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- W4282016492 abstract "Abstract Brown corundum dust ash(BCFA) is an industrial solid waste from the brown corundum production process. The alkali metal is a key factor limiting its comprehensive use. Currently, BCFA is mainly stockpiled and occupies a large amount of land. Its fine particles are easy to cause air pollution. The addition of NH 4 HSO 4 allows for the effective extraction of K from BCFA and the efficient use of BCFA. Under optimum conditions: NH 4 HSO 4 to BCFA mass ratio of 1.2:1, the roasting temperature of 240 °C, roasting time of 2 h, water leaching time of 90 min, water leaching temperature of 65 °C water leaching liquid to solid ratio of 3:1, the leaching rate of K from BCFA reached 97%. The leachate was crystallised by evaporation to obtain K, N compound fertiliser for agricultural use. The leaching residue is mainly Al and Si, which can be used for the preparation of refractory materials, aluminium and silicon molecular sieves, construction materials and other raw materials." @default.
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- W4282016492 date "2022-06-01" @default.
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- W4282016492 title "Recovery of K by NH<sub>4</sub>HSO<sub>4</sub> low-temperature roasting from brown corundum Fly Ash" @default.
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- W4282016492 doi "https://doi.org/10.1088/2053-1591/ac74a7" @default.
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