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Gold Science and Technology ›› 2018, Vol. 26 ›› Issue (5): 669-676.doi: 10.11872/j.issn.1005-2518.2018.05.669

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Research on Mechanical Activation Properties and Leaching Test of Arseno-pyrite

Yanhua LIU,Guobao CHEN*,Hongying YANG,Zhenan JIN,Gairong WANG   

  1. 1School of Metallurgy，Northeastern University，Shenyang 110819，Liaoning，China
  • Received:2018-08-01 Revised:2018-09-07 Online:2018-10-20 Published:2018-10-31
  • Contact: Guobao CHEN

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Abstract:

The effect of a new pretreatment method i.e. mechanical activation on the solid-state and dissolution properties of arsenopyrite was studied.In a planetary ball mill，arsenopyrite was mechanically activated for 1 h at different grinding speeds.The analysis of particle size and specific surface area indicated that the particle size of arsenopyrite decreased rapidly at first and then increased slightly with increase of milling speed.The optimum particle distribution，minimum particle size value of 2.36 μm and maximum specific surface area of 2.667 m2/g can be observed at milling speed of 300 r/min.The morphology of arsenopyrite at different milling speeds was observed by scanning electron microscopy（SEM），and it was found that the surface of arsenopyrite formed micro-nano particles and amorphization degree significantly increased with the increase of milling speed.XRD（X-ray diffraction）analysis results showed that with the increase of milling speed，no phase transformation occured，but the amorphization degree of arsenopyrite increased to 72%， lattice distortion increased from 0.014% to 0.097%，and crystallite size decreased from 75.6 nm to 56.0 nm.The characteristic peaks of 217.2 cm-1and 273.7 cm-1of arsenopyrite were analyzed by Raman spectroscopy.It was found that the vibration of the characteristic peak located at 273.7 cm-1was more sensitive to the mechanical stress.Finally，the leaching tests of arsenopyrite were carried out by Fe2（SO4）3solution.The results showed that contrasted with unactivated arsenopyrite，total arsenic extraction from arsenopyrite has doubled to nearly 48.74% under the optimum milling speed of 300 r/min.

Key words: arsenopyrite, mechanical activation, structural analysis, Raman spectroscopy, ferric sulfate, milling speed, amorphousity, leaching test

CLC Number: 

  • TF11

Table 1

XRF analysis results of sample（%）"

成分 含量 成分 含量
As 32.54 Al 0.20
Fe 28.48 Ca 0.07
S 21.90 Zn 0.06
Mg 15.74 Mn 0.03
Si 0.95 K 0.01

Table 2

Quantitative analysis results of main element"

元素 含量 元素 含量
As 45.60 Si 0.85
Fe 31.20 Mg 0.06
S 20.50

Fig.1

XRD patterns of sample"

Fig.2

Relationship between BET value,median diameter and milling speed"

Fig.3

SEM photographs at different milling speeds"

Fig.4

SEM and EDS analysis under different milling speeds"

Fig.5

Particle distribution of arsenopyrite under different milling speeds"

Fig.6

XRD patterns of arsenopyrite at different milling speeds"

Fig.7

Variation of X-ray amorphization degree of arsenopyrite with milling speed"

Table 3

Crystal parameters of arsenopyrite at different milling speeds"

样品 晶胞体积/(?3) 平均晶粒尺寸/nm 平均最大应变/%
a 175.09 75.6 0.014
b 174.38 72.8 0.017
c 175.19 59.0 0.022
d 175.69 64.5 0.097

Fig.8

Raman spectrum of arsenopyrite at different milling speeds"

Fig.9

Relationship between Raman characteristic peaks and milling speeds"

Fig.10

Relationship between leaching rate of total arsenic and leaching time under different milling speeds"

1 Akhgar B N ， Pourghahramani P. Impact of mechanical activation and mechanochemical activation on natural pyrite dissolution［J］.Hydrometallurgy，2015，153（5）：83-87.
2 Espitia S L M ， Lapidus G T . Pretreatment of a refractory arsenopyritic gold ore using hydroxyl ion［J］.Hydrometallurgy，2015，153（2）：106-113.
3 王帅，李超，李宏煦. 难浸金矿预处理技术及其研究进展［J］.黄金科学技术，2014，22（4）：129-134.
Wang Shuai ， Li Chao ， Li Hongxu . Research progress of pretreatment technologies of refractory gold ores［J］.Gold Science and Technology，2014，22（4）：129-134.
4 黄怀国，张卿，林鸿汉. 难选冶金矿提取工艺工业应用现状［J］.黄金科学技术，2013，21（1）：71-77.
Huang Huaiguo ， Zhang Qing ， Lin Honghan . Research and application status of extraction technology for the refractory gold ore［J］.Gold Science and Technology，2013，21（1）：71-77.
5 Li Q C ， Li D X ， Qian F J . Pre-oxidation of high-sulfur and high-arsenic refractory gold concentrate by ozone and ferric ions in acidic media［J］.Hydrometallurgy，2009，97（1/2）：61-66.
6 刘志楼，杨天足. 难处理金矿的处理现状［J］.贵金属，2014，35（1）：79-83，89.
Liu Zhilou ， Yang Tianzu . Treatment status for refractory gold ores［J］.Precious Metals，2014，35（1）：79-83，89.
7 孙留根，袁朝新，王云，等. 难处理金矿提金的现状及发展趋势［J］.有色金属（冶炼部分），2015（4）：38-43.
Sun Liugen ， Yuan Chaoxin ， Wang Yun ，et al. Status and development of gold extraction from refractory gold ore［J］.Nonferrous Metals（Extractive Metallurgy），2015（4）：38-43.
8 Baláž P ， Baláž M ， Shpotyuk O ，et al. Properties of arsenic sulphide（β-As4S4）modified by mechanical activation［J］.Journal of Materials Science，2017，52（3）：1747-1758.
9 刘艳华，陈国宝，杨洪英，等. 机械活化强化载金硫化矿浸出的研究进展［J］.有色金属（冶炼部分），2018（3）：49-54.
Liu Yanhua ， Chen Guobao ， Yang Hongying ，et al. Research progress on enhanced leaching process of gold-bearing sulfide ores by mechanical activation［J］.Nonferrous Metals（Extractive Metallurgy），2018（3）：49-54.
10 Hu H P ， Chen Q Y ， Yin Z L ，et al. Mechanism of mechanical activation for sulfide ores［J］.Transactions of Nonferrous Metals Society of China，2007，17（1）：205-213.
11 Jones G C ， Corin K C ， Hille R P V ，et al. The generation of toxic reactive oxygen species（ROS）from mechanically activated sulphide concentrates and its effect on thermophilic bioleaching［J］.Minerals Engineering，2011，24（11）：1198-1208.
12 Pourghahramani P ， Akhgar B N . Characterization of structural changes of mechanically activated natural pyrite using XRD line profile analysis［J］.International Journal of Mineral Processing，2015，134：23-28.
13 Li X H ， Zhang Y J ， Pan L P ，et al. Effect of mechanical activation on dissolution kinetics of neutral leach residue of zinc calcine in sulphuric acid［J］.Transactions of Nonferrous Metals Society of China，2013，23（5）：1512-1519.
14 Pourghahramani P ， Forssberg E. Microstructure characterization of mechanically activated hematite using XRD line broadening［J］.International Journal of Mineral Processing，2006，79（2）：106-119.
15 Ohlberg S M ， Strickler D W . Determination of percent crystallinity of partly devitrified glass by X-Ray diffraction［J］.Journal of the American Ceramic Society，1962，45（4）：170-171.
16 吴胜利，常凤，张建良，等. 机械活化烧结粉尘和高炉粉尘的物理化学性质［J］.钢铁，2017，52（4）：84-93.
Wu Shengli ， Chang Feng ， Zhang Jianliang ，et al. Changes in physical chemical properties of sintering dust and blast furnace dust by machanical activation［J］.Iron and Steel，2017，52（4）：84-93.
17 Mcguire M M ， Jallad K N ， Ben-Amotz D ，et al. Chemical mapping of elemental sulfur on pyrite and arsenopyrite surfaces using near-infrared Raman imaging microscopy［J］.Applied Surface Science，2001，178（1/2/3/4）：105-115.
18 Santos E C D ， Lourenco M P ， Pettersson L G M ，et al. Stability，structure，and electronic properties of the pyrite/arsenopyrite solid-solid interface-A DFT study［J］.Journal of Physical Chemistry C，2017，121（14）：8042-8051.
19 Lara R H ， Velázquez L J ， Vazquezarenas J ，et al. Arsenopyrite weathering under conditions of simulated calcareous soil［J］.Environmental Science and Pollution Research，2016，23（4）：3681-3706.
20 Courtinnomade A ， Bril H ， Beny J M ，et al. Sulfide oxidation observed using micro-Raman spectroscopy and micro-X-ray diffraction：The importance of water/rock ratios and pH conditions［J］.American Mineralogist，2010，95（4）：582-591.
[1] Wang Zhoutan. ON THE IMPROVING AU RATIO LEACHED BY HEATING AND RAISING PERMEABILITY [J]. J4, 1998, 6(4): 38-44.
[2] . [J]. J4, 1998, 6(3): 34-40.
[3] CHEN Dong-Zhi, LI Jin-Jun. The Foam Plastics Concentrate the Atomic Absorption Law to Measure the Gold Certain Technical Question [J]. J4, 2005, 13(1-2): 88-90.
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