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Controlling fine particles in flue gas from lead-zinc smelting by plasma technology

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Plasma Science and Technology 2020年第4期22卷 24-32页

作者： Tao ZHU Ruonan wang Xing ZHANG Yiwei HAN Wenfeng NIU Zeyu XUE Lifeng wang institute of Atmospheric Environmental Management and Pollution Control China University of Mining&Technology(Beijing)Beijing 100083People's Republic of China State Key Laboratory of Organic geochemistry Guangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhou 510640People's Republic of China Shaanxi Key Laboratory of Lacustrine Shale Gas Accumulation and Exploitation(under planning) Shaanxi Province 710065People's Republic of China

With the aim of controlling the problem of fine particles in the flue gas of lead-zinc smelting,a low-temperature plasma-electrocoagulation and electric bag composite dedusting experimental platform was designed by combining electrocoagulation and electric bag composite dust removal technology based on the research of low-temperature plasma ***,the properties of fine particles in flue gas from lead-zinc smelting were analyzed,and the effects of input voltage,filter wind speed,dust concentration,and pulse-jet ash-cleaning cycle on the dust collection efficiency of the integrated device were ***,the energy efficiency of the integrated technology was analyzed,and the control mechanism of the fine particles was *** experimental results show that the integrated technology of low-temperature plasma-electrocoagulation and electric bag composite dust removal achieves a fine particle removal efficiency of more than 99.99%and the energy consumption per unit mass of the dust is only 0.008 k W·h/*** integrated technology has broad application prospects and farreaching practical significance for the lead-zinc smelting industry to achieve ultra-low emission targets for flue gas and achieve energy-saving and emission reduction effects.

关键词： lead-zinc smelting smoke fine particles low-temperature plasma low-temperature plasma-electrocoagulation and electric bag compound dust removal integrated technology

Mantle Redox State Evolution in Eastern china and Its Implications

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Acta Geologica Sinica(English Edition) 2002年第2期76卷 238-248页

作者： LI Jianping (李建平) wang Jian(王建) guangzhou institute of{2. Chinese Academy of Sciences Guangzhou 510640 Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou 510640

Using the secondary spinel standard, the authors have precisely measured theFe^(3+)/SIGMA Fe values of spinels in mantle xenoliths from Cenozoic basalts in eastern china, andestimated the oxygen fugacities recorded by 63 mantle xenoliths through olivine-orthopyroxene-spineloxygen barometry. The results indicate that the oxygen fugacities of the lithospheric mantle ineastern china are higher in the south than in the north. Among them, the oxygen fugacity of theNorth china craton lithospheric mantle is the lowest, similar to that of the oceanic mantle, whilethat of Northeast and South china are the same as that of the global continental mantle. Thevariations of mantle redox state in eastern china are mainly controlled by the C-O-H fluids derivedfrom the asthenospheric mantle. According to the mantle oxidation state, it can be concluded thatthe C-O-H fluids in the lithospheric mantle of eastern china consist mainly of CO_2.and minor H_2.,but CH_4-rich fluids should come from the asthenosphere where the oxidation state is lower.

关键词： mantle xenoliths from eastern china lithospheric mantle asthenosphericmantle redox state mantle C-O-H fluids

geochemistry and geodynamic significance of the rare-earth mineralized Paleoproterozoic Longwangzhuang granite on the southern margin of the North{2. Craton

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Chinese Journal Of geochemistry 2011年第2期30卷 270-279页

作者： Bao, Zhiwei wang, Qiang Du, Fengjun Key Laboratory for Metallogenic Dynamics Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou 510640 China Key Laboratory of Isotope Geochronology Geochemistry Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou 510640 China Henan institute of Geological Survey Zhenzhou 450007 China

The Longwangzhuang granite pluton occurs on the southern margin of the North china Craton and consists mainly of biotite syenogranite with aegirine granite being locally *** granites are characterized by high silicon and alkaline contents(SiO2.72.17%-76.82.,K2.+Na2.=8.2.%-10.2.%,K2./Na2.>>1),AI(agpaitic index) =0.84-0.95,DI=95-97,ASI(aluminum saturation index)=0.96-1.13,and very high Fe* number(FeO*/(FeO*+Mg)=0.90-0.99),thus the granites are assigned to the metaluminous to weakly peraluminous,alkalic to calc-alkalic ferroan A-type *** granites are rich in large ion lithophile elements(LILE),especially high in REE concentrations(REE+Y=854×10-6-1572.10-6);whereas the enrichment of high strength field elements(Nb,Ta,Zr,Hf) is obviously less than that of LILEs,exhibiting mild depletions on trace element spider plots;and the rocks are significantly depleted in Ba,Sr,Ti,and *** low εNd(t) values(-4.5--7.2. and high model ages(2.3-2.5 Ga) of the granites as well as the low εHf(t) values(-1.11--5.2.) and high Hf model ages(THf1= 2.1-2.3 Ga,THf2.2.4-2.6 Ga) of zircons from the biotite syenogranite suggest that the granites were probably derived from an enriched mantle *** zircons from the biotite syenogranite are mainly colorless transparent crystals exhibiting well-developed oscillatory zoning on the cathodoluminescence images with a LA-ICPMS zircon U-Pb age of 1602.1±6.6 Ma(MSWD=0.48).Petrochemical,trace elements,as well as Nd and Hf isotopic compositions of the rocks demonstrate that the granites were formed in a within-plate extensional tectonic regime possibly related to the breakup of the Columbia *** granites were most likely formed through extreme fractional crystallization of alkali basaltic magma resulted from partial melting of the mantle,which was fertilized by recycling crustal rocks triggered by the delamination of lithospheric mantle and lower crust following the ～1.8 Ga collision and amalgamation of the North Chin

关键词： syenogranite rare earth isotope geochemistry Proterozoic Columbia supercontinent

Electrical Characterization in the Phase Transition between Cubic PbCrO_(3) Perovskites at High Pressures

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Chinese Physics Letters 2013年第11期30卷 160-163页

作者： wang Wen-Dan HE Duan-Wei XIAO Wan-Sheng wang Shan-Min XU Ji-An institute of Atomic and Molecular Physics Sichuan UniversityChengdu 610065 guangzhou institute of{2. Chinese Academy of SciencesGuangzhou 510640 institute of Fluid Physics and National Key Laboratory of Shockwave and Detonation Physics China Academy of Engineering PhysicsMianyang 621900

By in situ x-ray diffraction,an isostructural phase transition between two kinds of the cubic PbCrO_(3) perovskites at around 1.6 GPa and room temperature with a 9.8%volume change is ***,we have synthesized this cubic PbCrO_(3)perovskite *** we report our high-pressure in situ electrical resistance measurements up to 4.1 GPa for this perovskite *** room temperature,the resistance shows special changes at 1.2.and 2.7 *** may indicate the starting and ending points of this *** 4.1 GPa,the negative temperature resistance coefficient is observed,which means that phase Ⅱ could be considered as a semiconductor according to our present measurement.

关键词： resistance perovskite cubic

Cloudiness regime shift during 1946—1992.recorded by coral in the South china Sea

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Acta Oceanologica Sinica 2005年第5期24卷 27-34页

作者： GAO Rongzhen SUN Donghuai wang Dongxlao YANG Xiaoyi Key Laboratory of Tropical Marine Environmental Dynamics South China Sea Institute of Oceanology Chinese Academy of Sciences Guangzhou 510301 China Laboratory of Marginal Sea Geology South China Sea Institute of Oceanology ＆ Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou 510301 China Qingdao Meteorological Administration Qingdao 266003 China

By extracting and comparing long-term trend components of coral gray value, sea surface temperature, cloudiness, and net heat flux for the period of 1946-1992. the relationships among them are addressed. There exists a prominent regime shift in the cloudiness associated with the corresponding variabilities of sea surface temperature and net heat flux occurred in the mid-1960s, which can be successfully recorded by coral gray value, a climatic proxy. Long-term cloudiness variations in the South china Sea are completely opposite to the equatorial western Pacific in the past five decades, whereas they share a similar trend to that over Asian monsoon prevailing waters. The fact that the coral gray value is highly correlated to cloudiness provides a unique perspective on utilizing this coral to study cloudiness variations in the pre-instrumental period.

关键词： coral gray value cloudiness regime shift South china Sea

A Review of Research Progress in the Genesis of Colloform Pyrite and Its Environmental Indications

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Acta Geologica Sinica(English Edition) 2016年第4期90卷 1353-1369页

作者： GAO Shang HUANG Fei wang Yinghui GAO Wenyuan Key Laboratory of Ministry of Education on Safe Mining of Deep Metal Mines College of Resource and Civil Engineering Northeastern University

Colloform pyrite is a special form of nano-micro polycrystalline aggregation growth, for which a suitable term is ＂aggregates of nano-micro crystals＂. This kind of colloform texture is observed in various geological bodies, such as ancient sedimentary rocks, modern marine and lake sediments, various types of ore deposits, and modern seafloor hydrothermal vents. This paper summarizes the latest developments and research into the definition, formation mechanisms, and environmental indications of colloform pyrite. There appears to be three main formation mechanisms of colloform pyrite： pseudomorphic replacement; biogenic precipitation; and inorganic precipitation. The morphology, particle size, trace element content and preferential growth orientations of coUoform pyrite microcrystals can be important indicators for sedimentary environments, hydrothermal activity, and ore-forming processes. We suggest that the microscopic features of nano-micro crystals in colloform pyrite and their aggregation growth patterns need further investigation. The relationships between formation mechanisms of colioform pyrite, organic activity and depositional environments require further exploration. To reveal the nature of nano-micro grain aggregation growth in colloform pyrite and analyse its growth environment and evolutionary history, it is supposed to apply nanoscientific and nanotechnological methods, further integrate consideration of macroscopic geological backgrounds and microscopic mineral growth phenomena, combine high-resolution imaging systems and in situ quantitative microanalysis methods and constitute a mergence of earth science, thermodynamics and kinetics, life science, material science, and chemistry in the study.

关键词： colloform pyrite nano-micro crystals aggregation growth mechanism environmental indication nanoscience and nanotechnology

Zircon U-Pb Geochronology of the Cenozoic Granitic Mylonite along the Ailaoshan-Red River Shear Zone:New Constraints on the Timing of the Sinistral Shearing

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Journal of Earth Science 2016年第3期27卷 435-443页

作者： Xiaofei Guo Yuejun wang Huichuan Liu Jianwei Zi State Key Laboratory of Isotope geochemistry Guangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhou 510640China University of Chinese Academy of Sciences Beijing 100049China School of Earth Science and Geological Engineering Sun Yat-sen UniversityGuangzhou 510275China CAS Center for Excellence in Tibetan Plateau Earth Sciences Beijing 100101China School of Earth and Environment University of Western AustraliaCrawley 510275Western Australia

The Ailaoshan-Red River（ASRR） shear zone in SW china represents an important discontinuity believed to have accommodated eastward extrusion of the Tibetan Plateau in response to the collision of the Indian and Eurasian plates. The onset timing and duration of the ASRR sinistral strike-slip shearing have been hotly disputed. In this paper we present new zircon LA-ICP-MS U-Pb geochronological data from six syntectonic granitic mylonite and leucosomes samples from the ASRR shear zone. Our data reveal a metamorphic age of ~40 Ma, most likely suggesting the maximum age of the shearing initiation. Rocks showing syn-kinematic signatures yield crystallization ages of 38–2. Ma, with inherited components ranging from 716 to 108 Ma. These results, together with existing geological and geochronological data, indicate that the sinistral shearing along the ASRR zone probably began at 40 Ma, mainly activated at 2.–2. Ma and lasted at least to ~2. Ma. Our data suggest a continuous extrusion between the Indochina and South china blocks during ~35–17 Ma. The ASRR sinistral shearing has accommodated large scale eastward displacement of the southeastern Tibetan syntaxis, and is likely responsible for the opening of the South china Sea.

关键词： Ailaoshan-Red River zircon U-Pb dating mylonite and migmatite sinistral shearing eastward extrusion

Characteristics and mechanism of low permeability beach-bar sandstone reservoir of Es4 in Dongying sag

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Mining Science and Technology 2009年第6期19卷 788-795页

作者： wang Hua-ai ZHONG Jian-hua ZHONG Fu-ping NIU Yong-bin wang Pei-jun College of Geo-Resources and Information China University of Petroleum Dongying Shandong 257061 China Sinopec International Petroleum Exploration and Production Corporation Beo＇ing 100083 China guangzhou institute of{2. Chinese Academy of Sciences Guangzhou Guangdong 510640 China

Core and cast sections observation and description,and logging,scanning electron microscope and core lab analysis data etc. were applied to the present research of the characteristics and mechanism of low permeability beach-bar sandstone reservoir of Es4 in Dongying sag. The results indicated the reservoir has the characteristics of middle-low pores,low-permeability,low compositional and structural maturity,and thin throat. The low-permeability is mainly due to sedimentation (fine particles and argillaceous inter beds) and diagenesis (compaction,cementation,and dissolution). The cementation reduced the physical property of the reservoir mainly by carbonate cementation,quartz autogeny and enragement,and autogeny clay. Clay minerals usually jam the pores by filling holes,close-fitting the wall of hole,bridging,wrapping grains,and separate attaching the pores and so on. The dissolution is insufficient so as not to improve the porosity and permeability of the reservoir obviously. So it is also an important factor of forming low-permeability reservoir.

关键词： beach-bar sandstone low-permeability reservoir characteristics sedimentation diagenesis

The Enormous Potential of Gas Generation from Carboxylic Acid Salts

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Acta Geologica Sinica(English Edition) 2021年第4期95卷 1429-1430页

作者： wang Qingtao LIU Wenhui LI Yining LIU Jinzhong State Key Laboratory of Continental Dynamics Department of GeologyNorthwest UniversityXi'an 710069China State Key Laboratory of Organic geochemistry Guangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhou 510640China

Objective Up to 45% of total organic carbon(TOC) was probably lost during acid treatment in carbonate-rich rocks(Froelich, 1980). Some scientists thought these acidsoluble organic matters were largely contributed from carboxylic acid salts, which were commonly developed in alkaline carbonate formations and could potentially be excellent sources for natural gas stored in Early Paleozoic carbonate rocks in the Ordos Basin(Chong and McKay, 1984;Liu et al., 2.17).

关键词： alkaline salts carbonate