The de-coating is a thermal treatment applied on the aluminium scrap, used to remove from the surface of the material all the contaminants as paper, oil, links, paint, plastic.

Drosses are generally classified in accordance with metal content into white and black dross. White dross contains larger quantity of aluminium content and it is produced from primary and secondary aluminium smelters. White dross contains from 15 to 70% recoverable metallic aluminium and it contains a fine powder from skimming the molten aluminium. For the case of black dross, it contains lesser metal content and is generated during aluminium recycling. Black dross consists of a mixture of aluminium oxides and slag, with recoverable aluminium content ranging between 12 and 18%, and larger salt content i.e., higher than 40% compared to white dross. The term ‘salt cake’ signifies the non metallic residue obtained from dross smelting operations and generally contains 3–5% residual metallic aluminium. It was reported in the literature that about four million tonnes of white dross and more than one million tonne of black dross is being produced every year and about 95% of this is landfilled.

As for our company we use machines for decoating of waste aluminums, and then recycling to other areas.

Hengyang Industry is an Chinese Company based in Zhengzhou city that manufactures, on proprietary technology, plants and equipment for waste recycling and recovery with energy production, material recovery or production of finished goods.

Innovation, R&D, passionate and skilled team along with the customer satisfaction have always been the success of Hengyang and they still are the peculiarities of our Company. Besides the historical Hengyang equipment, like single and double shafts shredders, Crushing machine, briquetting machines, separators, squeezers and centrifuges, the Company offers a wide range of turn-key plants, among which:

• briquetting and pelletizing plants
• shredding plants
• Waste Sorting Plants
• Bio-fuel Plants
• Waste to Power Recycling Plants
• Mining Plants
• OEM Equipments
……..
Hengyang is able to develop customized solutions too.
Designed, constructed and assembled by the same Hengyang

The Company policy focuses on product quality: robustness and functionality of the machines that maintain their value over time.
The ability to challenge ideas and concepts and to interact with partners worldwide has allowed and still allows Hengyang to stay highly competitive and to be an ideal partner for the world market.