Method for preparing ceramsite through microwave sintering and curing of heavy metal chromium
A microwave sintering and heavy metal technology, applied in applications, household appliances, ceramic products, etc., can solve the problems of long effective time, incomplete curing, incomplete treatment, etc., to achieve good sintering quality, avoid uneven heating, and improve curing efficiency. Effect
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Embodiment 1
[0024] Using microwave sintering to solidify heavy metal chromium to prepare ceramsite, the method is as follows:
[0025] 1) Chromium-contaminated soil sample: take the polluted soil near a chemical plant, the chromium content in this soil is 1453.44mg / kg;
[0026] 2) Treatment of chromium-contaminated soil: Weigh the chromium-contaminated soil sample and dry it in a drying box for 3 hours, then cool the chromium-contaminated soil to room temperature, and put the powder in a ceramic ball mill for 30 minutes until the 100-mesh sieve remains ≤ 15%;
[0027] 3) Mixed aging: add water to the treated soil in step 2) with graphite powder, iron oxide, aluminum powder, and potassium feldspar in a mass ratio of 82:5:5:2:5 (the mass of water is 10% of the total mass of solids) ) mixed evenly, and aged for 24 hours to make ceramsite blank;
[0028] 4) Sintering: Put the ceramsite blank obtained in step 3) into a microwave sintering furnace (output frequency is 2450±50MHz, output power ...
Embodiment 2
[0031] Using microwave sintering to solidify heavy metal chromium to prepare ceramsite, the method is as follows:
[0032] 1) Chromium-contaminated soil sample: take the polluted soil near a chemical plant, the chromium content in this soil is 1453.44mg / kg;
[0033] 2) Treatment of chromium-contaminated soil: Weigh the chromium-contaminated soil sample and dry it in a drying box for 3 hours, then cool the contaminated soil to room temperature, and put the powder in a ceramic ball mill for 30 minutes until the 100-mesh sieve remains ≤ 15%;
[0034] 3) Mixed aging: add water to the treated soil in step 2) with graphite powder, iron oxide, aluminum powder, and potassium feldspar at a mass ratio of 80:5:3:2:7 (the mass of water is 8% of the total solid mass) ) mixed evenly, and aged for 24 hours to make ceramsite blank;
[0035] 4) Sintering: Put the ceramsite blank obtained in step 3) into a microwave sintering furnace (output frequency is 2450±50MHz, output power 12KW), and car...
Embodiment 3
[0038] Using microwave sintering to solidify heavy metal chromium to prepare ceramsite, the method is as follows:
[0039] 1) Chromium-contaminated soil sample: take the polluted soil near a chemical plant, the chromium content in this soil is 1453.44mg / kg;
[0040] 2) Treatment of chromium-contaminated soil: Weigh 100 g of chromium-contaminated soil sample and dry it in a drying oven for 3 hours, then cool the contaminated soil to room temperature, and put the powder in a ceramic ball mill for 30 minutes until the residue on a 100-mesh sieve is ≤15%;
[0041] 3) Mixed aging: add water to the treated soil in step 2) with graphite powder, iron oxide, aluminum powder and potassium feldspar according to the mass ratio of 84:3:3:3:7 (the mass of water is 8% of the total solid mass) Mix evenly, and make ceramsite blank after aging for 24 hours;
[0042]4) Sintering: Put the ceramsite blank obtained in step 3) into a microwave sintering furnace (output frequency is 2450±50MHz, outp...
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