The core of tungsten metal extraction is to extract tungsten compounds (such as tungstic acid and ammonium paratungstate (APT)) from tungsten ores (mainly scheelite (Fe, Mn) WO ₄ and scheelite CaWO ₄), and then reduce them to obtain metallic tungsten (with a purity of over 99.9%). The process is divided into three stages: mineral decomposition, purification, and metal reduction. Due to the low grade and high impurities of tungsten ores, the purification stage is particularly critical.

Nonferrous metals play a core role in resource recycling and ecological protection systems - they are not only non renewable strategic resources, but also key carriers for promoting the implementation of circular economy and reducing ecological load. Their recycling and reuse are directly related to resource security, carbon emission control, and ecological pollution control

The core goal of non-ferrous metal refining is to remove impurities (such as sulfur, iron, silicon, heavy metals, etc.) from raw materials, purify metals to industrial grade, battery grade, or electronic grade standards. The refining process for different metals varies depending on their characteristics, but can be divided into three core types: pyrometallurgical refining, hydrometallurgical refining, and electrolytic refining. Some scenarios may also combine special processes such as vacuum refining and regional melting.

The current non-ferrous metal recycling industry is in a critical growth period of "policy driven+technological breakthroughs+demand explosion". The global and domestic market continues to expand, with outstanding highlights in segmented fields. Although facing some challenges, the overall prospects are very broad