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Method for preparing cementing material from high-iron red mud and comprehensively recovering valuable elements
The invention discloses a method for preparing a cementing material and comprehensively recovering valuable elements from high-iron red mud, which comprises the following steps: S1, adding dried high-iron red mud, quartz sand and fuel into a smelting furnace, introducing oxygen to carry out reduction smelting, reducing iron oxide in the high-iron red mud into molten iron and settling the molten iron at the bottom of the smelting furnace, obtaining smoke from the upper part of the smelting furnace; s2, the high-temperature molten slag is directly subjected to water quenching cooling, so that silicon and aluminum elements are activated, and glassy water-quenched slag is obtained; grinding the water-quenched slag, mixing the ground water-quenched slag with fly ash, then adding an alkaline activator for alkaline excitation, and dissolving out amorphous silicon-aluminum atoms in glass under a stirring condition; s3, pouring the slurry obtained in the step S2 into a mold for curing to obtain the geopolymer. According to the method, resource utilization of the Fe element of the high-iron red mud is achieved through smelting reduction, the water-quenched slag and the alkali-rich smoke dust can be all used for manufacturing geopolymer cementing materials, and the technical problem of full-quality utilization of the high-iron red mud is solved.
本发明公开了一种高铁赤泥制备胶凝材料及有价元素综合回收的方法，包括以下步骤：S1.在熔炼炉内加入干燥后的高铁赤泥、石英砂和燃料，并通入氧气进行还原熔炼，高铁赤泥中的铁氧化物被还原成铁水沉于熔炼炉炉底，上层为高温熔渣层，熔炼炉上部得到烟气；S2.高温熔渣直接水淬冷却，使得硅铝元素被活化，得到玻璃质水淬渣；水淬渣研磨后与粉煤灰进行混合，再加入碱性激发剂进行碱性激发，在搅拌条件下溶出玻璃质中的无定型硅铝原子；S3.将步骤S2得到的浆液倒入模具内进行养护，得到地质聚合物。本发明的方法通过熔融还原实现了高铁赤泥Fe元素的资源化利用，水淬渣及富碱烟尘可全部用于制造地质聚合物胶凝材料，解决了高铁赤泥全质化利用的技术问题。
Method for preparing cementing material from high-iron red mud and comprehensively recovering valuable elements
The invention discloses a method for preparing a cementing material and comprehensively recovering valuable elements from high-iron red mud, which comprises the following steps: S1, adding dried high-iron red mud, quartz sand and fuel into a smelting furnace, introducing oxygen to carry out reduction smelting, reducing iron oxide in the high-iron red mud into molten iron and settling the molten iron at the bottom of the smelting furnace, obtaining smoke from the upper part of the smelting furnace; s2, the high-temperature molten slag is directly subjected to water quenching cooling, so that silicon and aluminum elements are activated, and glassy water-quenched slag is obtained; grinding the water-quenched slag, mixing the ground water-quenched slag with fly ash, then adding an alkaline activator for alkaline excitation, and dissolving out amorphous silicon-aluminum atoms in glass under a stirring condition; s3, pouring the slurry obtained in the step S2 into a mold for curing to obtain the geopolymer. According to the method, resource utilization of the Fe element of the high-iron red mud is achieved through smelting reduction, the water-quenched slag and the alkali-rich smoke dust can be all used for manufacturing geopolymer cementing materials, and the technical problem of full-quality utilization of the high-iron red mud is solved.
本发明公开了一种高铁赤泥制备胶凝材料及有价元素综合回收的方法，包括以下步骤：S1.在熔炼炉内加入干燥后的高铁赤泥、石英砂和燃料，并通入氧气进行还原熔炼，高铁赤泥中的铁氧化物被还原成铁水沉于熔炼炉炉底，上层为高温熔渣层，熔炼炉上部得到烟气；S2.高温熔渣直接水淬冷却，使得硅铝元素被活化，得到玻璃质水淬渣；水淬渣研磨后与粉煤灰进行混合，再加入碱性激发剂进行碱性激发，在搅拌条件下溶出玻璃质中的无定型硅铝原子；S3.将步骤S2得到的浆液倒入模具内进行养护，得到地质聚合物。本发明的方法通过熔融还原实现了高铁赤泥Fe元素的资源化利用，水淬渣及富碱烟尘可全部用于制造地质聚合物胶凝材料，解决了高铁赤泥全质化利用的技术问题。
Method for preparing cementing material from high-iron red mud and comprehensively recovering valuable elements
一种高铁赤泥制备胶凝材料及有价元素综合回收的方法
GUO HUI (author) / BAI TAO (author) / TANG KAILE (author) / ZHANG LERU (author)
2024-03-29
Patent
Electronic Resource
Chinese
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