisation Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 238000000748 compression moulding Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 238000002560 therapeutic procedure Methods 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
Landscapes
- Compositions Of Oxide Ceramics (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention relates to the technology field of the refractory materials, in particular to the process of producing the shaping aluminum base homogenized refractory materials by wet powdering hyphen semidry process. The invention solves the problems of low bulk density, larger water absorption, long process flow, low qualification rate of the product production and short service life of the process method products of the aluminum base refractory materials. The raw bauxite is crushed, added with 35 per cent to 40 per cent water and crushed to 250 items to 400 items, and then is dried with water controlled at 4 per cent to 7 per cent, and sintered to gain the finished product and materials with high volume density, low water absorption and high qualification rate of the product production. The products of the invention have consistent specification and content index, which can be directly used as abrasive bricks. The dust does not exist during the production and transportation, which is beneficial for environment protection. Meanwhile, the invention has shorter process flow, reduces the energy consumption and has lower cost and obvious advantages of quality and price competition in the domestic market and the international market, which has broad market prospect and development space.
Description
Technical field
The present invention relates to technical field of refractory materials, be specially the technology that shaped aluminum homogenizing refractory raw material is produced in a kind of wet method powdered-semi-dry pressing.
Background technology
At present, the working method of aluminium base raw material for refractory 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, according to requirement of client finished product is passed through screening more then.Aforesaid method belongs to traditional direct sintering, though the pick (mainly being to pick out material piece and the problematic material piece of order appearance quality index that does not bake) of grog behind the pick of process raw material and the sintering, but because the content inconsistent (ore bed difference or mining area difference) of aluminium sesquioxide in the raw material piece, clinker quality is still inhomogeneous after causing sintering, when being used for the production of articles of refractory materials, can directly influence the qualification rate of fire resistive material product, and influence its use properties; And direct sintering, can not normalized production, globule size is inhomogeneous, need reprocess, and producing, easily producing dust in the transportation, has polluted environment.
Along with of the raising of high temperature industry to refractory quality requirement and performance index, particularly country encourages synthetic material, the exploitation of homogenization material and production, the homogenization material manufacturing enterprise that indivedual certain scales occur, adopt vacuum to squeeze the mud technology, be wet powder-making and wet therapy forming process, the main technique flow process is that the water that will add about 40% behind the raw material crushing carries out abrasive dust, filter-press dehydration (moisture is 18-26%), moulding, drying, sintering, there is following problem in this working method in actual production: 1, because in the production process, drying process is placed on after the molding procedure, moisture content of material height during moulding; Simultaneously, forming pressure is low, makes that the goods exhaust effect behind the filter-press dehydration is bad; When abrasive dust and drying and granulating, the control of the size range of raw material is improper, and the long-pending density of material block was low after these three reasons caused moulding, and water-intake rate is big, and the contraction ratio of material piece is big when drying, sintering, and the material piece very easily bursts; 2, owing to adopt filter-press dehydration (being the first step drying) before the moulding, moisture so also need to carry out the second step drying before the sintering, makes technical process longer still at 18-26% when making moulding, and energy consumption is higher; And the crowded mud method of vacuum also exists the product that obtains not carry out normalized production by customer requirements.
Summary of the invention
There is A1 in the raw material in the present invention for the working method that solves existing aluminium base raw material for refractory adopts direct sintering
20
3Problems such as content is inhomogeneous and cause job efficiency low, and work-ing life is short; And adopt vacuum to squeeze mud, have moulding after the long-pending density of material block low, water-intake rate is big, technical process is long, the problem that energy consumption is high provides the technology of a kind of wet method powdered-semi-dry pressing production shaped aluminum homogenizing refractory raw material.
The present invention adopts following technical scheme to realize: the technology of shaped aluminum homogenizing refractory raw material is produced in wet method powdered-semi-dry pressing, may further comprise the steps, (1) the bauxitic clay raw material is carried out fragmentation, its particle size after cracking is not strict with, just the bulk raw material crushing is become fritter, be convenient to next step abrasive dust, and the content of aluminium sesquioxide can be determined in the bauxitic clay raw material according to the user to the requirement of aluminium sesquioxide content in the finished product; (2) water of adding 35-40% in the good raw material of above-mentioned fragmentation adopts abrasive dust equipment that it is crushed to the 250-400 order then, is the wet method abrasive dust, and described water is process water, and abrasive dust equipment can adopt the general various types of equipment in this area; (3) ageing mixture (being that nature is stacked) is 48-72 hour, and this is the process of a homogenizing moisture, and the moisture in the powder is uniformly dispersed; (4) under 180-400 ℃ temperature, carry out drying, control moisture is at 4-7%, naturally form particulate state in the drying process, drying plant can adopt the general various types of equipment in this area, the adjusting of moisture is mainly relevant with temperature, humidity, about 5.5%, and the north is controlled at 6-6.5% in southern moisture controlled; (5) bolting, make granularity be controlled at 0.5-1mm, under the prerequisite of above-mentioned rational abrasive dust granularity, drying temperature and moisture content, powder particles after drying is generally at 0.5-1mm, by bolting to remove the bigger material of minute quantity particle, and expect body in this size range, and, can make the venting quality of material body reach optimum regime in conjunction with following moulding drawing method; (6) moulding is adopted dissimilar molding devices according to the requirement to the finished product shape, and forming pressure is 800-2000Kg/cm
2Because the material body carries out drying before moulding, with moisture controlled at 4-7%, be semi-dry pressing, avoided just carrying out the drawback that drying causes after the vacuum extrusion method employing compression moulding (moulding moisture is 18-26%, is wet moulding), and the present invention adopts the high pressure moulding, increased the exhaust effect of material body in pressing process, the product water-intake rate is reduced, volume density increases; (7) be 1480-1550 ℃ of following sintering in temperature, can be according to the content difference of aluminium sesquioxide in the product, in this scope, choose different sintering temperatures, be incubated 7-10 hour then, get product, be incubated for some time again after reaching sintering temperature, purpose is to allow heat penetrate the material body, reaches tight burning.
The aluminium radical equalization refractory raw material that adopts processing method of the present invention to make, according to the difference of aluminium sesquioxide content, the performance index of each product are as shown in table 1:
Table 1
| The bright title of product | AL 2O 3％ ≥ | Si0 2％ ≤ | Fe 2O 3％ ≤ | R x0％ ≤ | Volume density 〉= | Water-intake rate %≤ |
| AL85 | 85-85.5 | 8 | 1.5 | 5 | 3.2 | 1.5 |
| AL86 | 86-86.5 | 8 | 1.5 | 5 | 3.3 | 1.5 |
| AL87 | 87-87.5 | 7 | 1.5 | 4 | 3.4 | 1.5 |
| AL88 | 88-88.5 | 6 | 1.5 | 4 | 3.45 | 1 |
| AL90 | 90-90.5 | 5 | 1.5 | 4 | 3.5 | 1 |
In 87% aluminum content in the product, adopt processing method of the present invention finished product that makes and the main quality index that adopts traditional resulting finished product of direct sintering to compare, as shown in table 2:
Table 2
| Performance index | Direct sintering | Technology of the present invention |
| Volume density | 3.3 | 3.4 |
| Water-intake rate | 3％ | 1.5％ |
| Product qualified rate | 90％ | 97％ |
As seen from the above table, the present invention is by taking following three kinds of approach, that is, the one, the material body carries out drying before moulding, greatly reduce moulding moisture; The 2nd, the pressure of increase moulding; The 3rd, rationally control the granularity that body is expected in abrasive dust granularity and dry back, make the volume of material density height that makes, water-intake rate is low, this raw material is used for the production qualification rate height of goods, it is a kind of best approach for preparing the aluminium radical equalization raw material, and the product goodsization that obtain of the present invention, specification unanimity, content's index unanimity, after burning till, do not need to sieve specification, such as can directly being used as abrasive brick, and do not have dust in the production and transport process, help environmental protection, technical process of the present invention simultaneously is shorter, has reduced energy consumption, and cost is lower.
Embodiment
Embodiment 1:
Wet method powdered-semi-dry pressing is produced the technology of shaped aluminum homogenizing refractory raw material, may further comprise the steps, and (1) is that 72.5% bauxitic clay raw material carry out fragmentation with aluminium sesquioxide content; (2) water of adding 35% in the good raw material of above-mentioned fragmentation adopts abrasive dust equipment that it is crushed to 250 orders then; (3) ageing mixture is 48 hours; (4) carry out drying under 180 ℃ temperature, control moisture forms particulate state naturally 4% in the drying process; (5) bolting makes granularity be controlled at 0.5mm; (6) moulding, forming pressure are 800Kg/cm
2(7) be 1480 ℃ of following sintering in temperature, be incubated 7 hours then, promptly get aluminium sesquioxide content and be 85.5% finished product, water-intake rate is 1%, and volume density is 3.20.
Embodiment 2:
Wet method powdered-semi-dry pressing is produced the technology of shaped aluminum homogenizing refractory raw material, may further comprise the steps, and (1) is that 73% bauxitic clay raw material carry out fragmentation with aluminium sesquioxide content; (2) water of adding 40% in the good raw material of above-mentioned fragmentation adopts abrasive dust equipment that it is crushed to 400 orders then; (3) ageing mixture is 72 hours; (4) carry out drying under 400 ℃ temperature, control moisture forms particulate state naturally 7% in the drying process; (5) bolting makes granularity be controlled at 1mm; (6) moulding, forming pressure are 2000Kg/cm
2(7) be 1550 ℃ of following sintering in temperature, be incubated 10 hours then, promptly get aluminium sesquioxide content and be 86% finished product, water-intake rate is 1.5%, and volume density is 3.35.
Embodiment 3:
Wet method powdered-semi-dry pressing is produced the technology of shaped aluminum homogenizing refractory raw material, may further comprise the steps, and (1) is that 74% bauxitic clay raw material carry out fragmentation with aluminium sesquioxide content; (2) water of adding 38% in the good raw material of above-mentioned fragmentation adopts abrasive dust equipment that it is crushed to 300 orders then; (3) ageing mixture is 55 hours; (4) carry out drying under 250 ℃ temperature, control moisture forms particulate state naturally 5% in the drying process; (5) bolting makes granularity be controlled at 0.8mm; (6) moulding, forming pressure are 1500Kg/cm
2(7) be 1500 ℃ of following sintering in temperature, be incubated 8 hours then, promptly get aluminium sesquioxide content and be 87% finished product, water-intake rate is 1.2%, and volume density is 3.40.
Embodiment 4:
Wet method powdered-semi-dry pressing is produced the technology of shaped aluminum homogenizing refractory raw material, may further comprise the steps, and (1) is that 75% bauxitic clay raw material carry out fragmentation with aluminium sesquioxide content; (2) water of adding 36% in the good raw material of above-mentioned fragmentation adopts abrasive dust equipment that it is crushed to 350 orders then; (3) ageing mixture is 60 hours; (4) carry out drying under 350 ℃ temperature, control moisture forms particulate state naturally 6% in the drying process; (5) bolting makes granularity be controlled at 0.7mm; (6) moulding, forming pressure are 1200Kg/cm
2(7) be 1520 ℃ of following sintering in temperature, be incubated 9 hours then, promptly get aluminium sesquioxide content and be 88% finished product, water-intake rate is 1.1%, and volume density is 3.45.
Embodiment 5:
Wet method powdered-semi-dry pressing is produced the technology of shaped aluminum homogenizing refractory raw material, may further comprise the steps, and (1) is that 76% bauxitic clay raw material carry out fragmentation with aluminium sesquioxide content; (2) water of adding 39% in the good raw material of above-mentioned fragmentation adopts abrasive dust equipment that it is crushed to 275 orders then; (3) ageing mixture is 63 hours; (4) carry out drying under 180-400 ℃ temperature, control moisture forms particulate state naturally 5% in the drying process; (5) bolting makes granularity be controlled at 0.9mm; (6) moulding, forming pressure are 1850Kg/cm
2(7) be 1495 ℃ of following sintering in temperature, be incubated 10 hours then, promptly get aluminium sesquioxide content and be 89% finished product, water-intake rate is 1%, and volume density is 3.50.
Claims (1)
1. the technology that shaped aluminum homogenizing refractory raw material is produced in wet method powdered-semi-dry pressing is characterized in that may further comprise the steps,
(1) the bauxitic clay raw material is carried out fragmentation;
(2) water of adding 35-40% in the good raw material of above-mentioned fragmentation adopts abrasive dust equipment that it is crushed to the 250-400 order then;
(3) ageing mixture 48-72 hour;
(4) carry out drying under 180-400 ℃ temperature, control moisture forms particulate state naturally at 4-7% in the drying process;
(5) bolting makes granularity be controlled at 0.5-1mm;
(6) moulding, forming pressure are 800-2000Kg/cm
2
(7) be 1480-1550 ℃ of following sintering in temperature, be incubated 7-10 hour then, get product.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101392382A CN100462336C (en) | 2007-08-18 | 2007-08-18 | Technique of producing shaped aluminum basis equalized flame-proof raw material with wet process flouring-semidry process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101392382A CN100462336C (en) | 2007-08-18 | 2007-08-18 | Technique of producing shaped aluminum basis equalized flame-proof raw material with wet process flouring-semidry process |
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| CN101108776A CN101108776A (en) | 2008-01-23 |
| CN100462336C true CN100462336C (en) | 2009-02-18 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101913892B (en) * | 2010-09-06 | 2013-02-13 | 山西高科耐火材料股份有限公司 | Method for producing homogenized alumina |
| CN102010211B (en) * | 2010-10-11 | 2013-04-17 | 山西高科耐火材料股份有限公司 | Method for producing alumina mullite homogenizing material |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060058173A1 (en) * | 2003-05-08 | 2006-03-16 | Otkrytoe Aktsionernoe Obschestvo "Borovichsky Kombinat Ogneuporov" | Mixture for fabrication of fireproof high-strength spherical granules and the method of their manufacture |
| CN1844051A (en) * | 2006-04-27 | 2006-10-11 | 武汉科技大学 | A composite electro-fusing refractory material and method for preparing the same |
| CN1844014A (en) * | 2006-04-29 | 2006-10-11 | 中国地质大学（北京） | High-intensity corrosion-proof chimney lining brick made by mullite and method for manufacturing the same |
| CN1911864A (en) * | 2006-09-05 | 2007-02-14 | 杨德报 | Fire resisting plate and its preparation method |
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- 2007-08-18 CN CNB2007101392382A patent/CN100462336C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060058173A1 (en) * | 2003-05-08 | 2006-03-16 | Otkrytoe Aktsionernoe Obschestvo "Borovichsky Kombinat Ogneuporov" | Mixture for fabrication of fireproof high-strength spherical granules and the method of their manufacture |
| CN1844051A (en) * | 2006-04-27 | 2006-10-11 | 武汉科技大学 | A composite electro-fusing refractory material and method for preparing the same |
| CN1844014A (en) * | 2006-04-29 | 2006-10-11 | 中国地质大学（北京） | High-intensity corrosion-proof chimney lining brick made by mullite and method for manufacturing the same |
| CN1911864A (en) * | 2006-09-05 | 2007-02-14 | 杨德报 | Fire resisting plate and its preparation method |
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Denomination of invention: Technique of producing shaped aluminum basis equalized flame-proof raw material with wet process flouring-semidry process Effective date of registration: 20160108 Granted publication date: 20090218 Pledgee: Chengdu high investment financing Company limited by guarantee Pledgor: Ouyang Kecheng Registration number: 2016990000013 |
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