What causes the finished acid to have a yellow color?
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During acid production through smelting, the finished acid turns yellow and this condition persists for almost a month – what could be the reason?
Is the acid produced from zinc concentrate, sulfur concentrate, or copper concentrate?
You can explain your situation in more detail; it’s difficult to analyze it if it’s not clear.
Based on your situation, it might be caused by high levels of iron ions. First, check your storage tank to see if it was cleaned thoroughly before use, and also verify whether the purification level meets the required standards.
Copper-containing gold concentrate is subjected to sulfation roasting, and the flue gas is used to produce acid; the process follows a 3+2 two-turn two-absorption scheme. The resulting acid is yellow in color; the reason for this is unknown, but adding hydrogen peroxide makes the color disappear.