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4.2二級旋轉(zhuǎn)閃蒸干燥實驗
在二級旋轉(zhuǎn)閃蒸干燥實驗(表3)中，采用旋轉(zhuǎn)閃蒸干燥機將一級螺旋式干燥半成品通過旋轉(zhuǎn)閃蒸干燥實驗，使最終產(chǎn)品附著水小于0.15％，且無結(jié)塊結(jié)粒，物理化學(xué)指標(biāo)符合標(biāo)準(zhǔn)值。
表3中3組實驗的微粉氫氧化鋁產(chǎn)品均松散呈粉面狀，無結(jié)粒結(jié)塊現(xiàn)象，流動性好，附著水小于0.15％；從表4實驗數(shù)據(jù)看出，干燥后微粉級氫氧化鋁產(chǎn)品粒度與干燥前相比較基本上保持不變，符合原料粒度值，達(dá)到了干燥目的，而且干燥后微粉級氫氧化鋁的物理化學(xué)指標(biāo)均符合標(biāo)準(zhǔn)值。
表3 旋轉(zhuǎn)閃蒸干燥實驗數(shù)據(jù)
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