High-phosphorus alumina-chrome brick for waste melting furnace and preparation method thereof
A high-phosphorus aluminum-chromium brick and melting furnace technology, applied in the field of refractory materials, can solve the problems of high cost and complicated process, and achieve the effects of improving the anti-penetration ability and avoiding a large amount of phosphorus volatilization.
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Embodiment 1
[0034] The ratio of each component is (mass percentage): white corundum particles 45%, tabular corundum particles 10%, aluminum chromium slag particles 10%, aluminum chromium slag fine powder 15%, white corundum fine powder 9%, chromium oxide green fine powder 2%, calcined alumina micropowder 7%, quartz powder 2%.
[0035] First add 2.5% solid aluminum phosphate to the granular part, then add 3% liquid phosphoric acid, without adding water, and mix evenly with a wheel mill. Then add the mixed fine powder and micro powder into the wheel mill, stir for 5 to 10 minutes, and discharge the material. The friction brick press is shaped, dried at 110°C, and fired at 1600°C for 8 hours. The product has a body density of 3.25g / cm 3 , with a porosity of 15.8%, measured as P 2 o 5 The calculated phosphorus residue amounted to 2.65%.
Embodiment 2
[0037]The proportion of each component is (mass percentage): 30% of tabular corundum particles, 33% of aluminum chromium slag particles, 10% of aluminum chromium slag fine powder, 15% of white corundum fine powder, 4% of chromium oxide green fine powder, calcined alumina Micro powder 5%, andalusite powder 3%.
[0038] First add 3% solid phosphoric acid to the granular material, then add 2% liquid aluminum dihydrogen phosphate, without adding water, and mix evenly with a wheel mill. Put the mixed fine powder and micro powder into the wheel mill, stir for 5~10 minutes and then discharge, use hydraulic molding, dry at 110°C, heat at 1550°C for 8 hours and burn, the product body density is 3.38g / cm 3 , with a porosity of 14.1%, measured as P 2 o 5 The calculated phosphorus residue amounted to 2.42%.
Embodiment 3
[0040] The proportion of each component is (mass percentage): fused chromium oxide particles 17%, white corundum particles 48%, fused chromium oxide fine powder 8%, white corundum fine powder 11%, chromium oxide green fine powder 5%, calcined oxidation Aluminum powder 6%, clay powder 5%.
[0041] First add 5% solid aluminum phosphate to the particle part, then add 2% liquid aluminum dihydrogen phosphate, without adding water, and mix evenly with a wheel mill. Then add the mixed fine powder and micro powder into the wheel mill, stir for 5-10 minutes and discharge, use vibration and pressure molding, dry at 110°C, heat at 1550°C for 8 hours and burn, the product body density is 3.60g / cm 3 , with a porosity of 12.5%, measured as P 2 o 5 The calculated phosphorus residue reached 3.81%.
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