Calcium and magnesium at the anode inlet and outlet of the electrolytic cell
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Recently, ICP analysis conducted at the inlets and outlets of the electrolysis cells revealed a problem: in some of the ten cells, the calcium and magnesium levels at the inlet were higher than those at the outlet, while in other cells the levels were lower at the inlet. Among my colleagues in Sichuan, which situation is considered normal?
It could be a sampling issue or a malfunction of the analysis instrument.
Is the sampling point for imported brine taken before or after acid addition? Sampling before acid addition may lead to contamination and analysis errors; after acid addition, the amount of acid used affects the analysis results due to the presence of calcium and magnesium in the acid. Is ICP analysis for exported brine accurate? There are also issues related to ion exchange membranes – the degree of contamination by previous brine varies from membrane to membrane in each tank, and depending on the osmotic energy, different amounts of calcium and magnesium may precipitate on the membranes, with some of these ions escaping directly from the system. In cases where there is slight membrane leakage in a particular tank, it’s difficult to make accurate calculations. To conduct proper testing, long-term monitoring is required to identify patterns; personally, I think such testing holds little value
It’s normal for the export value to be low. As for a high export value, it might be due to contamination in the samples; run more parallel tests. It could also be that plug flow has occurred in the saline solution. As long as the results are satisfactory, there’s no need to worry