Extraction of Aluminium in Fly Ash
There are three main types of extraction of Aluminium:
(1) Sulfuric acid refining: 1. The fly ash is ground and calcined and activated, and then leached by sulfuric acid and concentrated to obtain aluminum sulfate crystals; 2. after calcination, an alkaline solution is added; 3. using iron removal technology, Aluminum hydroxide is obtained; 4. It is then calcined and aluminium is obtained. Because sulfuric acid has strong acidity and volatility, it not only poses a threat to the safety of operators, but also pollutes the environment. Therefore, pay attention to safety during the operation.
(2) Refining ammonium aluminum sulfate: 1. Grinding fly ash and mixing with ammonium sulfate, then calcining at high temperature; 2. Leaching with sulfuric acid and filtering; 3. Using ammonia water to make the pH of the filtrate to about 2.0, then Aluminium ammonium sulfate crystals were precipitated; 4. Sulfuric acid was added at 60 ° C and cooled to precipitate all crystals. And repeated operations 3 times to obtain ammonium aluminum sulfate; 5. The product is thermally decomposed to obtain aluminium. This method can obtain aluminium with higher purity.
(3)Fluorine ammonium refining: 1. Mix fly ash with ammonium fluoride (acidic) solution and heat to obtain crude alumina; 2. Add alkaline solution, then pass carbonation and pyrolysis to obtain purer aluminium. This method has a large extraction rate, but the cost is high.
With a solid thirteen-year history of growth and expansion, SINOFLOChas become a leading manufacturer and supplier of water-soluble superabsorbent polymers in China. Founded in 2003 and expanded production capacity since 2009, now we have 2 facilities with the flocculants and coagulants capacity of 90,000 MT annually.
Отправить запрос, связаться с поставщиком
Другие товары поставщика
 |
Nonionic Flocculants for Industrial Wastewater Treatment | SINOFLOC is committed to being customer's most reliable supplier who could provide an extensive range of oilfield chemicalsand services, with high-... |
 |
Nonionic Flocculants for Industrial Wastewater Treatment | SINOFLOC nonionic flocculants are high and very high molecular weight nonionic polymers, in dry powder character. Our products have been specially ... |
 |
Coagulants | SINOFLOC offers an extensive range of organic coagulantssuch as polyamine, polyDADMAC and decoloring agent. Our products, being the cationic coagul... |
 |
Superabsorbent for Agriculture | The demand of conserving water resources is increasing along with the shortage of water resources all over the world. As one of the leading Superab... |
 |
Friction Reducer | SINOFLOC oilfield chemicalsis offering a broad range of leading-class friction reducer to our customers from fresh water to heavy brines. Our High ... |
