工程科学学报，第40卷，第9期：1036-1042,2018年9月 Chinese Journal of Engineering,Vol.40,No.9:1036-1042,September 2018 DOI:10.13374/j.issn2095-9389.2018.09.003;http://journals.ustb.edu.cn 响应曲面法优化Na,S-NaOH体系浸出硫酸烧渣中的砷 王永良”，肖力12”，付国燕20，刘娅2”，韩培伟”，钱鹏”，叶树峰)四， 陈运法) 1)中国科学院过程工程研究所多相复杂系统国家重点实验室，北京1001902)中国科学院大学化学与化工学院，北京100049 ☒通信作者，E-mail:se@ipe.ac.cn 摘要硫酸烧渣作为重要的二次资源，除砷有利于提高烧渣的价值.针对某含砷硫酸烧渣预处理脱砷的问题，采用N,S一 NaOH体系浸出烧渣中的砷.首先采用单因素试验确定Na,S和NOH的药剂用量范围，进而采用响应曲面法优化浸出工艺参 数.结果显示，响应曲面法优化Na,S-NaOH体系中浸出砷的模型显著，Na,S、NaOH和温度均对砷的浸出有着重要影响，且温 度越高越有利于砷的浸出，Na,S和Na0H之间存在明显的交互作用，在80℃、Na0H浓度为0.34malL'、Na,S浓度为0.12 mol·L1时，浸出后烧渣中的砷质量分数可以降低到0.08%. 关键词硫酸烧渣：砷：响应曲面：浸出：预处理 分类号TD98 Arsenic removal from pyrite cinders in Na,S-NaOH solution with parameters optimized using the response surface methodology WANG Yong-Hliang'',XLAO2,FU Guo-yan.a,LIU Ya,HAN Pei--ei,QIAN Peng》,YE Shu-feng)回，CHEN Yun-fa》 1)State Key Laboratory of Multiphase Complex Systems,Institute of Process Engineering,Chinese Academy of Sciences,Beijing 100190,China 2)School of Chemistry and Chemical Engineering,University of Chinese Academy of Sciences,Beijing 100049,China Corresponding author,E-mail:sfye@ipe.ac.cn ABSTRACT Pyrite cinder is one of the important secondary resources:however,the arsenic typically contained in pyrite cinder is harmful to metallurgical process.The removal of arsenic can improve the value of pyrite cinders.Thus,a pretreatment method for re- moval of arsenic from pyrite cinders using a Na,S-NaOH solution was investigated in this paper.A single factor experiment was con- ducted to determine the appropriate concentration ranges of NaOH and NaS,and then the response surface methodology (RSM)was used to optimize the leaching parameters.The results indicate that the optimized RSM model is reliable.The temperature,NaOH con- centration,and Na,S concentration have significant effects on the arsenic removal.The higher temperature is found to be favorable to the leaching of arsenic,and a significant interaction is found between the concentrations of NaOH and Na,S.The content of arsenic in the leaching slag can be reduced to 0.08%at 80 C when the concentration of NaOH and NaS is 0.34 and 0.12 mol.L, respectively. KEY WORDS pyrite cinder;arsenic:response surface methodology;leaching:pretreatment 硫酸烧渣是硫铁矿生产硫酸过程中产生的废中国，至少有30%的硫酸是通过焙烧硫铁矿生产 渣，每生产1t硫酸，就要排出0.7~1.0t的烧渣.在的，每年会产生超过1000万t烧渣1-习.其中，大约 收稿日期：2017-09-12 基金项目：国家高技术研究发展计划资助项目(2011AA06A104):十二五国家科技支撑计划资助项目(2012BAB08B04)工程科学学报，第 40 卷，第 9 期: 1036--1042，2018 年 9 月 Chinese Journal of Engineering，Vol． 40，No． 9: 1036--1042，September 2018 DOI: 10． 13374 /j． issn2095--9389． 2018． 09． 003; http: / /journals． ustb． edu． cn 响应曲面法优化 Na2 S--NaOH 体系浸出硫酸烧渣中的砷 王永良1) ，肖 力1，2) ，付国燕1，2) ，刘 娅1，2) ，韩培伟1) ，钱 鹏1) ，叶树峰1) ， 陈运法1) 1) 中国科学院过程工程研究所多相复杂系统国家重点实验室，北京 100190 2) 中国科学院大学化学与化工学院，北京 100049 通信作者，E-mail: sfye@ ipe． ac． cn 摘 要 硫酸烧渣作为重要的二次资源，除砷有利于提高烧渣的价值． 针对某含砷硫酸烧渣预处理脱砷的问题，采用 Na2 S-- NaOH 体系浸出烧渣中的砷． 首先采用单因素试验确定 Na2 S 和 NaOH 的药剂用量范围，进而采用响应曲面法优化浸出工艺参 数． 结果显示，响应曲面法优化 Na2 S--NaOH 体系中浸出砷的模型显著，Na2 S、NaOH 和温度均对砷的浸出有着重要影响，且温 度越高越有利于砷的浸出，Na2 S 和 NaOH 之间存在明显的交互作用，在 80 ℃、NaOH 浓度为 0. 34 mol·L － 1、Na2 S 浓度为 0. 12 mol·L － 1时，浸出后烧渣中的砷质量分数可以降低到 0. 08% ． 关键词 硫酸烧渣; 砷; 响应曲面; 浸出; 预处理 分类号 TD98 收稿日期: 2017--09--12 基金项目: 国家高技术研究发展计划资助项目( 2011AA06A104) ; 十二五国家科技支撑计划资助项目( 2012BAB08B04) Arsenic removal from pyrite cinders in Na2 S--NaOH solution with parameters optimized using the response surface methodology WANG Yong-liang1) ，XIAO Li1，2) ，FU Guo-yan1，2) ，LIU Ya1，2) ，HAN Pei-wei1) ，QIAN Peng1) ，YE Shu-feng1)  ，CHEN Yun-fa1) 1) State Key Laboratory of Multiphase Complex Systems，Institute of Process Engineering，Chinese Academy of Sciences，Beijing 100190，China 2) School of Chemistry and Chemical Engineering，University of Chinese Academy of Sciences，Beijing 100049，China  Corresponding author，E-mail: sfye@ ipe． ac． cn ABSTＲACT Pyrite cinder is one of the important secondary resources; however，the arsenic typically contained in pyrite cinder is harmful to metallurgical process． The removal of arsenic can improve the value of pyrite cinders． Thus，a pretreatment method for re￾moval of arsenic from pyrite cinders using a Na2 S--NaOH solution was investigated in this paper． A single factor experiment was con￾ducted to determine the appropriate concentration ranges of NaOH and Na2 S，and then the response surface methodology ( ＲSM) was used to optimize the leaching parameters． The results indicate that the optimized ＲSM model is reliable． The temperature，NaOH con￾centration，and Na2 S concentration have significant effects on the arsenic removal． The higher temperature is found to be favorable to the leaching of arsenic，and a significant interaction is found between the concentrations of NaOH and Na2 S． The content of arsenic in the leaching slag can be reduced to 0. 08% at 80 ℃ when the concentration of NaOH and Na2 S is 0. 34 and 0. 12 mol·L － 1， respectively． KEY WOＲDS pyrite cinder; arsenic; response surface methodology; leaching; pretreatment 硫酸烧渣是硫铁矿生产硫酸过程中产生的废 渣，每生产 1 t 硫酸，就要排出 0. 7 ～ 1. 0 t 的烧渣． 在 中国，至少有 30% 的硫酸是通过焙烧硫铁矿生产 的，每年会产生超过 1000 万 t 烧渣［1--2］． 其中，大约