响应面法优化草酸-草酸铵协同浸出氰化尾渣中赤铁矿的工艺

doi:10.13228/j.boyuan.issn1006-9356.20230324

Abstract
Figure/Table
References
Related Citation (15)

Download: PDF (5851 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract In order to obtain the optimal parameters of synergistic leaching hematite from cyanide tailings using H₂C₂O₄ and (NH₄)₂C₂O₄, response surface polynomial regression model for predicting iron leaching rate was established, and response surface method(RSM) was used to obtain the best conditions for leaching hematite from cyanide tailings based on the results of single factor experiments, and the iron removal mechanism was also discussed. The results show that the optimum conditions for iron removal by H₂C₂O₄ and (NH₄)₂C₂O₄are as follows, the molar ratio of H₂C₂O₄ and (NH₄)₂C₂O₄ is 0.98, the excess times of C₂O^2-₄ is 1.4 times of the theoretical amount, the leaching temperature is 90 ℃, and the leaching time is 65 min. The influence of various factors on the iron removal effect from large to small is the excess times of C₂O^2-₄, leaching temperature, the molar ratio of H₂C₂O₄ and (NH₄)₂C₂O₄, leaching time, among which the most significant interaction is obtained between the molar ratio of H₂C₂O₄ and (NH₄)₂C₂O₄ and leaching temperature. Under the optimum conditions, the actual and predicted leaching rate of iron are 96.30% and 97.72%, respectively, a relative error is only -1.47%, indicating that the optimized process parameters by this model are reliable. The acidity of H₂C₂O₄ and the complexation of C₂O^2-₄ to Fe³⁺ should be considered at the same time in process of high efficiency iron removal using H₂C₂O₄ and (NH₄)₂C₂O₄, and ensure that Fe³⁺ in the leachate exists in the form of Fe(C₂O₄)^3-₃. This study provides the theoretical and technical support for efficient consumption and resource utilization of cyanide tailings, and also has the important reference significance for the enrichment of valuable metals such as gold and silver in sulfuric acid cinder and gold calcine.

Key words： roasted cyanide tailings leach hematite response surface method optimize mechanism

Received: 22 May 2023

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	DANG Xiaoe
	LIU Anquan
	LI Linbo
	ZHANG Ting

Cite this article:

DANG Xiaoe,LIU Anquan,LI Linbo等. Process optimization for oxalic acid and ammonium oxalate synergistic leaching of hematite from cyanide tailings by response surface method[J]. China Metallurgy, 2023, 33(10): 105-115.

URL:

http://www.zgyj.ac.cn/EN/10.13228/j.boyuan.issn1006-9356.20230324 OR http://www.zgyj.ac.cn/EN/Y2023/V33/I10/105

[1]	刘汉钊. 国内外难处理金矿焙烧氧化现状和前景[J]. 国外金属矿选矿,2005(7):5.
[2]	寇文胜. 难浸金精矿两段焙烧工艺金氰化浸出率的研究与实践[J]. 黄金,2012,33(5):47.
[3]	丘世澄,胡真,邱显扬. 焙烧氰化尾渣提金工艺研究现状[J]. 贵金属,2019,40(3):84.
[4]	张永峰,武鑫. 两段焙烧工艺在黄金生产中的应用[J]. 中国有色冶金,2010,39(5):37.
[5]	袁嘉声,畅永锋,郑春龙,等. 氰化尾渣脱氰综述[J]. 中国有色金属学报,2021,31(6):1568.
[6]	傅平丰,边振忠,冯杰. 一种焙烧氰化尾渣中金银铁回收及同步无害化的方法:中国,201610846576. 9[P]. 2018-07-24.
[7]	李育彪,陈坤,郑仁军. 氰化尾渣脱氰技术及有价金属回收研究进展[J]. 矿产保护与利用,2021(1):91.
[8]	常越亚. 水泥窑协同处置氰化尾渣过程污染物的监管评价[J]. 新世纪水泥导报,2020,26(5):77.
[9]	孙常生. 我国水泥窑协同处置危废行业发展现状及未来发展趋势分析[J]. 建材发展导向,2019(17):1672.
[10]	LONG H L,LI H Y,PEI J N,et al. Cleaner recovery of multiple valuable metals from cyanide tailings via chlorination roasting[J]. Separation Science and Technology,2021,56(12):2113.
[11]	WANG W W,LI Z Y. Recovery and kinetics of gold and iron from cyanide tailings by one-step chlorination-reduction roasting[J]. Minerals Engineering,2020,155:1.
[12]	CHEN D,GUO H W,XU J F,et al. Recovery of iron from cyrite cinder containing non-ferrous metals using high-temperature chloridizing-reduction-magnetic separation[J]. Metallurgical and Materials Transactions B-Process Metallurgy and Materials Processing Science,2017,48(2):933.
[13]	孙彦文,袁朝新,郭持皓,等. 氰化尾渣熔融氯化提金银试验[J]. 矿冶,2019,28(6):41.
[14]	刘志建,金哲男,王保仁,等. 黄金冶炼氰渣火法处理研究现状及展望[J]. 有色金属(冶炼部分),2021(1):84.
[15]	谢龙臣,彭红葵,陈志坚,等. 用于协同处理焙烧氰化尾渣和含铜污泥的系统:中国,202122805906.9[P]. 2022-05-10.
[16]	孙留根,常耀超,徐晓辉,等. 氰化尾渣无害化、资源化利用的主要技术现状及发展趋势[J]. 中国资源综合利用,2017,35(10):59.
[17]	史娟华, 于先进,张亚莉. 氯化钠-次氯酸钠法从氰化渣中回收金[J]. 有色金属(冶炼部分), 2013(3):35.
[18]	尚军刚,李林波,刘佰龙. 高酸浸出处理氰化尾渣的实验研究[J]. 金属材料与冶金工程,2012,40(1):30.
[19]	马红周,王丁丁,王耀宁,等. 硫酸熟化法浸出焙烧氰化尾渣中的铁[J]. 有色金属(冶炼部分),2020(10):19.
[20]	郑雅杰,龚昶,孙召明. 氰化尾渣还原焙烧酸浸提铁及氰化浸金新工艺[J]. 中国有色金属学报,2014,24(9):2426.
[21]	金程,李登新. 硫酸烧渣还原浸取铁[J]. 有色金属(冶炼部分),2012(1):9.
[22]	王威,高照国,曹耀华,等. 提高含砷金精矿二段焙砂金浸出率的研究[J]. 中国矿业,2015,24(7):104.
[23]	杨保俊,方晓宇,王百年,等. 草酸助剂强化酸浸法提取硫酸烧渣中的铁[J]. 化工进展,2019,38(3):1552.
[24]	党晓娥,刘安全,边道超. 草酸配位浸出二段焙砂中包裹金的赤铁矿[J]. 贵金属,2020,41(2):29.
[25]	高凌宇,杨喜云,吴玉楼,等. 基于Box-Behnken响应面法优化蛇纹石富硅渣制备硅酸钠工艺[J]. 中南大学学报(自然科学版),2022,53(10):3802.
[26]	党晓娥,张婷. Fe3+-C2O2-4-H2O溶液中Fe(III)的形态分布及其在硫酸烧渣和氰化尾渣除铁过程中的应用[J/OL]. 化工进展. [2023-03-17].https://www.cnki.com.cn/Article/CJFDTotal-HGJZ20230315002.htm.