Method for raising the level of coal ash

Abstract

To provide a method for raising the volume of coal ash that can reduce the location and cost of processing coal ash, prevent the scattering of coal ash, and raise the volume of more coal ash. [Solution] The method for raising the level of coal ash comprises: a coal ash slurry generation step (step S10) in which coal ash, water, and cement are mixed to produce a coal ash slurry; a coal ash slurry raising step (step S11) in which the coal ash slurry generated in the coal ash slurry generation step (step S10) is poured into a raising point P provided on the ground to raise the level of coal ash; and a coal ash slurry hardening step (step S13) in which the coal ash slurry raised in the coal ash slurry raising step (step S10) is left to stand for a predetermined time to harden. Furthermore, the cement content of the coal ash slurry generated in the coal ash slurry generation step (step S10) is 50 kg / m³. 3 That's all.

Claims

1. A coal ash slurry production process involves mixing coal ash, water, and cement to produce a coal ash slurry, A raising process involves pouring the coal ash slurry produced in the coal ash slurry production process into a raised area on the ground to raise the level of the coal ash, The process includes a coal ash slurry hardening step in which the coal ash slurry raised in the raising step is left to stand for a predetermined time to harden, The cement content of the coal ash slurry produced in the aforementioned coal ash slurry production process is 50 kg / m³. ３ That concludes the explanation of the method for raising the volume of coal ash.

2. The method for raising the level of coal ash according to claim 1, wherein the leveling step includes an upper layer leveling step of further piling coal ash slurry on top of the coal ash slurry hardened in the coal ash slurry hardening step to raise the level.

3. The aforementioned raised section has multiple raised sections, A method for raising the level of coal ash according to claim 1 or 2, wherein, after completing the leveling process in a first leveling section among a plurality of leveling sections, the leveling process is started in a second leveling section different from the first leveling section among a plurality of leveling sections.

4. The method for raising the level of coal ash according to claim 3, wherein the multiple leveling sections are arranged in a horizontal and vertical direction, respectively.

5. A moisture content measurement step for measuring the moisture content of the coal ash slurry after raising the height in the aforementioned raising step, A method for raising the level of coal ash according to claim 1 or 2, further comprising: a scattering suppressant spraying step of spraying a scattering suppressant onto the leveled coal ash slurry whose moisture content was measured in the moisture content measurement step when the moisture content measurement result in the moisture content measurement step is less than or equal to a predetermined moisture content.

6. The method for increasing the volume of coal ash according to claim 5, wherein the predetermined moisture content is set to 6% to 15%.

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