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摘要:
近年来鞍千地区采出矿石性质变化较大，为给该矿石选矿工艺流程的制定提供依据，有必要对其进行详尽的工艺矿物学研究。本文借助光学显微镜、化学分析、X射线衍射等分析检测手段，对鞍千区域矿石样本的化学组成、矿物组成、浸染粒度及嵌布特性施行了综合而系统的研究。研究结果表明：矿石中铁品位为29.25%，主要含铁矿物为磁铁矿、赤铁矿、褐铁矿、黄铁矿，其中磁铁矿含量31.65%，赤铁矿含量6.53%，为磁铁矿型铁矿石；脉石以石英为主，含量达45.44%，其次为角闪石。矿石中赤铁矿中自形晶结构较为多见，磁铁矿中半自形晶结构较为多见，个别磁铁矿为两种及两种以上矿物间的交代构造。磁铁矿与赤铁矿的粒度不匀，可择取多段磨矿多段磁选选别工艺。
Abstract:In recent years, the properties of the ore mined in the Anqian area have changed greatly. In order to provide a basis for the formulation of the ore beneficiation process, it is necessary to carry out detailed process mineralogical research. In this paper, with the help of optical microscope, chemical analysis, X-ray diffraction and other analysis and detection methods, a comprehensive and systematic study on the chemical composition, mineral composition, dissemination particle size and inlay characteristics of the ore samples in the Anqian area was carried out. Research results show that the iron grade in the ore is 29.25%, and the main iron-bearing minerals are magnetite, hematite, limonite, and pyrite. The magnetite content is 31.65% and the hematite content is 6.53%. Iron ore type iron ore; gangue is mainly quartz, with a content of 45.44%, followed by hornblende. The automorphic crystal structure is more common in hematite in the ore, and the semi-automorphic crystal structure is more common in the magnetite. Individual magnetite is an alternate structure between two or more minerals. The particle size of magnetite and hematite is uneven, and the multi-stage grinding and multi-stage magnetic separation process can be selected.
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Key words:
- Mineralogy /
- Dissemination characteristics /
- Magnetite ore /
- Mineral composition
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表 1 矿石化学成分分析/%
Table 1. Analysis of chemical composition of ore
TFe FeO SiO2 Al2O3 CaO MgO S P 29.25 10.93 47.07 0.36 2.82 2.63 0.083 0.044 
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表 2 铁物相分析
Table 2. Iron chemical phase analysis results of the ore
名称 磁铁矿
中铁赤（褐）铁
矿中铁碳酸铁
中铁硅酸铁
中铁硫化铁
中铁总铁 含量/% 23.70 4.06 1.03 0.97 0.23 29.99 分布率/% 79.02 13.55 3.43 3.23 0.77 100.00
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表 3 矿石中主要矿物组成及含量/%
Table 3. Main minerals composition and contents of the ore
磁铁矿 赤铁矿 褐铁矿 黄铁矿 黄铜矿 石英 31.65 6.53 0.35 0.66 微量 45.44 角闪石 碳酸盐矿物 辉石 绢云母 绿泥石 合计 9.56 3.04 1.52 0.71 0.54 100.00 注：碳酸盐矿物主要有方解石、石灰石、白云石、菱镁矿等。
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表 4 粒度统计结果
Table 4. Grain dissemination results
粒度/mm 磁铁矿
分布率/%累计
分布率/%赤铁矿
分布率/%累计
分布率/%+0.15 29.45 29.45 8.67 8.67 −0.15+0.1 13.88 43.33 20.23 28.90 −0.1+0.075 16.30 59.63 11.48 40.38 −0.075+0.053 12.47 72.10 14.90 55.28 −0.053+0.038 14.99 87.09 15.36 70.64 −0.038 12.91 100.00 29.36 100.00
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