铁精矿提品降钛试验研究  

An experimental study on the quality improvement of iron concentrate by reducing titanium content

作　　者：张云 叶国华[1] 项新月 荣一阳 宋昌溆 ZHANG Yun;YE Guohua;XIANG Xinyue;RONG Yiyang;SONG Changxu(Faculty of Land Resource Engineering,Kunming University of Science and Technology,Kunming Yunnan 650093,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

出　　处：《矿物学报》2024年第4期570-578,共9页Acta Mineralogica Sinica

摘　　要：北方某选厂铁精矿,Fe品位为64.44%,但含钛较高,达4.18%(以TiO2计),严重影响了其销售及经济效益。为此,本文针对该铁精矿的性质特点,对其开展了提品降钛的试验研究。首先,对铁精矿进行细磨以尽可能实现单体解离,磨矿细度确定为–0.025 mm粒级占90%;然后,采用弱磁–反浮联合流程,在最佳条件下(磁场强度1 400 Oe,改性淀粉用量1 100 g/t,石灰用量1 100 g/t,以油酸钠为捕收剂、用量50 g/t),获得了满意的技术指标,最终铁精矿Fe品位高达69.57%,回收率达89.49%,TiO2含量大幅降低至1.48%,很好地实现了提品降钛的目的和要求。The iron concentrate of a processing plant in North China contains 64.44%Fe.However,its high titanium oxide content of 4.18%(measured in TiO2)seriously affects its sale and economic benefit.Therefore,according to properties and characteristics of the iron concentrate,an experimental study on the quality improvement of the iron concentrate by reducing titanium content had been carried out.Firstly,the original iron concentrate was finely ground to achieve monomer dissociation as much as possible,with the determined grinding fineness of–0.025 mm for particles accounting for 90%.Then,the combined process test of low intensity magnetic and reverse flotation was adopted to process the finely ground concentrate under optimal conditions(with magnetic field intensity of 1400 Oe,modified starch dosage of 1100 g/t,lime dosage of 1100 g/t,and sodium oleate collector dosage of 50 g/t).Satisfactory technical indicators of the final iron concentrate including the Fe grade of 69.57%,TiO2 content of 1.48%,and recovery rate of 89.49%had been obtained.The great reduction of TiO2 content and increase of Fe grade of the final iron concentrate had well met the purpose and requirement for the quality improvement of original iron concentrate by reducing titanium content.

关 键 词：铁精矿 钛铁矿 磁选 反浮选 

分 类 号：TD95[矿业工程—选矿]