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Pressure stimulated current in progressive failure process of combined coal-rock under uniaxial compression:Response and mechanism
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作者 Tiancheng Shan Zhonghui Li +7 位作者 Xin Zhang Haishan Jia Xiaoran Wang Enyuan Wang Yue Niu Dong Chen Weichen Sun Dongming Wang 《International Journal of Mining Science and Technology》 SCIE EI CAS CSCD 2024年第2期227-243,共17页
Effective monitoring of the structural health of combined coal-rock under complex geological conditions by pressure stimulated currents(PSCs)has great potential for the understanding of dynamic disasters in undergroun... Effective monitoring of the structural health of combined coal-rock under complex geological conditions by pressure stimulated currents(PSCs)has great potential for the understanding of dynamic disasters in underground engineering.To reveal the effect of this way,the uniaxial compression experiments with PSC monitoring were conducted on three types of coal-rock combination samples with different strength combinations.The mechanism explanation of PSCs are investigated by resistivity test,atomic force microscopy(AFM)and computed tomography(CT)methods,and a PSC flow model based on progressive failure process is proposed.The influence of strength combinations on PSCs in the progressive failure process are emphasized.The results show the PSC responses between rock part,coal part and the two components are different,which are affected by multi-scale fracture characteristics and electrical properties.As the rock strength decreases,the progressive failure process changes obviously with the influence range of interface constraint effect decreasing,resulting in the different responses of PSC strength and direction in different parts to fracture behaviors.The PSC flow model is initially validated by the relationship between the accumulated charges of different parts.The results are expected to provide a new reference and method for mining design and roadway quality assessment. 展开更多
关键词 combined coal-rock Pressure stimulated current Progressive failure process MECHANISM Flow model
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Optimization and Characterization of Combined Degumming Process of Typha angustata L. Stem Fibers
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作者 Sana Rezig Foued Khoffi +2 位作者 Mounir Jaouadi Asma Eloudiani Slah Msahli 《Journal of Renewable Materials》 EI CAS 2024年第6期1071-1086,共16页
Plant derived natural fibers have been widely investigated as alternatives to synthetic fibers in reinforcing polymers.Researchers over the years have explored many plant fibers using different extraction processes to... Plant derived natural fibers have been widely investigated as alternatives to synthetic fibers in reinforcing polymers.Researchers over the years have explored many plant fibers using different extraction processes to study their physical,chemical,and mechanical properties.In this context,the present study relates to the extraction,characterization,and optimization of Typha angustata L.stem fibers.For this purpose,desirability functions and response surface methodology were applied to simultaneously optimize the diameter(D),linear density(LD);yield(Y),lignin fraction(L),and tenacity(T)of Typha stem fibers.Typha stems have been subjected to both alkali(NaOH)and enzymatic(pectinex ultra-SPL)treatments.Three levels of process variables including enzyme concentration(10,15,and 20 ml/L)and treatment duration(10,15,and 20 days)were used to design the experiments according to the factorial design.Experimental results were examined by analysis of variance and fitted to second order polynomial model using multiple regression analysis.The Derringer’s desirability function released that the values of process variables generating optimized diameter,linear density,yield,lignin ratio and tenacity are 20 ml/L and 20 days for concentration of pectinex ultra-SPL enzyme and treatment duration,respectively.Confirmation was performed and high degree of correlation was found between the experimental and statistical values.Moreover,the morphological structure has been investigated by the scanning electron microscope,showing a crenelated structure of ultimate fiber bundles of cellulose composing the Typha fiber.Compared to Typha stem non-treated fibers(TSNTF),Typha stem combined treated fibers(TSCTF),brings to improve mechanical properties.This change in mechanical properties is affected by modifying the fiber structure showing alpha cellulose of(66.86%)and lignin ratio of(10.83%)with a crystallinity index of(58.47%). 展开更多
关键词 Typha angustata L.stems fibers combined treatment optimization process desirability function chemical and physical properties morphological structure
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Multi-output Gaussian Process Regression Model with Combined Kernel Function for Polyester Esterification Processes
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作者 王恒骞 耿君先 陈磊 《Journal of Donghua University(English Edition)》 CAS 2023年第1期27-33,共7页
In polyester fiber industrial processes,the prediction of key performance indicators is vital for product quality.The esterification process is an indispensable step in the polyester polymerization process.It has the ... In polyester fiber industrial processes,the prediction of key performance indicators is vital for product quality.The esterification process is an indispensable step in the polyester polymerization process.It has the characteristics of strong coupling,nonlinearity and complex mechanism.To solve these problems,we put forward a multi-output Gaussian process regression(MGPR)model based on the combined kernel function for the polyester esterification process.Since the seasonal and trend decomposition using loess(STL)can extract the periodic and trend characteristics of time series,a combined kernel function based on the STL and the kernel function analysis is constructed for the MGPR.The effectiveness of the proposed model is verified by the actual polyester esterification process data collected from fiber production. 展开更多
关键词 seasonal and trend decomposition using loess(STL) multi-output Gaussian process regression combined kernel function polyester esterification process
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Pollutants removal and simulation model of combined membrane process for wastewater treatment and reuse in submarine cabin for long voyage 被引量:1
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作者 CHEN Zhaobo ZHOU Aijuan +2 位作者 REN Nanqi TIAN Yu HU Dongxue 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2009年第11期1503-1512,共10页
A laboratory scale test was conducted in a combined membrane process (CMP) with a capacity of 2.91 m3/d for 240 d to treat the mixed wastewater of humidity condensate, hygiene wastewater and urine in submarine cabin... A laboratory scale test was conducted in a combined membrane process (CMP) with a capacity of 2.91 m3/d for 240 d to treat the mixed wastewater of humidity condensate, hygiene wastewater and urine in submarine cabin during prolonged voyage. Removal performance of chemical oxygen demand (COD), ammonia nitrogen (NH4^+-N), turbidity and anionic surfactants (LAS) was investigated under different conditions. It was observed that the effluent COD, NH4^+-N, turbidity and LAS flocculated in ranges of 0.19-0.85 mg/L, 0.03-0.18 mg/L, 0.0-0.15 NTU and 0.0-0.05 mg/L, respectively in spite of considerable fluctuation in corresponding influent of 2120-5350 mg/L, 79.5-129.3 mg/L, 110-181.1NTU and 4.9-5.4 mg/L. The effluent quality of the CMP could meet the requirements of mechanical water and hygiene water according to the class I water quality standards in China (GB3838-2002). The removal rates of COD, NH4^+-N, turbidity and LAS removed in the MBR were more than 90%, which indicated that biodegradation is indispensable and plays a major role in the wastewater treatment and reuse. A model, built on the back propagation neural network (BPNN) theory, was developed for the simulation of CMP and produced high reliability. The average error of COD and NH4^+-N was 5.14% and 6.20%, respectively, and the root mean squared error of turbidity and LAS was 2.76% and 1.41%, respectively. The results indicated that the model well fitted the laboratory data, and was able to simulate the removal of COD, NH4^+-N, turbidity and LAS. It also suggested that the model proposed could reflect and manage the operation of CMP for the treatment of the mixed wastewaters in submarine. 展开更多
关键词 combined membrane process wastewater treatment and reuse back propagation neural network
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Metallurgical Reaction Characteristic for the Combined Blowing Process of Top-Bottom Blown Oxygen and Bottom Blown Natural Gas
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作者 颜广庭 唐萍 张淑筠 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 1991年第1期50-54,共5页
The experiment was carried out in a combined blowing converter.The natural gas was supplied as the cooling medium for the bottom lance.The blow- ing practice of medium P hot metal (0.30-0.85% [P]) indicated that with ... The experiment was carried out in a combined blowing converter.The natural gas was supplied as the cooling medium for the bottom lance.The blow- ing practice of medium P hot metal (0.30-0.85% [P]) indicated that with better stirring at the bottom of the converter and lower P_(CO),this steelmgking process was favorable to reduce the amount of [C] and [O] and increase the (P_2O_5)/[P]. The maximum rate of dephospborization might be high up to 0.0a5%/min and the P content in steel could be reduced to lower than 0.03% by single slag-forming operation. 展开更多
关键词 combined blowing process metallurgical reaction oxygen blowing
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Optimization of continuous electrocoagulation-adsorption combined process for the treatment of a textile effluent
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作者 Kamel Hendaoui Malika Trabelsi-Ayadi Fadhila Ayari 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2022年第4期310-320,共11页
The aims of this study is to design and optimize the functioning of a full continuous combined process based on electrocoagulaion-adsorption on crude Tunisian clay to treat a real textile effluent.The clay characteriz... The aims of this study is to design and optimize the functioning of a full continuous combined process based on electrocoagulaion-adsorption on crude Tunisian clay to treat a real textile effluent.The clay characterization shows that the used clay is a rich-smectite clay.The response surface methodology(RSM)technique based on Box-Behnken design(BBD)was used to optimize the process.At optimum conditions which are initial pH solution of 8.24,effluent flow rate of 0.5 L·min^(-1),voltage of 70 V,and added suspension of clay flow rate of 100 ml·min^(-1) the achieved color,chemical oxygen demand(COD)and total suspended solid(TSS)removal efficiencies were respectively 96.87%,89.77%and 84.46%with0.75 USD·m^(-3) as total cost.The additional laboratory experiments at optimum conditions agree with the predicted results,which confirm the accuracy and the capability of RSM to predict results in the defined space.Finally the designed process could be a good eco-friendly alternative to treat and reuse wastewater in industrial process with reasonable cost. 展开更多
关键词 combined process Textile effluent ELECTROCOAGULATION ADSORPTION Decontamination efficiencies Response surface methodology
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Full scale application of combined SBF-AS process for municipal wastewater treatment in small towns and cities in China
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作者 刘硕 王宝贞 +2 位作者 王琳 丁永伟 周宏均 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2006年第3期347-353,共7页
The combined submerged biofilm ( SBF)-activated sludge (AS) process for treatment of municipal wastewater in a small city in China is described in this paper. The process exhibited high removal efficiencies for ca... The combined submerged biofilm ( SBF)-activated sludge (AS) process for treatment of municipal wastewater in a small city in China is described in this paper. The process exhibited high removal efficiencies for carbonaceous substances, nitrogen and phosphorus which mainly took place in the combined SBF-AS biore- actor. The SBF-AS bioreactor was divided into pre-anoxic, anaerobic, anoxic and aerobic zones from inlet to outlet, in which fixed biofilm carriers were packed. Excellent performance had been obtained under normal operating conditions in more than one year of operation in Dong' e municipal WWTP, Shandong province, with mean removal efficiencies of BOD5 93.4%, COD 88%, SS 92%, NH4 - N 82. 1%, TP 75% and TN 66.7%, and quite high effluent quality such as BOD5 6 to 10 rag/L, COD 20 to 40 rag/L, SS 5 to 10 rag/L, TN 10 to 20 rag/L, NH4 - N 4 to 8 mg/L and TP 0. 6 to 1.0 mg/L. The effluent was reused multi-purposely, such as toilet flushing, green belt watering and artificial lake pounding. Simultaneous nitrification and denitrification took place due to the DO gradient in biofilm in aerobic zone of the SBF-AS bioreactor, which made TN removal efficiency improved remarkably in system. Some activated sludge was returned from final clarifiers to the bioreactor for phosphorus removal. The process had the advantages of low investment and low operational/ maintenance (O/M) costs, low sludge yield and was preferably employed in small towns and cities. 展开更多
关键词 wastewater treatment plant (WWTP) in small cities and towns combined submerged biofilm-activated sludge (SBF-AS) process simultaneous nitrification and denitrification (SND) DO gradient phosphor-us removal
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ANALYSIS OF SURFACE CRACK ON FORWARD EXTRUDING BAR DURING AXISYMMETRIC CUP-BAR COMBINED EXTRUSION PROCESS
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作者 李淼泉 吴诗惇 唐才荣 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI 1990年第8期733-741,共9页
In this paper, the kinematically admissible velocity field with surface crack on forward extruding bar is put forward during the axisymmetric cup-bar combined extrusion process, in accordance with the results of model... In this paper, the kinematically admissible velocity field with surface crack on forward extruding bar is put forward during the axisymmetric cup-bar combined extrusion process, in accordance with the results of model experiments.On the basis of velocity field, the necessary condition for surface crack formation on the forward extruding bar is derived, with the help of upper bound theorem and the minimum energy principle. Meanwhile, the relationships between surface crack formation and combination of reduction in area for the part of forward and backward extursions relative residual thickness of billet (T/R0),frictional factor (m) or relative land length of ram and chamber are calculated during the extrusion process. Therefore, whether the surface crack on forward exturding bar occurs can be predicted before extruding the lower-plasticity metals for axisymmetric cup-bar combined extrusion process.The analytical results agree very well with experimental results of aluminium alloy LY12 (ASTM 2024) and LC4 (ASTM 7075). 展开更多
关键词 ANALYSIS OF SURFACE CRACK ON FORWARD EXTRUDING BAR DURING AXISYMMETRIC CUP-BAR combined EXTRUSION process
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The Integration of Vacuum Brazing into Heat Treatment - A Progressive Combined Process
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作者 Ingo Reinkensmeier Henkjan Buursen 《材料热处理学报》 EI CAS CSCD 北大核心 2004年第5期597-600,共4页
The continuous constructive challenge to improve the functionality and efficiency of components always results in higher demands on production engineering, against the background of the generally increasing cost press... The continuous constructive challenge to improve the functionality and efficiency of components always results in higher demands on production engineering, against the background of the generally increasing cost pressure. In many cases, you will just succeed in producing competitive and innovative products by combining and coupling of different procedures to an independent (hybrid) technology. The use of hybrid procedures for metal joining and heat treatment of metallic materials finds more and more industrial fields of application. Modern vacuum lines with integrated pressurized gas quenching are considered high-performance and flexible means of production for brazing and heat treatment tasks as well in the turbine industry as in the mould making and tool manufacturing industry. In doing so, the heat treatment is coupled with the brazing cycle in a combined process so that the brazing temperatures and soak times are adapted to the necessary temperatures and times for solution heat treatment and austeniting. This user-oriented article describes on the one hand examples of brazing of turbine components, but above all the practical experience from the plastics processing industry, where the requirement for a high-efficient cooling of injection moulding dies gains more and more importance. The combined procedure "Vacuum Brazing and Hardening" offers plenty of possibilities to produce mould inserts with an efficient tempering system in an economic way. 展开更多
关键词 真空焊接 热处理 金属连结 气体流淬火
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Methodological Framework for a Multi-Scale Study on Hydrological Processes and Soil Erosion in Subtropical Southeast China 被引量:8
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作者 H. ZEPP TANG Jia-Liang ZHANG Bin 《Pedosphere》 SCIE CAS CSCD 2005年第6期695-706,共12页
This paper introduces and illustrates the concepts of geoecological process combinations and geographical or landscape dimensions by outlining the methodology of a Sino-German cooperative project in Southeast China an... This paper introduces and illustrates the concepts of geoecological process combinations and geographical or landscape dimensions by outlining the methodology of a Sino-German cooperative project in Southeast China and presents the first results of the modelling process for the catchment scale. The project equipped a catchment in subtropical Southeast China from plot scale to catchment scale in order to study the hydrological and soll erosion processes. Distinct spatial differences in principal water and soil material fluxes were quantified. Deep drainage peaks occurred in May, June and July and even in August and November. Measurements in erosion plots as well as sedimentary deposits revealed that there was soil erosion connected with overland flow. Consistent with the results from the regular catenary variations of soil colors, textural stratification and hydrograph analysis, there was also a clear indication of interflow from measured soil moisture data. The experimental set up has the potential to further deepen the understanding of small-scale processes involved in lateral water fluxes and soil erosion. The expected results and interpretations will lead to a further integration of the collected data. In the future, to understand matter transfer in and between landscape ecological units, agricultural influence on nutrient status and flux data will be incorporated. 展开更多
关键词 CATCHMENT geoecological process combination landscape ecology soil erosion
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Preparation of single-phase ammonium dimolybdate by combination process 被引量:3
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作者 ZHANG Bao XIA Xiaomei LI Qian 《Rare Metals》 SCIE EI CAS CSCD 2012年第5期517-522,共6页
A novel method for the preparation of single-phase ammonium dimolybdate with industrial ammonium molybdate was studied. Various in- fluential factors were evaluated in the paper, including reaction temperature, reacti... A novel method for the preparation of single-phase ammonium dimolybdate with industrial ammonium molybdate was studied. Various in- fluential factors were evaluated in the paper, including reaction temperature, reaction time, initial molybdenum concentration, initial NH_3 /Mo molar ratio, and stirring speed. Under the optimum experimental conditions, the crystallization rate of product is 85.23%. The X-ray diffraction (XRD) analysis and chemical analysis show that the product is single-phase ammonium dimolybdate, and no impurity phases exist. The scanning electronic microscope (SEM) image reveals uniform particle size, good particle dispersion, and no agglomeration between particles. Meanwhile, the final pH value of acidification was investigated. The total molybdenum recovery can reach up to 99.40%, and the main phases of acidification product are the same as those of raw material with the final pH value of 1.5. This determines that the acidification product can be used as a raw material to produce single-phase ammonium dimolybdate. 展开更多
关键词 single-phase ammonium dimolybdate combination process crystallization rate phase composition total molybdenum recovery
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Effects of Combined Instantaneous High-Pressure and MediumTemperature on the Retention of Total Vitamin Cin Wax Gourd Juices 被引量:2
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作者 LIUJin-jie WANGWu +2 位作者 ZHANGLi HEJing-min CHENCong-gui 《Agricultural Sciences in China》 CAS CSCD 2003年第8期919-923,共5页
Based on the instantaneous high-pressure(IHP)produced by high-pressure single pole-cylinder pump, the effects of combining this pressure with medium temperature on the retention of total vitamin C(Vc)in wax gourd juic... Based on the instantaneous high-pressure(IHP)produced by high-pressure single pole-cylinder pump, the effects of combining this pressure with medium temperature on the retention of total vitamin C(Vc)in wax gourd juices were investigated under 20 - 80 MPa, 35 - 58℃, pH 3. 0 - 6. 0 and processing time 0-8 min. Results showed that the loss of Vc increased with elevated processing temperatures(50 MPa, 4 min). When the temperature of raw juices was 35℃, the retention of total Vc was higher under 40 - 60 MPa than that under the pressure < 40 MPa or > 60 MPa, and it was up to 94%(4 min). The retention of total Vc decreases slowly within 6 min, but rapidly after 6 min. The pH can also influence the retention of total Vc, and this retention can come to a highest point at pH 6.0. 展开更多
关键词 Instantaneous high-pressure Medium temperature combined process Vitamin C RETENTION
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Effects of Combined Instantaneous High-Pressure and Medium Temperature on Peroxidase Activity in Wax Gourd Juices 被引量:1
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作者 CHEN Cong gui, WANG Wu, ZHANG Li, FANG Hong mei and HE Jing min (School of Biology and Food Engineering, Hefei University of Technology, Hefei 230061, P.R.China) 《Agricultural Sciences in China》 CAS CSCD 2003年第9期1030-1034,共5页
Based on the instantaneous pressurization and depressurization produced by high pressure single pole cylinder pump and valve, the effects of the continuous processing on the peroxidase (POD) activity in wax gourd ju... Based on the instantaneous pressurization and depressurization produced by high pressure single pole cylinder pump and valve, the effects of the continuous processing on the peroxidase (POD) activity in wax gourd juices were investigated. Results showed that the processing factors such as pressure, temperature, pH and processing time are important to the POD activity. POD in crude juices could be inactivated apparently above 50 MPa(pH 4.6, 35℃, 4 min), and activated at 20 MPa ( P < 0.01). Its remarkable inactivation could also be observed at 45 and 55℃ (20 MPa, pH 4.6, 4 min), and the evident activation appears at the material temperature 35℃ ( P < 0.01). The pH 3.0 could destroy POD almost completely (20 MPa, 35℃, 4 min), while pH 6.0 could not influence apparently the POD activity in crude juices( P > 0.05). In addition, the rules of POD activity along with the treatment time are variational under different processing pressures. The higher the treating pressure is, the shorter the processing time is needed to inactivate POD. 展开更多
关键词 Instantaneous high pressure Medium temperature combined process POD ACTIVITY
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Dechlorination by combined electrochemical reduction and oxidation
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作者 丛燕青 吴祖成 谭天恩 《Journal of Zhejiang University-Science B(Biomedicine & Biotechnology)》 SCIE EI CAS CSCD 2005年第6期563-568,共6页
Chlorophenols are typical priority pollutants listed by USEPA (U.S. Environmental Protection Agency). The removal of chlorophenol could be carried out by a combination of electrochemical reduction and oxidation method... Chlorophenols are typical priority pollutants listed by USEPA (U.S. Environmental Protection Agency). The removal of chlorophenol could be carried out by a combination of electrochemical reduction and oxidation method. Results showed that it was feasible to degrade contaminants containing chlorine atoms by electrochemical reduction to form phenol, which was further degraded on the anode by electrochemical oxidation. Chlorophenol removal rate was more than 90% by the combined electro- chemical reduction and oxidation at current of 6 mA and pH 6. The hydrogen atom is a powerful reducing agent that reductively dechlorinates chlorophenols. The instantaneous current efficiency was calculated and the results indicated that cathodic reduction was the main contributor to the degradation of chlorophenol. 展开更多
关键词 Electrochemical reduction Electrochemical oxidation DECHLORINATION combined process
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Heuristic Method for Job Shop Scheduling Problem with Combination Processing
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作者 YI Ping LI Jian-jun XIONG He-gen 《Computer Aided Drafting,Design and Manufacturing》 2009年第1期56-63,共8页
A job shop scheduling problem with a combination processing in complex production environment is proposed. Based on the defining of "non-elastic combination processing relativity" and "virtual process", the proble... A job shop scheduling problem with a combination processing in complex production environment is proposed. Based on the defining of "non-elastic combination processing relativity" and "virtual process", the problem can be simplified and transformed to a traditional one. On the basis of the dispatching rules select engine and considered factors of complex production environment, a heuristic method is designed. The algorithm has been applied to a mould enterprise in Shenzhen for half a year. The practice showed that by using the method suggested the number of delayed orders was decreased about 20% and the productivity was increased by 10 to 20%. 展开更多
关键词 combination processing relativity dispatching rules select engine heuristic method
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油水分离技术的研究进展 被引量:1
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作者 陈明功 周鑫 +2 位作者 赵彬彬 荣俊锋 路延 《现代化工》 CAS CSCD 北大核心 2024年第1期63-67,共5页
综述了含油废水的定义、油的存在形态、油水分离技术以及吸油材料的研究进展。油水分离技术包括物理分离法、化学分离法、物理化学分离法以及组合工艺等。阐述了各种油水分离技术的基本原理、流程和特点,综合比较分析发现,应依据含油废水中... 综述了含油废水的定义、油的存在形态、油水分离技术以及吸油材料的研究进展。油水分离技术包括物理分离法、化学分离法、物理化学分离法以及组合工艺等。阐述了各种油水分离技术的基本原理、流程和特点,综合比较分析发现,应依据含油废水中油品的性质及存在形式选择合适的油水分离技术,并且兼顾经济效益。组合工艺是油水分离的发展趋势;高性能低成本油水分离材料以及油水分离设备的研发是未来油水分离技术发展的重点。 展开更多
关键词 含油废水 污染 分离 技术特点 组合工艺
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组合赋权法在卷烟机综合性能评价中应用
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作者 严志景 张劲 +6 位作者 徐尚军 丁乃红 王鹏 邵名伟 何金华 曹海兵 杨文志 《中国烟草学报》 CAS CSCD 北大核心 2024年第1期19-27,共9页
【目的】客观准确地评价卷烟机设备性能,从质量水平、消耗水平和效能水平3个维度出发,构建设备综合性能评价指标体系和组合赋权评价模型。【方法】利用最大熵原理给出最优组合系数和方案评价计算步骤。开展Topsis方法、层次分析法、熵... 【目的】客观准确地评价卷烟机设备性能,从质量水平、消耗水平和效能水平3个维度出发,构建设备综合性能评价指标体系和组合赋权评价模型。【方法】利用最大熵原理给出最优组合系数和方案评价计算步骤。开展Topsis方法、层次分析法、熵值法和组合赋权法在卷烟机设备综合性能评价的实例分析和比较工作。【结果】4种方法具有显著正相关关系,评价结果满足一致性。组合赋权法与其他评价方法相比具有最优组合系数和误差平方和小优势。 展开更多
关键词 层次分析法 熵值法 组合赋权法 综合评价模型
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铜火法冶炼废水处理实践
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作者 张煜 李俊杰 +1 位作者 葛哲令 易小艺 《有色金属(冶炼部分)》 CAS 北大核心 2024年第2期111-117,共7页
阐述了铜冶炼火法工艺发展状况,剖析了铜冶炼过程产生废水的主要环节,并对废水处理工艺及原理进行了梳理,分析了某铜冶炼企业废水产生节点、产生特点和组成成分;针对现有的废水处理技术和资源化利用提出了合理的建议。特别阐述了阳谷祥... 阐述了铜冶炼火法工艺发展状况,剖析了铜冶炼过程产生废水的主要环节,并对废水处理工艺及原理进行了梳理,分析了某铜冶炼企业废水产生节点、产生特点和组成成分;针对现有的废水处理技术和资源化利用提出了合理的建议。特别阐述了阳谷祥光铜业自主研发的旋浮铜冶炼技术、粗铜自氧化还原精炼技术、平行流电解技术,“硫化+石膏+中和”工艺和废水深度处理联合工艺特点,对采用火法冶炼工艺的铜冶炼企业的废水处理及资源化利用具有借鉴意义。 展开更多
关键词 联合工艺 铜冶炼 火法 资源化利用
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金矿选矿技术研究进展
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作者 胡瑞彪 张璐 张建刚 《现代矿业》 CAS 2024年第8期158-161,共4页
为助力国内金矿选矿技术攻关,实现金矿资源的高效、合理化开发利用,通过梳理国内金矿资源分布情况及典型黄金矿山的重选法、浮选法、联合工艺和预处理选矿工艺的研究现状,针对性地总结了含碳高砷、高硫、难处理金矿的研究方向,为实现难... 为助力国内金矿选矿技术攻关,实现金矿资源的高效、合理化开发利用,通过梳理国内金矿资源分布情况及典型黄金矿山的重选法、浮选法、联合工艺和预处理选矿工艺的研究现状,针对性地总结了含碳高砷、高硫、难处理金矿的研究方向,为实现难选金矿资源的高效、合理化开发利用提供了思路。 展开更多
关键词 金矿 重选法 浮选法 联合工艺 预处理工艺
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生态沟改良技术及组合工艺净化效果分析
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作者 陈欣 杜青平 +1 位作者 林宇 王婉莹 《环境生态学》 2024年第8期49-52,63,共5页
生态沟是一种经济高效、广泛应用于农业面源污染治理的方法,主要由植物、基质和排水沟构成。本研究重点分析了水生植物、微生物、基质、水体流速和水位等环境因子对生态沟净化效果的影响,并梳理了国内外生态沟的改良技术及组合工艺。结... 生态沟是一种经济高效、广泛应用于农业面源污染治理的方法,主要由植物、基质和排水沟构成。本研究重点分析了水生植物、微生物、基质、水体流速和水位等环境因子对生态沟净化效果的影响,并梳理了国内外生态沟的改良技术及组合工艺。结果表明,经过结构改良的二级生态沟和沸石屏障生态沟显著提高了总磷、总悬浮物和氨氮的去除效果;几种生态沟的组合工艺能够增强对污水的净化能力,优化生态景观,并且能将碳转化为有机物积累在基质或者生物体内,具有碳汇效应,有助于实现双碳目标。研究结论可为生态沟与其他工艺组合、应用范围的拓展以及工程实践提供参考依据。 展开更多
关键词 生态沟 影响因素 组合工艺 净化效果
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