首页> 外文OA文献 >Preparation of High Purity Zinc Oxide from Zinc Metal Scrap
【2h】

Preparation of High Purity Zinc Oxide from Zinc Metal Scrap

机译:由锌废金属制备高纯氧化锌

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务,本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文,但由于OA文献来源多样且变更频繁,仍可能出现获取不到、文献不完整或与标题不符等情况,如果获取不到我们将提供退款服务。请知悉。

摘要

Pyrometallurgical process is utilized to recover zinc in the form of high purity zinc oxide from a kind of zinc metal scrap containing 92.49 wt% zinc. The process uses tube-type furnace, where the reactor is divided into volatilization zone and oxidization zone by flowing nitrogen gas and air. In the process, zinc is firstly volatilized to vapor in inert atmosphere of nitrogen gas and carried forward to oxidization zone by nitrogen gas, then oxidized to zinc oxide in air atmosphere. The effect of temperature, air and nitrogen gas flow-rates, and reaction time on both purity and yield of the product is investigated in detail in this study. Subsequently, the characteristics of the products are examined by X-ray diffractometer and scanning electron microscope. The obtained results demonstrated that both the purity and the yield of the product have relationships with the operation parameters. The contents of the impurities grow with the rise of temperature, with the increase of nitrogen gas or air flow-rate, and also with the extension of reaction time. However, the yield decreases with the decrease of temperature, with the reduce of nitrogen gas flow-rate, with the rise of air flow-rate, and also with the diminishment of reaction time. In addition, very low air flow-rate resulted in the increase of metallic zinc in the product and the decrease of the yield of the product at the same time. Zinc oxide with purity of 99.97 wt% and yield of 94.45% in nano-grade dimension can be obtained in presence of 300ml/min N2 flow-rate and 800ml/min air flow-rate for 12 minutes at 1253 K, whereas the impurity content of Al, Fe, Cu, Pb and Cd is 0.0072 wt%, 0.00060 wt%, 0.00096 wt%, 0.0048 wt% and 0.00031 wt%, respectively, which approaches the quality demands of the first-grade-zinc oxide in JIS (Japanese Industrial Standard) K 1410-1995.
机译:火法冶金法用于从一种含92.49 wt%锌的锌金属废料中回收高纯度氧化锌形式的锌。该方法使用管式炉,其中通过使氮气和空气流动而将反应器分为挥发区和氧化区。在该方法中,锌首先在氮气的惰性气氛中挥发成蒸气,然后被氮气带入氧化区,然后在空气气氛中氧化成氧化锌。在这项研究中,详细研究了温度,空气和氮气流速以及反应时间对产物纯度和收率的影响。随后,通过X射线衍射仪和扫描电子显微镜检查产物的特性。所得结果表明,产物的纯度和产率均与操作参数有关。杂质的含量随着温度的升高,氮气或空气流速的增加以及反应时间的延长而增长。但是,产率随着温度的降低,氮气流速的降低,空气流速的升高以及反应时间的减少而降低。另外,极低的空气流速导致产物中金属锌的增加和产物产率的下降。在1253 K下,在300ml / min的氮气流量和800ml / min的空气流量存在12分钟的情况下,可以得到纯度为99.97 wt%,纳米级产率为94.45%的氧化锌。 Al,Fe,Cu,Pb和Cd的含量分别为0.0072 wt%,0.00060 wt%,0.00096 wt%,0.0048 wt%和0.00031 wt%,接近JIS中一级氧化锌的质量要求工业标准)K 1410-1995。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号