As golden autumn embraced Nanning, the global alumina industry turned its attention to the grand opening of the 43rd ICSOBA International Conference on October 26, 2025. As a highly authoritative and high-end event in the international alumina sector, this conference gathered top global enterprises, academicians, experts, and industry leaders to explore solutions for the industry’s green transformation under the "dual carbon" goal. Henan Jiuye Chemical Equipment Co., Ltd. (hereinafter referred to as "Jiuye Chemical") was invited to attend, and its chairman, as a special guest speaker, delivered a keynote speech titled *Practice and Exploration of Energy-Saving New Technologies in the Evaporation Section of Green Alumina Production*. With a series of independent technological innovations and practical achievements, Jiuye Chemical emerged as the "Chinese force" drawing global attention at the conference.  

 Global Gathering at a Prestigious Event: Why is ICSOBA the Industry "Bellwether"?  

The ICSOBA International Conference serves as a core exchange platform for the global alumina and aluminum raw material sector. Each session attracts leading enterprises (such as Chinalco, Rusal, and Rio Tinto), research institutions, and industry experts from major aluminum-producing countries including China, Russia, Australia, and Guinea. Its topics focus on cutting-edge industry technologies, low-carbon transformation paths, and global market trends. The technological achievements and practical cases released at the conference directly influence the development direction of the global alumina industry, earning it the reputation of being an industry "bellwether" and "top think tank".  

Jiuye Chemical’s invitation to attend and deliver a keynote speech not only reflects the international industry’s recognition of its technological strength but also marks that China’s alumina evaporation section technology has ranked among the world’s leading standards, capable of providing solutions for the global industry.  

Solid Strength Endorsement: 26 Years of Cultivation – Why Can Jiuye "Stand on the International Stage"?  

Jiuye Chemical’s ability to speak at a high-end platform like ICSOBA stems from its 26 years of unremitting technological cultivation and industry experience:  

1. Strong Qualifications: An Industry-Recognized "Technological Benchmark"  

- Founded in 1999, it is a **national high-tech enterprise integrating "scientific research + design + manufacturing + installation + services", and a Henan Provincial "Specialized, Refined, Differential, Innovative" Little Giant Enterprise;  

- Its core product, the "energy-saving seven-effect two-stage falling film evaporator", boasts world-leading technology and won the "Second Prize for Scientific and Technological Progress from the China Non-Ferrous Metals Industry Association" in 2013;  

- It has accumulated 37 patents related to evaporators, with core technologies protected by independent intellectual property rights (e.g., Patent No. ZL201220432718.4 for the seven-effect evaporator and Patent No. ZL201821142093.1 for the evaporative condenser).  

 2. Impressive Cases: A "Quality Track Record" of Global Projects  

From domestic leading enterprises to overseas key projects, Jiuye Chemical’s evaporator equipment has served over 30 large-scale domestic and international alumina projects, repeatedly setting industry records:  

- Domestic projects: The evaporation system of Chinalco Guangxi Huasheng’s 2 million-ton alumina project was awarded the "Non-Ferrous Metals Industry High-Quality Project"; the 580 t/h seven-effect evaporator for Guangxi Tiandong Jinxin Chemical is the world’s largest evaporator unit in the alumina industry;  

- Overseas projects: Rusal Kenya 220 t/h project, Jiuquan Iron and Steel Jamaica 300 t/h project, Jinjiang Group Indonesia 500 t/h project... Its products are sold globally and have won praise from international customers.  

 A Breakthrough Moment in Technology: Three Core Innovations "Highlight" Carbon Reduction for the Global Alumina Industry  

In his speech, the chairman of Jiuye Chemical focused on three disruptive technologies for the evaporation section, demonstrating the value of Chinese technology to the industry through real data and practical cases:  

1. Seven-Effect Segmented Evaporator: Reduces Alumina Cost by 50 Yuan per Ton, Cuts Carbon Emissions by 6.31 Million Tons Annually  

As Jiuye’s "flagship technology", the seven-effect evaporator adopts three patented designs – "split structure + new film distributor + cyclone demister" – to solve the pain points of uneven liquid film and low demisting efficiency in traditional equipment:  

- Evaporation efficiency is increased by over 10%, and the steam-water ratio is reduced from 0.3 to below 0.17;  

- Based on China’s annual alumina output of approximately 80 million tons, it reduces annual steam consumption by 24 million tons, cuts industry production costs by **40 billion yuan**, and reduces carbon emissions by 6.31 million tons (equivalent to the annual carbon sequestration of 1.85 million hectares of forests).  

2. Evaporative Condenser: Saves 11.22 Million Yuan Annually, Further Reduces Alumina Cost by 4.68 Yuan per Ton  

For the first time, it integrates "exhaust steam condensation + circulating water cooling" into one unit, delivering outstanding results in the Phase II project of Chinalco Guangxi Huasheng:  

- Compared with traditional atmospheric condensers, it saves 43% of circulating water, reduces annual operating costs by 9.14 million yuan, and cuts one-time investment by 2.081 million yuan;  

- If promoted industry-wide, it can save 720 million kWh of electricity annually and reduce carbon emissions by 484,000 tons.  

 3. Eight-Effect Evaporator: A New Option for Low-Concentration Mother Liquor, with an Investment Payback Period of Less Than 7 Months  

Optimized for low-concentration mother liquor (caustic alkali ≤ 215 g/L), it features innovations in heat balance calculation and temperature difference distribution:  

- For an alumina plant with an annual output of 1.2 million tons, it saves over 27 million yuan in annual steam costs (based on a steam price of 180 yuan/ton); in regions with high steam prices such as Guinea, annual savings can reach 45 million yuan;  

- Although it requires an additional investment of 25 million yuan compared with the seven-effect evaporator, its **investment payback period is as short as 7 months**, and the core technology is protected by a patent (Patent No. ZL201320620522.2).  

Forward-Looking Exploration: Breaking Through MVR Technology to Solve Industry "Long-Standing Problems"  

In addition to mature multi-effect evaporation technology, Jiuye Chemical also shared its exploration of applying MVR (Mechanical Vapor Recompression) evaporators in the alumina industry:  

- It has overcome the traditional limitations of "insufficient compression ratio and low evaporation capacity"; in the 40 t/h transformation project for Luoyang Zhongchao New Materials, compared with the seven-effect evaporator, it **saves 357.6 yuan in operating costs per hour, equivalent to 3 million yuan annually;  

- Tailored to the characteristics of sodium aluminate solution, it has developed a "single-effect, multi-body, multi-unit" MVR evaporator, solving industry pain points such as high boiling point elevation and easy scaling, and providing a new option for small-batch, high-value alumina production.  

 Conclusion: Low Carbon is Not a Cost, But Competitiveness  

"Low carbon is not a cost, but competitiveness; innovation is not an option, but a survival rule." This is the core viewpoint conveyed by Jiuye Chemical in its speech. From seven-effect to eight-effect evaporators, from condensers to MVR technology, Jiuye Chemical, with 26 years of technological accumulation, has not only provided a "feasible path" for carbon reduction in China’s alumina industry but also demonstrated the strength of Chinese equipment manufacturing to the world through the international platform of ICSOBA.  

In the future, Jiuye Chemical will continue to take technological innovation as its driving force and work hand in hand with global industry peers to jointly draw a blueprint for the green and high-quality development of the alumina industry.