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Coal gangue separation system based on density measurement

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Coal gangue separation system based on density measurement

Adsorption of surfactants onto acrylic ester resins with different pore size distribution

2012 IEEE International Conference on Computer Science and Automation engineering（CSAE 2012）

作者： Chen Zhang school of chemical and environmental engineering china university of mining and technology beijing,china Chenglian Zhang school of chemical and environmental engineering china university of mining and technology beijing,china

Coal gangue separation is an essential part of the development and utilization of coal.A method of separating gangue from coal based on the density by calculating volume and weight of the ores which is measured by the designed equipment was given in this *** working principle of the separation method was described firstly,then the system composition of the separation system was introduced,further more,the main influence factors of the separation accuracy were analyzed.

关键词： coal coal gangue separation system

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Science china Chemistry 2006年第5期49卷 445-453页

作者： YANG Weiben1,2,3,LI Aimin1,3,CAI Jianguo1,3,MENG Guanhua1,3 & ZHANG Quanxing1,3 1. State Key Laboratory of Pollution Control and Resource Reuse,school of the environment,Nanjing university,Nanjing 210093,china 2. Nanjing College of chemical technology,Nanjing 210048,china 3. Jiangsu engineering & technology Research Center for Organic Toxicant Control and Resource Reuse,Nanjing 210038,china 1. State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing 210093 China 2. Nanjing College of chemical technology Nanjing 210048 China 3. Jiangsu engineering & technology Research Center for Organic Toxicant Control and Resource Reuse Nanjing 210038 China

In this study, a series of acrylic ester resins with different pore size distribution were prepared successfully by varying the type and the amount of pore-forming agents. In order to inves-tigate the adsorption behavior and mechanism of surfactants on acrylic ester resins, three kinds of surfactants were utilized as adsorbates that were sodium 6-dodecyl benzenesulfonate (6-NaDBS), sodium 1-dodecyl benzene sulfonate (1-NaDBS) and sodium 1-dodecyl sulfonate, respectively. It was observed that the surface area was available in a particular pore size and an appropriate pore size of resins appeared to be more important for the adsorption of surfactants. As compared to commercial acrylic ester resins XAD-7 and HP2MG, 50# and 38# resins exhibited more excellent adsorption properties toward 1-NaDBS and 6-NaDBS. The experimental equilibrium data were fitted to the Langmuir, and double-Langmuir models. Two models provided very good fittings for all resins over the temperature range studied. The investigation indicated that electrostatic attraction and hydrogen bond between resins and surfactants were the main forces and had an obvious effect on adsorption proc-ess.

关键词： acrylic ester resin, surfactant, adsorption, pore size distribution, isotherm.

Characterzation and separation of Al_(13) species using gel-filtration chromatography

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Science china Chemistry 2006年第4期49卷 326-331页

作者： CHU Yongbao1,2, GAO Baoyu1, YUE Qinyan1, WANG Yan1 & WANG Shuguang1 1. school of environmental Science and engineering, Shandong university, Jinan 250100, china 2. College of Material and environment, Qingdao university of Science and technology, Qingdao 266042, china school of environmental Science and engineering Shandong University Jinan China College of Material and environment Qingdao University of Science and Technology Qingdao China

A polyaluminum chloride (PAC) sample was prepared using a slow alkalinetitration method. The Bio-Gel P-100 gel column chromatographic technique was used to separate andcharacterize the various forms of aluminum present in the prepared PAC solution. The effluents froma gel column were monitored using online chemical method: AI-Ferron timed complexationspectropho-tometry and by ^(27)Al nuclear magnetic resonance (NMR) spectroscopy. Effects ofdifferent experimental conditions such as eluent flow rate, ionic strength and pH on separation ofAl_(13) were investigated. Experimental results indicated that molecule size exclusion was not theonly parameter affecting the column chromatographic separation efficiency of Al_(13) but moleculecharge as well. Reducing the eluent flow rate, increasing the ionic strength and suitable pHresulted in increase in the separation efficiency. Experimental results clearly indicated that byvarying the experimental conditions, it is possible to produce pure Al_(13) species using a gelcolumn chromatographic technique.

关键词： Al13 species, column chromatography, polyaluminum chloride (PAC), separation and purification.

Corrosion science general-purpose data model and interface (I): Meanings and issues of design and implementation

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Science china(Technological Sciences) 2008年第9期51卷 1394-1401页

作者： TANG ZiLong school of Materials Science and engineering, Tianjin university, Tianjin 300072, china 1. school of Materials Science and engineering Tianjin University Tianjin 300072 China

A brand new design of integrated corrosion information system is introduced to meet the constantly increasing demands of material corrosion information. Two concepts, "general-purpose corrosion data model" and "public corrosion data ex-changing interface", are suggested to integrate a wide variety of corrosion data sources based on detailed analysis on characteristics of each source in order to promote the information sharing and data mining. The architecture of integrated corrosion information environment is blueprinted. The insight analysis is focused on 1) architecture of the system; 2) data flow and information sharing; 3) roles of system players and their interactions; 4) approaches to data integration. Several key issues are addressed in detail including coverage of data model, data source integration and mitigation, and data granularity from system performance and model acceptance points of view. At the end, the design and implementation ap-proach of general corrosion data model is presented based on cutting edge IT techniques.

关键词： corrosion multi-source data modeling integrated information system

Geochemical characteristics of pyrolysis gas from epimetamorphic rocks in the northern basement of Songliao Basin,Northeast china

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Science china Earth Sciences 2008年第S1期51卷 140-147页

作者： YANG Chun 1 ,LUO Xia 2 ,LI Jian 2 ,LI ZhiSheng 2 ,LIU QuanYou 3 &Wang YuLin 4 1 Department of Earth Sciences,Zhejiang university,Hangzhou 310027,china 2 Research Institute of Petroleum Exploration and Development(Langfang Branch),Langfang 065007,china 3 Research Institute of Petroleum Exploration and Development,beijing 100083.china 4 Department of Source and environment,Liaoning Technical university,Fuxin 123000,china Zhejiang Univ Dept Earth Sci Hangzhou 310027 Peoples R China Res Inst Petr Explorat & Dev Langfang Branch Langfang 065007 Peoples R China Res Inst Petr Explorat & Dev Beijing 100083 Peoples R China Liaoning Tech Univ Dept Source & Environm Fuxing 123000 Peoples R China

The Xushen gas field,located in the north of Songliao Basin,is a potential giant gas area for china in the *** proved reserves have exceeded 1000×10 8 m 3 by the end of ***,the origin of natural gases from the deep strata is still in *** rocks as a potential gas source are widely spreading in the northern basement of Songliao *** to pyrolysis experiments for these rocks in the semi-confined system,gas production and geochemistry of alkane gases are discussed in this *** Carboniferous-Permian epimetamorphic rocks were heated from 300℃to 550℃,with temperature interval of 50℃.The gas production was quantified and measured for chemical and carbon isotopic *** show thatδ13C 1 is less than?20‰,carbon isotope trend of alkane gas isδ13C 1 2 2 >δ13C 3 ,these features suggest that the gas would be coal-type gas at high-over maturity,not be inorganic gas with reversal trend of gaseous alkanes (δ13C 1 >δ13C 2 >δ13C 3 ).These characteristics of carbon isotopes are similar with the natural gas from the basin basement,but disagree with gas from the Xingcheng ***,the mixing gases from the pyrolysis gas with coal-typed gases at high-over maturity or oil-typed gases do not cause the reversal trend of carbon *** gas generation intensity for epimetamorphic rocks is 3.0×10 8 ―23.8×10 8 m 3 /km 2 ,corresponding to Ro from 2.0%to 3.5%for organic matter.

关键词： Northern Songliao Basin epimetamorphic rock pyrolysis experiment gas generation potential carbon isotope

INTERACTION MECHANISM OF AMPHOTERIC COLLECTOR-I WITH METALLIC IONS AND MINERALS

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Chinese chemical Letters 1991年第5期2卷 403-404页

作者： Xu Xin SHAO Meng Xiong GUO beijing Graduate school, china university of mining and technology beijing 100083.K.Z. LIAO Department of Chemistry, Tsinghua university, beijing 100084

The electronic structure and bonding nature of adsorbing bonding complexes which consist of Amphoteric Collector-I and Mg^(2+), Ca^(2+), MgPO_4^-, CaPO_^-4, CaCO_3, as well aa MgCO_3, are studied using quantum chemistry CNDO/2, It is predicted that magnesium salts are more liable to form adsorbing chelates with Amphoteric Collector-I than calcium salts, and all results coincide with that obtained in flotation.

关键词： mode In INTERACTION MECHANISM OF AMPHOTERIC COLLECTOR-I WITH METALLIC IONS AND MINERALS

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氯化铜-四氯乙烯复合脱除煤中有机硫的研究

燃料化学学报 2003年第5期31卷 390-394页

作者：赵炜朱红闫学海中国矿业大学化工学院江苏徐州221008 北方交通大学理学院北京100044

通过正交实验确定了用氯化铜四氯乙烯复合脱除煤中有机硫的最佳条件,研究了脱硫条件对有机硫脱除率的影响,考察了使用复合法脱硫对煤质的影响。研究结果表明:用氯化铜四氯乙烯复合脱除煤中有机硫效果较好,反应条件温和;最佳脱硫条件是... 详细信息

通过正交实验确定了用氯化铜四氯乙烯复合脱除煤中有机硫的最佳条件,研究了脱硫条件对有机硫脱除率的影响,考察了使用复合法脱硫对煤质的影响。研究结果表明:用氯化铜四氯乙烯复合脱除煤中有机硫效果较好,反应条件温和;最佳脱硫条件是:用四氯乙烯为有机溶剂,煤的粒度为0 076mm,反应时间为120min,反应温度为120℃,煤浆浓度为0.067g mL,在此条件下,脱硫率最高达43%;有机硫脱除率随着煤的粒度的减小而增大,随着反应时间、反应温度、煤浆浓度的增加先增大,达到一定程度后,其变化不再明显,甚至降低;脱硫后,煤的结构基本未发生变化,发热量损失较少。

关键词：煤有机硫脱硫率氯化铜四氯乙烯

Bioscillation and Birhythmicity in the H_2O_2-KSCN-CuSO_4-NaOH System

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chemical Research in Chinese Universities 2001年第3期17卷 299-304页

作者： GAO Qing-yu, SUN Kang and MENG Fan-yong (College of chemical engineering, china university of mining and technology, Xuzhou 221008, P. R. china) CAI Zun-sheng and ZHAO Xue-zhuang (Department of Chemistry, Nankai university, Tianjin 300071, P. R. china) To whom correspondence should be addressed. china Univ mining & Technol Coll Chem Engn Xuzhou 221008 Peoples R China Nankai Univ Dept Chem Tianjin 300071 Peoples R China

Two kinds of different mechanistic oscillations can be displayed in the H_2O_2-KSCN-CuSO_4-NaOH system. One discovered by this study is the pH oscillation in a continuous flow stirred tank reactor(CSTR) resulting from the oxidation of KSCN. The other is the oscillation of H_2O_2 decomposition in both CSTR and batch reactors(reported by Orbáin in 1986). Under appropriate experimental conditions, the system exhibits a birhythmicity in a CSTR. Two different pH oscillations are reported here. The pH oscillations which accompany the decomposition of H_2O_2 exist in the batch reactor and the CSTR at a high flowrate, but the pH oscillations in a CSTR at a low flowrate originates from proton positive and negative feedback in the oxidation of KSCN. The oscillation of non-catalyzed oxidation of KSCN by hydrogen peroxide in a CSTR can be found. Also we have observed whether Cu^(2+) exists or not in the batch system, the pH increases to near neutral ultimately after pH drops twice.

关键词： Bioscillation and birhythmicity pH oscillation H_2O_2 decomposition

Strategic Thinking for Sustainable Development of mining-Based Cities in china

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Chinese Journal of Population,Resources and environment 2004年第3期2卷 60-63页

作者： Xie Shouxiang, Dai Xichao & Wang Yafen school of Management, china university of mining & technology, Xuzhou 221008, china school of Management China University of Mining and Technology Xuzhou 221008 China

Cities based on mining are distinctive from other cities in china. Their heavy dependence on minerals, a relatively undiversified industrial structure, seriously damaged ecological environment and the rather low degree of openness have all reduced their competitiveness, and severely constrained and hindered their sustainable development. In this paper the authors will study mining-based cities from the perspective of sustainable development, first by having a critical review of their features, and then by researching into strategic options to support their sustainable development.

关键词： mining-based cities growth strategy utilization of resources