新疆某铁矿冶炼企业天然放射性水平调查与评价  

Investigation and Evaluation on Natural Radioactivity Level of an Iron Ore Smelting Enterprise in Xinjiang

作　　者：胡有华 HU Youhua(Xinjiang Radiation Environmental Supervising Station,Urumqi Xinjiang 830000,China)

机构地区：[1]新疆辐射环境监督站,新疆乌鲁木齐830000

出　　处：《新疆环境保护》2021年第3期39-43,共5页Environmental Protection of Xinjiang

基　　金：环境保护部核与辐射安全(新疆)项目(JD201638)。

摘　　要：为了解新疆某铁矿冶炼企业的铁矿石、冶炼初级产品及冶炼尾矿中的放射性水平状况,对尾矿渣的资源化利用所致辐射影响进行分析。通过对该企业进行现场监测与取样,并对采集样本进行天然放射性核素含量分析,评估冶炼尾矿资源化利用的可行性。结果表明:铁矿冶炼企业污染源项表面1 m处的γ辐射剂量率的测量值范围处于新疆天然贯穿辐射所致空气吸收剂量率(室外)的波动范围之内。样品中放射性核素含量低于国家标准中天然放射性核素免管限值。在没有掺杂的情况下,尾矿废物进行资源化利用时,部分尾矿砂可以作为A类装饰装修材料,其生产、销售及使用不加限制,一小部分尾矿砂只能作为B类装饰装修材料及建筑的外饰面使用。在资源化利用过程中,当地生态环境部门应加强对企业的辐射环境安全监管工作。In order to understand the radioactive level of iron ore,primary smelting products and smelting tailings of an iron ore smelting enterprise in Xinjiang,the radiation effect caused by the resource utilization of tailings slag was analyzed.The feasibility of resource utilization of smelting tailings was evaluated based on on-site monitoring and sampling of the enterprise and analysis of natural radionuclide content of the collected samples.The results showed that the measured value range of gamma radiation dose rate at 1 m from the surface of pollution source term of iron ore smelting enterprises was within the fluctuation range of air absorbed dose rate(outdoor)caused by natural penetrating radiation in Xinjiang.The content of radionuclide in the sample was lower than the national standard for natural radionuclide.In the case of no doping,some tailings could be used as class A decoration materials when tailings waste was utilized as resources,and its production,sales and use could be not restricted.A small part of tailings could only be used as class B decoration materials and exterior decoration of buildings.In the process of resource utilization,the local ecological environment department should strengthen the radiation environmental safety supervision of enterprises.

关 键 词：铁矿冶炼 天然放射性 资源化利用 吸收剂量率 

分 类 号：X837[环境科学与工程—环境工程]