针对钒钛磁铁精矿烧结强度差、返矿率高而影响产量、增加烧结加工费的实际问题，采取优化配料与工艺参数控制，改进工艺设备，实施环冷机雾化水冷却、松料器通压缩空气新技术，提高了烧结矿强度；同时，优化成品系统运行，对成品矿运输与筛分系统进行技术改造，降低烧结矿转运落差，减轻冲击、摔打、粉化；缩小高炉槽下筛子筛孔间隙，取消部分球团过筛，高炉回收使用返矿中大于5 mm 粒级的小烧结矿，改进回收系统等。采取这些措施减少了返矿量，降低返矿率2.03%，增加烧结矿产量24.67万 t。
Aiming at the actual problem that low strength and high return fines ratio result in low yield and high pro-cessing expenses during vanadium-titanium magnetite concentrates sintering,the sinter strength have been improved by optimizing ore blends and processing parameters,improving equipments performance,developing atomization cooling of rotary cooler and adopting compressed air in loosing bars.In the meantime,the operation of finished product system has been optimized and the transportation and sieve systems have been reconstructed to decrease sin-ter falling height and lighten impact,beat,and pulverization of sinter.By increasing mesh of sieve under blast fur-nace chute,canceling screening parts of pellets,recycling and charging return fines of size above 5 mm into blast fur-nace,ameliorating recovery system,etc.,the return fines amount has been reduced so that return fines rate is lower than 2.03%,and sinter output is increased to 246.700 kt.
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