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Annexure-4附件-4Pleaseindicatethepreventivemeasuresforthefollowingproblems:请给出避免以下问题的措施:1.Thereisalwayspositivepressurebuildupinsidethereactionvesselofthesubmergedarcfurnaceduetothegasgeneratedasaresultofchemicalreactions.Fineschokethefurnaceandreducetheporosityoftheburdenwhichresultsineruptionoftheliquidandcoldcharge.Eruptionresultsindamagetothelowerelectrodeequipmentsofthefurnaceandmayresultintothefatalinjuriestotheworkmenworkingclosetothefurnacerimlevel.Onceheavyeruptiontakesplaceduetodisturbanceofthedifferentzonesofthefurnaceithastobeswitchedofforloadofthefurnacehastobereducedandittakestimetoagaingetbacktothemaximumoperatingload.Alltheseultimatelyhampertheproductivityofthefurnace.由于化学反应产生的气体总是使矿热炉反应容器中产生正压。粉矿阻塞电炉并减少炉料的空隙,这会导致液体炉料和冷料的喷发。喷发会对下电极设备造成损害,并且可能对电炉边缘工作的工人带来致命伤害。一旦由于电炉不同区域的干扰而发生严重喷发,必须立即断电或减少电炉负荷,而且重新回到最大操作负荷需要很长一段时间。所有这些将会导致电炉产量减少。2.DuetoimpropersmeltingandlowporosityoftheburdenSlaggenerationwillbehigherincomparisontothecaseofagglomeratedfeedandasaresultspecificpowerconsumptionwillalsobehigher.由于不正确的冶炼和给料低孔隙,与烧结炉料相比,产生更多的炉渣,也导致其具体能量的消耗升高。3.Chromeorefinesreacheslowerlevelsinthehearthmuchfasterthancomparedtolumpyoragglomeratedones.Thefinesthatreachlowerlevelaretappedoutwithslagandescapesthroughtapholeunreacted.Inadditionthehindrancetothemovementoffurnacegasesaffectsthereductionrate.Thus,totalchromiumrecoveryinmetalwillbereducedandlossestoslagwillincrease.与块矿相比,铬矿精粉在炉体内位置较低。位置较低的精粉和渣子一起出铁,可能会未经反应就从出铁口流出。另外,炉气运动的阻碍会影响还原率。因此,金属中铬总还原率将降低,炉渣中铬的损失将会升高。4.Directcontactofunreducedchromeorefineswithliquidmetalmayresultinerosionofthecarbonliningpresentinthehearthofthefurnace.未还原的铬矿精粉与液体金属的直接接触将导致,电炉内炉底碳内衬的腐蚀。
本文标题:粉矿的危害
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