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首先测定巴西、澳洲及中国的10种铁矿粉的高温特性,将其与实际生产统计所得的高温特性适宜区间比较可知:巴西矿的同化性偏低,澳洲矿偏高,中国精粉则相对接近适宜区间;有两种巴西矿、一种澳洲矿以及一种中国精粉的液相流动性适宜,一种巴西矿、一种澳洲矿以及两种中国精粉则偏低,一种澳洲矿和一种中国精粉的液相流动性稍高;澳洲矿的黏结相自身强度偏低,巴西矿和中国精粉则较为适宜,且中国精粉相对更高.在实验研究的基础上,提出基于铁矿粉高温特性互补而使混合矿高温特性指标适宜的烧结配矿新思路,并设计优化配矿方案,烧结杯实验结果显示均获得优良的烧结指标,证实了基于铁矿粉高温特性进行配矿的优越性. 相似文献
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烧结矿在中国高炉的入炉炉料中所占比例为70%左右,烧结工序能耗占钢铁生产能耗的8%~10%,合理优化烧结配矿过程有利于钢铁企业增产降耗。利用铁矿粉烧结高温基础特性指导优化配矿更符合生产实际,基础特性中的同化性反映铁矿粉与CaO熔剂形成液相的难易程度,影响烧结矿的矿物组成、冷态性能及冶金性能,近年来相关研究取得了较大的进展。首先总结了铁矿粉同化性的研究历程,以及当前同化性检测的方法及设备,探讨了各种方法的优缺点,随后分析了不同铁矿粉化学成分等对最低同化温度的影响。结果表明,随着SiO2、Al2O3含量的增加,最低同化温度先降低后升高;MgO、(Al2O3+SiO2+MgO)含量的增加使最低同化温度升高。对不同含铁矿物而言,一般表现为褐铁矿同化性优于赤铁矿,磁铁矿的同化性最差。最后,在前人研究的基础上,基于烧结工艺、优化配矿以及实践经验,总结并探讨了现阶段存在的问题,并尝试提出了未来相关研究的方向。 相似文献
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??In order to guide the ordination of sintering production?? high temperature performance characteristic numbers were used to study the high temperature performance of iron ore fines. The high temperature performance characteristic numbers of iron ore powder combined with various information parameters of sintering process?? which could characterize the high temperature characteristics more accurately and comprehensively. Based on the experimental analysis of 7 single ore fines?? different kinds of equal performance ore fines in the mixed ore were replaced according to their high temperature performance difference?? and the high temperature performance of the mixed ore after replacement was analyzed. Then the quality fluctuation of sintered ore before and after replacement was verified through industrial experiments. It is found through the experiments that within a certain percentage?? the high temperature performance characteristic numbers of mixed ore powder change little and the high temperature performance of the mixed ore remains stable basically during the equal performance replacement. The tumbler strength of sinter is maintained at a stable level?? and the quality meets the requirement of the blast furnace production?? which can be used to guide the ore proportioning and provide reference for actual sintering production. 相似文献
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Iron ore sintering is a part of blast furnace ironmaking production. In order to upgrade the sintering automation and intelligent manufacturing, it is necessary to carry out sintering process modeling and simulation optimization. The research status of sintering process modeling and simulation was discussed. And three kinds of model, namely process mechanism and feature information characterization model, data- driven fusion model and field state analysis numerical simulation model, were summarized from the aspects of information modeling and intelligent optimization. The advantages and disadvantages of a series of model construction methods were analyzed by combining with automation requirement of sintering process, and the simulation models application trends were proposed. According to the requirement of sintering intelligent manufacturing that included in the ??Made in China 2025?? plan, the production practices of sintering process modeling and simulation optimization are crucial. 相似文献
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摘要:为了研究铁矿粉对铁焦炭化过程中体积膨胀 收缩机制的影响,采用高温热台显微镜、Image pro plus软件、扫描电镜、XRD等先进的表征手段解析了不同铁矿粉及其添加量对铁焦成焦过程的宏观体积、微观结构和矿物组成的影响。研究结果表明,随着铁矿粉添加量的增加,铁焦炭化过程中的体积收缩量逐渐减小。相同铁矿粉添加量时,铁矿粉种类对铁焦炭化过程中的体积演变影响较小。炭化过程中铁焦内含铁矿物由Fe2O3逐渐还原为金属Fe,但不同铁矿物还原后在铁焦内的分布规律有所差异。 相似文献