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锌粉置换渣浸出过程中镓的溶解行为及改善方法
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作者 张伟 饶帅 +5 位作者 李立清 宫晓丹 吴才贵 胡东风 曹洪杨 刘志强 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2024年第3期1016-1026,共11页
针对丹霞冶炼厂锌粉置换渣浸出过程中镓浸出率偏低问题,采用ICP-AES、XRD与SEM-EDS对不同批次锌粉置换渣化学成分、物相与形貌进行详细分析。与正常生产锌粉置换渣相比,异常锌粉置换渣中镓主要赋存于黄钾铁矾之中,造成镓浸出困难。对锌... 针对丹霞冶炼厂锌粉置换渣浸出过程中镓浸出率偏低问题,采用ICP-AES、XRD与SEM-EDS对不同批次锌粉置换渣化学成分、物相与形貌进行详细分析。与正常生产锌粉置换渣相比,异常锌粉置换渣中镓主要赋存于黄钾铁矾之中,造成镓浸出困难。对锌粉置换渣氧压浸出过程进行分析,镓、砷和铁溶出规律较为一致:增大硫酸浓度和液固比有利于镓、铁和砷的浸出,但提高温度和氧气分压对镓、铁和砷溶出不利。依据上述研究结果,提出强化镓浸出效率的改善措施,弱化一段氧压浸出(分别降低反应温度和压缩空气总压至90℃和0.2 MPa)与强化三段常压浸出(分别提高硫酸浓度和反应温度至160 g/L和85℃),镓的浸出效率由77.83%提高至96.46%。 展开更多
关键词 溶解行为 锌粉置换渣 黄钾铁钒 臭葱石
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Detection and significance of EEG, neurological function, immune function and related factor levels in children with viral encephalitis
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作者 Yan Xiao xiao-dan gong +2 位作者 Min Liu Yu Wang Zhao-You Meng 《Journal of Hainan Medical University》 2019年第16期22-25,共4页
Objective:To analyze the changes of EEG,neurological function,immune function and inflammatory factors in children with viral encephalitis and their clinical significance.Methods:60 children with viral encephalitis in... Objective:To analyze the changes of EEG,neurological function,immune function and inflammatory factors in children with viral encephalitis and their clinical significance.Methods:60 children with viral encephalitis in our hospital were collected as observation group and 60 healthy children were collected as control group during the same period.The electroencephalogram(EEG)of the children in the observation group was observed,and the serum levels of S100B protein(S100B),neuron specific enolase(NSE),myelin basic protein(MBP),immunoglobulin G(IgG),immunoglobulin M(IgM),hypersensitive C-reactive protein(hs-CRP)and cystatin C(Cyst C)were detected and compared between the two groups.Results:The electroencephalogram results of the observation group showed that 55 cases were abnormal,the positive rate was 91.67%.Among them,30 cases were mild abnormal,19 cases were moderate abnormal and 6 cases were severe abnormal.The serum levels of S100B,NSE and MBP of patients in the observation group were(231.26±25.74)ng/L,(18.92±2.03)ug/L,(1.44±16.23)ug/L,which were significantly higher than the control group(P<0.05);The serum levels of IgG and IgM were(7.45±0.76)g/L,(0.83±0.09)g/L respectively,which were significantly lower than those in the control group(P<0.05).The serum levels of hs-CRP and Cyst C of patients in the observation group were(4.59±0.51)mg/L,(14.38±0.09)mg/L,respectively,which were higher than those of the control group(P<0.05).Conclusion:The positive rate of EEG diagnosis was high.The changes of neurological function,immune function factors,hs-CRP and Cyst C levels may become important reference indicators for auxiliary diagnosis and early treatment of children with viral encephalitis.Neurological function,immune function factors,hs-CRP and Cyst C are all related to the progression of viral encephalitis.The above indicators can be used as important indicators for assistant diagnosis and early treatment of viral encephalitis in children. 展开更多
关键词 VIRAL ENCEPHALITIS EEG NEUROLOGICAL FUNCTION Immune FUNCTION
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