化工进展 ›› 2019, Vol. 38 ›› Issue (10): 4767-4772.DOI: 10.16085/j.issn.1000-6613.043

• 资源与环境化工 • 上一篇    下一篇

半干法镁基脱硫产物的水浸处理

曲迪(),高桂林,丁涵,曹大力()   

  1. 沈阳化工大学材料科学与工程学院,辽宁 沈阳 110142
  • 收稿日期:2019-01-28 出版日期:2019-10-05 发布日期:2019-10-05
  • 通讯作者: 曹大力
  • 作者简介:曲迪(1996—),男,硕士研究生,研究方向为固体废物资源化利用、环保材料。E-mail:321654201@qq.com
  • 基金资助:
    共伴生有色金属资源加压湿法冶金技术国家重点实验室项目(yy2016007)

Water soaking treatment of semi-dry magnesium desulfurization products

Di QU(),Guilin GAO,Han DING,Dali CAO()   

  1. College of Materials Science and Engineering, Shenyang University of Chemical Technology, Shenyang 110142, Liaoning, China
  • Received:2019-01-28 Online:2019-10-05 Published:2019-10-05
  • Contact: Dali CAO

摘要:

目前镁基脱硫产物的处理主要集中在湿法镁基脱硫产物,在半干法镁基脱硫产物的处理利用方面少有报道。为了解决这一问题,本文采用了水浸泡的方法对半干法镁基脱硫产物进行处理,研究浸泡次数、浸泡温度和浸泡时间对脱硫产物的影响,通过X射线衍射仪(XRD)、扫描电子显微镜(SEM)、X射线荧光光谱仪(XRF)对产物进行分析。结果表明:水浸后的脱硫产物分为水溶液、固体块状物和沉渣三部分。溶液中的溶质主要是硫酸镁和氯化镁,第一次浸泡硫酸镁和氯化镁的浸出量达8.85%,远高于第二次浸泡的2.33%,浸泡温度为70℃时得到的硫酸镁和氯化镁比室温和50℃多0.14%~3%,浸泡3天后溶液密度几乎不再变化;固体块状物主要成分为氢氧化镁和少量的硫酸盐和氯化物;沉渣主要成分是氢氧化镁。水浸处理可以完成脱硫产物的再利用。

关键词: 脱硫产物, 浸泡, 回收, 硫酸镁, 六水氯化镁, 氢氧化镁

Abstract:

The treatment of magnesium-based desulfurization products was concentrated on wet magnesium-based desulfurization products, and few reported on the treatment and utilization of semi-dry magnesium-based desulfurization products. In order to solve this problem, the semi-dry magnesium-based desulfurization product was soaked in water. The effects of soaking times, soaking temperature and soaking time on the desulfurization products were studied. The products were analyzed by X-ray diffraction (XRD), scanning electron microscopy (SEM), and X-ray fluorescence spectrometer (XRF).The results showed that the desulfurization products were divided into three parts after water immersion: aqueous solution, solid mass and sediment. The solute is magnesium chloride and magnesium sulfate in the solution, magnesium sulfate and magnesium chloride obtained in the first soaking account for 8.85% of the solution mass, which is much higher than 2.33% of the second soaking. When the immersion temperature is 70℃, the obtained magnesium sulfate and magnesium chloride are 0.14 to 3% more than room temperature and 50℃, there is almost no change in the density of the solution after soaking for three days. The solid mass is composed of Mg(OH)2 and a small amount of sulfate and chloride. The component of the sediment is Mg(OH)2. The water soaking treatment can complete the reuse of the desulfurization products.

Key words: desulfurization product, soaking, recovery, magnesium sulfate, magnesium chloride hexahydrate, magnesium hydroxide

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