CN1275907C - Mullite composite brick for basic rotary kiln - Google Patents
Mullite composite brick for basic rotary kiln Download PDFInfo
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- CN1275907C CN1275907C CN 200510069172 CN200510069172A CN1275907C CN 1275907 C CN1275907 C CN 1275907C CN 200510069172 CN200510069172 CN 200510069172 CN 200510069172 A CN200510069172 A CN 200510069172A CN 1275907 C CN1275907 C CN 1275907C
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- powder
- rotary kiln
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Abstract
The present invention relates to a composite mullite brick for basic rotary kilns, which belongs to the refractory material field. The composite mullite brick is made by material components according for the following weight percentage and sulfite lye according for 4 to 6% of the total weight: 55 to 65% of extra-grade high-aluminum bauxite clinker skeletal material whose grain size is from 0 to 7mm, 15 to 30% of extra-grade bauxite clinker fine powder whose grain size is less than or equal to 0.088mm, 5 to 10% of three-grade bauxite clinker fine powder whose grain size is less than or equal to 0.088mm, 4 to 8% of alpha Al2O3 powder whose grain size is less than or equal to 0.074mm, 3 to 4% of ZrO2 powder whose grain size is less than or equal to 0.088mm, and 3 to 6% of white clay powder. The present invention has the advantages that the highest environment temperature of the product is allowed to 1600 DEG C; the composite mullite brick has the characteristics of high intensity, high soft load, high basic resistance and high heat shock under the load state of 1400 DEG C to 1530 DEG C and is easy to stick basic kiln skin. The present invention does not flake off, damage, draw and fall after long-term work in a rotary kiln; consequently, the service life of the rotary kiln is prolonged in large amplitude. The present invention not only can save raw materials, fuels and labor cost, but also can enhance product quality and enhance the device operating ratio of the rotary kiln in large amplitude.
Description
Technical field
The present invention relates to a kind of mullite composite brick for basic rotary kiln, belong to fire resisting material field.
Background technology
The clinkering zone of common alkaline rotary kiln and the refractory lining brick that excessively band (as cement rotary kiln, alumina clinker sintering rotary kiln etc.) is commonly used have Mg-Al spinel brick, magnesia chrome brick, phosphoric acid salt high alumina brick etc.These materials in use have a common greatest weakness, are exactly that thermal shock resistance is poor, cause their work-ing life on alkaline rotary kiln all not very long, greatly about 3-6 month.Because kiln is shorter age, and production cost is increased substantially, and has caused input-output efficiency poor, has wasted fuel, has consumed manpower cost and starting material, has reduced output, has also reduced the quality of product, also bring many difficulties for production management.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of mullite composite brick for basic rotary kiln of thermal shock resistance excellence.
For achieving the above object, the present invention is by the following technical solutions:
Mullite composite brick for basic rotary kiln, make by material component that accounts for following weight percent content and the lignosulfite that accounts for material gross weight 4-6%:
Special grade bauxite grog aggregate 50-65%, granularity is smaller or equal to 7mm;
High grade bauxite grog fine powder 15-30%, granularity is smaller or equal to 0.088mm (180 order);
3 grades of alumina chamotte fine powder 5-10%, granularity is smaller or equal to 0.088mm;
α-Al
2O
3Powder 4-8%, granularity is smaller or equal to 0.074mm (200 order);
ZrO
2Powder 3-4%, granularity is smaller or equal to 0.088mm;
White clay powder 3-6%, granularity is smaller or equal to 0.088mm.
Prescription of the present invention is theoretical and liquid phase reparation Design Theory according to tiny crack, its parameters choose the restriction that is subjected to these two factors.The raising of a certain material consumption might make a certain index improve, but other index of correlation is descended, so choosing of each amounts of components strictly be limited in certain scope.As: ZrO
2Powder too much can produce excessive blocking-up crackle, has also strengthened and make it repair difficulty; α-Al
2O
3Powder can be controlled the amount of liquid phase that produces in the brick.Amount of liquid phase is too much, can reduce the thermal shock of material, weakens the blocking effect that tiny crack produces.And the performance of the skeleton supporting role of Mo Laishi is to depend on the mullite structure and the distribution mode thereof of burning till the middle matrix part that produces, and therefore, must strictly control the amount and its distribution mode of each component in prescription.The crucial part of this prescription just is to embody the repair of tiny crack effect and liquid phase, and material can be used in the high thermal shock environment of high-temperature alkaline for a long time.
Advantage of the present invention is: the present invention is primarily aimed at the high temperature kiln that working temperature is in 1400 ℃～1530 ℃ for a long time, 1600 ℃ of the highest permissions of its envrionment temperature.Under the strong attitude of 1400 ℃～1530 ℃ loads, this product has the characteristics of high strength, high RUL, high alkali resistance, high thermal shock, has the characteristic of alkaline kliner coating easy to hang simultaneously.Especially the excellent properties of its high thermal shock, make it can be in rotary kiln long term operation and do not peel off, damaged, brick-dropping, thereby prolong life-span of rotary kiln significantly, can save material, fuel, artificial cost, and can improve the quality of product.
The invention will be further described below in conjunction with embodiment, and the replacement that is equal to of every any this area of carrying out according to the disclosed content of the present invention all belongs to protection scope of the present invention.
Embodiment
Embodiment 1
One. prescription:
Special grade bauxite grog aggregate 60%, size-grade distribution are smaller or equal to 0.5mm 15%; 0.5-1mm 12%; 1-2mm 8%; 2-3mm 3%; 3-5mm 7%; 5-7mm 15%;
High grade bauxite grog fine powder 19%, granularity is smaller or equal to 0.088mm;
3 grades of alumina chamotte fine powder 8%, granularity is smaller or equal to 0.088mm;
α-Al
2O
3Powder 5%, granularity is smaller or equal to O.074mm;
ZrO
2Powder 3.5%, granularity is smaller or equal to 0.088mm;
White clay powder 4.5%, granularity is smaller or equal to 0.088mm;
Lignosulfite, 4% of above-mentioned material gross weight, density are 1.23g/cm
3Lignosulfite is looked the temperature situation can suitably adjust its add-on, and setting range is the 4-6% of material gross weight.
Two. production technique
(1) batching: the bauxite chamotte aggregate gradation mixes
α-Al
2O
3Powder+ZrO
2Powder+white clay powder is mixed in proportion
Lignosulfite is prepared in proportion
(2) mix: earlier combined aggregate and good wet stone roller of lignosulfite adding of outfit were mixed 5 minutes, adding mixing fine powders again mixed 15 minutes jointly, can make qualified pug.The standard of qualified pug is crisp and not diffusing, and is sticking and not soft.After pug prepares, need ageing mixture three hours.
(3) moulding: the close 2.85-3.0g/cm that is decided to be of the body of work in-process brick
3, press tonnage is decided to be 400t～630t, makes the pressurization number of times through after the pressure testing, and is strict with unified substance and the machine-shaping of pressurization number of times.Allow plus tolerance not allow secondary tolerance during processing.The mould augmentation coefficient is-0.2%～-0.3%.
(4) drying: control dry-heat air inlet temperature is 50-60 ℃, and temperature out is 110-120 ℃, and be 24 hours time of drying.
(5) burn till: the firing temperature of composite mullite brick is decided to be 1550 ℃.Down-draft kiln and tunnel furnace all can be fired.
Embodiment 2
One. prescription:
Special grade bauxite grog aggregate 57%, size-grade distribution are 0.1-1mm 15%; 1-2mm 11%; 2-3mm5%; 3-5mm 11%; 5-7mm 15%;
High grade bauxite grog fine powder 23%, granularity is smaller or equal to 0.088mm;
3 grades of alumina chamotte fine powder 8%, granularity is smaller or equal to 0.088mm;
α-Al
2O
3Powder 4%, granularity is smaller or equal to 0.074mm;
ZrO
2Powder 3.1%, granularity is smaller or equal to 0.088mm;
White clay powder 4.9%, granularity is smaller or equal to 0.088mm;
Lignosulfite, 5.2% of above-mentioned material gross weight, density are 1.23g/cm
3(its weight is meter in addition).
Two. preparation technology: with embodiment 1.
Embodiment 3
One. prescription:
Special grade bauxite grog aggregate 53.5%, size-grade distribution are 0.1-1mm 8%; 1-2mm 12%; 2-3mm 6.5%; 3-5mm 11%; 5-7mm 16%;
High grade bauxite grog fine powder 21.4%, granularity is smaller or equal to 0.088mm;
3 grades of alumina chamotte fine powder 10%, granularity is smaller or equal to 0.088mm;
α-Al
2O
3Powder 5.6%, granularity is smaller or equal to 0.074mm;
ZrO
2Powder 4%, granularity is smaller or equal to 0.088mm;
White clay powder 5.5%, granularity is smaller or equal to 0.088mm;
Lignosulfite, 5.5% of above-mentioned material gross weight, density are 1.23g/cm
3(its weight is meter in addition).
Two. preparation technology: with embodiment 1.
Embodiment 4. technique effects
Identify that through inspection center of national metallurgical industry engineering quality supervision master station technical indicator of the present invention is as follows:
Apparent porosity % 17.3
Thermal shock resistance (1100 ℃, water-cooled) is inferior to 90
Heavily burn line change (1500 ℃ * 2h) less than 1.0
Lotus soft (0.2MPa) ℃ T
1Greater than 1565 ℃ of T
2Greater than 1615 ℃
Chemical ingredients Al
2O
3Greater than 77 ZrO
2Less than 4.0%
Fe
2O
3Less than 1.2%
The present invention manufactures experimently test, and the clinkering zone of 60 meters rotary kilns of Shanxi factory cement company and the life-span of excessive band were brought up to more than 8 months by original 3-6 month; The life-span that makes the clinkering zone of Shanxi factory 110 meters alumina clinker sintering rotary kiln and excessively be with was brought up to more than 9 months from 3-4 month.
Claims (4)
1. mullite composite brick for basic rotary kiln is characterized in that being made by material component that accounts for following weight percent content and the lignosulfite that accounts for material gross weight 4-6%:
Special grade bauxite grog aggregate 50-65%, granularity is smaller or equal to 7mm;
High grade bauxite grog fine powder 15-30%, granularity is smaller or equal to 0.088mm;
3 grades of alumina chamotte fine powder 5-10%, granularity is smaller or equal to 0.088mm;
α-Al
20
3Powder 4-8%, granularity is smaller or equal to 0.074mm;
ZrO
2Powder 3-4%, granularity is smaller or equal to 0.088mm;
White clay powder 3-6%, granularity is smaller or equal to 0.088mm.
2. mullite composite brick for basic rotary kiln according to claim 1 is characterized in that:
Described special grade bauxite grog aggregate 60%, size-grade distribution is smaller or equal to 0.5mm 15%; 0.5-1mm 12%; 1-2mm 8%; 2-3mm 3%; 3-5mm 7%; 5-7mm 15%;
High grade bauxite grog fine powder 19%, granularity is smaller or equal to 0.088mm;
3 grades of alumina chamotte fine powder 8%, granularity is smaller or equal to 0.088mm;
α-Al
2O
3Powder 5%, granularity is smaller or equal to 0.074mm;
ZrO
2Powder 3.5%, granularity is smaller or equal to 0.088mm;
White clay powder 4.5%, granularity is smaller or equal to 0.088mm;
Lignosulfite accounts for 4% of above-mentioned material gross weight, and density is 1.23g/cm
3
3. mullite composite brick for basic rotary kiln according to claim 1 is characterized in that:
Described special grade bauxite grog aggregate 57%, size-grade distribution is 0.1-1mm 15%; 1-2mm 11%; 2-3mm 5%; 3-5mm 11%; 5-7mm 15%;
High grade bauxite grog fine powder 23%, granularity is smaller or equal to 0.088mm;
3 grades of alumina chamotte fine powder 8%, granularity is smaller or equal to 0.088mm;
α-Al
2O
3Powder 4%, granularity is smaller or equal to 0.074mm;
ZrO
2Powder 3.1%, granularity is smaller or equal to 0.088mm;
White clay powder 4.9%, granularity is smaller or equal to 0.088mm;
Lignosulfite accounts for 5.2% of above-mentioned material gross weight, and density is 1.23g/cm
3
4. mullite composite brick for basic rotary kiln according to claim 1 is characterized in that: described special grade bauxite grog aggregate 53.5%, and size-grade distribution is 0.1-1mm 8%; 1-2mm 12%; 2-3mm 6.5%; 3-5mm 11%; 5-7mm 16%;
High grade bauxite grog fine powder 21.4%, granularity is smaller or equal to 0.088mm;
3 grades of alumina chamotte fine powder 10%, granularity is smaller or equal to 0.088mm;
α-Al
2O
3Powder 5.6%, granularity is smaller or equal to 0.074mm;
ZrO
2Powder 4%, granularity is smaller or equal to 0.088mm;
White clay powder 5.5%, granularity is smaller or equal to 0.088mm;
Lignosulfite accounts for 5.5% of above-mentioned material gross weight, and density is 1.23g/cm
3
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510069172 CN1275907C (en) | 2005-05-12 | 2005-05-12 | Mullite composite brick for basic rotary kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510069172 CN1275907C (en) | 2005-05-12 | 2005-05-12 | Mullite composite brick for basic rotary kiln |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1693288A CN1693288A (en) | 2005-11-09 |
| CN1275907C true CN1275907C (en) | 2006-09-20 |
Family
ID=35352433
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510069172 Expired - Fee Related CN1275907C (en) | 2005-05-12 | 2005-05-12 | Mullite composite brick for basic rotary kiln |
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| CN (1) | CN1275907C (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102249655B (en) * | 2011-06-13 | 2012-10-10 | 郑州市瑞沃耐火材料有限公司 | Ductile mullite brick for pipelines of hot blast stoves and manufacturing method thereof |
| CN102557688B (en) * | 2012-01-06 | 2013-08-14 | 淄博工陶耐火材料有限公司 | Preparation method for isostatic pressure calcium-aluminum-silicon tin bath bottom brick |
| CN104744059B (en) * | 2015-03-20 | 2016-09-28 | 湖南湘钢瑞泰科技有限公司 | A kind of dry coke quenching mullite brick and preparation method thereof |
| CN106242598B (en) * | 2016-08-05 | 2019-05-17 | 重庆钢铁集团矿业有限公司冶金材料厂 | Inner liner of rotary kiln brick, liner composite brick and its manufacturing method |
| CN108218409A (en) * | 2017-12-15 | 2018-06-29 | 江苏诺明高温材料股份有限公司 | A kind of hazardous waste rotary kiln polymolecularity Al2O3-Al2O3·ZrO2The preparation method of composite material |
| CN108409299A (en) * | 2018-04-20 | 2018-08-17 | 万玉梅 | A kind of preparation method of modification bamboo charcoal fiber anti-strip brick |
| CN108516849B (en) * | 2018-06-06 | 2021-02-02 | 武汉科技大学 | Zirconium mullite brick for cement kiln and preparation method thereof |
| CN113896517B (en) * | 2021-10-26 | 2022-11-25 | 中国地质大学（北京） | Method for preparing mullite-corundum complex-phase ceramic by using bauxite clinker waste |
| CN114853486A (en) * | 2022-04-22 | 2022-08-05 | 江苏盛耐新材料有限公司 | Preparation method of thermal shock resistance composite nozzle brick |
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2005
- 2005-05-12 CN CN 200510069172 patent/CN1275907C/en not_active Expired - Fee Related
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|---|---|
| CN1693288A (en) | 2005-11-09 |
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Granted publication date: 20060920 Termination date: 20120512 |