梅山自产铁矿石矿物工艺学研究  

Study on Mineral Technology of Meishan Self-produced Iron Ore

作　　者：勾金玲 甘茂武 GOU Jinling;GAN Maowu(Baowu Resources Nanjing Meishan Mining Co.,Ltd.)

机构地区：[1]宝武资源南京梅山矿业公司,江苏省南京市210036

出　　处：《现代矿业》2024年第2期152-156,共5页Modern Mining

摘　　要：为更好地开发利用梅山铁矿石资源,开展了工艺矿物学研究。结果表明:①半自熔性混合铁矿石中有回收价值的铁矿物磁铁矿、赤褐铁矿、假象赤铁矿中的铁总分布率达73.97%;磁铁矿多为粒状、不规则粒状、多孔不规则状,粒度悬殊,一般在0.03~0.6 mm,粗粒中常包裹有不等量的细小脉石颗粒,磁铁矿普遍发生了氧化蚀变,生成假象赤铁矿及赤铁矿,因而磁铁矿与赤铁矿共生关系紧密;假象赤铁矿部分与磁铁矿紧密交生产出,部分形成独立的矿粒,粒度一般在0.02~0.3 mm;赤铁矿多为不规则粒状、多孔状,粒度一般在0.015~0.4 mm,只有少部分赤铁矿呈单独矿物出现,与脉石矿物的嵌布关系较磁铁矿紧密。②不同种类的脉石矿物常构成脉石集合体,部分嵌布在不同种类铁矿物间隙,方解石、白云石结晶粒度较粗,与菱铁矿嵌布密切;石英晶粒较细小,部分聚集为集合体,分布较为分散,在脉石矿物及铁矿物间隙中均有嵌布;长石、云母等硅酸盐矿物分布较分散,多与细小石英混杂呈岩屑嵌布在不同矿物间。③在碎至-2 mm样品中,磁(赤)铁矿、菱铁矿单体较少,磁(赤)铁矿单体加富连生体合计占68.55%,这为在较粗粒度下进行预富集创造了条件,有利于减少后续磨选矿量,提高后续磨选给矿品位,减少细粒尾矿量,达到良好的节能减排、降本增效效果。In order to better develop and utilize Meishan iron ore resources,process mineralogy re-search was carried out.The results show that:①The total distribution rate of iron in magnetite,hematite-li-monite and pseudo-hematite with recovery value in semi-self-fluxing mixed iron ore is 73.97%.Magnetite is mostly granular,irregular granular,porous irregular shape,particle size disparity,generally in 0.03~0.6 mm.Coarse particles are often wrapped with unequal amounts of fine gangue particles.Magnetite is general-ly oxidized and altered to form pseudo-hematite and hematite.Therefore,magnetite and hematite are closely related.Part of the pseudo-hematite is produced by close intersection with magnetite,and part of it forms in-dependent ore particles with a particle size of 0.02~0.3 mm.The hematite is mostly irregular granular and porous,and the particle size is generally 0.015~0.4 mm.Only a small part of hematite appears as a sepa-rate mineral,which is more closely related to the dissemination of gangue minerals than magnetite.②Differ-ent kinds of gangue minerals often constitute gangue aggregates,some of which are embedded in the gaps of different kinds of iron minerals.Calcite and dolomite have coarse crystal size and are closely embedded with siderite.Quartz grains are relatively small,some of which are aggregated into aggregates,and the distribu-tion is relatively dispersed,which are embedded in the gap between gangue minerals and iron minerals.The distribution of silicate minerals such as feldspar and mica is more dispersed,and they are mostly mixed with fine quartz and are rock debrisembedded in different minerals.③In the sample broken to-2 mm,the magne-tite(hematite)and siderite monomers are less,and the magnetite(hematite)monomer enrichment inter-growth accounts for 68.55%.This creates conditions for pre-enrichment under coarser granularity,which is conducive to reducing the amount of subsequent grinding and beneficiation,improving the feed grade of sub-sequent grinding and beneficiation,reducing the amount of

关 键 词：工艺矿物学 混合型铁矿石 磁铁矿 赤铁矿 菱铁矿 脉石矿物 嵌布粒度 

分 类 号：TD951[矿业工程—选矿]