化工矿物与加工2018，Vol.47Issue(5)：17-20,27,5.DOI:10.16283/j.cnki.hgkwyjg.2018.05.005
酸解白肥制备过磷酸钙新工艺研究
New process of preparing calcium superphosphate with white phosphate fertilizer by acidolysis
摘要
Abstract
Study was conducted of the process of preparing calcium superphosphate with white phosphate fertilizer dry powder by concentrated sulfuric acid hydrolysis. The effect of the factors of sulfuric acid concentration, reaction time, dosage of sulfuric acid and fineness of white phosphate fertilizer on the quality of calcium superphosphate fresh fertilizer was investigated by single factor experiment. An orthogonal experiment was designed to obtain the influence of comprehensive factors on the white phosphate fertilizer by sulfuric acid hydrolysis. The results showed the optimal process condition being the concentration of sulfuric acid98％, the reaction time 15 minutes, the dosage of sulfuric acid100％ of the theoretical amount and the particle size of white phosphate fertilizer 0. 15 mm. The effect of sulfuric acid dosage was the most significant. The content of available phosphorus, conversion rate of water soluble-phosphorus and content of free acid in the fresh fertilizer produced by the optimized process were21. 12％, 88. 99％ and 22. 75％, respectively. After adding neutralizer, the content of free acid in the product decreased by 5. 3％ with the content of available phosphorus being 19. 59％, the conversion rate of water soluble-phosphorus 78. 65％ and the water content 3. 42％, which conforms to the national standard of premium loose calcium superphosphate product.关键词
白肥/水溶磷/游离酸/转化率Key words
white fertilizer/water-soluble phosphorus/free acid/conversion rate分类
化学化工引用本文复制引用
赵四方,王保明,刘咏,刘丽,汤建伟..酸解白肥制备过磷酸钙新工艺研究[J].化工矿物与加工,2018,47(5):17-20,27,5.基金项目
国家重点研发计划项目(2016YFD0300805) （2016YFD0300805）
国家级重大科技项目培育2015郑州大学基金. （）
