Kazakhmys, a leading player in the mining and metallurgy sector, has announced a significant development in its operations with the signing of an agreement with a consortium from the China National Chemical Engineering Company (CNCEC) to construct a new sulfuric acid plant at its Zhezkazgan copper smelter in Kazakhstan. The engineering, procurement, and construction (EPC) contract is valued at approximately $213.76 million, marking a substantial investment in the modernization of the facility.
The decision to build the new sulfuric acid plant is part of a broader initiative aimed at modernizing the Zhezkazgan copper smelter and aligning it with contemporary environmental standards. The existing metallurgical gas utilization infrastructure, which dates back to the 1970s, is in dire need of technological upgrades. The project will not only involve the construction of the new production facility but also the modernization of the process gas capture and purification system, which will include the installation of advanced equipment such as converter enclosures, cooling towers, and electrostatic precipitators.
One of the key goals of this project is to enhance the efficiency of gas capture, with expectations that the new system will achieve a capture rate of 99%. Furthermore, the residual sulfur dioxide concentration in the treated gases will meet the stringent requirements outlined in the international Best Available Techniques Reference Documents (BREF), significantly reducing SO₂ emissions and the overall environmental impact of the Zhezkazgan smelter.
The new sulfuric acid plant is designed to have a production capacity of 350,000 tons per year and will be capable of processing up to 300,000 normal cubic meters of process gases per hour. The commissioning of the plant is tentatively scheduled for 2028, with full-scale mobilization and preparatory work expected to commence by the end of 2026. The construction and installation phase is projected to take around 29 months.
This initiative is a crucial part of Kazakhmys’ long-term modernization program for the Zhezkazgan copper smelter, aimed at improving the reliability of the gas purification system and ensuring compliance with modern environmental regulations. Kazakhmys Group, known for its vertically integrated operations in mining and non-ferrous metallurgy, ranks among the top producers globally, holding the 20th position in copper-in-concentrate production and 12th in blister and cathode copper production, according to the company’s website.
