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An experimental study on a metallurgical grade fluorite concentrate with CaF2 content of 70.34% was conducted to upgrade fluorite concentrate quality by reducing impurities therein. The results of the full process test show that by adopting a process of high intensity magnetic separation for reducing silicon, followed by flotation of non-magnetic minerals for reducing calcium, the experiment produces a fluorite concentrate grading of 91.95% CaF2 at 76.52% recovery, with a yield of 58.30%. It is shown that the concentrate meets the raw material standards for anhydrous hydrofluoric acid production.
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针对某CaF2品位70.34%的冶金级萤石精矿进行了提质降杂试验研究。结果表明,采用“强磁选降硅-非磁性产品浮选降钙”工艺,实验室全流程试验获得了精矿产率58.30%、CaF2品位91.95%、回收率76.52%的萤石产品,萤石产品质量达到了制备无水氢氟酸的原料要求。
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冯青舒(1989—),男,江西抚州人,工程师,主要研究方向为伴生萤石资源选矿回收与利用。E-mail:461506604@qq.com
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冯青舒(1989—),男,江西抚州人,工程师,主要研究方向为伴生萤石资源选矿回收与利用。E-mail:461506604@qq.com
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| CaF2 | CaO | SiO2 | Al2O3 | Fe2O3 | MgO | K2O | Na2O |
|---|
| 70.34 | 12.44 | 5.82 | 1.04 | 0.82 | 0.32 | 0.28 | 0.11 |
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试样化学多元素分析结果(质量分数)
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| CaF2 | CaO | SiO2 | Al2O3 | Fe2O3 | MgO | K2O | Na2O |
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| 70.34 | 12.44 | 5.82 | 1.04 | 0.82 | 0.32 | 0.28 | 0.11 |
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| 萤石 | 方解石 | 钙铁榴石 | 钙铝榴石 | 钙铁辉石 | 石英 |
| 70.34 | 20.38 | 1.35 | 1.68 | 0.55 | 0.62 |
| 白云母 | 黑云母 | 铁铝榴石 | 绿泥石 | 磷灰石 | 硅灰石 |
| 1.14 | 0.42 | 0.51 | 0.27 | 0.21 | 0.15 |
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试样矿物组成及含量(质量分数)
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| 萤石 | 方解石 | 钙铁榴石 | 钙铝榴石 | 钙铁辉石 | 石英 |
| 70.34 | 20.38 | 1.35 | 1.68 | 0.55 | 0.62 |
| 白云母 | 黑云母 | 铁铝榴石 | 绿泥石 | 磷灰石 | 硅灰石 |
| 1.14 | 0.42 | 0.51 | 0.27 | 0.21 | 0.15 |
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| 单体分布率/% | 连生体分布率/% |
|---|
| >3/4 | 3/4~1/2 | 1/2~1/4 | <1/4 |
|---|
| 90.11 | 5.55 | 2.74 | 1.27 | 0.33 |
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试样解离度测定结果
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| 单体分布率/% | 连生体分布率/% |
|---|
| >3/4 | 3/4~1/2 | 1/2~1/4 | <1/4 |
|---|
| 90.11 | 5.55 | 2.74 | 1.27 | 0.33 |
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| 磁选设备 | 产品名称 | 产率/% | 品位/% | 回收率/% |
|---|
| CaF2 | CaCO3 | SiO2 | CaF2 | CaCO3 | SiO2 |
|---|
| SLon-500 | 磁性产品 | 18.21 | 58.91 | 20.34 | 10.38 | 15.25 | 17.73 | 43.14 |
| 非磁性产品 | 81.79 | 72.89 | 21.02 | 3.05 | 84.75 | 82.27 | 56.86 |
| 给矿 | 100.00 | 70.34 | 20.90 | 4.38 | 100.00 | 100.00 | 100.00 |
| ZH-560 | 磁性产品 | 19.58 | 63.57 | 18.52 | 8.96 | 17.71 | 17.39 | 39.56 |
| 非磁性产品 | 80.42 | 71.92 | 21.42 | 3.33 | 82.29 | 82.61 | 60.44 |
| 给矿 | 100.00 | 70.29 | 20.85 | 4.43 | 100.00 | 100.00 | 100.00 |
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强磁选设备对比试验结果
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| 磁选设备 | 产品名称 | 产率/% | 品位/% | 回收率/% |
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| CaF2 | CaCO3 | SiO2 | CaF2 | CaCO3 | SiO2 |
|---|
| SLon-500 | 磁性产品 | 18.21 | 58.91 | 20.34 | 10.38 | 15.25 | 17.73 | 43.14 |
| 非磁性产品 | 81.79 | 72.89 | 21.02 | 3.05 | 84.75 | 82.27 | 56.86 |
| 给矿 | 100.00 | 70.34 | 20.90 | 4.38 | 100.00 | 100.00 | 100.00 |
| ZH-560 | 磁性产品 | 19.58 | 63.57 | 18.52 | 8.96 | 17.71 | 17.39 | 39.56 |
| 非磁性产品 | 80.42 | 71.92 | 21.42 | 3.33 | 82.29 | 82.61 | 60.44 |
| 给矿 | 100.00 | 70.29 | 20.85 | 4.43 | 100.00 | 100.00 | 100.00 |
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| 磁场强度/T | 产品名称 | 产率/% | 品位/% | 回收率/% |
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| CaF2 | CaCO3 | SiO2 | CaF2 | CaCO3 | SiO2 |
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| 0.4 | 磁性产品 | 14.84 | 57.62 | 22.38 | 10.00 | 12.15 | 16.08 | 33.21 |
| 非磁性产品 | 85.16 | 72.63 | 20.36 | 3.51 | 87.85 | 83.92 | 66.79 |
| 给矿 | 100.00 | 70.40 | 20.66 | 4.47 | 100.00 | 100.00 | 100.00 |
| 0.7 | 磁性产品 | 16.51 | 59.33 | 20.48 | 10.10 | 13.93 | 16.16 | 38.12 |
| 非磁性产品 | 83.49 | 72.51 | 21.01 | 3.24 | 86.07 | 83.84 | 61.88 |
| 给矿 | 100.00 | 70.33 | 20.92 | 4.37 | 100.00 | 100.00 | 100.00 |
| 1.0 | 磁性产品 | 17.12 | 59.13 | 20.37 | 10.25 | 14.38 | 16.92 | 39.12 |
| 非磁性产品 | 82.88 | 72.75 | 20.66 | 3.30 | 85.62 | 83.08 | 60.88 |
| 给矿 | 100.00 | 70.42 | 20.61 | 4.49 | 100.00 | 100.00 | 100.00 |
| 1.3 | 磁性产品 | 18.21 | 58.91 | 20.34 | 10.38 | 15.25 | 17.73 | 43.14 |
| 非磁性产品 | 81.79 | 72.89 | 21.02 | 3.05 | 84.75 | 82.27 | 56.86 |
| 给矿 | 100.00 | 70.34 | 20.90 | 4.38 | 100.00 | 100.00 | 100.00 |
| 1.5 | 磁性产品 | 18.68 | 59.84 | 20.05 | 10.06 | 15.86 | 17.88 | 43.91 |
| 非磁性产品 | 81.32 | 72.95 | 21.15 | 2.95 | 84.14 | 82.12 | 56.09 |
| 给矿 | 100.00 | 70.50 | 20.94 | 4.28 | 100.00 | 100.00 | 100.00 |
), ArticleFig(id=1240651356084695901, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1240631740314734705, language=CN, label=表5, caption=
磁场强度试验结果
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| 磁场强度/T | 产品名称 | 产率/% | 品位/% | 回收率/% |
|---|
| CaF2 | CaCO3 | SiO2 | CaF2 | CaCO3 | SiO2 |
|---|
| 0.4 | 磁性产品 | 14.84 | 57.62 | 22.38 | 10.00 | 12.15 | 16.08 | 33.21 |
| 非磁性产品 | 85.16 | 72.63 | 20.36 | 3.51 | 87.85 | 83.92 | 66.79 |
| 给矿 | 100.00 | 70.40 | 20.66 | 4.47 | 100.00 | 100.00 | 100.00 |
| 0.7 | 磁性产品 | 16.51 | 59.33 | 20.48 | 10.10 | 13.93 | 16.16 | 38.12 |
| 非磁性产品 | 83.49 | 72.51 | 21.01 | 3.24 | 86.07 | 83.84 | 61.88 |
| 给矿 | 100.00 | 70.33 | 20.92 | 4.37 | 100.00 | 100.00 | 100.00 |
| 1.0 | 磁性产品 | 17.12 | 59.13 | 20.37 | 10.25 | 14.38 | 16.92 | 39.12 |
| 非磁性产品 | 82.88 | 72.75 | 20.66 | 3.30 | 85.62 | 83.08 | 60.88 |
| 给矿 | 100.00 | 70.42 | 20.61 | 4.49 | 100.00 | 100.00 | 100.00 |
| 1.3 | 磁性产品 | 18.21 | 58.91 | 20.34 | 10.38 | 15.25 | 17.73 | 43.14 |
| 非磁性产品 | 81.79 | 72.89 | 21.02 | 3.05 | 84.75 | 82.27 | 56.86 |
| 给矿 | 100.00 | 70.34 | 20.90 | 4.38 | 100.00 | 100.00 | 100.00 |
| 1.5 | 磁性产品 | 18.68 | 59.84 | 20.05 | 10.06 | 15.86 | 17.88 | 43.91 |
| 非磁性产品 | 81.32 | 72.95 | 21.15 | 2.95 | 84.14 | 82.12 | 56.09 |
| 给矿 | 100.00 | 70.50 | 20.94 | 4.28 | 100.00 | 100.00 | 100.00 |
), ArticleFig(id=1240651356286022517, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1240631740314734705, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| SY-2用量/(g·t-1) | 产品名称 | 作业产率/% | 品位/% | 作业回收率/% |
|---|
| CaF2 | CaCO3 | CaF2 | CaCO3 |
|---|
| 150 | 粗精矿 | 89.43 | 78.63 | 17.73 | 97.06 | 75.33 |
| 尾矿 | 10.57 | 20.17 | 49.12 | 2.94 | 24.67 |
| 非磁性产品 | 100.00 | 72.45 | 21.05 | 100.00 | 100.00 |
| 200 | 粗精矿 | 88.24 | 78.96 | 17.02 | 96.59 | 71.12 |
| 尾矿 | 11.76 | 20.91 | 51.85 | 3.41 | 28.88 |
| 非磁性产品 | 100.00 | 72.13 | 21.12 | 100.00 | 100.00 |
| 300 | 粗精矿 | 87.05 | 79.42 | 16.91 | 95.98 | 68.69 |
| 尾矿 | 12.95 | 22.37 | 51.82 | 4.02 | 31.31 |
| 非磁性产品 | 100.00 | 72.03 | 21.43 | 100.00 | 100.00 |
), ArticleFig(id=1240651356457988998, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1240631740314734705, language=CN, label=表6, caption=
抑制剂SY-2用量试验结果
, figureFileSmall=null, figureFileBig=null, tableContent=
| SY-2用量/(g·t-1) | 产品名称 | 作业产率/% | 品位/% | 作业回收率/% |
|---|
| CaF2 | CaCO3 | CaF2 | CaCO3 |
|---|
| 150 | 粗精矿 | 89.43 | 78.63 | 17.73 | 97.06 | 75.33 |
| 尾矿 | 10.57 | 20.17 | 49.12 | 2.94 | 24.67 |
| 非磁性产品 | 100.00 | 72.45 | 21.05 | 100.00 | 100.00 |
| 200 | 粗精矿 | 88.24 | 78.96 | 17.02 | 96.59 | 71.12 |
| 尾矿 | 11.76 | 20.91 | 51.85 | 3.41 | 28.88 |
| 非磁性产品 | 100.00 | 72.13 | 21.12 | 100.00 | 100.00 |
| 300 | 粗精矿 | 87.05 | 79.42 | 16.91 | 95.98 | 68.69 |
| 尾矿 | 12.95 | 22.37 | 51.82 | 4.02 | 31.31 |
| 非磁性产品 | 100.00 | 72.03 | 21.43 | 100.00 | 100.00 |
), ArticleFig(id=1240651356608983960, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1240631740314734705, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| CY-21用量/(g·t-1) | 产品名称 | 作业产率/% | 品位/% | 作业回收率/% |
|---|
| CaF2 | CaCO3 | CaF2 | CaCO3 |
|---|
| 200 | 粗精矿 | 87.87 | 78.37 | 17.89 | 95.57 | 72.51 |
| 尾矿 | 12.13 | 26.34 | 49.12 | 4.43 | 27.49 |
| 非磁性产品 | 100.00 | 72.06 | 21.68 | 100.00 | 100.00 |
| 250 | 粗精矿 | 89.17 | 78.43 | 17.52 | 96.93 | 74.17 |
| 尾矿 | 10.83 | 20.47 | 50.22 | 3.07 | 25.83 |
| 非磁性产品 | 100.00 | 72.15 | 21.06 | 100.00 | 100.00 |
| 300 | 粗精矿 | 90.13 | 77.84 | 18.66 | 97.21 | 78.00 |
| 尾矿 | 9.87 | 20.42 | 48.07 | 2.79 | 22.00 |
| 非磁性产品 | 100.00 | 72.17 | 21.56 | 100.00 | 100.00 |
), ArticleFig(id=1240651356793533352, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1240631740314734705, language=CN, label=表7, caption=
捕收剂CY-21用量试验结果
, figureFileSmall=null, figureFileBig=null, tableContent=
| CY-21用量/(g·t-1) | 产品名称 | 作业产率/% | 品位/% | 作业回收率/% |
|---|
| CaF2 | CaCO3 | CaF2 | CaCO3 |
|---|
| 200 | 粗精矿 | 87.87 | 78.37 | 17.89 | 95.57 | 72.51 |
| 尾矿 | 12.13 | 26.34 | 49.12 | 4.43 | 27.49 |
| 非磁性产品 | 100.00 | 72.06 | 21.68 | 100.00 | 100.00 |
| 250 | 粗精矿 | 89.17 | 78.43 | 17.52 | 96.93 | 74.17 |
| 尾矿 | 10.83 | 20.47 | 50.22 | 3.07 | 25.83 |
| 非磁性产品 | 100.00 | 72.15 | 21.06 | 100.00 | 100.00 |
| 300 | 粗精矿 | 90.13 | 77.84 | 18.66 | 97.21 | 78.00 |
| 尾矿 | 9.87 | 20.42 | 48.07 | 2.79 | 22.00 |
| 非磁性产品 | 100.00 | 72.17 | 21.56 | 100.00 | 100.00 |
), ArticleFig(id=1240651356961305528, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1240631740314734705, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 产品名称 | 产率/% | 品位/% | 回收率/% |
|---|
| CaF2 | CaCO3 | SiO2 | CaF2 | CaCO3 | SiO2 |
|---|
| 萤石精矿 | 58.30 | 91.95 | 5.48 | 1.29 | 76.52 | 15.64 | 15.74 |
| 磁性产品 | 18.30 | 58.73 | 20.14 | 10.57 | 15.34 | 18.04 | 40.63 |
| 尾矿1 | 11.01 | 20.35 | 59.32 | 10.17 | 3.20 | 31.97 | 23.52 |
| 尾矿2 | 12.39 | 27.91 | 56.64 | 7.73 | 4.94 | 34.35 | 20.11 |
| 给矿 | 100.00 | 70.06 | 20.43 | 4.76 | 100.00 | 100.00 | 100.00 |
), ArticleFig(id=1240651357057774535, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1240631740314734705, language=CN, label=表8, caption=
全流程试验结果
, figureFileSmall=null, figureFileBig=null, tableContent=
| 产品名称 | 产率/% | 品位/% | 回收率/% |
|---|
| CaF2 | CaCO3 | SiO2 | CaF2 | CaCO3 | SiO2 |
|---|
| 萤石精矿 | 58.30 | 91.95 | 5.48 | 1.29 | 76.52 | 15.64 | 15.74 |
| 磁性产品 | 18.30 | 58.73 | 20.14 | 10.57 | 15.34 | 18.04 | 40.63 |
| 尾矿1 | 11.01 | 20.35 | 59.32 | 10.17 | 3.20 | 31.97 | 23.52 |
| 尾矿2 | 12.39 | 27.91 | 56.64 | 7.73 | 4.94 | 34.35 | 20.11 |
| 给矿 | 100.00 | 70.06 | 20.43 | 4.76 | 100.00 | 100.00 | 100.00 |
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