采矿外文翻译---从弱磁选尾矿中回收铁的工艺探讨.docx

英文翻译from the weak magnetic separation tailings in recycling process of iron1 beforebefore the 1990s, small iron mines in each half with weak magnetic separation recycling of strong magnetic iron content, relatively weak magnetic of hematite, hematite, limonite because by dont invest big or high production costs, the price of iron concentrate and relatively low and tailings dam exists in a heap. with the development of science and technology, comprehensive utilization of mineral resources and the environment protection, and the increase in the price of iron concentrate, with low cost recovery of weak magnetic hematite, hematite, brown iron has become possible. this study from guangdong yangchun ore mining of a half ferric oxide magnetic separation tailings, adopt more weak square case can better recovery are relatively weak magnetic iron content, iron recovery to 76% 93, iron concentrate grade56% 51%.2 sample propertiesthis specimen from tailings directly take less valuable, iron, 39% of sample analysis, screening and iron in the level of grain distribution see table 1. from table 1, 0 + 2mm grains relative low iron grade level 0-074mm grain, a higher level of iron products, 56, 26%. sample iron ore, mainly illusion chek limonite hematite, exists in the form of gangue minerals, mainly for quartz.table 1 sample of screening analysis and distribution of ironin total 100. in 2006, 100. 393 for the processdue to the sample iron minerals mainly illusion hematite, hematite, limonite form of existence, and the gangue minerals mainly for quartz, so useful mineral and gangue minerals existing differences exist in magnetic again, can use the proportion between, magnetic flux re-election, re-election + magnetic re-election to select scheme as separate iron and gangue minerals.4 for processes and results4.1 one chosen process researchthe use of magnetic flux study machine + strong magnetic separation machine (1) in the case of square, magnetic choose machine + belt of strong magnetic re-election machine (2), in the solution of magnetic separation machine + bed (3), spiral scheme of belt conveyor mineral machine + strong magnetic separator (4) heavy scheme of fourchoose dont plan to separate iron and gangue minerals, dont flowcheng (see figure 1-2, dont see table 2 5 results.4. 2 resultsfrom table 2 5 results indicated that the highest recovery plan 1 iron for 93. 56, 3 81. 37%, 2 and 4 in case party, dont be in close 76 percent and j76. 52 percent, iron concentrate grade scheme for 56. 4 highest 56%,fang fang and 2 in case of three phase for nearly five (5) : dont points, 4 5 % and55 percent), minimum for 51. plan 1 28%. 1 and 2 from the scheme and the scheme of the three schemes, strong comparative 2 concentrate separationthe weak magnetic minerals recovery efficiency of iron ore recovery, 70, 66%, followed by 41%, bed 58. for the poor with strong magnetic separator in 53. 87% of heavy, iron concentrate grade and belt in the bed near strong magnetic separator heavy, 5 (3) 5 5%3 4 5 and 5 %, strong magnetic chosen for the low machine48. 87. the main reason is strong magnetic separation machine put some iron and gangue minerals to choose the birth body of iron concentrate, so as to enhance the recovery of iron, reduced iron concentrate grade. with strong magnetic separator in weight of magnetic minerals, though, but the back to improve water cleaning, should concentrate grade,the increased flow, with some even slurry was born and granule iron into tailings, reduce the rate of recovery of iron. bed is a sorting accuracy of equipment, if things exist between the certain proportion of material, can very well, and choose to separation between the strong magnetic separation machine, dont result in the belt conveyor and strong magneticheavy separator. 4 with large capacity plan selected mineral machine screw recovery of hematite and most of hematite, ore belt conveyor with strong magnetic re-election in jixuan dont, dont index and scheme 2, but with less investment, convenient operation, the production cost, etc.5 initial economic benefitsby day, 12 t with 400 million t contain iron 39% of tailings calculation, the price is respectively: iron ore 51% of iron essence for 85 yuan/t, 55% of 105 yuan/t, for to 56%110 yuan/t, 0 per kwh 7 yuan per ton, water 0. 5 yuan.5. 1 equipment investment and depreciationscheme in 1:20 million yuan of magnetic separation machine, magnetic separator 65 million yuan, the other one auxiliary equipment, 5 million yuan90 million yuan. strong magnetic separation machine according to 10 years of depreciation, magnetic and complementaryhelp equipment by 5 years in november as depreciation, depreciation, 50,000 yuan. in magnetic separation scheme 2:20 million yuan, with a strong magnetic flux of 20 million yuan, a heavy separator and other auxiliary equipment5 million yuan of rmb, 45, according to 5 years, annual depreciation depreciation9 million yuan.plan 3:20 million yuan of magnetic separation machine, bed 30 million yuan, and other auxiliary equipment 50,000 yuan, according to the bed 3 years of depreciation, other for 5 years, 15 million yuan, depreciation. scheme 4: double helix processing machine, 10 sets of eight million strong magnetic separator a 8 million yuan, weight and other auxiliary equipment5 million yuan, total 21 million yuan rmb, the spiral dressing machine 3 depreciation,for five years, and in other 5 3 yuan for depreciation.5.2 the direct costs of production and operation managementsolution: equipment installation power 90kw/h, every tons of mineral water 4 t. in direct costs of production for 69. 36 million yuan, and the birthproduction operation management.solution: equipment installation 20kw/h, processing power consumption per ton, in 4 t mine production costs for 34 directly 2008 yuan,production and operation management is more convenient.plan 3: equipment installed power 50kw/h, each processing1 t mineral water consumption in straight up to 60 t, born to this 2 million yuan for 61, production and operation management.solution: 4 17kw power equipment installation, each processing/h1 t mineral water 3 t. in direct costs of production for 26 568 millionyuan, and the most convenient operation management.5. 3 outputscheme of iron 1 51% of iron concentrate, the annual 85092 t j 282 million for 723.scheme of ferrous 55% of two iron concentrate, the annual 64440 t for 676. 62 million.plan 3 of iron concentrate containing iron 55%, the annual 68496 t j 208 million for 719.scheme of ferrous 56% of four iron concentrate 63120 t, annual output for 694. 320,000 yuan.5. 4 years maoriannual gross output = production costs - in - directly in depreciationcase 1: the hair fang. 282 - the 723 = 69. 36-11. 5 = 642 422 (million).solution: in maori = 676. 62-34 08-9 = 54 (yuan) 633.plan 3: the maori = 719. 208-61. 2-15 = 145821476. in (yuan)solution: 4 years maori = 694. 32-26-5. 3 = 568 2.2.4.5.4.3 1 (yuan) 452.the comparative, scheme 3 april 1 solution scheme in 2 square.from the investment, operation management, economic benefit comparative,4 the best solution, less investment, operation convenience, dynamic force and water consumption and advantages, suitable for working capitallittle of small and medium-sized enterprises.6 theorythrough the water consumption, investment and operation management and economic benefit of analysis, the processing machine + belt of strong magnetic separator weight is weak magnetic minerals from tailings of selected the best process.从弱磁选尾矿中回收铁的工艺探讨管则皋1前言90 年代以前, 中小型半氧化铁矿山均采 用弱磁选回收强磁性的铁矿物, 磁性相对较 弱的假象赤铁矿、赤铁矿、褐铁矿由于采用强 磁选别投资大或生产成本高, 铁精矿价格又 相对较低而作为尾矿堆存在尾矿库中。 随着 科学技术的发展, 对矿产资源综合利用和环 境保护的重视, 以及铁精矿价格的提高, 以低 成本回收磁性较弱的假象赤铁矿、赤铁矿、褐 铁矿已成为可能。 本研究矿样取自广东阳春 某半氧化铁矿山的弱磁选尾矿, 采用多个方 案均能较好地回收磁性相对较弱的铁矿物, 铁回收率达到 76% 93% , 铁精矿品位达到56% 51% 。2试样性质本试样直接从尾矿库中采取, 矿泥相对 较少, 含铁 39% , + 0. 2mm 粒级铁品位相对较低, - 0. 074mm 粒级铁品 位较高, 达 56. 26% 。试样中铁主要以假象赤 铁矿、赤铁矿、褐铁矿的形式存在, 脉石矿物主要为石英。3选别流程的确定由于试样中铁矿物主要以假象赤铁矿、 赤铁矿、褐铁矿的形式存在, 而脉石矿物主要 为石英, 所以有用矿物与脉石矿物之间既存 在磁性的差异又存在比重的差异, 可以用磁 选、磁重选、重选+ 磁重选等选别方案来分离 铁矿物和脉石矿物。4选别流程和结果4. 1选别流程研究研究了用中磁磁选机+ 强磁磁选机 ( 方 案 1) , 中 磁 磁 选 机 + 带 式 中 强 磁 磁 重 选 机 (方案 2) , 中磁磁选机+ 摇床 ( 方案 3) , 螺旋 选矿机+ 带式中强磁磁重选机 (方案 4) 四个选别方案来分离铁矿物与脉石矿物,4. 2结果分析从表 2 5 的结果可知, 方案 1 铁回收率 最高为 93. 56% , 方案 3 次之为 81. 37% , 方 案 2 和 方 案 4 相 近, 分 别 为 76. 83% 和76. 52% , 铁精矿品位方案 4 最高为56. 56% ,方 案 2 和 方 案 3 相 近 分 别 为 5 5. 4 5 % 和55. 27% , 方案 1 最低为 51. 28% 。 从方案 1、 方案 2 和方案 3 的精矿 2 比较可知, 强磁选机对弱磁性矿物的回收效益最好, 铁回收率 对原矿为 70. 66% , 其次为摇床 58. 41% , 最 差为带式中强磁磁重选机 53. 87% ; 铁精矿 品位摇床和带式中强磁磁重选机相近, 分别 为 5 3. 5 5 % 和 5 3. 4 5 % , 强 磁 选 机 最 低 为48. 87% 。 主要原因是强磁选机把一些铁矿 物与脉石矿物的连生体选到铁精矿中, 从而 提高了铁的回收率, 降低了铁精矿品位。带式 中强磁磁重选机虽加强了对磁性矿物的回 收, 但为了提高精矿品位, 需加水清洗, 这样增加了带面的矿浆流速, 使一些连生体及细 粒级铁矿物进入到尾矿中, 降低了铁的回收 率。摇床是一种分选精度较高的设备, 只要物 料间存在一定的比重差, 就能很好地分离, 所 以, 选别结果介于强磁选机和带式中强磁磁重选机之间。 方案 4 采用大处理量的螺旋选 矿机回收大部分的假象赤铁矿和赤铁矿, 中 矿再用带式中强磁磁重选机选别, 选别指标 与方案 2 相近, 但具有投资少、操作方便、生 产成本低等优点。按日处理 400 t, 年处理 12 万 t 含铁 39% 的尾矿计算, 价格分别为: 含铁 51% 的铁精 矿 为 85 元/t, 55% 的 为 105 元/t, 5 的 为110 元/t; 每度电 0. 7 元, 每吨水 0. 5 元。5初步经济效益比较按日处理400t, 年处理12 万t 含铁39%的尾矿计算, 价格分别为: 含铁 51%的铁精矿为 85 元 t, 55%的为 105 元 t, 56%的为110 元 t; 每度电0 . 7 元, 每吨水0 . 5 元。5. 1设备投资与折旧方案 1: 中磁磁选机一台 20 万元, 强磁 选机一台 65 万元, 其他辅 助设备 5 万元, 共90 万元。强磁选机按 10 年折旧, 中磁机及辅助设备按 5 年折旧, 年折旧费为 11. 5 万元。 方案 2: 中磁磁选机一台 20 万元, 带式 中强磁磁重选机一台 20 万元, 其他辅助设备5 万元, 共 45 万元, 均按 5 年折旧, 年折旧费9 万元。方案 3: 中磁磁选机一台 20