Acid aluminum slag production method for industrial aluminum fluoride The patent belongs to the fluoride salt industry in the chemical industry, and the product is aluminum fluoride and ammonium fluoride, among which aluminum fluoride is an indispensable electrolyte in electrolytic cells of electrolytic aluminum plants. Aluminum fluoride is mainly 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, approximately 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 in 2008 it will reach 10 million tons, 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 this patent produces great advantages: 1. The raw material is a kind of by-product in the production process of aluminum profile factory, the price is about 800-1000 yuan/ton, the auxiliary material only needs a few kg per ton, and the finished product price is high-fluorinated aluminum 6000 to 6400 yuan/ton, fluorination Ammonium 4500 ~ 5000 yuan / ton; 2, the product rate of up to 95%; 3, less investment, quick effect; 4. The patent is an environmental protection project. There is no waste residue generated in the process. Only a small amount of waste water is available. The discharge can be achieved with simple treatment.
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