99%-above alumina granulating powder and preparation method thereof
A technology of granulating powder and alumina, which is applied in the field of alumina ceramics, can solve the problems of low green density and poor post-processing performance, and achieve the effects of low cost, good application prospects, and low water content
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Embodiment 1
[0020] The ball mill adopts an octagonal ball mill. Put 150Kg of high-alumina alumina balls above 99% in the barrel (specifications Φ6, Φ8, Φ12 (mm) according to the mass ratio 3:3:4), and put in 100KgCT-3000SG, 50Kg deionized water, 200g oxidation Yttrium, 400g magnesia, 600gD-134 are ball milled for 46h, 2kgP-222 is added for 1.5h, 600gS-920 is ballmilled for 0.5h, and then the slurry is discharged. After the slurry is discharged, it is filtered with a 80-mesh screen, and the slurry enters the mixing tank for stirring over the magnet.
[0021] Start the centrifugal spray granulator, set the inlet temperature to 220°C, the outlet temperature to 95°C, the rotation speed to 15000rpm, and the negative pressure to 120pa.
[0022] The granulated powder is sieved with 60 mesh and 325 mesh to remove coarse and fine particles. The powder must be iron-removed to remove impurities, and the powder is homogenized for 24 hours to make a billet by dry pressing metal mold forming method.
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Embodiment 2
[0026] The ball mill adopts an octagonal ball mill. Put 100Kg of high-alumina alumina balls above 99% in the barrel (specifications Φ6, Φ8, Φ12 (mm) according to the mass ratio 3:3:4), and put in 50KgCT-3000SG, 80Kg deionized water, 400g oxidation Yttrium, 800g magnesia, 200gD-134 are ball milled for 40h, 3kgP-222 is added for 1h, 500gS-920 is ballmilled for 0.6h, and then the slurry is discharged. After the slurry is discharged, it is filtered with an 80-mesh screen, and the slurry enters the mixing tank for stirring. magnet.
[0027] Start the centrifugal spray granulator, set the inlet temperature to 220°C, the outlet temperature to 95°C, the rotation speed to 15000rpm, and the negative pressure to 120pa.
[0028] The granulated powder is sieved with 60 mesh and 325 mesh to remove coarse and fine particles. The powder must be iron-removed to remove impurities, and the powder is homogenized for 28 hours to make a billet by dry pressing metal mold forming method.
[0029] Th...
Embodiment 3
[0033] The ball mill adopts an octagonal ball mill. Put 150Kg of high-alumina alumina balls (specifications Φ6, Φ8, Φ12 (mm) according to the mass ratio of 3:3:4) in the barrel, and put 150KgCT-3000SG, 150Kg deionized water, 100g oxidation Yttrium, 200g magnesia, 600gD-134 are ball milled for 50h, 1kgP-222 is added for 3h, 600gS-920 is ballmilled for 1h, and then the slurry is discharged. After the slurry is discharged, it is filtered with an 80-mesh screen. The slurry enters the mixing tank and is stirred through the magnet. .
[0034] Start the centrifugal spray granulator, set the inlet temperature to 220°C, the outlet temperature to 95°C, the rotation speed to 15000rpm, and the negative pressure to 120pa.
[0035] The granulated powder is sieved with 60 mesh and 325 mesh to remove coarse and fine particles. The powder must be iron-removed to remove impurities, and the powder is homogenized for 36 hours to make a billet by dry pressing metal mold forming method.
[0036] T...
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