Abstract

The level of optimization of the technological process based on fluoride redistribution in tungsten technology allows starting production of dense crucibles with a diameter of 700–1000 mm and height of 800–1100 mm with any wall thickness. The technology provides fluorination with further restoration of hydrogen-synthesized WF₆ on the surface of copper substrate and the use of evolved HF for obtaining fluoride and hydrogen. Circulation of the used reagents provides observance of ecological standards. The proposed “closed” circuit of the apparatus, consuming tungsten powder or metal waste, provides performance on finished products of 93–127 t/year and can be replicated. Expenses on the creation of one production circuit for manufacturing tungsten crucibles by the described technology are paid off within 2 months of operation. Inclusion of rectification cleaning of WF₆ into the technological circuit allows obtaining tungsten products of high purity. The new technology guarantees crucible production of a strictly set shape with high purity of the inner surfaces from dense tungsten with increased physical-mechanical properties and low degradation of properties during operation, which allows using crucibles with less wall thickness.

中文翻译：

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使用环境友好的氟化物过渡和试剂回路从多孔钨中获得特别大尺寸的坩埚

摘要

钨技术中基于氟化物再分布的工艺优化水平允许开始生产直径为 700-1000 毫米、高度为 800-1100 毫米、任何壁厚的致密坩埚。该技术提供氟化，进一步恢复氢合成的 WF ₆在铜基板表面上，并使用放出的 HF 获得氟化物和氢。使用过的试剂的循环提供了对生态标准的遵守。该设备的拟议“闭合”回路消耗钨粉或金属废料，可提供 93-127 吨/年的成品性能，并且可以复制。通过所述技术创建一个用于制造钨坩埚的生产电路的费用在运行后的 2 个月内付清。包含 WF ₆的整流清洗进入技术电路可以获得高纯度的钨产品。新技术保证坩埚生产严格设定的形状，内表面纯度高，具有更高的物理机械性能和操作过程中的低性能退化，允许使用壁厚更小的坩埚。