Is it okay to use stainless steel 321 (OCr18Ni9Ti) for the valves used in the electrolytic process for zinc smelting?
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I would appreciate it if the teachers could provide more guidance regarding the specific operating conditions~
The material depends on the operating conditions; if the medium passing through the valve body is corrosive, a corrosion-resistant material should be chosen, with cost being another factor to consider.
I want to know more about the specific operating conditions of the ionization process. . . If any of you who work with seas know about this operating condition, please share your insights. . Thank you~
The operating conditions in the electrolytic zinc production process are as follows: the fresh solution contains about 150 g/l of zinc and no acid; the waste solution contains about 160 g/l of acid and about 50 g/l of zinc, with chloride ions present in varying amounts, ranging from approximately 100 to 600 mg/l. 316L ball valves are commonly used in the industry. Is OCr18Ni9Ti the same as 321?
Reply to 4# jin*n616: Thank you. . It’s 321. A client previously chose valves made of this material for this application, but the performance was not satisfactory. 316L valves have now been installed on this process. I would like to recommend PTFE-lined valves, but I’m not sure if that’s feasible.
Either a steel lining with 4F or a steel lining with PE can be used; the temperatures are not high, so there’s no major issue. The option that is more expensive is also more durable.
Reply to 6# jin*n616: We recommended lined valves to the customer, but they still want to use the previous model. Hehe, all the teachers know that lined valves can be used here; those who use valves surely know they can serve as a substitute. At the very least, it’s worth giving it a try. Otherwise, there’s no need to replace them every two months, right? . It’s just a matter of using some public relations tactics. . Thank you~