A kind of resource treatment method of waste residue containing arsenic
A treatment method and a resource-based technology, applied in the field of arsenic slag treatment, can solve the problems of arsenic content in waste slag that cannot meet safety requirements, secondary pollution, and reduced efficiency of arsenic leaching
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example 1
[0019] First, weigh 5 kg of arsenic-containing waste residue and 2 kg of lichens and add them to a ball mill for 50 minutes to obtain a mixture. Add sodium thiosulfate, mixture and water to a fermenter at a mass ratio of 1:10:50, stir and mix for 5 minutes to obtain a fermented bottom material, then in the fermentor, add the concentration of 8% of the fermentation substrate quality to be 10 5 cfu / mL dissimilatory iron-reducing bacteria suspension, sealed and fermented at 45°C for 15 days, after the fermentation was completed, the fermentation product was placed in a high-temperature sterilization box, and sterilized at a temperature of 135°C for 20 minutes to obtain a sterilized material , add 50g of sodium bicarbonate to the sterilized material, stir and mix for 2h, then pour it into a centrifuge, and centrifuge at a speed of 5000r / min for 15min to obtain a precipitate and a supernatant, respectively, and place the precipitate in a rotary kiln at 800 Calcined at ℃ for 6 hours...
example 2
[0021] First, weigh 3kg of arsenic-containing waste residue and 1kg of lichen, put them into a ball mill and mill them for 40 minutes to obtain a mixture, then add sodium thiosulfate, mixture and water into a fermentation tank at a mass ratio of 1:10:50, stir and mix for 3 minutes to obtain a fermentation bottom material, then in the fermentor, add the concentration of 8% of the fermentation substrate quality to be 10 5 cfu / mL dissimilatory iron-reducing bacteria suspension, sealed and fermented at 35°C for 12 days, after the fermentation was completed, the fermentation product was placed in a high-temperature sterilization box, and sterilized at a temperature of 125°C for 15 minutes to obtain a sterilized material , add 40g of sodium bicarbonate to the sterilized material, stir and mix for 1h, then pour it into a centrifuge, and centrifuge at a speed of 4000r / min for 10min to obtain a precipitate and a supernatant, respectively, and place the precipitate in a rotary kiln at 70...
example 3
[0023] First, weigh 4 kg of arsenic-containing waste residue and 1 kg of lichen and add them to a ball mill for 45 minutes to obtain a mixture. Add sodium thiosulfate, mixture and water to a fermenter at a mass ratio of 1:10:50, stir and mix for 4 minutes to obtain a fermented bottom material, then in the fermentor, add the concentration of 8% of the fermentation substrate quality to be 10 5cfu / mL dissimilatory iron-reducing bacteria suspension, sealed and fermented at 40°C for 13 days, after the fermentation was completed, the fermentation product was placed in a high-temperature sterilization box, and sterilized at a temperature of 130°C for 17 minutes to obtain a sterilized material , add 45g of sodium bicarbonate to the sterilized material, stir and mix for 2h, then pour it into a centrifuge, and centrifuge at a speed of 4500r / min for 12min to obtain a precipitate and a supernatant, respectively, and place the precipitate in a rotary kiln at 750 Calcined at ℃ for 6 hours t...
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