Recycling bismuth from bismuth slag
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Our company currently has a batch of material containing approximately 15–30% Bi, and it also has a high content of sodium sulfate. How can we concentrate the bismuth? ? To achieve about 90% bismuth.
First, conduct rough refining by thermal methods (a reverberatory furnace can be used), and then carry out fine refining by thermal methods or electrolytic refining
I agree with the view from the second floor; if the quantity is small, a small converter with a diameter of around 1 meter can also be used. If you have any questions, feel free to ask me
Bismuth is leached using a hydrochloric acid system, followed by hydrolysis to yield bismuth oxychloride, which can then be further processed. The solution can also be directly used to produce sponge bismuth via iron displacement, and further processing can yield the desired bismuth.
That’s basically what our experiments look like at the moment. The raw materials are a bit uneven, with some having a high Sb content as well. . . Also, we added alkali for melting after obtaining bismuth sponge, but the result was not very good.