CN100336772C - Cristobalite-mullite composite material and preparing method - Google Patents
Cristobalite-mullite composite material and preparing method Download PDFInfo
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- CN100336772C CN100336772C CNB2006100571624A CN200610057162A CN100336772C CN 100336772 C CN100336772 C CN 100336772C CN B2006100571624 A CNB2006100571624 A CN B2006100571624A CN 200610057162 A CN200610057162 A CN 200610057162A CN 100336772 C CN100336772 C CN 100336772C
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- cristobalite
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- mullite
- coal gangue
- mullite composite
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Abstract
The present invention relates to a cristobalite-mullite composite material and a preparation method. The cristobalite-mullite composite material belongs to the field of refractory materials. The present invention particularly relates to the cristobalite-mullite composite material, and is characterized in that coal gangue and bauxite are taken as principal raw materials to synthesize cristobalite-mullite, the weight percentage content of the coal gangue is from 50% to 75%, the weight percentage content of the bauxite is from 25 to 50%, and the required Al2O3 content in the bauxite is more than 75%. The present invention comprises the synthetic procedures of the cristobalite-mullite that anhydrous alcohol is used as the medium, the raw materials preserve heat for 12 hours in an oven after processed through ball milling for 6 hours and are formed by mechanically pressing after taken out, and the raw materials preserve heat within 3 to 6 hours at 1350 DEG C to 1450 DEG C and are synthesized under air atmosphere. Because the coal gangue and the bauxite are taken as the principal raw materials to synthesize the cristobalite-mullite, the full utilization of the existing resources in China is combined, and the regeneration utilization changing solid waste into resources is promoted. The present invention has the advantages of abundant raw material, low cost and simple synthetic technology. The present invention is favorable to large-scale industrial production, and is a new path for preparing high temperature refractory materials.
Description
Technical field
The invention belongs to fire resisting material field, particularly a kind of cristobalite-mullite composite material.
Background technology
China's bauxitic clay reserves are very abundant, and the place of production is from the Shanxi to the north of the Yellow River, Hebei and Shandong, pass the Henan and the Guangxi at middle part, Guizhou and Yunnan up to southwest, the main place of production that produces the bauxitic clay grog at present in Shanxi, Henan and Guizhou.Bauxitic clay is formed by mineral weathering such as feldspar, mica, and his essential mineral type is gibbsite, diasporite and boehmite, in addition because the condition difference that forms also may contain impurity such as kaolinite, quartz, calcite.Diaspore in China's bauxitic clay-kaolinite type (DK) and boehmite-kaolinite type (BK) is most widely used, and DK type bauxitic clay grog is pressed Al
2O
3Content atmosphere top grade, I etc., IIA etc., IIB etc., III etc., its main chemical compositions sees Table 1 and table 2
All kinds of BK type of table 1 alumine calcining back chemical ingredients (wt%)
| Al 2O 3 | SiO 2 | Fe 2O 3 | TiO 2 | Na 2O | K 2O | I.L | |
| Guizhou | 59.80 | 23.52 | 0.51 | 1.08 | 0.07 | 0.02 | 14.66 |
| Henan | 62.44 | 20.68 | 0.64 | 1.82 | 0.03 | 0.11 | 14.12 |
All kinds of DK type of table 2 alumine calcining back chemical ingredients (wt%)
| Rank | Al 2O 3 | SiO 2 | Fe 2O 3 | TiO 2 | CaO | MgO | K 2O | Na 2O |
| S | 86.20 | 7.60 | 1.76 | 4.02 | - | 0.25 | 0.14 | 0.06 |
| I | 82.40 | 11.55 | 1.52 | 3.64 | - | 0.28 | 0.13 | 0.06 |
| I | 79.80 | 14.50 | 1.64 | 3.17 | - | 0.30 | 0.10 | 0.05 |
| IIA | 76.03 | 19.40 | 1.46 | 2.87 | - | 0.15 | 0.10 | 0.10 |
| IIA | 72.20 | 22.00 | 1.78 | 2.64 | - | 0.18 | 0.15 | 0.05 |
| IIA | 69.80 | 25.70 | 1.71 | 2.44 | - | 0.17 | 0.12 | 0.06 |
| IIB | 67.50 | 27.40 | 1.54 | 2.82 | - | 0.11 | 0.16 | 0.20 |
| IIB | 60.50 | 33.70 | 1.92 | 2.94 | - | 0.18 | 0.16 | 0.10 |
| III | 54.10 | 40.50 | 1.72 | 3.00 | - | 0.17 | 0.14 | 0.05 |
Coal gangue is the byproduct that produces in coal mining and washing process, is one of industrial residue of China's quantity discharged maximum.Coal gangue output is pressed 15% of raw coal output and is calculated, annual coal gangue increases more than 1～200,000,000 ton at least, about 2,000,000,000 tons of the coal gangue of storing up over the years, take up an area of nearly 100,000 mu, and, just risen to 3.1 hundred million tons, and not only taken a large amount of farmlands and soil in 2000 still in continuous increase, and serious environment pollution, how to administer and fully utilize the attention that coal gangue is also obtaining people.
Domestic coal gangue utilize overview: 1. coal gangue power generation 2. making coal gangue brick 3. coal gangue produce cement 4. do the infant industry filler 5. coal gangue prepare sorbent material and 6. utilize coal gangue exploitation ceramic product 7. to utilize coal gangue to do the filling or the face underfill material in surface collapse district, but the destructive soil of mining is restored, and the minimizing soil damages and 8. utilizes coal gangue is that carrier is produced inorganic composite fertilizer and microorganism organic fertilizer.
Shanxi is the big province of producing coal, so also there is a large amount of coal gangues to pile up simultaneously, its main chemical compositions is SiO
2Content about 50%, Al
2O
3Content also contains a spot of CaO, MgO, TiO simultaneously about 20%
2, Na
2O, K
2The C of O and different content, its exploitation prospect is very optimistic.
Summary of the invention:
The object of the invention purpose is making full use of and promote the solid waste resource recovery regeneration in conjunction with China's existing resource, selected a kind of natural matter and solid waste to come synthetic fire resistive material to make cristobalite-mullite composite material, not only made full use of existing resource, simultaneously also reduced the pollution that solid waste is brought, reduced production costs greatly.
A kind of cristobalite-mullite composite material, the main raw material that it is characterized in that synthetic cristobalite-mullite composite material is coal gangue and bauxitic clay, the weight percent content of coal gangue is 50～75%, and the weight percent content of bauxitic clay is 25～50%, Al in the bauxitic clay
2O
3Content requirement is greater than 75%.Optimum material proportion: the weight percent content of coal gangue is 55～70%, and the weight percent content of bauxitic clay is 30～45%.
Its making method is: raw material is done medium with dehydrated alcohol, is incubated 12 hours through ball milling after 6 hours in baking oven, takes out the back mechanical pressing, 1350 ℃～1450 ℃ insulations 3～6 hours, synthesizes under the air atmosphere.Through test, and the composition of matrix material that utilized XRD analysis, test-results shows: the synthetic cristobalite-mullite composite material is very pure.Because the main raw material of synthetic cristobalite-mullite is coal gangue and bauxitic clay, not only combine making full use of of China's existing resource.And promoted the solid waste resource recovery regeneration.Abundant raw material of the present invention, cheap, synthesis technique is very simple, helps large industrialized production, be the preparation high-temperature refractory another new way.
Description of drawings:
Fig. 1: cristobalite-mullite composite material synthesis technique figure
Fig. 2: cristobalite-mullite composite material XRD figure (60wt% coal gangue)
Fig. 3: cristobalite-mullite composite material XRD figure (70wt% coal gangue)
Fig. 4: cristobalite-mullite composite material SEM schemes (60wt% coal gangue)
Fig. 5: cristobalite-mullite composite material SEM schemes (70wt% coal gangue)
Embodiment:
1. raw material is chosen
1. the chemical analysis results of bauxitic clay
2. the chemical analysis results of coal gangue
2. raw material is synthetic
Proportioning raw materials is: 60,70wt.% coal gangue and 40,30wt.% bauxitic clay
3. synthesis step: see Fig. 1
Claims (3)
1, a kind of cristobalite-mullite composite material, the main raw material that it is characterized in that synthetic cristobalite-mullite composite material is coal gangue and bauxitic clay, the weight percent content of coal gangue is 50～75%, and the weight percent content of bauxitic clay is 25～50%, Al in the bauxitic clay
2O
3Content is greater than 75%.
2, a kind of cristobalite-mullite composite material as claimed in claim 1, the proportioning raw materials that it is characterized in that synthetic cristobalite-mullite composite material: the weight percent content of coal gangue is 55～70%, and the weight percent content of bauxitic clay is 30～45%.
3, a kind of cristobalite-mullite composite material as claimed in claim 1 or 2, the step that it is characterized in that synthetic cristobalite-mullite composite material is: raw material is done medium with dehydrated alcohol, in baking oven, be incubated 12 hours through ball milling after 6 hours, take out the back mechanical pressing, 1350 ℃～1450 ℃ insulations 3～6 hours, synthesize under the air atmosphere.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100571624A CN100336772C (en) | 2006-03-13 | 2006-03-13 | Cristobalite-mullite composite material and preparing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100571624A CN100336772C (en) | 2006-03-13 | 2006-03-13 | Cristobalite-mullite composite material and preparing method |
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| CN1821166A CN1821166A (en) | 2006-08-23 |
| CN100336772C true CN100336772C (en) | 2007-09-12 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101265118B (en) * | 2008-04-26 | 2010-04-07 | 孝义市京山耐火材料有限公司 | Micro-pore mullite lightweight aggregate and preparation method thereof |
| CN102229501A (en) * | 2011-04-21 | 2011-11-02 | 河南省冶金研究所有限责任公司 | Method for preparing cristobalite-mullite composite refractory |
| CN106518034B (en) * | 2016-11-08 | 2019-04-05 | 太原科技大学 | Carried magnetic metal simple-substance mullite ceramic composite wave-suction material preparation method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1312237A (en) * | 2001-02-16 | 2001-09-12 | 张世平 | Artificial mullite synthesizing process |
| CN1559985A (en) * | 2004-02-24 | 2005-01-05 | 北京科技大学 | Light fire resisting brick of iolite-mulbite and preparation process thereby |
-
2006
- 2006-03-13 CN CNB2006100571624A patent/CN100336772C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1312237A (en) * | 2001-02-16 | 2001-09-12 | 张世平 | Artificial mullite synthesizing process |
| CN1559985A (en) * | 2004-02-24 | 2005-01-05 | 北京科技大学 | Light fire resisting brick of iolite-mulbite and preparation process thereby |
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| CN1821166A (en) | 2006-08-23 |
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Owner name: ZHONGYUAN WEIYE NEW MATERIAL CO., LTD. Free format text: FORMER OWNER: UNIVERSITY OF SCIENCE + TECHNOLOGY BEIJING Effective date: 20120803 |
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Free format text: CORRECT: ADDRESS; FROM: 100083 HAIDIAN, BEIJING TO: 036000 SHUOZHOU, SHAANXI PROVINCE |
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Effective date of registration: 20120803 Address after: 036000 Shanxi city in Shuozhou Province, Shuocheng district town god horse jump village south of Shuozhou city solid waste comprehensive utilization of Industrial Park Patentee after: ZHONGYUAN WEIYE NEW MATERIAL CO., LTD. Address before: 100083 Haidian District, Xueyuan Road, No. 30, Patentee before: University of Science and Technology Beijing |
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Granted publication date: 20070912 Termination date: 20200313 |
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