Cold laminating is the most critical part in the lining materials of aluminum electrolytic cells. The national standard has strict requirements on the physical and chemical indexes of carbon blocks such as compressive strength, specific resistance, true and false specific gravity, ash content, and electrolytic expansion rate. The carbon blocks used for construction are free from the manufacturer's material list and have not been rechecked after entering the factory. Therefore, the following severe early damages occur. Before the trough's transverse crack stops, the dovetail trough is always surrounded by liquid aluminum, and the aluminum liquid passes through the carbon block cracks to reach the square steel, causing a current short circuit. Since the resistivity of aluminum is much smaller than that of carbon and square steel, this place The local concentration of current, resulting in local overheating, excessive temperature, thereby accelerating the melting of square steel, and the formation of aluminum alloy, prompting the early damage of the tank.
The reason for the early damage of the trough is even more obvious. The melting point of the square steel is on the upper surface, and the cracks at the bottom of the 37th block of carbon in the northern part of the crack just at the bottom of the carbon block are all sandwiched with aluminum. Correspondingly, these five square steels have all been dismantled to varying degrees. The bottom of the trough at the bottom of the whole block uplift, there are two horizontal cross-crack cracks in the carbon block overhaul after only 3 months of early damage, after the planer found the bottom of the carbon block as a whole, lift the height of the window from the top 28cm. The aluminum and electrolyte deposited between the bottom carbon block and the refractory bricks have formed aluminum-iron alloys around the individual square steels. The refractory bricks and insulation bricks have become black due to high-permeation carbon, and the refractory bricks and magnesia have been sintered into large blocks resembling vitreous bodies. Things. The reason why the bottom carbon block is convex is that the carbon block has a large area of ​​cracks. After the sodium is invaded, the carbon block has a loose structure, which promotes electrolytes and aluminum fluids to enter the space, causing the volume expansion between the carbon block and the fire brick and concomitantly generating a gray layer. As a result, the entire carbon block bulges at the bottom and is forced to stop overhauling.
FILMBASE LED Display FACTORY
Filmbase has a wide brand reputation and excellent market reputation, We are the top three ranked production and sales in the world's, Filmbase products are widely used in commercial buildings, high-end office buildings, five-star hotels, luxury brand cars, modern retail areas, Grade A office buildings, smart homes, medical and health care, bank offices, Silent Booth, modern bathroom,Led Glass Display,AD dispaly Filmbase led screem,Transparent LED Display Screen and so on.
Filmbase is a globally recognized leader in the development and production of Smart Film technology, we have a leading technology research and development laboratory and a modern factory base that exceeds international standards. With advanced testing equipment and multiple certifications, Filmbase continues to provide complete smart film, dimming glass, transparent display, and othersolutions for our global partners and engineering projects.
Led Glass Display,AD dispaly Filmbase led screem,Transparent LED Display Screen
Shenzhen Filmbase Technology Co., Ltd. , https://www.globalfilmbase.com