聚氨酯泡沫塑料吸附-火焰原子吸收光谱法测定铜选矿流程样品中金

发布时间：2018-06-23 15:38

  本文选题：聚氨酯泡沫塑料 + 金　； 参考：《冶金分析》2017年03期

【摘要】：在稍开马弗炉炉门的条件下焙烧样品后,采用盐酸、硝酸-氯酸钾溶样,用约0.2g经10%(体积分数,下同)盐酸浸泡24h后的聚氨酯泡沫塑料(简称泡塑)吸附样品中金,以自来水冲洗干净泡塑以去除吸附矿浆,然后直接用王水-高氯酸对泡塑进行消解,建立了泡塑吸附-火焰原子吸收光谱法(FAAS)测定铜选矿流程中金的分析方法。实验表明:高碳、高硫样品在稍开马弗炉炉门的条件下,650℃焙烧3.5h可以将碳处理干净;用0.2g经10%盐酸浸泡24h后的泡塑可将4.0mg金吸附完全;泡塑震荡吸附120min基本可以消除矿浆对吸附率的影响。在选定的实验条件下,金在0.20~1.0μg/mL质量浓度范围内与其对应的吸光度线性良好,相关系数为0.999 8,方法检出限为0.024μg/g。采用实验方法对铜选矿流程中铜原矿、铜精矿、铜尾矿中金进行测定,测定结果与标准方法 GB/T 3884.2—2012或GB/T 20899—2007均较为一致,相对标准偏差(RSD,n=11)不大于10%。
[Abstract]:After roasting the samples under the condition of a slightly opened muffle furnace door, the samples were dissolved with hydrochloric acid, nitric acid and potassium chlorate, and the samples were soaked in 10% hydrochloric acid for 24 hours with about 0.2g (volume fraction) of hydrochloric acid to adsorb gold in the samples. A method for the determination of gold in copper mineral processing process was established by using Wang Shui perchloric acid as a direct method for the determination of gold in copper processing process. The foam plastic was washed with tap water to remove the adsorbed pulp, and then the foam plastic was digested directly by Wang Shui perchloric acid. The method was developed for the determination of gold in copper mineral processing process by flame atomic absorption spectrometry (Faas). The results show that the samples with high carbon and high sulfur can be treated clean at 650 鈩，

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