外文翻译---鞍山地区贫赤铁矿选矿工艺新进展.docx

附录一：科技英语翻译及原文鞍山地区贫赤铁矿选矿工艺新进展摘要：通过对鞍山地区三大贫赤铁矿选矿厂的工艺流程和指标的介绍,分析了各选厂在工艺流程方面的各自特点及存在的一些问题,指出强磁机和扫中磁机的引入,稳定了工艺流程,提高了分选效率;粗粒重选有利于铁矿物的充分回收;阴离子反浮选保证了精矿品位合格。鞍山地区贫赤铁矿工艺流程的成功应用,为我国贫赤铁矿选矿开辟了一条新的途径。关键词：贫赤铁矿强磁选中磁重选阴离子反浮选近年来,由于钢铁产品需求量激增,铁矿资源变得尤为重要,我国铁矿资源十分丰富,但是难选的贫赤铁矿所占比重很大。鞍钢是我国重要的钢铁工业基地,随着大规模工业开采的不断进行, 贫赤铁矿的产量将占矿石总产量的50%以上。鞍山矿业公司是目前鞍钢主要的铁矿供应基地,生产的铁矿石主要是细粒嵌布的贫赤铁矿。近几年针对鞍山地区三大贫赤铁矿选矿厂,即齐大山选矿厂,调军台选矿厂,东鞍山烧结厂进行了选矿试验研究,其中对齐大山选矿厂和东鞍山烧结厂进行了大规模的技术改造,使新的贫赤铁矿工艺流程得以实施。齐大山选矿厂采用阶段磨选,重选- 磁选- 反浮选流程,调军台选矿厂采用连续磨矿, 弱磁- 强磁- 反浮选流程,东鞍山烧结厂采用连续磨矿,中矿再磨, 重选- 磁选- 反浮选流程。生产实践表明,这3个选矿厂的工艺流程,取得了良好的技术经济效果。1、矿石特征鞍山地区贫赤铁矿以赤铁矿和假象赤铁矿为主。均系前震旦纪沉积变质磁铁矿石英岩或赤铁矿- 磁铁矿石英岩,矿体厚大,储量丰富,地表氧化程度较深,且深部逐渐过渡到磁铁矿。矿石的化学组成十分简单,主要元素为铁和硅,其它有害杂质甚少,矿石品位一般在25% 30%之间变化,属于高硅低硫磷贫赤铁磁铁矿石英岩。矿石主要金属矿物为赤铁矿, 假象贫赤铁矿,镜铁矿以及少量的菱铁矿;脉石矿物主要为石英,另有少量的角闪石,透闪石,绿泥石等硅酸盐矿物。少量矿石结晶粒度较细,呈细粒不均匀嵌布。铁矿物最大为1. 0 mm,最小为0. 005 mm,一般分布在0. 3 0. 04 mm之间。2、工艺流程及选别指标（1）齐大山选矿厂工艺流程及主要工艺指标。原矿经一段磨矿分级后,一次溢流经水力旋流器粗细分级,粗粒产品由螺旋溜槽处理,细粒经弱磁、强磁选别,混磁精反浮选。粗,细粒二者均产出最终精矿。重选精螺尾与扫螺精经扫中磁后的扫中磁精再磨返回水力旋流器。扫中磁尾矿、强磁尾和反浮选尾矿合并为综合尾矿。综合选别指标为铁精矿品位67. 50% ,金属回收率75. 00%。工艺流程见图1。图1齐大山选矿厂红铁矿选矿工艺流程(2) 调军台选矿厂工艺流程及主要工艺指标。原矿经两段连续磨矿, 二次溢流经弱磁选和强磁选后,二者组成混磁精,混磁精反浮选得最终精矿;弱磁尾矿浓缩后,经强磁机抛尾,强磁机尾矿和反浮选尾矿组成综合尾矿。综合选别指标为铁精矿品位67. 50% ,金属回收率75. 00%。工艺流程见图2。图2调军台选矿厂红铁矿选矿工艺流程(3)东鞍山烧结厂工艺流程及主要工艺指标。原矿经两段连续磨矿, 二次溢流经水力旋流器辅助分级后, 粗粒产品由螺旋溜槽选别,细粒经弱磁、强磁选别,混磁精反浮选。粗,细粒二者均产出最终精矿。重选精螺尾与中磁精再磨返回水力旋流器。扫中磁尾矿、强磁尾和反浮选尾矿合并为综合尾矿。综合别指标为精矿品位64. 50% , 金属回收率65. 00%。工艺流程见图3。3、工艺特点及分析鞍山地区三大贫赤铁矿选矿厂的选别流程之所以能够获得良好的技术指标,主要是有效地利用了矿物的磁性、密度、粒度等特征的差异,充分发挥各选别设备的特有作用,选用了性能良好的反浮选药剂,实行多工艺联合作业的结果。(1)强磁机和扫中磁机的引入,稳定了工艺流程,提高了分选效率。齐大山选矿厂和东鞍山选矿厂工艺改造后,流程中都采用了强磁机抛弃磁选尾矿,扫中磁机抛弃重选尾矿。实践证明立环强磁机和扫中磁机具有工作稳定,分选效率高,适应性强,不易堵塞等特点。其中立环强磁机不易堵塞的特点是平环强磁机无法比拟的。它能有效地抛弃大量合格尾矿,为下一段选别作业创造良好的条件,是一种高效率的粗选设备。图3东鞍山烧结厂红铁矿选矿工艺流程(2)粗粒重选有利于铁矿物的充分回收。重选具有不用药剂,避免污染,结构简单,工作可靠,选别效率高等优点。但它的最大缺点是回收细粒级矿物效率低,所以长期以来对细粒嵌布的矿石难以得到广泛应用。由于鞍山地区贫赤铁矿嵌布的不均匀性,根据螺旋槽的技术特性,在齐大山选矿厂和东鞍山烧结厂都采用了螺旋流槽回收粗粒矿物,重选作业精矿品位达到65%,产率15%。可见重选作业在两个选矿厂的工艺流程中发挥了重要作用。(3)阴离子反浮选工艺的特点。在鞍山地区3 个贫赤铁矿选矿厂的工艺流程中,都采用了反浮选工艺。反浮选工艺条件为浮选温度30, 浮选浓度33% ,矿浆ph = 11. 5; 浮选药剂: ph 调整剂为naoh, 抑制剂为淀粉, 活化剂为cao, 捕收剂为ra715 (东鞍山烧结厂) 、ra515 (齐大山选矿厂) 、lky(调军台选矿厂) 。反浮选工艺都采用一次粗选、一次精选、三次扫选工艺。反浮选工艺条件比较适应鞍山地区贫赤铁矿的细粒嵌布及脉石矿物组成单一的特点,该工艺确保了精矿品位的合格。(4)齐大山选矿厂阶段磨选和调军台选矿厂连续磨矿的流程对比。调军台选矿厂的弱磁- 强磁- 反浮选工艺,虽然充分利用了矿物的磁性,但它要求一段磨矿将矿石磨至- 200目占85%左右,这样不仅增加了磨矿费用,而且造成了矿石的过粉碎,降低了金属的回收率。磨矿产品- 0. 010 mm 级别的产率高达30% ,而在尾矿中- 0. 010 mm 级别的流失占尾矿金属的50% , 即有一半的金属损失于- 0. 010 mm的细级别中。可见要进一步提高金属回收率,采取措施降低磨矿产品中- 0. 010 mm级别的含量,是十分重要的。根据齐大山铁矿粒度嵌布的特点,当磨矿粒度为- 200目占55% 60%时, 铁矿物的单体解离度达到65% 70%,因此,矿石在粗磨的状态下,即可回收相当数量的铁精矿,从而大大减少进入下一段再磨再选的矿量。因此说齐大山选矿厂阶段磨选是合理的。从上述分析来看, 阶段磨选适合分选鞍山地区的贫赤铁矿石。4、结论(1) 鞍山地区3个贫赤铁矿选矿厂新工艺的生产实践表明,指标稳定,取得了良好的技术经济效果,为贫赤铁矿选矿找到了一条新的途径。尤其是齐大山选矿厂和东鞍山烧结厂的粗细分选工艺能有效地发挥重选和浮选工艺各自的优势,适应了重选和浮选作业对给矿粒度的不同要求,实现了窄级别入选的合理分选过程,有利于提高选矿的分选指标。(2) 齐大山选矿厂和东鞍山烧结厂改造后采用的立环强磁机和扫中磁机经生产实践证明,其结构简单,工作可靠,操作方便,分选效率高。ra715捕收剂等药剂在几大选厂的成功应用,说明药剂具有良好的捕收性及选择性,对于选别鞍山地区贫赤铁矿有很强的适应性。(3) 调军台选矿厂为了进一步提高分选效率, 必须采取有力措施,降低磨矿产品- 0. 010 mm级别的生成量以及提高该级别的金属回收率。参考文献1、张宏柯, 李传曾. mvs型电磁振动高频振网筛及其工业实践(上) . 金属矿山, 2004 (1) : 35 382、田嘉印. 铁矿山选矿技术发展现状及今后应加强的工作. 金属矿山, 2004 (2) : 27 31英文翻译：new advance in dressing process for lean hema tite in an shan d istr ictreverse flotationabstractbased on the introduction of the technological p rocesses and indexes of the three large lean hematite con2 centrators in anshan district, the characters and p roblems in the p rocess of the three concentrators are analyzed. it consid2 ers that use of the high intensity magnetic separator and the medium intensity magnetic separator for scavenging stabilizes the p rocess and increases separation efficiency. the gravity separation of coarse ores is favorable for sufficient recovery of i2 ron mineral. the anionic reverse flotation ensures qualified concentrate grade. successful app lication of the p rocess for the lean hematite in anshan district p rovides a new way to dress the lean hematite in our country. keywordslean hematite, high intensity magnetic separation, medium intensity field; gravity separation, anionicin recent years, due to surge in demand for steel products, iron ore resources has become more important, chinas iron ore resources are very rich, but difficult to choose the large proportion of poor hematite. anshan iron and steel is an important iron and steel industrial base, with ongoing large-scale industrial mining, poor hematite ore production will account for more than 50% of total production. anshan anshan mining company is the main supply base of iron ore, iron ore production was mainly fine-grained hematite poor cloth embeddedanshan area in recent years for the three poor hematite mineral processing plant, which qidashan concentrator, diaojuntai concentrator, donganshan sintering plant beneficiation tests carried out research, which align the mountains concentrator and sintering plant were donganshan large-scale transformation to make the new process implemented poor hematite. qidashan concentrator using grinding stage election re-election - magnetic separation - anti-flotation process, diaojuntai concentrator with continuous grinding, weak magnetic - magnetic - anti-flotation process, in donganshan sintering plant using a continuous grinding, in the mine re-grinding, re-election - magnetic separation - anti-flotation process. production practice shows that these three concentrator process and achieved a good technical and economic effect. 1、 ore characteristicspoor anshan hematite to hematite and hematite illusion. belong to the pre-sinian metamorphic sedimentary magnetite or hematite quartz - magnetite quartzite, ore heavy, abundant, deeper level of surface oxidation, and the gradual transition to magnetite in deep. the chemical composition of ore is very simple, the main elements of iron and silicon, and other harmful impurities little ore grade generally between 25% and 30% of the changes is a high silicon low parathion poor hematite magnetite quartzite. major metallic mineral ore hematite, hematite poor illusion, mirror, and a small amount of siderite iron ore; gangue minerals are quartz, while a small amount of amphibole, tremolite, chlorite and other silicate salt minerals. a small amount of mineral grain size and smaller, fine-grained heterogeneous embedded fabric. iron minerals up to 1. 0 mm, minimum 0. 005 mm, usually found in 0. 3 0. 04 mm between.2、 process and sorting index(1) qidashan dressing plant and process criteria.grade ore, after a period of grinding, a run-off by the thickness of hydrocyclone classification, coarse product from the spiral chute handle, fine by weak magnetic, strong magnetic do, mixed magnetic fine reverse flotation. coarse, fine they both output the final concentrate. precision screw tail and re-election sweep by sweeping the magnetic screw fine after the scan in the magnetic fine regrinding return hydrocyclone. sweep the magnetic tailings, magnetic tail and the anti-flotation tailings into consolidated tailings. integrated sorting index of iron concentrate grade 67.50%, metal recovery 75.00%. process shown in figure 1.figure 1 qidashan red iron ore concentrator process(2) diaojuntai concentrator process and process criteria. after two consecutive grinding ore, the second run-off by the weak and strong magnetic magnetic separation, the two mixed magnetic fine form, mixed magnetic fine was ultimately anti-flotation concentrates; weak magnetic tailings concentrated by magnetic machine throwing tail, magnetic machines and anti-flotation tailings tailings tailings to form integrated. integrated sorting index of iron concentrate grade 67.50%, metal recovery 75.00%. process shown in figure 2.figure 2 diaojuntai concentrator process of red iron ore(3) donganshan sintering plant process and its key process indicators.after two consecutive grinding ore, the second hydrocyclone overflow by the secondary classification, the coarse product from the spiral chute, sorting, fine-grained by the weak magnetic, strong magnetic do, mixed magnetic precision anti-flotation. coarse, fine they both output the final concentrate. precision screw tail re-election and return of magnetic fine regrinding hydrocyclone. sweep the magnetic tailings, magnetic tail and the anti-flotation tailings into consolidated tailings. other indicators for the concentrate grade of comprehensive 64.50%, metal recovery 65.00%. process shown in figure 3.3, features and analysis technologyanshan district three poor hematite concentrator sorting liu cheng was able to get a good technical indicators, mainly the effective use of mineral magnetic, density, size and other characteristics of the difference, give play to the unique separation equipment the role of the good performance of selected anti-flotation agent, the multi-process the results of joint operations.(1) magnetic machine and scan the introduction of magnetic machine, stability of the process, improve the separation efficiency. qidashan donganshan concentrator concentrator and process reform, the process is abandoned by a magnetic separator tailings machine, sweeping the magnetic re-election machine abandoned tailings. proved vertical circular magnetic machine and scan the magnetic machine has advantages of stable, high separation efficiency, adaptability, easy plug and so on. central magnetic neutral plane is not easy to plug in is characterized by ring magnetic machine can not match. it can effectively abandoned a large number of qualified tailings, a sorting operation for the next and create favorable conditions for a rough selection of high-efficiency equipment.(2) coarse-grained re-election favor the full recovery of iron minerals. re-election with no agent, to avoid contamination, simple structure, reliable operation, the sorting efficiency. but its biggest drawback is the low efficiency of recovery of fine grade mineral, it has long been embedded on the fine cloth of ore difficult to be widely applied. poor hematite as anshan inhomogeneity embedded in cloth, according to the technical characteristics of spiral groove in qidashan concentrator and sintering plant donganshan with a helical groove are coarse mineral recovery, re-election operation concentrate grade of 65 %, yield 15%. see re-election process in mineral processing plant operating in the two play an important role.(3) the characteristics of anionic anti-flotation process. in the anshan area three poor concentrator process in hematite, have adopted anti-flotation process. anti-flotation flotation process conditions at 30 , 33% of flotation concentration, pulp ph = 11. 5; flotation reagent: ph adjusting agent is naoh, inhibitors of starch, active agent for the cao, collector for the ra715 (donganshan sintering plant), ra515 (qidashan concentrator), lky (diaojuntai concentrator). anti-flotation process have adopted a rough election, once selected, three sweep the election process. comparison of anti-flotation process conditions to adapt to the poor anshan grained hematite and gangue minerals embedded in fabric to form a single feature, the process to ensure that the concentrate grade qualified.figure 3 donganshan red iron ore sintering plant process(4) grinding qidashan concentrator stage selection and diaojuntai concentrator comparison of continuous grinding process. diaojuntai concentrator weak magnetic - magnetic - anti-flotation process, although the full use of magnetic minerals, but it requires some grinding, grinding ore to - 200 mesh is about 85%, so not only increases the cost of grinding and caused over crushed ore, reducing the metal recovery. grinding minerals - 0. 010 mm level of the yield up to 30% in the tailings - 0. 010 mm level of the loss of 50% of total metal tailings, that is half of metal loss in the - 0. 010 mm of level of fine. to further improve the metal recovery can be seen to take measures to reduce the grinding mineral products in the - 0. 010 mm level of content, is very important. according to size qidashan iron fabric features embedded, when grinding grain size of - 200 mesh 55% to 60%, the iron minerals monomer dissociation degree of 65% to 70%, therefore, in the coarse ore grinding of the state, you can recover a considerable number of iron ore, thus reducing the next section of regrinding the ore. so, to say qidashan concentrator stage grinding and separation is reasonable. from the above analysis point of view, the election stage grinding anshan area for sorting poor hematite.4, conclusions (1) anshan area three poor hematite mineral processing plant production practice of new technology that targets stability, and achieved good technical and economic effect, for the poor hematite mineral fou