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A low-temperature sintering and mullite technology, applied in the field of refractory products, can solve the problems of reduced product performance, long-term heat preservation, poor performance of mullite kiln, etc., and achieve the effect of reducing firing temperature and ensuring performance.
Inactive Publication Date: 2003-10-22
宜兴天霸非金属材料有限公司
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Problems solved by technology
[0002] Mullite kiln furniture is generally combined with mullite by reaction sintering. There are three main methods. First, high-purity clay is used as the binder for high-temperature firing. The problem is that the Na + 、K + Such impurity ions are brought into the glass phase during the sintering process to form ceramic liquid phase sintering, which affects the performance of kiln furniture products. In addition, the sintering temperature of this method is close to 1600 ° C, while the kiln temperature commonly found in my country's refractory material factories is only More than 1400 degrees; second, mullite, corundum, quartz particles and fine powder are high-pressure molded and fired at high temperature. Although the incorporation of impurities is avoided, the mullite crystal of the product can develop well and have excellent performance, but it still needs The sintering can only be completed at a very high sintering temperature, and it needs to be kept at a high temperature for a long time; third, similar to the second one, the quartz fine powder is changed into active silica powder, and the sintering temperature is lowered by the activity of silic
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Example Embodiment
[0021] Example 1, machine-made low-temperature sintered mullite kiln furniture, its component formula is: (weight percentage)
[0022] Mullite particles: 5-3mm 25 copies
[0023] 3-1mm 22 copies
[0024] 1-0mm 18 copies
[0025] Mullite fine powder 180-200 mesh 22 parts
[0026] Amorphous alumina 180-200 mesh 9 parts
[0027] Superfine quartz powder <3000 mesh 4 parts plus:
[0028] 2.8 parts of pulp waste liquid
Example Embodiment
[0029] Example 2, Hand-made low-temperature sintered mullite kiln furniture, its component formula is: (weight percentage)
[0030] Mullite particles: 3.5-1mm 50 parts
[0031] 1-0mm 18 copies
[0032] 21 parts of mullite powder 180-200 mesh
[0033] Amorphous alumina 180-200 mesh 8 parts
[0034] Superfine quartz powder <3000 mesh 3 parts plus:
[0035] Pulp waste liquid 4.6 parts
[0036] The manufacturing method of the above-mentioned embodiment is as follows: according to the ratio, put the mullite powder, amorphous alumina, and ultra-fine quartz powder into the cone sand mixer for pre-blending for 20-25 minutes, and then put them in the planetary sand mixer Put mullite particles in the medium, add half of the waste paper pulp, stir for 3-4 minutes, then put in the blended powder, add the remaining waste paper pulp, and mix for 7-8 minutes to discharge, cover the trapped material with a plastic film bag After 12 hours, it will be formed and dried in a kiln at 1450...
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Abstract
The present invention relates to a kind of low-temp. sintered mullite kiln furniture, belonging to refractory material product. It is characterized by that it uses mullite granules and fine powder asmain material, its composition also contains amorphous alumina and superfine quartz powder, and the described amorphous alumina is obtained by using industrial aluminium hydroxide through the processes of suspension heating to 650 deg.C, dewatering and air quenching, and the described superfine quartz powder is obtained by using quartz sand through the process of pneumatic vibration grinding. Said invention utilizes the raise of activity of forming mullite component to reduce firing temp. and ensure the service performance of mullite kiln furniture.
Description
technical field [0001] The invention relates to a refractory material product, especially a mullite kiln furniture. technical background [0002] Mullite kiln furniture is generally combined with mullite by reaction sintering. There are three main methods. First, high-purity clay is used as the binder for high-temperature firing. The problem is that the Na + 、K + Such impurity ions are brought into the glass phase during the sintering process to form ceramic liquid phase sintering, which affects the performance of kiln furniture products. In addition, the sintering temperature of this method is close to 1600 ° C, while the kiln temperature commonly found in my country's refractory material factories is only More than 1400 degrees; second, mullite, corundum, quartz particles and fine powder are high-pressure molded and fired at high temperature. Although the incorporation of impurities is avoided, the mullite crystal of the product can develop well and have excellent performa...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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