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. Tungsten Chips,Tungsten Carbide Chips,Tungsten Carbide Grits,Tungsten Carbide Fragments Luoyang Golden Egret Geotools Co., Ltd , https://www.hvofpowders.com
Tungsten carbide grits are small particles or granules of tungsten carbide, a compound made up of tungsten and carbon atoms. They are extremely hard and have a high resistance to wear and abrasion, making them useful in a variety of industrial applications.
Tungsten carbide grits are often used as abrasives in cutting tools, grinding wheels, and sandpaper. They can also be used as an additive in metal alloys to improve their hardness and wear resistance. Additionally, tungsten carbide grits are used in the mining and drilling industry for rock drilling and excavation.
These grits are available in different sizes and shapes, such as spherical or irregular particles, depending on the specific application. They are typically produced through a process called sintering, where Tungsten Carbide Powder is heated and compressed to form a solid material.
Overall, tungsten carbide grits are highly valued for their hardness, durability, and resistance to wear, making them essential in various industries where high-performance materials are required.
Practice of treating cyanide-containing wastewater by activated carbon