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摘要:
本文主要研究了影响测定三水铝土矿中活性硅含量的因素。活性硅是三水铝土矿的一个重要指标，利用电感耦合等离子体发射光谱建立测定三水铝土矿活性硅的方法。实验优化了样品前处理条件，确定了较佳称样量、溶样条件、氢氧化钠浓度和体积、定容体积、摇匀频次、煮沸时间等。结果表明，压力溶弹溶样能得到较好的检测结果。利用标准加入法，方法的回收率为99.13%~100.70%，方法的检出限为0.02 mg/L，相对标准偏差为0.0191%。本方法操作简便快速重复性好，准确度高，可以满足三水铝土矿活性硅含量的检测工作。
Abstract:This paper mainly studies the factors affecting the determination of active silicon content in gibbsite. Active silicon is an important index of gibbsite. A method for the determination of active silicon in gibbsite was established by inductively coupled plasma atomic emission spectrometry (ICP-AES). The sample pretreatment conditions were optimized, and the optimal sample weight, sample dissolution conditions, sodium hydroxide concentration and volume, constant volume, shaking frequency and boiling time were determined. The results show that the pressure dissolution sample can get better detection results. The recovery of the method is 99.13%~100.70%, the detection limit is 0.02 mg/L, and the relative standard deviation is 0.0191%. The method is simple, rapid, reproducible and accurate, which can be used for the determination of active silicon content in gibbsite.
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Key words:
- Gibbsite /
- Active silicon /
- Pretreatment
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表 1 样品称样量、定容和分取体积对活性硅含量的影响
Table 1. Effect of sample weight, constant and partition volume on active silicon content
称样量/g 分取体积/mL 定容体积/mL SiO2/% 0.4921 不分取 250 4.35 0.4991 不分取 250 4.40 1.0065 分取10 2500 4.48 1.0044 分取10 2500 4.52 
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表 2 氢氧化钠的浓度和加入量对活性硅含量的影响
Table 2. Influence of sodium hydroxide concentration and addition amount on active silicon content
氢氧化钠浓度/(g·L−1) 氢氧化钠用量/mL SiO2/% 64.5 10 2.81，2.84 64.5 20 2.79，2.80 90.0 10 2.86，2.83 90.0 5 2.77，2.80
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表 3 加标回收率实验
Table 3. Standard recovery test
SiO2含量/(mg·L−1) 加标量
/(mg·L−1)加标后测量值
/(mg·L−1)回收率
/%8.87 8 16.80 99.13 16 24.95 100.50 19.56 10 29.63 100.70 20 39.42 99.30
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[1] 宋波. 世界铝土矿及氧化铝发展趋势[J]. 封面报道, 2020(5):1-2.
SONG B. The development trend of bauxite and alumina in the world[J]. Cover Report, 2020(5):1-2.
[2] 刘琼霞, 单志强. 广西某铝土矿Bayer-CaO法溶出试验[J]. 矿产综合利用, 2019(3):27-30.
LIU Q X, SHAN Z Q. Tests on the lime-bayer dissolving method for the bauxite from Guangxi Taiping mining area[J]. Multipurpose Utilization of Mineral Resources, 2019(3):27-30.
[3] 奥地利安东帕公司. 铝钒土中有效铝和活性硅的测定[J]. 岩矿测试, 2007, 26(2):170-171.
Austrian Anton Paar Company. Determination of available aluminum and active silicon in bauxite[J]. Rock and Mineral Test, 2007, 26(2):170-171.
[4] 杨惠玲, 班俊生, 夏辉王, 等. 微波消解电感耦合等离子发射光谱法测定三水铝土矿中的有效铝、活性铝和活性硅[J]. 岩矿测试, 2017, 36(3):246-251. doi: 10.15898/j.cnki.11-2131/td.201606120083
YANG H L, BAN J S, XIA H W, etc. Microwave digestion inductively coupled plasma emission spectrometry for the determination of available aluminum, active aluminum and active silicon in bauxite[J]. Rock and Mineral Testing, 2017, 36(3):246-251. doi: 10.15898/j.cnki.11-2131/td.201606120083
[5] 胡四春, 赵恒勤, 马化龙, 等. 海南某三水铝石型铝土矿常压溶出试验研究[J]. 矿冶工程, 2012, 32(S):107-109.
HU S C, ZHAO H Q, MA H L, et al. Atmospheric dissolution test of a gibbsite-type bauxite in Hainan[J]. Mining and Metallurgical Engineering, 2012, 32(S):107-109.
[6] 毛鹏, 李林海. 三水铝石质量评价试验条件选择及矿碱消耗测算[J]. 世界有色金属, 2019, 16(4):4-6. doi: 10.3969/j.issn.1002-5065.2019.16.002
MAO P, LI L H. Selection of gibbsite quality evaluation test conditions and calculation of mineral alkali consumption[J]. World Nonferrous Metals, 2019, 16(4):4-6. doi: 10.3969/j.issn.1002-5065.2019.16.002
[7] 陈燕清. 广西某高硫高铁铝土矿拜耳法溶出试验研究[J]. 矿产综合利用, 2019(2):46-50. doi: 10.3969/j.issn.1000-6532.2019.02.009
CHEN Y Q. Investigation on the Bayer dissolving method for high-sulfur and iron bauxite in Guangxi[J]. Multipurpose Utilization of Mineral Resources, 2019(2):46-50. doi: 10.3969/j.issn.1000-6532.2019.02.009
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