Look for enamel repair technicians to solve this issue! ! !
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:) Could a professional be asked to analyze how to resolve the following situation? Considering the cost, please provide the most reasonable solution. Usage: The equipment consists of an enamel reactor and a stirring rod. The model is 10000L. The reaction medium contains 10% nitric acid and 4% hydrochloric acid, with a reaction temperature of 75–80°. The corrosion is quite severe. Based on past repair experiences, Belzona repair agents as well as ZH enamel repair agents have been used, but the repair effects were not very significant and the duration of effectiveness was short. I now want to use ceramic powder flame spraying technology, as well as coat the stirring rod with corrosion-resistant materials, such as polytetrafluoroethylene, rubber, fluoroplastics, and similar materials that are commonly used these days. Although we considered using titanium, it was not adopted due to its high cost. Also, if there are manufacturers with the aforementioned manufacturing processes, I hope they can provide their phone numbers for further discussions. :call:
I have repaired it before, and Belzona has also been used for this purpose. In 1999, I used enamel material for the repairs: I mixed enamel powder containing nickel and cobalt, mechanically removed rust from the area to be repaired and cleared away any grease, then applied the prepared enamel powder. A 3x2kw silicon carbide rod was used – 3kw at first and 6kw later – with a heating time of 2-3 hours. Once the desired temperature was reached, the process continued until the enamel powder melted and merged with the surrounding enamel, without any flow occurring. The area was then kept at that temperature for 1.5 hours, after which the power of the heating element was reduced (the entire process was controlled using a voltage regulator). Insulating glass wool was used on the opposite side of the heating rod as well as around it to prevent heat loss; the cooling time was 1.5-2.5 hours. Then it’s OK.
There are many who repair enamel tanks, but few can ensure the quality after the repairs. Our company has worked with several firms; a company in Zaoqiang did an excellent job repairing glass-lined tanks using flame spraying. All the tanks in our workshop were repaired by them, and no problems have occurred since then. Their contact information can be found online
Our company used Belzona when repairing for Shanghai Kao
If the enamel is damaged, it can be repaired using flame spraying; if the enamel on the mixing shaft is damaged, it is recommended to replace the shaft and change the shaft seal method to prevent corrosion by acidic gases. I’ve used one service provider; the repair work was of good quality. The cost is a bit high, around 5,000 yuan per unit, with additional charges for larger areas that need repairing.
Given the situation described by the poster, using PP coating on the mixing shaft is an effective method for corrosion protection, and the installation process is also relatively simple.
I wonder where the original poster is from? Are there many areas of corrosion in your equipment as well? We specialize in repainting enamel equipment, and we also provide on-site partial repairs; according to customer feedback, the results of these repairs are satisfactory. My contact number is 13676886196
Look at the location of corrosion; if it’s caused by stirring, a sleeve made of PTFE material can be used – that’s exactly what’s used for the pots in our unit. It seems to work pretty well. It was Fadel who did it. As for the reaction kettle itself, we use gaskets and gasket pins – is that effective? . It’s basically usable, but the price is way too high; the one with a diameter of 12 CM seems to cost over 10W, which is absolutely expensive. . It’s better to get a new one
Why is it so expensive? It usually costs around 1,000 to 2,000 yuan to take care of it.
Thank you, everyone! I haven’t been on the forum for a long time; I’ve been traveling around ever since the Spring Festival.
We also repaired the enamel using tantalum pins; it was a very small hole, and the repair was done by Fadel.