Recently, Chinalco's two invention patents, "Preparation Process of Low-Fe 4N Gallium" and "An Energy-Saving High-Voltage Frequency Converter Cooling System", were authorized by the State Intellectual Property Office.

"Preparation process of low-iron 4N gallium", adding the gallium-containing solution into the electrolytic cell, electrolyzing the gallium-containing solution at a suitable current density for several hours, taking out the high-iron metal gallium precipitated in the electrolytic cell, and obtaining the low-iron metal gallium preparation solution; The low-iron metal gallium is electrolyzed at an appropriate current density to prepare a solution, and the low-iron crystalline gallium is obtained through crystallization. The invention can reduce the content of iron in 4N gallium products, ensure that 4N gallium products meet the quality standards for preparing high-purity gallium, and improve the output rate of high-purity gallium.

"An energy-saving high-voltage frequency converter cooling system" consists of a water supply system, a filter, a high-voltage frequency converter room, a cooling tower replenishment pool and a water storage tank. A surface cooler is installed on the outside of the high-voltage frequency converter, and an exhaust fan is built in the top; the water supply system is connected to the water inlet pipe of the surface cooler through a water supply pipe, and a filter is installed on the pipe between the water supply system and the surface cooler. The water outlet pipe of cooling towers are connected with the water supply pool of the cooling tower through the water outlet main pipe, and the water storage tank is connected with the water outlet main pipe through the water storage branch pipe. The invention has the characteristics of low reconstruction cost and obvious power saving effect.

In recent years, Chalco Mining has strengthened the construction of the intellectual property system, strengthened patent knowledge training, improved the patent incentive mechanism, deeply explored technological innovation points, and increased the protection of patented technology. The quality of patent applications and the rate of invention patent authorization have steadily improved. Up to now, the company has 150 valid authorized patents, including 33 invention patents and 117 utility model patents.