水平磁场高梯度磁选机的改进及其在攀西某钛铁矿的应用  

Improvement of High Gradient Magnetic Separator with Horizontal Magnetic Field and Its Application for Ilmenite in Panxi Region

作　　者：刘建国 戴惠新[1] 于丽丽 冯嘉颖 王在华 LIU Jian Guo;DAI Huixin;YU Lili;FENG Jiaying;WANG Zaihua(Faculty of Land Resources Engineering,Kunming University of Science and Technology,Kunming 650093,Yunnan,China;Institute of Resources Utilization and Rare Earth Development,Guangdong Academy of Sciences,Guangzhou 510650,Guangdong,China;State Key Laboratory of Separation and Comprehensive Utilization of Rare Metals,Guangzhou 510650,Guangdong,China;Guangdong Key Laboratory of Mineral Resources Development and Comprehensive Utilization,Guangzhou 510650,Guangdong,China)

机构地区：[1]昆明理工大学国土资源工程学院,云南昆明650093 [2]广东省科学院资源利用与稀土开发研究所,广东广州510650 [3]稀有金属分离与综合利用国家重点实验室,广东广州510650 [4]广东省矿产资源开发与综合利用重点实验室,广东广州510650

出　　处：《矿产保护与利用》2024年第3期109-116,共8页Conservation and Utilization of Mineral Resources

基　　金：广东省基础与应用基础研究基金(2022A1515012165);广东省重点领域研发计划项目(2022B0303030002);广东省科学院专项资金项目(2022GDASZH−2022010104,2023GDASZH−2023010104)。

摘　　要：水平磁场高梯度磁选机具有磁系不易腐蚀、磁介质不易堵塞等特点,用于钛铁矿粗选效果良好,但该型设备受磁系间距限制,分选环宽度、磁介质体积量较小,影响处理量,且激磁能耗高,需要对其进行改进,提高处理量、降低能耗。以SSS-Ⅱ-2750水平磁场高梯度磁选机为基础,对其分选环系统进行了改进,在磁系高度方向增加分选环厚度,并分成内外双层环,并对内层环配置粗介质棒的介质盒以吸附粗粒、强磁性目的矿物,对外层环配置细介质棒的介质盒以吸附细粒、微细粒磁性较弱的目的矿物,可实现梯级分选,同时,内外环均配置卸矿装置,分层卸矿,可有效保障目的矿物的卸矿效率。在攀西地区某选钛厂钛铁矿一段粗选工序考察其效果,在磁场强度0.45 T、立环转速6.2 r/min、冲程10 mm、冲次120 r/min、给矿量160t/h、原矿TiO_(2)品位10.42%的条件下,改进后的水平磁场高梯度磁选机可获得TiO_(2)品位18.55%、回收率85.78%的钛粗精矿。与改进前磁选机、垂直磁场高梯度磁选机相比,其钛粗精矿品位与其他两种设备相近,但回收率分别高8.43、13.63百分点,分选效果好,同时改进后的水平磁场高梯度磁选机的激磁能耗在三种设备中最低,为0.49 kW·h/t,表明该设备处理量大且能耗低,实现了设备改进目的。The High Gradient Magnetic Separator(HGMS)with a horizontal magnetic field has many characteristics,including resistance to corrosion of the magnetic system and a low propensity for the magnetic medium to become blocked.Consequently,the HGMS has a significant effect on the rough separation of ilmenite.However,the limited spacing of the magnetic system,the narrow width of the sorting ring,and the small volume of the magnetic medium result in low processing capacity and high energy consumption.Therefore,equipment improvements are necessary to enhance the processing capacity and reduce energy consumption.Based on the SSS−II−2750 horizontal magnetic field HGMS,the separation ring system was enhanced.The thickness of the separation ring was increased in the height direction of the magnetic system,and the inner and outer double rings were divided.The medium box equipped with a coarse medium rod in the inner ring adsorbed coarse grain and strong magnetic target minerals,while the medium box with a fine medium rod in the outer ring adsorbed fine grain and micro−fine grain with weak magnetic target minerals,achieving cascade sorting.At the same time,both inner and outer rings were equipped with ore unloading devices to realize layered ore unloading,effectively improving the ore unloading rate of the target minerals.The effect of the first stage roughing process of ilmenite in a titanium separation plant in the Panxi area was investigated.The improved HGMS with a horizontal magnetic field yielded titanium crude concentrates with a TiO_(2)grade of 18.55%and a recovery of 85.78%,under conditions of a magnetic field strength of 0.45 T,vertical ring speed of 6.2 r/min,stroke length of 10 mm,stroke frequency of 120 r/min,ore feed rate of 160 t/h,and raw ore TiO_(2)grade of 10.42%.Compared with the pre−improvement and vertical magnetic field,the improved HGMS achieved a similar titanium crude concentrate grade but increased the recovery rate by 8.43 and 13.63 percentage points,respectively.The improved HGMS with a horizo

关 键 词：水平磁场 高梯度磁选机 钛铁矿 磁选 

分 类 号：TD924[矿业工程—选矿] TD457