In-situ repair method of tailing sand heavy metal
An in-situ remediation and heavy metal technology, applied in the restoration of contaminated soil, etc., can solve the problems of unrepairable heavy metal pollution and no reports, and achieve the effects of reducing migration and infiltration, reducing waste of resources, and low cost
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Embodiment 1
[0055] High-pressure two-pipe rotary spraying process, ZJB-95 high-pressure pump, JAGUAR-6 high-pressure machine, JZP-1m 3 Type mixer, and a number of other accessories.
[0056] The heavy metals in the soil are passivated by the high-pressure rotary spraying technology by drilling holes in the underground soil and lowering the injection pipe, and then mixing the modified attapulgite and water under the conditions of air pressure 0.6MPa and pump pressure 25MPa to prepare a slurry to The slurry ratio of 1.12, the slurry flow rate is 90L / min, the speed increase is 14cm / min, and the rotating speed is 14r / min. The modified attapulgite is sprayed into the soil with the rotary spray column as the center of the circle and the radius is 30cm (the rotary spray range The maximum radius is 30cm), the soil: material addition ratio is 10:1. In the test, the total amount of modified attapulgite used is 2 tons, and a total of 6 holes are sprayed. Since the maximum buried depth of tailings s...
Embodiment 2
[0058] High-pressure two-pipe rotary spraying process, ZJB-95 high-pressure pump, JAGUAR-6 high-pressure machine, JZP-1m 3 Type mixer, and a number of other accessories.
[0059] The heavy metals in the soil are passivated by the high-pressure rotary spraying technology by drilling holes in the underground soil and lowering the injection pipe, and then mixing the modified attapulgite and water under the conditions of air pressure 0.6MPa and pump pressure 25MPa to prepare a slurry to The slurry ratio is 1.12, the slurry flow rate is 80L / min, the speed increase is 20cm / min, and the rotation speed is 16r / min. The modified attapulgite is sprayed into the soil with the rotary spray column as the center and a radius of 30cm. Soil: material The addition ratio is 10:1. In the test, the total amount of modified attapulgite used is 2 tons, and a total of 6 holes are sprayed. Since the maximum buried depth of the tailings sand is about 5m, the average material consumption per hole is 26...
Embodiment 3
[0061] High-pressure two-pipe rotary spraying process, ZJB-95 high-pressure pump, JAGUAR-6 high-pressure machine, JZP-1m 3 Type mixer, and a number of other accessories.
[0062] The heavy metals in the soil are passivated by the high-pressure rotary spraying technology by drilling holes in the underground soil and lowering the injection pipe, and then mixing the modified attapulgite and water under the conditions of an air pressure of 0.6MPa and a pump pressure of 20MPa to prepare a slurry to With a slurry ratio of 1.12, a slurry flow rate of 72L / min, a speed increase of 15cm / min, and a rotation speed of 14r / min, the modified attapulgite is sprayed into the soil with a rotary spray column as the center and a radius of 30cm. Soil: material The addition ratio is 10:1. In the test, the total amount of modified attapulgite used is 2 tons, and a total of 6 holes are sprayed. Since the maximum buried depth of tailings sand is about 5m, the average material consumption per hole is ...
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