| 高频红外碳硫仪测定重晶石和黄铁矿中的硫 |
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| 引用本文： | 黄启华,徐志强,杨玮玮.高频红外碳硫仪测定重晶石和黄铁矿中的硫[J].岩矿测试,2017,36(2):130-135. |
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| 作者姓名： | 黄启华 徐志强 杨玮玮 |
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| 作者单位： | 国家轻金属质量监督检验中心, 河南 郑州 450041,国家轻金属质量监督检验中心, 河南 郑州 450041,国家轻金属质量监督检验中心, 河南 郑州 450041 |
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| 基金项目： | 中国铝业股份有限公司技术标准项目（ZY2016GZC01） |
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| 摘 要： | 硫酸盐矿石和硫化物矿石大部分是低电磁性的物质,利用高频红外碳硫仪测定这类矿石中的硫时,在燃烧过程中难以产生较大的电磁感应涡流,导致矿石中的硫释放不完全,造成硫的测定结果偏低。本文采用二氧化硅将重晶石精矿和黄铁矿精矿稀释成不同硫含量的重晶石和黄铁矿样品,通过优化称样量及助熔剂等测试条件,建立了使用高频红外碳硫仪测定重晶石和黄铁矿中硫含量的分析方法。结果表明:当样品中的硫含量高于2%时确定称样量为0.07 g,当硫含量低于2%时确定称样量为0.1 g,加入助熔剂0.4 g锡粒+0.4 g铁粒+1.5 g钨粒,可使重晶石和黄铁矿中的硫完全释放进入仪器红外吸收区域,硫的回收率提高至95.8%~104.2%(重晶石)和95.3%~105.1%(黄铁矿),分别高于常规红外碳硫仪的回收率(83.39%~91.1%和91.5~97.5%)。本方法精密度高(RSD5%),实现了硫含量的准确测定。
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| 关 键 词： | 铝土矿 硫 过氧化钠碱熔 电感耦合等离子体发射光谱法 |
| 收稿时间： | 2017/2/4 0:00:00 |
| 修稿时间： | 2017/2/24 0:00:00 |
Determination of Sulfur in Barite and Pyrite by High Frequency Infrared Carbon-Sulfur Spectrometer |
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| HUANG Qi-hu,XU Zhi-qiang and YANG Wei-wei.Determination of Sulfur in Barite and Pyrite by High Frequency Infrared Carbon-Sulfur Spectrometer[J].Rock and Mineral Analysis,2017,36(2):130-135. |
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| Authors: | HUANG Qi-hu XU Zhi-qiang and YANG Wei-wei |
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| Institution: | China National Quality Supervision and Inspection Center for Light Metal, Zhengzhou 450041, China,China National Quality Supervision and Inspection Center for Light Metal, Zhengzhou 450041, China and China National Quality Supervision and Inspection Center for Light Metal, Zhengzhou 450041, China |
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| Abstract: | Most sulfate and sulfide ores are composed of low electrical magnetic materials. In the process of combustion, the sulfur in sulfate and sulfide ores cannot be released completely, because it is difficult to produce a large enough electromagnetic induction eddy current. Thus, the results are lower than real values when the sulfur in sulfate and sulfide ores is determined by High Frequency Infrared Carbon-Sulfur Spectrometer. In this study, the barite and pyrite samples are diluted with silicon dioxide to acquire different contents of sulfur. By optimizing the sample weight and flux types, determination of sulfur by High Frequency Infrared Carbon-Sulfur Spectrometer was developed. Results show that the sample weight is 0.07 g when the content of sulfur is higher than 2% whereas sample weight is 0.1 g when the sulfur content is below 2%. Furthermore, the sulfur in barite and pyrite can be released completely into the infrared absorption area when adding 0.4 g of tin grain, 0.4 g of iron grain, and 0.5 g of tungsten grain to the sample. The recovery of sulfur can reach 95.8%-104.2%(barite) and 95.3%-105.1%(pyrite), which is far higher than the recovery of 83.3%-91.1% and 91.5-97.5% for the conventional analysis of sulfur by Infrared Carbon-Sulfur Spectrometer. This method precision is less than 5% and can determine the accurate content of sulfur. |
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| Keywords: | bauxite sulfur sodium peroxide fusion Inductively Coupled Plasma-Optical Emission Spectrometry |
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