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目前,国内许多255m~3高炉贮矿槽槽下供料系统已经进行了技术改造,将原有的称量车改为带式输送机供料。杭钢、马钢二铁厂4号高炉还将烧结矿和球团矿在槽下再次进行筛分,并采用固定称量漏斗分散称量,对称量值进行误差补正。马钢一铁厂等还使用了焦炭中子测水进行焦炭水分补正。这些技术措施取得了较高的经济效益。仅烧结矿槽下过筛,每减少入炉烧结矿中小于5mm的粉末10%,就可降低焦比1.6%,提高冶炼强度6%,提高产量7.6%。马钢二铁厂2号高炉应用微型计算机进行称量误差补正后,平均每班累计焦炭误差仅100kg,矿石 相似文献
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安钢在原2 55m^3高炉扩容改造供料系统设计中,增加槽下筛分设备、烧结矿集中筛分、集中称量、皮带运输。槽下闸门、翻板改为液压传动,称量改为电子秤,配备微机控制,实现称量自动补偿和自动打印。改造后烧结矿含粉率降至6%,系统供料能力大幅度提高,高炉年平均利用系数可超过2.6,系统运行稳定可靠,设备故障年休风率为0.34%。 相似文献
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以沙钢5800m3高炉、马钢3200m3高炉、某3200m3高炉A、某3200m3高炉B、龙钢3号和4号1800m3高炉、晋南钢铁一期1号和2号1860m3高炉、某高炉C/D/E/F、某2×2950m3高炉G和H八个工程为案例,从炉料结构、矿焦槽数量及贮存时间、系统作业率及正常料批重时的供料能力、矿焦槽平面布置、矿焦槽占地面积、原燃料筛分及称量、焦丁回收和矿丁回收的布置方式、槽下皮带机的选用和设计原则、上料系统是采用皮带机上料还是料车上料的方式等方面,阐述了高炉紧凑式矿焦槽技术的特点及发展趋势。 相似文献
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本文提出了利用风力进行烧结矿筛分的设想。在高炉矿槽下利用一套新型设备,既解决烧结矿筛分问题,同时又解决除尘、环保等问题。通过试验装置上和槽下现场的试验,证实此设想完全可行,在槽下现场取得了一次过筛达到56%的筛分效率,基本上工作环境无污染。经过方差分析,找到了影响效率的主要因素。此法具有设备简单、筛分能力大等一系列优点。它不仅可以用来筛分烧结矿,亦能筛分烧结矿用的焦粉、石灰石粉,在有筛分工序的其他行业也可使用。加强研究,可望为筛分工艺闯出一条新路。 相似文献
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分析了高炉槽下供料工艺发展的趋势,指出了常规称量控制算法的不足。为提高控制精度,简化操作流程,提出了一整套优化控制算法——根据无分散称量时的焦炭称量特性提出“双提前量”控制算法并针对焦炭称量的称底值和提前量构建了自修正算法;构建了主、辅矿两侧实际放料值获取算法,并对设定值和误差采用按批分配的方式,同时对供料速度进行了优化。该算法在华菱涟源钢铁公司3200m^3高炉和南京钢铁联合公司2000m^3高炉应用后,取得了良好的控制效果。 相似文献
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武钢4号高炉大修,在高炉采用一系列先进设备和先进技术的同时,重视原料系统配套改造,将3、8、9号矿槽改造加振动筛,筛除入炉烧结矿粉末,改善料柱透气性,保障高炉顺行,节焦增铁。 相似文献
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In tests at OAO Chelyabinskii Metallurgicheskii Kombinat, up to 40% AMSSh anthracite has been included in the solid fuel for sinter production. That offers a means of compensating for the shortage of coke fines in sinter production, without additional expense and without loss in sinter quality. 相似文献
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《钢铁冶炼》2013,40(3):222-229
AbstractTwo measures for coke saving and increase in blast furnace efficiency related to coke characteristics – reactivity and size – are discussed in this paper. Modern blast furnace operation with low coke rate and high injection rate causes a change in coke quality requirements. A discussion has arisen recently about highly reactive coke. Here, a theoretical analysis of influence of coke reactivity on the thermal reserve zone, direct reduction and carbon consumption in the blast furnace has been undertaken. Experiments have been performed using non-standard test scenarios that simulate coke behaviour under real blast furnace operating conditions. Coke reactivity and microstructure have also been investigated under the impact of alkali and pulverised coal ash and char. Operation of many blast furnaces has proved the possibility of coke saving and increase in productivity when using small-sized coke (so-called nut coke) mixed with the burden, but the reasons for this phenomenon, and consequently the limit for nut coke consumption, are still not very clear. An analytical method and cold model simulations have been used to quantify the change in shaft permeability and furnace productivity when using nut coke. 相似文献
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The mathematical model of minimum safety factor that investigated the collapse trends of coke layer under different charging parameters was established firstly on the basis of the slope stabilization theory in soil mechanics, and then the model of burden profile after coke collapse was improved by adopting the predetermination of quadratic curve and energy correction methods. The research will provide theoretical evidences for describing the coke profile more accurately and technical direction for choosing suitable charging parameters of blast furnace. The results show that: it is helpful to improve the stability of coke layer with increasing chute inclining angle and length of the coke flat; when the main falling point of ore moves toward furnace wall or the coke flat is wider, the curve radian of burden profile after coke collapse becomes smaller; the ore to coke ratio distribution agrees with the gas top temperature measurement well under considering coke collapse comparing with the result of ignoring coke collapse. 相似文献