Invention Grant
US09327233B2 Method of beneficiating and drying trona ore useful for flue gas desulfurization 有权
用于烟气脱硫的天然碱矿选矿干燥方法

Method of beneficiating and drying trona ore useful for flue gas desulfurization
Abstract:
A method of producing trona suitable for flue gas desulfurization comprising mechanically mining a trona ore deposit containing insoluble impurities; crushing the mined trona ore to create a mixture of uncalcined trona-rich particles and impurities-rich particles; beneficiating the crushed uncalcined trona ore to obtain a trona-rich, impurities-depleted ore fraction; and drying the trona-rich ore fraction under non-calcining conditions to yield a dry uncalcined trona ore. A preferred embodiment includes concurrently milling and drying the trona-rich, impurities-depleted ore fraction to recover a low moisture content trona product having a high NaHCO3:Na2CO3 ratio, useful for the efficient dry injection desulfurization of flue gas streams.
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