Method for preparing lightweight microporous magnesium raw material
A microporous, magnesia technology, applied in the field of refractory materials, can solve the problems of high thermal conductivity of magnesia refractory products, and achieve the effects of low thermal conductivity, good alkali corrosion resistance, and low volume density
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Embodiment 1
[0018] A preparation process of light microporous magnesia raw materials. According to weight percentage, the raw materials are composed of: 5% light calcined magnesium powder, 95% magnesite powder, plus 4% pulp waste liquid as binder. During production, various raw materials are firstly weighed according to the ratio, mixed evenly in a ball mill to obtain mud, and finally pressed into shape by a press, dried in a drying kiln for 24 hours, and then fired in a high-temperature kiln at 1560°C. Make the product of the present invention.
[0019] The performance index of the obtained product is: the average pore diameter is 5.4um, the apparent porosity is 26.5%, and the bulk density is 2.65g / cm 3 .
Embodiment 2
[0021] The production process is the same as that of Example 1, except that the raw materials are composed of 40% calcined magnesium powder, 60% magnesite powder, and 5% pulp waste liquid as a binder in terms of weight percentage. The performance indicators of the obtained product are: the average pore diameter is 6.9um, the apparent porosity is 21.5%, and the bulk density is 2.88g / cm 3 .
Embodiment 3
[0023] The production process is the same as that of Example 1, except that the raw materials are composed of 95% calcined magnesium powder, 5% magnesite powder, and 6% pulp waste liquid as a binder in terms of weight percentage. The performance index of the obtained product is: the average pore diameter is 8.2um, the apparent porosity is 16.5%, and the bulk density is 2.97g / cm 3 .
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