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A chrysoberyl-type beryllium ore from Xinjiang, containing 0.102% Be with quartz as the dominant gangue mineral, was taken in an experimental study on sulfuric acid leaching. According to the Box-Behnken experimental design principle, a multivariate regression equation was established by using response surface methodology (RSM) for three influencing factors of leaching effect, including liquid-solid ratio, leaching time and leaching temperature, as well as their interactions. Based on the test of significance of regression equation, the optimum process conditions were determined as follows: roasting temperature of 900 ℃, roasting time of 3 h, sulfuric acid concentration of 50%, liquid-solid ratio of 3.2∶1, leaching time of 4.8 h and leaching temperature of 90 ℃. Under these conditions, the Be leaching rate is predicted to be 89.73%, and an average value is 89.10% based on three parallel experiments, indicating that the established model is accurate. A kinetic model of leaching revealed that the leaching process was controlled by interfacial chemical reactions, with an apparent activation energy at 50.42 kJ/mol.
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新疆某地金绿宝石型铍矿中铍质量分数0.102%,脉石矿物主要为石英。以硫酸为浸出剂,对铍进行酸浸实验研究,通过响应曲面法,利用Box-Behnken设计方法建立了影响浸出效果的3个主要因素(液固比、浸出时间、浸出温度)以及三者之间交互作用的多元回归方程,并对该回归方程进行了显著性检验。确定较佳工艺条件为:焙烧温度900 ℃、焙烧时间3 h、硫酸质量浓度50%、液固比3.2∶1、浸出时间4.8 h、浸出温度90 ℃,此条件下铍浸出率预测值为89.73%,3组平行实验铍浸出率平均值为89.10%,二者偏差较小,表明模型准确。浸出动力学模型拟合结果表明,该浸出过程受界面化学反应控制,反应表观活化能为50.42 kJ/mol。
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庞丹丹(1983—),女,河南郑州人,讲师,硕士,主要从事宝石及材料工艺方面的研究。E-mail:pangdandan@haou.edu.cn
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庞丹丹(1983—),女,河南郑州人,讲师,硕士,主要从事宝石及材料工艺方面的研究。E-mail:pangdandan@haou.edu.cn
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1987., articleTitle=null, refAbstract=null)], funds=[Fund(id=1241327682340835569, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241321696318247922, awardId=232102320342, language=CN, fundingSource=河南省科技攻关项目(232102320342), fundOrder=null, country=null)], companyList=[AuthorCompany(id=1241327671280456299, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241321696318247922, xref=null, ext=[AuthorCompanyExt(id=1241327671288844908, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241321696318247922, companyId=1241327671280456299, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=Zhengzhou Vocational University of Information and Technology, Zhengzhou 450000, Henan, China), AuthorCompanyExt(id=1241327671305622126, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241321696318247922, companyId=1241327671280456299, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=郑州信息科技职业学院,河南 郑州 450000)])], figs=[ArticleFig(id=1241327675369902926, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241321696318247922, language=EN, label=Fig.1, caption=
XRD pattern of raw ore, figureFileSmall=4soyltKMw2VdXBorTwRjaQ==, figureFileBig=OVC6jhCvO/3q9WGjfRfUZw==, tableContent=null), ArticleFig(id=1241327675449594714, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241321696318247922, language=CN, label=图1, caption=
原矿XRD图谱, figureFileSmall=4soyltKMw2VdXBorTwRjaQ==, figureFileBig=OVC6jhCvO/3q9WGjfRfUZw==, tableContent=null), ArticleFig(id=1241327675562840935, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241321696318247922, language=EN, label=Fig.2, caption=
Comparison of actual and predicted leaching rates of beryllium, figureFileSmall=tWh73z1n/J/SYXMTu+W4SA==, figureFileBig=JH7fVNDA/fyXeAGBPT8new==, tableContent=null), ArticleFig(id=1241327675646727024, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241321696318247922, language=CN, label=图2, caption=
铍浸出率实际值与预测值对比结果, figureFileSmall=tWh73z1n/J/SYXMTu+W4SA==, figureFileBig=JH7fVNDA/fyXeAGBPT8new==, tableContent=null), ArticleFig(id=1241327675726418809, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241321696318247922, language=EN, label=Fig.3, caption=
Residual distribution of leaching rate, figureFileSmall=QneEj1gqc0O1JE0qzbSYOw==, figureFileBig=A5jgpLUNCBl3Nd77QWn9+Q==, tableContent=null), ArticleFig(id=1241327675831276422, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241321696318247922, language=CN, label=图3, caption=
浸出率残差分布情况, figureFileSmall=QneEj1gqc0O1JE0qzbSYOw==, figureFileBig=A5jgpLUNCBl3Nd77QWn9+Q==, tableContent=null), ArticleFig(id=1241327675994854293, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241321696318247922, language=EN, label=Fig.4, caption=
Effect of interaction between liquid-solid ratio and leaching time on leaching rate of beryllium, figureFileSmall=NhQp6If/qEXLO4AMlRsGYg==, figureFileBig=PnZEnrbVGL3kIdzzWRVjjw==, tableContent=null), ArticleFig(id=1241327677500609440, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241321696318247922, language=CN, label=图4, caption=
液固比与浸出时间交互作用对铍浸出率的影响(a)3D曲面图;(b)等高线图
, figureFileSmall=NhQp6If/qEXLO4AMlRsGYg==, figureFileBig=PnZEnrbVGL3kIdzzWRVjjw==, tableContent=null), ArticleFig(id=1241327677643215786, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241321696318247922, language=EN, label=Fig.5, caption=
Effect of interaction between liquid-solid ratio and leaching temperature on leaching rate of beryllium, figureFileSmall=xtEYui8N3nYAdyiWdgjTog==, figureFileBig=w7alGYrxZtXZvDg+K5LlRA==, tableContent=null), ArticleFig(id=1241327677756462008, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241321696318247922, language=CN, label=图5, caption=
液固比与浸出温度交互作用对铍浸出率的影响(a)3D曲面图;(b)等高线图
, figureFileSmall=xtEYui8N3nYAdyiWdgjTog==, figureFileBig=w7alGYrxZtXZvDg+K5LlRA==, tableContent=null), ArticleFig(id=1241327677907456962, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241321696318247922, language=EN, label=Fig.6, caption=
Effect of interaction between leaching temperature and leaching time on leaching rate of beryllium, figureFileSmall=n+gWIuepsqXP9JrC1OBmyg==, figureFileBig=Rzyxyg2L50nxAyCNAQUFCw==, tableContent=null), ArticleFig(id=1241327678020703178, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241321696318247922, language=CN, label=图6, caption=
浸出温度与浸出时间交互作用对铍浸出率的影响(a)3D曲面图;(b)等高线图
, figureFileSmall=n+gWIuepsqXP9JrC1OBmyg==, figureFileBig=Rzyxyg2L50nxAyCNAQUFCw==, tableContent=null), ArticleFig(id=1241327678142338004, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241321696318247922, language=EN, label=Fig.7, caption=
SEM image of leaching residue, figureFileSmall=a3dOdvZlWqm33m1eqercrA==, figureFileBig=cVVVn2mEp1xX5n4S/GG6fg==, tableContent=null), ArticleFig(id=1241327678272361438, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241321696318247922, language=CN, label=图7, caption=
浸出渣SEM图片, figureFileSmall=a3dOdvZlWqm33m1eqercrA==, figureFileBig=cVVVn2mEp1xX5n4S/GG6fg==, tableContent=null), ArticleFig(id=1241327678381413352, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241321696318247922, language=EN, label=Fig.8, caption=
Relationship between beryllium leaching rate and reaction time at different temperatures, figureFileSmall=mc472uBZyv+BXTv8ptL42w==, figureFileBig=iQOtRy97j4jFKYrnA3zmMw==, tableContent=null), ArticleFig(id=1241327678473688051, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241321696318247922, language=CN, label=图8, caption=
不同温度下铍浸出率与反应时间的关系, figureFileSmall=mc472uBZyv+BXTv8ptL42w==, figureFileBig=iQOtRy97j4jFKYrnA3zmMw==, tableContent=null), ArticleFig(id=1241327678607905790, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241321696318247922, language=EN, label=Fig.9, caption=
Fitting curves of 1-(1-X)1/3 to t, figureFileSmall=MLMnDjTq7q1GijZgG2IGag==, figureFileBig=Cf8+eWCPoHpW+axW1Gnvaw==, tableContent=null), ArticleFig(id=1241327678758899719, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241321696318247922, language=CN, label=图9, caption=
1-(1-X)1/3与t的拟合曲线, figureFileSmall=MLMnDjTq7q1GijZgG2IGag==, figureFileBig=Cf8+eWCPoHpW+axW1Gnvaw==, tableContent=null), ArticleFig(id=1241327678909894672, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241321696318247922, language=EN, label=Fig.10, caption=
Fitting curves of 1-2/3X-(1-X)2/3 to t, figureFileSmall=yIFmFbC5T6uRfFhmC47VSg==, figureFileBig=xy9YNvjWxI1mzwNM5c3gLw==, tableContent=null), ArticleFig(id=1241327679010557975, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241321696318247922, language=CN, label=图10, caption=
1-2/3X-(1-X)2/3与t的拟合曲线, figureFileSmall=yIFmFbC5T6uRfFhmC47VSg==, figureFileBig=xy9YNvjWxI1mzwNM5c3gLw==, tableContent=null), ArticleFig(id=1241327679157358629, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241321696318247922, language=EN, label=Fig.11, caption=
Linear fitting result of -lnK and 1/T, figureFileSmall=aCuQwd7U9pGZuvDStuRVow==, figureFileBig=MXSeWmHyStQpY3q/bRDSSg==, tableContent=null), ArticleFig(id=1241327679258021936, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241321696318247922, language=CN, label=图11, caption=
-lnK与1/T线性拟合结果, figureFileSmall=aCuQwd7U9pGZuvDStuRVow==, figureFileBig=MXSeWmHyStQpY3q/bRDSSg==, tableContent=null), ArticleFig(id=1241327679417405503, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241321696318247922, language=EN, label=Table 1, caption=
Analysis results of chemical composition of raw ore
, figureFileSmall=null, figureFileBig=null, tableContent=
| Be | F | Li | Nb | Cu | Pb | Zn |
| 0.102 | 1.01 | 0.001 | 0.003 | 0.004 2 | 0.018 | 0.013 |
| SiO2 | Al2O3 | CaO | MgO | K2O | Na2O | TFe |
| 42.12 | 23.10 | 2.47 | 3.15 | 3.18 | 3.12 | 2.30 |
), ArticleFig(id=1241327679518068812, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241321696318247922, language=CN, label=表1, caption=
原矿化学成分分析结果(质量分数)
, figureFileSmall=null, figureFileBig=null, tableContent=
| Be | F | Li | Nb | Cu | Pb | Zn |
| 0.102 | 1.01 | 0.001 | 0.003 | 0.004 2 | 0.018 | 0.013 |
| SiO2 | Al2O3 | CaO | MgO | K2O | Na2O | TFe |
| 42.12 | 23.10 | 2.47 | 3.15 | 3.18 | 3.12 | 2.30 |
), ArticleFig(id=1241327679627120732, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241321696318247922, language=EN, label=Table 2, caption=
Factor,levels and codes in experiment
, figureFileSmall=null, figureFileBig=null, tableContent=
| 编码 | 水平 |
|---|
| -1 | 0 | 1 |
|---|
| X1 | 2∶1 | 3∶1 | 4∶1 |
| X2 | 3 | 4 | 5 |
| X3 | 70 | 80 | 90 |
), ArticleFig(id=1241327679757144169, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241321696318247922, language=CN, label=表2, caption=
实验因素水平及编码
, figureFileSmall=null, figureFileBig=null, tableContent=
| 编码 | 水平 |
|---|
| -1 | 0 | 1 |
|---|
| X1 | 2∶1 | 3∶1 | 4∶1 |
| X2 | 3 | 4 | 5 |
| X3 | 70 | 80 | 90 |
), ArticleFig(id=1241327679882973304, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241321696318247922, language=EN, label=Table 3, caption=
Experimental results
, figureFileSmall=null, figureFileBig=null, tableContent=
| 实验号 | 因素水平 | 铍浸出率/% |
|---|
| X1 | X2 | X3 |
|---|
| 1 | 0 | 0 | 0 | 82.17 |
| 2 | -1 | 1 | 0 | 79.81 |
| 3 | 0 | 0 | 0 | 82.18 |
| 4 | 0 | 1 | -1 | 78.29 |
| 5 | 0 | -1 | 1 | 75.28 |
| 6 | 0 | -1 | -1 | 75.26 |
| 7 | 0 | 0 | 0 | 82.13 |
| 8 | 1 | 0 | 1 | 84.87 |
| 9 | -1 | 0 | 1 | 83.26 |
| 10 | 1 | 1 | 0 | 85.67 |
| 11 | -1 | -1 | 0 | 77.25 |
| 12 | 1 | 0 | -1 | 83.26 |
| 13 | 1 | -1 | 0 | 78.52 |
| 14 | 0 | 0 | 0 | 82.07 |
| 15 | 0 | 0 | 0 | 82.02 |
| 16 | -1 | 0 | -1 | 78.16 |
| 17 | 0 | 1 | 1 | 85.19 |
), ArticleFig(id=1241327679996219526, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241321696318247922, language=CN, label=表3, caption=
实验结果
, figureFileSmall=null, figureFileBig=null, tableContent=
| 实验号 | 因素水平 | 铍浸出率/% |
|---|
| X1 | X2 | X3 |
|---|
| 1 | 0 | 0 | 0 | 82.17 |
| 2 | -1 | 1 | 0 | 79.81 |
| 3 | 0 | 0 | 0 | 82.18 |
| 4 | 0 | 1 | -1 | 78.29 |
| 5 | 0 | -1 | 1 | 75.28 |
| 6 | 0 | -1 | -1 | 75.26 |
| 7 | 0 | 0 | 0 | 82.13 |
| 8 | 1 | 0 | 1 | 84.87 |
| 9 | -1 | 0 | 1 | 83.26 |
| 10 | 1 | 1 | 0 | 85.67 |
| 11 | -1 | -1 | 0 | 77.25 |
| 12 | 1 | 0 | -1 | 83.26 |
| 13 | 1 | -1 | 0 | 78.52 |
| 14 | 0 | 0 | 0 | 82.07 |
| 15 | 0 | 0 | 0 | 82.02 |
| 16 | -1 | 0 | -1 | 78.16 |
| 17 | 0 | 1 | 1 | 85.19 |
), ArticleFig(id=1241327680130437270, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241321696318247922, language=EN, label=Table 4, caption=
Variance analysis results of regression model
, figureFileSmall=null, figureFileBig=null, tableContent=
| 方差来源 | 平方和 | 自由度 | 均方差 | F值 | P值 |
|---|
| 模型 | 171.98 | 9 | 19.11 | 99.07 | <0.000 1 |
| 残差 | 1.35 | 7 | 0.19 | | |
| 失拟性 | 1.33 | 3 | 0.44 | 95.87 | 0.000 4 |
| 纯误差 | 0.019 | 4 | 0.004 63 | | |
| 总差 | 173.33 | 16 | | | |
| 决定系数 | 0.992 2 | | | | |
| 调整决定系数 | 0.982 2 | | | | |
), ArticleFig(id=1241327680252072104, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241321696318247922, language=CN, label=表4, caption=
回归模型方差分析结果
, figureFileSmall=null, figureFileBig=null, tableContent=
| 方差来源 | 平方和 | 自由度 | 均方差 | F值 | P值 |
|---|
| 模型 | 171.98 | 9 | 19.11 | 99.07 | <0.000 1 |
| 残差 | 1.35 | 7 | 0.19 | | |
| 失拟性 | 1.33 | 3 | 0.44 | 95.87 | 0.000 4 |
| 纯误差 | 0.019 | 4 | 0.004 63 | | |
| 总差 | 173.33 | 16 | | | |
| 决定系数 | 0.992 2 | | | | |
| 调整决定系数 | 0.982 2 | | | | |
), ArticleFig(id=1241327680390484152, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241321696318247922, language=EN, label=Table 5, caption=
Test results of significance of coefficient for regression equation
, figureFileSmall=null, figureFileBig=null, tableContent=
| 方差来源 | 平方和 | 自由度 | 均方差 | F值 | P值 |
|---|
| X1 | 23.94 | 1 | 23.94 | 124.13 | <0.000 1 |
| X2 | 64.13 | 1 | 64.13 | 332.47 | <0.000 1 |
| X3 | 23.22 | 1 | 23.22 | 120.39 | <0.000 1 |
| X1X2 | 5.27 | 1 | 5.27 | 27.31 | 0.001 2 |
| X1X3 | 3.05 | 1 | 3.05 | 15.79 | 0.005 4 |
| X2X3 | 11.83 | 1 | 11.83 | 61.35 | 0.000 1 |
| X12 | 4.56 | 1 | 4.56 | 23.63 | 0.001 8 |
| X22 | 34.01 | 1 | 34.01 | 176.31 | <0.000 1 |
| X32 | 2.48 | 1 | 2.48 | 12.84 | 0.008 9 |
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回归方程系数显著性检验结果
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| 方差来源 | 平方和 | 自由度 | 均方差 | F值 | P值 |
|---|
| X1 | 23.94 | 1 | 23.94 | 124.13 | <0.000 1 |
| X2 | 64.13 | 1 | 64.13 | 332.47 | <0.000 1 |
| X3 | 23.22 | 1 | 23.22 | 120.39 | <0.000 1 |
| X1X2 | 5.27 | 1 | 5.27 | 27.31 | 0.001 2 |
| X1X3 | 3.05 | 1 | 3.05 | 15.79 | 0.005 4 |
| X2X3 | 11.83 | 1 | 11.83 | 61.35 | 0.000 1 |
| X12 | 4.56 | 1 | 4.56 | 23.63 | 0.001 8 |
| X22 | 34.01 | 1 | 34.01 | 176.31 | <0.000 1 |
| X32 | 2.48 | 1 | 2.48 | 12.84 | 0.008 9 |
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Analysis of EDS chemical composition of leaching residue
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| 位点 | Be | O | Si | Ca | S |
|---|
| a | 0.02 | 45.12 | 43.93 | 8.56 | 2.37 |
| b | 0.01 | 43.21 | 45.80 | 9.13 | 1.85 |
| c | 0.02 | 46.89 | 40.15 | 10.27 | 2.67 |
), ArticleFig(id=1241327682093371613, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241321696318247922, language=CN, label=表6, caption=
浸出渣EDS化学成分分析结果(质量分数)
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| 位点 | Be | O | Si | Ca | S |
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| a | 0.02 | 45.12 | 43.93 | 8.56 | 2.37 |
| b | 0.01 | 43.21 | 45.80 | 9.13 | 1.85 |
| c | 0.02 | 46.89 | 40.15 | 10.27 | 2.67 |
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