饲料级脱氟磷酸三钙制备的研究  

Study on preparation of feed-grade defluorinated calcium phosphate

作　　者：徐艳丽[1] 周贵云[1] 郭举[1] 

机构地区：[1]四川大学化学工程学院,四川成都610065

出　　处：《化工矿物与加工》2008年第11期9-12,共4页Industrial Minerals & Processing

摘　　要：以四川磷矿为原料，在高温焙烧炉中采用磷酸法高温烧结工艺，较为系统地研究了焙烧时间、焙烧温度、磷酸配比和反应器对磷矿分解和脱氟反应的影响。结果表明：焙烧时间、焙烧温度、磷酸配比和反应器的传质特性对磷矿分解和脱氟反应均有显著影响。在改进型反应器中，焙烧时间≥90min、焙烧温度1180～1230℃、磷酸配比24％～27％、磷酸质量分数45％，产品中P205质量分数可达41．0％～42．5％，而F质量分数≤0．16％。Studies were carried out into effects reaction time and temperature, ratio of phosphorous acid added into the feed materials, reactor＇ s mass transfer characteristic and other factors exert on phosphate rock decomposition and defluorination using thermal-acid method with Sichuan phosphate ore as material. The results indicated that they have great impacts on phosphate rock decomposition and defluorination in the improved reactor with the reaction time≥90 min, roasting temperature 1180-1230℃, phosphoric acid ratio of 24 % - 27 %, 45 % of phosphoric acid concentration, product of P2O5 of up to 41.0% to 42.5 %, while F≤0.16%.

关 键 词：脱氟磷酸三钙 焙烧 磷酸 饲料添加剂 反应器 

分 类 号：TQ126.3[化学工程—无机化工]