At the 12th China Aluminum Industry Science and Technology Development Conference, Mr. Ju from Jiuye Chemical brought earth - shattering news—the debut of the world's first patented technology for a new type of eight - effect evaporator! It's worth noting that from the introduction and promotion of the seven - effect evaporator patented technology ten years ago to the advent of the eight - effect evaporator today, after a decade of painstaking efforts, Jiuye Chemical is once again challenging the industry with technological innovation. In the current environment of low alumina prices and soaring production costs for enterprises, what makes this new technology exceptional? And where does its practical applicability lie? Let's explore these questions in detail.

 Precise Positioning: The Ideal "Terrain" for the Eight - Effect Evaporator

In alumina production, evaporators can be categorized into low - concentration and high - concentration types. Low - concentration evaporators handle mother liquor with a concentration of 200 grams or less, while high - concentration evaporators are designed for conditions where the mother liquor concentration exceeds 240 grams. The eight - effect evaporator newly introduced by Jiuye Chemical precisely targets the low - concentration evaporator segment. The reason behind the recommendation against promoting high - concentration eight - effect evaporators is based on rigorous scientific considerations. As the solution concentration increases, the boiling point rises significantly. This elevation in boiling point consumes the effective temperature difference, reducing the temperature difference between the effects of the evaporator and affecting evaporation efficiency. In contrast, low - concentration working conditions provide a more suitable "environment" for the application of eight - effect evaporators.

Data - Driven: Thermal Balance Calculations Lay the Foundation

The key to the practical implementation of a new technology lies in its solid theoretical basis. Jiuye Chemical has provided strong support for the feasibility of the eight - effect evaporator through precise thermal balance calculations. Research has shown that the temperature difference per effect of the low - concentration eight - effect evaporator is comparable to that of the high - concentration seven - effect evaporator. Excluding the first effect, the average temperature difference per effect is around 4 degrees Celsius. The high - concentration seven - effect evaporator has already achieved success in practical applications. Dozens of high - concentration seven - effect evaporators put into use by Jiuye Chemical have proven the feasibility of thermal power at a temperature difference of around 4 degrees Celsius with their stable performance and efficient operation. Since the low - concentration eight - effect evaporator has a comparable temperature difference per effect, it means its thermal power is equally reliable, providing theoretical assurance for the implementation of the technology.

 Backed by Experience: A Decade of Technological Accumulation Demonstrates Strength

Looking back on Jiuye Chemical's path of technological innovation, every breakthrough has been accompanied by doubts, but each time, the company has silenced market skepticism with its strength. When the seven - effect evaporator was first introduced ten years ago, there were numerous doubts: "Even foreign companies don't have it. Can we really succeed?" However, practice is the sole criterion for testing truth. The seven - effect evaporator not only performed excellently under low - concentration conditions but also achieved success in the high - concentration field, becoming a mature technology widely recognized in the industry.

Subsequently, the promotion of evaporative condensers also faced many doubts. Initially, some people believed that while they might work well for small evaporators, they might not be feasible for large ones. But after two 500 - ton seven - effect evaporators in the second phase of Huasheng Aluminum Industry, equipped with evaporative condensers, were successfully commissioned, the remarkable energy - saving effect completely dispelled all doubts. Nowadays, almost no new six - effect evaporators are being installed in the alumina industry, and seven - effect evaporators have become the mainstream. Through these successful practices, Jiuye Chemical has accumulated rich technical experience and market trust, injecting confidence into the promotion of the eight - effect evaporator.

Looking Ahead: The Industry Blueprint of the Eight - Effect Evaporator

In the alumina industry, enterprises that produce alumina using foreign gibbsite ore mostly operate under low - concentration evaporation conditions. With the gradual promotion of the eight - effect evaporator technology, in the near future, this field is likely to become the "domain" of eight - effect evaporators. It will not only help enterprises reduce production costs and enhance their competitiveness in the sluggish market but also drive the entire alumina industry towards a more efficient and energy - saving future.

The introduction of Jiuye Chemical's patented technology for the eight - effect evaporator is the result of technological innovation and also a precise grasp of industry development trends. It is believed that in the near future, this new technology will shine brightly in the alumina industry, creating greater value for enterprises!