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Liu C.,Chinese Academy of Geological Sciences | Fang L.,Chinese Academy of Geological Sciences | Zhang K.,China National Engineering Research Centerer for Utilization of Industrial Minerals | Guo Z.,Key laboratory for poly metallic ores utilization of Chinese Ministry of land and resources
International Journal of Earth Sciences and Engineering | Year: 2014

China was rich in bauxite resources, including a huge reserves of super poor bauxite located in Guangxi region. The Al-Si ratio was generally about 2, processing were very difficult. First, the authors took a physical beneficiation test to explore ways, through a series of positive flotation and reverse flotation condition test, they found the reverse flotation were better to improve alumina-silica ratio, aluminum-silicon ratio of 2# ore samples can be increase from 2 to 5.6. They also found ore Al-Si ratio had a great influence on the final concentrate Al-Si ratio, undressed ore Al-Si ratio had better achieving 2 by ore matching ways. And bauxite sintering dissolution tests showed that Al2O3 dissolution rate was high after the bauxite ingredients sintering, 1# sample and 2# sample dissolution rates were much higher than the flotation recoveries, and because aluminum silicon ratio of 2# sample was a little higher, the dissolution rate can reach 71.87%. The test results showed that positive flotation was not fit for poverty bauxite, reverse flotation process can obtain a certain effect, and the sintering aluminum process can fully recycle the useful minerals ©CAFET-INNOVA TECHNICAL SOCIETY


Lv Z.,Chinese Academy of Geological Sciences | Lv Z.,China National Engineering Research Centerer for Utilization of Industrial Minerals | Wei M.,Chinese Academy of Geological Sciences | Wei M.,China National Engineering Research Centerer for Utilization of Industrial Minerals | And 8 more authors.
International Journal of Mining Science and Technology | Year: 2012

A new process is proposed for refining niobite ore that is found in Jiangxi province of China. Niobite, also known as columbite or niobite-tantalite, is a mineral that contains tantalum and niobium. The separation process includes two-stage grinding, gravity concentration, magnetic separation, and flotation. The tantalum/niobium concentrate obtained had a grade of Ta 2O 5 18.28%, Nb 2O 5 41.62% at a recovery rate of Ta 2O 5 49.08%, Nb 2O 5 70.77%. Other minerals occurring along with the niobite, such as zinnwaldite, feldspar, and quartz, were also recovered to comprehensively utilize this ore. © 2012 Published by Elsevier B.V. on behalf of China University of Mining and Technology.


Ni W.-S.,Chinese Academy of Geological Sciences | Ni W.-S.,China National Engineering Research Centerer for Utilization of Industrial Minerals | Zhang H.-L.,Chinese Academy of Geological Sciences | Zhang H.-L.,China National Engineering Research Centerer for Utilization of Industrial Minerals | And 2 more authors.
Yejin Fenxi/Metallurgical Analysis | Year: 2015

The iron concentrate ore was dissolved with 8 mL of HCl and 2 mL of HF by microwave heating. The ferric irons were extracted with methyl isobutyl ketone in 6 mol/L HCl medium to eliminate the spectral interference of much iron on the determination of zirconium and hafnium. The Zr 339.198{99} nm and Hf 277.336{121} nm were selected as the analytical lines. The content of zirconium and hafnium in solution was determined by inductively coupled plasma atomic emission spectrometry (ICP-AES) under the selected instrumental parameters. The results showed that the atomic emission spectrum intensity of zirconium and hafnium exhibited good linearity to their contents (in the mass fraction of ZrO2 and HfO2) in range of 0-8.0 μg/mL. The correlation coefficients (r) of calibration curves were both 0.999 9.The detection limit of method was 0.025 and 0.024 μg/mL, respectively. The proposed method was applied to the analysis of actual sample of iron concentrate ore. The relative standard deviations (RSD, n=6) of determination results were 0.98%-2.7% and 1.5%-4.9%, respectively. The recoveries of standard addition were 94%-108% and 93%-110%, respectively. ©, 2015, Central Iron and Steel Research Institute. All right reserved.


Liu C.,Chinese Academy of Geological Sciences | Liu C.,China National Engineering Research Centerer for Utilization of Industrial Minerals | Hu Y.,Central South University | Feng A.,Chinese Academy of Geological Sciences | And 4 more authors.
Minerals Engineering | Year: 2011

The flotation behaviors of kaolinite and diaspore were investigated using N,N-dipropyl dodecyl amine (PN). Maximum recoveries of kaolinite and diaspore were about 90% and 50%, respectively. Both recoveries of kaolinite and diaspore increased with the increasing dosage of PN. On the basis of the zeta potential and FT-IR spectra, the ionization of surface hydroxyl and the isomorphic exchange of surface ions account for the charging mechanisms of surfaces of kaolinite and diaspore. The adsorption mechanism of PN on the surface of two minerals was mainly electrostatic. After reacting with PN, the zeta potential of kaolinite and diaspore both increased, and comparing with the original zeta potentials, potential of kaolinite increased much more than that of diaspore, this can explain why recovery of kaolinite is higher than that of diaspore. © 2010 Elsevier Inc. All rights reserved.


Zhang H.-L.,Chinese Academy of Geological Sciences | Zhang H.-L.,China National Engineering Research Centerer for Utilization of Industrial Minerals | Ni W.-S.,Chinese Academy of Geological Sciences | Ni W.-S.,China National Engineering Research Centerer for Utilization of Industrial Minerals | And 7 more authors.
Yejin Fenxi/Metallurgical Analysis | Year: 2016

The sample was decomposed with nitric acid-hydrochloric acid-perchloric acid. With 2.0 mL of 1.0 mg/mL arsenic solution as aggregation agent, 250 g/L stannous chloride solution was added drop by drop and sodium hypophosphite (solid) was added as reducing agent to reduce selenium, tellurium and arsenic in solution as simple substance for coprecipitation. Then, the precipitation after filtration was dissolved with nitric acid -perchloric acid. Consequently, a determination method of selenium and tellurium in gold concentrate was established by inductively coupled plasma atomic emission spectrometry (ICP-AES) with Se 196.090{171} nm and Te 214.281{157} nm as analytical lines. The experiments indicated that selenium and tellurium could be separated from most interference elements (such as silver, lead, zinc, silicon, calcium, magnesium, aluminum and iron) in sample by arsenic coprecipitation, avoiding the interference of matrix. Gold in gold concentrate would be also reduced and partially separated out. However, the interference test indicated that the interference of this part of gold which was simultaneously separated from matrix solution with selenium and tellurium could be ignored. Under the selected experimental condition, the mass concentration of selenium and tellurium in range of 0.5-2.0 μg/mL showed good linearity with its emission intensity. The linear correlation coefficient(r) of calibration curve for selenium and tellurium was 0.999 2 and 0.999 1, respectively. The detection limit of selenium and tellurium in this method was 1.40 and 4.23 μg/g, respectively. The content of selenium and tellurium in actual gold concentrate was determined according to the experimental method. The results were consistent with those obtained by spectrophotometry. The relative standard deviation(RSD, n=8) was 2.0%-2.4% and 3.1%-3.3%, respectively. © 2016, CISRI Boyuan Publishing Co., Ltd. All right reserved.


Mao X.-J.,Chinese Academy of Geological Sciences | Mao X.-J.,China National Engineering Research Centerer for Utilization of Industrial Minerals | Ni W.-S.,Chinese Academy of Geological Sciences | Ni W.-S.,China National Engineering Research Centerer for Utilization of Industrial Minerals | And 6 more authors.
Yejin Fenxi/Metallurgical Analysis | Year: 2016

The sample was dissolved at low temperature by diluted hydrochloric acid and filtrated for eliminating the impurities such as BaCO3, BaCl2, CaSO4 and other substances which were dissolved easily in HCl. The precipitate and filter paper was melted at high temperature with Na2CO3 followed by hot water leaching. The filtration was conducted again, and the precipitate was then dissolved with HNO3-HClO4. Then the content of Ba in sample solution was determined by inductively coupled plasma atomic emission spectrometry(ICP-AES) under optimal instrumental parameters with Ba 233.527{144} nm as analytical line. Thus, the content of BaSO4 in sample was indirectly calculated. Based on this, a determination method of barium sulfate in beneficiation process sample of barite (raw ore, tailing, middling and concentrate) was established by ICP-AES after Na2CO3 fusion. The results indicated that there was no obvious spectral interference by other elements at wavelength of Ba 233.527{144} nm. The mass concentration of Ba in range of 12-36 μg/mL showed good linearity to the corresponding emission intensity. The linear correlation coefficient of calibration curve was r=0.999 9. The detection limit of method for Ba was 0.14 μg/mL, which was equivalent to 0.24 μg/mL for BaSO4. The content of BaSO4 in the actual samples of raw ore, tailing, middling and concentrate in beneficiation process of barite was determined according to the experimental method. The results were consistent with those obtained by gravimetric method. The relative standard deviations (RSD, n=6) were between 0.39% and 4.1%. © 2016, CISRI Boyuan Publishing Co., Ltd. All right reserved.


Liu C.,Chinese Academy of Geological Sciences | Liu C.,China National Engineering Research Centerer for Utilization of Industrial Minerals | Ansheng F.,Chinese Academy of Geological Sciences | Ansheng F.,China National Engineering Research Centerer for Utilization of Industrial Minerals | And 4 more authors.
Mining Science and Technology | Year: 2011

The flotation of diaspore and kaolinite by one of a series of tertiary amines (DRN, DEN, DPN and DBN) was investigated. The tertiary amines show better floating recovery for kaolinite compared to diaspore. The maximum recovery D-value is 45% over a pH range from 3 to 8. FT-IR spectra confirm the presence of hydroxyl groups on the surface of kaolinite and diaspore. Zeta potential measurements show that the mineral surfaces are negatively charged over a wide pH range. Ionization of hydroxyl groups mainly accounts for the surface charging mechanism. The adsorption of tertiary amines onto the mineral surface is due mainly to electrostatic effects and the difference in electrostatic effect between a collector and the two minerals can explain the flotation separation. Inductive electronic and steric effects from the substituent groups result in different collecting powers for the four tertiary amines. © 2011, China University of Mining & Technology. All rights reserved.


Ni W.-S.,Chinese Academy of Geological Sciences | Ni W.-S.,China National Engineering Research Centerer for Utilization of Industrial Minerals | Liu Y.-L.,Chinese Academy of Geological Sciences | Liu Y.-L.,China National Engineering Research Centerer for Utilization of Industrial Minerals | And 2 more authors.
Yejin Fenxi/Metallurgical Analysis | Year: 2013

A novel method for indirect determination of chloride in chambersite by inductively coupled plasma atomic emission spectrometry (ICP-AES) was established. HNO3 was used to dissolve mineral samples and an extra amount of AgNO3 solution was added to the sample solution for the precipitation of AgCl. After the solution was transparent, remaining Ag in the solution was determined by inductively coupled plasma atomic emission spectrometry (ICP-AES) with spectral line of wavelength 328.068{102} nm as analysis line. By calculation, chloride in chambersite was indirectly determined. The experiment indicated the atomic emission strength of Ag had excellent linear relationship with ρ (Ag) in the range of 0-40 μg/mL. The method was used for determining chloride in chambersite, with recoveries of 98.8%-99.6% and RSD (n=6) of 0.11%-0.54%.


Ni W.-S.,Chinese Academy of Geological Sciences | Ni W.-S.,China National Engineering Research Centerer for Utilization of Industrial Minerals
Yejin Fenxi/Metallurgical Analysis | Year: 2013

The mineral samples were melted and decomposed by Na2O2. After being leached with 100 mL of hot triethanolamine (5+95), Fe, Al and Ti in mineral samples could be dissolved into the base solution to form complex with triethanolamine. And the coprecipitates of Mg(OH)2 and trace thorium were formed by adding 2 mL of MgCl2 (20 g/L)into the solution. After filtering, the coprecipitates were then dissolved with hot HCl(1+2), and the content of thorium in the solution was determined by inductively coupled plasma atomic emission spectrometry at 283.730{118}nm under the selected instrumental parameters. The pretreatment of sample was simple and fast; moreover, the spectrum interference of other elements on thorium was not significant at the wavelength of 283.730{118}nm. There was a good linear relationship between emission intensity of thorium and the mass concentration of Th in the solution in the range of 0-2 μg/mL. The correlation coefficient of calibration curve was 0.9999, and the detection limit of this method was 0.038 μg/mL. The content of thorium in CRMs was determined by this method and the results were consistent with the certified values, with the relative standard deviation (n=6) between 0.54%-3.9%.


Miao L.C.,Chinese Academy of Geological Sciences | Lin F.,China National Engineering Research Centerer for Utilization of Industrial Minerals
International Journal of Earth Sciences and Engineering | Year: 2014

An-Yi mine has a large reserve of titanium magnetite, and is of enormous industrial values. On the basis of technological mineralogy study on ores, titanium magnetite with a content of 23.5% is the major mineralogical components of samples. And magnetic iron phase comprises 61.47% in total iron phases. The rough and large dissemination size of titanium magnetite particles was propitious to beneficiation. The patent equipment of magnetic-screen separator was adopted in the tests to improve the quality of iron concentrate. The profit separating process and equipment beneficiating the titanium magnetite proved to be feasible in both bench and pilot scale tests. The pilot test concentrate were obtained with the TFe and TiO2 grade of 53.95% and 13.33%, and TFe and TiO2 recovery rate of 64.63% and 53.52%. Recovery of V2O5 in concentrate is 66.13%. Product examinations indicate that pilot concentrate has the very low contents of P, S and SiO2, and is suitable to the iron refinery to extract the Fe, Ti and V. © 2014 CAFET-INNOVA TECHNICAL SOCIETY.

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