进出口金属硅、碳化硅、硅铁、硅渣归类化验关键点分析  

Analysis of Key Points in Classification Tests of Imported and Exported Metal Silicon,Silicon Carbide,Ferrosilicon and Silicon Slag

作　　者：王海仙 闫婧 杨丽飞 邱越 郝红叶 WANG Hai-Xian;YAN Jing;YANG Li-Fei;QIU Yue;HAO Hong-Ye(Chemicals,Minerals and Metallic Materials Inspection Center of Tianjin Customs,Tianjin 300456;Tianjin Customs,Tianjin 300452)

机构地区：[1]天津海关化矿金属材料检测中心,天津300456 [2]天津海关,天津300452

出　　处：《中国口岸科学技术》2022年第7期34-38,共5页China Port Science and Technology

基　　金：天津海关科研计划(2021THK001)。

摘　　要：本文根据《中华人民共和国进出口税则(2022)》规定和行业通则,分析金属硅、碳化硅、硅铁和硅渣的商品知识和归类化验方法。金属硅、碳化硅、硅铁的元素含量和成分不同,可通过X射线荧光光谱和X射线衍射加以区分。硅渣的元素组成较复杂,铝、钙等杂质含量高,物相一般由硅、碳化硅、二氧化硅、硅铁和硅铝酸盐等物质的两种或多种成分构成,微区元素的分布与赋存状态不同。扫描电镜X射线能谱显示,硅渣样品中包括硅、硅铁、碳化硅、二氧化硅、硅渣等多种形式。According to the Import and Export Tariff Schedule 2022 and the general rules of the industry,this study focuses on the analysis of commodity knowledge and the methods of classification tests for metal silicon,silicon carbide,ferrosilicon and silicon slag.The element content and composition of silicon metal,silicon carbide and ferrosilicon are different,which can be distinguished by X-ray fluorescence spectrometry and X-ray diffraction(XRD).The element composition of silicon slag is complex,which contains high content of impurities such as aluminum and calcium.XRD shows that it is generally composed of two or more components such as silicon,silicon carbide,silicon dioxide,ferrosilicon and aluminosilicate.In addition,the distribution and occurrence state of micro elements are different.The silicon slag samples includes various forms such as silicon,ferrosilicon,silicon carbide,silicon dioxide and silicon slag by the energy spectrum-scanning electron microscope.

关 键 词：金属硅 碳化硅 硅铁 硅渣 归类化验 

分 类 号：TQ127.2[化学工程—无机化工]