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For the purpose of researching of the micromanganese-nodule floatability, the test was performed by means of the flotation experiment. The sample of flotation experiment used the micromanganese nodule obtained from siliceous deep-sea clay. The flotation condition in the flotation experiment were as follow. Sample size : 65mesh ∼ 200mesh Conditioning time : 10min Flotation time : 4min Air amount : 20㎖/min Promoter : DACI, Kerosene pH regulator : HCI, CaO From the above test the flotation results were summerized as follow. (1) The micromanganese nodule recovery was the best at pH 7∼9 (2) The micromanganese nodule recovery was the best using DACI+Kerosene in the promoter at pH 7. (3) The best recovery of micromanganese nodule was 80% using DACI 50㎎/ℓ +Kerosene 200㎎/ℓ in the promoter at pH 7.
The applicability of a sulphation-floatation process was considered in order to depress of galena in a mineral processing process of complex sulphide ores. The galena will be depressed in the floatation step because of the formation of a PbSO₄ film on the surface of galena. when a PbS bulk concentrate is treated with sulphuric acid. The optimum conditions of the sulphation treatment for depressing galena were found to be 30%. and about 5 minutes of retention, with 18 Vol. % H₂SO₄. under these conditions. galena was sulphated only slightly and thus in complete depression in the floatation.
For the purpose of reserching the floatability of Manganese-nodule, the test was porformed by means of the Zeta potential measuring and the flotation experiment for Todorokite, δ-MnO₂ The flotation condition in the flotation experiment were as follow. sample : Todorokite, δ-MnO₂ sample size : 65 mesh - 200 mesh condition time : 10 min flotation time : 4 min air amount : 20 ㎖/min promoter : D.A.Cl, S.D.S pH regulator : HCl, CaO From the above test the flotation result were summerized as follow. 1. The point of zero charge(PZC) of Todorokite in the Zeta potential measuring was pH4.3. 2. The point of zero charge of δ-MnO₂ in the Zeta potential measuring was pH3.0. 3. The best floatability of 8 δ-MnO₂ was 85% as a function of pH3.5 using DACl 10㎎/ℓ 4. The best floatability of Todorokite was 40% as a function of pH3.5 using DACl 10㎎/ℓ 5. The most difference of floatability of the δ -MnO₂ and Todorokite was 40% using DACl 10m㎎/ℓ at pH3.5
For the purpose of reserching the flotability of mica from the Granite, the flotation was performed by means of sea water and by means of natural water. Two types of promoter were used for the test : aionic type promoter(petroleum sulfonate) and cationic type promoter(R-3420). The results of study were as follow. In case of using R-3420 promoter by the natural water, the Mica has been recovered up to 80% with its grade of 73%. It was performed under the condition of using R-3420 pro-moter of 800g/t at pH 2.5. In case of using sea water, the rate of recovery and its grade were for loss than the above.
For the purpose of researching of the manganese recovery from the micromanganese-nodule, the test was performed by means of the ζ-potential measuring and of the floatation experiment for manganese recovery of the micromanganese nodule obtained from siliceous deep sea clay. The floatation condition in the floatation experiment were as follow. Sample size : 65mesh∼200mesh. Condition time : 10 min. Flotation time : 4 min. Air amount : 20㎖/min. Promoter : DAS, NaDS. Kerosene Dpresser : Na_2SiO_3(Water glass) PH regulator : HCl, CaO From the above test the flotation results were summerized as follow. (1) ζ-potential of micromanganese-nodule was minus(-) in the pH 3∼12. (2) The manganese recovery from the micromanganese- nodule was the best at pH 7. (3) The manganese recovery from the micromanganese- nodule was the best using DACI 50㎎/ℓ + kerosene 200㎎/ℓ in the promoter at pH 7. (4) The best manganese recoverv of the micromanganese-nodule was 80% using DACI 50㎎/ℓ + kerosene 200㎎/ℓ in the promoter and water glass 500㎎/ℓ in the depresser at pH 7. In the futurity, continuous study of the micromanganese-nodule in many kinds of site should be required.
For the purpose of researching the floatability of 10Å Manganite and δ-MnO_(2) from Manganese layer, the test was performed by means of the Zeta potential measuring and the floatation experiment for 10Å Manganite, δ-MnOcc. The floatation condition in the floatation experiment were as follow. Sample : δ-MnO_(2), 10Å Manganite from Manganese layer Sample size : 65mesh ~ 200mesh. condition time : 10min. Flotation time : 4 min. Air amount : 20ml/min. Promoter : DACl, NaDS, Kerosene Dpresser : Na_(2)SiO_(2)(Water glass) PH regulator : HCl, CaO From the above test the floatation result were summerized as follow. 1) It was PH 2.3 that the PZC of the 10Å Manganite - rich from Manganese nodule in the ξ - potential measuring. 2) It was PH 3.0 that the PZC of the δ-MnO_(2)- rich from Mangnaese nodule in the ξ - potential measuring. 3) It was 35% using DACl 15mg/l at PH 2.7 that the most difference of floatability of the δ-MnO_(2)- rich and 10Å Manganite - rich.
For the purpose of reserching the floatability of Managanese-nodule, the test was proformed by means of Zeta potential measuring and the flotation experiment for 10Å Manganite. The flotation condition in the flotation experiment were as follow. sample : Todorokite (0.3gr) sample size : 65 mesh ~ 200 mesh condition size : 10 min flotation time : 4 min air amount : 20 ㎖/min promoter : D.A.cl, S.D.S. PH regular : Hcl, CaO From the test the flotation result were summerized as follow. 1. The isoelectric point of 10Å Manganite in the Zeta potential measuring was pH 4.3. 2. The floatability of 10Å Manganite was 80% as a function of pH5 using 10mg/ℓ of D.A.cl. 3. The recovery of 10Å Manganite was best when the floatability of 10Å Manganite was 90% as using D.A.cl 80mg/ℓat PH 2.7.
The Jeungsan-Sabuk area(northern part of Samchok Coalfield) in the area of northern limb of Baekunsan syncline, comprises Precambrian schist complex, Cambro-Ordovician Formation(Chosun Supergroup), Carbo-Permian Formation(Pyongyang Supergroup) and Cretacious intrusive rocks. Chosun Supergroup is divided into nine formations, that is, Jangsan quartizite formation, Myobong formation, Pungchon limestone formation, Hwajeol formation, Dongjeom quartizite formation, Dumugol formation, Maggol limestone formation, Jigunsan shale formation and Duwibong limestone formation in ascending order. Pyongyang Supergroup is subdivided into five formations, namely, Manhang formation, Geumcheon formation, Jangseong formation, Hambaeksan formation and Dosagok formation from older to younger. Deposition of the Chosun Supergroup, begininng with Jangsan quartizite formation, started on the steadily subsiding stable shelf. This continued subsidence of the shelf was accompanied by some intermittent oscillation. The sedimentary basin turned into a miogeosyncline, gradually depositing th Myobong formation, Pungchon limestone formation and the peculiar limestone of thythmic pattern(Hwajeol formation), in ascending order. On the other hand, the land part was lowered to a peneplain with the subsidence of sea floor. At the beggining of Ordovician, the carbonate deposition was temporarily brought to a halt by the emerged Dongjeom sea floor where fine sands were deposited to form Dongjeom quartizite formation. The Dongjeom foor, again, became a miogeosynclinal environment which persisted until the end of middle Ordovician. Paleozoic rocks in the area are affected by E-W and NE-SE trending folding, and then followed by N-S trending faulting and thrusting. Precambrian basement crops out at the hinge zone of the Mureungdam anticline. E-W trending Baekunsan and Mureungdam folds are affected by later NE-SW trending folds. N-S trending faults are characterised by dextral sense of strike slip fault and drag folds are developed along the eastern part of the faults. Geological structures related with thrust movements are hinterland dipping duplex along the contact boundaty between the Myobong and Pungchon Formation, antiformal stacks in the eastern part of the Mureung and Pungchon formations, antiformal stacks in the eastern part of the Mureung fault and back thrusts.
Batch flotation of quartz has been attempted for the feldspars sampled from near Buyeo. From the above experiments, the results obtained are as follows ; The zeta potential of quartz is relatively Insensitive when anions are being used, while feldspar is changed by addition of various ions. In particular, with HF ions it is markedly lower in zeta potential of feldspar at around pH 2, which results in the excellent flotation by amine. In the absence of HF, flotation by amine or the more selective diamine is, therefore, more sensitive to pH and collector concentration. In case of using Amine Hoe F 3638 with H₂SO₁, the recovery rate increases up to 90% with its grade of 95%, under the condition by using 800g/T of Amine Hoe F 3638 at pH 2.5∼3.0.
본 연구는 삼척지역 석회석의 부가가치 향상을 목적으로 수행되었다. 석회석의 부가가치 향상 방법에는 여러 가지가 있을수 있으나 본 연구에서는 중질탄산칼슘과 경질탄산칼슘의 제조에 역점을 두었다. 따라서 삼척지역 석회석을 중질탄산칼슘 또는 침강성 탄산칼슘 제조용 원료로 사용할 경우 발생되는 문제점들을 파악하고 그 해결방안을 제시하고자 하였다. 연구내용은 광물학적특성조사, 소성특성조사, 수화특성조사, 탄산화반응특성조사, 경탄제조특성조사, 중탄제조특성조사로 이루어진다. 광물학적특성조사에서는 현미경관찰, XRD분석, XRF분석, 산용해실험, 수선 등을 행하였고, 소성특성조사에서는 TG-DTA 분석, 온도 및 시간에 따른 소성율 변화를 조사하였다. 수화특성조사에서는 소성조건에 따른 수화반응속도와 습식사분에 의한 불순물제거율을 조사하였고, 경탄제조실험에서는 주로 방추형탄산칼슘과 교질탄산칼슘을 입방형탄산칼슘, 침상탄산칼슘을 제조하였고, 중질탄산칼슘제조 실험에서는 분쇄시간에 따를 입도변화, 입도에 따른 백색도 변화를 조사하였다. 얻어진 실험 결과들을 종합하면 아래와 같다. 본 연구에 사용된 석회석 시료를 중질탄산칼슘용으로 사용하고자 할 경우 백색도 향상을 위한 보다 많은 연구가 필요하며, 경질탄산칼슘용으로 사용하고자 할 경우는 800∼1000℃ 범위에서 소성→수화→습식 입도분급에 의한 탈철 →H₂O₂→(CH₃)₂CHCH₂CH₂OH-H₃PO₄+NH₂OH·HCI또는 알루민산염을 사용하는 표백 처리 →탄산화반응의 순서에 따라 경질탄산칼슘을 제조 하는 것이 적당할 것으로 생각 되며 이 때 생산되는 경질탄산 칼슘의 품질을 기존에 생산되는 국내산 경탄의 품질과 비교하면 DY39, DY48, DY50, DY58을 사용한 경우는 중품위 정도의 경탄을 얻을 수 있고, DY38, DY49, DY60을 사용하면 고품위의 겅탄을 제조 할 수 있을 것으로 사료된다. 그러나 외국산 경탄의 백색도(97∼99)에는 다소 떨어지는 경향이 있다.