Solid-waste-based porous material, preparation and method for ecological restoration of coal gangue mountain
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A technology of porous materials and coal gangue, applied in the preparation of organic fertilizers, botanical equipment and methods, fertilization methods, etc., can solve problems such as difficult ecosystems, difficult growth of fungi, unfavorable plant growth, etc., and improve soil structure , Saving natural repair materials and avoiding pollution
Active Publication Date: 2021-06-04
SHANXI UNIV +1
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In actual operation, it is difficult for fungi to continue to grow, and it is difficult for the entire substrate to actively form a good ecosystem, which is not conducive to plant growth
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[0023] A preparation method of a solid waste-based porous material, specifically: adding coal gangue powder, fly ash, cement, desulfurized gypsum, and lime to a granulator or a sieving machine, adding a foaming agent to the water, and Water is sprayed several times, and granules of 1-8 mm are made in a granulator or a sieving machine, and solid waste-based porous materials are obtained after flue gas curing. Boiler flue gas contains carbon dioxide, sulfur dioxide, nitrogen dioxide and other acidic gases, which can be used to maintain and neutralize the alkaline substances in the material, so that the pH value of the porous granular material produced can be reduced to neutral. The temperature of the granulator or sieve is 30-50°C; the flue gas curing is specifically: the boiler flue gas and steam with a temperature above 200°C enter the curing device, and the curing temperature of the boiler flue gas and steam is 160- 200℃, the curing time is 2-6h.
[0024] A method for using ...
Embodiment 1
[0032] Embodiment 1 solid waste base porous material
[0033]60% coal gangue powder, 20% fly ash, 5% cement, 2.5% desulfurized gypsum, 12.5% lime, 0.7‰ foaming agent, 0.65 liquid-solid ratio. Foam molding for 6 hours, transfer to 160°C boiler flue gas curing for 4 hours, after drying, crush and sieve to obtain 1-8mm particles.
Embodiment 2
[0034] Example 2 solid waste based porous material
[0035] 50% of coal gangue, 30% of fly ash, 15% of cement, and 5% of desulfurized gypsum are mixed and added to the granulator, and foaming agent 1.5‰ is added to the water, and sprayed into the granulator several times according to the liquid-solid ratio of 18%. In the process, 3-8mm particles were made, and the foaming was stopped at 50°C for 6 hours, and then cured at 160°C for 6 hours to obtain non-fired porous particle materials.
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Abstract
The invention relates to the field of ecological restoration of coal gangue hills, in particular to a solid waste-based porous material, preparation and an ecological restoration method for the coal gangue hills. The method comprises the steps: mixing a coal-based solid waste restoration material and a mycorrhizal fungus solid fungicide to restore the coal gangue hills, wherein the coal-based solid waste repairing material is prepared by mixing a coal-based solid waste porous material, low-rank coal and waste organic matters, adding a microbial quick decomposition agent, performing aerobic fermentation and performing precipitation; the solid mycorrhizal fungi are loaded on the solid waste-based porous material, so the activity of the solid mycorrhizal fungi can be kept for a long time, and the solid mycorrhizal fungi are more convenient to store compared with liquid fungicide; the porous material provides a safe and appropriate growth space for mycorrhizal fungus hyphae; the substances secreted by the mycorrhizal fungi can influence the performance of the porous material, and can strengthen the action of the porous material and soil particles, thereby having potential to promote the formation of a soil aggregate taking the porous material as a core. Through the structure-function relationship between the coal-based solid waste porous carrier material and the activity of mycorrhizal fungi, the growth of mycorrhizal fungi and the rooting of plants are promoted, and the ecological restoration of the ecologically fragile area of the coal-electricity base is realized.
Description
technical field [0001] The invention relates to the field of ecological restoration of coal gangue hills, and more specifically relates to a solid waste-based porous material, its preparation and a method for ecological restoration of coal gangue hills. Background technique [0002] With the rapid development of my country's mining industry, a large amount of tailings waste has been produced. The treatment and disposal of these waste residues are generally stored in the form of tailings ponds, which not only occupy a large amount of land, but also pollute soil, groundwater and surface water through acidification and rainfall leaching. In the prior art, the ecological restoration technology of coal gangue hills mainly adopts the combination of soil matrix construction technology and vegetation planting technology. The soil matrix construction technology is to cover the surface of the coal gangue hill with soil, so that the soil surface of the coal gangue hill forms a soil ma...
Claims
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Application Information
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