共查询到19条相似文献,搜索用时 46 毫秒
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从冷却塔结晶看低污染沉矾 总被引:1,自引:0,他引:1
对赤峰红烨锌冶炼有限责任公司电解冷却塔结晶作了深入细致的分析,认为低污染沉矾工艺不尽合理,导致湿法炼锌系统中铵根离子大量富集,在冷却塔形成锌铵矾结晶。 相似文献
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比较了常规黄钾铁矾法与低污染黄钾铁矾法沉铁的优缺点,针对常规黄钾铁矾法铁矾渣含锌高以及低污染黄钾铁矾法无法处理高铁原料的问题,提出常规黄钾铁矾法与低污染黄钾铁矾法联合沉铁新工艺。 相似文献
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湿法炼锌浸出沉铁探讨 总被引:9,自引:0,他引:9
介绍了湿法炼锌的常规浸出法、黄钾铁矾法、针铁矿法沉铁热力学、动力学条件,以及提高湿法炼锌浸出沉铁速度和沉铁效果的影响因素,并结合株冶浸出厂沉铁的现状,提出应采取的措施。 相似文献
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湿法炼锌中矾渣的分离 总被引:2,自引:1,他引:2
利用重力分级技术可分离矾渣中未溶解的焙砂或烟尘,通过外加10%左右的晶种,不但可以缩短沉矾时间30min以上,而且得到的沉淀物颗粒大、易于沉淀、过滤和洗涤,降低矾渣中可溶性的锌。 相似文献
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铁矾法从富铟高铁硫化锌精矿加压浸出液中沉铟研究 总被引:5,自引:1,他引:5
研究利用黄钾铁矾法从富铟高铁加压浸出液中沉铟的影响因素,并与黄铵铁矾法沉铟做比较。结果表明,在相同条件下,黄钾铁矾法具有更大的沉铟能力,且所需要的时间为3 h,远少于黄铵铁矾法沉铟所需要的时间。黄钾铁矾法沉铟最佳工艺条件:pH=1.73~1.75,温度96~98℃,铁铟摩尔比大于200,反应时间3 h,添加晶种,晶种添加量为理论生成铁矾量的1.5倍时,黄钾铁矾法沉铟率高达97%以上,铁的沉淀率也达到98%左右,为后续电积Zn提供了合格的浸出液。 相似文献
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通过对湿法炼锌过程所涉及的三元体系M_2SO_4-ZnSO_4-H_2O(M=K,Na,NH4)溶解度相图的比较研究,发现在上述三元体系中,在一般的冶炼工艺条件下,复盐(如(NH_4)_2SO_4·ZnSO_4·6H_2O(s)、Na_2SO_4·ZnSO_4·4H_2O(s)、K_2SO_4·ZnSO_4·6H_2O(s)远比单盐(如ZnSO_4·7H_2O(s)、Na_2SO_4(s)、K_2SO_4(s))要容易析出得多。这些复盐在溶液中的溶解度均随着温度的降低而降低,是管路结晶的主要诱因。溶解度较小的((NH_4)_2SO_4·ZnSO_4·6H_2O(s)生成是导致黄铵铁钒除铁过程管路易结晶堵塞的主因。 相似文献
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在2012年提产改造中,硫酸铝生产线改用高效冷却回转钢带,新系统的钢带可以任意调整、维护方便,与使用传统回转钢带相比,员工劳动强度降低,生产系统产能提高60%以上。 相似文献
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This paper describes new rate equations which fit exactly the experimental data of carbon precipitation from supersaturated
α iron. The experimental data reported by Abe and Suzuki, electrical resistivity, thermoelectric power, and Vickers hardness,
are used. A low carbon steel is quenched from 700°C and aged isothermally in the range from 35 °C to 300°C. Aging curves are
separated into two curves corresponding to characteristic precipitates, and superposition of the two curves elucidates the
reason why two-stage aging curves often appear. The separation of aging curves clarifies the temperature dependence of each
precipitation, and activation energies of 0.57, 1.21, 0.80, and 1.45 eV are obtained for cluster, e carbide formed below 75
°C, ε carbide above 100°C, and cementite, respectively.
Formerly Graduate Student, Institute of Industrial Science, Tokyo University, Minato-ku, Tokyo 106
Formerly Graduate Student, Tokyo University 相似文献
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Jamil Rima Maurice Abourida Melek Yalcintas Abidin Kaya 《Canadian Metallurgical Quarterly》2010,136(6):591-596
Modified by ethylenediaminetetraacetic acid (EDTA) salts and unmodified bagasse fibers were tested for the removal of total dissolved solids (TDSs) from cooling tower water. Parameters such as hydrogen ion concentration (pH), particle size of bagasse fibers, and the concentrations of adsorbent and adsorbate were studied to optimize the conditions to be applied on a commercial scale for the decontamination of effluents of cooling tower water. The optimum pH for TDS removal was between 6 and 6.5. The efficiency of TDS removal increased when the size of fiber particles decreased (100?μm) and when the concentration of EDTA salt increased to reach 78 mg/g of modified bagasse fibers. The adsorption parameters were determined using both Langmuir and Freundlich isotherms. The preferential mechanisms for the retention of TDSs are a complexation process between the TDSs and chemical functions present on the surface of fibers, and the chelation process with the EDTA attached to the fibers. The results obtained could be valuable for application to cooling tower water treatment and for the softening of hard drinking water. 相似文献
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论述了对株冶锌电解废液 50m2 鼓风式玻璃钢冷却塔的风机、塔体结构、喷嘴、捕滴装置及抖动板的改造 ,提高了冷却塔的制冷能力 ,延长了使用周期 ,降低了生产能耗 ,并为冷却塔的改造提供了经验。 相似文献
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采用黄钾铁矾法除去废航天磁性材料浸出液中的铁,探究除铁的最佳条件。结果表明,在pH=1.5、温度90℃、反应时间2h时除铁效率可以达到95%左右。在添加晶种、pH=1.5、温度90℃、反应1.5h的条件下,除铁率也可以达到95%。 相似文献