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Fire coal ash backfill material as well as preparation method and application thereof
The invention provides a fire coal ash backfill material and a preparation method and application thereof, and belongs to the technical field of solid waste utilization. The fire coal ash backfill material is prepared from the following raw materials in parts by weight: 86-94 parts of fire coal ash, 1-5 parts of sodium thiosulfate, 5-9 parts of humic acid and 10-20 parts of deionized water. Wherein the pH value of the lixivium of the fire coal ash is larger than 9.0, the content of Ca ions is 50-1000 mg/L, and the content of Se elements is 0.1-0.5 mg/L. The solid backfill material containing certain moisture is formed by adopting the fire coal ash, the humic acid, the sodium thiosulfate and the water, the synergistic effect of the fire coal ash and the humic acid is utilized, the pH value of the high-alkali fire coal ash is modified to 6.0-9.0, Se is smaller than or equal to 0.1 mg/L, and the requirements of class I solid waste materials in GB18599-2020 are met.
本发明提供了一种燃煤灰渣回填材料及其制备方法与应用，属于固废利用技术领域。以重量份计，采用包括如下组份的原料制备所述燃煤灰渣回填材料：燃煤灰渣86‑94份，硫代硫酸钠1‑5份，腐殖酸5‑9份，去离子水10‑20份；其中，所述燃煤灰渣的浸出液的pH值＞9.0，Ca离子含量为50‑1000mg/L，Se元素含量为0.1‑0.5mg/L。本发明中采用燃煤灰渣、腐殖酸、硫代硫酸钠和水形成含有一定水分的固体回填材料，利用燃煤灰渣和腐殖酸的协同作用，基于高碱燃煤灰渣pH值改性到6.0‑9.0，Se≤0.1mg/L，满足GB18599‑2020中Ⅰ类固废材料的要求。
Fire coal ash backfill material as well as preparation method and application thereof
The invention provides a fire coal ash backfill material and a preparation method and application thereof, and belongs to the technical field of solid waste utilization. The fire coal ash backfill material is prepared from the following raw materials in parts by weight: 86-94 parts of fire coal ash, 1-5 parts of sodium thiosulfate, 5-9 parts of humic acid and 10-20 parts of deionized water. Wherein the pH value of the lixivium of the fire coal ash is larger than 9.0, the content of Ca ions is 50-1000 mg/L, and the content of Se elements is 0.1-0.5 mg/L. The solid backfill material containing certain moisture is formed by adopting the fire coal ash, the humic acid, the sodium thiosulfate and the water, the synergistic effect of the fire coal ash and the humic acid is utilized, the pH value of the high-alkali fire coal ash is modified to 6.0-9.0, Se is smaller than or equal to 0.1 mg/L, and the requirements of class I solid waste materials in GB18599-2020 are met.
本发明提供了一种燃煤灰渣回填材料及其制备方法与应用，属于固废利用技术领域。以重量份计，采用包括如下组份的原料制备所述燃煤灰渣回填材料：燃煤灰渣86‑94份，硫代硫酸钠1‑5份，腐殖酸5‑9份，去离子水10‑20份；其中，所述燃煤灰渣的浸出液的pH值＞9.0，Ca离子含量为50‑1000mg/L，Se元素含量为0.1‑0.5mg/L。本发明中采用燃煤灰渣、腐殖酸、硫代硫酸钠和水形成含有一定水分的固体回填材料，利用燃煤灰渣和腐殖酸的协同作用，基于高碱燃煤灰渣pH值改性到6.0‑9.0，Se≤0.1mg/L，满足GB18599‑2020中Ⅰ类固废材料的要求。
Fire coal ash backfill material as well as preparation method and application thereof
一种燃煤灰渣回填材料及其制备方法与应用
MA NING (author) / DONG YANG (author) / JIA JIANHUI (author)
2024-12-13
Patent
Electronic Resource
Chinese
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