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Beneficiation Test

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EXPERIMENTAL RESULTS Content 1 Preface 2 Iron ore sample of experimentation 3 Chemical property of the iron ore 4 Beneficiation experimentation 4.1 Beneficiation experimentation scheme 4.2 Experimentation of natural iron ore’s grinding fineness condition 4.3 Experimentation of magnetic field intensity condition 4.4 Strong intensity magnetic separation experimentation 4.5 Flotation flow experience 4.6 Flow experimentation 5 The iron ore’s grindability experimentation 6 Product checking 6.1 Multi-
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  EXPERIMENTAL RESULTSContent 1 Preface2 Iron ore sample of experimentation3 Chemical property of the iron ore4 Beneficiation experimentation4.1 Beneficiation experimentation scheme4.2 Experimentation of natural iron ore’s grinding fineness condition4.3 Experimentation of magnetic field intensity condition4.4 Strong intensity magnetic separation experimentation4.5 Flotation flow experience4.6 Flow experimentation5 The iron ore’s grindability experimentation6 Product checking6.1 Multi-elements analysis of experimentation samples6.2 Testing of the experimentation product’s consistency7 Conclusion and suggestion    Preface   One limited company in India consign the job to do the research for how to beneficiate theiron ore in order to exploit and utilize low grade iron ore resource, find out the iron ore’swashability, grading method and best process flow of reclaiming the useful magnetic mineralin the iron ore, ascertain the process parameters and the most reasonable economicindicator of beneficiation.Beneficiation experimentation was started in Jan. 2, 2008 and ended in Mar. 6, 2008.According to the consignor’s requirements, the xxx completed a series of work to achieve thecontract’s requirement during the period, including analyzing the natural mineral’s chemicalproperty, measuring the ore’s grindability, ascertaining the grading method andexperimentation flow researching of reclaiming the main iron mineral etc.The xxxx processed the grinding the iron ore---- weak magnetic separation---strong intensitymagnetic separation---flotation flow experimentation, the final experimentation result as chart1-1The final result of the beneficiation experimentation:Process flowExperimentationconditionsProductdescription%Ratio ofproduction%grade%Ratio ofreclaimingoreconcentrate85.36 67.65 96.68tailings 14.64 9.21 3.32grinding theiron ore—weakmagneticseparation—strongmagneticseparation--flotationfineness : -200 65%weak magneticfield : 151.20Ka/mweak magneticfield : 1.1TNatural ore 100.00 59.23 100.00 2 Iron ore sample of experimentation The iron ore sample in the experimentation is adopted from iron ore mine and sent to xxxx by the consignor. The iron ore sample weights 300 Kg, which particle size is 10 ~ 。 0mmwe can’t check the iron ore sample’s representative because the consignor didn’t provide theiron ore samples’ natural character and any geological information. The experimentation only  researches and analyzes the received iron ore and only be responsible for theexperimentation result of the received iron ore. Chemical property of the iron ore Firstly Crush the iron ore sample to get 2-0mm experimentation sample, then mix themevenly and take samples to send them to five laboratories to analyze their chemicalcomposition. The final average result as follows, chart 3-1, 3-2: ( ) % average result of natural iron ore’s multi-elements ananlysisChart 3-1component TFe SFe FeO S P(% ) Content 59.23 57.76 1.85 0.06 0.08component CaO MgO SiO 2 Al 2 O 3  (%)content 12.70 2.64 2.02 0.73 4.19analysis result of the natural iron mineral Chart 3-2Mineral name Content (%) Proportion (%)Magnetite 3.82 6.45Martite 2.39 4.04-hemetite 25.12 42.41Hematite 25.47 43.00Ferric carbonate 0.42 0.71Ferric silicate 1.96 3.31Pyrite 0.05 0.08total 59.23 100According to the result of sample’s multi-elements analysis and hard phase analysis, we canget that the main useful mineral in the ore is hematite; the next is magnetite and Martite. Itcontains 31.33% magnetite and very little sulfur (harmful impurity), but contains morephosphorus; TFe/FeO=31.48 , it is oxidized iron ore (red iron ore). 4 Beneficiation experimentation4.1 Beneficiation experimentation scheme According to the result of the iron ore sample’s muti-elements analysis and hard phaseanalysis, we can get that the main mineral is hematite which occupies 85.16% of Fe in theiron ore, and the -hematite with more stronger magnetism occupies 50.66% of the wholehematite. The magnetic Fe occupies 31.33% of the whole Fe, which is easily separated byweak magnetic separation; the weaker magnetic hematite (42.02%) has to be separated bystrong intensity magnetic separating etc. technology to reclaim them. The ferric carbonateand Ferric silicate occupies 2.38% of Fe, which is much more hard to reclaim under presenttechnology. It is unnecessary to reclaim them because they just occupy very smallproportion.Concluding the above and integrating the domestic and abroad same kind practicalbeneficiation experimentation we confirm the experimentation as: grinding the iron ore----weak magnetic separation---strong intensity magnetic separation-----flotation process flow toreclaim the Fe mineral in the iron ore. 4-2 Experimentation of natural iron ore’s grinding fineness condition Using Ball Mill to grind 100 Kg (which is 2~0mm) natural iron ore sample for different time tofind out the grinding curve. And grind the samples to -200 mesh (-0.075mm) 45%, 55%,65%, 85%, 95% etc. fineness according to the grinding curve, then using Φ 400×600 drumtype weak magnetic separator whose fixed magnetic separation field intensity is 151.20Ka/m  to process the experimentation of natural iron ore’s grinding fineness condition. Theexperimentation result as chart 4-1  - Natural iron ore’s primary grinding fineness condition experimentation chartChart 4-1Particle size (-0.075mm)Productionname(%)Ratioof production(%)grade(%)Ratioof reclaimingore concentrate 55.97 67.59 65.02Tailings 44.03 46.22 34.9845Given ore 100.00 58.18 100.00Oreconcentrate53.88 68.09 63.01tailings 46.12 46.69 36.9955given ore 100.00 58.22 100.00ore concentrate 51.36 68.60 60.53tailings 48.64 47.24 39.4765given ore 100.00 58.21 100.00Oreconcentrate46.81 69.43 55.85tailings 53.19 48.30 44.1585given ore 100.00 58.19 100.00Oreconcentrate44.24 69.87 53.10Tailings 55.76 48.96 46.9095given ore 100.00 58.21 100.00According to the experimentation of chart 4-1,we can get that the grade of ore concentraterise to 69.87% from 67.59% along with the grinding fineness rising to 95% -200 mesh (-0.075mm)from 45% -200 mesh (-0.075mm). The grade of ore concentrate doesn’t raisemuch, which indicates that strong magnetic mineral and gangue’s inlayed grain is coarser.Taking grade, the rate of production and reclaiming, and the grinding cost into consideration,we confirm that the experimentation adopts first stage grinding fineness as 65% -200 mesh. 4 .... 3 Experimentation of magnetic field intensity condition We did experimentation of weak magnetic field intensity condition according to the grindingfineness as -0.075mm occupying 65%. The magnetic field intensity in the experimentation asfollows: 103.45Ka/m 、 、 119Ka/m151.20Ka/m, and the experimentation result as chart 4-2:Chart 4-2 Experimentation of primary magnetic field intensity conditionKa/mMagnetic fieldintensityProductionname(%)The rate ofproduction(%)grade(%)The rateofreclaimingCoarse oreconcentrate51.93 68.57 61.15tailings 48.07 47.06 38.85103.45given ore 100.00 58.23 100.00Coarse oreconcentrate52.77 68.33 61.98Tailings 47.23 46.84 38.02119.37given ore 100.00 58.18 100.00
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