摘要:
对硫酸氧钛溶液的水解过程进行了试验研究,着重考察了钛液加料速率对低浓度钛液水解率、变灰点、水解物一次及二次颗粒尺寸等的影响。结果表明,随着加料速率的降低,钛液的水解率增加,这是因为慢的加料速率增大了初期钛液稀释度且其持续时间较长,形成晶种数量更多;随着加料速率降低,钛液变灰的时间缩短;加料速率影响了水解物一次颗粒尺寸,慢的加料速率有助于形成细小均匀的一次颗粒;低浓度水解物颗粒(二次颗粒)的平均粒径在1.69~1.78μm,随着加料速率降低,所得水解产物的粒度分布变窄,且水解物从无规则、较为密实的颗粒逐渐向球形、疏松颗粒变化。通过关于加料速率的研究,对钛液水解生产工艺改进起到进一步指导作用。
关键词:
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二氧化钛 /
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硫酸氧钛 /
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水解 /
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加料速率
Abstract:
The hydrolysis of titanyl sulfate solutions was investigated,mainly focusing on the influence of feed speed of titanium solution on hydrolysis rate,gray-turning point of solution,size of primary and secondary particles for hydrolysis.The results show that with decrease in feed rate the hydrolysis rate of titanium solution increases,since the dilution extent of initial titanyl sulfate solution is enhanced with longer duration by slow feed speed which results in more formed seed crystals.The gray-turning time for the solution is shortened with decrease of feed speed.The size of primary hydrolysis particles is affected by feed rate that a slower feed speed contributes to the formation of fine-uniform primary particles.The average particle size of hydrolysate from low-concentration of titanium solution is 1.69~1.78 μm.With decrease in feed speed,the size distribution of obtained hydrolysate becomes narrow,and the morphology of the hydrolysate gradually transforms from irregular-dense to spherical-loose particles.This research could provide guidance to further improvement for the production process of titanium solution hydrolysis.
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