Zinc smelting electrolytic baking plate

General board burning: This phenomenon is usually caused by high levels of impurities in the electrolyte, exceeding the allowable limits. Or the electrolyte has a low zinc content and a high acid content. When the electrolyte temperature is too high, it can also cause widespread board burning. When this occurs, the first step should be to take a sample to analyze the composition of the electrolyte. Based on the analysis results, immediate actions should be taken to enhance the purification process of the solution in order to improve the quality of the purified liquid. During the electrolysis process, the circulation rate of the electrolyte should be increased to rapidly raise its zinc content. In severe cases, it is also necessary to inspect the raw materials and enhance the leaching process, such as intensifying water treatment to remove impurities and appropriately increasing the amount of iron removed during leaching. At the same time, the electrolysis conditions should be adjusted appropriately; for example, increasing the circulation rate and reducing the cell temperature as well as the acidity of the solution can also help to alleviate the situation to some extent.

Individual plate damage: Due to careless handling, copper contaminants ended up in the electrolytic cells; or an excessive amount of tartaric acid was added, resulting in increased levels of copper and antimony in the electrolyte of certain cells, which caused damage to those plates； Furthermore, due to the insufficient amount of circulating liquid entering the tank, the temperature of the tank rises, resulting in too low zinc content and too high acid content in the electrolyte within the tank, which causes cathodic back-dissolution ； Anode-cathode short circuit can also cause the tank temperature to rise, leading to cathode back-dissolution.

Is it board burn caused by severe dissolution due to power outages and acid penetration? Is the poster from Danxia Mountain?

For board burnout, you need to figure out what kind of impurity is causing it; you have to first determine which impurity is responsible for the board burnout. . Burning plates free of impurities are all different. You can tell just by looking at the zinc coating

Reply to 4# wj24tm: There’s a bit of power outage and back-dissolution going on! The test results show that the germanium level is on the high side; the value for the incoming liquid is around 0.02, while it is 0.030–0.037 for the waste liquid. All other values are normal. The liquid is turning white and bubbling.

Reply to 6# phz: How long was the power outage? How long was the electrolysis time before the power outage? Was it because the electrolysis time earlier wasn’t very long, and then a power outage occurred, resulting in the re-dissolution of zinc at the cathode and acid penetration? ； When electrolyzing again, does it cause the plate to burn because it is an acid-permeable plate? It should be much better now, right?

Reply to 7# wj24tm: Yes, electrolysis was started just a few days ago; things weren’t working properly at first. Then there was a power outage of about 40–50 minutes, which caused the solution to re-dissolve, but things are now almost back to normal.

This post was last edited and replied to by wj24tm on 2010-12-7 at 16:26. Reply 8# phz: Haha, it’s still in the process adjustment phase; a germanium level of no more than 0.05 mg/L should not have any significant impact. There are also sudden power outages, which are beyond human control.

It should be back to normal now; after a power outage, the cathode plates need to be properly treated as required, so that they won’t get damaged in the next occurrence of such an issue

Reply to 10# lcylidong: Yes, it’s crucial to properly treat the cathode plates as required when taking them out of the tank; otherwise, the plates may get damaged, leading to localized spark discharge, and they might also separate from their mounts.