司家营铁矿矿石工艺矿物学特征分析

Characteristic Analysis on Ore of Sijiaying Iron Ore by Process Mineralogy

利用工艺矿物学的方法对原矿铁物相组成、矿物嵌布粒度、脉石种类以及矿物嵌布情况等进行了研究。研究结果表明,矿石中的主要铁矿物为磁铁矿和赤(褐)铁矿,赤(褐)铁矿的含量分布由采场中部向两边呈现明显的增高趋势,磁铁矿的含量分布由采场中部向南呈逐渐降低趋势;铁矿物嵌布粒度以相对中粒级为主,全区皆有分布,相对粗粒级主要分布在采场的北部,相对细粒级矿石主要分布在矿体与围岩的接触部位;难解离难选型矿石主要分布在-30 m台阶,易解离易选型矿石主要分布在-42 m台阶,这些分布规律,可以半定量化地指导现场生产。

Iron mineral phase compositions,mineral disseminated particle size,gangue kinds,mineral disseminated situation and so on of raw ore were studied by using process mineralogy method.Study results indicate,main iron minerals in ore are magnetite and hematite-limonite,content distribution of hematite-limonite presents significant increase trend from the middle of stope to both sides,content distribution of magnetite presents gradually decrease trend from the middle of stope to south;iron minerals disseminated particle size is mainly comparatively middle particle size and distributed all the mine,comparatively crude particle size mainly distributes at the north of stope,comparatively fine particle size ore mainly distributes at contact position of orebody and surrounding rock;difficult dissociated and difficult beneficiation ore mainly distribute at-30 m step,easy dissociated and easy beneficiation ore mainly distribute at-42 m step,these distribution law could guiding site production half quantitatively.