Electrolytic aluminum is produced through a process known as molten salt electrolysis, in which alumina is dissolved in molten cryolite. A high-intensity direct current is applied to the cell, using carbon blocks as the anode and molten aluminum as the cathode. Operating at approximately 950–970°C, this reaction converts alumina into aluminum metal. This electrochemical method is the foundation of modern aluminum production worldwide.

In China, modern pre-baked aluminum reduction cells form the core of primary aluminum production. Despite advancements in cell design and scale, maintaining longevity remains a major concern. The lifespan of these reduction cells is influenced not only by the cathode blocks used but also by various other factors including refractory materials, insulation systems, construction quality, start-up protocols, and operational efficiency. To achieve longer service life, more robust and thermally efficient materials are needed.

Electricity is a major contributor to aluminum production costs—accounting for nearly 40% of total expenses. Conventional insulation materials have reached their limits in improving energy efficiency. To address this, High-Strength Insulation Boards have been developed specifically for electrolytic aluminum applications. These next-generation insulation boards improve heat retention, reduce surface temperature on the cell’s outer shell, enhance current efficiency, and ultimately lower energy usage and operational costs.

High-strength insulation boards are an integral part of the cell's thermal structure, strategically installed along the cell bottom and sidewalls to enhance thermal performance.

The 0.5 lightweight insulating bricks serve to improve the wall’s thermal resistance while ensuring durability and strength are maintained.

Designed for high-temperature industrial environments, this insulation board is made entirely from inorganic materials and is suitable for continuous use at temperatures up to 1100°C. With its excellent mechanical and thermal properties, it is ideal for demanding aluminum electrolysis processes.

– Resistant to pressure and deformation

– Engineered to precise tolerances for seamless installation

– Performs reliably under extreme heat

– Enhances insulation and energy efficiency

– Safe, durable, and environmentally stable

By integrating high-strength insulation boards into electrolytic cells, aluminum producers can achieve significant gains in thermal efficiency, cost control, and equipment longevity. This advanced material plays a crucial role in driving the next phase of energy-efficient and sustainable aluminum production.