A kind of treatment method of steel mill dry desulfurization ash
A dry desulfurization ash and treatment method technology, which is applied in the field of solid waste treatment, can solve the problems of high moisture content of products and low oxidation efficiency of calcium sulfite, and achieve the effects of improving oxidation efficiency and shortening drying time
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Embodiment 1
[0028] Mix dry desulfurization ash from steel mills (dry desulfurization ash from steel mills comes from sintering machines in iron and steel enterprises) and washed stone chips with a particle size of about 4mm at a mixing mass ratio of 5:1, and stir evenly;
[0029] Inject SPM waste acid into the mixture of dry desulfurization ash and water-washed stone chips (SPM waste acid comes from the semiconductor cleaning process, the main components are sulfuric acid and hydrogen peroxide), keep stirring at a stirring speed of 100rpm, and add to the above mixture Introduce oxygen-containing gas, wherein the mixing mass ratio of SPM waste acid and dry desulfurization ash is controlled to be 1:3;
[0030] After reacting for 30 minutes, screen the modified dry desulfurization ash material, separate the remaining water-washed stone chips, and put the semi-dry state modified dry desulfurization ash material into the drying equipment, and dry it at 60°C for 1.5h After the dried product is ...
Embodiment 2
[0033] Mix dry desulfurization ash from steel mills (dry desulfurization ash from steel mills comes from sintering machines in iron and steel enterprises) and washed stone chips with a particle size of about 3mm at a mixing mass ratio of 6:1, and stir evenly;
[0034] Inject SPM waste acid into the mixture of dry desulfurization ash and water-washed stone chips (SPM waste acid comes from the semiconductor cleaning process, the main components are sulfuric acid and hydrogen peroxide), keep stirring at a stirring speed of 80rpm, and add to the above mixture Introduce oxygen-containing gas, wherein the mixing mass ratio of SPM waste acid and dry desulfurization ash is controlled to be 1:2;
[0035]After reacting for 20 minutes, screen the modified dry-process desulfurization ash material, separate the remaining water-washed stone chips, and put the semi-dry state modified dry-process desulfurization ash material into the drying equipment, and dry it at 60°C for 2 hours. After the...
Embodiment 3
[0038] Mix dry desulfurization ash from steel mills (dry desulfurization ash from steel mills comes from sintering machines in iron and steel enterprises) and washed stone chips with a particle size of about 5mm at a mixing mass ratio of 4:1, and stir evenly;
[0039] Inject SPM waste acid into the mixture of dry desulfurization ash and water-washed stone chips (SPM waste acid comes from the semiconductor cleaning process, the main components are sulfuric acid and hydrogen peroxide), keep stirring at a stirring speed of 120rpm, and add to the above mixture Introduce oxygen-containing gas, wherein the mixing mass ratio of SPM waste acid and dry desulfurization ash is controlled to be 1:4;
[0040] After reacting for 40 minutes, sieve the modified dry desulfurization ash material, separate the remaining water-washed stone chips, put the semi-dry state modified dry desulfurization ash material into the drying equipment, and dry it at 60°C for 1 hour. After the dried product is co...
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