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Method for preparing gangue-based filling material through coal gangue activation and CO2 mineralization, gangue-based filling material and application of gangue-based filling material
The invention provides a method for preparing a gangue-based filling material through coal gangue activation and CO2 mineralization, the gangue-based filling material and application of the gangue-based filling material, and relates to the technical field of solid waste treatment. The method comprises the following steps: carrying out anaerobic pyrolysis on coal gangue to obtain combustible gas and devolatilized gangue; carrying out isothermal self-heating activation on the devolatilized gangue in the presence of combustible gas to obtain flue gas and an activation product; performing contact desulfurization on the flue gas and limestone slurry to obtain purified flue gas and desulfurized gypsum; cO2 in the purified flue gas is captured through a CO2 adsorbent, and CO2 is obtained; mixing and crushing the activated product and desulfurized gypsum to obtain an active powder admixture; mixing the active powder admixture, red mud, cement and water, and introducing CO2 to obtain mixed slurry; and the mixed slurry is subjected to pouring forming and curing in sequence, and the gangue-based filling material is obtained. According to the method, the problems that the mineralized gel material is loose in mass, easy to settle and lose and low in filling strength are solved.
本发明提供了一种煤矸石活化‑CO2矿化制备矸石基充填材料的方法、矸石基充填材料及其应用，涉及固废处理技术领域。所述方法包括以下步骤：将煤矸石绝氧热解，得到可燃气体和脱挥发分矸石；将脱挥发分矸石在可燃气体的存在下等温自热活化，得到烟气和活化产物；将烟气与石灰石浆液接触脱硫，得到净化烟气和脱硫石膏；通过CO2吸附剂对净化烟气中的CO2捕集，得到CO2；将活化产物和脱硫石膏混合粉碎，得到活性粉末掺合料；将活性粉末掺合料、赤泥、水泥和水混合并通入CO2，得到混合料浆；将混合料浆依次浇筑成型和养护，得到矸石基充填材料。所述方法解决了矿化凝胶材料质量松散，容易出现沉降和流失，以及填充强度低的问题。
Method for preparing gangue-based filling material through coal gangue activation and CO2 mineralization, gangue-based filling material and application of gangue-based filling material
The invention provides a method for preparing a gangue-based filling material through coal gangue activation and CO2 mineralization, the gangue-based filling material and application of the gangue-based filling material, and relates to the technical field of solid waste treatment. The method comprises the following steps: carrying out anaerobic pyrolysis on coal gangue to obtain combustible gas and devolatilized gangue; carrying out isothermal self-heating activation on the devolatilized gangue in the presence of combustible gas to obtain flue gas and an activation product; performing contact desulfurization on the flue gas and limestone slurry to obtain purified flue gas and desulfurized gypsum; cO2 in the purified flue gas is captured through a CO2 adsorbent, and CO2 is obtained; mixing and crushing the activated product and desulfurized gypsum to obtain an active powder admixture; mixing the active powder admixture, red mud, cement and water, and introducing CO2 to obtain mixed slurry; and the mixed slurry is subjected to pouring forming and curing in sequence, and the gangue-based filling material is obtained. According to the method, the problems that the mineralized gel material is loose in mass, easy to settle and lose and low in filling strength are solved.
本发明提供了一种煤矸石活化‑CO2矿化制备矸石基充填材料的方法、矸石基充填材料及其应用，涉及固废处理技术领域。所述方法包括以下步骤：将煤矸石绝氧热解，得到可燃气体和脱挥发分矸石；将脱挥发分矸石在可燃气体的存在下等温自热活化，得到烟气和活化产物；将烟气与石灰石浆液接触脱硫，得到净化烟气和脱硫石膏；通过CO2吸附剂对净化烟气中的CO2捕集，得到CO2；将活化产物和脱硫石膏混合粉碎，得到活性粉末掺合料；将活性粉末掺合料、赤泥、水泥和水混合并通入CO2，得到混合料浆；将混合料浆依次浇筑成型和养护，得到矸石基充填材料。所述方法解决了矿化凝胶材料质量松散，容易出现沉降和流失，以及填充强度低的问题。
Method for preparing gangue-based filling material through coal gangue activation and CO2 mineralization, gangue-based filling material and application of gangue-based filling material
一种煤矸石活化-CO2矿化制备矸石基充填材料的方法、矸石基充填材料及其应用
ZHAO HEXIANG (author) / WANG JIANJUN (author) / HE XINPING (author) / WANG HONGWEI (author) / LUO CAIPING (author) / FANG XIANZHUO (author) / LIU YANJUN (author) / SUN ZIQIANG (author) / WANG XUAN (author) / CHEN SHOUWEI (author)
2024-10-29
Patent
Electronic Resource
Chinese
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