Effect of Electroplating Sludge on the Iron Ore Sintering: Mineralization, Yield and Gaseous Emission

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2024-08-10 DOI:10.1002/srin.202400441

Yinhua Tang, Chengyi Ding, Xuchao Wang, Xiaoqing Xu, Yue Sun, Hongming Long, Rende Chang, Sheng Xue, Chunlong Fan

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Abstract

Electroplating sludge (ES), the inevitable by-product of electroplating wastewater treatment processes, has been conventionally managed via solidification landfilling or thermal processing; these methods may engender secondary environmental pollutants. This study proposes an innovative approach using iron ore sintering for effective ES treatment. The study reveals that incorporating 1.0% ES reduces the yield quality of the sintered ore, yet it remains within acceptable thresholds. It is noteworthy that when the addition of ES is 0.5%, it not only increases the sinter yield from 68.57% to 69.23% but also enhances the productivity from 1.19 to 1.32 t (m² h)⁻¹. Furthermore, the consumption of solid fuel decreases to 48.01 kg t⁻¹. Additionally, the treatment method significantly reduced the emissions of CO and NO_x in the sintering flue gas, with the average concentrations decreasing from 12681.32 to 9744.51 ppm for CO and from 244.81 to 161.11 ppm for NO_x. This study investigates the migration and transformation mechanisms of nickel and chlorine elements in ES by conducting inductively coupled plasma analysis on the sintered raw materials and their products, as well as scanning electron microscopy with energy dispersive X-ray spectroscopy analysis on the sinter ash.

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电镀污泥对铁矿烧结的影响：矿化、产量和气体排放

电镀污泥（ES）是电镀废水处理过程中不可避免的副产品，传统的处理方法是固化填埋或热处理；这些方法可能会产生二次环境污染。本研究提出了一种利用铁矿石烧结有效处理 ES 的创新方法。研究表明，加入 1.0% 的 ES 会降低烧结矿的产出质量，但仍在可接受的范围内。值得注意的是，当 ES 的添加量为 0.5%时，烧结矿的产量不仅从 68.57% 提高到 69.23%，而且生产率也从 1.19 吨（m2 h）-1 提高到 1.32 吨（m2 h）-1。此外，固体燃料的消耗量降至 48.01 kg t-1。此外，该处理方法还大大减少了烧结烟气中 CO 和 NOx 的排放量，CO 的平均浓度从 12681.32 ppm 降至 9744.51 ppm，NOx 的平均浓度从 244.81 ppm 降至 161.11 ppm。本研究通过对烧结原料及其产品进行电感耦合等离子体分析，以及对烧结灰进行扫描电子显微镜和能量色散 X 射线光谱分析，研究了 ES 中镍和氯元素的迁移和转化机制。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.