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以高炉炼铁和高炉冶金焦炭的供应为主线,重点探讨了西欧钢铁行业的发展过程。文章对诸如铁水生产、高炉还原剂结构的发展、焦炭需求、焦炭质量要求以及焦炭生产等重点技术问题进行了介绍。西欧联合钢厂的现代化装备能够产出多个品种的优质钢材。高炉—转炉流程仍将是钢铁生产的主流工艺,因此焦炭业也将必不可少。还介绍了两种减少二氧化碳排放的炼铁新工艺。 相似文献
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吕翠花 《冶金设备管理与维修》2014,(2):52-53
铁水罐周转效率和维修质量直接关系到高炉和转炉生产的持续稳定,通过改造和运行的优化,保证了铁水罐的维修质量和周转效率,满足了不断强化的高炉冶炼需求. 相似文献
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高炉炉缸铁水流场数值模拟 总被引:1,自引:0,他引:1
铁水环流是造成炉缸"蒜头状"侵蚀的主要原因,而导致铁水环流行程主要是由于炉缸内的死料柱引起的。为此,以流体力学有关理论为基础,建立了炉缸炉底三维流体数学模型,应用FLUENT软件,研究了高炉炉缸中不同死料柱位置、状态及出铁口尺寸对炉缸内铁水流动的影响。结果表明:死料柱有较小的浮起时造成炉底铁水流量较大对炉底产生较强的侵蚀。当中心死料柱尺寸大时自由铁水区的铁水流速较快,反之较慢。当出铁口直径增大时,铁水的质量流量增大,炉缸底部的铁水环流明显增大。 相似文献
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在铁钢界面现有模式下的铁水运输过程中,由于铁水包运行周期及保温效果不够理想,导致在高炉接铁时铁包耐材温度低,热状态差,使得铁水在铁水包内的热量损失较大.减小铁水温降能有效防止铁水包结壳结瘤,降低离线烘烤频率,间接提高铁水包周转率;同时在转炉冶炼过程中,低温铁水将严重影响废钢的加入量和吹氧等操作.由此可见,铁水温度控制是钢铁企业节能降耗和高效有序生产的关键因素之一.为了减小铁水温降,本文建立了多种不同保温措施情况下的铁水包传热模型,通过fluent软件对各模型在不同空包时间情况下的温度场进行数值计算,分析不同保温措施及空包时间下热状态对铁水温降的影响规律.分析结果表明:无保温措施的情况下空包时间由5 h缩短至3 h能降低下一周期铁水温降2.2 K·h-1;空包阶段最合理的保温措施为增设6 mm左右绝热层并加包盖,能提高工作层平均温度约155 K,在空包3~5 h内能减小铁水温降3.4~3.7 K·h-1.该结论为铁水包空包阶段采取合理保温措施及不同保温情况下空包运行时间控制提供了理论指导. 相似文献
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根据钒钛磁铁矿的冶金特性及大型高炉冶炼含钒铁水的特点,分析了攀钢高炉含钒铁水成分对铁水在线脱硫,含钒铁水提钒炼钢的影响,建议在充分发挥钒钛磁铁矿冶炼流程中各个工艺环节的作用的基础上,通过试验研究,使高炉含钒铁水成分达到最佳化,从而使整个冶炼工艺取得更大的经济效益。 相似文献
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The models and influencing factors of steel ladles exchange during the steelmaking and continuous casting process of H steel plant were investigated.Based on analysis of the operation process and turnover time of steel ladles, relationship models for the turnover number, turnover rate, continuous casting number, number of ladles with additional turnover, and number of ladles without additional turnover were built.The turnover rules of steel ladles for one basic oxygen furnace (BOF) matching one continuous caster (CC) and two BOFs matching two CCs modes were simulated by using a Gantt chart.The models of steel ladle exchange were proposed for casting of a single CC and overlapping casting of two CCs.By analyzing the influencing factors, the following conclusions were drawn.The exchange ladle should not have the task of transporting liquid steel in the CC that stops casting earli-er.The end time of the empty ladle in the CC that stops casting earlier should be earlier than the start time of the full ladle in the CC that stops casting later.After evaluating the factors influencing the start casting time, turnover cycle, casting time, continuous casting number, and overlapping time, a prioritization scheme of steel ladle exchange was proposed based on the steel grade.First, the turn-over cycle and single heat casting time were determined; based on these, a reasonable ladle turnover number was calculated.Second, the turnover number and continuous casting number were optimized for maximizing the number of ladles without additional turnover.Lastly, to reduce the casting number during the overlapping time to be lower than the turnover number, the overlapping time was shortened. 相似文献
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分析了高炉内硅的来源和硅在高炉内还原的特点,总结了目前国内外高炉低硅冶炼的现状,提出了高炉低硅冶炼的措施。 相似文献
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介绍了沙钢润忠90t竖式电弧炉热装铁水技术改造的情况。为实施铁水热装、解决炉料来源,建设了380m^3高炉,并且电弧炉、钢包炉及连铸机也作了相应改造,实现了增产、降耗、高质的目标。 相似文献
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分析了承钢1#高炉因为采用非通用设计,导致高炉存在操作炉型不稳定、冷却设备寿命短、铁水沟过长、铁损高等不足。介绍了大修中采取接近操作炉型的设计炉型、炉体高温区采用铜冷却壁、炉缸采用优质炭砖+陶瓷杯的砌砖结构、电动平车运输铁水等措施,消除了一代炉役中的不足,取得了较好的技术指标。 相似文献
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Blast furnace operation with hot burden charging was numerically simulated to preliminarily analyze its advantages and disadvantages.Multi-fluid blast furnace model was utilized to simulate hot burden charging operations under the conditions that the charging temperatures of pellet and coke were supposed separately or simultaneously as800℃.The results showed that,with hot burden charging,the furnace top temperature significantly increased in comparison to the conventional operation with cold burden charging.However,in-furnace temperature decreased,which decelerated the reduction rate of ferrous burdens.The concentrations of reducing gases were decreased in the furnace.The height of cohesive zone shifted downwards.When the charging temperatures of pellet and coke were simultaneously 800℃(PC800),coke rate,fuel rate and carbon emission rate were decreased by 13.4,22.1and19.25kg·t-1,respectively.The ratio of ore to coke,solid burden charging rate and hot metal productivity were increased by 4.79%,7.55kg·s-1 and 6.38%,respectively.Heat taken away by top gas and energy consumption per ton hot metal were increased by 68.97%and 6.40%,respectively.Generally speaking,hot burden charging was adverse to energy utilization of blast furnace. 相似文献
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在当前及未来大型高炉高冶炼强度的条件下,加快焦炭在铁水中的溶解速率、提高高炉炉缸铁水的碳饱和度是削弱碳不饱和铁水对炉缸炉衬侵蚀、保证炉缸正常工作及延长高炉寿命的重要措施,同时可以为下游的炼钢工序提供部分热量来源。首先对国内外焦炭在铁水中溶解的试验和模拟研究方法进行了概括,然后对焦炭自身结构性能、焦炭中矿物质、铁水的物理性质等影响焦炭溶解速率的因素进行了详细分析。结果表明,碳结构的有序度和铁水温度的升高有利于焦炭的溶解,而焦炭中矿物质及铁水中硫、磷等元素的存在会抑制铁水的进一步渗碳。研究结果为高炉操作者理解焦炭在铁水中的溶解行为提供借鉴,指导钢铁工业的节能减排。 相似文献
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为了降低京唐高炉燃料消耗,通过对Rist操作线的意义进行阐述,以京唐1号高炉生产参数为依据,计算并绘制了Rist操作线,据此分析了煤气利用率、风温、生铁含碳、金属化率等高炉操作参数改变对燃料比的影响。针对这些影响因素,京唐1号高炉对降低燃料比进行了一系列攻关工作,通过采取强化原燃料管理,提高原燃料质量,为降低燃料消耗创造条件。优化高炉操作,降低热风炉拱顶温度,对热风管系进行改造,提高送风系统的安全性,尽可能提高风温水平;优化装料制度,获得较高的煤气利用率;高风温、富氧,稳定均匀喷吹以提高煤粉置换比。通过对生产攻关实践,首钢京唐1号高炉实现了低燃料比生产,达到490kg/t。 相似文献
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对宝钢高炉炉前铁水预脱硅技术进行了总结分析。根据现场实际生产数据及操作经验,重点分析了影响脱硅效果和泡沫渣的诸多因素,并通过采取一系列改进措施,使高炉炉前脱硅取得了很大的进步,为炼钢冶炼低磷低硫精品钢提供了优质低硅铁水。 相似文献
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针对某炼钢厂生产流程建立钢包周转过程仿真模型,对影响钢包周转率的热修时间、生产钢种和修包包龄等因素进行仿真研究.仿真结果表明:热修时间增加,钢包周转率下降,当日产45炉典型钢种,热修时间在0~20 min范围内钢包周转率为6.43,而当热修时间为50~60 min时钢包周转率为5.0;生产不同钢种的钢包周转率差别较大,日产41~50炉的SPHC钢种时,钢包周转率最大值为6.28,最小值为5.63,而生产同样炉数的X70钢种时钢包周转率最大值为5.0,最小值为4.55;修包包龄增加,钢包周转率提高,日产48炉典型钢种,修包包龄为40次时钢包周转率为4.0,修包包龄为45次钢包周转率达极限值6.86. 相似文献