A cemented filling material for co-processing nickel-containing solid waste and its preparation method
A cemented filling material and co-processing technology, applied in sustainable waste treatment, solid waste management, climate sustainability, etc., can solve problems such as surface subsidence and nickel pollution, save a large area of land, have a wide range of sources, and reduce costs Effect
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Problems solved by technology
Method used
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Examples
Embodiment 1
Experiments and nickel toxicity leaching experiments.
Experimental method
[0035] Experimental group: inject 70.7×70.7×
In the standard test mold of 70.7mm, vibrate with a shaking table for 30s;
Control group: replace fly ash, red mud, slaked lime, modified coal gangue with 42.5 grade cement as cemented filling material
and blast furnace slag, other steps are exactly the same as the test group;
Experimental group and control group are dismantled after standing still for maintenance 24h, put into standard curing box respectively and carry out maintenance, wait until age period
The uniaxial unconfined compressive strength test and the nickel toxicity leaching test were carried out respectively.
Experimental result
[0039] The uniaxial unconfined compressive strength test results are shown in Table 1, and the nickel leachate concentration results are shown in Table 2.
Table 1
[0041]
Table 2
[0043]
[0044] Note: "ND" refers to that the nickel leaching concentra...
Embodiment 2
[0050]
[0052]
Embodiment 3
Carry out uniaxial infinite measurement compressive strength to the cemented filling material of the synergistic processing nickel-containing solid waste prepared by the present embodiment
Experiments and nickel toxicity leaching experiments. The experimental process is the same as in Example 1, and the uniaxial unconfined compressive strength test results are shown in Table 5.
The results of the leachate concentration are shown in Table 6.
Table 5
[0059]
Table 6
[0061]
[0062] Note: "ND" refers to the nickel leaching concentration below the detection limit.
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Abstract
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