共查询到18条相似文献,搜索用时 78 毫秒
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用不同的精炼剂对氧化性钢液进行还原精炼的实验研究,结果表明:预熔型复合精炼剂具有显著净化钢液和快速脱硫的精炼效果。 相似文献
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LiO2对CaO—SiO2—MgO—Fe2O3—MnO2—P2O5精炼渣系脱磷的影响 总被引:1,自引:1,他引:0
在LiO2替代CaO-SiO2-MgO-Fe2O3-MnO2-P2O5精炼渣系中部分CaO的条件下,研究了LiO2含量、碱度及氧化性对钢液磷含量的影响。结果表明,在LiO2=15%,碱度(CaO LiO2)SiO2为2.0-2.5(Fe2O3 MnO2)为7%的条件下,该渣系对钢液的脱磷率在70%以上,控制钢液磷含量在0.009%以下。 相似文献
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通过热力学计算和实验室试验,考察了BaO和Na2O对LF还原渣系磷容量的影响,试验结果表明,精炼渣中加入一定量BaO和Na2O可减少钢不回磷量。 相似文献
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Li2O对CaO-SiO2-MgO-Fe2O3-MnO2-P2O5精炼渣系脱磷的影响 总被引:1,自引:1,他引:1
在Li2 O替代CaO SiO2 MgO Fe2 O3 MnO2 P2 O5精炼渣系中部分CaO的条件下 ,研究了Li2 O含量、碱度及氧化性对钢液磷含量的影响。结果表明 ,在Li2 O =15 % ,碱度 (CaO +Li2 O) /SiO2 为 2 .0~ 2 .5 ,(Fe2 O3 +MnO2 )为 7%的条件下 ,该渣系对钢液的脱磷率在 70 %以上 ,控制钢液磷含量在 0 .0 0 9%以下。 相似文献
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向CaO基熔剂中添加Li2O,Na2O,K2O和BaO对钢水回磷控制效果的影响 总被引:3,自引:0,他引:3
在1853K温度下,用强碱性氧化物Li2O,Na2O,K2O和BaO分别替代CaO-SiO2-Fe2O3-MnO2-MgO-P2O5系熔剂中的部分CaO,进行钢水回磷控制实验.结果表明,上述添加剂影响钢水脱磷效果的强弱顺序为Li2O>Na2O>K2O>BaO.推荐Li2O作为CaO基实验熔剂的首选添加剂.确定钢水回磷控制用CaO基熔剂的优化组成为W(CaO+Li2O)/WSiO2=2.5,WLi2O=15%,W(Fe2O3+MnO2)≥2%.当W(Fe2O3+MnO2)=2%时,采用上述组成的熔剂可获得48.1%的脱磷率.向CaO基熔剂中添加10%~30%的Li2O后,其磷酸盐容量lgCp为20.32±0.22,比未添加Li2O时CaO基熔剂的最大磷酸盐容量值增加了0.5~1.0个数量级. 相似文献
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Effects of La2O3/Li2O/TiO2- Coating on Electrochemical Performance of LiCoO2 Cathode 总被引:1,自引:0,他引:1
Conventional cathode material (LiCoO2) was modified by coating with a thin layer of La2O3/Li2O/TiO2 for improving its performance for lithium ion battery. The morphology and structure of the modified cathode material was characterized by SEM, XRD, and Auger electron spectroscopy. The performance of the cells with the modified cathode material was examined, including the cycling stability, the diffusion coefficient under different voltages, and the C-rate discharge. The results showed that the cell composed of the coated cathode material discharged at a large current density, and possesses a stable cycle performance in the range from 3.0 to 4.4 V. It was explained that the rate of Li ion diffusion increased in the cell while using La2O3/Li2O/TiO2-coated LiCoO2 as the cathode and the coating layer may act as a faster ion conductor (La2O3/Li2O/TiO2). 相似文献
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炼铁原燃料碱金属含量较高时,既会影响铁矿石质量,还会导致高炉透气性差、焦比升高,这是钢铁企业需要重点关注的问题之一。从碱金属化合物K2O入手,经过配料制样、强度测验、扫描电镜等,分析其对赤铁矿强度和铁酸钙强度的影响。结果表明,K2O质量分数由0增加至4%时,赤铁矿烧结后的抗压强度由5 000降低至2 863 N;铁酸钙的抗压强度由3 066降低至680 N。在此基础上,以烧结配料中添加除尘灰的方式,通过烧结杯试验来探究碱金属对烧结矿强度的影响规律。烧结杯试验结果表明,随着除尘灰配比的增加,烧结矿转鼓强度下降。除尘灰配比由0增加到3.23%,烧结矿碱金属w(K2O+Na2O)由0.15%增加到0.25%,烧结矿转鼓强度由81.07%降低到75.47%。研究结果可为改善烧结矿强度和合理控制高炉碱负荷提供理论指导和参考依据。 相似文献
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依据炉渣结构的共存理论与不同温度和成分下熔渣CaO-MgO-MgO-FeO-CaF2-Al2O3-SiO2的实测粘度制定了本渣系作用浓度和粘度的计算模型.计算结果符合实际,证明作用浓度计算模型可以反映本渣系的实际结构;粘度模型也正确地反映了本渣系粘度与温度及各结构单元作用浓度的正确关系. 相似文献
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根据炉渣结构的共存理论与CaO-Al2O3-SiO2熔渣在不同温度和成分下实测表面张力值,制定了本渣系表面张力与熔渣各结构单元作用浓度及温度间关系的计算模型.计算结果符合实际,证明该模型可以反映本渣系表面张力随熔渣作用浓度和温度而变化的规律. 相似文献
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固体合成渣钢包脱硫的应用研究 总被引:1,自引:0,他引:1
介绍了如何控制小转炉终点硫含量和钢包钢水硫含量的试验。钢包使用合成渣能有效地脱硫,减少钢 氮以及降低钢中氧和夹杂物含量,但使钢水略有增氢。重点分析讨论了影响钢包合成渣脱硫效果的主要因素。 相似文献
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The activities of water, α(H2O), in the solution system of H2SO4-CuSO4-H2O were determined by an isopiestic method and those in the solution system of HCl-CuCl2-H2O by a transpiration method, both at 298 K. The activities of H2SO4 and H+ in the solution system of H2SO4-CuSO4-H2O were also determined at 298 K by the emf method. The water activities in both systems obeyed the Zdanovskii rule relatively
well. The α(H2O) experimentally determined in the sulfate system showed a satisfactory agreement with those calculated from the Robinson-Bower
equation, assuming the complete dissociations of H2SO4 and CuSO4, whereas a good agreement between the calculated and experimentally determined α(H2O) for the chloride system was obtained when the formation of Cu(II) chloro-complexes was taken into consideration. The mean
activity coefficients, γ±, of solutes, including H2SO4, HC1, and CuCl2 in these solution systems, were calculated at 298 K by the McKay-Perring method using the activity data. The γ±(H2SO4) values in the solution system of H2SO4-CuSO4-H2O were in good agreement with those determined by the emf method. On the other hand, the γ±(CuSO4) were calculated at the same temperature based upon the Gibbs-Duhem equation using both measured α(H2O) and calculated γ±(H2SO4) values, because of solubility limitations. 相似文献