A kind of cement solidification method of mixed incineration waste residue
A cement solidification and waste residue technology, which can be used in solid waste management, sustainable waste treatment, climate sustainability, etc. Effect
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Embodiment 1
[0021] A cement solidification method for mixing incineration waste slag, comprising the following steps:
[0022] (1) According to the number of parts by mass, take 100 parts of mixed incineration waste residue, add 1 part of potassium permanganate, add 100 parts of water, stir for 5-20 minutes, then add 5 parts of sodium thiosulfate, and continue stirring for 20 minutes;
[0023] (2) Continue to add 20 parts of fly ash and 2 parts of bistrimethylsilyl hydrogen phosphate to the mixed slurry obtained in step (1), and stir for 5-10 minutes;
[0024] (3) Add 30 parts of Portland cement, 5 parts of sodium lignosulfonate, 10 parts of biomass-based solid acid with an acid site of 0.5 mol / g and 8 parts of glass fiber to the mixed slurry obtained in step (2). part, then add 50 parts of water, stir until uniform, and place it at room temperature for 10 hours to obtain a cured body;
[0025] (4) Take water according to 10% of the weight of the solidified body to carry out pouring main...
Embodiment 2
[0029] Refer to the steps in Example 1 to solidify the mixed incineration waste residue. The difference is that the oxidant in step (1) uses 2 parts of ammonium persulfate, and the acid site of biomass solid acid in step (3) is 1.3 mol / g.
[0030] After solidification by the method in Example 2, the original leaching value of each metal in the leach solution meets the control limit for hazardous wastes allowed to enter the landfill specified in the "Hazardous Waste Landfill Pollution Control Standard (GB18598-2001)", wherein the leaching of pH The value is 9.
Embodiment 3
[0032] The mixed incineration waste residue was solidified with reference to the steps in Example 1, except that the amount of glass fiber added in step (3) was 12 parts.
[0033] After solidification by the method in Example 3, the original leaching value of each metal in the leach solution meets the control limit for hazardous wastes allowed to enter the landfill specified in the "Hazardous Waste Landfill Pollution Control Standard (GB18598-2001)", wherein the leaching of pH The value is 10. Compared with Example 1, the strength of the cured body in this example has been improved by 23%, which can meet the landfill requirements of the landfill.
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