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以工业生产氯化钴溶液为钴源,碳酸氢铵为沉淀剂,采用液相法制备碳酸钴。系统研究了沉淀过程碳酸氢铵用量、碳酸氢铵浓度、保温时间、陈化时间和反应温度对母液钴浓度和钴沉淀率的影响,得到优化沉淀工艺条件:碳酸氢铵单耗3.173g/g、碳酸氢铵浓度250g/L、保温时间10min、陈化时间30min、反应温度33℃,在优化条件下,母液钴浓度为0.045g/L,钴沉淀率达99.92%。碳酸钴粒度分布均匀且范围窄,D50=1.428-1.488μm,形貌为小颗粒球形团聚体,物相纯度高。
Abstract：Cobalt carbonate precursor was prepared by liquid phase synthesis method with cobalt chloride as cobalt source and NH_4HCO3 as precipitator. Effects of dosage and concentration of ammonium bicarbonate,holding time,aging time,and reaction temptation on Co2+ concentration in mother liquor and Co precipitation rate were discussed.The results show that Co2+concentration in mother liquor is 0.045 g/L and Co precipitation rate is 99.92% under the optimum conditions including dosage of ammonium bicarbonate of 3.173 g/g,concentration of ammonium bicarbonate of 250 g/L,holding time of 10 min,aging time of 30 min,and reaction temperature of 33 ℃.Cobalt carbonate precursor has uniform particle size distribution with D50=1.428-1.488μm,agglomerate with spherical particle as well as pure phase.
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基本信息:
中图分类号:O614.812
引用信息:
[1]吴理觉,郭欢,文定强,等.液相法制备碳酸钴及其结构表征[J].有色金属(冶炼部分),2020(01):73-78.
基金信息:
广东省扬帆计划引进创新创业团队专项基金项目(粤财教[2017]108号)
2020-01-12
2020-01-12