共查询到20条相似文献,搜索用时 93 毫秒
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本文重点对烟气洗涤配套回转窑处理锌浮渣过程进行探究,分析回转窑在不同温度、窑转速条件下产出小窑焙砂的氯含量,得出窑尾温度400℃±10℃、窑转速13 Hz、反应时间3 h、窑头料面温度约850℃的最佳反应条件。在该条件下,小窑焙砂含氯量小于0.08%,锌浮渣脱氯效率达到97%。并分析该处理系统的压力降、温度差、氯分布及平衡,提出工艺操控的关键点。 相似文献
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锌浸出渣挥发窑处理烟气收尘 总被引:4,自引:0,他引:4
文章根据株洲冶炼厂挥发窑烟气收尘的生产实践,论述了内滤式袋式收尘、低压脉冲喷吹袋式收尘、电收尘等收尘装置生产概况,并对其发展了深入探讨。 相似文献
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本文详细阐述了用电解锌浮渣生产电解锌的工艺技术诀窍,使得浮渣这一原本由于含氟、氯高无法生产电解锌的冶炼渣经过简单处理就能够生产电解锌。 相似文献
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A zinc dross was cast into anodes and electrorefined in an ammoniacal ammonium chloride electrolyte (NH3–NH4Cl) to produce high purity zinc. The influence of several factors, such as zinc concentration, current density and temperature, on cathodic current efficiency and power consumption were investigated. The results indicated that increasing Zn concentration increased the current efficiency, but, very high Zn concentrations affected the progress of the electrolysis of zinc dross. The power consumption can be decreased effectively by increasing the temperature of electrolyte. High current density adversely affected the quality of the cathodes and increased the power consumption. The morphology of cathodic zinc can be improved by increasing Zn concentration at an appropriate current density and its purity was very acceptable. All the experimental results obtained showed a technical feasibility of the NH3–NH4Cl system as an electrolyte system for electrorefining of zinc dross. 相似文献
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基于欧拉-拉格朗日方法的离散相模型,针对锌液体外循环系统下连续热镀锌锅中三种不同类型的锌渣,利用数值模拟的方法计算锌锅中锌渣的浓度差分布.分析锌渣扩散得到了锌渣在带钢表面及锌锅中的运动轨迹和分布规律.结果表明:锌渣在带钢上的沉积率随着锌渣粒度的减小而升高;由于锌渣密度的差异,当锌渣直径小于80μm时,沉积率从高到低依次为悬浮渣、面渣和底渣.面渣在带钢出口后侧区域的平均停留时间最长,在该位置设置抽锌管将有利于面渣的去除;在V形区内侧区域带钢上的悬浮渣质量浓度最高,对带钢影响最大;底渣主要运动区域为锌锅底部,基本不会黏附于带钢表面,对带钢质量影响最小. 相似文献
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温度和铝含量对锌铝池中锌渣形成的影响 总被引:3,自引:0,他引:3
采用扫描电镜(SEM)和X射线能谱仪(EDS)分别对480~620℃范围内的Zn-22.3%Al、530~620℃范围内的Zn-30%Al和620℃下的Zn-55%Al(Al含量均为质量分数)镀锌铝池中锌渣的组成相及其形成规律进行系统分析与研究。结果表明,Zn-22.3%Al锌铝池在480℃和500℃下形成与由τ5和τ6相组成的面渣,在520℃形成的面渣为τ5相;Zn-30%Al锌铝池在530℃和550℃下也生成由τ5和τ6相组成的面渣,但570℃下面渣仅为τ5相。Zn-22.3%Al锌铝池由于密度低,在620℃时仅生成面渣(τ2+Fe Al3);Zn-30%Al锌铝池在620℃时除了生成面渣(τ5+Fe Al3)外,中间层还生成τ5和τ6相锌渣;Zn-55%Al锌铝池在620℃下除了形成底渣τ5相以外,中间层还生成τ6相锌渣。 相似文献
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通过对锭模的改进设计,规范造型工艺,提高了圆盘铸锭的冷却效率和锌锭的表面质量,并解决了商标清晰度的问题。 相似文献
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本文综述了锌处理工艺的进展。大多数锌处理工艺始于火法冶金。回顾奥图泰的发展历程,可以看出大部份基础研发始于20世纪六十年代末。此后,奥图泰迅速拓展了锌精矿加工成阴极锌的范围。尤其是在20世纪九十年代,奥图泰在锌焙烧、浸出、净液、电积领域取得了较大的发展。这些进展的主要目的是尽量向客户提供经济和环保的解决方案。 相似文献
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《钢铁冶炼》2013,40(4):316-320
AbstractDross in zinc pots is the most important factor that impairs the surface quality of hot dip galvanising automobile steel sheet. Separation behaviour of zinc dross from galvanising melts of different Al concentrations (0·12, 4·5 and 55·0 wt-% by an alternating magnetic field has been investigated in order to reduce the dross defects on steel sheets. The properties of different zinc drosses were investigated by means of EDAX and the quantitative metallographic method and the conductivities were measured by physics property measurements system. The experimental results show that the zinc dross in different hot dip galvanising melts has different morphologies, compositions and structures, and the average particle size of the dross increases with the Al concentration. In the case of extra iron (above the solubility limit) in the zinc melt, zinc dross quantity also increases with the Al concentration. All of the three types of zinc dross particles >5 μm can be successfully separated when the magnetic frequency is 17·5 kHz, effective magnetic flux intensity is 0·05 T, imposed time is 15 s and the cross-section of the ceramic square pipe is 5 × 5 mm. 相似文献