Activated carbon treatment of cyanide-containing wastewater The practice of domestic application of activated carbon in the cyanide plant is only three, the following is only a brief introduction. 1. Full mud plant using a cyanide - zinc powder substitution gold extraction process, after the end of its cyanide tailings purification, cyanide concentration of 30mg / L, using activated carbon Changchun Institute of gold catalytic oxidation patented technology, only after a The oxidation tower is treated, the cyanide is reduced to 2 mg/L or less, and the reaction pH is 6.5-9. The gas-liquid ratio is 80, and the wastewater treatment capacity is 3 m3/th. Consumption per ton of waste water is approximately 0.1kg hydrochloride, copper sulfate pentahydrate 0.05kg, 1kWh electricity consumption, plant investment of about 4 million (not including plant). 2. A cyanide plant is located in the mountainous area. The whole mud cyanide-zinc powder replacement process is used to extract gold. The cyanide tail liquid contains about 70 mg/L of cyanide. After self-cleaning in the tailings pond, the cyanide content is reduced to about 3 mg/L. The process is carried out by the activated carbon catalytic hydrolysis process, and the cyanide reaches the standard after three adsorption columns. It can also recover more than 8kg of gold per year. The gold-loaded charcoal is treated by incineration. The activated carbon is not regenerated, and the investment cost of the activated carbon is not counted. The treated wastewater only consumes 0.05kwh/m3. The problem is that it cannot be used in winter, but in the winter, the tailings pond still has overflow water. 3. A cyanide plant in China adopts the whole mud cyanide-zinc powder replacement process to raise gold, the treatment capacity is 50t/d, and the cyanide tail is treated by alkaline chlorination process. For various reasons, the cyanide is discharged from the tail of the reservoir. The compound is often higher than 0.5mg/L. The wastewater is treated twice by the patented technology of activated carbon hydrolysis of Changchun Gold Research Institute. The annual recovery of gold is about 1.5kg, and the cyanide content of tailings pond is less than 5mg/L. After the cyanide standard, the removal rate of heavy metals such as Zn, Cu, Fe, etc. is also high, due to the view. The technology does not use power, and does not require special operation. The processing cost is only the labor cost of cleaning the carbon bed regularly every day. Due to the new technology of using activated carbon to elute gold, the activated carbon is regenerated, and the recovery cost of gold is only gold price. 10%, the economic benefits are considerable. Plastic Injection Mold,Plastic Mold Manufacturer ,Hot Sell Plastic Injection Mold,Good Price Plastic Mold Taizhou Langshun Trade Co.,ltd , https://www.lsblowingmachine.com