How to determine organic matter burnout in wet zinc smelting?
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This post was last edited by FILTRATION-MAN on 2009-9-20 09:34. The main raw materials for zinc production using the standard wet process are roasted ore and zinc suboxide powder; organic substances can cause problems such as plate burning during electrolysis. I am looking for information on the principles behind plate burning caused by organic substances, as well as ways to determine when such plate burning occurs How to remove organic matter from the system? Are there analytical methods to test organic substances? Please ask your friends for help, thank you!
Most electrolytic baking plates are composite baking plates. Organic matter on the plate: There are pinholes near the liquid line, and large, irregular cavities extend from the surface to the back side of the zinc plate; the zinc plate is thin, brittle, and easy to break. I’m not aware of the operating condition of your system equipment such as filter presses; under no circumstances should oil get into the electrolyte. According to available data, even a concentration of 5–10 mg/l of oil can cause damage to the plates. Additionally, As and Sb in the secondary zinc oxide solution must be carefully controlled. Carbon adsorption for oil use.
Thank you. The zinc sheets are honeycomb-shaped in structure. The system equipment uses plate and frame filtration; there are many pumps, and some oil may enter the system. Is there any organic matter in the secondary ZnO produced by the calcination furnace? If the system contains water-soluble organic substances, how should they be removed?
Zinc monoxide generally does not contain organic substances; at a temperature of 1200 degrees, the cause needs to be identified within the entire manufacturing process.
:P:victory:
There can be other reasons for the plate burning you mentioned, especially in the electrolytic process used to produce electrolytic zinc from zinc monoxide.
First, maintain the stability of the three major balances; the new solution should have sufficient time for precipitation, while at the same time enhancing leaching operations and process control. I’m sure it’s not a big problem!
I'm familiar with this. In the later stages of electrolytic production, when the oil content in the solution exceeds the specified limit, oil particles carrying impurity ions adhere to the cathode plates. This not only affects the purity of the cathode plates and results in an excessive level of impurities, failing to meet quality requirements, but it also severely impacts the physical properties of the electrolysis process; it causes the electrolyzed metal to become brittle, develop layers, experience surface cracking, form pores, growths, and even lead to damage to the cathode plates. Therefore, the raffinate must be deoiled before it can proceed to the next stage of electrolytic production. The testing of oil is carried out in accordance with GB/T16488-1996. As for the level of oil content at which the circuit board may be damaged, it depends on your specific circumstances; obviously, the lower the level, the better. Based on my experience in this area, it is best to keep the level below 5 mg/l; this not only allows for the recovery of the organic phase to generate economic value but also meets the requirements of the subsequent electrowinning process. If the water volume is low, activated carbon can be used; if the volume is high, oil removal equipment needs to be considered
Add activated carbon – simple, fast, and effective