In spite of the critical environmental impacts of mining and the associated geopolitical supply
risk, the strategic importance of rare metal tungsten is escalated by rapid expansions in …

Cobalt demand has witnessed tremendous growth in recent years due to its wide utilization
in many critical industries. However, more than half the world's demand for cobalt is supplied …

The scraped and end-of-life tungsten carbide materials demand innovative recycling
methods to recover valuable refractory and strategic metals like tungsten, cobalt, nickel etc …

Extraction and recovery of W and Mo from waste scraps hold significant importance for
sustainable resource utilization and environmental protection. Ultrasonic-assisted leaching …

Nitric acid pressure leaching process (NAPL) uses nitric acid as the leaching medium to
produce cobalt and nickel raw materials. Based on the benefits of nitric acid pressure …

Hard-metal sector, strategic for the industrial economies, is suffering from the reduced
availability and price volatility of its main feedstock: critical W and Co. In 2021, a 73.5 kt W …

This paper reviews the state-of-the-art recycling of tungsten from carbide (WC) scraps and
other spent alloys generated by various production and application industries. With an aim …

Aiming to treat scheelite concentrate for producing ammonium paratungstate efficiently and
cleanly, the conversion of scheelite to H 2 WO 4 and CaSO 4· nH 2 O in H 2 SO 4 solution …

The effective treatment of wastewater to mitigate environmental pollution remains a critical
concern in modern society. This review examines the synthesis methods, physicochemical …

The presence of iron impurity in feldspar lowers its commercial value due to imparting
unwanted colors to the final products. This study concerns the dissolution of iron from an …