Tungsten‑rhenium wire is used in thermocouple and lamp filament manufacturing due to its good thermal sensitivity and high temperature plasticity, and many waste wires are generated in processing and after use. This work focuses on the efficient recovery of high value rhenium from tungsten‑rhenium wire waste with a mass composition represented by W95Re5. The main steps for recovery include alkali fusion, recrystallization, hydrogen reducing and washing. First, WRe wire was decomposed by KOH-K₂CO₃ molten salt to produce potassium perrhenate, where the decomposition ratios of W and Re reached 99.36% and 99.80% using a mass ratio of salt to wire of 3:1, m(KOH) of 80% (m representing the mass fraction of KOH in binary salt), a temperature of 800 °C and a reaction time of 60 min. Then, the decomposed product was leached by water, and from the resulting lixivium high purity KReO₄ crystals were obtained by segregation, which had a perfect rhombic dipyramid morphology and average size of 73.26 μm. Last, the material was reduced to Re powder at 350 °C with a H₂ flow rate of 10 L/min. Re powder, with a purity of higher than 99.5% and fine grain size of 19.37 μm, was obtained after washing with acid and water. This method provided a potential economic process for the recovery of waste WRe wire.

钨‑丝具有良好的热敏性和高温可塑性，可用于热电偶和灯丝制造，在加工过程中和使用后会产生许多废丝。这项工作的重点是从具有W95Re5代表的质量组成的钨hen丝废料中有效回收高价值的en。回收的主要步骤包括碱熔，重结晶，氢还原和洗涤。首先，用KOH-K ₂ CO ₃熔融盐将W Re丝分解成高per酸钾，使用盐与丝的质量比为3：1，m，W和Re的分解率分别达到99.36％和99.80％（ KOH）为80％（m代表KOH在二元盐中的质量分数），温度为800°C，反应时间为60分钟。然后，将分解的产物用水浸出，并通过分离得到from状高纯度的KReO ₄晶体，其具有完美的菱形双金字塔形形态并且平均尺寸为73.26μm。最后，将材料在350°C下以10 L / min的H ₂流速还原成Re粉末。用酸和水洗涤后，获得纯度高于99.5％且细粒度为19.37μm的Re粉末。该方法为回收废钨丝提供了潜在的经济过程。