稀土冶炼分离钙皂化过程三相物的控制及废水综合循环利用工艺研究  

Research on the Control of Three Phase Substances and Comprehensive Recycling of Wastewater in the Separation of Calcium Saponification Process in Rare Earth Smelting

作　　者：江泽佐 钟春兰 赵建华 潘务霞 李宽 JIAG Ze-zuo;ZHONG Chun-lan;ZHAO Jian-hua;PAN Wu-xia;LI Kuan(Guangxi Guosheng Rare Earth New Materials Co.,Ltd.,Chongzuo 532200,China)

机构地区：[1]广西国盛稀土新材料有限公司,广西崇左532200

出　　处：《世界有色金属》2024年第24期13-15,共3页World Nonferrous Metals

基　　金：激光晶体用高纯氧化钕制备关键技术及产业化应用示范(崇科20231209);大尺寸YAG晶体用高纯稀土氧化物开发(崇科2022QN1205);特种稀土靶材用高纯稀土氧化物开发(崇科2022QN1206)。

摘　　要：在无氨皂化稀土萃取分离技术的推广中,钙(氧化钙或者氢氧化钙)皂化工艺以其原料成本低,反应温度高的优点大受稀土分离厂家的欢迎,然而因其三相物较多且处理难又制约了它的推广,减少三相物的产生直接关系到企业的安全环保和成本控制。本文结合石灰皂化工艺的特性,通过研究反应时间、过筛、助剂引入等条件减少三相物的产生实现控制三相物的目标,再开发利用皂化废水消化石灰调浆实现废水综合循环利用。响应了国家对稀土冶炼分离技术提出的低能耗、低污染的绿色生产要求。In the promotion of ammonia free saponification rare earth extraction and separation technology,the calcium (calcium oxide or calcium hydroxide) saponification process is highly welcomed by rare earth separation manufacturers due to its low raw material cost and high reaction temperature.However,its promotion is limited by the large amount of three-phase substances and difficult processing,and reducing the generation of three-phase substances directly affects the safety,environmental protection,and cost control of enterprises.This article combines the characteristics of lime saponification process,and aims to reduce the production of three-phase substances by studying reaction time,sieving,and introduction of additives,in order to achieve the goal of controlling three-phase substances.Then,it develops and utilizes saponification wastewater to digest lime slurry and achieve comprehensive recycling of wastewater.In response to the national requirements for low energy consumption and low pollution green production of rare earth smelting and separation technology.

关 键 词：稀土分离 钙皂化 三相物 控制 循环 

分 类 号：X758[环境科学与工程—环境工程]