某铁矿破碎筛分及干式预选工艺试验  

Experiment of Crushing,Screening and Dry Presorting System in an Iron Mine

作　　者：王琦 王俊祥 张晓伟 冯赵屹 WANG Qi;WANG Junxiang;ZHANG Xiaowei;FENG Zhaoyi(Anhui Masteel Zhangzhuang Mining Co.,Ltd.;Masteel Group Design&Research Institute Co.,Ltd.)

机构地区：[1]安徽马钢张庄矿业有限责任公司,安徽省六安市237471 [2]马钢集团设计研究院有限责任公司

出　　处：《现代矿业》2024年第11期139-144,共6页Modern Mining

摘　　要：某铁矿选矿厂现有干式预选工艺为筛上(+30 mm)、筛下(30~0 mm)分别进行抛尾,但筛上进行抛尾时,+30 mm尾矿作为建材存在不符合市场需求、需进一步加工整形等问题。为探究全粒级(30~0 mm)干式预选的可行性,以及该工艺调整后对后续设备的影响,试验研究选择破碎筛分及干式预选系统作为突破点,采用流程考察、实验室试验研究及工业试验相结合的方式,多维度对该段工艺的调整进行探究并提出合理建议。研究结果表明:30~0 mm全粒级干式预选可以在一定程度上提高干选粗精矿的TFe回收率,同时抛尾产品粒级更符合建材市场需求,干式预选尾矿附加值得到提高;取消筛上干抛时,需根据矿石性质同时开启现有2台细碎设备,改造提升部分胶带机输送能力等;建议选厂根据建材市场及生产需求,对是否取消块矿抛尾适应性选择。The existing dry pre-separation process of an iron concentrator is to discard the tailings above screen(+30 mm)and under screen(30~0 mm)respectively.However,when the tailings are discarded on the above screen,the+30 mm tailings which are used as building materials cannot meet the market demand,which needs further processing and shaping.In order to explore the feasibility of full-size(30~0 mm)dry pre-separation and the impact of the process adjustment on subsequent equipment,the crushing screening and dry pre-separation system is selected as the breakthrough point in the experimental study.The adjustment of the process was explored in multiple dimensions and reasonable suggestions are put forward by combining of process investigation,laboratory test research and industrial test.The results show that the dry pre-separation of 30~0 mm full-size fraction can improve the TFe recovery rate of the rough concentrate in a certain extent.At the same time,the particle size of the tailings can better meet the demand of the building materials market,and the added value of the dry pre-separation tailings is improved.When the tailings above screen discard are canceled,it is necessary to add two existing fine crushing equipment at the same time according to the nature of the ore,and transform and improve the conveying capacity of some belt conveyors.It is suggested that the concentrator can choose whether to cancel the tailings above screen discard according to the building materials market and production demand.

关 键 词：磁铁矿 流程考查 全粒级 干式预选 工艺优化 

分 类 号：TD951[矿业工程—选矿]