The GB4-2 model, with a 2kg capacity, is specifically engineered for processing gold, silver, copper, iron, and various alloys. It features a 6.67×10⁻³Pa ultra-high vacuum environment, combined with vacuum secondary feeding and electromagnetic stirring technology, effectively addressing oxidation and compositional segregation issues. Equipped with Siemens PLC intelligent control for user-friendly operation and six-tier safety safeguards, this system is the ideal choice for universities, research institutes, and high-end manufacturing applications.