CN108059450B - Environment-friendly cordierite-mullite kiln furniture and manufacturing method thereof - Google Patents
Environment-friendly cordierite-mullite kiln furniture and manufacturing method thereof Download PDFInfo
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Abstract
The environment-friendly cordierite-mullite kiln furniture comprises the following raw materials, by weight, 25-35 parts of waste ceramic, 12-22 parts of cordierite-mullite clinker, 30-45 parts of ball washing clay, 10-15 parts of andalusite, 8-13 parts of talcum powder, 5-15 parts of kyanite and 5-12 parts of industrial- α -alumina powder, wherein the waste ceramic, the cordierite-mullite clinker and the andalusite are used as aggregates, the ball washing clay, the talcum powder, the kyanite and the industrial- α -alumina powder are introduced as matrix materials to form a solid of the kiln furniture composite material, the utilization rate of the waste ceramic reaches 25-35%, the waste of resources is reduced, the production cost of the kiln furniture material is also reduced, and the prepared thermal shock-ceramic kiln furniture product is low in density, light in mass, high in normal-temperature rupture strength, high in apparent porosity, good in stability and good in energy-saving performance.
Description
Technical Field
The invention belongs to the field of kiln furniture materials, and particularly relates to environment-friendly cordierite-mullite kiln furniture and a preparation method thereof.
Background
The kiln furniture used for supporting the fired product in the kiln is required to have the characteristics of good thermal shock resistance and low energy consumption, the cordierite-mullite material is used as a high-grade kiln furniture material due to low expansion coefficient and strong high temperature resistance, but the cordierite-mullite kiln furniture has high production cost, more waste materials and limited development due to high cost and low firing rate of a synthetic material; in addition, the bulk density of the existing cordierite-mullite kiln furniture material is 1.75-2.15g/cm3, the product has heavy weight and much heat absorption, and the material has large production raw materials and fuel consumption when being used in a kiln.
The waste ceramics are waste materials generated in the production process of ceramics or ceramics with lost use value, the common treatment method is degradation treatment and landfill, which causes material waste and certain adverse effect on the environment, and further improvement is needed.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides environment-friendly cordierite-mullite kiln furniture and a preparation method thereof.
The invention adopts the following technical scheme:
an environment-friendly cordierite-mullite kiln furniture comprises, by weight, 25-35 parts of waste ceramic, 12-22 parts of cordierite-mullite clinker, 30-45 parts of ball washing clay, 10-15 parts of andalusite, 8-13 parts of talcum powder, 5-15 parts of kyanite and 5-12 parts of industrial- α -alumina powder.
Further, the waste ceramic comprises the following chemical compositions in percentage by weight: al (Al)2O3：20-28％、SiO2：70-75％、K2O：2-5％。
Furthermore, the granularity of the waste ceramic is 0-0.5 um.
Furthermore, the purity of the industrial- α -alumina powder is not less than 96%.
The method for manufacturing the environment-friendly cordierite-mullite kiln furniture comprises the following steps:
(1) mixing materials: weighing raw materials of cordierite-mullite kiln furniture according to the parts by weight, putting the raw materials into a mixer, stirring for 10-15min, putting the raw materials into an edge runner mill, adding water, and rolling for 20-25 min;
(2) and ageing the materials: putting the mixture obtained in the step (1) into a material box, and storing for 28-36h at the temperature of 35-40 ℃;
(3) and pressing and forming: manufacturing a kiln furniture product green body according to the shape of the kiln furniture product to be manufactured;
(4) and (3) drying: drying the prepared green body for 18-30h under the conditions that the air humidity is 50-80% and the temperature is 50-90 ℃, then drying for 42-54h under the conditions that the air humidity is 25-40% and the temperature is 105-115 ℃, and finally drying for 24-36h under the conditions that the air humidity is 15-20% and the temperature is 120-130 ℃;
(5) and firing: and (4) sending the dried green body into a kiln furnace, and firing for 8-12h at the temperature of 1300-1350 ℃ to obtain a cordierite-mullite kiln furniture product.
Further, the water added in the step (1) is 15-18% of the raw material mixture.
Further, in the step (3), the size of the kiln furniture product green body is calculated according to the loss on ignition of the mixture of 0.8-1.2%.
The cordierite-mullite kiln furniture prepared by the invention has the beneficial effects that waste ceramics, cordierite-mullite clinker and andalusite are used as aggregates, washed ball clay, talcum powder, kyanite and industrial- α -alumina powder are introduced as matrix materials to form a solid of the composite material of the kiln furniture, the utilization rate of the waste ceramics reaches 25-35%, the waste of resources is reduced, the production cost of the kiln furniture material is also reduced, and the prepared cordierite-mullite kiln furniture product has low density, light weight, high normal-temperature rupture strength, high apparent porosity, good thermal shock stability and good energy-saving performance.
Detailed Description
The invention is further described below by means of specific embodiments.
Example 1
An environment-friendly cordierite-mullite kiln furniture comprises the following raw materials, by weight, 25 parts of waste ceramic, 22 parts of cordierite-mullite clinker, 30 parts of water washing ball clay, 10 parts of andalusite, 13 parts of talcum powder, 5 parts of kyanite and 5 parts of industrial- α -alumina powder;
the waste ceramic comprises the following chemical components in percentage by weight: al (Al)2O3：20％、SiO2：75％、K2O：5％。
The granularity of the waste ceramics is 0-0.5 um;
the purity of industrial- α -alumina powder is not less than 96%;
the manufacturing method of the environment-friendly cordierite-mullite kiln furniture comprises the following steps:
(1) mixing materials: weighing raw materials of cordierite-mullite kiln furniture according to the weight parts, putting the raw materials into a mixer for stirring for 10min, putting the raw materials into an edge runner mill, adding water for rolling for 25min, wherein the added water accounts for 15% of the raw material mixture;
(2) and ageing the materials: putting the mixture obtained in the step (1) into a material box, and storing for 28h at the temperature of 40 ℃;
(3) and pressing and forming: manufacturing a kiln furniture product green body according to the shape of the kiln furniture product to be manufactured, wherein the size of the kiln furniture product green body is calculated according to the loss on ignition of 1.2% of the mixture;
(4) and (3) drying: drying the prepared green body for 18h under the condition that the air humidity is 80% and the temperature is 90 ℃, then drying for 54h under the condition that the air humidity is 25% and the temperature is 105 ℃, and finally drying for 24h under the condition that the air humidity is 20% and the temperature is 130 ℃;
(5) and firing: and (3) feeding the dried green body into a kiln, and firing at 1300 ℃ for 12h to obtain a cordierite-mullite kiln furniture product.
The prepared environment-friendly cordierite-mullite kiln furniture obtains the following performance parameters through tests:
density: 2.0g/cm3；
Coefficient of expansion: 22.14*10-7k-1；
And (3) normal temperature fracture resistance: 13.2 MPa;
apparent porosity: 62.67 percent;
high temperature flex (1250 ℃ 0.5 h): 15.4 MPa;
the cordierite-mullite kiln furniture in the prior art obtains the following performance parameters through tests:
density: 2.15g/cm3；
Coefficient of expansion: 23.14*10-7k-1；
And (3) normal temperature fracture resistance: 12.4 MPa;
apparent porosity: 58.34 percent;
high temperature flex (1250 ℃ 0.5 h): 14.6 MPa;
according to the test data, compared with the cordierite-mullite kiln furniture in the prior art, the environment-friendly cordierite-mullite kiln furniture prepared by the invention has the advantages of low product density, light weight, high normal-temperature rupture strength, high apparent porosity, good thermal shock stability and good energy-saving performance.
Example 2
An environment-friendly cordierite-mullite kiln furniture comprises the following raw materials, by weight, 35 parts of waste ceramic, 12 parts of cordierite-mullite clinker, 45 parts of ball washing clay, 15 parts of andalusite, 8 parts of talcum powder, 15 parts of kyanite and 12 parts of industrial- α -alumina powder;
the waste ceramic comprises the following chemical components in percentage by weight: al (Al)2O3：28％、SiO2：70％、K2O：2％。
The granularity of the waste ceramics is 0-0.5 um;
the purity of industrial- α -alumina powder is not less than 96%;
the manufacturing method of the environment-friendly cordierite-mullite kiln furniture comprises the following steps:
(1) mixing materials: weighing raw materials of cordierite-mullite kiln furniture according to the weight parts, putting the raw materials into a mixer, stirring for 15min, putting the raw materials into an edge runner mill, adding water, and rolling for 20min, wherein the added water accounts for 15% of the raw material mixture;
(2) and ageing the materials: putting the mixture obtained in the step (1) into a material box, and storing for 36 hours at the temperature of 35 ℃;
(3) and pressing and forming: manufacturing a kiln furniture product green body according to the shape of the kiln furniture product to be manufactured, wherein the size of the kiln furniture product green body is calculated according to the loss on ignition of 0.8% of the mixture;
(4) and (3) drying: drying the prepared green body for 30h under the conditions that the air humidity is 50% and the temperature is 50 ℃, then drying for 42h under the conditions that the air humidity is 40% and the temperature is 115 ℃, and finally drying for 36h under the conditions that the air humidity is 15% and the temperature is 120 ℃;
(5) and firing: and (3) feeding the dried green body into a kiln, and firing at 1350 ℃ for 8h to obtain a cordierite-mullite kiln furniture product.
The prepared environment-friendly cordierite-mullite kiln furniture obtains the following performance parameters through tests:
density: 1.98g/cm3；
Coefficient of expansion: 22.16*10-7k-1；
And (3) normal temperature fracture resistance: 13.7 MPa;
apparent porosity: 62.78 percent;
high temperature flex (1250 ℃ 0.5 h): 15.5 MPa;
the cordierite-mullite kiln furniture in the prior art obtains the following performance parameters through tests:
density: 2.15g/cm3；
Coefficient of expansion: 23.14*10-7k-1；
And (3) normal temperature fracture resistance: 12.4 MPa;
apparent porosity: 58.34 percent;
high temperature flex (1250 ℃ 0.5 h): 14.6 MPa;
according to the test data, compared with the cordierite-mullite kiln furniture in the prior art, the environment-friendly cordierite-mullite kiln furniture prepared by the invention has the advantages of low product density, light weight, high normal-temperature rupture strength, high apparent porosity, good thermal shock stability and good energy-saving performance.
Example 3
An environment-friendly cordierite-mullite kiln furniture comprises the following raw materials, by weight, 30 parts of waste ceramic, 17 parts of cordierite-mullite clinker, 36 parts of ball washing clay, 12 parts of andalusite, 11 parts of talcum powder, 10 parts of kyanite and 8 parts of industrial- α -alumina powder;
the waste ceramic comprises the following chemical components in percentage by weight: al (Al)2O3：23％、SiO2：73％、K2O：4％。
The granularity of the waste ceramics is 0-0.5 um;
the purity of industrial- α -alumina powder is not less than 96%;
the manufacturing method of the environment-friendly cordierite-mullite kiln furniture comprises the following steps:
(1) mixing materials: weighing raw materials of cordierite-mullite kiln furniture according to the weight parts, putting the raw materials into a mixer to be stirred for 12min, putting the raw materials into an edge runner mill, adding water to the mixture, and rolling the mixture for 22min, wherein the added water accounts for 15% of the raw material mixture;
(2) and ageing the materials: putting the mixture obtained in the step (1) into a material box, and storing for 22h at the temperature of 47 ℃;
(3) and pressing and forming: manufacturing a kiln furniture product green body according to the shape of the kiln furniture product to be manufactured, wherein the size of the kiln furniture product green body is calculated according to the loss on ignition of 1.0 percent of the mixture;
(4) and (3) drying: drying the prepared green body for 25h under the condition that the air humidity is 65% and the temperature is 75 ℃, then drying for 46h under the condition that the air humidity is 32% and the temperature is 112 ℃, and finally drying for 30h under the condition that the air humidity is 18% and the temperature is 125 ℃;
(5) and firing: and (3) feeding the dried green body into a kiln, and firing at the temperature of 1320 ℃ for 8h to obtain a cordierite-mullite kiln furniture product.
The prepared environment-friendly cordierite-mullite kiln furniture obtains the following performance parameters through tests:
density: 1.97g/cm3；
Coefficient of expansion: 22.19*10-7k-1；
And (3) normal temperature fracture resistance: 13.8 MPa;
apparent porosity: 62.88 percent;
high temperature flex (1250 ℃ 0.5 h): 15.6 MPa;
the cordierite-mullite kiln furniture in the prior art obtains the following performance parameters through tests:
density: 2.15g/cm3；
Coefficient of expansion: 23.14*10-7k-1；
And (3) normal temperature fracture resistance: 12.4 MPa;
apparent porosity: 58.34 percent;
high temperature flex (1250 ℃ 0.5 h): 14.6 MPa;
according to the test data, compared with the cordierite-mullite kiln furniture in the prior art, the environment-friendly cordierite-mullite kiln furniture prepared by the invention has the advantages of low product density, light weight, high normal-temperature rupture strength, high apparent porosity, good thermal shock stability and good energy-saving performance.
The above description is only a preferred embodiment of the present invention, and therefore should not be taken as limiting the scope of the invention, which is defined by the appended claims and their equivalents and modifications within the scope of the description.
Claims (5)
1. The environment-friendly cordierite-mullite kiln furniture is characterized by comprising the following raw materials, by weight, 25-35 parts of waste ceramic, 12-22 parts of cordierite-mullite clinker, 30-45 parts of ball washing clay, 10-15 parts of andalusite, 8-13 parts of talcum powder, 5-15 parts of kyanite and 5-12 parts of industrial- α -alumina powder;
the waste ceramic comprises the following chemical components in percentage by weight: al (Al)2O3：20-28％、SiO2：70-75％、K2O：2-5％；
The manufacturing method comprises the following steps:
(1) mixing materials: weighing raw materials of cordierite-mullite kiln furniture according to the parts by weight, putting the raw materials into a mixer, stirring for 10-15min, putting the raw materials into an edge runner mill, adding water, and rolling for 20-25 min;
(2) and ageing the materials: putting the mixture obtained in the step (1) into a material box, and storing for 28-36h at the temperature of 35-40 ℃;
(3) and pressing and forming: manufacturing a kiln furniture product green body according to the shape of the kiln furniture product to be manufactured;
(4) and (3) drying: drying the prepared green body for 18-30h under the conditions that the air humidity is 50-80% and the temperature is 50-90 ℃, then drying for 42-54h under the conditions that the air humidity is 25-40% and the temperature is 105-115 ℃, and finally drying for 24-36h under the conditions that the air humidity is 15-20% and the temperature is 120-130 ℃;
(5) and firing: and (4) sending the dried green body into a kiln furnace, and firing for 8-12h at the temperature of 1300-1350 ℃ to obtain a cordierite-mullite kiln furniture product.
2. The method for manufacturing the environment-friendly cordierite-mullite kiln furniture as claimed in claim 1, wherein: the granularity of the waste ceramic is 0-0.5 um.
3. The method for manufacturing the environment-friendly cordierite-mullite kiln furniture as claimed in claim 1, wherein the purity of the industrial- α -alumina powder is not less than 96%.
4. The method for manufacturing the environment-friendly cordierite-mullite kiln furniture as claimed in claim 1, wherein: the water amount added in the step (1) is 15-18% of the raw material mixture.
5. The method for manufacturing the environment-friendly cordierite-mullite kiln furniture as claimed in claim 1, wherein: and (3) calculating the size of the kiln furniture product green body according to the loss on ignition of 0.8-1.2% of the mixture.
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| CN109320224A (en) * | 2018-10-26 | 2019-02-12 | 淄博工陶耐火材料有限公司 | A kind of material and preparation method thereof of high-purity cordierite combination mullite |
| CN110028314B (en) * | 2019-04-08 | 2021-05-25 | 福建省德化县创捷窑具有限公司 | High-thermal-shock-stability cordierite-mullite kiln furniture and preparation method thereof |
| CN112094127B (en) * | 2020-09-25 | 2023-02-28 | 南阳开元高温新材料有限公司 | Manufacturing process of kyanite tailing series sagger |
| CN113072386A (en) * | 2021-03-24 | 2021-07-06 | 福建省德化县创捷窑具有限公司 | Environment-friendly refractory kiln furniture and preparation method thereof |
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| JP2014073928A (en) * | 2012-10-03 | 2014-04-24 | Asahi Glass Co Ltd | Sintered oxide ceramics and manufacturing method thereof |
| CN103936406A (en) * | 2013-01-22 | 2014-07-23 | 福建省德化县创捷窑具有限公司 | Iolite-mullite deck and preparation method thereof |
| CN105669244A (en) * | 2016-01-27 | 2016-06-15 | 北京创导工业陶瓷有限公司 | Cordierite-mullite kiln furniture material with high thermal shock resistance |
| CN105801098A (en) * | 2016-04-19 | 2016-07-27 | 福建省德化县创捷窑具有限公司 | Economical and environment-friendly cordierite-mullite kiln furniture composite material and manufacturing method thereof |
| CN106518146A (en) * | 2016-11-16 | 2017-03-22 | 福建省德化荣信陶瓷有限公司 | Cordierite ceramic synthesized from ceramic whiteware waste, and preparation method thereof |
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