共查询到19条相似文献,搜索用时 153 毫秒
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用印度粉矿替代澳大利亚粉矿,烧结机利用系数降低,烧结矿强度下降,返矿率上升,影响了烧结生产的技术经济指标。为此进行了在现有原料条件下配加高品位印度矿的烧结试验。实验室试验结果表明,用8%高品位印度粉矿替代8%澳大利亚粉矿,钢渣配比由4%增加到6%,烧结矿中<5mm的粉末含量下降,烧结机利用系数、转鼓指数均有较大的提高。 相似文献
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为了降低弦线转子泵的流量脉动率和提高转子的面积利用系数,提出具有两对转子的双啮合弦线转子泵。分析转子径距比对弦线转子泵脉动率和转子面积利用系数的影响;探究双啮合弦线转子泵流量脉动率与两对转子之间的差动角大小的关系,得出了当差动角〖BF〗α=π/(2z)〖BFQ〗时,双啮合弦线转子泵的脉动率为0;且此时通过增大转子径距比可提高转子面积利用系数,使转子面积利用系数由原来的245%提高到451%。研究结果表明:双啮合弦线转子泵具有转子面积利用系数高、无流量脉动的特点。 相似文献
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提高高炉利用系数的工艺措施 总被引:1,自引:0,他引:1
通过实例介绍美国同炉提高利用系数的技术措施,并以实际生产数据对使用金属化炉料、喷吹天然气、煤粉和富等提高高炉利用系数的不同工艺方法进行了比较和评价。 相似文献
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该厂为了在提高经济性的同时提高生铁产量,决定于1965年起采用100%的自熔性烧结矿作为高炉炉料。由于原来的75米~2的带式烧结机已不能满足每天生产6000吨烧结矿的需要,故要采用较大的烧结机,因为大型烧结机的购置费、生产维修费、耗电费都比几台小型烧结机的低(按每生产一吨烧结矿计),而且大 相似文献
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热压烧结机是金刚石工具生产中的关键设备,液压加载系统是保证工件整个烧结工艺过程中加工质量的重要系统.阐述了热压烧结机液压系统工作原理,分析了该系统的技术特点.实践证明,采用电液比例加载的烧结机,实现了机电液一体化,自动化程度、安全可靠性及工艺参数控制精度得到了显著提高,操作条件大为改善. 相似文献
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从土平炉到烧结锅,从烧结锅到烧结机,从烧结机到富氧底吹氧化-鼓风炉还原熔炼,再到今天的液态高铅渣直接还原炼铅技术,科技创新带动项目建设,项目建设拉动产业升级。一次次凤凰涅槃,豫光实现了由小到大、由大到强的嬗变。 相似文献
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烧结是钢铁生产过程主要的耗能工序,在烧结过程采用余热回收技术能够有效地回收能量,降低能耗.本文建立了烧结过程余热利用的经济性分析模型,对比分析了余热发电与余热驱动机械这两种余热利用方案的经济性.结果表明:余热发电方案中,发电机组功率较大时,余热回收系统投资回收期更短;余热驱动机械方案中,汽轮机的负荷大小对于投资回收周期... 相似文献
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免疫遗传算法在烧结矿配料优化中的应用 总被引:4,自引:0,他引:4
运用免疫遗传算法和MATLAB语言 ,编制了钢铁烧结矿配料优化计算仿真程序 ,计算机仿真结果表明符合实际生产工艺要求 ,可直接应用于生产 ,提高各种烧结矿的综合利用率 ,降低成本 1 0 32 %。从而证明了免疫遗传算法是一种切实有效的优化方法 ,该算法为钢铁烧结矿配料问题的优化求解提供了新的思路和方法。 相似文献
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In this study, the results of measurements on pressureless sintering behavior of Ag-SnO_2(88%wt Ag,12%wt SnO_2) pellets were reported. Dilatometric measurements, relative densities, hardness values, rupture transverse strength and electrical conductivities function of sintering temperatures were presented. A constant thermal expansion coefficient was determined, and a threshold temperature of densification(T_d) was exhibited. Sintering kinetics were reported for different temperatures. Hardness values were measured, and no increase in hardness is found under Td. Three-points bending tests were used to determine the transverse rupture strength whose evolution appears importantly well under Td. In the same manner, the increase in initial electrical conductivities begins well under Td. Under the threshold temperature, the relative increase in electrical conductivity is found to be independent of initial density of green compact pellets. This work highlights different evolutions in function of sintering temperature for the electrical conductivity and transverse rupture strength on the one hand, and for the densification and hardness on the other hand. 相似文献
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《Scripta materialia》2004,50(9):1259-1262
Al2TiO5 has been obtained by reaction sintering of precursor powders synthesized by three powder processing methods. A field activated sintering technique has been used for the process, with 100 °C/min heating rate and short holding plateaus (minutes) at the maximum temperature. SEM, XRD, and density measurements were performed after sintering. 相似文献
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采用正交试验法确定了CuIn5合金放电等离子烧结(SPS)的最佳工艺参数,研究了烧结温度、烧结时间、烧结压力对CuIn5合金的致密度、硬度和导电性能的影响。结果表明:影响CuIn5合金致密度和硬度的主要因素均为烧结温度,其次为烧结压力,烧结时间的影响最小;影响CuIn5合金电导率的主要因素为烧结温度,其次为烧结时间和烧结压力。利用SPS技术制备CuIn5合金的最佳工艺为烧结温度850 ℃,烧结时间5 min,烧结压力50 MPa。采用最佳工艺制备的CuIn5合金组织均匀致密,In固溶于Cu中形成固溶体,其晶格常数为0.362 865 nm,晶格畸变率为0.38%,致密度为99.56%,显微硬度为136.3 HV0.1,导电率为37.86%IACS。 相似文献
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针对杭州钢铁厂的具体情况,用系统节能观点分析了影响炼铁系统综合能耗的因素及其相互关系,建立了炼铁系统用能优化模型。模型由炼铁系统总体模型和烧结过程子模型组成,二者均为非线性规划模型。应用所建立的模型和最优化方法研究了烧结原料配料的优化,烧结矿和球团矿的合理配比以及生产参数变化对炼铁系统综合能耗的影响。 相似文献
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The effect of changes in sintering temperature on electrical properties and microstructure of ZnO–polyaniline– polyethylene composite ceramics, prepared in disk form at the pressure of 60 MPa and at five different temperatures, has been investigated. Increasing sintering temperature from 30 to 120 °C noticeably reduces breakdown voltage from 830 to 610 V. Further increase in sintering temperature causes breakdown voltage to increase. Interface voltage barrier height behaves differently when sintering temperature increases, which is in contrast to breakdown voltage behavior. These samples have a very low leakage current, a factor which indicates low degradation. Then again, the higher the sintering temperature gets, the less the nonlinear coefficient becomes. In addition, each sample has hysteresis which decreases through increase of sintering temperature up to 120 °C. Further increase in sintering temperature, however, causes the hysteresis loop to spread. Regarding UV spectra of the samples, it is revealed that there are three impurity levels whose behaviors against sintering temperature are subtractive. Analysis of composite samples by scanning electron microscopy indicates that their microstructure consists of grains and grain boundaries. Resistivity of grain boundaries is the main responsible factor for these changes in varistor characteristic as a function of sintering temperature. 相似文献