双酸法提取硫铁矿烧渣中铁.pdf

第61卷第7期
化
报
2013年7月
CIES
硏究论文
双酸法提取硫鉷矿烧渣中鉷
健”,刘宗宽”,张磊,贺廷崄
西安交通大学人届环境与建筑程学院,陕西西安710049;2西交交通大学化学1程与技术学院,陕西西交710049)
摘要:应用硫酸-盐酸混酸浸出凹收硫佚矿烧渣屮的铁,探讨了要因素对铁浸取率的影响,确定了最佳浸取条
件。结果表明,各因素对铁浸取率影响的著性为:硫酸浓度>盐酸用量>浸取时间>硫酸过量系数;提高反
应体系温度,増加盐酸用量均能提铁的浸取率,而硫酸浓度、反应时问以及硫酸过量系数对铁浸取率存在最
佳值。在反应体系沸腾温度为118~125℃.浸取时间为3h?硫酸浓度为50%~60%,盐酸用量为0.25ml?(
烧渣),硫酸过量系数为1.2的条件下,硫酸烧渣中铁的浸収率达到93.1%,明显高于单一酸的浸収率,提高
了铁的资源综合利用率。
关鍵词:硫佚矿烧渣:浸収悴:双酸酸没;硫酸;正交实验
DOI:10.3969/j.issn.()4138-1157.2013.07.042
中图分类号:TQ111.19
文献标志码:A
文章编号:0438-1157(2013)07-2619-06
Iron extraction from pyrite cinder by mixed acid
LIU Pei', JANG Jian, LIU Zongkuan', ZHANG Le, HE Yanling
(School of Human Settlements and Civil Engineering. Xi Jiaotong University, Xi 71009, Shaanxi, China
School o/Chemical Engineering and Technology, Xi'anjiaotong niversity, Xi'an 710049, Shaani, China)
Abstract Extraction of iron from pyrite cinder by mixed acid of sulfuric acid and hydrochloric acid, and
main factors influencing iron leaching rate were investigated. In order to analyze fcasibility of extraction of
iron from pyrite cinder, the main elements were determined by using X-ray fluorescence spectrum analyzer
(XRF). The crystal type of iron oxide in the pyrite cinder was also analyzed by X-ray diffraction(XRD)
to understand the presence forms of iron in pyrite cinder. First, 10 g dried pyrite cinder were added to a
50 ml three-necked flask. Then, sulfuric acid and hydrochloric acid of specified concentration and quantity
were gradually added into the flask under proper stirring, and were kept at a specific temperature for
seyeral hours. After filtration. the solution was diluted to 250 ml with distilled water. The diluted solution
was used for determination of iron content in leacheate using the stannous chloride-mercury chloride
potassium dichromate method. At last extraction conditions were optimized. The results showed that the
significances of each factor on iron extraction were as follows: concentration of sulfuric acid-hydrochloric
acid amount-reaction time sulfuric acid over-dose coefficient. Iron extraction rate increased with higher
reaction temperature and increasing amount of hydrochloric acid. However, there existed an optimum
2012-11-02收釧初稿,2012-12-25收到修改稿。
Received date. 2012
联系人:贺延龄。第一作者:刘培(1982-),女,倾上研
Corresponding author: Prof. HE Yanling, heyl (G mail. xitu
究生。
du. cn
基金项目:洲河关中段1业点源水污染物减排技术研究集成
Foundation item: supported by the Pollutant Emission
示范项目(2011 KTZBO3-03-01):油出采油废水回注处理的关键技 Reduction Technology Integration Demonstration of Industrial Poi
术研究项目(2011KTCI03-06)
Source of Weihe in Guanzhong (2011KTZB03-03-01)and the Key
Technology Research of Reinjection Treatment for Oilfield
Wastewater (20115TCL03-06)