CN1047271A - High-alumina Mg-Al spinel brick and production method thereof - Google Patents
High-alumina Mg-Al spinel brick and production method thereof Download PDFInfo
- Publication number
- CN1047271A CN1047271A CN 89105082 CN89105082A CN1047271A CN 1047271 A CN1047271 A CN 1047271A CN 89105082 CN89105082 CN 89105082 CN 89105082 A CN89105082 A CN 89105082A CN 1047271 A CN1047271 A CN 1047271A
- Authority
- CN
- China
- Prior art keywords
- alumina
- magnesia
- spinel brick
- fine powder
- production method
- 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.)
- Pending
Links
Images
Landscapes
- Compositions Of Oxide Ceramics (AREA)
Abstract
The present invention relates to a kind of refractory materials and production method thereof, be specially adapted to produce high-alumina Mg-Al spinel brick and the production method thereof that cement kiln is used.It contains Al
2O
3〉=78%, it burns till at 1280-1350 ℃ with the alumine of 65-70% and the magnesia of 30-35%.Its void content height has the ability that satisfies cement kiln front and back two transitional zone temperature resistance abilities and be imbued with anti-failure crack expansion, wear-resisting, good heat insulating, cost is low, low price, but easy fired are suitable for fire-resistant factory in vast small towns and medium-sized and small enterprises and utilize the production of clay brickkiln.
Description
The present invention relates to a kind of refractory materials and production method thereof, be specially adapted to produce cement kiln high-alumina Mg-Al spinel brick and production method thereof.
At present former and later two transitional zone liners of domestic cement kiln more than 90% be phosphoric acid in conjunction with high alumina brick (phosphoric acid brick), or aluminum phosphate is in conjunction with high alumina brick (abrasive brick), the consumption of these two kinds of bricks accounts for 45% of liner fireproof material total burn-off.Though phosphoric acid brick and abrasive brick have the good hot and cold crushing strength of the cold-resistant urgency of anti-urgency, but its subzero treatment technology is being covered, and the slabbing, the irony that occur in the production process are too assorted, degradation hidden danger under the raw material quality, make the quality product shakiness, cause the inner liner of rotary kiln life-span to be fluctuateed thereupon.The phosphoric acid price is quick-fried rise after, this subzero treatment technology is the quite wide safety limit that quality standard provides, and its raw material is used tanglewracked, downtrending appears in the cement kiln liner life-span.
The objective of the invention is to replace phosphoric acid brick and abrasive brick with high-alumina Mg-Al spinel brick, to reverse the only situation of the used single variety of phosphoric acid brick and abrasive brick of former and later two transitional zones of cement kiln, the manufacture method of this novel refractory is simple, and cost is low, low price.But this brick easy fired, its good heat insulating, normal temperature strength and loading softening begin indexs such as temperature and are better than phosphoric acid brick and abrasive brick.
The object of the present invention is achieved like this: the component of this high-alumina Mg-Al spinel brick is by the Al that contains that accounts for batching total amount 95～99%
2O
3〉=80%, volume density 〉=2.8g/cm
3High alumina rock soil grog and account for the one-level brickmaking magnesia that contains MgO 〉=91% of batching total amount 5～1%, under 1280～1350 ℃ temperature, burn till.Its production method is with above-mentioned 7～3mm(or 6～2.5mm) of being processed into, less than 3mm(or less than 2.5mm) bauxite chamotte of two kinds of granularities is as aggregate, the common grinding of part bauxite chamotte and magnesia is become, less than 0.088mm, and sieve is measured the batching fine powder greater than 95% down, and the magnesia ratio is 3～15% in the fine powder.Earlier the particulate state bauxite chamotte being added wet the stone roller during batch mixing, is 1.15～1.20g/cm with proportion
3Paper pulp is made wedding agent, and add-on is 3～4% of the batching gross weight, wet mixing 1～1.5 minute, pour mixing fine powders into, rolled 8～10 minutes, then mechanical pressing, work in-process are dry under 50～80 ℃, go into kiln to residual water-content less than 1% o'clock, be incubated 6～8 hours and burn till under 1280～1350 ℃ of temperature.
Because the present invention adopts batching form and 1280～1350 ℃ of novel procesies of burning till of above-mentioned novelty, make goods of the present invention not only have the stable very high intensity that is better than the phosphoric acid brick, and having very high void content and a large amount of little pores of dead front type, this is the key character that is imbued with the goods heat-insulating property and in use has stronger cracking resistance line expanding ability.But because easy fired, vast medium-sized and small enterprises can utilize the clay brick klining to become comparatively senior goods with small towns refractory materials enterprise, so manufacturing cost is well below phosphoric acid brick and abrasive brick.
Below in conjunction with drawings and Examples the present invention is further described.
Fig. 1 is a manufacturing process principle schematic of the present invention.
Fig. 2 is a phase change synoptic diagram in the sintering process of the present invention.
Fig. 3～4th, goods lithofacies photo of the present invention.
Describe concrete composition of the present invention and production method in detail according to Fig. 1～4.High-alumina Mg-Al spinel brick of the present invention is burnt till under 1280～1350 ℃ temperature by 95～99% bauxite chamotte that accounts for the material gross weight and 5～1% one-level brickmaking magnesia.
The present invention utilizes the principle realization easy fired that changes phase place in the sintering process and reaches expection microstructure purpose.Its principle is such, at Al
2O
3-SiO
2In-MgO the three component system (Fig. 1), form with a 1 ' material of indicating.The crystallization finishing temperature is 1578 ℃, the amount of liquid phase that can be calculated when reaching home by lever rule is 18%, if be equivalent to 1 ' material do matrix, admixtion is formed and is transferred to 1 position, though the crystallization terminal point also is 1578 ℃, but the amount of liquid phase the when amount of liquid phase when reaching home has only 7%, 1800 ℃ just 20%, with 1 ' compare, the temperature resistance ability approximately improves 200 ℃, promptly batching always is formed at 1 point, matrix composition 1 ' batching, can make firing temperature reduce about 200 ℃.
The sintering of refractory materials at first carries out in fine powder, the present invention utilize just this phenomenon finish by 1 ' o'clock to the sintering process of transfer in 1 o'clock, this transfer the present invention is referred to as phase change in the sintering process.As shown in Figure 2, M ' material is equivalent to the upper left M ' black round dot of indicating among the figure, and it at first produces about 15～25% liquid phase (accompanying drawing 4) under sintering temperature, because the effect of interfacial tension, liquid and gas move, spread along the contact surface with aggregate, absorb Al simultaneously
2O
3Melt that the body group of components is proportional to change, so, participate in agglomerating material composition and leave original position M ', move to the M point along the dotted arrow direction indication, suck back liquid phase simultaneously, under the sufficient situation of firing condition, arrive M point position (accompanying drawing 3), liquid phase is all sucked back, and crystallization is a high temperature solid-state.The processing temperature not high (900～1350 ℃) of transitional zone before and after the cement kiln, be save energy, the design of product sintering degree of the present invention only is just right, waits until that the phase change degree reaches the M position in the use, and therefore given product performance index is not best.
Production method of the present invention is described in detail in detail below.
Ingredient requirement
Bauxite chamotte: Al
2O
3〉=80%, density 〉=2.8g/cm
3
One-level brickmaking magnesia: MgO 〉=91%
With bauxite chamotte be processed into 7～3mm(or 6～2.5mm), less than 3mm(or less than 2.5mm) two kinds of granularities, two kinds of granularities are sieved, determine＞7mm, 7～5mm, 5～3mm, 3～1mm,＜1mm size compositions at different levels, the batching fine powder is formed by above-mentioned bauxite chamotte and the common grinding of magnesia, its granularity is measured down greater than 95% less than the 0.088mm sieve, magnesia deal 3～15% in the powder mix, two kinds of material are grinding separately also, mix according to the above ratio and use, but want thorough mixing even.Adopt proportion 1.15～1.20g/cm
3Paper pulp is made wedding agent, earlier two kinds of particles is added wet the stone roller in the ratio of calculating during batch mixing, calculates the main principle of aggregate with addition of ratio, is that the intermediate particle of control＜1.0mm reaches 17～22% of batching total amount, is the best with 20%.Two kinds of particulate aggregates account for 65～70% of batching total amount, add 3～4% paper pulp that account for particle in the batching, fine powder gross weight, wet mixing 1～1.5 minute then, pour mixing fine powders into, its consumption accounts for 35～30% of batching total amount, continues to roll 8～10 minutes, goes out to grind standby.Adopt 300T friction press or the moulding of 260T high-stroke friction press, work in-process are dry under 50～80 ℃, go into kiln moisture less than 1%, and 1280～1350 ℃ of firing temperatures are incubated 6～8 hours, and goods burn till the back outward appearance and are beige.
The minimum index of product is:
Al
2O
3%≥78
MgO% 0.9～5
Void content % 〉=24
Density g/cm
3〉=2.55
Normal temperature strength MPa 〉=70
The soft beginning temperature of lotus ℃ 〉=1380
Heavily burn 1400 ℃ * 2h and be not more than-0.5
1100 ℃ * water of thermal shock, inferior 〉=10
Most preferred embodiment
To contain Al
2O
381.7%, density 2.79g/cm
3Bauxite chamotte be processed into 7-3mm,＜two kinds of aggregates of 3mm, measure 7-5mm, 5-3mm, 3-1mm,＜1mm size compositions at different levels, as calculated＜3mm particle add-on 36%, 7-3mm add-on 32%, in the compound＜the 1mm particle account for the batching total amount 19%, magnesia accounts for 3% in the powder mix, high aluminium material accounts for 97%, and grinding fineness is less than 0.088mm, screen over-size 3%, by the thin principle in thick back is reinforced earlier, proportion is 1.2g/cm when mixing
3Paper pulp add-on 3.5% is mixed 9 minutes time only, moulding on the 260T high-stroke friction press, and work in-process descended dry 24 hours at 60 ℃, and residual water-content 1.1% is at 50M
3Burn till 1320 ℃ in the down-draft kiln, be incubated 6 hours.After testing, yield rate 96% in the product, void content 27%, and normal temperature strength 73MPa, 1380 ℃ of the soft beginning temperature of lotus, 1500 ℃ * 2h heavily burns contraction-9.9%, thermal shock (1100 ℃ * water) 15 times.
Claims (3)
1, a kind of cement kiln refractory--high-alumina Mg-Al spinel brick is characterized in that being burnt till under 1280～1350 ℃ temperature by 95～99% bauxite chamotte that accounts for the material gross weight and 5～1% one-level brickmaking magnesia.
2, high-alumina Mg-Al spinel brick according to claim 1 is characterized in that raw materials used middle bauxite chamotte contains Al
2O
3〉=80%, volume density 〉=2.8g/cm
3, contain MgO 〉=91% in the one-level brickmaking magnesia.
3, the production method of the described high-alumina Mg-Al spinel brick of a kind of claim 1 is characterized in that at first will containing Al
2O
3〉=80%, density 〉=2.8g/cm
3Bauxite chamotte be processed into 7-3mm(or 6-2.5mm), less than 3mm(or less than 2.5mm) two kinds of particles, again the common grinding of part bauxite chamotte and magnesia is become less than the fine powder of measuring under the 0.088mm sieve greater than 95%, the ratio of magnesia in fine powder is 3-15%, earlier particulate state alumine aggregate is added wet the stone roller during batch mixing, with proportion 1.15～1.20g/cm
3Paper pulp is made wedding agent, add-on is 3～4% of the batching total amount, and fine powder is poured in wet mixing 1～1.5 minute into, rolled 8～10 minutes, go out to grind standby, the ratio of particle and fine powder is 65～70: 35～30, and is dry under 50～80 ℃ of conditions behind the mechanical pressing, go into kiln moisture less than 1%, firing temperature is 1280～1350 ℃, is incubated 6～8 hours, promptly can be made into high-alumina Mg-Al spinel brick.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89105082 CN1047271A (en) | 1989-05-19 | 1989-05-19 | High-alumina Mg-Al spinel brick and production method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89105082 CN1047271A (en) | 1989-05-19 | 1989-05-19 | High-alumina Mg-Al spinel brick and production method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1047271A true CN1047271A (en) | 1990-11-28 |
Family
ID=4855853
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89105082 Pending CN1047271A (en) | 1989-05-19 | 1989-05-19 | High-alumina Mg-Al spinel brick and production method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1047271A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104276832A (en) * | 2014-09-28 | 2015-01-14 | 青岛康合伟业商贸有限公司 | Novel magnesium/aluminum refractory material |
| CN104311044A (en) * | 2014-09-28 | 2015-01-28 | 青岛康合伟业商贸有限公司 | Magnesium aluminate spinel and preparation method thereof |
| CN104557062A (en) * | 2013-10-16 | 2015-04-29 | 太原科技大学 | Spinel casting sand and preparation method thereof |
| CN104944974A (en) * | 2015-05-26 | 2015-09-30 | 柳州市亿廷贸易有限责任公司 | Preparation method of refractory brick for hot-blast furnaces |
| CN104944973A (en) * | 2015-05-26 | 2015-09-30 | 柳州市亿廷贸易有限责任公司 | Refractory brick for hot air furnace |
| CN106588054A (en) * | 2016-12-19 | 2017-04-26 | 钦州市科学技术开发中心 | Composite refractory brick and preparation method thereof |
| CN107382345A (en) * | 2017-08-18 | 2017-11-24 | 郑州大学 | A kind of MgO MA aggregate processing methods of micro-nano spinelle toughness reinforcing |
| CN114671671A (en) * | 2022-03-31 | 2022-06-28 | 安徽瑞泰新材料科技有限公司 | Lightweight refractory material, and preparation method and application thereof |
-
1989
- 1989-05-19 CN CN 89105082 patent/CN1047271A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104557062A (en) * | 2013-10-16 | 2015-04-29 | 太原科技大学 | Spinel casting sand and preparation method thereof |
| CN104276832A (en) * | 2014-09-28 | 2015-01-14 | 青岛康合伟业商贸有限公司 | Novel magnesium/aluminum refractory material |
| CN104311044A (en) * | 2014-09-28 | 2015-01-28 | 青岛康合伟业商贸有限公司 | Magnesium aluminate spinel and preparation method thereof |
| CN104944974A (en) * | 2015-05-26 | 2015-09-30 | 柳州市亿廷贸易有限责任公司 | Preparation method of refractory brick for hot-blast furnaces |
| CN104944973A (en) * | 2015-05-26 | 2015-09-30 | 柳州市亿廷贸易有限责任公司 | Refractory brick for hot air furnace |
| CN106588054A (en) * | 2016-12-19 | 2017-04-26 | 钦州市科学技术开发中心 | Composite refractory brick and preparation method thereof |
| CN107382345A (en) * | 2017-08-18 | 2017-11-24 | 郑州大学 | A kind of MgO MA aggregate processing methods of micro-nano spinelle toughness reinforcing |
| CN107382345B (en) * | 2017-08-18 | 2020-09-01 | 郑州大学 | Preparation method of micro-nano spinel toughened MgO-MA aggregate |
| CN114671671A (en) * | 2022-03-31 | 2022-06-28 | 安徽瑞泰新材料科技有限公司 | Lightweight refractory material, and preparation method and application thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105980330B (en) | Stoneware refractory product and preparation method thereof and application | |
| CN101555151B (en) | Corundum fireproof ball used for ball-type hot-blast stove and preparation method thereof | |
| CN103130524B (en) | Energy-saving light cordierite-mullite kiln furnace material, kiln furnace and preparation method of material | |
| CN104591749B (en) | A kind of super-high heat-conductive silica brick and preparation method thereof for oven wall of coke oven carbonization chamber | |
| BR112020005054A2 (en) | process for the production of a porous sintered magnesium oxide, mixture for the production of a fire-resistant crude ceramic product with a granulation of sintered magnesium oxide, such a product, as well as a process for its production, coating of an industrial furnace and kiln industrial | |
| CN100372808C (en) | Making process of zirconium-containing magnesia brick | |
| CN102336539A (en) | Waste utilization regeneration baking-free magnesia chrome brick and preparation method thereof | |
| CN1050591C (en) | Fired microporous carbon-aluminium brick | |
| CN1047271A (en) | High-alumina Mg-Al spinel brick and production method thereof | |
| CN104671804A (en) | High-alumina plastic refractory and preparation method thereof | |
| JPH054934B2 (en) | ||
| CN1096503A (en) | Compact high-alumina refractory brick | |
| CN101550019A (en) | Composite fire resistant ball for ball type hot-air stove and method for preparing same | |
| Suvorov et al. | High-temperature heat-insulating materials based on vermiculite | |
| CN1740115A (en) | Sailon corundum refractory material for permeable ladle stopper and its prepn process | |
| CN115435597A (en) | Preparation method of low-heat-conductivity multilayer composite magnesium aluminate spinel brick for rotary kiln | |
| EP0531130A2 (en) | Improved magnesite-spinel refractory product and method for making same | |
| US2068411A (en) | High-pbebsure nonplastic refrac | |
| CN100582056C (en) | Thermal shock resistant burner brick and preparation method thereof | |
| US1994377A (en) | Refractory material and method of making the same | |
| CN1094703A (en) | Dinas-carbofrax brick | |
| CN1072402A (en) | Magnalium picotite sand and preparation method | |
| CN116589287B (en) | Low-cost and long-service-life sliding plate brick and preparation method thereof | |
| JPS6024069B2 (en) | Method for manufacturing MgO-Al↓2O↓3 quality fireproof insulation brick | |
| JPS5920630B2 (en) | Manufacturing method of magnesia chromium fired firebrick |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |