共查询到19条相似文献,搜索用时 171 毫秒
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结合武钢冷轧厂的现场实际情况,对现场粉尘及带钢除尘系统性能进行了测试、分析,发现带钢表面松动的氧化铁皮,在带钢高速运行的过程中因振动而沿程脱落,造成整个酸洗机组头部带钢上、下表面均有不同程度的扬尘,尘源范围广。现有的酸洗机组除尘系统除尘效果并不理想。根据测试、分析结果,提出一系列的改造方案,为类似工程改造提供参考依据。 相似文献
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用人造空气负离子抑制开放性尘源是空气离子应用的一个方面,尘源的抑制,尤其是大小为10μ以下称之为飘尘的开放性尘源,不能用一般传统的过滤、净化、分离装置来控制时,空气离子就显示出有独到之处。开放性尘源是指人与尘埃未加隔开的“人尘并存”的环境中的尘埃。①当使用人 相似文献
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一种新型热轧带钢层流冷却水供水工艺流程 总被引:1,自引:0,他引:1
通过常规和新型热轧带钢层流冷却循环水系统工艺流程的对比,分析新型热轧带钢层流冷却循环水系统工艺的优点。结合具体工程中采用的新型热轧带钢层流冷却循环水系统,论述了设计过程,并着重对该系统的节能情况进行了说明。 相似文献
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目前,对开放性尘、雾的净化治理工作,仍采用密封罩罩起来,再用引风设备把尘、雾输送到除尘、净化装置中达到净化之目的。常用的净化装置有文丘里式、旋风式、袋式和普通高压静电式等类型。随着绝缘材料耐压能力的提高,超高压发生器制造技术的出现,近十几年来人们开始了对超高压静电除尘的研究,用超高压静电抑制开放性尘源的可能性已成为现实。这对以煤为原料的化工生产厂家,在煤运系统中运用超高压静电抑制开放性尘源,消除粉 相似文献
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应用受体模型的化学质量平衡法对采暖期朔州市市区5个监测点的总悬浮颗粒物(TSP)进行污染源的源解析.分析了朔州市TPS的主要来源,得出6类污染源对朔州市TSP的平均贡献率分别为:道路尘26.16%;原煤尘23.55%;民用煤烟尘18.96%;工业煤烟尘11.22%;土壤尘13.69%;建材尘6.47%. 相似文献
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An experimental technique was developed to perform in situ photo correlation spectroscopy measurements on length distribution of dynamic polydisperse iron oxide aerosols with diameters ranging from 0.01 to 0.05 μm. The cumulant analytical method is used to determine the average length of the chain aggregate. The experimental results show that the average length of the iron oxide aerosols obtained by the photo correlation spectroscopy technique is basically consistent with the results obtained by TEM. Results indicate that the length of the iron oxide samples increases as the liquid carbonyl temperature increases and the gas flow dilution ratio decrease. 相似文献
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在对原有冷轧平整液废水处理工艺分析的基础上,提出采用电催化氧化技术,验证其预处理平整液废水的可行性。试验结果表明,平整液废水COD、油的质量浓度分别为12000~20000、800~1000mg/L,BOD与COD的质量比小于0.35,经处理后,BOD与COD的质量比为0.5~0.6,COD的质量浓度为3000~5200mg/L,油的质量浓度小于70mg/L。电催化氧化处理冷轧平整液废水,出水稳定,可生化性好,满足生化处理的进水要求。 相似文献
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氧化铁磁性纳米粒子的表面修饰及应用 总被引:1,自引:0,他引:1
氧化铁磁性纳米粒子因其优异的性能,广泛应用于环境分离、生物活性物质的富集和分离等领域,近年来引起了广泛的关注和研究。文章总结了氧化铁肱性纳米粒子表面修饰方法及相关应用,并对其前号进行了展望。 相似文献
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The technique of hydrothermal stripping from mixed aqueous-organic systems is a promising method for synthexizing oxide ceramic powdcrs for high-performance applications.Some factors influcncing heterogeneous hydrothermal stripping with water from iron-loaded organic phase of naphthenic acid-isooctyl alcohol-kerosenc,such as initial concentrations of iron and naphthenic acid,concentration of Fe2O3“seed”,temperature and time,were investigated.Baseed on the experimental results,the rate equation was established.Nano-ferric oxide powders were obtained by the technique of hydrothermal stripping from the iron-loaded organic phase.The results suggest that the heterogeneous hydrothermal stripping proceeds in 3 steps:adsorption of naphthenic acid dimers and naphthenic complex of iron onto the surface of “seed”,hydrolysis of adsorbed complex of iron,and condensation of hydrolyzed complex.The process activation energy is 115kJ/mol and the heterogeneous hydrothermal stripping is controlled by a chemical reaction(the hydrolysis of naphthenic complex of iron). 相似文献
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ROBERT W. CLINE RICHARD M. FULRATH JOSEPH A. PASK 《Journal of the American Ceramic Society》1961,44(9):423-428
An experimental unit was developed to allow the application of the glass specimen onto the metal surface at elevated temperatures and under controlled atmospheric conditions. Sodium disilicate glass on Armco iron had a contact angle of 55°± 2° at 900° to 1000° C. in vacuum and poor adherence; on magnetite, 2°± 1°, and excellent adherence. Behavior on oxidized iron was affected by the ability of the glass to dissolve large quantities of oxide rapidly. Glass when dropped onto a lightly oxidized surface spread toward lower angles and retracted essentially to the 55° angle on solution of the oxide; adherence, in this case, correspondingly ranged from good to poor. When the glass dissolved a sufficient amount of iron oxide and etching of the metal occurred, resulting in the appearance of fayalite, the contact angle was in the range 15° to 35° and the best adherence was obtained. Vaporization of iron in vacuum at 1000°C. did not seem to be retarded by thin oxide films. 相似文献
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针对钢铁厂含铁尘泥低附加值的问题,以氯化胆碱-二水合草酸(CC-OA)低共熔溶剂(DES)为研究体系,以钢厂含铁粉尘(经水洗处理)为研究对象,提出了运用氯化胆碱-二水合草酸低共熔溶剂处理含铁粉尘固相前驱体热分解法制备纳米氧化铁,并对处理过程中前驱体热分解及纳米氧化铁晶粒生长进行动力学分析。研究表明:处理过程中得到的前驱体为FeC2O4·2H2O,以其热分解第二阶段为热分析动力学的研究目标,根据Ozawa方程法、Kissinger-Akahira-Sunose方程法和Starink方程法3种等转化率法得到的平均反应活化能为220.54 kJ/mol。前驱体焙烧的最佳条件:焙烧温度为673 K、焙烧时间为1 h。根据唯象方程计算出纳米氧化铁的晶粒生长平均激活能为39.06 kJ/mol,并得到了焙烧温度、焙烧时间与粒径的关系,实现特定粒径纳米氧化铁的制备。最佳焙烧条件下得到的纳米氧化铁纯度达99.67%,扫描电镜下观察其颗粒呈现不规则的立方晶体结构,粒径主要分布在10~100 nm。 相似文献