Method for removing iron and manganese from solution in zinc smelting process
A zinc smelting and solution technology, applied in chemical instruments and methods, filtration treatment, metallurgical wastewater treatment and other directions, can solve the problems of difficult control of manganese element balance, low iron and manganese removal efficiency, long process flow, etc. The effect of strong performance and shortening of the process flow
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Embodiment 1
[0043] The raw material is the high manganese zinc concentrate smelting process liquid, and the process position is the clean liquid process.
[0044] In its smelting process liquid: Zn 2+ 140~150g / L, Mn 2+ 11~12g / L,Fe 2+ 1g / L, SO 4 2- 220~230g / L.
[0045] Add sulfur dioxide-containing flue gas as a catalyst to the above-mentioned zinc smelting process solution, and the amount of feed is 1.5 times the total molar number of iron ions and manganese ions in the above-mentioned zinc smelting process solution, and the oxygen-enriched air ( Oxygen volume concentration is 25%) to disperse as an oxidant, the reaction temperature is 50°C, the reaction pressure is 0.3MPa, the pH value of the reaction system is 4.0, and the reaction time is 3h, the catalytic oxidation reaction forms a slurry containing iron and manganese slag; Iron-manganese slag is returned to the reaction system of catalytic oxidation reaction as crystal seed, and the seed crystal ratio is 3; The slurry contain...
Embodiment 2
[0048] The raw material is the smelting process liquid of high manganese zinc concentrate, and the process location is the leaching process.
[0049] In its smelting process liquid: Zn 2+ 140~150g / L, Mn 2+ ~20g / L, Fe 2+ 4~5g / L, SO 4 2- 250~270g / L.
[0050] Add sulfur dioxide-containing flue gas as a catalyst to the above zinc smelting process solution, the flux is 1.4mol / L, directly add oxygen-enriched air from the bottom of the reactor as an oxidant, the reaction temperature is 90°C, the reaction pressure is 0.3MPa, the reaction system The pH value of the solution is 4.0, the reaction time is 2h, and the catalytic oxidation reaction forms a slurry containing iron-manganese slag; take the iron-manganese slag as a seed crystal and return it to the reaction system of the catalytic oxidation reaction, and the seed crystal ratio is 2:1; The slurry of ferromanganese slag is densely separated and separated by filtration to obtain ferromanganese slag and liquid after iron and...
Embodiment 3
[0053] The raw material is zinc smelting process liquid, and the process location is waste liquid treatment.
[0054] In its smelting process liquid: Zn 2+ 50~55g / L, Mn 2+ 5~7g / L,Fe 2+ 0.5~0.6g / L,SO 4 2- 84~95g / L.
[0055] Add sulfur dioxide as a catalyst to the above zinc smelting process solution, the flux is 0.35mol / L, use dispersing equipment to make the oxygen-enriched air and the smelting process liquid of this embodiment into a multiphase medium, add the reactor as an oxidant, and the reaction temperature is 30 ℃, the reaction pressure is 0.3MPa, the pH value of the reaction system is 4.0, and the reaction time is 3h, the catalytic oxidation reaction forms a slurry containing iron-manganese slag; take the iron-manganese slag as a seed crystal and return it to the reaction system of the catalytic oxidation reaction, The seed ratio is 3:1; thicken and filter the slurry containing iron and manganese slag to obtain iron and manganese slag and liquid after removing i...
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