Silica slurry obtained by wet grinding was dried by four drying methods such as freeze drying,spray drying,vacuum drying and oven drying.The influence of drying methods on the physical and chemical properties of silica after grinding was studied by the test of particle diameter,oil absorption value (DBP value),specific surface area (BET value) and microstructure.The results show that silica's median particle diameter(ds0) drops from 9.6 μm to 110 nm and its DBP value and BET value are lower than the pristine silica.The median particle diameter of silica after freeze drying drops to 73 nm,while its DBP value (2.15 mL/g) and BET value (144 m2/g) are nearest to pristine silica.%利用冷冻、喷雾、真空、烘箱干燥等4种干燥方式对对湿法研磨后的白炭黑浆料进行处理,研究干燥方式对白炭黑粒径、吸油值、比表面积和微观形貌等理化性能的影响.结果表明:研磨干燥后的白炭黑,中位径如由9.6 μm减小到110 nm以下,吸油值(DBP)与比表面积(BET)均小于研磨前;冷冻干燥样品的中位径如减小为73 nm,吸油值(2.15 mL/g)以及比表面积(144 m2/g)与原样最为接近.
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