FFP卧式快开压滤机在锂云母精矿脱水系统中的应用  

Application of FFP Horizontal Fast-opening Filter Press in Dewatering System of Lepidolite Concentrate

作　　者：郭伟 陈一锋 谢添 唐立靖 GUO Wei;CHEN Yifeng;XIE Tian;TANG Lijing(Fengxin Times New Energy Resources Co.,Ltd.,Yichun 336000,China;Yichun Times New Energy Resources Co.,Ltd.,Yichun 336000,China)

机构地区：[1]奉新时代新能源资源有限公司,江西宜春336000 [2]宜春时代新能源资源有限公司,江西宜春336000

出　　处：《有色金属工程》2024年第7期115-120,共6页Nonferrous Metals Engineering

基　　金：国家重点研发计划项目(2023YFC2908202);江西省重点研发计划(20214BBG74001)。

摘　　要：江西宜春地区的锂云母精矿普遍使用带式过滤机进行脱水,带式过滤机不仅设备占地面积大,而且脱水效率低,过滤后的锂云母精矿水分偏高,普遍大于18%,锂云母精矿水分偏高直接导致了运输成本及下游碳酸锂厂烘干成本高。为了解决这一问题,宜春地区某选矿厂采用某厂家生产的FFP卧式快开压滤机对锂云母精矿进行脱水,考察了FFP卧式快开压滤机滤布种类、循环时间、工作压力、锂云母精矿助滤剂类型、助滤剂用量对锂云母过滤时精矿水分的影响。结果表明:FFP卧式快开压滤机使用锦纶单丝透气率300 L/(m^(2)·min)滤布、循环时间930 s、工作压力1.1 MPa、助滤剂使用聚合氯化铝450 g/t时,锂云母精矿水分为13.8%,明显低于宜春地区其他选矿厂的锂云母精矿水分。助滤剂聚合氯化铝有利于降低水分,这是因为聚合氯化铝分子链固定在不同的细颗粒或者极细颗粒表面上,各细颗粒或者极细颗粒之间形成聚合物的桥形成聚集体,在过滤过程中聚集体不会造成滤布的滤孔堵塞。相比带式过滤机,宜春地区某选矿厂使用的FFP卧式快开压滤机具有设备占地面积小、脱水效率高、自动化程度高等特点,解决了宜春地区锂云母精矿水分偏高的行业难题,系首次在锂云母选矿行业中大规模成功应用,在行业中具有十分重要的示范意义,未来应用前景广阔。Lemica concentrate in Yichun area of Jiangxi province uses widely belt filter for dehydration,The belt filter equipment not only occupies a large area,but also has a low dehydration efficiency,filtered lemica concentrate is high in water content,generally greater than 18%,the lemica concentrate with high water content directly increases the transportation costs and downstream lithium carbonate plant drying costs.In order to solve this problem,a concentrator in Yichun area used FFP horizontal fast-opening filter press produced by a certain manufacturer to dehydrate leucite concentrate.The effects of FFP horizontal fast-opening filter press filter cloth type,cycle time,working pressure,filter aid type and dosage of leucite concentrate on the water content of the leucite concentrate were investigated.The test results show that when the FFP horizontal fast opening filter press uses nylon monofilm filter cloth with air permeability of 300 L/(m^(2)·min),cycle time of 930 s,working pressure of 1.1 MPa,and the filter aid uses polyaluminum chloride 450 g/t,the water content of lemica concentrate is 13.8%,which is obviously lower than that of other concentrator in Yichun area.Filter aid polyaluminum chloride is conducive to reducing water,this is because the molecular chain of polyaluminum chloride is fixed on the surface of different fine particles or very fine particles,and the bridge between the fine particles or very fine particles forms a polymer aggregate,and the aggregate will not cause the filter hole blockage of the filter cloth during the filtration process.Compared with the belt filter,the FFP horizontal fast-opening filter used by a concentrator in Yichun area has the characteristics of small area-occupation,high dehydration efficiency and high degree of automation,which solves the industry problem of high water content of the leucite concentrate in Yichun area.It is the first large-scale successful application in the leucite mineral processing industry,and has a very important demonstration significance in th

关 键 词：FFP卧式快开压滤机 锂云母精矿 脱水 

分 类 号：TD954[矿业工程—选矿]