期刊文献+
共找到1,495篇文章
< 1 2 75 >
每页显示 20 50 100
Fundamental Study on Coke Degradation in BF with Oxygen Enriched Blast and High Hydrogen Atmosphere 被引量:1
1
作者 WANGPing LIJia-xin ZHOULi-ying 《Journal of Iron and Steel Research International》 SCIE CAS CSCD 2005年第3期1-4,10,共5页
The effects of gas composition, temperature, ore to coke ratio and prereduction rate of ore on coke degradation were studied. The results showed that 1% increment in solution loss of coke reduces coke strength by 0.6%... The effects of gas composition, temperature, ore to coke ratio and prereduction rate of ore on coke degradation were studied. The results showed that 1% increment in solution loss of coke reduces coke strength by 0.6%, and the coke degradation is accelerated with the temperature. The higher the temperature, the more coke surface is involved in reactions, and the less negative effect on coke strength is. Hydrogen exerts stronger effect on coke degradation than CO at high temperature. The coke degradation is decreased with the reduction of ore to coke ratio and increase of ore prereduction rate. 展开更多
关键词 blast furnace oxygen enrichment high hydrogen atmosphere ore prereduction ore to coke ratio coke degradation
下载PDF
Effects of oxygen enriched tent by a new oxygen concentration machine on blood oxygen saturation and heart rate in tibet 被引量:2
2
作者 Guang-Hao Shen Kun Wang +5 位作者 Li-Hua Lu Kang-Ning Xie Qiao-Ling Xu Xiao-Ming Wu Chi Tang Er-Ping Luo 《Journal of Biomedical Science and Engineering》 2011年第2期130-135,共6页
Many people who live in the low altitude areas are often suffered from hypoxia when they entered the high plateau. This problem may seriously influence the physical and mental state and work efficacy for the travelers... Many people who live in the low altitude areas are often suffered from hypoxia when they entered the high plateau. This problem may seriously influence the physical and mental state and work efficacy for the travelers and workers. Oxygen enrichment of a small space air at high altitude is considered as a simple way to provide lowlanders enriched oxygen for sleeping and resting, improving work efficiency, so we developed an oxygen concentration machine based on the technology of oxygen enrichment membrane. This paper tested 8 healthy male lowlanders (age 21.63±1.77 yr) who have never exposed to plateau performed an incremental exercise on cycle ergometer at sea-level in order to be used as sea-level controls. Two days later, the same subjects were taken to Lhasa (3700 m) by air and exposed to the plateau, performed the same exercise as they did at sea-level. The next day, all subjects were asked to enter the experimental tent which was enriched with oxygen (higher than 24%) by the oxygen concentration machine and sleep for 10 hours at night, then exposed to plateau and performed the same exercise twice at different time (2 hours and 10 hours after oxygen enrichment). During the tests, subjects must cycled continuously at 60 rpm beginning with a 3 min exercise intensity of 0 W followed by incremental increases of 25 W every 3 min until 150 W, pulse oxygen saturation (SpO2) and heart rate (HR) were recorded. After sleeping in an oxygen enrichment of tent air, 2 hours later, the subjects’ load capacity had no difference compared with control group, but significant difference than before (higher SpO2 and lower HR), which indicated that oxygen concentration machine is effective in increasing the oxygen concentration of the air for the tent and sleeping in the oxygen enrichment tent for l0 h might be effective in improving exercise performance during high-altitude hypoxia. At the same time, 10 hours later, when work-load exceeded 125 W, the same effects were also found. The results indicated the effects of oxygen enrichment of tent air could last a certain period of time. 展开更多
关键词 HYPOXIA oxygen Concentration MACHINE oxygen enrichMENT Membrane High PLATEAU oxygen enrichMENT
下载PDF
Simulation Studies of Diesel Engine Combustion Characteristics with Oxygen Enriched Air
3
作者 Heng Wang Weijun Liu 《Journal of Power and Energy Engineering》 2015年第8期15-23,共9页
Based on a six-cylinder direct injection diesel engine, the engine operating condition was simulated by application AVL-FIRE software coupling the n-heptane reduced mechanism containing polycyclic aromatic hydrocarbon... Based on a six-cylinder direct injection diesel engine, the engine operating condition was simulated by application AVL-FIRE software coupling the n-heptane reduced mechanism containing polycyclic aromatic hydrocarbon (PAH) formation. The simulation and its verification test were both carried out under the maximum torque point. Then, the oxygen enriched combustion was simulated on the model, and the simulated condition was oxygen volume fraction from 21% to 30%. The simulation results show that, the oxygen enrichment (from 21% to 30%) increases the peak cylinder pressure of 3.32%, advances the start of combustion of 1.6 deg and rises the peak of average temperature in cylinder and wall heat flux. Among them, at the condition of 24% O2, the change of the results is the most significant. Benzene (A1) is one of the precursors of soot generated, the analysis of its impress-cuts of the mass distribution field in cylinder shows that, the increase of oxygen concentration can significantly inhibit the formation of benzene. But the oxygen enrichment makes the combustion more sufficient, cased a rise in the cylinder temperature, an extension in high temperature area, and an increment in the NOx emission. 展开更多
关键词 DIESEL Engine Numerical SIMULATION oxygen enriched COMBUSTION COMBUSTION CHARACTERISTIC
下载PDF
The treatment of black-odorous water using tower bipolar electro-flocculation including the removal of phosphorus,turbidity,sulfion,and oxygen enrichment 被引量:8
4
作者 Huan He Qinjin Yu +5 位作者 Chaochao Lai Chen Zhang Muhan Liu Bin Huang Hongping Pu Xuejun Pan 《Frontiers of Environmental Science & Engineering》 SCIE EI CAS CSCD 2021年第2期19-31,共13页
The large amount of municipal wastewater discharged into urban rivers sometimes exceeds the rivers’self-purification capacity leading to black-odorous polluted water.Electro-flocculation has emerged as a powerful rem... The large amount of municipal wastewater discharged into urban rivers sometimes exceeds the rivers’self-purification capacity leading to black-odorous polluted water.Electro-flocculation has emerged as a powerful remediation technology.Electro-flocculation in a bubble column tower with a bipolar electrode(BPE)was tested in an attempt to overcome the high resistance and weak gas-floatation observed with a monopolar electrode(MPE)in treating such water.The BPE reactor tested had a Ti/Ta2O_(5)-IrO_(2)anode and a graphite cathode with an iron or aluminum bipolar electrode suspended between them.It was tested for its ability to reduce turbidity,phosphate and sulphion and to increase the concentration of dissolved oxygen.The inclusion of the bipolar electrode was found to distinctly improved the system’s conductivity.The system’s electro-flocculation and electrical floatation removed turbidity,phosphate and sulphion completely,and the dissolved oxygen level improved from 0.29 to 6.28 mg/L.An aluminum bipolar electrode performed better than an iron one.Changes in the structure of the microbial community confirmed a significant improvement in water quality. 展开更多
关键词 Black-odorous water Bipolar electrodes FLOCCULATION Floatation oxygen enrichment TURBIDITY
原文传递
Experimental investigation on possibility of oxygen enrichment by using gradient magnetic fields
5
作者 CAI Jun WANG Li +2 位作者 WU Ping TONG Lige SUN Shufeng 《Frontiers of Chemical Science and Engineering》 SCIE EI CSCD 2007年第3期271-276,共6页
This paper presents a novel method that uses the interception effect of gradient magnetic field on oxygen molecules to realize enrichment.The use of two opposite magnetic poles of two magnets at a certain distance for... This paper presents a novel method that uses the interception effect of gradient magnetic field on oxygen molecules to realize enrichment.The use of two opposite magnetic poles of two magnets at a certain distance forms a magnetic space having a field intensity gradient near its borders.When air injected into the magnetic space outflows from the magnetic space via its borders,oxygen molecules in the air will experience the interception effect of the gradient magnetic field,but nitrogen molecules will outflow from the magnetic space without hindrance.Thus,continuous oxygen enrichment is realized.The enrichment degree of oxygen reaches 0.65%when the inlet and outlet air flows are 40 mL/min and 20 mL/min,respectively,and the gas temperature is 298 K and the maximal product of magnetic flux density and its gradient is 563 T2/m(the distance between two magnetic poles is 1 mm).When the gas temperature rises to 343 K,the enrichment degree drops to 0.32%;and when the maximal product of magnetic flux density and field intensity gradient drops to 101 T2/m(the distance between two magnetic poles is 4 mm),the enrichment degree drops to 0.23%.The experimental results show that there is an optimal ratio between the inlet air flow and the outlet air flow.Under the experimental conditions in this paper,the value is about 2.0.It is demonstrated that the method presented in this paper can continuously enrich oxygen and has a higher enrich-ment degree than other oxygen-enrichment methods using magnetic separation. 展开更多
关键词 magnetic separation oxygen enrichment gradient magnetic field separation of oxygen and nitrogen magnetizing force
原文传递
Effect of oxygen enrichment on sintering behavior of high proportion vanadium-titanium magnesite concentrates
6
作者 Shi-hong Peng Hao Liu +4 位作者 Ze-zheng Sun Chang-wei Li Yue-lin Qin Wei-qiang Liu Guang Wang 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2023年第11期2122-2132,共11页
To achieve high-efficiency utilization of complex and unmanageable iron-containing minerals,the effects of oxygen enrichment on productivity,yield,flame front speed,exhaust gas peak temperature,and desulphurization re... To achieve high-efficiency utilization of complex and unmanageable iron-containing minerals,the effects of oxygen enrichment on productivity,yield,flame front speed,exhaust gas peak temperature,and desulphurization reaction of the vanadium-titanium magnetite sintering process as well as sinter tumble index and mineralogy were clarified,with oxygen enrichment concentrations ranging from 21 to 29 vol.%.Results indicated that with increasing the oxygen enrichment concentration from 21 to 27 vol.%,the flame front speed increased from 30.3 to 40.0 mm min^(-1),the yield enhanced from 72%to 77%,and the productivity augmented from 1.83 to 2.67t m^(-2)h^(-1);in the meantime,the tumble index was improved from 73.7%to 77.9%,and the exhaust gas peak temperature rose from 376.4 to 484.8℃.The main reason for the improvement in sintering properties was the increased combustibility of fuels and the generation of proper liquid phase that improved the permeability of the packed bed.The improved sinter strength is mainly due to the increase in the phase fraction of silico-ferrites of calcium and aluminium.In addition,oxygen enrichment sintering could significantly increase the desulphurization level of vanadium-titanium magnetite sinter and the rate of desulphurization reaction during sintering process. 展开更多
关键词 SINTER oxygen enrichment Vanadium-titanium magnetite Sintering behavior
原文传递
Method of oxygen-enriched two-stage underground coal gasification 被引量:11
7
作者 Liu Hongtao Chen Feng +2 位作者 Pan Xia Yao Kai Liu Shuqin 《Mining Science and Technology》 EI CAS 2011年第2期191-196,共6页
Two-stage underground coal gasification was studied to improve the caloric value of the syngas and to extend gas production times.A model test using the oxygen-enriched two-stage coal gasification method was carried o... Two-stage underground coal gasification was studied to improve the caloric value of the syngas and to extend gas production times.A model test using the oxygen-enriched two-stage coal gasification method was carried out.The composition of the gas produced,the time ratio of the two stages,and the role of the temperature field were analysed.The results show that oxygen-enriched two-stage gasification shortens the time of the first stage and prolongs the time of the second stage.Feed oxygen concentrations of 30%, 35%,40%,45%.60%,or 80%gave time ratios(first stage to second stage) of 1:0.12,1:0.21.1:0.51,1:0.64, 1:0.90.and 1:4.0 respectively.Cooling rates of the temperature field after steam injection decreased with time from about 19.1-27.4℃/min to 2.3-6.8℃/min.But this rate increased with increasing oxygen concentrations in the first stage.The caloric value of the syngas improves with increased oxygen concentration in the first stage.Injection of 80%oxygen-enriched air gave gas with the highest caloric value and also gave the longest production time.The caloric value of the gas obtained from the oxygenenriched two-stage gasification method lies in the range from 5.31 MJ/Nm^3 to 10.54 MJ/Nm^3. 展开更多
关键词 Underground coal gasification enriched oxygen Two-stage gasification Temperature field
下载PDF
Simulation and Experiment for Oxygen-enriched Combustion Engine Using Liquid Oxygen to Solidify CO2 被引量:5
8
作者 LIU Yongfeng JIA Xiaoshe +3 位作者 PEI Pucheng LU Yong YI Li SHI Yan 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2016年第1期188-194,共7页
For capturing and recycling of CO2 in the internal combustion engine, Rankle cycle engine can reduce the exhaust pollutants effectively under the condition of ensuring the engine thermal efficiency by using the techni... For capturing and recycling of CO2 in the internal combustion engine, Rankle cycle engine can reduce the exhaust pollutants effectively under the condition of ensuring the engine thermal efficiency by using the techniques of spraying water in the cylinder and optimizing the ignition advance angle. However, due to the water spray nozzle need to be installed on the cylinder, which increases the cylinder head design difficulty and makes the combustion conditions become more complicated. In this paper, a new method is presented to carry out the closing inlet and exhaust system for internal combustion engines. The proposed new method uses liquid oxygen to solidify part of cooled CO2 from exhaust system into dry ice and the liquid oxygen turns into gas oxygen which is sent to inlet system. The other part of CO2 is sent to inlet system and mixed with oxygen, which can reduce the oxygen-enriched combustion detonation tendency and make combustion stable. Computing grid of the IP52FMI single-cylinder four-stroke gasoline-engine is established according to the actual shape of the combustion chamber using KIVA-3V program. The effects of exhaust gas recirculation (EGR) rate are analyzed on the temperatures, the pressures and the instantaneous heat release rates when the EGR rate is more than 8%. The possibility of enclosing intake and exhaust system for engine is verified. The carbon dioxide trapping device is designed and the IP52FMI engine is transformed and the CO2 capture experiment is carried out. The experimental results show that when the EGR rate is 36% for the optimum EGR rate. When the liquid oxygen of 35.80-437.40 g is imported into the device and last 1-20 min, respectively, 21.50-701.30 g dry ice is obtained. This research proposes a new design method which can capture CO2 for vehicular internal combustion engine. 展开更多
关键词 internal combustion Rankle cycle engine CO2 emission reduction carbon-sequestration with liquid oxygen KIVA-3V program oxygen-enriched combustion numerical simulation experiments
下载PDF
Enriched Oxygen BAC Method in Advanced Treatment of Textile Dyeing-printing & Alkali-peeling Wastewater 被引量:1
9
作者 田晴 陈季华 张华 《Journal of Donghua University(English Edition)》 EI CAS 2006年第1期84-88,共5页
A novel Pressurized Enriched Oxygen Biological Activated Carbon (PRBAC) method in treating secondary effluent of textile dying-printing & alkali peeling wastewater was configured. The PRBAC reactor simply increased... A novel Pressurized Enriched Oxygen Biological Activated Carbon (PRBAC) method in treating secondary effluent of textile dying-printing & alkali peeling wastewater was configured. The PRBAC reactor simply increased reactor pressure to create an eurtched dissolved oxygen (DO) environment to stimulate the bioactivities of microbes on GAC surface for removing refractory organic matter. Rapid Small- Scaled Colunm Test (RSSCT) was carried out to evaluate the adsorption characteristics of target stream constituents, and over 80% COD components were poorly adsorbable while about 82.5% color inducing matter and 85% UV254 surrogated matter were readily adsorbable. Compared with performances of normal BAC reactor under conventional DO condition, PRBAC achieved 20%, 10% and 50% more removal in COD, color and NH3-N abatement. 展开更多
关键词 PRBAC method textile dying-printing alkali-peeling wastewter enriched oxygen condition advanced treatment RSSCT
下载PDF
Experimental Study on Combustion Characteristics of Pulverized Coal under Enriched-oxygen Condition by Entrained Flow Reactor 被引量:1
10
作者 Guo-Wei Liu Dao-Zhi Qu +1 位作者 Peng Dong Ru-Shan Bie 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2013年第1期46-51,共6页
Four different pulverized coals have been used to study the effects of oxygen concentration on combustion characteristics under different enriched-oxygen conditions by entrained flow reactor experiments. The results s... Four different pulverized coals have been used to study the effects of oxygen concentration on combustion characteristics under different enriched-oxygen conditions by entrained flow reactor experiments. The results show that: with the increase of oxygen concentration, the ignition temperature of four coals greatly decreases and the low volatile coals decrease faster; with the increase of oxygen concentration, the ignition mode of pulverized coal has an obviously transformation from homogeneous ignition to heterogeneous ignition, and the corresponding oxygen concentrations are about 40% and 50%-60% respectively for bituminous coal and lignite, and both about 30% for lean coal and anthracite; with the increase of oxygen concentration, the optimal pulverized coal concentrations of bituminous coal and lignite increase firstly and then decrease, but for lean coal and anthracite, the optimal pulverized coal concentrations decrease slowly with the increase of oxygen concentration. 展开更多
关键词 enriched-oxygen condition combustion characteristics entrained flow reactor ignition mode
下载PDF
The denitrogenation by breathing oxygen-rich gas to prevent altitude decompression sickness 被引量:3
11
作者 Hua-jun XIAO Xiao-peng LIU +2 位作者 Bin ZANG Gui-you WANG Zhao GU 《中国应用生理学杂志》 CAS CSCD 2012年第6期568-571,共4页
Objective While the technology of the molecular sieve oxygen generation system(MSOGS) onboard was used,pilots could not breathe pure oxygen to eliminate nitrogen during a high altitude flight.There is no report whethe... Objective While the technology of the molecular sieve oxygen generation system(MSOGS) onboard was used,pilots could not breathe pure oxygen to eliminate nitrogen during a high altitude flight.There is no report whether it is a threat to altitude decompression sickness(ADS) or not in that condition.This experiment was intended to observe the effects of breathing different oxygen-rich gases of MSOGS on denitrogenation,so that we could make the medical physiological requirements for MSOGS on-board and provide experimental basis for aeromedical supply.Method Eight healthy males were breathed oxygenrich gases(60%,70%,80%,90%and 99.6%) in turn for 60 min,and the concentration of nitrogen,oxygen,carbon dioxide and argon at the end of expiration interval in the oxygen mask were continuously measured by a flight mass spectrometer through the oxygen mask.According to the variety of the denitrogenation rate by breathing different oxygen-rich gases,its change law was analyzed.Results There were significant differences(P<0.05) about denitrogenation rate in different oxygen-rich gases due to different oxygen concentration and breathing time.The denitrogenation rate of pure oxygen was higher than that of the others.It was indicated that the concentration of nitrogen in lung would decrease along with the increase in oxygen concentration of oxygen-rich gases,and the nitrogen concentration in the lung almost decreased by 50% or even more if people were breathed 60%~90% oxygen-rich gas longer than 60 s.Conclusion The man-made respiration environment of low nitrogen can be provided by breathing oxygen-rich gases,although the denitrogenation velocity of breathing oxygen-rich gases is lower than that of breathing pure oxygen.So it can be used as a measure to eliminate and lower the nitrogen in the body to prevent from ADS. 展开更多
关键词 脱氮率 呼吸 气体 富氧 减压 高空 氧气面罩 时间间隔
下载PDF
水产养殖中传统增氧设备增氧能力差异分析 被引量:3
12
作者 钟伟 吴姗姗 +2 位作者 韩梦遐 倪琦 顾海涛 《渔业现代化》 CSCD 北大核心 2024年第1期39-47,共9页
为了解水产养殖中应用广泛的叶轮式增氧机、水车式增氧机、涌浪式增氧机和曝气式增氧机4种型式的增氧机的增氧性能水平,统计和分析了国内主要增氧设备生产企业2020年以来生产的145台不同型式增氧机的增氧能力试验数据。结果显示:1)部分... 为了解水产养殖中应用广泛的叶轮式增氧机、水车式增氧机、涌浪式增氧机和曝气式增氧机4种型式的增氧机的增氧性能水平,统计和分析了国内主要增氧设备生产企业2020年以来生产的145台不同型式增氧机的增氧能力试验数据。结果显示:1)部分企业生产的叶轮增氧机的增氧性能有所下降;2)水车式增氧机增氧性能有大幅提高,部分产品超过了SC/T 6010—2018《叶轮式增氧机通用技术条件》中规定同规格叶轮式增氧机的要求;3)涌浪式增氧机增氧性能总体呈上升趋势;4)曝气式增氧机具有较强的增氧性能,但配套风机形式不同、相同配套功率但曝气管不同的配置,其增氧性能存在较大差异。本研究为养殖用户在水产养殖系统增氧设备的配置时提供技术参考。 展开更多
关键词 水产养殖 增氧设备 增氧能力 差异分析
下载PDF
超高料层双层烧结富氧强化及烟气排放行为研究 被引量:1
13
作者 刘杰 周明顺 +4 位作者 刘会波 徐良平 钟强 李光辉 姜涛 《中南大学学报(自然科学版)》 EI CAS CSCD 北大核心 2024年第3期851-859,共9页
针对超高料层双层烧结矿强度低的问题,采用富氧方法强化双层烧结。研究富氧浓度和燃料用量对烧结矿产质量的影响,分析普通双层烧结和富氧强化双层烧结的烧结矿主要矿物组成和微观结构,研究两者烧结烟气中O_(2)、CO_(2)和CO的排放行为。... 针对超高料层双层烧结矿强度低的问题,采用富氧方法强化双层烧结。研究富氧浓度和燃料用量对烧结矿产质量的影响,分析普通双层烧结和富氧强化双层烧结的烧结矿主要矿物组成和微观结构,研究两者烧结烟气中O_(2)、CO_(2)和CO的排放行为。研究结果表明:富氧方法能明显强化超高料层双层烧结,大幅度提高烧结矿成品率和转鼓强度;二次点火后对料层进行富氧,氧气体积分数为25%,烧结矿成品率、转鼓强度、利用系数和固体燃耗分别为69.06%、66.40%、2.09t/(m^(2)∙h)和53.79kg/t,与普通双层烧结指标相比,成品率、转鼓强度和利用系数分别提高4.11%、7.73%、0.18t/(m^(2)∙h),固体燃耗降低3.23kg/t;富氧使烧结矿中磁铁矿氧化充分,铁酸钙大量生成,烧结矿结构均质、紧密;富氧增大烧结烟气O_(2)质量分数,可有效解决下部料层缺氧问题,提高燃料燃烧效率,减少CO排放量。 展开更多
关键词 铁矿烧结 超高料层 双层烧结 富氧 烧结烟气 矿物结构
下载PDF
基于人工神经网络的甲烷富氧燃烧机理优化 被引量:1
14
作者 黄章俊 徐通 +3 位作者 何洪浩 孙刘涛 田红 李新卓 《动力工程学报》 CAS CSCD 北大核心 2024年第4期520-527,共8页
采用带误差传播的直接关系图法、全物种敏感性分析和人工神经网络(ANN)联合方法,以点火延迟时间和CO摩尔分数为优化目标,通过对甲烷富氧燃烧详细机理USC mech2.0的简化和优化,提出了基于人工神经网络的甲烷富氧燃烧优化机理(ANN-OMOC)... 采用带误差传播的直接关系图法、全物种敏感性分析和人工神经网络(ANN)联合方法,以点火延迟时间和CO摩尔分数为优化目标,通过对甲烷富氧燃烧详细机理USC mech2.0的简化和优化,提出了基于人工神经网络的甲烷富氧燃烧优化机理(ANN-OMOC)。甲烷富氧燃烧模拟计算和对比分析的结果表明:相比于甲烷富氧燃烧简化机理FSSA的预测误差,优化机理ANN-OMOC对点火延迟时间、层流火焰速度的预测误差分别从2.53%、24.38%降到0.50%、14.41%;与甲烷富氧燃烧的简化机理DRGEP和FSSA相比,优化机理ANN-OMOC对点火延迟时间、OH摩尔分数峰值和CO摩尔分数峰值的预测结果最佳,其相对误差均在10%以下。 展开更多
关键词 甲烷 富氧燃烧 机理优化 人工神经网络 点火延迟时间 CO摩尔分数
下载PDF
制硫炉内酸性气燃烧过程的数值模拟
15
作者 王娟 刘翊辉 +2 位作者 伊志奇 李迪 李秀明 《石油学报(石油加工)》 EI CAS CSCD 北大核心 2024年第6期1604-1613,共10页
在酸性气燃烧制硫工艺中,酸性气的安全、稳定燃烧对制硫炉的平稳运行具有重要的影响。对制硫炉在3种负荷(30%为低负荷、100%为满负荷、120%为超负荷)条件下的燃烧状况进行数值模拟,采用RNG k-ε模型模拟制硫炉炉膛内的湍流过程,采用涡... 在酸性气燃烧制硫工艺中,酸性气的安全、稳定燃烧对制硫炉的平稳运行具有重要的影响。对制硫炉在3种负荷(30%为低负荷、100%为满负荷、120%为超负荷)条件下的燃烧状况进行数值模拟,采用RNG k-ε模型模拟制硫炉炉膛内的湍流过程,采用涡耗散模型模拟制硫反应过程中的组分运输和化学反应过程,考察制硫炉炉膛内混合气体速度、温度、反应物和生成物浓度的变化情况。结果表明:低负荷条件下,单位时间内硫产量较少,工业应用的性价比较低;超负荷条件下的湍流强度较高,对燃烧室、炉膛,尤其对第一道导流板造成的损耗巨大;因此满负荷最适用于制硫炉。制硫炉炉膛中混合气体的速度、温度分布都比较均匀,主要生成产物S_(2)在炉膛出口的质量分数分别为12.30%、12.38%和12.35%,主要生成物SO_(2)的质量分数为1.59%、1.41%和1.49%,3种负荷条件下燃烧产生的2种主要生成物S_(2)和SO_(2)在炉膛出口处含量占比十分接近,证明制硫炉在设计弹性负荷30%~120%范围内均可以保证稳定燃烧。 展开更多
关键词 克劳斯反应 酸性气 富氧燃烧 数值模拟 H_(2)S燃烧炉 燃烧特性 硫回收
下载PDF
顶侧复合连续炼铜系统开发之工艺流程再造
16
作者 陆金忠 孙晓峰 李海春 《绿色矿冶》 2024年第2期1-5,共5页
富氧顶吹浸没熔炼工艺是在特定时期引进并在国内实现消化创新和广泛应用的铜冶炼技术,为我国铜冶炼行业从传统熔炼工艺向现代强化熔炼工艺的跨越作出重要贡献。近年来,连续炼铜技术和短流程技术快速发展,造锍熔炼在高富氧浓度、高铜锍... 富氧顶吹浸没熔炼工艺是在特定时期引进并在国内实现消化创新和广泛应用的铜冶炼技术,为我国铜冶炼行业从传统熔炼工艺向现代强化熔炼工艺的跨越作出重要贡献。近年来,连续炼铜技术和短流程技术快速发展,造锍熔炼在高富氧浓度、高铜锍品位、高温和高处理能力方向上不断突破。在高质量发展要求和技术快速进步的背景下,国内各生产企业结合自身实际围绕铜冶炼系统的绿色节能降耗开展了系列探索和研究,取得了一系列成果。本文围绕新时期铜精矿富氧顶吹浸没熔炼工厂技术升级改造的工艺创新与流程再造进行探索,提出总体思路和开发方向,包括主体设备供风装置增加侧吹喷枪,并对冶金炉炉体结构及其他配套设施进行相应的改造,取消原料制粒系统和沉降电炉,实现高品位铜锍冶炼和连续炼铜,以期为顶吹熔池熔炼工厂技术和装置的升级改造提供技术储备、指导及参考,推动行业向低碳、绿色、环保方向迈进。 展开更多
关键词 铜冶炼 富氧顶吹浸没熔炼 连续炼铜 控制优化 工艺升级
下载PDF
含铜污泥搭配发热危废协同处理及综合利用技术
17
作者 王兴 《世界有色金属》 2024年第8期14-16,共3页
本文介绍了富氧侧吹熔池熔炼炉协同处理含铜污泥和发热危废的技术,该工艺具有金属回收率高、熔炼强度大、一次能源消耗低,实现了含铜污泥的有价金属的综合回收和发热危废的无害化处理。生产实践表明:处理量10万吨/a含铜污泥和发热危废,... 本文介绍了富氧侧吹熔池熔炼炉协同处理含铜污泥和发热危废的技术,该工艺具有金属回收率高、熔炼强度大、一次能源消耗低,实现了含铜污泥的有价金属的综合回收和发热危废的无害化处理。生产实践表明:处理量10万吨/a含铜污泥和发热危废,可降低煤率约10%,节约成本770万/a,产出约4000t/a的多金属合金(其中含铜55%、含镍11.9%),为企业提质增效打开了的突破口。 展开更多
关键词 含铜污泥 富氧侧吹熔池熔炼 黑铜 水淬渣
下载PDF
富氧助燃技术在陶瓷企业中的应用
18
作者 吴杰 姜倩洁 娄依崇 《节能》 2024年第8期67-69,共3页
结合富氧助燃技术在浙江绍兴陶瓷企业中应用的实际案例,对案例进行经济性分析。结果显示:案例应用富氧助燃技术后,用电量增加了1%,企业天然气消耗降低了16.5%,辊道窑的净节能率达到了15.5%。研究为富氧助燃技术在小型陶瓷轻工业中的应... 结合富氧助燃技术在浙江绍兴陶瓷企业中应用的实际案例,对案例进行经济性分析。结果显示:案例应用富氧助燃技术后,用电量增加了1%,企业天然气消耗降低了16.5%,辊道窑的净节能率达到了15.5%。研究为富氧助燃技术在小型陶瓷轻工业中的应用起到示范作用,进一步验证了富氧助燃技术的巨大潜力和应用前景。 展开更多
关键词 富氧 辊道窑 节能
下载PDF
酒钢7#高炉96h休风炉况快速恢复实践
19
作者 杨斌 薛明 王鹤欣 《甘肃冶金》 2024年第2期61-63,共3页
阐述了酒钢本部7#高炉96h休风前炉况、检修准备、检修过程控制和高炉送风后炉况恢复,归纳检修过程及炉况恢复过程中存在的问题,为后续高炉长期检修炉况顺利恢复提出指导意见.
关键词 高炉 休风 焦炭负荷 风温 富氧
下载PDF
砷在富氧底吹炼铜过程中的走向及物相结构
20
作者 王保仁 杨洪英 +2 位作者 金哲男 佟琳琳 马志远 《中国有色金属学报》 EI CAS CSCD 北大核心 2024年第3期908-922,共15页
采用Factsage热力学分析、元素分析、XRD、SEM−EDS及金相显微镜等手段研究了富氧底吹炼铜工艺中砷的走向和物相结构。结果表明:通过适当降低富氧浓度,可以提高熔炼温度增加烟气和烟尘中砷的分配。混合炉料中砷主要存在于毒砂和砷黝铜矿... 采用Factsage热力学分析、元素分析、XRD、SEM−EDS及金相显微镜等手段研究了富氧底吹炼铜工艺中砷的走向和物相结构。结果表明:通过适当降低富氧浓度,可以提高熔炼温度增加烟气和烟尘中砷的分配。混合炉料中砷主要存在于毒砂和砷黝铜矿中,少部分存在于返渣的冰铜相和细烟尘中;冰铜中砷主要以含砷锑冰铜形式存在,平均砷含量为4.75%(质量分数);粗铜中砷主要与铜、锑、铅等形成固溶体,平均砷含量为7.78%;底吹炉渣中砷主要分布于渣相所含的含砷锑冰铜(26.38%)中,少部分存在于玻璃相基底(1.73%)和铁橄榄石相(2.08%)中;磁选前渣中砷主要存在于渣中的复杂含砷冰铜相中,大部分被渣包裹,平均砷含量为37.26%。 展开更多
关键词 富氧底吹炼铜 工艺矿物学 赋存状态
下载PDF
上一页 1 2 75 下一页 到第
使用帮助 返回顶部