1. Sulfuric acid method
One method is to mix sulfuric acid and copper to heat
This method has less practical application because it will produce harmful gas sulfur dioxide .
2. In the sulfuric acid method, the copper powder is roasted at 600-700°C to be oxidized into copper oxide, and then decomposed and clarified by sulfuric acid to remove insoluble impurities. After cooling, crystallization, filtration, and drying, the finished copper sulfate is obtained.
2Cu + O 2 → 2CuO
CuO+H 2 SO 4 →CuSO 4 +H 2 O
3. Electrolyte recovery
Waste electrolyte (containing Cu 50-60g/L, H 2 SO 4 180-200g/L) and roasted copper mud are made into fine copper powder (the composition is Cu 65%-70%, CuO 20%-30 %, and contains a small amount of Cu 2 O, etc.) to react, the reaction liquid is separated and settled, the clear liquid is cooled and crystallized, separated and dried to obtain copper sulfate.
4. Recycling law
The copper pollution is the copper compound precipitate in the copper acetate ammonia solution in the copper scrubber of the synthetic ammonia raw material gas of the nitrogen fertilizer plant. After roasting at 700 ℃, it is oxidized to copper oxide and reacts with sulfuric acid to form copper sulfate. Dissolved copper, iron, acid leaching, chemical concentration crystallization method.
5. Use low-grade copper oxide ore (CuO about 3%) to be crushed to a certain particle size, add sulfuric acid for impregnation, and add copper-dissolving iron precipitation agent (composed of manganese, vanadium, and copper compounds) for direct acid leaching to obtain a copper-to-iron ratio greater than 100 Copper sulfate leaching solution, and then adding chemical concentrator (comprised of calcium and sulfur compounds) for chemical concentration, draining 70%-90% of water, a little evaporation, cooling and crystallization, centrifugal separation, and air drying to obtain copper sulfate products .
Account not verified