Acid aluminum slag preparation method for industrial aluminum fluoride

Acid aluminum slag production method for industrial aluminum fluoride The patent belongs to the fluoride salt industry in the chemical industry. The product is aluminum fluoride and ammonium fluoride, among which aluminum fluoride is an essential electrolyte in electrolytic cells of electrolytic aluminum plants. Fluoride is sold to the electrolytic aluminum plant and exports; ammonium fluoride is an important chemical raw material, mainly used for the extraction of rare metals.
For every ton of aluminum ingot produced by an electrolytic aluminum plant, about 30 kg of aluminum fluoride is required. In 2001, China produced about 2.8 million tons of aluminum-ammonium, and 5 million tons in 2003. It is estimated that it will reach 10 million tons in 2008 and the demand for aluminum fluoride will reach 300,000 tons.
The demand for ammonium fluoride has increased year by year with the development of the rare metal industry. At the same time can export foreign exchange.
Ammonium fluoride can also be converted into ammonium bifluoride, which is used as the corrosive agent in the production of aluminum profiles. At present, the annual sales volume of ammonium bifluoride in the industry is 20,000 to 30,000 tons. The use of the patented production has great advantages: 1. The raw material is a by-product in the production process of an aluminum profile plant, the price is about 800-1000 yuan/ton, the auxiliary material only needs a few kg per ton, and the finished product is high in fluorine. Aluminum 6000 ~ 6400 yuan / ton, ammonium fluoride 4500 ~ 5000 yuan / ton; 2, product rate as high as 95%; 3, less investment, quick; 4, the patent for environmental protection projects, the process no waste residue, only A small amount of waste water can be discharged by standard treatment.