某化工副产铁泥工艺矿物学研究  

Mineralogical study of the iron sludge as a by-productof a chemical plant

作　　者：张琦[1] 李智力[1] 廖杰 唐远 何东升[1] 陈红兵 安建平 Zhang Qi;Li Zhili;Liao Jie;Tang Yuan;He Dongsheng;Chen Hongbing;An Jianping(School of Resources&Safety Engineering,Wuhan Institute of Technology,Wuhan Hubei 430074,China;Chuyuan High Tech Group Co.,Ltd.,Jingzhou Hubei 434400,China)

机构地区：[1]武汉工程大学资源与安全工程学院,湖北武汉430074 [2]楚源高新科技集团股份公司,湖北荆州434400

出　　处：《化工矿物与加工》2022年第6期45-48,共4页Industrial Minerals & Processing

基　　金：湖北省尾矿(渣)资源化利用工程技术研究中心项目(2019ZYYD070);湖北省技术创新专项(对外科技合作类)(2019AH056);武汉工程大学科学基金研究项目(K2021099,K202064)。

摘　　要：以某化工副产铁泥试样为研究对象,采用X射线荧光光谱分析和矿物自动分析系统详细分析了其矿物组成和矿物赋存状态等工艺矿物学特征,结果表明:试样的Fe_(2)O_(3)质量分数为94.83%,SiO_(2)、S的质量分数分别为2.07%、1.37%;试样中主要有用矿物为磁铁矿和赤铁矿,质量分数分别为83.22%和13.44%,脉石矿物有橄榄石、黄铁矿、石英等;主要矿物磁铁矿以它形粒状为主,以浸染状较密集分布于矿石中,部分较粗颗粒以团块状与脉石矿物包裹共生;次要矿物赤铁矿呈中等稠密、稀疏或星散浸染状嵌布于脉石中,偶见少量条带状赤铁矿和黑云母嵌布在矿石边缘或被包裹于磁铁矿中;磁铁矿和赤铁矿粒度较细,主要集中在7.88~15.77μm,单矿物粒度在37.5μm以下的累积占有率分别为75.77%和96.37%,单体解离度分别为73.64%和59.79%。铁泥磁选后可通过热分解法、水热法或共沉淀法针对目标污染物的特性制备铁泥基磁性吸附剂和催化剂应用于废水中污染物的去除。In this paper,X-ray fluorescence spectroscopy and automated mineral identification and characterization system were employed to perform mineralogical study including the mineral composition and occurrence of minerals in the iron sludge as a by-product of a chemical plant.The results show that the sample contained 94.83%Fe_(2)O_(3),2.07%SiO_(2),1.37%S.The valuable minerals in the sample were mainly magnetite and hematite with content of 83.22%and 13.44%respectively.Gangue minerals were composed of olivine,pyrite,quartz,and biotite etc.The magnetite as the primary valuable mineral exhibited irregular granules and was densely disseminated in the ore.Some of the coarse and lumpy magnetite granules were intergrown with gangue minerals.The secondary valuable mineral,hematite presented moderately dense,few and scattered,was disseminated in the gangue minerals.A small amount of banded hematite and biotite were disseminated in the margin of the ore or enclosed in magnetite occasionally.Magnetite and hematite had fine particle size ranging from 7.88 to 15.77μm,and the cumulative percentage of size fractions below 37.5μm were 75.77%for magnetite and 96.37%for hematite.The liberation degree of magnetite and hematite were 73.64%and 59.79%respectively.After magnetic separation,the iron sludge was subjected to treatment by thermal decomposition method,hydrothermal method or co-precipitation method for preparation of iron sludge-based magnetic materials as per the characteristics of target pollutants,which can be used as adsorbent and catalyst for removal of pollutants from the wastewater.

关 键 词：铁泥 赋存状态 磁铁矿 嵌布特征 解离度 

分 类 号：TD91[矿业工程—选矿] X781[环境科学与工程—环境工程]