en.Wedoany.com Reported - China Aluminum International Engineering Corporation Ltd. (hereinafter referred to as "Chalieco," stock codes: 601068.SH/HK2068) has integrated its proprietary core environmental technologies and a full-chain ecological management system throughout the entire lifecycle of the 1 million tons/year Mempawah Alumina Project in Mempawah Regency, West Kalimantan Province, Indonesia. The project employs large-scale gas suspension calcination furnace energy-saving and pollution-reduction technologies, optimizing flue gas closed-loop circulation and upgrading waste heat recovery systems to reduce fuel consumption and pollutant emissions, while also incorporating standardized waste gas treatment and dust collection systems. As Indonesia's first state-owned alumina project and a national strategic initiative, it is jointly invested by PT Indonesia Asahan Aluminium (Inalum) and PT Aneka Tambang (Antam), and constructed by Chalieco under an EPC general contracting model.
Chalieco is a leading non-ferrous metal engineering technology service enterprise in China, headquartered in Beijing. It is a subsidiary of the Aluminum Corporation of China (Chinalco) and was listed on the Shanghai Stock Exchange in 2018. Its business covers the full industrial chain, including engineering design, construction contracting, equipment manufacturing, and operation and maintenance. Since entering the Indonesian market in 2014, the company has been deeply engaged in the local non-ferrous metals sector for over a decade. The Mempawah project commenced production in December 2024, with a single production line capable of producing 1 million tons of metallurgical-grade alumina annually. It adopts Chalieco's advanced technologies such as low-temperature digestion, high-efficiency sedimentation, two-stage decomposition, seven-effect evaporation, and large-scale hydrate calcination furnaces, featuring compact layout, minimal land use, ultra-low energy consumption, and environmental friendliness.
The large-scale gas suspension calcination furnace is the core equipment for alumina production. Based on local Indonesian needs, Shenyang Aluminum and Magnesium Engineering and Research Institute Co., Ltd., a subsidiary of Chalieco, adopted a single-line large-scale production line design, reducing the floor area by 475 square meters, decreasing steel usage, and saving approximately 3.5 million yuan in investment. Utilizing low-temperature calcination technology, the unit heat consumption is as low as 2.75 GJ, saving 5,800 tons of standard coal annually and reducing carbon dioxide emissions by 9,500 tons, with nitrogen oxide and dust emissions far below international standards. This technology has been certified by the China Nonferrous Metals Industry Association as reaching an internationally advanced level.
During project execution, Chalieco established a full-process environmental control mechanism, integrating China's green mining standards with Indonesian local regulations, building a routine monitoring and hazard identification system, and comprehensively promoting measures such as water resource recycling, waste heat recovery, and solid waste resource utilization. It also conducted environmental science popularization activities with local governments and communities. This project represents a successful practice of exporting China's core aluminum industry equipment overseas, contributing to the synergistic development of Indonesia's alumina industry upgrading and ecological protection.
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