Blog
NEWS
China’s largest single-unit hydrogen alumina gas-phase suspension roasting furnace has been completed and put into operation.
2026-03-10
Recently, the 3,500 t/d gaseous suspension calcination furnace for aluminum hydroxide at China Aluminum Shanxi Huaxing Aluminum Co., Ltd. and Shanxi Xinfafa Chemical Co., Ltd. were successively commissioned and have reached full production while meeting all design specifications, marking a complete success for these projects. The 3,500 t/d gaseous suspension calcination furnace for aluminum hydroxide is the largest single-unit capacity such furnace currently in operation in China, newly developed and designed by the Shenyang Aluminum & Magnesium Design and Research Institute Co., Ltd. of Chinalco (hereinafter referred to as the Shenyang Institute). The engineering construction of both projects was undertaken by the Shenyang Institute under an EPC general contracting arrangement.
Aluminum hydroxide calcination is a critical step in the alumina production process. With the continuous expansion of alumina production capacity—individual production lines now achieve annual capacities of 1 million tonnes and the trend toward further increases persists—the existing calcination furnace technology can no longer meet the demands of such capacity growth. To address this challenge, the Shenyang Research Institute has established an R&D and engineering design team to develop a new generation of large-scale calcination furnaces, employing a range of modern technological approaches. First, extensive on-site data collection and testing are conducted on currently operating aluminum hydroxide calcination furnaces to obtain a wealth of first-hand operational data. Second, numerical simulation techniques are used to systematically investigate gas–solid two-phase flow, gas–solid separation, and heat transfer within the calcination furnace. Third, process parameters and system configurations are comprehensively optimized to fully leverage the processing capabilities of each individual piece of equipment. Fourth, three-dimensional design is employed throughout the engineering process to enable real-time clash detection, thereby ensuring design quality. After nearly two years of intensive effort, significant technological breakthroughs have been achieved, culminating in the development of China’s largest single-unit, 3,500 t/d, gas‑phase suspended‑bed aluminum hydroxide calcination furnace.
Compared with previous furnace designs, the 3,500 t/d calcination furnace not only boasts the largest single-unit capacity in China but also delivers significant advantages in key performance indicators such as capital investment per unit and system energy consumption. When benchmarked against the currently mainstream 1,300 t/d aluminum hydroxide calcination furnaces in China, the 3,500 t/d unit reduces land footprint per ton of alumina by 40%, cuts the weight of lining materials per ton of alumina by 25%, and lowers steel consumption per ton of alumina by 10%. Moreover, under stable operating conditions, its specific heat consumption can be kept below 2.8 MJ/t, representing a 5% reduction in heat consumption. After more than six months of production operation, this calcination furnace still holds potential for further capacity expansion.
Previous page:
Phone:
Email:
Address:
26F, PlCC Building, No. 24, Business Outer Ring Rd, Zhengdong
New District, Zhengzhou City, Henan Province, China
Copyright © Henan KEDANEU International Engineering Co.,Ltd.