Method for harmless and resourceful treatment of metallurgical hazardous waste
A hazardous waste and recycling technology, applied in the fields of comprehensive utilization of resources and environmental protection, can solve problems such as low added value of products, high environmental risks, and difficulty in recycling, and achieve significant social benefits and economic value, high degree of recycling, The effect of simple preparation process
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[0031] Example 1
[0032] The method for harmless and resource-based treatment of metallurgical hazardous waste according to the present invention includes the following specific steps:
[0033] (1) Pretreatment and ingredient mixing: take hazardous waste 1# and auxiliary materials, the microwave output power range of hazardous waste residue drying is 1kW, and the drying time is 20min; the drying microwave output power range of auxiliary materials is 0.5kW, and the drying time is 12min. The dried hazardous waste and auxiliary materials are ball milled and sieved, and the sieve is 180 meshes, and the under-sieved material is taken for batching (see Table 1) and mixing.
[0034] Table 1 Ratio 1#
[0035]
[0036] (2) Vitrification: vitrification is prepared by heating in an electric furnace, heating to 1250°C and holding for 3 hours;
[0037] (3) Microcrystallization: The three-stage microcrystallization heat treatment method is the front temperature range: 1250 to 1100℃, and the cooling...
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[0044] Example 2
[0045] The method for harmless and resource-based treatment of metallurgical hazardous waste according to the present invention includes the following specific steps:
[0046] (1) Pretreatment and ingredient mixing: take hazardous waste 2# and auxiliary materials, the microwave output power range of hazardous waste residue drying is 2kW, and the drying time is 10min; the drying microwave output power range of auxiliary materials is 1kW, and the drying time is 5min. The dried hazardous wastes and auxiliary materials are ball milled and sieved, and the sieve mesh number is 160 meshes, and the under-sieved materials are mixed (see Table 4) and mixed.
[0047] Table 4 Ratio 2#
[0048]
[0049] (2) Vitrification: vitrification is prepared by heating in an electric furnace, heating to 1350℃ and holding for 2 hours;
[0050] (3) Microcrystallization: The three-stage microcrystallization heat treatment method is the front temperature range: 1350 to 1120℃, and the cooling ra...
Example Embodiment
[0056] Example 3
[0057] The method for harmless and resource-based treatment of metallurgical hazardous waste according to the present invention includes the following specific steps:
[0058] (1) Pretreatment and ingredient mixing: take hazardous waste 3# and auxiliary materials, the microwave output power range of hazardous waste residue drying is 1.5kW, and the drying time is 15min; the drying microwave output power range of auxiliary materials is 0.7kW, and the drying time is 9min . The dried hazardous waste and auxiliary materials are ball-milled and sieved, and the sieve mesh is 180 meshes. The under-sieved materials are taken for batching (see Table 7) and mixing.
[0059] Table 7 Ratio 3#
[0060]
[0061]
[0062] (2) Vitrification: Vitrification is prepared by microwave heating, heating to 1450°C and holding for 30 minutes;
[0063] (3) Microcrystallization: The three-stage microcrystallization heat treatment method is the front temperature range: 1450 to 1100℃, and the co...
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