High-purity selenium is important for technological innovation in fields such as aerospace, military, new energy, and semiconductors, and has become a hot topic in developed countries. Unfortunately, traditional preparation of high-purity selenium faces challenges such as high cost, environmental pollution, and low efficiency. In this study, we introduce an innovative green method that efficiently extracts selenium from crude selenium by combining melt filtration and vacuum distillation. Our approach effectively addresses these challenges. We calculated the potential reactions of the impurities in the selenium melt and analyzed the saturated vapor pressures of various substances. The experimental results showed that volatile impurities such as PbSe and PbTe were largely removed in the form of filter residues during the melt filtration of crude selenium residue at 653 K. The filtered selenium melt was distilled for 120 min at 533 K to obtain refined Se with a total purity of 99.9 %. Through the melt filtration-vacuum distillation process, the removal rates of impurity elements Cu, Pb, As, and Te were 99.35 %, 99.97 %, 99.83 %, and 81.11 %, respectively. Impurity elements were enriched and recovered from the filter and distillation residues. The refined Se was efficiently recovered from crude selenium, and the economic benefits were superior to other processes. This process meets the demands of a clean and efficient selenium metallurgy industry.

中文翻译：

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一种创新的绿色方法，通过熔融过滤-真空蒸馏高效提取硒


高纯硒对航空航天、军事、新能源、半导体等领域的技术创新具有重要意义，已成为发达国家的热门话题。遗憾的是，传统的高纯硒制备面临着成本高、环境污染和效率低等挑战。在这项研究中，我们介绍了一种创新的绿色方法，该方法通过结合熔融过滤和真空蒸馏从粗硒中有效地提取硒。我们的方法有效地解决了这些挑战。我们计算了硒熔体中杂质的潜在反应，并分析了各种物质的饱和蒸气压。实验结果表明，在 653 K 下对粗硒渣进行熔融过滤时，PbSe 和 PbTe 等挥发性杂质以滤渣的形式基本被去除。过滤后的硒熔体在 533 K 下蒸馏 120 分钟，得到总纯度为 99.9% 的精制硒。通过熔融过滤-真空蒸馏工艺，杂质元素 Cu、Pb、As 和 Te 的去除率分别为 99.35 %、99.97 %、99.83 % 和 81.11 %。从过滤器和蒸馏残留物中富集并回收杂质元素。精制的硒从粗硒中高效回收，经济效益优于其他工艺。该工艺满足了清洁高效的硒冶金行业的要求。