Electrolytic zinc zinc sulfate liquid co-boron and nickel removal purification agent

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The current purification methods used for removing cobalt and nickel from electrolytic zinc include zinc powder-antimony salt purification, zinc powder-arsenic salt purification, β-naphthol-based cobalt removal methods, and xanthate-based cobalt removal methods. These traditional approaches either require long purification times, offer unstable results, or fail to achieve complete removal of impurities； Either the chemicals are expensive, difficult to use, and have adverse effects on workers or the environment ； Either toxic and harmful gases will be produced, or high-risk waste residues containing toxic heavy metals will arise. I. Characteristics and Advantages of the New Generation of Impurity Removers The characteristics and advantages of the new generation of impurity removers when compared to zinc powder and other similar purification agents in terms of impurity removal: ① Stable and efficient impurity removal – it can reduce the levels of copper, cadmium, cobalt, and nickel impurities in liquids to less than 1 mg/L, or even lower; impurities do not re-dissolve during the reaction and filtration processes, enabling deep purification of zinc sulfate solutions ； ② It will not cause an accumulation of organic substances that could affect the electrolysis system ； ③ The reaction takes only 25–30 minutes, reducing power and steam consumption ； ④ Compared with conventional zinc powder purification, it can reduce purification costs ； ⑤ Easy to operate; even ordinary workers can master it ； ⑥ This product is particularly suitable for removing cobalt and nickel impurities from zinc sulfate solutions with high levels of such impurities, such as in the production of electrolytic zinc using zinc monoxide as a raw material or in the treatment processes for waste slag from electrolytic zinc plants. II. Operation Method Step 1: Adjust the pH of the zinc sulfate solution to 4.5–5.2, and raise the temperature to 75–85°C. Step 2: Add 1# impurity remover in an amount 4 to 6 times the mass of cobalt, and stir for 3 to 5 minutes. Step 3: Add 2# impurity remover at the rate of (mass of copper + cadmium + nickel) × 15–18 plus mass of cobalt × 18–20. Step 4: Maintain the reaction temperature at 75–85°C and stir for 25–30 minutes; once the reaction is complete, filter after sampling and analyzing to confirm it meets the requirements. If necessary, you can contact 2565926857@qq.com