High Purity Aluminum

In China, aluminum with a purity of 99.95%-99.995% is called High Purity Aluminum, and there are 7 kinds of high purity aluminum produced: AL-99.995A, AL-99.993A, AL-99.99A, AL-99.98, AL-99.95, etc. .

High purity aluminum is produced from primary aluminum. The extraction of high purity aluminum is divided into three categories:

Three-layer liquid electrolysis. This method was invented by Alcoa Hoops, and industrial production began in 1992. This method has the advantages of large output and good quality, so it is widely used. However, it consumes a lot of electricity, produces fluoride and other wastes that are unfavorable to the environment, and requires a large investment in infrastructure.
coagulation extraction. According to the operation characteristics, solidification purification can be divided into directional extraction, distribution purification and regional smelting.
Electrolytic refining of organic solutions. This method can extract high purity aluminum (99.999%). The organic solution electrolytic refining method has the advantages of low electrolysis temperature and low power consumption, and can remove impurities that cannot be separated by the solidification purification method. There are two grades of high purity aluminum produced in China: AL-5N, AL-5N5.

U.S. aluminum by purity

Aluminum w%	name
99.5-99.79	Commercial Purity
99.80-99.949	High Purity
99.950-99.9959	Super Purity
99.9960-99.9990	Extreme Purity
>99.9990	Ultra Purity

The process of extracting pure aluminum by molten salt electrolysis has a history of more than 120 years, and it seems that the new aluminum smelting method under development will not become mainstream for at least the next 20 years. New aluminum smelting methods under development: aluminum chloride molten salt electrolysis, electrothermal smelting aluminum-silicon alloy, inert anode wettable cathode molten salt electrolysis, blast furnace aluminum smelting, manganese reduction, etc.

The main uses of high purity aluminum:

1. Anode aluminum foil for low voltage electrolytic capacitors, anode aluminum foil for high voltage electrolytic capacitors.

The environmentally friendly high and low voltage electronic aluminum foil products for electrolytic capacitors independently developed by our company have filled the domestic gap. We have built a domestic large-scale energy-saving electronic aluminum foil production line with a high starting point and high standards. The products have fully passed the international alliance ROHS environmental protection certification and overseas high-end customers. Green supplier certification. The products are widely used in high-end application fields such as new energy vehicles, charging piles, automotive electronics, industrial energy-saving equipment, and the performance indicators of the whole series of products have reached the advanced level.

2. Corrosion foil for anode and chemical foil for anode.

The corrosion and formation technology independently developed by our company has reached the international advanced level. The annual output of medium and high voltage electrode foil is 25 million square meters. The production process technology is environmentally friendly, energy-saving and green. The factory can mass-produce a full range of electrode foil products with a voltage of 210V-1050V, and has established long-term market cooperation with top 500 domestic and foreign companies such as Guimi Gong, Nichicon, GM, SONY, Gree, Huawei, Haier, etc. The products are widely used in Electronic information, new energy vehicles, 5G communications, industrial automation equipment, photovoltaic and wind power generation, household appliances and other fields.