摘要
为了提高西石砬子赤褐铁矿选别效果,通过化学多元素分析、XRD分析、铁物相分析等手段,对有代表性的矿石进行了系统的工艺矿物学研究。结果表明:①齐大山西石砬子赤褐铁矿TFe品位27.88%,主要脉石成分SiO2含量为55.65%,有害成分P、S含量分别为0.006%、0.005%。②矿石中金属矿物主要为赤铁矿和磁铁矿,褐铁矿少量、黄铁矿微量;非金属矿物主要为石英,此外,还有少量绿泥石和白云母。矿石中的铁主要为赤、褐铁矿,其次为磁性铁。③矿石结构为自形—半自形晶结构、假象结构、残余结构及交代结构;矿石构造主要为条纹状构造和浸染状构造。④矿石中原生赤铁矿与磁铁矿相互嵌布,磁铁矿氧化蚀变生成假象赤铁矿,次生赤铁矿呈斑点状、细脉状、网脉状和蛛丝状分布在磁铁矿中。赤铁矿与磁铁矿呈不混溶连晶颗粒,二者彼此难以解离,可一起回收。矿石中少量褐铁矿呈细脉状填充在赤铁矿粒间及内部,与赤铁矿的嵌布关系复杂。⑤石英主要以自形粒状集合体产出,嵌布粒度细,粒间嵌布有少量细粒绿泥石、白云母。⑥磁铁矿和赤铁矿以中粒嵌布为主,细粒级含量大,-0.038 mm粒级中分布率高达20.22%,较难完全单体解离,易流失于尾矿中,回收难度大。
In order to improve the separation effect of hematite and limonite in Xishilazi,systematic process mineralogy research was carried out on representative ores through chemical multi-element analysis,XRD analysis,iron phase analysis and so on.The results showed that:①The TFe grade of hematite and limonite in Xishilazi of Qidashan is 27.88%,and the contents of the main gangue component SiO2 is 55.65%.The contents of harmful elements P and S in the ore are 0.006%and 0.005%,respectively.②The main metallic minerals in the ore are hematite and magnetite,followed by a small amount of limonite and a trace of pyrite.Non-metallic minerals are mainly quartz and a small amount of chlorite and muscovite.The iron in the ores mainly occurs in hematite and limonite,followed by magnetic iron.③The ore structure consists of automorphic to semi-automorphic crystal structure,pseudomorphic structure,residual structure and metasomatic structure.The ore is mainly in the form of striped structure and disseminated structure.④Primary hematite and magnetite are mutually embedded in the ore.Magnetite is oxidized and altered to generate pseudo hematite,and secondary hematite is speckled,veined,reticulated and spider-like distribution in the magnetite.Hematite and magnetite are immiscible intergranular particles,and the two are difficult to dissociate from each other and could be recovered together.⑤Quartz is mainly produced in automorphic granular aggregates,with fine dissemination particle size,and a small amount of fine chlorite and muscoite are embedded between particles.⑥Magnetite and hematite are mainly distributed in medium grains,and the contents of fine grains is large.The distribution rate bellow 0.038 mm grain size is as high as 20.22%.It is difficult to achieve completely monomer separation and easy to be lost in tailings,causing difficult in recovery.
作者
刘应志
张淑敏
李艳军
袁帅
LIU Yingzhi;ZHANG Shumin;LI Yanjun;YUAN Shuai(School of Resources and Civil Engineering,Northeastern University,Shenyang 110819,China;National-local Joint En-gineering Research Center of High-efficient Exploitation Technology for Refractory Iron Ore Resources,Shenyang 110819,Chi-na;State Key Laboratory of Rolling and Automation,Northeastern University,Shenyang 110819,China)
出处
《金属矿山》
CAS
北大核心
2021年第7期110-114,共5页
Metal Mine
基金
国家自然科学基金重点项目(编号:51734005)。
关键词
工艺矿物学
嵌布特征
赤铁矿
磁铁矿
processing mineralogical
dissemination characteristics
hematite
magnetite
