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基于Quartz.NET框架的任务调度平台研究与设计 被引量:5
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作者 许艳丹 《软件导刊》 2016年第2期82-84,共3页
对常见任务调度场景进行了分析建模,根据分析结果构建了一般任务调度模型。重点对Quartz.NET框架进行研究分析,详细介绍了Quartz.NET框架的特点,完成了任务调度平台框架设计。最后,以一个示例展示了任务调度的实现过程。
关键词 Quarztz.net 任务调度 集群 触发器 调度器
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使用Quartz.net定时备份SQL Server 被引量:2
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作者 陈满 李慰椿 《电脑编程技巧与维护》 2013年第22期44-45,共2页
采用Quartz.net作业调度框架,实现定时备份SQL Server数据库功能,提高了工作效率。
关键词 quartz net框架 Cron表达式 SQL SERVER数据库 备份
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基于Quartz.NET的雨情监测报警程序开发 被引量:1
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作者 李淑静 卿光勇 王锡良 《湖北农业科学》 2021年第19期114-117,122,共5页
为了实现定时从四川省气象局省市县三级预报业务平台Web服务器获取气象站的降水量数据,并且在降水量数值超过规定阈值时,及时提醒值班工作人员做相应的气象服务,采用C#语言,基于Quartz.NET开发了雨情监测报警程序。结果表明,基于Quartz.... 为了实现定时从四川省气象局省市县三级预报业务平台Web服务器获取气象站的降水量数据,并且在降水量数值超过规定阈值时,及时提醒值班工作人员做相应的气象服务,采用C#语言,基于Quartz.NET开发了雨情监测报警程序。结果表明,基于Quartz.NET的雨情监测报警程序,不但能实时监测特定时间段、特定区域范围内各个气象站的累计降水量数据、及时报警,而且还能自动生成决策气象服务所需的雨情通报文档,大大地减轻了工作人员的劳动强度,提高了工作效率,在汛期繁重的气象服务工作中发挥了重要作用。 展开更多
关键词 quartz.net 雨情监测报警 Chrome开发者工具 文档自动化 Aspose.Cells for.net
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Influence of the roughness and shape of quartz particles on their flotation kinetics 被引量:8
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作者 Mehdi Rahimi Fahimeh Dehghani +1 位作者 Bahram Rezai Mohammad Reza Aslani 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2012年第4期284-289,共6页
Surface roughness and shape play an important role on the behavior of particles in various processes such as flotation. In this re- search, the influence of different grinding methods on the surface roughness and shap... Surface roughness and shape play an important role on the behavior of particles in various processes such as flotation. In this re- search, the influence of different grinding methods on the surface roughness and shape characteristics of quartz particles as well as the effect of these parameters on the flotation of the particles was investigated. The surface roughness of the particles was determined by measuring their specific surface area via the gas adsorption method. The shape characteristics of the particles were measured and calculated by images obtained by scanning electron microscopy via an image analysis system. The flotation kinetics was determined using a laboratory flotation cell. The results showed that the particles of rod mill products have higher roughness and elongation ratio and lower roundness than the parti- cles of ball mill products. The flotation kinetics constant of the particles increased with their surface roughness increasing. Particles with higher elongation and lower roundness indicated higher floatability. In addition, the influence of the surface roughness on the flotation kinet- ics was greater than that of shape parameters. 展开更多
关键词 FLOTATION KInetICS quartz shape parameters surface roughness
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Alkaline treatment kinetics of calcium phosphate by piezoelectric quartz crystal impedance 被引量:1
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作者 曾丽萍 何德良 +1 位作者 许超 罗胜联 《Journal of Central South University》 SCIE EI CAS 2009年第4期558-562,共5页
Calcium phosphate film was prepared by electrochemical deposition technology. Subsequently, the alkaline treatment process of calcium phosphate film in 0.1 mol/L NaOH solution was monitored on real time by the piezoel... Calcium phosphate film was prepared by electrochemical deposition technology. Subsequently, the alkaline treatment process of calcium phosphate film in 0.1 mol/L NaOH solution was monitored on real time by the piezoelectric quartz crystal impedance (PQCI) technique. The variations of morphology and composition for the alkaline treatment products were characterized by scanning electron microscopy (SEM), Fourier transform infrared (FT-IR) and X-ray diffraction (XRD), respectively. The dynamic variations of calcium phosphate can be characterized by the change of equivalent circuit parameters. The results show that the forming process of hydroxyapatite (HA) is composed of three stages: (1) acidic calcium phosphate dissolution; (2) phase transformation; and (3) HA formation. Furthermore, the correlative kinetic equations and parameters are obtained by fitting the static capacitance (C8)-time curves. 展开更多
关键词 HYDROXYAPATITE calcium phosphate piezoelectric quartz crystal impedance alkaline treatment KInetICS
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Application of quartz crystal nanobalance in conjunction with a net analyte signal based method for simultaneous determination of leucine, isoleucine and valine 被引量:1
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作者 Maryam Shojaei Abdolreza Mirmohseni Maryam Farbodi 《Journal of Biomedical Science and Engineering》 2009年第7期532-537,共6页
The aim of the present investigation was to develop a biosensor for the detection of amino acids, Leucine, Isoleucine and Valine based on a quartz crystal nanobalance. leucine (Leu), isoleucine (Ile), and valine (Val)... The aim of the present investigation was to develop a biosensor for the detection of amino acids, Leucine, Isoleucine and Valine based on a quartz crystal nanobalance. leucine (Leu), isoleucine (Ile), and valine (Val) were selectively determined by quartz crystal nanobalance (QCN) sensor in conjunction with net analyte signal (NAS)-based method called HLA/GO. An orthogonal design was applied for the formation of calibration and prediction sets including Leu, Ile and Val compounds. The selection of the optimal time range involved the calculation of the net analyte sig-nal regression plot in any considered time window for each test sample. The searching of a region with maximum linearity of NAS regression plot (minimum error indicator) and minimum of PRESS value was carried out by applying a moving window strategy. On the base of obtained results, the differences on the adsorption profiles in the time range between 1 and 300 s were used to determine mixtures of compounds by HLA/GO method. The results showed that the method was successfully applied for the determina-tion of Leu, Ile and Val. 展开更多
关键词 quartz Crystal Nanobalance net ANALYTE Signal LEUCINE ISOLEUCINE VALINE HLA/GO Method
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A highly sensitive LITES sensor based on a multi-pass cell with dense spot pattern and a novel quartz tuning fork with low frequency 被引量:3
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作者 Yahui Liu Shunda Qiao +4 位作者 Chao Fang Ying He Haiyue Sun Jian Liu Yufei Ma 《Opto-Electronic Advances》 SCIE EI CAS CSCD 2024年第3期26-34,共9页
A highly sensitive light-induced thermoelectric spectroscopy(LITES)sensor based on a multi-pass cell(MPC)with dense spot pattern and a novel quartz tuning fork(QTF)with low resonance frequency is reported in this manu... A highly sensitive light-induced thermoelectric spectroscopy(LITES)sensor based on a multi-pass cell(MPC)with dense spot pattern and a novel quartz tuning fork(QTF)with low resonance frequency is reported in this manuscript.An erbi-um-doped fiber amplifier(EDFA)was employed to amplify the output optical power so that the signal level was further enhanced.The optical path length(OPL)and the ratio of optical path length to volume(RLV)of the MPC is 37.7 m and 13.8 cm^(-2),respectively.A commercial QTF and a self-designed trapezoidal-tip QTF with low frequency of 9461.83 Hz were used as the detectors of the sensor,respectively.The target gas selected to test the performance of the system was acetylene(C2H2).When the optical power was constant at 1000 mW,the minimum detection limit(MDL)of the C2H2-LITES sensor can be achieved 48.3 ppb when using the commercial QTF and 24.6 ppb when using the trapezoid-al-tip QTF.An improvement of the detection performance by a factor of 1.96 was achieved after replacing the commer-cial QTF with the trapezoidal-tip QTF. 展开更多
关键词 light-induced thermoelectric spectroscopy quartz tuning fork multi-pass cell gas sensing
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Diffusion and reaction mechanism of limestone and quartz in fluxed iron ore pellet roasting process 被引量:1
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作者 Yufeng Guo Jinlai Zhang +5 位作者 Shuai Wang Jianjun Fan Haokun Li Feng Chen Kuo Liu Lingzhi Yang 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2024年第3期485-497,共13页
The increase to the proportion of fluxed pellets in the blast furnace burden is a useful way to reduce the carbon emissions in the ironmaking process.In this study,the interaction between calcium carbonate and iron or... The increase to the proportion of fluxed pellets in the blast furnace burden is a useful way to reduce the carbon emissions in the ironmaking process.In this study,the interaction between calcium carbonate and iron ore powder and the mineralization mechanism of fluxed iron ore pellet in the roasting process were investigated through diffusion couple experiments.Scanning electron microscopy with energy dispersive spectroscopy was used to study the elements’diffusion and phase transformation during the roasting process.The results indicated that limestone decomposed into calcium oxide,and magnetite was oxidized to hematite at the early stage of preheating.With the increase in roasting temperature,the diffusion rate of Fe and Ca was obviously accelerated,while the diffusion rate of Si was relatively slow.The order of magnitude of interdiffusion coefficient of Fe_(2)O_(3)-CaO diffusion couple was 10^(−10) m^(2)·s^(−1) at a roasting temperature of 1200℃for 9 h.Ca_(2)Fe_(2)O_(5) was the initial product in the Fe_(2)O_(3)-CaO-SiO_(2) diffusion interface,and then Ca_(2)Fe_(2)O_(5) continued to react with Fe_(2)O_(3) to form CaFe_(2)O_(4).With the expansion of the diffusion region,the sillico-ferrite of calcium liquid phase was produced due to the melting of SiO_(2) into CaFe_(2)O_(4),which can strengthen the consolidation of fluxed pellets.Furthermore,andradite would be formed around a small part of quartz particles,which is also conducive to the consolidation of fluxed pellets.In addition,the principle diagram of limestone and quartz diffusion reaction in the process of fluxed pellet roasting was discussed. 展开更多
关键词 fluxed iron ore pellet LIMESTONE HEMATITE quartz diffusion reaction
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基于Quartz.NET的任务调度系统在医院信息化中的应用研究 被引量:1
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作者 黄昌可 《电脑知识与技术》 2023年第13期63-66,共4页
文章探讨了Quartz.NET任务调度系统在医院信息化中的应用。通过对任务调度系统的介绍和Quartz.NET的特点分析,文章提出了基于Quartz.NET的任务调度系统在医院信息化中的应用方案,主要包括任务调度系统的设计和实现、任务执行监控和报警... 文章探讨了Quartz.NET任务调度系统在医院信息化中的应用。通过对任务调度系统的介绍和Quartz.NET的特点分析,文章提出了基于Quartz.NET的任务调度系统在医院信息化中的应用方案,主要包括任务调度系统的设计和实现、任务执行监控和报警机制的建立等方面。该方案在实际应用中,有效提高了医院信息化系统的运行效率和管理水平,减轻人工负担,提高医院服务水平,具有较高的实用价值和推广意义。 展开更多
关键词 quartz.net 任务调度 医院信息化
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A Series Piezoelectric Quartz Crystal Response Kinetics for T.ferrooxidans Growth in the Presence of Cu(Ⅱ)
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作者 CHAI Li yuan 1,2 ,WEI Wan zhi 2,YAO Shou zhuo 2(1. Department of Metallurgical Science and Engineering, Central South University of Technology, Changsha 410083, China 2. College of Chemistry and Chemical Engineering, Hunan University, Changsha 《Journal of Central South University》 SCIE EI CAS 2000年第1期15-19,共5页
The kinetics on the growth of T.ferrooxidans in the presence of Cu(Ⅱ) was studied using of series piezoelectric quartz crystal (SPQC). Arsenic ion inhibits the growth of T.ferrooxidans , which is consistent with the ... The kinetics on the growth of T.ferrooxidans in the presence of Cu(Ⅱ) was studied using of series piezoelectric quartz crystal (SPQC). Arsenic ion inhibits the growth of T.ferrooxidans , which is consistent with the previous results by other measuring methods. This further demonstrates that the SPQC can monitor the chemical activity of T.ferrooxidans growth. Cupric ion accelerates the growth of T.ferrooxidans . The mechanism was discussed, i. e., copper promotes the protein enzyme of T.ferrooxidans , rusticyanin, to form over the range of cupric ion concentration studied. The reaction order of cupric ion in accelerating the bacterial growth is 0.067. The growth of T.ferrooxidans is dependent on temperature, the apparent reaction activation energy decreases from 25.56 kJ/mol to 18.32 kJ/mol because of the addition of 10 mg/L Cu(Ⅱ) to the bacterial growth solution of pH 2.0 at initial inoculum of 10%. 展开更多
关键词 SERIES piezoelectric quartz crystal T.ferrooxidans GROWTH KInetICS SIGMOID CURVE cupric ion
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Applications of Natural Radiation-Induced Paramagnetic Defects in Quartz to Exploration in Sedimentary Basins
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作者 潘元明 Botis S Nokhrin S 《Journal of China University of Geosciences》 CSCD 2006年第3期258-271,共14页
Quartz grains in contact with uranium-bearing minerals or fluids are characterized by natural radiation-induced paramagnetic defects (e. g. , oxygen vacancy centers, silicon vacancy centers, and peroxy radicals), wh... Quartz grains in contact with uranium-bearing minerals or fluids are characterized by natural radiation-induced paramagnetic defects (e. g. , oxygen vacancy centers, silicon vacancy centers, and peroxy radicals), which are amenable to study by electron paramagnetic resonance (EPR) spectroscopy. These natural radiation-induced paramagnetic defects, except for the oxygen vacancy centers, in quartz are concentrated in narrow bands penetrated by α particles: (1) in halos around U- and Th-bearing mineral inclusions and (2) in outer rims or along fractures. The second type of occurrence provides information about uranium mineralization or remobilization (i. e. , sources of uranium, timing of mineralization or remobilization, pathways of uranium-bearing fluids). It can also be used to evaluate sedimentary basins for potential of uranium mineralization. In particular, the peroxy radicals are stable up to 800℃ and, therefore, are useful for evaluating metasedimentary rocks (e. g. , Paleoproterozoic metasedimentary sequences in the central zone of the North China craton). EPR study of the Changcheng Series can focus on quartz from the sediment-basement unconformity and faults to determine the presence and types of natural radiation-induced paramagnetic defects, with which to identify and prioritize uranium anomalies. Other potential applications of natural radiation-induced paramagnetic defects in quartz include uranium-bearing hydrocarbon deposits in sedimentary basins. For example, the Junggar, Ordos, and Tarim basins in northwestern China all contain important oil and natural gas fields and are well known for elevated uranium concentrations, including economic sandstone-hosted uranium deposits. Therefore, systematic studies on the distribution of natural radiation-induced paramagnetic defects in quartz from host sedimentary sequences are expected to provide information about the migration of oil and natural gas in those basins. 展开更多
关键词 quartz natural radiation-induced paramagnetic defects EPR spectroscopy uranium deposits hydrocarbon resources Chinese sedimentary basins.
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Etching of quartz crystals in liquid phase environment:A review
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作者 Yide Dong Yike Zhou +5 位作者 Haizhou Huang Bosong Zhang Xihan Li Kaiwen Chen Litao Sun Guangbin Dou 《Nanotechnology and Precision Engineering》 EI CAS CSCD 2024年第2期87-109,共23页
Quartz crystals are the most widely used material in resonant sensors,owing to their excellent piezoelectric and mechanical properties.With the development of portable and wearable devices,higher processing efficiency... Quartz crystals are the most widely used material in resonant sensors,owing to their excellent piezoelectric and mechanical properties.With the development of portable and wearable devices,higher processing efficiency and geometrical precision are required.Wet etching has been proven to be the most efficient etching method for large-scale production of quartz devices,and many wet etching approaches have been developed over the years.However,until now,there has been no systematic review of quartz crystal etching in liquid phase environments.Therefore,this article provides a comprehensive review of the development of wet etching processes and the achievements of the latest research in thisfield,covering conventional wet etching,additive etching,laser-induced backside wet etching,electrochemical etching,and electrochemical discharge machining.For each technique,a brief overview of its characteristics is provided,associated problems are described,and possible solutions are discussed.This review should provide an essential reference and guidance for the future development of processing strategies for the manufacture of quartz crystal devices. 展开更多
关键词 quartz crystal Materials processing Wet etching MICROFABRICATION quartz MEMS
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Unveiling Nb-Ta mineralization processes:Insight from quartz textural and chemical characteristics in the Songshugang deposit,Jiangxi Province,South China
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作者 Hengsong Zhang Shaohao Zou +4 位作者 Xilian Chen Deru Xu Zhilin Wang Yongwen Zhang Hua Wang 《Acta Geochimica》 EI CAS CSCD 2024年第4期737-753,共17页
The Songshugang deposit is a large Ta-Nb deposit in South China,with Ta-Nb mineralization associated genetically with the granite and pegmatite.A diversity of quartz from topaz-albite granite,quartz-mica pegmatite,qua... The Songshugang deposit is a large Ta-Nb deposit in South China,with Ta-Nb mineralization associated genetically with the granite and pegmatite.A diversity of quartz from topaz-albite granite,quartz-mica pegmatite,quartz-feldspar pegmatite,and quartz-fluorite pegmatite at Songshugang was studied by CL and LA-ICP-MS in order to constrain enrichment mechanisms of Nb and Ta and to find geochemical indicators of quartz for rare metal deposits.Cathodoluminescence image illuminates a canvas of complexity,the quartz from topaz-albite granite,quartz-mica pegmatite,quartz-feldspar pegmatite,and quartz-fluorite pegmatite,exhibits numerous dark CL streaks,patches,and a series of healed fractures.These textures suggest that the rocks were fractured because of deep crustal pressure,and underwent later hydrothermal metasomatism and quartz filling.The quartz from quartz-fluorite pegmatite present limited patches or fractures but distinct growth bands,indicating that the melt fluid composition during the formation of quartz at this stage varies greatly and is less aff ected by mechanical fragmentation.The LA-ICP-MS analysis of quartz shows that there is a positive correlation between Al and Li in the quartz from topaz-albite granite,quartz-mica pegmatite,quartz-feldspar pegmatite,to quartz-fluorite pegmatite,indicating that Al mainly enters the quartz lattice through charge compensation substitution mechanism with Li.However,our data deviate from the theoretical Li:Al mass ratio of~1:3.89 in quartz,indicating that there may be competition between H^(+)and Li in a water-rich magmatic environment.The quartz from topaz-albite granite is enriched in K and Na elements,and the quartz from quartz-fluorite pegmatite is enriched in fluorite with a low Ca content in quartz,further elucidating that these rocks were subjected to hydrothermal metasomatism.From topaz-albitite granite to quartz-fluorite pegmatite,Al,Li and Ge content and Al/Ti,Ge/Ti,Sb/Ti ratios in quartz gradually increased,but Ti content gradually decreased,reflecting the high evolution of magma,which can enrich rare metal elements.Based on the characteristics of quartz CL textures and trace elements in topaz-albite granite,quartz-mica pegmatite,quartz-feldspar pegmatite,and quartz-fluorite pegmatite,combined with the albitization and K-feldspathization of rocks,it is suggested that the Nb-Ta mineralization in Songshugang may be influenced by the combined action of magmatic crystallization differentiation and fluid metasomatism.By comparing the quartz in the Songshugang pluton with the quartz in the granite type and pegmatite type rare metal deposits recognized in the world,the Songshugang pegmatite share similarities with the LCT-type pegmatite.Combined with previous studies,the Ge/Ti>0.1 and Ti<10 ppm,as well as Al,Li,Ge,Sb,K,Na contents and Al/Ti,Sb/Ti ratios in quartz have the potential to be a powerful exploration marker for identifying granite-like pegmatitic Nb-Ta deposits in other places. 展开更多
关键词 Nb-Ta deposit quartz CATHODOLUMINESCENCE LA-ICP-MS Trace elements Magma-hydrothermal evolution
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Crystal structure transformation and lattice impurities migration of quartz during chlorine roasting
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作者 Wenda Guo Haolong Lu +4 位作者 Zhenyue Zhang Ling Jiang Hanjun Wu Defeng Liu Ruan Chi 《International Journal of Mining Science and Technology》 SCIE EI CAS CSCD 2024年第10期1465-1474,共10页
To investigate the effect of chlorine roasting on the migration and removal of trace elements in quartz lattice,firstly,an efficient pretreatment process,grinding–HCl washing–flotation–HF and HCl leaching,was used ... To investigate the effect of chlorine roasting on the migration and removal of trace elements in quartz lattice,firstly,an efficient pretreatment process,grinding–HCl washing–flotation–HF and HCl leaching,was used to remove the gangue minerals in quartz ore to obtain purified quartz for the preparation of high-purity quartz and the investigation of lattice impurities migration.The results showed that the high-purity quartz with total impurities less than 50μg/g could be obtained from purified quartz after being treated with chlorine at 1200°C.The variation of crystal structure and the lattice impurities migration of quartz during chlorine roasting were studied through in-situ XRD,TGA,SEM-EDS,ICP-MS,FT-IR and XPS analysis.It revealed that the decomposable impurities H_(2)O,-OH,and residual collectors in the crystal of purified quartz could be effectively removed through chlorine roasting above 900°C,which also had an obvious effect on the removal of low-valence trace elements Li,Na and K in the crystal of quartz but didn't affect the multivalent trace elements Al and Ti.This study revealed the removal and migration mechanism of the trace elements in quartz crystal during chlorine roasting. 展开更多
关键词 quartz Purification Chlorine roasting Crystal structure Trace elements
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Trace elements in magmatic and hydrothermal quartz:Implications on the genesis of the Xingluokeng Tungsten Deposit,South China
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作者 Qing-Qing Zhang You-Wei Chen Jian-Feng Gao 《Acta Geochimica》 EI CAS CSCD 2024年第3期441-458,共18页
The Xingluokeng deposit is the largest gran-ite-related tungsten deposit within the Wuyi metallogenic belt in South China.The Xingluokeng intrusion primarily consists of porphyritic biotite granite,biotite granite,and... The Xingluokeng deposit is the largest gran-ite-related tungsten deposit within the Wuyi metallogenic belt in South China.The Xingluokeng intrusion primarily consists of porphyritic biotite granite,biotite granite,andfine-grained granite.The deposit is represented by veinlet-disseminated mineralization with K-feldspathization and biotitization,alongside quartz-vein mineralization with gre-isenization and sericitization.This study investigates in-situ analyses of quartz compositions from both the intrusion and hydrothermal veinlets and veins.Trace element correlations indicate that trivalent Al^(3+)and Fe^(3+)replace Si^(4+)within the quartz lattice,with monovalent cations(such as Li^(+),Na^(+),and K^(+))primarily serving as charge compensators.Low Ge/Al ratios(<0.013)of quartz from granites suggest a mag-matic origin.The low Al/Ti and Ge/Ti ratios,accompanied by high Ti contents in quartz,suggest that the porphyritic biotite granite and biotite granite are characterized by rela-tively low levels of differentiation and high crystallization temperatures.In contrast,thefine-grained granite exhibits a higher degree of fractionation,lower crystallization tem-peratures,and a closer association with tungsten miner-alization.Ti contents in quartz from quartz veins indicate Qz-Ⅰformed at temperatures above 400°C,while Qz-Ⅱto Qz-Ⅴformed at temperatures below 350°C.Variations in different generations of quartz,as indicated by Al content and(Al+Fe)/(Li+Na+K)ratio,suggest that Qz-Ⅰprecipi-tated from a less acidicfluid with a stable pH,whereas Qz-Ⅱto Qz-Ⅴoriginated from a more acidicfluid with notable pH variations.Consequently,alkaline alteration and acidic alteration supplied the essential Ca and Fe for the precipita-tion of scheelite and wolframite,respectively,highlighting a critical mechanism in tungsten mineralization at the Xin-gluokeng deposit. 展开更多
关键词 quartz Xingluokeng Tungsten deposit Trace elements South China
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Quartz.NET 1.0
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《程序员》 2008年第12期122-122,共1页
Quartz.NET是一个开源的调度框架,经历了2年多的开发终于发布了。该版本对应Java的Quartz 1.6.2版本。它在作业调度方面提供了很好的灵活性而不牺牲简单性,能够为执行一个作业而创建简单的或复杂的调度。目前的版本支持数据库、集群... Quartz.NET是一个开源的调度框架,经历了2年多的开发终于发布了。该版本对应Java的Quartz 1.6.2版本。它在作业调度方面提供了很好的灵活性而不牺牲简单性,能够为执行一个作业而创建简单的或复杂的调度。目前的版本支持数据库、集群、插件,支持cron-like表达式等等。 展开更多
关键词 quartz.net 调度框架 数据库 插件
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Synergistic strengthening mechanism of Ca^(2+)-sodium silicate to selective separation of feldspar and quartz
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作者 Bo Lin Jingzhong Kuang +3 位作者 Yiqiang Yang Zheyu Huang Delong Yang Mingming Yu 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2024年第9期1985-1995,共11页
Inhibitors are important for flotation separation of quartz and feldspar.In this study,a novel combined inhibitor was used to separate quartz and feldspar in near-neutral pulp.Selective inhibition of the combined inhi... Inhibitors are important for flotation separation of quartz and feldspar.In this study,a novel combined inhibitor was used to separate quartz and feldspar in near-neutral pulp.Selective inhibition of the combined inhibitor was assessed by micro-flotation experiments.And a series of detection methods were used to detect differences in the surface properties of feldspars and quartz after flotation reagents and put forward the synergistic strengthening mechanism.The outcomes were pointed out that pre-mixing combined inhibitors were more effective than the addition of Ca^(2+)and SS in sequence under the optimal proportion of 1:5.A concentrate from artificial mixed minerals that was characterized by a high quartz grade and a high recovery was acquired,and was found to be 90.70wt% and 83.70%,respectively.It was demonstrated that the combined inhibitor selectively prevented the action of the collector and feldspar from Fourier-transform infrared(FT-IR)and adsorption capacity tests.The results of X-ray photoelectron spectroscopy(XPS)indicated that Ca^(2+)directly interacts with the surface of quartz to increase the adsorption of collectors.In contrast,the chemistry property of Al on the feldspar surface was altered by combined inhibitor due to Na^(+)and Ca^(2+)taking the place of K^(+),resulting in the composite inhibitor forms a hydrophilic structure,which prevents the adsorption of the collector on the surface of feldspar by interacting with the Al active site.The combination of Ca^(2+)and SS synergically strengthens the difference of collecting property between quartz and feldspar by collector,thus achieving the effect of efficient separation.A new strategy for flotation to separate quartz from feldspar in near-neutral pulp was provided. 展开更多
关键词 FELDSPAR quartz Ca^(2+)-sodium silicate selective adsorption flotation separation
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Flotation separation of andalusite from quartz using sodium petroleum sulfonate as collector 被引量:7
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作者 朱海玲 邓海波 陈臣 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2015年第4期1279-1285,共7页
The floatability of andalusite and quartz was studied using sodium petroleum sulfonate as collector, being successfully applied in the real ore separation. The collecting performance on minerals was interpreted by mea... The floatability of andalusite and quartz was studied using sodium petroleum sulfonate as collector, being successfully applied in the real ore separation. The collecting performance on minerals was interpreted by means of zeta potential measurement and infrared spectroscopic analysis. The single mineral experiments showed that andalusite got good floatability in acidic pH region while quartz exhibited very poor floatability in the whole pH range. At pH 3, the presence of Fe3+ obviously activated quartz, causing the identical flotation behavior of the two minerals, and calcium lignosulphonate exhibited good selective inhibition to quartz. The real ore test results showed that andalusite concentrate with 53.46% Al2O3 and quartz concentrate with 92.74% SiO2 were obtained. The zeta potential and infrared spectroscopic analysis results indicated that chemical adsorption occurred between sodium petroleum sulfonate and andalusite. 展开更多
关键词 flotation separation ANDALUSITE quartz sodium petroleum sulfonate
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Quartz调度器与Web程序整合的研究和应用 被引量:14
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作者 胡利强 周冬初 王伟 《计算机与现代化》 2010年第8期98-99,104,共3页
Quartz是一个开源的作业调度框架,它完全由Java写成,运用于J2SE和J2EE应用中,能够为执行一个作业而创建简单或复杂的调度。本文简要阐述它的机制原理以及在Web中的任务制作和调度的应用过程及整合原理。
关键词 quartz 作业 WEB 调度器
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Contribution of components from volume defect in natural pyrite and quartz to solution chemistry of flotation pulp 被引量:2
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作者 先永骏 聂琪 +1 位作者 文书明 王伊杰 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2015年第9期3119-3125,共7页
The volume defects in pure pyrite and quartz from a classical Cu-Pb-Zn-Fe sulfide deposit were investigated.The results indicate that a large number of volume defects exist in natural pyrite and quartz.The volume defe... The volume defects in pure pyrite and quartz from a classical Cu-Pb-Zn-Fe sulfide deposit were investigated.The results indicate that a large number of volume defects exist in natural pyrite and quartz.The volume defects assume a variety of shapes,including long strips,oval shapes and irregular shapes,with sizes ranging from a few microns to dozens of microns.These volume defects are rich in metallogenic elements as a result of the capture of metallogenic and mineralizing fluid during the defect-forming process.The volume defects are fractured during the grinding process,and their chemical components are released into the solution,as confirmed by the abundant presence of various metal and non-metal components in the cleaning water and EDS results.Under the experimental conditions of 10 g pyrite or quartz with grinding fineness of d90=37 μm,which was cleaned in 40 m L of pure deionised water under an inert atmosphere,the total average concentrations of Cu,Pb,Zn,Fe,Ca,Mg and Cl-in the aqueous solution are 32.09×10^-7,16.51×10^-7,19.45×10^-7,516.52×10^-7,129.50×10^-7,35.30×10^-7 and 433.80×10^-7 mol/L,respectively,for pyrite and 19.20×10^-7,8.88×10^-7,8.31×10^-7,82.71×10^-7,16.21×10^-7,4.28×10^-7 and 731.26×10^-7 mol/L,respectively,for quartz.These values are significantly greater than those from the experimental non-oxidative dissolution of the pyrite or quartz,respectively.Therefore,the metallogenic fluid in volume defects of mineral crystal is concluded to represent the dominant contribution to the solution chemistry of sulfide flotation pulp.The present investigation will help to deeply understand the flotation theory of sulfide minerals. 展开更多
关键词 PYRITE quartz volume defect metallogenic fluid component release
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