EFFECTS OF DISSOLVED MINERAL SPECIES ON THESURFACECHEMICALCHARACTERISTIC，ELECTROKINETICPROPERTYANDFLOTATIO

ＥＦＦＥＣＴＳＯＦＤＩＳＳＯＬＶＥＤＭＩＮＥＲＡＬＳＰＥＣＩＥＳＯＮＴＨＥＳＵＲＦＡＣＥＣＨＥＭＩＣＡＬＣＨＡＲＡＣＴＥＲＩＳＴＩＣ，ＥＬＥＣＴＲＯＫＩＮＥＴＩＣＰＲＯＰＥＲＴＹＡＮＤＦＬＯＴＡＴＩＯＮＢＥＨＡＶＩＯＲＯＦＦＬＵＯＲＩＴＥＡＮＤＳＣＨ...     

THE DIFFERENTIAL DYNAMIC MODEL OF ENTERPRISE ECONOMIC DEVELOPMENTANDITSCOMPUTATIONALMETHODS

ＴＨＥＤＩＦＦＥＲＥＮＴＩＡＬＤＹＮＡＭＩＣＭＯＤＥＬＯＦＥＮＴＥＲＰＲＩＳＥＥＣＯＮＯＭＩＣＤＥＶＥＬＯＰＭＥＮＴＡＮＤＩＴＳＣＯＭＰＵＴＡＴＩＯＮＡＬＭＥＴＨＯＤＳＴＨＥＤＩＦＦＥＲＥＮＴＩＡＬＤＹＮＡＭＩＣＭＯＤＥＬＯＦＥＮＴＥＲＰＲＩＳＥＥＣ...     

SODA DECOMPOSITION OF LOW－GRADE TUNGSTEN ORE THROUGH MECHANICAL ACTIVATION

ＳＯＤＡＤＥＣＯＭＰＯＳＩＴＩＯＮＯＦＬＯＷ－ＧＲＡＤＥＴＵＮＧＳＴＥＮＯＲＥＴＨＲＯＵＧＨＭＥＣＨＡＮＩＣＡＬＡＣＴＩＶＡＴＩＯＮＺｈａｏＺｈｏｎｇｗｅｉＬｉＨｏｎｇｇｕｉＬｉｕＭａｏｓｈｅｎｇＳｕｎＰｅｉｍｅｉＬｉＹｕｎｊｉａｏ（Ｄｅｐａｒｔｍ...     

METALLOGENICCHARACTERISTICSANDORE－P

ＭＥＴＡＬＬＯＧＥＮＩＣＣＨＡＲＡＣＴＥＲＩＳＴＩＣＳＡＮＤＯＲＥ－ＰＲＯＳＰＥＣＴＩＮＧＦＵＴＵＲＥＯＦＰＲＥ－ＣＡＭＢＲＩＡＮＧＯＬＤＤＥＰＯＳＩＴＳＩＮＭＵＦＵ－ＪＩＵＬＩＮＧＤＩＳＴＲＩＣＴＷｕＹａｎｚｈｉ（ＤｅｐａｒｔｍｅｎｔｏｆＧｅｏｌｏ...     

ISOTHERMAL KINETICS OF THE FIRST STAGE REDUCTION OF MAGNETITE COLD BOND PELLETS WITH CARBON MONOXIDE

ＩＳＯＴＨＥＲＭＡＬＫＩＮＥＴＩＣＳＯＦＴＨＥＦＩＲＳＴＳＴＡＧＥＲＥＤＵＣＴＩＯＮＯＦＭＡＧＮＥＴＩＴＥＣＯＬＤＢＯＮＤＰＥＬＬＥＴＳＷＩＴＨＣＡＲＢＯＮＭＯＮＯＸＩＤＥ＊ＣｈｅｎＱｉｙｕａｎＺｈｏｕＨｏｎｇＺｈａｎｇＰｉｎｇｍｉｎ（Ｄｅｐａｒｔｍ...     

QUANTUM CHEMICAL STUDY ON THE REACTION OF PYRITE WITH NITRIC ACID~

ＱＵＡＮＴＵＭＣＨＥＭＩＣＡＬＳＴＵＤＹＯＮＴＨＥＲＥＡＣＴＩＯＮＯＦＰＹＲＩＴＥＷＩＴＨＮＩＴＲＩＣＡＣＩＤ~＋￥ＹａｎｇＴｉａｎｚｕ；ＺｈａｏＴｉａｎｃｏｎｇ；ＬｕＹｉｙｕａｎ（ＤｅｐａｒｔｍｅｎｔｏｆＮｏｎｆｅｒｒｏｕｓＭｅｔａｌｌｕｒｇｙ，Ｃ?..     

SINGLE CRYSTAL GROWTH OF Cu BASED SHAPE MEMORYALLOYANDITSTHERMODYNAMICANALYSIS

ＳＩＮＧＬＥＣＲＹＳＴＡＬＧＲＯＷＴＨＯＦＣｕＢＡＳＥＤＳＨＡＰＥＭＥＭＯＲＹＡＬＬＯＹＡＮＤＩＴＳＴＨＥＲＭＯＤＹＮＡＭＩＣＡＮＡＬＹＳＩＳＳＩＮＧＬＥＣＲＹＳＴＡＬＧＲＯＷＴＨＯＦＣｕＢＡＳＥＤＳＨＡＰＥＭＥＭＯＲＹＡＬＬＯＹＡＮＤＩＴＳＴＨＥＲ...     

ABSTRACT FORM JOURNAL OF CENTRAL SOUTH UNIVERSITY OF TECHNOLOGY （CHINESE EDITION）

ＡＢＳＴＲＡＣＴＦＯＲＭＪＯＵＲＮＡＬＯＦＣＥＮＴＲＡＬＳＯＵＴＨＵＮＩＶＥＲＳＩＴＹＯＦＴＥＣＨＮＯＬＯＧＹ（ＣＨＩＮＥＳＥ　ＥＤＩＴＩＯＮ）１ＤＥＶＥＬＯＰＭＥＮＴＯＦＥＸＰＥＲＴＳＹＳＴＥＭＦＯＲＰＲＥＤＩＣＴＩＮＧＯＲＥＢＥＮＥＦＩＣＩＡＢＩ...     

THE PULP ELECTROCHEMISTRY OF FLOTATION SEPARATION FOR STIBNITE-ARSENOPYRITE BULK CONCENTRATE

ＴＨＥＰＵＬＰＥＬＥＣＴＲＯＣＨＥＭＩＳＴＲＹＯＦＦＬＯＴＡＴＩＯＮＳＥＰＡＲＡＴＩＯＮＦＯＲＳＴＩＢＮＩＴＥ－ＡＲＳＥＮＯＰＹＲＩＴＥＢＵＬＫＣＯＮＣＥＮＴＲＡＴＥＯｕＬｅｍｉｎｇＦｅｎｇＱｉｍｉｎｇＣｈｅｎＪｉｎ（ＤｅｐａｒｔｍｅｎｔｏｆＭｉｎｅ...     

STUDIES ON MECHANICS PROBLEM OF DYNAMIC WALKING OF ANTHROPOMORPHIC BIPED ROBOTS

ＳＴＵＤＩＥＳＯＮＭＥＣＨＡＮＩＣＳＰＲＯＢＬＥＭＯＦＤＹＮＡＭＩＣＷＡＬＫＩＮＧＯＦＡＮＴＨＲＯＰＯＭＯＲＰＨＩＣＢＩＰＥＤＲＯＢＯＴＳＴａｎＧｕａｎｚｈｅｎｇ；ＹａｎｇＨｏｎｇｚｈｉ（ＲｏｂｏｔｔｅｓＲｅｓｅａｒｃｈＣｅｎｔｒｅ，ＣｅｎｔｒａｌＳ...     

Dual-frequency and multi-parameter IP instrument and its application research

Variable IP method mainly measures the Percent Frequency Effect (PFE), and phase IP method mainly measures phase. They both aim at finding IP anomaly. However, only using PFE anomaly or single phase anomaly can’t distinguish IP body’s property. The authors put forward a new method—dual-frequency and multi-parameter IP method, which can not only find anomaly of PFE and phase, but also provide the property information of IP anomaly resource. The authors also have invented the dual-frequency and multi-parameter IP instrument. A lot of experiments and field work have been done. The results show that the instrument is valuable in distinguishing IP anomalies. Synopsis of the first author Bao Guangshu, professor, born in Oct. 1936. Research areas are: theory and survey system of geoelectrical field. Main awards are: Invention Prize of the National Scientific and Technological Committee of China (3nd class) (1985); National Scientific and Technological Achievement Prize of China (2nd class) (1995); has received more than 10 Scientific and Technological Achievement Prizes of Province and Department; has published more than 30 scientific papers and 2 books.     

Decomposing scheelite and scheelite-wolframite mixed concentrate by caustic soda digestion

1　INTRODUCTIONWiththecontinualexploitationanddevelopmentoftungstenmaterials ,wolframitebecomeslessandless .Statisticaldatashowthattheproportionofwol framiteisonly32 .9%andthatofscheeliteis 4 5 .5 %intungstenresources ,therestisscheelite wolframitemixedconcentrateandmostofnewlyexploredtung stenisscheelite[1] .Therefore ,howtoeconomicallyexploitscheelitebecomessignificantlyimportantindevelopingtungstenindustriesinChina .Currently ,causticleachingisappliedtohandlewolframiteconcentrate ,andh…     

Direct and Simultaneous Determination of Several Impurity Elements in Manganese Tetroxide using ICP-AES

1 IntroductionManganic mine resource is Chinese particular re-source,only fewcountries have manganic mine resourceinthe world. Manganese tetroxide whichis made of puremanganese is an important high-tech product that hasbeenregarded as a kind of combat readiness material inseveral countries[1 ,2]. Manganese tetroxide with a highpure and high specific surface area has been ranked inproject of high tech industrialization with preferential de-velopment andsupportinspecial purpose electron material…     

Determination of Trace Selenium in Electrolytic Manganese by Graphite Furnace Atomic Absorption Spectrometry

1　IntroductionBecauseofitsadvantagesofhigh purity ,electrolyticmanganeseismainlyusedinproducingspecialsteel,nonferrousmetalsalloyandasthecrudematerialforpro ducinghighlypuremanganesecarborate ,mangano mana ganicoxide ,electricweldingrodcoatingandartificialdi amondaccelerant.Electrolyticmanganese ,oneofthemostimportantproductsinXiangxiautonomousregion ,isthemainexportproduct.However,thecontentofimpuri tyinelectrolyticmanganeseofXiangxiismuchhigher,whichgreatlyimpairsthequalityoftheproduct .Fo…     

On-line Preconcentration of Trace Nickel from Electrolytic Manganese Using Minicolumn Packed Activated Carbon for Electrothermal Atomic Absorption Spectrometry

1　IntroductionElectrolyticmanganeseisanimportantmetallurgicalproductthathasbeenregardedasakindofcombatreadi nessmaterialinseveralcountries[1] .Itisamainindustri alexportproductofXiangxiAutonomousRegionofChina .However,theimpuritycontentintheelectrolyticm…     

白钨矿物相组成对浸出率的影响

针对白钨精矿苛性钠浸出率进行了研究。通过对2种典型白钨精矿(A,B矿)进行高温高压碱性浸出试验,探讨了白钨精矿的浸出率不稳定的原因。由A,B矿的SEM,XRD,XRF分析结果得知,二者的矿相结构基本相同但元素组成不同。B矿中含有黄铁矿其矿石表面油脂光滑,而A矿不含有黄铁矿其矿石表面呈疏松状。在试验条件相同的情况下,A,B矿的浸出率分别为98.4%和66.4%。对钨渣进行SEM,XRD分析,得知A矿中白钨矿反应完全,B矿中的白钨矿未反应完全,仍以原形态存在于渣中。研究结果表明:因为黄铁矿的存在,造成了矿石表面油脂光滑,使得碱液不易进入白钨矿石内部,不利于矿物的浸出。     

STUDY ON TREATMENT OF AMMONIA LEACHING SLAG IN THE METALLURGICAL PROCESS OF TUNGSTEN

ＳＴＵＤＹＯＮＴＲＥＡＴＭＥＮＴＯＦＡＭＭＯＮＩＡＬＥＡＣＨＩＮＧＳＬＡＧＩＮＴＨＥＭＥＴＡＬＬＵＲＧＩＣＡＬＰＲＯＣＥＳＳＯＦＴＵＮＧＳＴＥＮＳｕｎＰｅｉｍｅｎ；ＬｉＨｏｎｇｇｕｉ；ＬｉＹｕｎｊｉａｏ；ＬｉｕＭａｏｓｈｅｎｇ；ＳｕＰｅｎｇｔｕａｎ（...     

应用组合药剂常温浮选云南某白钨矿的研究

云南某矽卡岩型白钨矿WO3品位0.43％,含硫0.26％,含磷0.2％.试验采用预先脱硫脱碳—常温浮选白钨矿的工艺流程,用Na2CO3作调整剂,Na2SiO3作抑制剂,731与油酸组合用药,在磨矿细度为-0.074mm 65％时,取得白钨精矿品位67.82％、回收率88.87％的较好试验指标.     

A new technology for production of high purity paratungstate ammonium from low grade tungsten concentrate

A new technological process for production of paratungstate ammonium from low grade tungsten concentrate with a high content of calcium and impurities has been studied. The experiments show that average tungsten leaching efficiency of more than 96.92% can be obtained with a low NaOH consumption by using the mechanical activating caustic decomposition, and the content of main impurities (P, As, Si) in Na₂WO₄ solution obtained is competitive with that from standard wolframite concentrate by traditional caustic decomposition. After recovering caustic soda by crystallization, impure Na₂WO₄ solution is changed to (NH₄)₂WO₄ solution by ion exchange method. Molybdenum may be removed from (NH₄)₂WO₄ solution by new ion exchange method. Finally, paratungstate ammonium of high purity is obtained. This technology has the advantages of short technological process, high recovery of tungsten, high economic and social benifits. Synopsis of the first author Sun Peimei, professor, born in 1945, specializing in rare metallurgy and hydrometallurgy.     

Disruption of bacterial cells by photocatalysis of montmorillonite supported titanium dioxide

The photo-induced antibacterial capacity of montmorillonite supported titanium dioxide (TiO₂/Mmt for short) was evaluated by using Escherichia coli and Staphylococcus aureus as modal organisms. The bactericidal activity of TiO₂/Mmt was examined by cell viability assay under different illumination modes. Atomic force microscopy (AFM) and total organic carbon/Total nitrogen (TOC/TN) analyses were employed to investigate the mechanism of the photocatalytic bactericidal process qualitatively and quantitatively. The kinetic data show that TiO₂/Mmt has excellent antibacterial performance, and about 99% of both bacteria cells are inactivated within 75 min illumination. The AFM images demonstrate that the bacterial cells are irreversibly decomposed and some cell components are dissolved. Therefore, the content and phase of carbon and nitrogen in the solution are changed after photocatalytic reaction. Funded by the National “973” Program of MOST of China (No. 2004CB619204), and the Scientific and Technological Research Key Project, Ministry of Education of China (No. 02052), the National High Tech. “863” Program of China (No. 2007AA06Z100), and the Scientific and Technological Research Key Project (No. 2007AA06Z123 )