Method for preparing high-quality calcium magnesia by superhigh-temperature calcination
An ultra-high temperature, magnesia-calcium sand technology, which is applied in the field of ultra-high-temperature calcination to prepare high-quality magnesia-calcium sand, can solve the problems of unsatisfactory waterproofing effect, reduced high-temperature performance, and decreased high-temperature performance of magnesia-calcium materials, etc., to achieve a reduction in pulverization rate , Bulk density increase, solve the effect of easy hydration
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[0009] The present invention will be further described below in conjunction with specific embodiment:
[0010] The invention discloses a method for preparing high-quality magnesite-calcium sand by ultra-high temperature calcination, wherein dolomite and magnesite with a particle size of 50-80 mm are formulated into raw materials with a CaO content of 10%-20% and an MgO content of 80%-90% by weight percentage , put it into a ball mill tank for grinding and mixing, add water to digest and make pulp at the same time, dry the slurry into powder, add calcium lignosulfonate of 2-5% of the total powder weight to the powder, mix well, and press it into a brick under a pressure of 100-150MPa followed by calcination.
[0011] The calcination process is to raise the temperature to 1100°C at a rate of 7-10°C / min, keep it warm for 3-5 hours, and then continue to raise the temperature at a rate of 7-10°C / min to the final calcination temperature of 2000°C-2200°C. After 5-7 hours, vacuumize ...
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