There are various mechanisms for the destruction or loss of cyanide in the heap. These mechanisms include: bacteria, that is, the action of microorganisms; the action of air; the action of sunlight; and the action of the pile. First, the role of microorganisms Cyanide contains two basic life elements, carbon and nitrogen. These elements in cyanide are bonded by a high-energy, carbon-nitrogen bond, so cyanide is an ideal food for microorganisms. When cyanide is combined with oxygen, soda ash and trace amounts of phosphorus , the microorganisms can grow vigorously, and the cyanide destruction by the microorganisms is complete. Cyanide is oxidized to form CO 2 or hydrocarbons, while nitrogen is converted to nitrogen or protein. The biological treatment process can also remove thiocyanate, a free and metal complexed cyanide, metals and ammonia. Biodegradable products include sulfur, nitrogen and carbon. Second, the role of air Oxygen in the air is an effective oxidant for cyanide. This oxidation process must have a catalyst. Many compounds are effective catalysts, and sulfur oxide or sulfite ions have recently been used as catalysts. Materials have some activity, such as activated carbon, iron oxide, manganese oxide, clay (clay), zeolites, and active silica, it can also act as a catalyst. Some of the above compounds may be present in the heap leach or heap material. Cyanide reacts with air as 4NaCN + 50 2 + 2H 2 O - 2N 2 + 4CO 2 + 4NaOH Third, the role of sunlight Sunlight also acts to catalyze the reaction of oxygen and cyanide, which is especially effective. When cyanide on the surface of the heap or cyanide is sprayed into the air, it can be oxidized with cyanide under exposure to ultraviolet radiation. Automatic 3D Fiber Laser Pipe Cutting Machine
Technical advantages:
1. Excellent and efficient processing: Five-axis linkage of the bus system realizes space leapfrog and flying cutting technology, and improves efficiency by more than 20-50%.
2. Pipe cutting system: user-friendly and easy to operate, with sufficient pipe process database.
3. Special bed design:reinforced integrated welding bed, after annealing and twice aging treatment, with good stability.
4. Simple and convenient maintenance: the front chuck has good sealing performance and is more durable against dust; The rear chuck blows air automatically, and the pipe wall is cleaner.
5. Automatic feeding rack(optional): realize automatic clamping, pushing and accurate feeding with fast cyclic feeding speed.
6. Good quality and high precision: front and rear full stroke precision pneumatic chuck, multi axis linkage at the same time, good cutting effect and high precision.
7. A15: Double chuck short tailing:the cutting head spans from the front to the back of the front chuck and cuts the last workpiece.The tailing ≥ 40mm can save more material costs.
8. Excellent processing performance: it adopts high rigidity thickened bed, with bus pipe cutting system and bus motor which has faster processing speed and higher precision.
9. Slag extraction system (optional): solve the problem that there is no residue on the inner wall of the pipe, eliminating the secondary vibration polishing process.
10. High efficiency feeding system (optional): high rigidity design of feeding rack, stable and fast feeding and refueling, and the cycle time is about 10 seconds.
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What is included in natural degradation?