对硫酸钡砂的硫酸钡含量、表观密度及其120kV电压下铅当量的研究

Study on barium sulphate content, apparent density and lead equivalent at 120kV voltage of barium sulphate sand

选取15组硫酸钡砂样品,参照GB/T 2899-2017《工业沉淀硫酸钡》对硫酸钡含量进行检测,依据JGJ 52-2006《普通混凝土用砂、石质量及检验方法标准》对表观密度进行检测,依据YY/T 0292.1-2020《医用诊断X射线辐射防护器具第1部分:材料衰减性能的测定》对铅当量进行检测。结果显示,一般情况下,表观密度越大,硫酸钡含量越高,但由于硫酸钡砂存在杂质,当杂质表观密度比硫酸钡大时,硫酸钡含量并非总随表观密度增加而增加;对铅当量有直接影响的是硫酸钡含量,硫酸钡含量越高则铅当量越大。

In this paper, 15 groups of barium sulphate sand samples are selected. The content of barium sulphate is detected according to GB/T 2899-2017 "Barium Sulphate precipitated for industrial use", the apparent density is tested according to JGJ 52-2006 “Standard for technical requirements and test method of sand and crushed stone(or gravel)for ordinary concrete”, and the lead equivalent is tested according to YY/T 0292.1-2020 “Protective devices against diagnostic medical X-radiation-Part 1: Determination of attenuation properties of materials”. The results show that in general, the higher the apparent density, the higher the barium sulphate content. However, when the apparent density of impurities in barium sulphate sand is larger than that of pure barium sulphate, the barium sulphate content does not always increase with the apparent density. The barium sulphate content has a direct effect on the lead equivalent, and the higher the barium sulphate content, the greater the lead equivalent.