Method for co-processing chromium-containing hazardous wastes and zinc-containing waste residues
A hazardous waste and co-processing technology, applied to the removal of solid waste, etc., can solve the problems of easy leaching of heavy metals and impact on environmental safety, and achieve the effects of improving reactivity, reducing mobility, and reducing the risk of environmental release
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Embodiment 1
[0032] In this example, the chromium-containing hazardous waste and the zinc-containing waste slag are co-processed, such as figure 1 As shown, the specific method is as follows:
[0033] The chromium-containing hazardous waste, zinc-containing waste residue and kyanite tailings are dried to reduce the moisture content of the chromium-containing hazardous waste, zinc-containing waste residue and kyanite tailings from 24%, 18% and 12% to below 3% respectively.
[0034] Mix the dried chromium hazardous waste, zinc-containing waste slag and kyanite tailings at a dry basis mass percentage of 12%: 20%: 68%, and add the mixed material to a vertical planetary ball mill for grinding for 6 hours at a speed of 650 rpm. After grinding, the obtained grinding product was put into a high-temperature furnace for high-temperature melting and solidification. The melting temperature was 1300° C. and the melting time was 9 minutes. After cooling, the solidified body A is obtained 1 .
[0035...
Embodiment 2
[0041] In this embodiment, the chromium-containing hazardous waste and the zinc-containing waste residue are co-processed, such as figure 1 As shown, the specific method is as follows:
[0042] The chromium-containing hazardous waste, zinc-containing waste residue and kyanite tailings are dried to reduce the moisture content of the chromium-containing hazardous waste, zinc-containing waste residue and kyanite tailings from 24%, 18% and 12% to below 3% respectively.
[0043] The dried chromium-containing hazardous waste, zinc-containing waste slag and kyanite tailings are mixed uniformly at a dry basis mass percentage of 8%: 20%: 72%, and the mixed material is added to a vertical planetary ball mill for grinding for 5.5 hours. 620 rpm. After grinding, the obtained grinding product was put into a high-temperature furnace for high-temperature melting and solidification. The melting temperature was 1250° C. and the melting time was 15 minutes. Solidified body B was obtained afte...
Embodiment 3
[0046] In this embodiment, the chromium-containing hazardous waste and the zinc-containing waste residue are co-processed, such as figure 1 As shown, the specific method is as follows:
[0047] The chromium-containing hazardous waste, zinc-containing waste residue and kyanite tailings are dried to reduce the moisture content of the chromium-containing hazardous waste, zinc-containing waste residue and kyanite tailings from 24%, 18% and 12% to below 3% respectively.
[0048] Mix the dried chromium hazardous waste, zinc-containing waste slag and kyanite tailings at a dry basis mass percentage of 18%: 12%: 70%, and add the mixed material to a vertical planetary ball mill for grinding for 6.5 hours at a speed of 650 rpm. After grinding, the obtained grinding product was put into a high-temperature furnace for high-temperature melting and solidification. The melting temperature was 1300° C. and the melting time was 10 minutes. Solidified body C was obtained after cooling.
[004...
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