A kind of preparation method of aluminum oxide granulation powder special for hot-pressed water valve sheet
A technology of alumina powder and alumina, which is applied in the field of preparation of alumina granulation powder for hot-pressed water valves, can solve the problems of inconsistent wax content in semi-finished products, uneven dry grinding of powder fineness, and low efficiency of ball milling. Achieve the effects of solving precipitation and uneven mixing, particle shape correction, and wide firing temperature
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Embodiment 1
[0044] (1) Raw materials and parts by weight
[0045] Main ingredients: 91.5 parts of alumina powder, 3.6 parts of calcined kaolin;
[0046] Composite sintering aid: 1.5 parts of magnesium oxide, 1.2 parts of calcium carbonate, 1 part of silicon micropowder, 1.2% of titanium dioxide;
[0047](2) Put the alumina powder, calcined kaolin and composite sintering aid into the batch ball mill for controlled crystal ball milling (using alumina balls as the grinding medium, material: ball: water = 1: 2.6: 1) The gradation size ratio of the alumina ball stone is: φ20 accounts for 20%, φ25 accounts for 25%, φ30 accounts for 5%, φ35 accounts for 5%, φ40 accounts for 25%, φ45 accounts for 20%), after ball milling to the specified time, Detect the slurry moisture, fineness and fineness gradation. The overall size is 3000*4500mm, the rotation speed is 13r / min, the ball milling time is 15 hours, the slurry fineness D90<10μm, and the slurry moisture is controlled at about 33%.
[0048] (3) ...
Embodiment 2
[0053] (1) Raw materials and parts by weight
[0054] Main ingredients: 90 parts of alumina powder, 3.6 parts of calcined kaolin;
[0055] Composite sintering aid: 2 parts of magnesium oxide, 2.2 parts of calcium carbonate, 1 part of silicon micropowder, 1.2% of titanium dioxide;
[0056] (2) Put the alumina powder, calcined kaolin and composite sintering aid into the batch ball mill for controlled crystal ball milling (using alumina balls as the grinding medium, material: ball: water = 1: 2.6: 1) The gradation size ratio of the alumina ball stone is: φ20 accounts for 20%, φ25 accounts for 25%, φ30 accounts for 5%, φ35 accounts for 5%, φ40 accounts for 25%, φ45 accounts for 20%), after ball milling to the specified time, Detect the slurry moisture, fineness and fineness gradation. The overall size is 3000*4500mm, the rotation speed is 13r / min, the ball milling time is 25 hours, the slurry fineness D90<8μm, and the slurry moisture is controlled at about 33.5%.
[0057] (3) Ad...
Embodiment 3
[0062] (1) Raw materials and parts by weight
[0063] Main ingredients: 89 parts of alumina powder, 6 parts of calcined kaolin;
[0064] Composite sintering aids: 1.3 parts of magnesium oxide, 1.3 parts of calcium carbonate, 1.2 parts of silicon micropowder, 1.2% of titanium dioxide;
[0065] (2) Put the alumina powder, calcined kaolin and composite sintering aid into the batch ball mill for controlled crystal ball milling (using alumina ball stone as the grinding medium, material: ball: water = 1: 2.2: 1) The gradation size ratio of the alumina ball stone is: φ20 accounts for 20%, φ25 accounts for 25%, φ30 accounts for 5%, φ35 accounts for 5%, φ40 accounts for 25%, φ45 accounts for 20%), after ball milling to the specified time, Detect the slurry moisture, fineness and fineness gradation. The overall size is 3000*4500mm, the rotation speed is 13r / min, the ball milling time is 23 hours, the slurry fineness D90<6μm, and the slurry moisture is controlled at about 40%.
[0066]...
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