At a crucial juncture where the global aluminum industry is accelerating its transformation towards green and low-carbon development, the 12th Aluminum Industry Science and Technology Conference has become a "battleground" for technological innovation. Henan Jiuye Chemical Equipment Co., Ltd. made a stunning appearance with its globally pioneering eighth-effect evaporator, rewriting the industry's energy-saving narrative with its breakthrough technology and attracting the high attention of global aluminum industry giants.

Ju Lirang, the Chairman and Senior Engineer, pointed out in the report titled "Practice and Exploration of New Energy-saving Technologies in the Evaporation Section of Green Alumina Production" that the current alumina industry is facing two core pain points: high energy costs and low efficiency in mother liquor treatment. Traditional evaporators have problems such as the decline in thermal efficiency and the intensification of equipment wear under low-concentration working conditions. However, through two major core technological breakthroughs, namely the optimization of temperature difference distribution and precise heat balance calculation, the eighth-effect evaporator developed by Jiuye has innovatively raised the evaporation efficiency of low-concentration mother liquor to a new height in the industry. Technical data shows that under low-concentration working conditions of 30g/L-50g/L, the eighth-effect evaporator can still maintain the same temperature difference as that of the seventh-effect evaporator under high-concentration working conditions of 80g/L-100g/L, and the operational stability of the equipment has been increased by 40%, completely breaking through the industry's technical bottleneck.

This technological revolution is not only reflected in the breakthrough of performance but also amazes the industry with the cost reduction data in real terms. The thermal balance calculation shows that the steam-water ratio of the eighth-effect evaporator group drops directly by 0.03 compared with that of the seventh-effect evaporator group. Taking an alumina plant with an annual output of 1.2 million tons as an example, it can save 150,000 tons of steam every year. Calculated at the domestic steam price of 180 yuan per ton, the annual cost savings reach 27 million yuan. In regions such as Europe and North America where the steam price exceeds 300 yuan per ton, the annual cost savings soar to 45 million yuan. It is worth mentioning that through the optimization of modular design and intelligent control system, the Jiuye team has shortened the renovation cycle of the eighth-effect evaporator to 60% of the industry's average level, greatly reducing the production suspension losses of enterprises.

In the face of industry concerns about high investment, Ju Lirang emphasized at the meeting, "Although the transformation investment of the eighth-effect evaporator is approximately 25 million yuan more than that of the seventh-effect evaporator, with the protection of 15 national patented technologies and the extension of equipment lifespan through the intelligent operation and maintenance system, the payback period is less than seven months." This data indicates that within half a year after the equipment transformation, enterprises can achieve pure profit growth, truly realizing a win-win situation between technological upgrading and economic benefits.

Currently, the market price of alumina continues to be under pressure, and the average profit margin of the industry has dropped below 5%. The advent of the eighth-effect evaporator of Henan Jiuye Chemical Equipment Co., Ltd. not only provides enterprises with a "life-saving straw" for cost reduction and efficiency improvement but also promotes the industry's progress towards the "carbon neutrality" goal with its zero-emission design and waste heat recovery technology. Experts from the International Aluminum Institute (IAI) commented, "The global debut of the eighth-effect evaporator of Jiuye is likely to be the most disruptive technological breakthrough in the aluminum industry in the past decade, and its far-reaching impact on the industrial chain is worthy of global anticipation."

From the laboratory to industrialization, Jiuye has completed technological iteration in five years. Now, with technology as its vessel, it is leading the global aluminum industry into a new era of green intelligent manufacturing. This technological revolution, which began with the evaporator, will eventually trigger an efficiency revolution across the entire industry and reshape the competitive landscape of the global aluminum industry.