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改善攀钢钒钛烧结矿低温还原粉化性研究 总被引:1,自引:1,他引:0
本文研究了FeO,MgO及氯化物稀溶液对攀钢钒钛烧结矿低温还原粉化(RDI)的影响,探讨了氯化物稀溶液处理法改善钒钛烧结矿RDI的机理及氯化物对高炉腐蚀的问题。 相似文献
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烧结矿低温还原粉化的研究 总被引:6,自引:0,他引:6
本文阐明了烧结工艺条件、烧结矿微观组织结构与烧结矿低温还原粉化的内在联系和规律。对烧结矿低温还原粉化行为及氧化亚铁的影响,提出了一些新观点。这些观点对指导我国造块工业生产具有重要意义。 相似文献
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赵伯辉 《金属材料与冶金工程》1998,(2):9-11
介绍了湘潭钢采用工业废湘与一定浓度的CaCl2溶液配制喷洒在烧结矿的表面上,通过控制喷洒液的浓度以及吨烧结矿的喷洒量,实现了烧结矿RDI值平均降低56.7%,使高炉产量提高10.50%,降低焦比35.5%kg/t。 相似文献
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本文分析了我司试验和生产应用“烧结矿低温学原粉化控制技术”的情况。通过调试摸索和工业试验表明:此技术工艺简单,操作方便,效果明显,有用后,烧结矿低温还原粉化率可降低约50%,高炉料柱透气性改善,煤气利用率提高,高炉实际节焦6.85kg/t,增产6.02%。 相似文献
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铁矿石烧结矿低温还原粉化理研究 总被引:3,自引:1,他引:2
介绍了无填料环氧树脂浇注干式变压器计算机辅助优化设计软件的特点,给出了数学模型、程序结构和框图,并用计算实例证实了该软件的实用性。 相似文献
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Abstract: Hydrogen-enrich iron making process is certainly to be an effective method to reduce greenhouse gases emission. However, the effect of hydrogen addition on the low temperature metallurgical property of sinter is still unclear. A detailed investigation was performed on the above topic. The results are as follows. When CO is partially replaced by H2, the RDI<315 (RDI<28) of sinter decreases with the increase of the H2 content; when the content of H2 increases, the CO, CO2 and N2 decrease proportionally, in this case, RDI<315 (RDI<28) of sinter increases with the increase of H2 content; the value of RDI<315 (RDI<28) basically depends on the reduction index (Ri).The experimental data of RDI<28 based on Japanese industrial standard (JIS) are a little higher than the data of RDI<315 based on Chinese industrial standard (CIS) in the same condition. In addition, for part of CO is replaced by H2: RDI<28=338394+11585 RDI<315; for other gases, except H2, are decreased proportionally: RDI<28=1739678+042922 RDI<315. 相似文献
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The reduction degradation characteristics of typical sinter, pellet and lump ore were tested with the reducing gas conditions simulating two kinds of iron-making processes. The results show that, in the same condition of gas composition and temperature, the reduction degradation degree (RDI<3.15 mm) of sinter is high, RDI<3.15 mm of lump ore is low and RDI<3.15 mm of pellet is in the middle level. With two kinds of gas composition simulating different iron-making processes, the reduction degradation indices (RDI) of three kinds of iron ores all present the tendency of “inverted V-shape” in the temperature range from 450 to 650 ℃, and the RDI reach the maximum value at 550 ℃. The reduction degradation degrees of iron ores are extended when mixing the gas with hydrogen to increase the reduction potential, and the influence extent is discrepant for different iron ores. Colligating the increase amplitude of grains in small size fraction, the influence of reducing gas on lump ore is the greatest, the influence on sinter is the second, and the sensitivity of pellet on the reducing gas properties change is relatively small. As for the degradation form, lump ore and sinter both present the degradation of cracking, and the distribution of small grains generated from the cracking is in the range from 0.5 to 6.3 mm uniformly. The lump ore presents surface cracking, while sinter presents integral cracking. The pellet presents the degradation of surface stripping, and the proportion of grains smaller than 0.5 mm is the highest, which is up to 90% in the grains smaller than 3.15 mm. 相似文献
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在通过红外微型烧结试验,确定温度、碱度、MgO含量及SiO2含量对包钢低硅烧结矿黏结相强度影响强弱顺序以及黏结相强度最优、较好、较差及最差的包钢低硅烧结工艺条件基础上,采用烧结杯对上述4种烧结矿的黏结相强度进行验证,并对其冶金性能进行研究。结果表明,低硅烧结的最佳工艺条件为:SiO2含量(质量分数,下同)4.0%、碱度2.5、MgO含量1.6%、配碳量3.8%。在此工艺条件下获得的包钢低硅烧结矿具有优良的冷态强度(转鼓强度83.1%),软熔滴落性能(tS为1307.3℃,tD-tS为98℃)优于包钢烧结矿,还原性(RI为83.65%)较好。尽管低温还原粉化性与目前包钢烧结矿相当,但综合评价,包钢低硅烧结矿可以满足高炉炼铁的需求。 相似文献
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通过研究高炉-转炉界面铁水运输过程温度的主要影响因素,确定了影响高炉-转炉界面铁水运输过程温度的参数,建立了基于Levenberg-Marquardt (LM)算法BP神经网络的高炉-转炉界面铁水温度及铁水过程温降的预报模型.用沙钢100包铁水数据进行模型训练,50包铁水数据进行现场预报,结果表明:在高炉-转炉界面“一包到底”模式下,当绝对误差| X |≤20℃时,铁水温度命中率为94%,铁水温降命中率为78%;当绝对误差|X|≤40℃时,铁水温度命中率为100%,铁水温降命中率为92%,该预报模型能够满足现场实际生产需求,对炼钢生产有很好的指导意义. 相似文献
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以炼铁厂常用烧结矿、球团矿以及块矿为研究对象,考察了不同含铁原料在高炉炼铁工艺和COREX非高 炉炼铁工艺2种煤气条件下的低温还原粉化行为。研究结果表明:①铁矿石的结构组成决定了其粉化形式,块矿 和烧结矿的粉化形式均表现为“裂开式”,粉化产生的细小粒级颗粒较均匀地分布于-6.3 mm范围;不同于烧结矿 和块矿,球团矿则属于“剥落式”粉化,粉化产物粒径主要集中在-0.5 mm范围;②在还原气氛和温度相同的情况 下,烧结矿粉化程度最高,球团矿次之,块矿最低;③还原温度对3种含铁炉料的还原粉化程度均具有重要影响,当 还原煤气条件相同时,3种含铁炉料的低温还原粉化指数均在550℃时达到最大值;④COREX炼铁工艺的煤气条 件加剧试验用铁矿石的低温还原粉化程度,但对不同类型铁矿石的影响有所差异,综合粉化产生的细小颗粒的增 幅可知,块矿受其影响程度较大,其次是球团矿,而烧结矿对煤气性质改变的敏感性最小。 相似文献
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ZHANG Jun-hong XIE An-guo SHEN Feng-man 《钢铁研究学报(英文版)》2007,14(2):1-5
A multi-objective optimization and analysis model of the sintering process based on BP neural network is presented. Genetic algorithms are combined to simplify the BP neural network, which can reduce the learning time and increase the forecasting accuracy of the network model. This model has been experimented in the sintering process, and the production cost, the energy consumption, the quality (revolving intensity), and the output are considered at the same time. Moreover, the relation between some factors and the multi-objectives has been analyzed, and the results are consistent with the process. Different objectives are emphasized at different practical periods, and this can provide a theoretical basis for the manager. 相似文献