摘要
钒钛磁铁矿作为我国重要的战略性矿产资源,其综合利用面临越来越严峻的挑战,如何有效开发成为当前的迫切任务。某低品位钒钛磁铁矿中TFe、TiO_(2)质量分数分别为11.83%、2.77%,有价元素除铁、钒、钛外,其他元素均未达到可综合利用的程度。为此,本文基于该矿的性质特点,进行干式磁选抛废、湿式磁选抛废以及多级抛废等条件试验,并制定合理的抛废工艺流程和作业参数。结果表明:该矿的矿物组成复杂,金属矿物主要是12.46%的钛磁铁矿和3.19%的钛铁矿,以及少量磁黄铁矿、赤铁矿、镁铝尖晶石和黄铜矿等;脉石矿物主要为长石类、透辉石、绿泥石等;Ti元素主要以钛铁矿、钛磁铁矿及榍石形式赋存,V元素大部分赋存在钛磁铁矿中。最优的抛废预选工艺流程:将原矿破碎至0~10 mm粒度,在切向速度为1.2 m/s、磁场强度为3500 GS的条件下进行干式磁选抛尾;进一步将获得的粗选精矿破碎至<3 mm粒度,并在3500 GS磁场强度下进行湿式精选。最终得到抛废精矿的产率为44.30%、TFe的质量分数和回收率分别为19.44%和77.31%、TiO_(2)的质量分数和回收率分别为4.64%和75.30%。通过该工艺流程可以抛掉产率为55.70%、TFe和TiO_(2)质量分数分别为4.54%、1.21%的废石,抛废效果良好,且磨矿能源消耗降低,品位提高,有利于后续的选别作业。本文试验方法可为类似资源的开发利用提供借鉴,同时证明抛废预选技术用于低品位钒钛磁铁矿磨选作业前预处理的可行性和必要性。
As an important strategic mineral resource in China,the comprehensive utilization of vanadium titanomagnetite is facing more and more severe challenges,and how to effectively develop it has become an urgent task at present.The mass fractions of TFe and TiO_(2) in a low-grade vanadium titanomagnetite are 11.83%and 2.77%respectively.Except for iron,vanadium and titanium,other elements of valuable elements have not reached the level of comprehensive utilization.Therefore,based on the characteristic nature of the mine,the dry magnetic separation waste disposal,wet magnetic separation waste disposal and multi-stage waste disposal conditions are tested,and a reasonable waste disposal process and operation parameters are formulated.The results show that the mineral composition of the mine is complex,and the metal minerals are mainly 12.46%titanomagnetite and 3.19%ilmenite,as well as a small amount of pyrrhotite,hematite,magnesium-aluminum spinel and chalcopyrite.Gangue minerals are mainly feldspar,diopside,chlorite,etc.;Ti is mainly in the form of ilmenite,titanomagnetite and vinyl,and V is mostly deposited in titanomagnetite.The optimal technological process of pre-selection and waste ore discarding:the raw ore is crushed to a particle size of 0~10 mm,and the dry magnetic separation discarding tailings is carried out under the conditions of tangential velocity of 1.2 m/s and magnetic field strength of 3500 GS.The obtained coarse concentrate crushing is further crushed to a particle size of<3 mm and wet selection is performed at a magnetic field strength of 3500 GS.Finally,the yield of waste ore discarding concentrate is 44.30%,the mass fraction and recovery rate of TFe are 19.44%and 77.31%,respectively,and the mass fraction and recovery rate of TiO_(2) are 4.64%and 75.30%,respectively.Through this process,the waste rock with a yield of 55.70%,TFe and TiO_(2) mass fractions of 4.54%and 1.21%can be discarded,respectively,and the waste ore throwing effect is good,and the grinding energy consumption is reduced and the grade is improved,which is conducive to the subsequent separation operation.The experimental method can provide a reference for the development and utilization of similar resources,and at the same time prove the feasibility and necessity of pre-selection and waste ore discarding technology for pretreatment of low-grade vanadium titanomagnetite grinding operations.
作者
余海钊
杨卓
赵强
张鹏羽
蒋权
李文涛
卢兴福
YU Haizhao;YANG Zhuo;ZHAO Qiang;ZHANG Pengyu;JIANG Quan;LI Wentao;LU Xingfu(Zhongye Changtian International Engineering Co.,Ltd.,Changsha 410205,Hunan,China;School of Resources and Environment Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,Jiangxi,China)
出处
《烧结球团》
北大核心
2025年第3期122-131,共10页
Sintering and Pelletizing
基金
国家重点研发计划资助项目(2021YFC2902305)
湖南省培育世界一流湘版科技期刊建设工程资助项目(2024ZL6020&2023ZL8002)
湖南省科技创新计划资助项目(2022RC1049)。
关键词
钒钛磁铁矿
抛废预选
干式磁选
湿式磁选
vanadium titanomagnetite
pre-selection and waste ore discarding
dry magnetic separation
wet magnetic separation
作者简介
余海钊(1985-),男,副编审/高级工程师,从事铁矿烧结球团相关技术研究及论文编审工作;通信作者:杨卓(1994-),男,博士研究生,工程师,从事选矿、冶金及固废综合利用方面的研究工作。
