粉矿的危害

Annexure-4 附件- 4Please indicate the preventive measures for the following problems:请给出避免以下问题的措施：Th

Annexure-4 附件 -4 Pleaseindicatethepreventivemeasuresforthefollowingproblems: 请给出避免以下问题的措施： 1. Thereisalwayspositivepressurebuildupinsidethereactionvesselofthesubmerged arcfurnaceduetothegasgeneratedasaresultofchemicalreactions.Fineschokethe furnaceandreducetheporosityoftheburdenwhichresultsineruptionoftheliquidand coldcharge.Eruptionresultsindamagetothelowerelectrodeequipmentsofthe furnaceandmayresultintothefatalinjuriestotheworkmenworkingclosetothe furnacerimlevel.Onceheavyeruptiontakesplaceduetodisturbanceofthedifferent zonesofthefurnaceithastobeswitchedofforloadofthefurnacehastobereduced andittakestimetoagaingetbacktothemaximumoperatingload.Alltheseultimately hampertheproductivityofthefurnace. 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. DuetoimpropersmeltingandlowporosityoftheburdenSlaggenerationwillbehigher incomparisontothecaseofagglomeratedfeedandasaresultspecificpower consumptionwillalsobehigher. 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. Chromeorefinesreacheslowerlevelsinthehearthmuchfasterthancomparedto lumpyoragglomeratedones.Thefinesthatreachlowerlevelaretappedoutwithslag andescapesthroughtapholeunreacted.Inadditionthehindrancetothemovementof furnacegasesaffectsthereductionrate.Thus,totalchromiumrecoveryinmetalwillbe reducedandlossestoslagwillincrease. 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. Directcontactofunreducedchromeorefineswithliquidmetalmayresultinerosionof thecarbonliningpresentinthehearthofthefurnace. 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。