New Breakthrough! An Invention Patent of Yunnan Tin Co., Ltd.’s Tin Branch Has Been Authorized by the US Patent Office

According to the official WeChat account of Tin Corporation, recently, an invention patent for a tin-containing material smelting system, filed by the Tin Branch of Tin Corporation, was granted by the US Patent and Trademark Office, achieving a zero breakthrough for the Tin Branch in international patent grants. This marks a significant breakthrough in the company's core technologies in the field of tin smelting, positioning it competitively in the forefront of international intellectual property rights.

The patent technology was submitted for international PCT patent filing in March 2024 and was granted and announced by the US Patent and Trademark Office in May 2025. This is a landmark project in the "technological revolution" of tin smelting, representing a breakthrough from "zero to one". From the dry powder lance to the pressure-stabilizing system, every core device was independently developed through R&D. Over 30 core parameters of the injection process were explored and optimized, and six invention patents were filed, breaking through foreign technological barriers and achieving industrialisation of the technology. Self-produced fumes are recycled in a closed-loop system for refurnace smelting, with new progress made in optimizing the top-blown furnace process, achieving continuous and stable injection at 25 mt/h, a 2.5% reduction in fume rate, and a record high in crude tin production from the top-blown furnace. The coal consumption for comprehensive treatment of tin-containing materials decreased by 3.5%, saving nearly 2,000 mt of coal annually. Electricity consumption decreased by 4.09%, generating over 30 million yuan in annual benefits, truly realizing the goal of "writing papers in the workshop and leaving achievements on the production line."

The Tin Branch has always attached great importance to technological innovation, consistently placing patent protection for original technologies at a critical position. In recent years, it has actively filed over 100 domestic and international patents and obtained over 80 patents authorized by the state. Looking ahead, the Tin Branch will take this as an opportunity to continue upholding its original intention of innovation, forging ahead, breaking through technological bottlenecks, and setting new industry standards in the "uncharted territory" of tin smelting, achieving self-transcendence and injecting powerful momentum into the company's high-quality development with more internationally advanced scientific and technological achievements.