Method for arsenic removal of arsenic-containing dust and comprehensive recycling of valuable elements
A technology of valuable elements and arsenic fume, applied in the field of metallurgy, can solve the problems of low comprehensive recovery rate of valuable elements, limited market for arsenic products, untreated sodium arsenate, etc. Wide range, low arsenic effect
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Embodiment 1
[0054] Taking arsenic-containing soot from a lead-zinc smelter in China as an example, it includes the following main components in terms of mass percentage: Pb 5.26%, As 39.65%, Sn 0.5%, Sb 29.36%, Zn 0.12%, Se 0.04%.
[0055] Weigh a certain mass of the high arsenic and antimony fumes in the reaction kettle, according to the liquid-solid volume mass ratio of 10:1 (ml:g), the stirring speed is 700r / min, the NaOH concentration is 1mol / L, the leaching temperature is 80°C, and the leaching time is 2h. conditions for leaching experiments. After leaching, the slurry was removed and separated by filtration; the arsenic leaching rate was measured to be 72.36%, and the concentration of elements in the leach solution were Pb 86.00ppm, Se 1.80ppm, Zn 20ppm, Sb 1.36g / L, and As 28.69g / L.
[0056] The leaching solution adopts the method of catalytic oxidation to decompose As 3+ Oxidized to As 5+ , the control conditions are as follows: the oxygen flow rate is 5L / min, the As / Mn molar rat...
Embodiment 2
[0061] Taking arsenic-containing soot from a domestic lead-zinc smelter as an example, it includes the following main components in terms of mass percentage: Pb 10.39%, As 34.59%, Sn 1.45%, Sb 20.54%, Zn 0.11%, Se 0.24%.
[0062] Weigh a certain mass of the high arsenic and antimony fumes in the reaction kettle, according to the liquid-solid volume mass ratio of 10:1 (ml:g), the stirring speed is 700r / min, the NaOH concentration is 3mol / L, the leaching temperature is 50°C, and the leaching time is 4h. conditions for leaching experiments. After leaching, the slurry was removed and separated by filtration; the arsenic leaching rate was measured to be 52.06%, and the concentrations of elements in the leach solution were Pb 87ppm, Se 0.52ppm, Zn 71ppm, Sb 1.24g / L, and As 18.01g / L.
[0063] The leaching solution adopts the method of catalytic oxidation to decompose As 3+ Oxidized to As 5+ , the control conditions are as follows: the oxygen flow rate is 10L / min, the As / Mn molar ra...
Embodiment 3
[0068] Taking arsenic-containing soot from a lead-zinc smelter in China as an example, it includes the following main components in terms of mass percentage: Pb 19.57%, As 24.26%, Sn 1.47%, Sb 30.45%, Zn 0.16%, Se 0.21%.
[0069] Weigh a certain mass of the high arsenic and antimony fumes in the reaction kettle, according to the liquid-solid volume mass ratio 5:1 (ml:g), stirring speed 1000r / min, NaOH concentration 1mol / L, leaching temperature 30 ℃, leaching time 2h conditions for leaching experiments. After leaching, the slurry was removed and separated by filtration; the arsenic leaching rate was measured to be 42.26%, and the concentrations of elements in the leach solution were Pb 124ppm, Se 0.67ppm, Zn 107ppm, Sb 2.02g / L, and As 10.25g / L.
[0070] The leaching solution adopts the method of catalytic oxidation to decompose As 3+ Oxidized to As 5+ , the control conditions are as follows: the oxygen flow rate is 1L / min, the As / Mn molar ratio is controlled at 20:1, and the ...
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