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Study on the Genetics and Development of Fiber Pigments and Color Deviation After Wetting Process of Naturally Colored Cotton 被引量:4
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作者 QIUXin-mian ZHOUWen-long 《Agricultural Sciences in China》 CAS CSCD 2003年第4期377-383,共7页
The genetic control of fiber pigment color in naturally colored cotton was studied. The expression of brown and green fiber color was controlled by incompletely dominant single genes and incompletely dominant major ge... The genetic control of fiber pigment color in naturally colored cotton was studied. The expression of brown and green fiber color was controlled by incompletely dominant single genes and incompletely dominant major genes, respectively. Production and accumulation of the fiber pigment were related to special expression of enzymatic genes for pigment synthesis in fiber cells. At the stage of fiber lengthening, naturally colored cotton, like white cotton, appeared purely white. But when fiber cell walls entered the thickening stage, pigment appeared by degrees. When the fiber was completely matured (on boll dehiscence), the color reached its darkest level. After wetting process treatment, the hues of the fiber pigment changed in regular patterns. The hue circle for brown and green cotton changed in the opposite direction with wetting process treatment. In general, the treated cotton color and luster became dark and vivid, and this trend provided the possibility for enhancing the fiber quality by suitable environmental friendly finishing. The analysis showed that the color and luster of the cotton may be controlled by a series of pigments which show different chemical performance. 展开更多
关键词 Naturally colored cotton Fiber pigment GENETICS wetting process
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Process simulation and optimization of flow field in wet electrostatic precipitator 被引量:6
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作者 YE Xing-lian WANG Shuai +3 位作者 ZHANG Hao AN Xi-zhong GUO Bao-yu LI Li-feng 《Journal of Central South University》 SCIE EI CAS CSCD 2020年第1期132-143,共12页
To improve the dust removal performance of the wet electrostatic precipitator(WESP), a flow field optimization scheme was proposed via CFD simulation in different scales. The simplified models of perforated and collec... To improve the dust removal performance of the wet electrostatic precipitator(WESP), a flow field optimization scheme was proposed via CFD simulation in different scales. The simplified models of perforated and collection plates were determined firstly. Then the model parameters for the resistance of perforated and collection plates, obtained by small-scale flow simulation, were validated by medium-scale experiments. Through the comparison of the resistance and velocity distribution between simulation results and experimental data, the simplified model is proved to present the resistance characteristics of perforated and collection plates accurately. Numerical results show that after optimization, both the flow rate and the pressure drop in the upper room of electric field regions are basically equivalent to those of the lower room, and the velocity distribution in flue inlet of WESP becomes more uniform. Through the application in practice, the effectiveness and reliability of the optimization scheme are proved, which can provide valuable reference for further optimization of WESP. 展开更多
关键词 process simulation OPTIMIZATION flow field wet electrostatic precipitator perforated plate collection plate
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Simulation of Wetting and Drying Processes in A Depth Integrated Shallow Water Flow Model by Slot Method 被引量:2
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作者 袁德奎 孙健 李小宝 《China Ocean Engineering》 SCIE EI 2008年第3期491-502,共12页
A particular porosity method named "slot method" is implemented in a depth-integrated shallow water flow model (DIVAST) to simulate wetting and drying processes. Discussed is the relationship between the shape fac... A particular porosity method named "slot method" is implemented in a depth-integrated shallow water flow model (DIVAST) to simulate wetting and drying processes. Discussed is the relationship between the shape factors of the "slot" and the preset depth used in "wetting-drying" algorithm. Two typical tests are conducted to examine the performance of the method with the effect of the shape factors of the "slot" being checked in detail in the first test. Numerical results demonstrate that: 1 ) no additional effort to improve the finite difference scheme is needed to implement "slot method" in DIVAST, and 2) "slot method" will simulate wetting and diying processes correctly if the shape factors of the "slot" being selected properly. 展开更多
关键词 wetting and drying processes shallow water flow slot method wetting-drying algorithm tidal fiat
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Optimization of Wickerhamomyces anomalus Fermentation Conditions for Pectinase Production Based on Wet Processing of Arabica Coffee in Yunnan Province 被引量:2
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作者 ZHANG Shu-zhu MENG Jin +6 位作者 XUE Xiao-ran KONG De-ting TIE Li-ping HUANG Jia-xiong QIN Shi-wen HE Fei-fei SUO Yu-kai 《Agricultural Science & Technology》 CAS 2022年第3期30-39,共10页
In order to improve the pectin-degrading efficiency in wet processing of Arabica coffee in Yunnan, Box-Behnken design and single factor experiment were used to optimize the fermentation conditions of five pectinolytic... In order to improve the pectin-degrading efficiency in wet processing of Arabica coffee in Yunnan, Box-Behnken design and single factor experiment were used to optimize the fermentation conditions of five pectinolytic Wickerhamomyces anomalus strains from the fermentation broth of Arabica coffee in Baoshan, Yunnan during wet processing with pectase activity as an indicator. The results showed that the five strains all synthesized pectin lyase(PL), polygalacturonase(PG), and pectin methylesterase(PM).Among them, strain CAP5 had strong ability to produce PG and PL,while strain CAP4 secreted a large amount of PM. Under optimized conditions, the activity of PG, PL, and PM of the five strains came in at 250.17~411.20 U/mL, 12.98~16.55 U/mL, and 208.52~322.83 U/mL,respectively. The four factors of nitrogen source concentration,fermentation time, Mn2+ concentration, and pH value were optimized and the optimal pectinase-producing fermentation conditions for five strains were as follows: peptone 2.2 g/L, fermentation time 30 h, Mn2+ 1.5 mmol/L, and pH 4.3. After fermentation under the optimized conditions, the maximum PG activity of CAP5 amounted to 411.20 U/mL, 114.03% higher than that before optimization.Meanwhile, the PG activity of strains CAP3, CAP4, CAP8, and CAP10 increased by 86.74%, 114.55%, 65.79%, and 66.07%,respectively, and the activity of PL and PM of the five strains rose 150.35%~218.56% and 341.07%~418.52%, respectively. These findings suggested that W. anomalus strains could be used as coffee starter and had great potential for the lysis of pectin. 展开更多
关键词 Wickerhamomyces anomalus COFFEE wet processing PECTINASE Box–Behnken design
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Wet flue gas desulfurization performance of 330 MW coal-fired power unit based on computational fluid dynamics region identification of flow pattern and transfer process 被引量:1
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作者 Jiangyuan Qu Nana Qi +2 位作者 Kai Zhang Lifeng Li PengchengWang 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2021年第1期13-26,共14页
Wet Flue Gas Desulfurization(WFGD)unit based upon spray scrubber has beenwidely employed to control SO_(2) emissions from flue gas in coal-fired power plant.To clarify the dependence of desulfurization performance on ... Wet Flue Gas Desulfurization(WFGD)unit based upon spray scrubber has beenwidely employed to control SO_(2) emissions from flue gas in coal-fired power plant.To clarify the dependence of desulfurization performance on inter-phase transfer behaviors with non-ideal contacting patterns of flue gas and slurry droplets,three regions in spray scrubber are distinguished in terms of gas-slurry flow structures using CFD method in the Eulerian-Lagrangian framework.A comprehensive model is established by involving the transfer process between two phases and chemical reactions in aqueous phase,which is validatedwith the measured data froma WFGD scrubber of 330 MW coal-fired power unit.Numerical results show that the overall uniformity degree of flue gas in whole scrubber is largely determined by the force-balanced droplets in the middle part of scrubber,which is dominated by counter-current mode.Both momentum transfer behavior and SO_(2) chemical absorption process present the synchronicity with the evolution of gas-slurry flow pattern,whilst the heat transfer together with H_(2)O evaporation has little effect on overall absorption process.Three regions are firstly defined as Gas Inlet Region(GIR),Dominant Absorption Region(DAR)and Slurry Dispersed Region(SDR)from the bottom to top of scrubber.SO_(2) is mainly scrubbed in DAR,which provides much more intensive interaction between two phases compared to GIR or SDR.A better understanding of the desulfurization process is obtained from the fundamental relationship between transport phenomena and chemical reactions based upon the complicated hydrodynamics of gas-slurry two-phase flow,which should be useful for designing and optimizing the scrubber in coal-fired power unit. 展开更多
关键词 wet flue gas desulfurization Gas-liquid flow Eulerian-Lagrangian model Flow pattern Transport processes ABSORPTION
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Fabric Wetting and Wicking Measurement Based on Dynamic Image Acquisition and Processing 被引量:1
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作者 张瑞云 潘宁 姜福青 《Journal of Donghua University(English Edition)》 EI CAS 2010年第4期544-550,共7页
After a brief review of existing methods for fabric wetting and wicking measurement,a new numerical approach based on dynamic image acquisition and analysis was proposed to study the liquid wetting and wicking propert... After a brief review of existing methods for fabric wetting and wicking measurement,a new numerical approach based on dynamic image acquisition and analysis was proposed to study the liquid wetting and wicking properties of woven fabrics.A measuring system was first developed to record on-site the images of liquid ascending in fabrics for a certain period of time.The hardware and software platforms and the experimental methods were described,and the image processing and analysis as well as other related algorithms were discussed in detail.The liquid front curves and rising rates in wetting and wicking were eventually obtained towards different fabrics.From liquid wicking curves,relationship between liquid ascending height and liquid ascending time agrees well with the Washburn theory.The data comparison between the numerical measurement and the traditional test proves the reliability of the numerical results. 展开更多
关键词 wetting and wicking image processing woven fabric image dynamic acquisition
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Characteristics of coal sludge slurry prepared by a wet-grinding process 被引量:3
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作者 Ma Shaolian Wu Guoguang +4 位作者 Meng Xianliang Zhou Rui Chu Ruizhi Miao Zhenyong Qi Yueming 《International Journal of Mining Science and Technology》 SCIE EI CSCD 2016年第5期947-953,共7页
Coal sludge slurry(CSS) is an alternative fuel and a potential competitive method for sludge reduction.Based on the researches of coal water slurry, we studied CSSs by using a wet-grinding process with different types... Coal sludge slurry(CSS) is an alternative fuel and a potential competitive method for sludge reduction.Based on the researches of coal water slurry, we studied CSSs by using a wet-grinding process with different types of regional municipal sludge(sludge) in an orthogonal experiment. The sludge type,sludge mixing proportion, dosage of dispersant, and grinding time were tested in this study. The results show that water content and its occurrence characteristics in the sludge have primary hindering influences on slurry ability. The range of fixed-viscosity concentrations with raw wet sludge is from 50.78%to 44.40%(by weight), while the range is from 53.35% to 51.51%(by weight) with dry sludge. All of the CSSs exhibit shear-thinning behaviors with different variation trends, especially the CSSs with more than 15%(by weight) raw wet sludge in it. Adding the same proportion of raw wet sludge increases the thixotropic properties of CSSs and the highest area of thixotropy loop is 3065 Pa/s, while the highest value of dry sludge is 1798 Pa/s. Hydrophilic group plays an important role in adsorbing water and building three-dimension networks with other particles, which is the main reason for CSS properties.Therefore, the mechanism can be used to find the way for making high quality CSS. 展开更多
关键词 Coal sludge slurry Municipal sludge wet-grinding process Fixed-viscosity concentration Hydrophilic groups
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Distribution of REE of Phosphate Concentrate in Wet-Phosphoric Acid Process 被引量:2
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作者 金会心 李军旗 +1 位作者 王华 毛小浩 《Journal of Rare Earths》 SCIE EI CAS CSCD 2007年第S1期78-84,共7页
There exists the most important REE-bearing phosphorite deposit in Southwest of China. Due to the fact that the REE are present in the form of ions in the lattices of collophanite or carbonatfluorapatite, the REE can ... There exists the most important REE-bearing phosphorite deposit in Southwest of China. Due to the fact that the REE are present in the form of ions in the lattices of collophanite or carbonatfluorapatite, the REE can be enriched in phosphate concentrate by flotation method. The phosphate concentrate is the main raw materials to produce phosphoric acid, therefore, it is significant to further investigate the distribution rule of REE in wet process. In this paper, the single leaching and recycled leaching technology were carried out to investigate the effect of various parameter conditions on distribution of REE in products. The REE compositions of products were analyzed by Inductively Coupled Plasma Emission Mass Spectrometry (ICP-MS) method. It was found that the acidic value of leaching liquor was the main effect factor on the distribution of REE in products. In single leaching stage, P2O5 concentration of leaching liquor slightly varied from 8% to about 10% when the excessive coefficient of sulphuric acid ranged from 1.03 to 1.05, and the distribution proportions of ∑REO in phosphoric acid solution was lower than 40%. However, in recycled leaching process(the condition similar to practical wet process), with an increase of P2O5 concentration as well as the acidic value of leaching liquor, the distribution proportions of ∑REO in phosphoric acid solution could be decreased to 2.56%. That is to say that under the condition similar to practical wet process, more than 90% of REE of phosphate concentrate became precipitation entering into the phosphogypsum product. This investigation will provide valid reference for reasonably recovering or reserving REE in wet-phosphoric acid process. 展开更多
关键词 wet-phosphoric acid process distribution of REE single leaching recycled leaching rare earths
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Response of Freezing/Thawing Indexes to the Wetting Trend under Warming Climate Conditions over the Qinghai–Tibetan Plateau during 1961–2010:A Numerical Simulation 被引量:2
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作者 Xuewei FANG Zhi LI +5 位作者 Chen CHENG Klaus FRAEDRICH Anqi WANG Yihui CHEN Yige XU Shihua LYU 《Advances in Atmospheric Sciences》 SCIE CAS CSCD 2023年第2期211-222,共12页
Since the 1990s,the Qinghai–Tibetan Plateau(QTP)has experienced a strikingly warming and wetter climate that alters the thermal and hydrological properties of frozen ground.A positive correlation between the warming ... Since the 1990s,the Qinghai–Tibetan Plateau(QTP)has experienced a strikingly warming and wetter climate that alters the thermal and hydrological properties of frozen ground.A positive correlation between the warming and thermal degradation in permafrost or seasonally frozen ground(SFG)has long been recognized.Still,a predictive relationship between historical wetting under warming climate conditions and frozen ground has not yet been well demonstrated,despite the expectation that it will become even more important because precipitation over the QTP has been projected to increase continuously in the near future.This study investigates the response of the thermal regime to historical wetting in both permafrost and SFG areas and examines their relationships separately using the Community Land Surface Model version 4.5.Results show that wetting before the 1990s across the QTP mainly cooled the permafrost body in the arid and semiarid zones,with significant correlation coefficients of 0.60 and 0.48,respectively.Precipitation increased continually at the rate of 6.16 mm decade–1 in the arid zone after the 1990s but had a contrasting warming effect on permafrost through a significant shortening of the thawing duration within the active layer.However,diminished rainfall in the humid zone after the 1990s also significantly extended the thawing duration of SFG.The relationship between the ground thawing index and precipitation was significantly negatively correlated(−0.75).The dual effects of wetting on the thermal dynamics of the QTP are becoming critical because of the projected increases in future precipitation. 展开更多
关键词 freezing/thawing indexes numerical modeling wetting process frozen ground Qinghai–Tibetan Plateau
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PHASE SEPARATION AND MICROVOID FORMATION AT PHASE INTERFACES OF HYDROPHOBIC-HYDROPHILIC POLYMER BLENDS DURING WET PROCESSING
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作者 郑亚国 周鈜 《Journal of Donghua University(English Edition)》 EI CAS 1989年第Z1期119-124,共6页
In this paper,morphological structure,thermodynamic compatibility and relationship be-tween porosities and blend ratios of the wet coagulated PU/PVA sheets were studied by meansof observation of scanning electronic mi... In this paper,morphological structure,thermodynamic compatibility and relationship be-tween porosities and blend ratios of the wet coagulated PU/PVA sheets were studied by meansof observation of scanning electronic micrographies,tests of dynamic mechanical properties,moisture regain and vapor permeability.Furthermore,the formation of microvoids at interfacesof separated phases was discussed and a microvoid formation mechanism at phase interfaces ofhydrophobic-hydrophilic blends was suggested and compared with that ofhydrophobic-hydrophobic blends. 展开更多
关键词 phase separation interface HYDROPHOBIC HYDROPHILIC POLYURETHANE polyvinyl ALCOHOL wet process porosity microvoid polymer BLEND
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Energy and Cost Analysis of Cement Production Using the Wet and Dry Processes in Nigeria
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作者 Olayinka S. Ohunakin Oluwafemi R. Leramo +2 位作者 Olatunde A. Abidakun Moradeyo K. Odunfa Oluwafemi B. Bafuwa 《Energy and Power Engineering》 2013年第9期537-550,共14页
The study evaluates the energy consumption of both wet and dry processes cement manufacturing plant in Nigeria. Enrgy consumption data collected for the period 2003 to 2011 were used to estimate the energy consumption... The study evaluates the energy consumption of both wet and dry processes cement manufacturing plant in Nigeria. Enrgy consumption data collected for the period 2003 to 2011 were used to estimate the energy consumption of the crushing, milling, agitation, burning, grinding and bagging operations. The total energy evaluation was based on the three primary energy sources which include electrical, combustion and human. The total estimated energy intensities were 6545 MJ/ton and 4197 MJ/ton for wet and dry processes respectively. The percentage consumption of energy in each operation is 93.68 and 90.34% (burning), 2.11 and 4.33% (milling), 0.43 and 0.67% (crushing), 1.39 and 0% (agitation), 2.12 and 3.90% (grinding), and 0.27 and 0.75% (bagging) of the total energy inputs for the wet and dry processes respectively. Furthermore, the average total energy cost of production showed that wet process is approximately 40% more cost intensive in cement production than the dry process while at the same time it is cost effective to run production on energy through gas powered plant than the national grid. 展开更多
关键词 wet process Dry process CEMENT CRUSHING MILLING NIGERIA
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Study on Function of Rare Earth During Producing Phosphate Fertilizer by Wet Process
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作者 Wang Jiachen Liu Xiangsheng Yang Jun Fan Yubin Wu Yanping 《Journal of Rare Earths》 SCIE EI CAS CSCD 2004年第z1期261-264,共4页
The impacts of the Rare Earth (RE) on the contents of available Phosphorus (P) and the physical character of the calcium superphosphate produced by the wet process on the basis of simulating the consumption of concent... The impacts of the Rare Earth (RE) on the contents of available Phosphorus (P) and the physical character of the calcium superphosphate produced by the wet process on the basis of simulating the consumption of concentrated sulphuric acid, the slurry concentration and the cure conditions in different wet process were studied in laboratory, and the results show that adding RE into different wet process does not raise available P, but changes its physical character,for example, the composite is loose and the color is offwhite. 展开更多
关键词 RARE EARTH PHOSPHATE fertilizer wet process physical characteristics available P
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Research on the application of the wet scrubber on the BSSF slag processing system at Baosteel
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作者 LI Yongqian LIU Yin XIAO Yongli 《Baosteel Technical Research》 CAS 2009年第3期38-40,共3页
Based on the analysis results of the dust size distribution of flue gas from Baosteel's short-flow (BSSF) slag processing system and the mechanism of the wet scrubber,a wet scrubber system was designed and installe... Based on the analysis results of the dust size distribution of flue gas from Baosteel's short-flow (BSSF) slag processing system and the mechanism of the wet scrubber,a wet scrubber system was designed and installed in the No. 1 BSSF slag processing system at Baosteel. The results show that the dust removal efficiency of the previous system that had conventional water nozzles was only 69% with a liquid-gas ratio of 0.79 L/m^3 ,while the dust removal efficiency reached 94% when three sets of high-efficiency dual phase spray guns were installed inside both the flue and the chimney. For the latter system,the liquid-gas ratio was 0. 84 L/m^3 ,and the dust concentration in the cleaned emissions reduced to less than 40 mg/m^3. 展开更多
关键词 slag processing wet scrubber NOZZLE particle size distribution dust removal efficiency
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THERMAL PROCESS OF VACUUM FLUXLESS LASER SOLDERING AND ANALYSIS ON SOLDER SPREADING AND WETTING
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作者 Wang Chunqing Li Mingyu +1 位作者 SunFujiang Feng Wufeng (National key laboratory of welding, Harbin Institute of Technology) 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2000年第2期127-133,共7页
In order to study the mechanism of vacuum fluxless soldering on the conditions of laser heating, the method of measuring temperature by the thermocouple is used to analyze the spreading and wetting process of both flu... In order to study the mechanism of vacuum fluxless soldering on the conditions of laser heating, the method of measuring temperature by the thermocouple is used to analyze the spreading and wetting process of both fluxless Sn-Pb solder in the vacuum surroundings and flux Sn-Pb solder on Cu pad. Solder spreading and wetting affected by the soldering thermal process is also discussed according to the thermodynamics principle. Results show that vacuum fluxless soldering demands higher temperature, and the fall of the solder surface tension is the important factor achieving fluxless laser soldering. 展开更多
关键词 Fluxless soldering Soldering thermal process Spreading and wetting
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Wet Coffee Processing Discharges Affecting Quality of River Water at Kayanza Ecological Zone, Burundi
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作者 Emile Bisekwa Paul M. Njogu Taye Kufa-Obso 《Open Journal of Applied Sciences》 2021年第6期707-721,共15页
Wet coffee processing leads to the generation of large volumes of wastewater, whose discharge to the environment leads to pollution of freshwater bodies. Kayanza is a major coffee growing area in Burundi with more tha... Wet coffee processing leads to the generation of large volumes of wastewater, whose discharge to the environment leads to pollution of freshwater bodies. Kayanza is a major coffee growing area in Burundi with more than 40 wet coffee processing factories (WCPF) that discharge effluents directly to receiving water bodies without treatment. This study was carried out to assess the effect of coffee wastewater on the physicochemical properties of receiving waterbodies in Kayanza coffee growing ecological zone. Currently, no study has been done to analyze the effluent from the WCPF and assess the level of pollution. This study will therefore provide valuable data on the water pollution from coffee processing plants. Ten (10) rivers in the Kayanza coffee growing zone were studied during the months of April and June, 2020. Water samples were collected upstream (U) and downstream (D) of the effluent discharge points in triplicate. Samples were analyzed for pH, Chemical Oxygen Demand (COD), Biochemical Oxygen Demand (BOD<sub>5</sub>), Temperature, Salinity, Electrical Conductivity (EC), Total Dissolved Solids (TDS), Dissolved Oxygen (DO), Total Suspended Solids (TSS), Nitrates, Nitrites, Lead (Pb), Copper (Cu), Chlorides and Ammonium ions using standard methods. <span style="letter-spacing:0.1pt;">Ph</span>ysical parameters were analyzed in situ whereas chemical param<span style="letter-spacing:0.1pt;">eters w</span><span style="letter-spacing:-0.05pt;">ere analy</span>zed in the laboratories in Burundi Institute of Agricultural Science<span style="letter-spacing:0.1pt;">s</span> (ISA<span style="letter-spacing:-0.2pt;">BU) and University of Burundi. Data were analyzed u</span>sing R-studio-1.0.153, GenStat 64-bit Release 14.1 and SSPS. Results on the physicochemical parameters indicated that coffee factory effluent has a polluting potential during coffee processing peak. The concentrations of the physicochemical parameters were significantly (p < 0.05) higher downstream (D) compared to upstream (U) of the river water sampling points. All downstream sites had COD, BOD<sub>5</sub>, TSS and pH values above allowable limits set by WHO and Burundi. The polluting impact of public wet coffee processing factories was significantly higher than that of private and cooperatives owned factories (p < 0.05). Measures should be taken in order to protect water bodies. 展开更多
关键词 Wastewater Water Pollution Kayanza Zone wet Coffee processing
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Short wet-steam dyeing process of cotton fabrics with reactive dyes 被引量:1
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作者 SUN Fu-yun WANG Zhao-feng FANG Kuan-jun 《科技视界》 2017年第34期38-39,共2页
The effects of Reactive Black 5 utilized to cotton fabrics by short wet-steam process on the dyeing properties were investigated. This study will provide a theoretical reference for short wet-steam process of cotton f... The effects of Reactive Black 5 utilized to cotton fabrics by short wet-steam process on the dyeing properties were investigated. This study will provide a theoretical reference for short wet-steam process of cotton fabrics with bifunctional reactive dyes. The optimal amount of Selilao agent was 20 g/L, while the soaping and rubbing fastness of the dyed cotton fabrics were both reached to 4-5 rating. 展开更多
关键词 wet-steam
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锌浮渣干湿法处理工艺对比与干法处理工艺关键设备选型及应用 被引量:1
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作者 陈向强 宋言 《有色设备》 2024年第1期86-93,共8页
在湿法炼锌的工业生产中,电解阴极锌片在熔锌感应电炉内熔化除杂时产出副产品锌浮渣,锌浮渣中含锌约80%,其中70%以上锌以单质形态存在。本文对比了干法和湿法两种处理工艺的优缺点,重点介绍了干法处理工艺中关键设备选择和能力计算,并... 在湿法炼锌的工业生产中,电解阴极锌片在熔锌感应电炉内熔化除杂时产出副产品锌浮渣,锌浮渣中含锌约80%,其中70%以上锌以单质形态存在。本文对比了干法和湿法两种处理工艺的优缺点,重点介绍了干法处理工艺中关键设备选择和能力计算,并结合实际生产情况对投产后的工艺设备进行改进和完善。 展开更多
关键词 锌浮渣 干法 湿法 球磨 分离 锌粉
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湿法热解法制备L-焦谷氨酸的工艺优化研究
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作者 王艳领 田春美 《化工管理》 2024年第14期150-152,共3页
采用湿法热解法,以L-谷氨酸为原料,探究L-焦谷氨酸的制备工艺条件。通过单因素和正交试验对反应的条件进行优化,确定了制备L-焦谷氨酸的最佳工艺条件是反应时间4 h、加水量15 g、反应温度150℃,此时所得L-谷氨酸的转化率为97.37%。这种... 采用湿法热解法,以L-谷氨酸为原料,探究L-焦谷氨酸的制备工艺条件。通过单因素和正交试验对反应的条件进行优化,确定了制备L-焦谷氨酸的最佳工艺条件是反应时间4 h、加水量15 g、反应温度150℃,此时所得L-谷氨酸的转化率为97.37%。这种方法是用水作为反应载体,无需催化剂与压力等条件,既节能减排,又产量高,为清洁高效生产L-焦谷氨酸提供了一定的理论指导和实验数据参考。 展开更多
关键词 L-焦谷氨酸 L-谷氨酸 湿法热解 工艺优化
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膨润土矿物选矿提纯方法研究
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作者 李彩霞 徐猛 +4 位作者 徐依 邢博文 李树蔚 周洪博 寇吉良 《贵州大学学报(自然科学版)》 2024年第1期20-26,共7页
膨润土是我国的一种优势资源,其主要矿物成分为层状结构的蒙脱石,但天然膨润土中蒙脱石的含量不高,一些低质的膨润土蒙脱石含量仅在50%左右,杂质含量较高,必须经过提纯才能用于开发高端产品。膨润土提纯方法及效果一直是行业急需的技术... 膨润土是我国的一种优势资源,其主要矿物成分为层状结构的蒙脱石,但天然膨润土中蒙脱石的含量不高,一些低质的膨润土蒙脱石含量仅在50%左右,杂质含量较高,必须经过提纯才能用于开发高端产品。膨润土提纯方法及效果一直是行业急需的技术,但不同的膨润土性能及伴生的杂质不同,提纯方法不同,针对膨润土提纯方法的现状,通过综述回顾膨润土提纯的研究进展,为膨润土提纯在实际生产中应用提供指导。 展开更多
关键词 膨润土 提纯 干法 湿法
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国产官能化溶聚丁苯橡胶SSBRBF2055M配方与性能的关系研究
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作者 王妮妮 《广东化工》 CAS 2024年第9期21-24,共4页
本文以国产官能溶聚丁苯橡胶化SSBR BF2055M为基础胶开展了应用配方研究,并考察了配方与加工能耗、加工性能、力学性能、动态性能等的关联关系。分别引入20份BR、NR、SBR作为复配胶,选用白炭黑作为补强材料,获得FBR、FNR、FSBR三种复合... 本文以国产官能溶聚丁苯橡胶化SSBR BF2055M为基础胶开展了应用配方研究,并考察了配方与加工能耗、加工性能、力学性能、动态性能等的关联关系。分别引入20份BR、NR、SBR作为复配胶,选用白炭黑作为补强材料,获得FBR、FNR、FSBR三种复合材料,结果表明,FNR混炼能耗低、加工性能好,FBR耐磨性好、滚动损失小、燃油经济性优异,FSBR湿牵引与湿操纵性能突出;本文还研究了高、低填充体系两个配方,研究数据表明,高填充体系的能耗高、滚动阻力差、抗湿滑性和抓地性好,低填充体系的加工性能好、滚动损失小。综合来看,设计的五个配方各有优势,均可用于绿色轮胎胎面胶中,可根据应用需求灵活选择。 展开更多
关键词 SSBR 配方研究 加工能耗 滚动损失 牵引与湿操控性能
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