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A kind of dolomitic mudstone newly found in North China has high amounts of K2O up to 10wB% in average, and potassium reserve is at superior scale. Mineral assemblage of the potassium ore indicates a specific and complicated geological environment under which the po-tassium deposit formed. Modal analysis of the potassium host rock shows that the principal min-erals in the ore include microcline, dolomite, and clay minerals such as illite, illite/smectite mixed layer, and kaolinite, attributable to a new type of insoluble potassium deposits in ore genesis. The experiments in this research demonstrated that with sodium carbonate as flux agent, the potas-sium ore could be decomposed with a proportion as high as 99.4% by calcinations at moderate temperature for no more than 1.5―2.0 h; more than 70% of K2O in the calcined materials were leached into the liquor, and by acidification reaction of the filter liquor, a large amount of impuri-ties such as Fe3+, Ti4+, Mn2+, Mg2+, and Ca2+ were removed with precipitation of alumino-silicious colloid residue, which makes it possible to prepare potassium carbonate of electronic grade from the filter liquor, whereas the alumino-silicious residue could be utilized to make mineral polymer, a new type of inorganic construction structural materials. The current research shows that in-dustrial exploitation and comprehensive utilization of this new type of insoluble potassium re-source are feasible both in economic benefits and environmental kindness with the fairly clean production process as sketched in this paper.
A kind of dolomitic mudstone newly found in North China has high amounts of K2O up to 10wB% in average, and potassium reserve is at superior scale. Mineral assemblage of the potassium ore that a specific and complicated geological environment under which the po-tassium deposit Modal analysis of the potassium host rock shows that the principal min-erals in the ore include microcline, dolomite, and clay minerals such as illite, illite / smectite mixed layer, and kaolinite, attributable to a new type of insoluble potassium deposits in ore genesis. The experiments in this research with this sodium carbonate as flux agent, the potas-sium ore could be decomposed with a proportion as high as 99.4% by calcinations at moderate temperature for no more than 1.5-2.0 h; more than 70 % of K2O in the calcined materials were leached into the liquor, and by acidification reaction of the filter liquor, a large amount of ions-ties such as Fe3 +, Ti4 +, Mn2 +, Mg2 +, and Ca2 + were emoved with precipitation of alumino-silicious colloid residue, which makes it possible to prepare potassium carbonate of electronic grade from the filter liquor, while the alumino-silicious residue could be utilized to make mineral polymer, a new type of inorganic construction structural materials. current research shows that in-dustrial exploitation and comprehensive utilization of this new type of insoluble potassium re-source are feasible both in economic benefits and environmental kindness with the fairly clean production process as sketched in this paper.