CN1204082C - Artificial mullite synthesizing process - Google Patents
Artificial mullite synthesizing process Download PDFInfo
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- CN1204082C CN1204082C CN 01107134 CN01107134A CN1204082C CN 1204082 C CN1204082 C CN 1204082C CN 01107134 CN01107134 CN 01107134 CN 01107134 A CN01107134 A CN 01107134A CN 1204082 C CN1204082 C CN 1204082C
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- raw material
- mullite
- kaolin
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Abstract
The present invention relates to a method for artificially synthesizing mullite. The present invention is characterized in that one or multiple substances of high bauxite, kaolin, clay, celite and aluminum oxide are used as raw material; the raw material is sorted, matched, pulverized, molded, baked, calcined, cooled and artificially synthesized into the mullite by a furnace burning method. The production cost of the present invention is 10% to 40% of the production cost of an electric furnace electric melting method, and various indexes of products approach to and achieve the indexes of the mullite generated by means of the electric furnace electric melting method. The present invention provides a condition for the extensive use of the mullite, particularly for comprehensive improvement of the furnace body quality of a high temperature smelting furnace. The present invention has the characteristics of wide raw material selection range and low production cost.
Description
Technical field
The present invention relates to a kind of feedstock production process of refractory materials, particularly a kind of production method of synthetic mullite.
Background technology
Mullite is a kind of raw material of producing high-grade refractory materials, and it has the characteristics of high temperature resistant, anti-erosion, anti-rapid heat cycle.The mullite of synthetic mainly is to adopt electric furnace electric smelting method at present.Though electric furnace electric smelting method can be produced mullite, its production cost is too high, so the mullite of synthetic can not get widespread usage always.
Summary of the invention
The objective of the invention is to: a kind of method of new synthetic mullite is provided, and it is to be raw material with one or more materials in alumine, kaolin, clay, silica, the aluminum oxide, produces mullite in the mode that kiln burns till.Its production cost is significantly less than electric furnace electric smelting method.
The present invention is achieved in that by following step and produces mullite:
1. raw material: with alumine or/and kaolin is raw material; Wherein, alumine is Al
2O
3Content is not less than 43% alumine, and kaolin is Al
2O
3Content is not less than 32% kaolin;
2. coupling: with raw material mate, mixing, homogenizing obtain the A material;
3. pulverize: the A material is ground into the order number is not less than the Powdered material of 170 purposes, get the B material;
4. moulding: the B material is made the blank of volume density more than or equal to 2.15 gram/cubic centimetres, get the C material;
5. oven dry: the C material is sent into drying unit dry, the residual water-content of oven dry back blank is not more than 1%, gets the D material;
6. burn till: the D material is sent into kiln fire, firing temperature is at 1450 ℃～1800 ℃, and firing time 3～120 hours gets the E material;
7. cooling: treat that kiln temperature reduces to below 600 ℃, E expected kiln discharge, finished product.
In the method for above-mentioned synthetic mullite, the raw material of described step in 1., preferably Al
2O
3Content is not less than 77% alumine, Al
2O
3Content is not less than 40% kaolin.
Compared with the prior art, the method synthetic mullite that the present invention adopts kiln to burn till, its material choice wide ranges, production cost is low, its production cost is 10%～40% of an electric furnace electric smelting method, every index of product near and reach the index of the mullite that electric furnace electric smelting method produces.Be the widespread use of mullite, the body of heater quality that particularly comprehensively improves the pyrotic smelting stove provides condition.Has the material choice wide ranges, the characteristics that production cost is low.
Embodiment
Embodiment 1: with Al
2O
3The kaolin of content 40% is raw material, produces Al
2O
3Content is not less than 45% mullite.Production stage is as follows:
1. get Al
2O
3The kaolin of content 40% is raw material, gets the A material;
2. the A material is ground into and is not less than the Powdered material of 170 purposes, get the B material;
3. the B material is sent into stirrer, add the aqueous solution that constitutes by wedding agent (as the xylogen calcium sulfonate) in right amount, make the adobe material that volume density is not less than 2.15 gram/cubic centimetres after stirring, get the C material;
4. C material is sent into dryer and dries, dry to the residual water-content of blank and be not more than 1%, the D material;
5. C material being sent into down-draft kiln and burn till, is example with the adobe, and the wide * height of long * is 150*100*50mm～300*200*100mm, and firing temperature is at 1500 ℃～1550 ℃, firing time 72～120 hours.Blank is big, and firing temperature is low, and then firing time is long.Get the E material after burning till;
6. kiln is closed the fire cooling, when being cooled to below 200 ℃, E is expected kiln discharge, get finished product.
Embodiment 2: with Al
2O
3Content is not less than 77% alumine, Al
2O
3It is raw material that content is not less than 32% clay, produces Al
2O
3Content is not less than 75% mullite.Production stage is as follows:
1. get and account for total amount 72%, Al
2O
3Content is not less than 77% alumine; Get and account for total amount 28%, Al
2O
3It is raw material that content is not less than 32% clay, with raw material mate, mixing, homogenizing get the A material;
2. the A material is ground into and is not less than the Powdered material of 170 purposes, get the B material;
3. look the degree of drying of B material, add the aqueous solution that constitutes by wedding agent (as the xylogen calcium sulfonate) in right amount, send into and make spherical ingot or the mud bar shaped blank that volume density is not less than ￠ 30～￠ 80mm of 2.15 gram/cubic centimetres after stirrer stirs, get the C material;
4. C material is sent into dryer and dries, dry to the residual water-content of blank and be not more than 1%, the D material;
5. C material is sent into rotary kiln and fire, firing temperature is at 1700 ℃～1750 ℃, firing time 3～5 hours.Get the E material after burning till;
6. E is expected into cooling cylinder that when being cooled to below 600 ℃, kiln discharge gets finished product.
Embodiment 3: with Al
2O
3The alumine of content 52% is a raw material, produces Al
2O
3Content is not less than 60% mullite.Production stage is as follows:
1. get Al
2O
3The alumine of content 52% is a raw material, gets the A material;
2. the A material is ground into and is not less than the Powdered material of 170 purposes, get the B material;
3. look the degree of drying of B material, add the aqueous solution that constitutes by wedding agent (as the xylogen calcium sulfonate) in right amount, send into and make spherical ingot or the mud bar shaped blank that volume density is not less than ￠ 30～￠ 80mm of 2.15 gram/cubic centimetres after stirrer stirs, get the C material;
4. C material is sent into dryer and dries, dry to the residual water-content of blank and be not more than 1%, the D material;
5. C material is sent into shaft furnace and burn till, firing temperature is at 1550 ℃～1650 ℃, firing time 48～72 hours.Blank is big, and firing temperature is low, and then firing time is long.Get the E material after burning till;
When 6. the E material naturally cooled to below 600 ℃ in shaft furnace, kiln discharge got finished product.
Above-mentioned firing time is to be fuel with the coal, and as being fuel with heavy oil, combustion gas, the time that reaches firing temperature will shorten, and therefore total firing time can shorten.
When the present invention prepares burden, also can alumine or aluminum oxide be base-material, be made into raw material with in kaolin, clay, the silica two kinds or three kinds for auxiliary material.
Claims (2)
1, a kind of method of synthetic mullite is characterized in that: press following step production:
1. raw material: with alumine or/and kaolin is raw material; Wherein, alumine is Al
2O
3Content is not less than 43% alumine, and kaolin is Al
2O
3Content is not less than 32% kaolin;
2. coupling: with raw material mate, mixing, homogenizing obtain the A material;
3. pulverize: the A material is ground into the order number is not less than the Powdered material of 170 purposes, get the B material;
4. moulding: the B material is made the blank of volume density more than or equal to 2.15 gram/cubic centimetres, get the C material;
5. oven dry: the C material is sent into drying unit dry, the residual water-content of oven dry back blank is not more than 1%, gets the D material;
6. burn till: the D material is sent into kiln fire, firing temperature is at 1450 ℃～1800 ℃, and firing time 3～120 hours gets the E material;
7. cooling: treat that kiln temperature reduces to below 600 ℃, E expected kiln discharge, finished product.
2, the method for synthetic mullite according to claim 1 is characterized in that: the raw material of described step in 1. is Al
2O
3Content is not less than 77% alumine, Al
2O
3Content is not less than 40% kaolin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01107134 CN1204082C (en) | 2001-02-16 | 2001-02-16 | Artificial mullite synthesizing process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01107134 CN1204082C (en) | 2001-02-16 | 2001-02-16 | Artificial mullite synthesizing process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1312237A CN1312237A (en) | 2001-09-12 |
| CN1204082C true CN1204082C (en) | 2005-06-01 |
Family
ID=4656085
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01107134 Expired - Fee Related CN1204082C (en) | 2001-02-16 | 2001-02-16 | Artificial mullite synthesizing process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1204082C (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1304289C (en) * | 2004-08-13 | 2007-03-14 | 桂林工学院 | Method for preparing mullite multiple phase nanocrystalline using natural kaolin |
| CN100336772C (en) * | 2006-03-13 | 2007-09-12 | 北京科技大学 | Cristobalite-mullite composite material and preparing method |
| CN100360464C (en) * | 2006-07-22 | 2008-01-09 | 马全才 | Industrial manufacture method of single crystal phase mullite |
| CN100358840C (en) * | 2006-10-09 | 2008-01-02 | 杨秀琴 | Composite mullite brick for special alkaline rotary kiln |
| CN100398486C (en) * | 2006-12-15 | 2008-07-02 | 郑州真金耐火材料有限责任公司 | Composite wearing-resistant silica brick |
| CN101314547B (en) * | 2007-06-01 | 2011-08-03 | 李正坤 | Processing technique for high-purity mullite |
| CN100590099C (en) * | 2007-12-05 | 2010-02-17 | 山西阳泉华岭耐火材料有限公司 | Refractory materials for carbon baking furnace and preparing method thereof |
| CN101412615B (en) * | 2008-11-13 | 2011-04-06 | 刘光文 | Dentiform porcelain column and preparation |
| CN102092734A (en) * | 2010-11-29 | 2011-06-15 | 中煤平朔煤业有限责任公司 | Method for preparing sodium silicate solution and mullite refractory material with fly ash |
| CN103496708B (en) * | 2013-09-24 | 2015-03-04 | 武汉科技大学 | Raw material for synthesizing mullite and preparation method thereof |
| CN105130388B (en) * | 2015-08-24 | 2017-05-03 | 天津城建大学 | Preparation method for mullite whisker reinforced ceramic material |
| CN113264779A (en) * | 2021-05-26 | 2021-08-17 | 贵州华鑫新材料有限公司 | Production process of electrofused mullite |
| CN114524667A (en) * | 2021-12-30 | 2022-05-24 | 江苏新时高温材料股份有限公司 | High-stability low-cost preparation process for artificially synthesized mullite |
-
2001
- 2001-02-16 CN CN 01107134 patent/CN1204082C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1312237A (en) | 2001-09-12 |
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Granted publication date: 20050601 Termination date: 20160216 |