Ferrous sulfate contains different impurities due to different ore sources. It must be classified and removed to improve its purity. The specific method is as follows. Selection of ferrous sulfate heptahydrate impurity remover. Dissolve 150g of ferrous sulfate in 1L of ionized wa

Ferrous sulfate Because the products from different mineral sources contain different impurities, they must be classified and removed to improve their purity. The specific method is as follows

Ferrous sulfate heptahydrate

Selection of impurity remover

Dissolve 150g of ferrous sulfate in Configure 150g/L ferrous sulfate solution in 1L of ionized water to conduct a series experiment. The solution is stirred for 40min at 25°C and the rotation speed is controlled at 30r/min. After stirring, let it stand for 30 minutes and then filter to remove impurities, then measure the concentration of heavy metals. Sodium sulfide, sodium carbonate , sodium oxalate , iron sulfide, ammonium carbonate were added respectively to conduct impurity removal experiments. From the experimental results of Chunze water purification technology, it can be seen that the use of sodium sulfide has a good impurity removal effect, so sulfide was chosen. Sodium acts as an impurity remover.

Ferrous sulfate monohydrate

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Selection of the amount of impurity remover

Dissolve 120g ferrous sulfate solution in 1L of ionized water, prepare a 120g/L ferrous sulfate solution, and add the pre-configured 50g/L to this solution Sodium sulfide solution, remove heavy metals from ferrous sulfate, stir the solution at 15-25°C for 20-40 minutes, and control the rotation speed at 30-50r/min. After stirring is completed, let it stand for 30-60 minutes and then filter to remove impurities. It can be seen from the experimental results of Chunze Company that using 150ml of 50g/L sodium sulfide solution has a good impurity removal effect, so 150ml of 50g/L sodium sulfide was selected as the ferrous sulfate impurity removal agent.