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在平炉装料中采用碎矿会导致熔化时间的延长和这个时期内从炉中喷出金属和炉渣,此外还增加装料时间内由废气带走的碎矿颗粒,从而加速沉渣室的填满和格子砖的堵塞。为此,必须把细碎的原矿与溶剂配合成团矿(造块),才能保证氧化铁和石灰紧密的接触,以便于造渣和在熔化前期得到高碱度炉渣,并具有足够含量的氧化铁。虽然在苏联好几个钢厂内使用氧化和自熔性的烧结矿以及矿石～石灰石团矿的实验效果都良好,但平炉用团块物料的成批生
The use of crushing in open hearth charging leads to an extended melting time and the discharge of metal and slag from the furnace during this period, in addition to the addition of crushed ore particles taken off by the exhaust gas during loading time, thereby accelerating the filling of the sediment chamber And checkerboard blockage. To this end, the fine ore and solvent must be combined into a group (block) in order to ensure close contact between the iron oxide and the lime, in order to facilitate slagging and high alkalinity slag in the pre-melting stage, with a sufficient content of iron oxide . Although experiments using oxidized and self-fusible sinters and ore to limestone mines in several mills in the USSR have shown good results, batch furnaces