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高磷鲕状赤铁矿中磷矿物的还原焙烧行为及铁磷分离技术的中期报告 摘要: 高磷鲕状赤铁矿中的磷矿物具有很高的磷含量,但目前存在分离效率低、尾矿难以处理等问题,限制了其工业应用。本文采用还原焙烧-酸浸分离的方法,系统研究了高磷鲕状赤铁矿中磷矿物的还原焙烧行为及铁磷分离技术。研究结果表明,高磷鲕状赤铁矿中的磷主要以草酸铁矿物、磷灰石和含磷铁矿物形式存在,并且磷灰石和含磷铁矿物的还原焙烧性能相对较好。在还原焙烧过程中,磷灰石和含磷铁矿物可以很好地被还原,磷主要以气态P2O5的形式释放出来。而草酸铁矿物的磷则较难被还原,在焙烧过程中主要以沉积物的形式固定在矿物中。通过对还原焙烧后物料的矿物学分析和磷的分析,发现还原焙烧温度、时间、还原剂种类和用量等因素均会影响磷的释放和分离效果。在最优化的还原焙烧条件下,可将高磷鲕状赤铁矿中的磷矿物的磷含量从原来的29.71%提高到63.42%。同时,采用酸浸分离技术,可将铁和磷分离,得到高纯度的铁和磷产品。 关键词:高磷鲕状赤铁矿;磷矿物;还原焙烧;铁磷分离。 中文翻译: Thereductionroastingbehaviorofphosphorusmineralsinhigh-phosphorusoolitichematiteandtheiron-phosphorusseparationtechnologyinthemiddleofthereport. Abstract: Thephosphorusmineralsinhigh-phosphorusoolitichematitehaveahighphosphoruscontent,buttherearecurrentlyproblemssuchaslowseparationefficiencyanddifficulttailingstreatment,whichrestrictsitsindustrialapplication.Thispaperusesthereductionroasting-acidleachingseparationmethodtosystematicallystudythereductionroastingbehaviorofphosphorusmineralsinhigh-phosphorusoolitichematiteandtheiron-phosphorusseparationtechnology.Theresearchresultsshowthatphosphorusinhigh-phosphorusoolitichematitemainlyexistsintheformofoxycarbonateminerals,apatite,andphosphorus-containingironminerals,andthereductionroastingperformanceofapatiteandphosphorus-containingironmineralsisrelativelygood.Duringthereductionroastingprocess,apatiteandphosphorus-containingironmineralscanbewellreduced,andphosphorusismainlyreleasedintheformofgaseousP2O5.Thephosphorusofoxycarbonatemineralsismoredifficulttobereducedandismainlyfixedinthemineralsintheformofsedimentduringroasting.Throughmineralogicalanalysisofreducedroastedmaterialsandphosphorusanalysis,itwasfoundthatfactorssuchasreductionroastingtemperature,time,reducingagenttypeandquantitywouldaffectthereleaseofphosphorusandseparationeffect.Undertheoptimizedreductionroastingconditions,thephosphoruscontentofphosphorusmineralsinhigh-phosphorusoolitichematitecanbeincreasedfromtheoriginal29.71%to63.42%.Atthesametime,usingacidleachingseparationtechnology,ironandphosphoruscanbesepa