Experimental study and application of pre-demagnetization for desulfurization and quality improvement of high-sulfur magnetite ore
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摘要: 针对都龙矿区的高硫磁铁矿，采用MLA等手段对其进行了分析，结果表明：高硫磁铁矿所含有价元素主要为铁、硫和锡，铁主要以磁铁矿形式存在，硫化物主要存在于磁黄铁矿和黄铁矿中，锡以锡石形式存在。脉石矿物主要为滑石、铁滑石和黑云母等。基于矿石性质研究，拟定了“预脱磁+浮选脱硫+弱磁选”选别工艺，闭路试验结果表明：采用预脱磁处理、磨矿细度−0.074 mm 89%、活化剂AS-106
3500 g/t、捕收剂B30-2 150 g/t、弱磁选磁场强度0.1 T的条件下，可获得硫品位为23.49%、铁品位60.16%、硫回收率97.70%的高铁硫精矿；含硫0.43%、铁品位和回收率分别为66.79%和57.08%的优质铁精矿。Abstract: In this paper component analysis was conducted on the high-sulfur magnetite ore from the Dulong mining area, by means of MLA. Analysis results indicate that the valuable elements in the high-sulfur magnetite ore are mainly iron, sulfur, and tin. Iron mainly exists in the form of magnetite, while sulfides are primarily present in pyrite and pyrrhotite, and tin exists in the form of cassiterite. The gangue minerals mainly consist of talc, iron talc, and biotite. Based on the analysis on the ore components, a separation process of 'pre-demagnetization, flotation desulfurization, and weak magnetic separation had been proposed. Closed circuit separation test results indicated that under the conditions of pre-demagnetization treatment, grinding fineness of -0.074 mm at 89%, activator AS-106 at3500 g/t, collector B30-2 at 150 g/t, and weak magnetic separation field strength of 0.1 T, a high iron sulfur concentrate with a sulfur grade of 23.94%, iron grade of 60.16%, and sulfur recovery rate of 97.70% could be obtained. Besides, a high-quality iron concentrate with sulfur content of 0.43%, iron grade of 66.79%, and recovery rate of 57.08% was also achieved. -
图 5 弱磁精矿预先分级-再磨-脱磁-反浮选脱硫工艺流程
Figure 5. Flowsheet of pre-classification-regrinding-demagnetizing-reverse flotation desulphurization process
图 6 磨矿细度对硫铁分离的影响
Figure 6. Effects of grinding fineness on the separation of sulphur and iron
图 7 活化剂种类对硫铁分离的影响
1-对甲苯肿酸；2-碳酸氢钠；3-草酸；4-柠檬酸；5-n(草酸)：n(柠檬酸)=3:1；6-有机酸(AS-106）
Figure 7. Effects of activator types on the separation of sulphur and iron
图 8 AS-106用量对硫铁分离的影响
Figure 8. Effects of AS-106 dosages on the separation of sulphur and iron
图 9 捕收剂种类对硫铁分离的影响
1-乙基黄药；2-相基黄药；3-戊基黄药；4-DF-306；5-B30-2
Figure 9. Effects of collector types on the separation of sulphur and iron
图 10 B30-2用量对硫铁分离的影响
Figure 10. Effects of B30-2 dosages on the separation of sulphur and iron
图 11 弱磁精矿预先分级-再磨-脱磁-反浮选脱硫闭路工艺流程
Figure 11. Flowsheet of preclassification-regrinding-demagnetizing-the closed-circuit reverse flotation desulphurization process
表 1 试样化学成分分析结果
Table 1. Multi-element analysis results of sample
% Fe S Si Ca Mg Al K F Mn Zn Sn Cu As 56.66 10.67 1.23 0.45 0.72 0.25 0.19 0.13 0.07 0.16 0.18 0.02 0.06 
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表 2 试样铁物相分析结果
Table 2. Analysis results of iron phase of sample
% Phases Magnetite Limestone
and other
carbonatesSilicate Pyrite and
other sulfide
mineralsHematite
and othersTotal
ironContents 3.17 0.52 3.82 9 0.56 17.07 Distribution
rates18.55 3.06 22.4 52.7 3.29 100
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表 3 试样矿物组成及相对含量
Table 3. Mineral compositions and relative content of individual compositions
% Minerals Relative content Minerals Relative content Minerals Relative content Magnetite 61.79 Minnesotaite 0.87 Epidote 0.11 Magmatic pyrite 28.79 Muscovite 0.02 Sphene 0.02 Pyrite 1.03 Phlogopite 0.25 Zircon Rare Marmatite 0.75 Biotite 1.36 Calcite 0.14 Arsenopyrite 0.14 Chlorite 0.5 Dolomite 0.8 Chalcopyrite 0.17 Tremolite 0.84 Fluorite 0.19 Galena Rare Serpentine 0.14 Rhodochrosite 0.1 Cassiterite 0.23 Actinolite 0.15 Ilvaite 0.17 Quartz 0.22 Potash feldspar 0.03 Rutile 0.04 Talc 0.96 Diopside 0.21 Apatite 0.01
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表 4 主要矿物的粒度特征分布表
Table 4. Particle size distribution of main minerals
Particle size/mm Magnetite/% Magmatic pyrite/% Pyrite/% Content Accumulation Content Accumulation Content Accumulation 0.074 0.59 0.59 1.08 1.08 −0.037 15.92 16.51 18.93 20.01 33.71 33.71 −0.019 39.63 56.14 38.52 58.52 43.49 76.2 −0.009 30.45 86.59 30.72 89.24 19.39 95.58 −0.004 12.87 99.46 10.34 99.58 4.37 99.95 −0.005 0.54 100 0.41 100 0.05 100
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表 5 高硫磁铁矿主要矿物解离度分析结果
Table 5. Analysis results of the liberation degree of high-sulfur magnetite
% Liberation degree
(hereafter referred to as L.D.)Magnetite Magmatic pyrite Pyrite Interval L.D. Accumulative L.D. Interval L.D. Accumulative L.D. Interval L.D. Accumulative L.D. 100.00 67.34 67.34 63.34 63.34 65.34 65.34 75%< x < 100.00 12.09 79.43 13.09 76.43 10.09 75.43 50 < x ≤ 75 3.54 82.97 5.54 81.97 4.54 79.97 25 < x ≤ 50 4.23 87.2 7.23 89.2 7.23 87.2 0 ≤ x ≤ 25 12.8 100 10.8 100 12.8 100
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表 6 高硫磁铁矿预先脱磁-弱磁选试验结果
Table 6. Results of pre-demagnetization and weak magnetic separation tests on high-sulfur magnetite
% Groups Products Yields Grade Recovery Sn Fe S Sn Fe S ①Undemagnetizing Concentrate 89.16 0.11 61.36 11.61 73.10 96.59 95.96 Tailing 10.84 0.34 17.82 4.02 26.90 3.41 4.04 Feed 100.00 0.14 56.64 10.79 100.00 100.00 100.00 ②Demagnetizing Concentrate 88.90 0.11 62.11 10.89 70.55 97.41 90.24 Tailing 11.10 0.35 13.23 9.43 29.45 2.59 9.76 Feed 100.00 0.13 56.68 10.73 100.00 100.00 100.00 Difference（②-①） Concentrate −0.26 0 0.75 −0.72 −2.55 0.82 −5.72 Tailing 0.26 0.01 −4.59 5.41 2.55 −0.82 5.72
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表 7 闭路试验结果
Table 7. Results of the closed-circuit test
% Products Yields Grade Recovery Fe S Sn Fe S Sn Sulphur concentrate 43.01 60.16 23.49 0.12 42.64 97.7 33.2 Iron concentrate 55.76 66.79 0.43 0.19 57.08 2.24 63.89 Tailings 1.23 14.45 0.53 0.39 0.28 0.06 2.91 Feed 100.00 61.61 10.50 0.16 100.00 100.00 100.00
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表 8 闭路试验尾矿水分析结果
Table 8. Analysis results of tailings water from closed-circuit tests
Water sample content/（mg·L−1） pH As Pb Cr Ammonia COD F Total P Wastewater discharge permit emission control standards 0.1 0.2 1.5 8 60 5 1 6～9 Sulfurous iron concentrate water 0.008 0.0003 0.0134 7.790 54.22 3.89 0.459 7.34 Iron concentrate water 0.007 0.0004 0.0189 6.234 45.45 3.47 0.378 8.99
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[1] SUO X. Investigation on main ore types and processing and smelting technology of iron ore found in China[J]. Huabei land and Resources, 2018(2): 17-19. (索希. 我国已发现铁矿主要矿石类型及加工选冶工艺调查[J]. 华北国土资源, 2018(2): 17-19. doi: 10.3969/j.issn.1672-7487.2018.02.011SUO X. Investigation on main ore types and processing and smelting technology of iron ore found in China[J]. Huabei land and Resources, 2018（2）: 17-19. doi: 10.3969/j.issn.1672-7487.2018.02.011 [2] JIANG X W. Development status and prospect analysis of iron ore industry in China[J]. China Metal Bulletin, 2017(7): 162-163. (姜雪薇. 中国铁矿行业发展现状及前景分析[J]. 中国金属通报, 2017(7): 162-163.JIANG X W. Development status and prospect analysis of iron ore industry in China[J]. China Metal Bulletin, 2017（7）: 162-163. [3] LIU X H, LI S F, YUAN Z T, et al. Flotation desulfurization of iron concentrate in Chaoyang Xinhua molybdenum Mine[J]. Non-ferrous metals, 2011, 27(4): 23-26. (刘兴华, 李淑菲, 袁致涛, 等. 朝阳新华钼矿铁精矿脱硫试验研究[J]. 有色矿冶, 2011, 27(4): 23-26. doi: 10.3969/j.issn.1007-967X.2011.04.007LIU X H, LI S F, YUAN Z T, et al. Flotation desulfurization of iron concentrate in Chaoyang Xinhua molybdenum Mine[J]. Non-ferrous metals, 2011, 27（4）: 23-26. doi: 10.3969/j.issn.1007-967X.2011.04.007 [4] WANG L M, BAI C X, SUI Y T, et al. Experimental study on desulphurization of iron concentrate from a concentrator in inner mongolia[J]. Modern mining, 2023, 39(3): 122-125. (王丽明, 白春霞, 睢月婷, 等. 内蒙古某选厂铁精矿脱硫试验研究[J]. 现代矿业, 2023, 39(3): 122-125. doi: 10.3969/j.issn.1674-6082.2023.03.029WANG L M, BAI C X, SUI Y T, et al. Experimental study on desulphurization of iron concentrate from a concentrator in inner mongolia[J]. Modern mining, 2023, 39（3）: 122-125. doi: 10.3969/j.issn.1674-6082.2023.03.029 [5] LI B Q, XIE X, JU C C, et al. Experimental research on desulfurization of iron concentrate in a concentrator of Jilin[J]. Nonferrous metal works, 2021, 11(4): 88-95. (李博琦, 谢贤, 纪翠翠, 等. 吉林某选厂铁精矿脱硫试验研究[J]. 有色金属工程, 2021, 11(4): 88-95.LI B Q, XIE X, JU C C, et al. Experimental research on desulfurization of iron concentrate in a concentrator of Jilin[J]. Nonferrous metal works, 2021, 11(4): 88-95. [6] LIU G K, ZHENG Y X, YANG C J, et al. Stage grinding-magnetic separation-flotation combined beneficiation processing technology for a complex refractory iron ore[J]. Mining and metallurgy, 2024, 33(4): 525-533. (刘国凯, 郑永兴, 杨春杰, 等. 复杂难选铁矿阶段磨矿-磁选-浮选联合选矿工艺[J]. 矿冶, 2024, 33(4): 525-533.LIU G K, ZHENG Y X, YANG C J, et al. Stage grinding-magnetic separation-flotation combined beneficiation processing technology for a complex refractory iron ore[J]. Mining and metallurgy, 2024, 33（4）: 525-533. [7] WANG Y Z, HU Y M, ZHOU Y C. Experimental research on flotation desulfurization of a magnetic separation iron concentrate in shanxi[J]. Metal Mine, 2019, 48(7): 70-74. (王英姿, 胡义明, 周永诚. 山西某磁选铁精矿浮选脱硫试验[J]. 金属矿山, 2019, 48(7): 70-74. doi: 10.19614/j.cnki.jsks.201907012WANG Y Z, HU Y M, ZHOU Y C. Experimental research on flotation desulfurization of a magnetic separation iron concentrate in shanxi[J]. Metal Mine, 2019, 48（7）: 70-74. doi: 10.19614/j.cnki.jsks.201907012 [8] HAN B Q, ZHANG S Y. Technical study on desulfurization process of a sulfur-rich magnetite ore[J]. Modern Mining, 2010, 26(8): 123-124. (常宝乾, 张世银. 某富硫磁铁矿脱硫工艺技术研究[J]. 现代矿业, 2010, 26(8): 123-124.HAN B Q, ZHANG S Y. Technical study on desulfurization process of a sulfur-rich magnetite ore[J]. Modern Mining, 2010, 26（8）: 123-124. [9] LIU G R, LIU W F, LIU C S. Quality improvement and impurity reduction technology of a magnetite[J]. Mining and Metallurgy, 2018, 27(6): 10-16. (刘国蓉, 刘万峰, 刘承帅. 某磁铁矿提质降杂技术[J]. 矿冶, 2018, 27(6): 10-16. doi: 10.3969/j.issn.1005-7854.2018.06.003LIU G R, LIU W F, LIU C S. Quality improvement and impurity reduction technology of a magnetite[J]. Mining and Metallurgy, 2018, 27（6）: 10-16. doi: 10.3969/j.issn.1005-7854.2018.06.003 [10] ZHANG S A, WANG X B, WANG Y S. Impurity reduction and quality upgrading for iron concentrate from mines of Jiusteel[J]. Mining and Metallurgical Engineering, 2016, 36(6): 53-56. (张双爱, 王晓斌, 王友胜. 某低品位铁精矿提质降杂试验研究[J]. 矿冶工程, 2016, 36(6): 53-56.ZHANG S A, WANG X B, WANG Y S. Impurity reduction and quality upgrading for iron concentrate from mines of Jiusteel[J]. Mining and Metallurgical Engineering, 2016, 36（6）: 53-56. [11] JIA W, WANG Z Q, YAO D L, et al. study on process mineralogy of a high sulfur iron ore in Anhui province[J]. Metal Mine, 2020(12): 130-135. (郏威, 王忠强, 姚灯磊, 等. 安徽某高硫铁矿石工艺矿物学研究[J]. 金属矿山, 2020(12): 130-135. doi: 10.19614/j.cnki.jsks.202012021JIA W, WANG Z Q, YAO D L, et al. study on process mineralogy of a high sulfur iron ore in Anhui province[J]. Metal Mine, 2020（12）: 130-135. doi: 10.19614/j.cnki.jsks.202012021 [12] FU H T, TONG X, XIE X, et al. Research status of reverse flotation desulphurization of high sulfur magnet concentrate[J]. China Metal Bulletin, 2023(9): 7-9. (符海桃, 童雄, 谢贤, 等. 高硫磁铁精矿反浮选脱硫工艺研究现状[J]. 中国金属通报, 2023(9): 7-9. doi: 10.3969/j.issn.1672-1667.2023.09.003FU H T, TONG X, XIE X, et al. Research status of reverse flotation desulphurization of high sulfur magnet concentrate[J]. China Metal Bulletin, 2023（9）: 7-9. doi: 10.3969/j.issn.1672-1667.2023.09.003 [13] ZHANG C, LI J, LI B W, et al. Effect of collector on flotation desulphurization of iron concentrate[J]. Multipurpose Utilization of Mineral Resources, 2019(1): 44-47. (张超, 李解, 李保卫, 等. 捕收剂对铁精矿浮选脱硫的影响[J]. 矿产综合利用, 2019(1): 44-47. doi: 10.3969/j.issn.1000-6532.2019.01.009ZHANG C, LI J, LI B W, et al. Effect of collector on flotation desulphurization of iron concentrate[J]. Multipurpose Utilization of Mineral Resources, 2019（1）: 44-47. doi: 10.3969/j.issn.1000-6532.2019.01.009 [14] ZHAO L, GE Y Y, YU J, et al. Flotation for desulfurization of iron concentrate from magnetic separation operation of a concentrator in inner mongolia[J]. Mining and metallurgical engineering, 2018, 38(2): 58-60. (赵璐, 葛英勇, 余俊, 等. 内蒙古某磁选铁精矿浮选脱硫试验研究[J]. 矿冶工程, 2018, 38(2): 58-60.ZHAO L, GE Y Y, YU J, et al. Flotation for desulfurization of iron concentrate from magnetic separation operation of a concentrator in inner mongolia[J]. Mining and metallurgical engineering, 2018, 38（2）: 58-60. [15] LIAO J P, HUANG Z L, CUI J, et al. Desulfurization experiment of a high iron concentrate by magnetic separation-demagnetization-composite activation reverse flotation[J]. Protection and Utilization of Mineral Resources, 2019, 39(4): 125-130. (廖军平, 黄自力, 崔军, 等. 某高硫磁铁精矿磁选-脱磁-复合活化反浮选脱硫试验[J]. 矿产保护与利用, 2019, 39(4): 125-130. doi: 10.13779/j.cnki.issn1001-0076.2019.02.031LIAO J P, HUANG Z L, CUI J, et al. Desulfurization experiment of a high iron concentrate by magnetic separation-demagnetization-composite activation reverse flotation[J]. Protection and Utilization of Mineral Resources, 2019, 39（4）: 125-130. doi: 10.13779/j.cnki.issn1001-0076.2019.02.031 [16] RAO F, TONG X, HUANG Y L, et al. Research and practice on removing sulfur from iron ore[J]. Yunnan metallurgy, 2007, 36(5): 13-16, 28. (饶峰, 童雄, 黄宇林, 等. 云南文山某铁精矿脱硫的试验研究[J]. 云南冶金, 2007, 36(5): 13-16, 28. doi: 10.3969/j.issn.1006-0308.2007.05.004RAO F, TONG X, HUANG Y L, et al. Research and practice on removing sulfur from iron ore[J]. Yunnan metallurgy, 2007, 36（5）: 13-16, 28. doi: 10.3969/j.issn.1006-0308.2007.05.004 -
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