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High-chromium vanadium-titanium magnetite all-pellet integrated burden optimization and softening-melting behavior based on flux pellets 被引量:1
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作者 Bojian Chen Tao Jiang +4 位作者 Jing Wen Guangdong Yang Tangxia Yu Fengxiang Zhu Peng Hu 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2024年第3期498-507,共10页
High-chromium vanadium-titanium magnetite(HVTM)is a crucial polymetallic-associated resource to be developed.The allpellet operation is a blast furnace trend that aims to reduce carbon dioxide emissions in the future.... High-chromium vanadium-titanium magnetite(HVTM)is a crucial polymetallic-associated resource to be developed.The allpellet operation is a blast furnace trend that aims to reduce carbon dioxide emissions in the future.By referencing the production data of vanadium-titanium magnetite blast furnaces,this study explored the softening-melting behavior of high-chromium vanadium-titanium magnetite and obtained the optimal integrated burden based on flux pellets.The results show that the burden with a composition of 70wt%flux pellets and 30wt%acid pellets exhibits the best softening-melting properties.In comparison to that of the single burden,the softening-melting characteristic temperature of this burden composition was higher.The melting interval first increased from 307 to 362℃and then decreased to 282℃.The maximum pressure drop(ΔPmax)decreased from 26.76 to 19.01 kPa.The permeability index(S)dropped from 4643.5 to 2446.8 kPa·℃.The softening-melting properties of the integrated burden were apparently improved.The acid pellets played a role in withstanding load during the softening process.The flux pellets in the integrated burden exhibited a higher slag melting point,which increased the melting temperature during the melting process.The slag homogeneity and the TiC produced by over-reduction led to the gas permeability deterioration of the single burden.The segregation of the flux and acid pellets in the HVTM proportion and basicity mainly led to the better softening-melting properties of the integrated burden. 展开更多
关键词 high-chromium vanadium-titanium magnetite softening-melting properties all pellets integrated burden flux pellets
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The research on the decomposition and softening-meltingproperties of iron ore by TG-DSC
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作者 QI Wei LI Xianwei SHEN Hongbiao ZHU Yaping 《Baosteel Technical Research》 CAS 2012年第2期8-12,共5页
13 kinds of iron ores (6 from Australia and 7 from Brazil) were studied on their properties concerning CW (Combined Water) decomposition, FezO3 decomposition and softening-melting in air atmosphere through the cha... 13 kinds of iron ores (6 from Australia and 7 from Brazil) were studied on their properties concerning CW (Combined Water) decomposition, FezO3 decomposition and softening-melting in air atmosphere through the characterization method of TG-DSC (Thermogravimetry-Differential Scanning Caloremetry ). The experimental results of the Australian ores and Brazilian ores differ in terms of the initial temperature, temperature range and endothermic amount of CW decomposition,and besides, the content of CW. It is estimated that for every percent increase of CW content in sintering raw material, the extra thermal amount absorbed in the process is about 1.83 x 104 kJ, which equals to the thermal capacity of 0.625 kg of standard coal burning up completely. As to the decomposition of Fe203 ,the initial temperatures, terminal temperatures and temperature ranges of the Australian and Brazilian ores are quite close. However, the endothermic amount of Fe2O3 decomposition of the two turns out rather different: the endothermic capacity of Fe2O3 decomposition of the Australian ores is greater than that of the Brazilian ores. Furthermore, the liquid amount generated in the softening-melting process is closely related to the SiO2 content in iron ore. The higher SiO2 content the ore contains, the more liquid volume it will generate in the softening-melting process of iron ore. 展开更多
关键词 iron ore TG-DSC CW decomposition Fe2O3 decomposition softening-melting properties
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Changes in Soil Properties Under the Influences of Cropping and Drip Irrigation During the Reclamation of Severe Salt-Affected Soils 被引量:16
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作者 TAN Jun-li KANG Yue-hu 《Agricultural Sciences in China》 CAS CSCD 2009年第10期1228-1237,共10页
Reclamation of salt-affected land plays an important role in mitigating the pressure of agricultural land due to competition with industry and construction in China. Drip irrigation was found to be an effective method... Reclamation of salt-affected land plays an important role in mitigating the pressure of agricultural land due to competition with industry and construction in China. Drip irrigation was found to be an effective method to reclaim salt-affected land. In order to improve the effect of reclamation and sustainability of salt-affected land production, a field experiment (with reclaimed 1-3 yr fields) was carried out to investigate changes in soil physical, chemical, and biological properties during the process of reclamation with cropping maize and drip irrigation. Results showed that soil bulk density in 0-20 cm soil layer decreased from 1.71 g·cm-3 in unreclaimed land to 1.44 g ·cm^-3 in reclaimed 3 yr fields, and saturated soil water content of 0-10 cm layer increased correspondingly from 20.3 to 30.2%. Both soil salinity and pH value in 0-40 cm soil layer dropped markedly after reclaiming 3 yr. Soil organic matter content reduced, while total nitrogen, total phosphorus, and total potassium all tended to increase after cropping and drip irrigation. The quantities of bacteria, actinomycete, and fungi in 0-40 cm soil layer all greatly increased with increase of reclaimed years, and they tended to distribute homogeneously in 0-40 cm soil profile. The urease activity and alkaline phosphatase activity in 0-40 cm soil layers were also enhanced, but the sucrase activity was not greatly changed. These results indicated that after crop cultivation and drip irrigation, soil physical environment and nutrients status were both improved. This was benefit for microorganism's activity and plant's growth. 展开更多
关键词 RECLAMATION drip irrigation changes of soil properties salt-affected soil
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Effects of Chlorination on Soil Chemical Properties and Nitrogen Uptake for Tomato Drip Irrigated with Secondary Sewage Effluent 被引量:2
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作者 LI Yan-feng LI Jiu-sheng ZHANG Hang 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2014年第9期2049-2060,共12页
Chlorination is usually an economical method for treating clogging in drip emitters during sewage application. Appropriate assessment of the responses of soil and crop is essential for determining an optimal chlorinat... Chlorination is usually an economical method for treating clogging in drip emitters during sewage application. Appropriate assessment of the responses of soil and crop is essential for determining an optimal chlorination scheme. During 2008 to 2009, field experiments were conducted in a solar-heated greenhouse for tomato drip irrigated with secondary sewage effluent, to investigate the influences of chlorine injection intervals and levels on soil chemical properties and nitrogen uptake. Injection intervals ranging from two to eight weeks and injection concentrations ranging from 2 to 50 mg L-1 were used. A salinity factor and a nutrient factor were extracted from the pool of the nine soil chemical constituents using factor analysis method. The results demonstrated that chlorination practices increased the residual Cl in the soil, resulting in an increased salinity factor, especially for the frequent chlorination at a high injection concentration. Chlorination weakened the accumulation of nutrients factor in the upper soil layer. Nitrogen uptake of the tomato plants also was inhibited by the increased salinity in the upper soil layer caused by high chlorination levels. In order to reduce the unfavorable effect on soil chemical properties and nitrogen uptake, chlorination scheme with concentrations of lower than 20 mg L-1 was recommended. 展开更多
关键词 CHLORINATION drip irrigation soil chemical properties nitrogen uptake sewage effluent
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Effect of lump ore ratio on the metallurgical properties of blast furnace charge
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作者 TAN Chenglin MAO Xiaoming XU Wanren 《Baosteel Technical Research》 CAS 2023年第4期28-34,共7页
We conducted a series of experimental studies on the metallurgical properties of N-lump and F-lump ores used in Baosteel’s blast furnace, including thermal cracking, low-temperature reduction pulverization, reducibil... We conducted a series of experimental studies on the metallurgical properties of N-lump and F-lump ores used in Baosteel’s blast furnace, including thermal cracking, low-temperature reduction pulverization, reducibility, and droplet properties.The results show that the thermal burst properties of N-lump ore are better than those of F-lump ore.The low-temperature reduction degradation index(RDI) pulverization of the charge is the best when the ratios of N-lump ore and F-lump ore account for 35% each.The reduction performance of the charge is improved when F-lump and N-lump ores are mixed with sinter.In the softening-melting performance experiment, when the proportion of N-lump ore is 40%,the characteristic area value(S) as the charge permeability index is the smallest.When F-lump ore is mixed with sinter, its droplet performance improves compared with that of single F-lump ore.The proportion of F-lump ore should not exceed 15%. 展开更多
关键词 lump ore ratio metallurgical property experiment softening-melting property the RDI pulverization reduction property
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不同富氧阶段下烧结矿的矿相结构及软熔滴落性能
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作者 刘磊 朱旺 +5 位作者 赵俊花 张志东 单长冬 刘征建 王耀祖 李思达 《烧结球团》 北大核心 2024年第1期65-71,79,共8页
为了深入探究不同富氧阶段下烧结矿的矿物组成及冶金性能,本文采用SEM-EDS和荷重软化熔滴设备研究在烧结前、中、后期采用富氧喷吹时烧结矿的矿相结构和软熔性能的变化规律和影响机理。试验结果表明:烧结矿的矿物组成主要包括赤铁矿、... 为了深入探究不同富氧阶段下烧结矿的矿物组成及冶金性能,本文采用SEM-EDS和荷重软化熔滴设备研究在烧结前、中、后期采用富氧喷吹时烧结矿的矿相结构和软熔性能的变化规律和影响机理。试验结果表明:烧结矿的矿物组成主要包括赤铁矿、磁铁矿、铁酸钙、镁尖晶石和硅酸盐液相等;SEM观察和面扫结果表明,随着烧结过程富氧阶段的后移,SFCA(复合铁酸钙)的形态由板条状、针状向熔蚀状转变,与硅酸盐液相交织更加紧密,孔隙率下降,矿物结晶聚集性更强;XRD精修结果表明,随着富氧阶段的后移,铁酸钙在含铁矿物中的占比由76.04%下降到69.77%;不同富氧阶段得到烧结矿的软化开始温度(T 10)均在1180℃以上,软化区间为99~103℃,熔融区间为212~218℃,烧结矿的滴落质量从75.5 g变化为73.0 g最终升高到78.6 g,滴落速度在后期达到最大值0.85 g/min,原因是高熔点物质的减少和低熔点物质的形成;在烧结过程后期进行富氧喷吹时渣铁分离度高,铁的聚集性强,导致炉料的滴落性变强。 展开更多
关键词 富氧烧结 矿相结构 铁酸钙 熔滴性能 滴落速度
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膜下滴灌对麦茬夏花生土壤理化性状及肥料农学效率的影响 被引量:1
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作者 常维 刘颖 +7 位作者 彭振英 王建国 张佳蕾 么传训 闫振辉 郭峰 万书波 高文伟 《花生学报》 北大核心 2024年第1期52-58,64,共8页
为保障夏花生出苗和高产高效,本研究采用漫灌和膜下滴灌两种灌溉方式,系统研究了不同灌溉方式对夏花生田土壤理化性状、植株养分积累、肥料利用率及花生产量的影响。结果表明,膜下滴灌各土层地温在昼间7:00、9:00、11:30及14:30均高于漫... 为保障夏花生出苗和高产高效,本研究采用漫灌和膜下滴灌两种灌溉方式,系统研究了不同灌溉方式对夏花生田土壤理化性状、植株养分积累、肥料利用率及花生产量的影响。结果表明,膜下滴灌各土层地温在昼间7:00、9:00、11:30及14:30均高于漫灌,但滴灌处理土壤容重在0~15 cm土层显著低于漫灌。滴灌处理显著增加了0~30 cm土壤含水量,且提高了各土层的有机质含量和花生茎、叶、果壳中氮和磷含量,显著提高了花生荚果氮含量及积累量和花生茎、叶中磷和钾的积累量。与漫灌相比,滴灌处理氮、磷、钾肥的农学效率分别提高33.0%、33.9%、36.4%;夏花生产量显著提高,达17.8%。综合分析表明,膜下滴灌提高了花生产量,增加了经济效益,增强了作物对土壤养分与水分的有效利用。 展开更多
关键词 夏花生 膜下滴灌 土壤理化性状 产量 肥料利用效率
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焦炭反应性对块矿高炉冶金性能的影响研究 被引量:1
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作者 马星野 王刚 +5 位作者 李超 刘洋 隋月斯 钟祥云 徐国忠 白金锋 《煤质技术》 2024年第1期11-20,共10页
研究焦炭反应性对块矿在高炉中的熔滴性能和滴落物质量等冶金性能的影响,可全面解析不同反应性的焦炭在高炉内的实际劣化情况,为完善焦炭综合评价指标体系提供技术支撑。通过铁矿石荷重还原滴落性能实验检测装置,在CO_(2)/N_(2)体积分... 研究焦炭反应性对块矿在高炉中的熔滴性能和滴落物质量等冶金性能的影响,可全面解析不同反应性的焦炭在高炉内的实际劣化情况,为完善焦炭综合评价指标体系提供技术支撑。通过铁矿石荷重还原滴落性能实验检测装置,在CO_(2)/N_(2)体积分数比为30%∶70%条件下,研究5种不同热态反应性的焦炭以及混装焦炭对高炉操作和滴落物质量的影响。研究结果表明:焦炭反应性从22.0%升至50.2%,软化温度逐渐减小,软熔带增厚;当焦炭反应性小于35%时,随着反应性的增加则压差陡升温度降低、透气性变差,同时滴落物中会逐渐出现难还原的Fe2SiO_(4)和未彻底还原的FeO,滴落物中焦粉含量也逐渐增加;当焦炭反应性大于35%时,随着反应性的增加则压差陡升温度升高,透气性得到改善,难还原的Fe_(2)SiO_(4)和未彻底还原的FeO逐渐减少,滴落物中焦粉含量也逐渐减少。按一定比例搭配的混装焦炭在减小软熔带厚度、改善透气性、减少滴落物中焦粉含量等方面优于单一热态性质的焦炭。 展开更多
关键词 焦炭反应性 冶金性能 块矿 透气性 软熔带 熔滴性能 滴落物质量 焦粉含量
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穴贮砖对沙地梨树养分含量及土壤理化性质的影响 被引量:1
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作者 李延树 肖满 +3 位作者 赵丰云 张换换 张光鑫 于坤 《北方园艺》 CAS 北大核心 2024年第4期66-73,共8页
以‘爱宕’梨树为试材,采用设置对照(CK)、穴贮砖A(T1)、穴贮砖B(T2)3个处理,研究了不同处理对南疆重盐碱沙地条件下种植的‘爱宕’梨树养分含量、土壤理化性质的影响,以期为改善南疆果园水肥提供参考依据。结果表明:施用穴贮砖能显著... 以‘爱宕’梨树为试材,采用设置对照(CK)、穴贮砖A(T1)、穴贮砖B(T2)3个处理,研究了不同处理对南疆重盐碱沙地条件下种植的‘爱宕’梨树养分含量、土壤理化性质的影响,以期为改善南疆果园水肥提供参考依据。结果表明:施用穴贮砖能显著促进‘爱宕’生物量以及根茎叶中矿质营养元素含量;穴贮砖的施用显著提高了‘爱宕’梨树0~60 cm土层一个灌水周期的土壤含水量,提高了‘爱宕’梨品种0~80 cm土层中的全N、全P、全K、碱解氮、速效磷、速效钾含量及有机质含量,且在20~40 cm土层处T1、T2处理的提升效果最为显著,对其土壤的全N含量分别提高了20.42%、17.08%,全P含量分别提高了20.18%、12.65%,全K含量分别提高了18.58%、8.47%。综上所述,施加穴贮砖的T1、T2处理对南疆‘爱宕’梨树土壤理化性质及生长发育均有促进作用,促进效果表现为T1>T2>CK。 展开更多
关键词 穴贮滴灌 沙地 植株生长 理化性质
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冬灌制度对膜下滴灌棉田土壤理化性质、酶活性和微生物群落的影响 被引量:1
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作者 翟江蕊 丁邦新 +5 位作者 白云岗 柴仲平 刘洪波 郑明 丁宇 姚城阳 《干旱地区农业研究》 CSCD 北大核心 2024年第1期97-107,共11页
为明确不同冬灌制度的应用效果,以南疆膜下滴灌棉田为研究对象,选取每年冬灌处理(CK)、不冬灌处理(H1)及隔年冬灌处理(H2)3种冬灌制度,结合高通量测序技术对冬灌后土壤的理化性质、生物学性质以及微生物群落组成进行测定与分析。结果表... 为明确不同冬灌制度的应用效果,以南疆膜下滴灌棉田为研究对象,选取每年冬灌处理(CK)、不冬灌处理(H1)及隔年冬灌处理(H2)3种冬灌制度,结合高通量测序技术对冬灌后土壤的理化性质、生物学性质以及微生物群落组成进行测定与分析。结果表明:(1)各处理间0~20 cm土层土壤总盐含量无显著差异,与CK相比,H1和H2处理显著降低了脲酶(0.96%~1.35%)和转化酶活性(1.17%)以及微生物量氮含量(4.21%~7.03%),但H2处理显著提高了土壤有机质(14.30%)、全氮(14.29%)、全磷(4.55%)和全钾(7.40%)含量;H1处理显著降低了土壤有机质(6.03%)、全磷(12.5%)和水分(23.08%)含量,提高了微生物量碳氮比(7.37%)。(2)不同处理下细菌群落的丰度和多样性以及真菌群落的丰度无显著差异,但与CK相比,H1和H2处理显著提高了真菌的辛普森指数(4.12%~4.55%)。此外,H1较CK处理提高了细菌放线菌门(Actinobacteria)、酸杆菌门(Acidobacteria)、绿弯菌门(Chloroflexi)和真菌担子菌门(Basidiomycota)的相对丰度,H2较CK处理提高了细菌变形菌门(Proteobacteria)、芽单胞菌门(Gemmatimonadetes)和真菌被孢霉门(Mortierellomycota)的相对丰度。(3)相关性分析结果表明细菌的群落结构主要受微生物量碳含量的影响,真菌的群落结构和多样性分别受转化酶和脲酶活性的影响。在无法保证每年冬灌用水的情况下,隔年冬灌更有利于保障膜下滴灌棉田的土壤耕地质量。 展开更多
关键词 冬灌制度 膜下滴灌棉田 土壤微生物群落 土壤酶 土壤理化性质
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滴灌水肥一体化下施氮量和追氮时期对夏玉米籽粒品质及淀粉糊化特性的影响 被引量:2
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作者 刘帅 徐学欣 +5 位作者 孟繁港 徐宇凡 郝天佳 贾靖 张玉璐 赵长星 《西北农业学报》 CAS CSCD 北大核心 2024年第3期426-434,共9页
为探究黄淮海平原东部地区滴灌水肥一体化条件下,不同施氮量及追氮时期组合对夏玉米籽粒品质、淀粉糊化特性和产量的影响,选用玉米主推品种‘郑单958’为试验材料,设置施氮量180 kg/hm2(N1)和210 kg/hm2(N2)两个氮肥处理水平及拔节期+... 为探究黄淮海平原东部地区滴灌水肥一体化条件下,不同施氮量及追氮时期组合对夏玉米籽粒品质、淀粉糊化特性和产量的影响,选用玉米主推品种‘郑单958’为试验材料,设置施氮量180 kg/hm2(N1)和210 kg/hm2(N2)两个氮肥处理水平及拔节期+大喇叭口期(W1)、拔节期+开花期(W2)、拔节期+大喇叭口期+开花期(W3)3个不同追肥时期组合。结果表明:拔节期+大喇叭口期+开花期追肥处理(N1W3、N2W3)籽粒淀粉含量、粗蛋白含量、可溶性糖含量和产量显著高于其他处理,籽粒粗脂肪含量显著低于其他处理。相关性分析表明:籽粒支链淀粉含量与峰值黏度、谷值黏度、崩解值、最终黏度、回复值、粗蛋白含量、可溶性糖含量呈显著正相关,与糊化温度、峰值时间、粗脂肪含量呈显著负相关。增加追氮频次改善籽粒直链淀粉与支链淀粉的比例和淀粉的糊化特性,提高了籽粒品质。N1W3与N2W3相比,籽粒品质与淀粉糊化特性差异不显著,但是N1W3处理减少氮肥的投入,节约投入成本,为本试验的推荐处理。 展开更多
关键词 滴灌水肥一体化 夏玉米 施氮量 追氮时期 籽粒 品质 糊化特性 产量
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Magnesium-containing pellet regulating blast furnace ferrous burden interaction:softening-melting behavior and mechanism
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作者 Li-ming Ma Jian-liang Zhang +5 位作者 Yao-zu Wang Xiao-yong Ma Gui-lin Wang Zhuo Li Hui-qing Jiang Zheng-jian Liu 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2024年第7期1623-1635,共13页
MgO participates in all stages of sintering,pelletizing,and blast furnace ironmaking,and synergistically optimizing the distribution of MgO in ferrous burden can effectively enhance the interaction within the ferrous ... MgO participates in all stages of sintering,pelletizing,and blast furnace ironmaking,and synergistically optimizing the distribution of MgO in ferrous burden can effectively enhance the interaction within the ferrous burdens and optimize the softening-melting properties of the mixed burden.Magnesium-containing pellets mixed with low-MgO sinter or mixed with high-MgO sinter in the blast furnace ferrous burden structure have opposite softening-melting performance laws.When the structure of the ferrous burden is magnesium-containing pellets mixed with low-MgO sinter,the magnesium-containing pellets can enhance the interaction of the ferrous burden in the process of softening-melting,which can optimize the composition of the slag phase and improve the slag liquidity.When the structure of the ferrous burden is magnesium-containing pellets mixed with high-MgO sinter,the magnesium-containing pellets weaken the interaction of the ferrous burden in the process of softening-melting,increase the content of the high melting point solid-phase particles in the slag,lead to an increase in the viscosity of the slag and difficult separation of the slag and iron,and decrease the permeability of the charge layer.Therefore,to ensure good permeability of the mixed burden,the following measures are suggested:optimizing the MgO distribution of the ferrous burden,reducing the MgO content of the sinter to 1.96 wt.%,increasing the MgO content of the pellets to 1.03-1.30 wt.%,controlling the MgO/Al_(2)O_(3) ratio of the mixed burden within 1.15-1.32,narrowing the position of the cohesive zone,and maintaining an S value(permeability index)of approximately 150 kPa℃. 展开更多
关键词 IRONMAKING Ferrous burden softening-melting property INTERACTION Permeability Slag
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高硅金属化球团冶金性能研究与分析
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作者 陈得贵 雷鹏飞 吴振中 《甘肃冶金》 2024年第3期35-38,共4页
为了向高炉提供质量、性能稳定的高硅金属化球团,采用还原性试验、低温还原粉化性试验、熔滴试验等方法研究了高硅金属化球团各项冶金性能以及影响冶金性能的因素。研究表明:高硅金属化球团具有高金属化率、高铁品位、优良的还原性能、... 为了向高炉提供质量、性能稳定的高硅金属化球团,采用还原性试验、低温还原粉化性试验、熔滴试验等方法研究了高硅金属化球团各项冶金性能以及影响冶金性能的因素。研究表明:高硅金属化球团具有高金属化率、高铁品位、优良的还原性能、无低温还原粉化等优点,软熔性能随高硅金属化球团SiO_(2)含量升高而变差,而熔滴性能优于烧结矿和氧化球团矿。在高炉中配加一定比例的高硅金属化球团有利于降低焦比,从而降低高炉冶炼成本。但考虑到减小焦炭使用后影响高炉“骨架”,其配加比例待高炉进一步验证。 展开更多
关键词 高硅金属化球团 软熔滴落性能 金属化率 SiO_(2) 还原
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利用细磨钛块生产高钛球团试验研究
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作者 刘玉东 《山西冶金》 CAS 2024年第3期53-55,共3页
首钢京唐公司利用矿选细磨钛块得到的自产钛粉进行了生产高钛球团的试验研究,并进行钛球护炉实践。试验结果表明:在大型带式焙烧机焙烧工艺制度下,利用自产钛粉、承德细钛粉、进口铁精粉可生产w(TiO_(2))在13.0%左右、抗压强度良好的优... 首钢京唐公司利用矿选细磨钛块得到的自产钛粉进行了生产高钛球团的试验研究,并进行钛球护炉实践。试验结果表明:在大型带式焙烧机焙烧工艺制度下,利用自产钛粉、承德细钛粉、进口铁精粉可生产w(TiO_(2))在13.0%左右、抗压强度良好的优质高钛球团;所产高钛球团还原膨胀率10.5%,比常规球团低,炉料熔滴性能合适;与钛块直接入炉相比,熟料入炉更利于高炉顺行,实现了高炉在护炉条件下的高效稳定运行。 展开更多
关键词 高钛球团 自产钛粉 抗压强度 还原膨胀率 护炉方式
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Effect of organic binders on the activation and properties of indurated magnetite pellets 被引量:4
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作者 Cui Wang Chen-yang Xu +3 位作者 Zheng-jian Liu Yao-zu Wang Rong-rong Wang Li-ming Ma 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2021年第7期1145-1152,共8页
In the ironmaking process,the addition of an organic binder to replace a portion of bentonite has the potential to improve the per-formance of pellets.The interaction between original bentonite(OB)and organic binder w... In the ironmaking process,the addition of an organic binder to replace a portion of bentonite has the potential to improve the per-formance of pellets.The interaction between original bentonite(OB)and organic binder was investigated.Results indicated that the micromor-phology of organic composite bentonite(OCB)became porous and the infrared difference spectrum exhibited a curved shape.In addition,the residual burning rates of OB and organic binder were determined to be 82.72%and 2.30%,respectively.Finally,the influence of OCB on the properties of pellets was investigated.The compressive strength of OCB-added green pellets(14.7 N per pellet)was better than that of OB-ad-ded pellets(10.3 N per pellet).Moreover,the range of melting temperature of OCB-added green pellets(173℃)was narrower than that of OB-added pellets(198℃).The compressive strength of OCB-added green pellets increased from 2156 to 3156 N per pellet with the increase in roasting temperature from 1200 to 1250℃. 展开更多
关键词 PELLETS organic composite bentonite softening-melting property interaction behavior
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不同旱作节水灌溉条件对土壤理化性质及水稻产量的影响 被引量:4
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作者 何进宇 刘飞杨 +1 位作者 马波 王斌 《干旱地区农业研究》 CSCD 北大核心 2023年第1期121-127,共7页
为探索更为适合的水稻节水灌溉方式,于2017—2019年在宁夏暖泉农场开展大田试验,采用三因素对比设计,设置3种不同水稻节水灌溉方式(保墒旱直播MDDS、播后上水旱直播IDFS及覆膜滴灌旱作FMDI),研究了不同节水灌溉方式对水稻土壤理化性质... 为探索更为适合的水稻节水灌溉方式,于2017—2019年在宁夏暖泉农场开展大田试验,采用三因素对比设计,设置3种不同水稻节水灌溉方式(保墒旱直播MDDS、播后上水旱直播IDFS及覆膜滴灌旱作FMDI),研究了不同节水灌溉方式对水稻土壤理化性质及产量的影响。结果表明:FMDI分蘖期0~10 cm土层日平均地温3 a平均较IDFS和MDDS增加1.7℃(P<0.05);FMDI节水效果明显,在灌溉水平为80%田间持水量条件下,依然可以保持较高的土壤含水量(3年分别为20.1%、19.9%及20.3%);MDDS和IDFS土壤紧实度分别比FMDI平均高出1.74倍、1.77倍;FMDI处理连续3 a土壤有机质、全氮、全磷和全钾较其他2种耕作处理均有显著增加;FMDI处理有显著增产作用,其3 a经济产量和收获指数均最高,与MDDS相比,FMDI的水分利用效率3个年份增幅分别为54.0%、60.0%和56.0%。综上可知,覆膜滴灌旱作(FMDI)方式为适宜该地区水稻种植的蓄水保墒、增温稳温、培肥地力和高产高效的土壤耕作覆盖措施。 展开更多
关键词 水稻 旱作 节水灌溉 覆膜滴灌 土壤理化性质 产量
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生物炭和滴灌量对陕北榆林沙土性质和马铃薯生长的影响 被引量:1
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作者 杨玲 张富仓 +5 位作者 孙鑫 张少辉 王海东 ABDELGHANY Ahmed Elsayed 陈占飞 方玉川 《中国农业科技导报》 CAS CSCD 北大核心 2023年第3期221-233,共13页
生物炭具有改良土壤和节水保肥增产的效应,针对榆林沙土地持水保肥能力低的问题,将滴灌施肥与生物炭相结合,探究生物炭施用量和滴灌量对土壤理化性质和马铃薯生长的影响。大田试验设置2个滴灌量水平80%ET_(c)(W1)和100%ET_(c)(W2),5个... 生物炭具有改良土壤和节水保肥增产的效应,针对榆林沙土地持水保肥能力低的问题,将滴灌施肥与生物炭相结合,探究生物炭施用量和滴灌量对土壤理化性质和马铃薯生长的影响。大田试验设置2个滴灌量水平80%ET_(c)(W1)和100%ET_(c)(W2),5个生物炭水平0(B0)、10(B10)、20(B20)、30(B30)和50 t·hm^(-2)(B50),共10个处理,生育期内对土壤容重、孔隙度、有机碳、土壤水分、速效钾、硝态氮、干物质累积量及产量等进行观测。结果表明,随着生物炭施用量的增加,0—20 cm土层土壤容重显著降低,土壤孔隙度、土壤有机碳含量和土壤速效钾含量显著增加,土壤硝态氮含量和含水量先增加后减小。随着滴灌量增加,0—20 cm土层土壤容重降低,土壤孔隙度和含水量增大。生物炭的施用仅对生长后期马铃薯干物质累积量促进效果显著,表现为随着生物炭施用量的增加先增加后减少。马铃薯块茎产量和水分利用效率随着施炭量的增加先增加后减小,马铃薯块茎产量随着滴灌量的增大而增大,W2B30处理下最高,为58263.89 kg·hm^(-2),但与W1B20、W1B30、W2B20处理无显著差异,而水分利用效率最大值出现在W1B20处理,所以从产量、水分利用效率以及经济的角度考虑,W1B20可作为本试验条件下较适宜的水炭组合。 展开更多
关键词 马铃薯 生物炭 滴灌量 土壤性质 生长 产量
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灌水量和生物有机肥对滴灌枣田水盐动态及土壤养分属性的影响 被引量:2
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作者 张健利 王振华 +1 位作者 陈睿 刘茹华 《水土保持学报》 CSCD 北大核心 2023年第1期323-331,共9页
通过探究不同灌溉水平下施用生物有机肥对红枣田土壤水分、盐分及土壤养分属性的影响,为红枣种植提供适宜的水肥方案。设置2个灌溉水平(W1:6000 m^(3)/hm^(2),W2:6600 m^(3)/hm^(2)),3个基施水平(S1:1200 kg/hm^(2),S2:1650 kg/hm^(2),S... 通过探究不同灌溉水平下施用生物有机肥对红枣田土壤水分、盐分及土壤养分属性的影响,为红枣种植提供适宜的水肥方案。设置2个灌溉水平(W1:6000 m^(3)/hm^(2),W2:6600 m^(3)/hm^(2)),3个基施水平(S1:1200 kg/hm^(2),S2:1650 kg/hm^(2),S3:2100 kg/hm^(2)),以不施加生物有机肥作为对照(W1CK,W2CK),共8个处理,开展田间试验。施加生物有机肥可以提高土壤含水率、土壤有机质和总碳含量,且同一灌溉水平下,随施肥量的增加均表现为S3>S2>S1>CK。W1灌溉水平下,较CK处理相比,施加生物有机肥后0—150 cm土壤含水率、土壤有机质和总碳含量分别提高3.20%~17.97%,9.96%~20.31%,2.03%~5.42%,W2灌溉水平下,较CK处理相比,各项指标分别提高5.37%~20.19%,6.55%~21.18%,2.09%~6.34%。施加生物有机肥可以降低0—150 cm土壤盐分含量和土壤pH,且同一灌溉水平下,随施肥量的增加均表现为S3<S2<S1<CK。W1灌溉水平下,较CK处理相比,施加生物有机肥后0—150 cm土壤盐分含量和土壤pH分别降低7.70%~15.74%和0.86%~2.87%,W2灌溉水平下,较CK处理相比,各项指标分别降低8.90%~23.66%和0.96%~2.52%。不同水肥(生物有机肥)处理对比中,W1S3处理较当地常规灌溉处理(W2CK)0—150 cm土壤含水率、土壤有机质和总碳含量分别增加4.45%,21.85%,7.31%,土壤盐分含量和土壤pH分别降低2.59%和2.08%。结合当地水资源匮乏、水肥不易保持的特点,且考虑减小地下水污染风险,建议W1S3处理代替当地常规灌溉处理(W2CK)是较为适宜的水肥方案。 展开更多
关键词 滴灌红枣 生物有机肥 灌溉水平 土壤水盐 土壤养分属性
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膜下滴灌氮肥运筹对花生光合和抗氧化特性的影响 被引量:3
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作者 张自茹 鹿锦浩 +4 位作者 邹晓霞 张晓军 于晓娜 王月福 司彤 《花生学报》 北大核心 2023年第1期44-51,71,共9页
为研究膜下滴灌氮肥运筹对花生光合和抗氧化特性的影响,在氮肥总量不变的情况下,以花生品种青花7号为材料,设置了6种氮肥运筹方案。各处理基施∶花针期追肥∶结荚期追肥的氮肥比例分别为5∶0∶0(T2),3∶1∶1(T3),2∶2∶1(T4),1∶2∶2(T5... 为研究膜下滴灌氮肥运筹对花生光合和抗氧化特性的影响,在氮肥总量不变的情况下,以花生品种青花7号为材料,设置了6种氮肥运筹方案。各处理基施∶花针期追肥∶结荚期追肥的氮肥比例分别为5∶0∶0(T2),3∶1∶1(T3),2∶2∶1(T4),1∶2∶2(T5),1∶3∶1(T6),0∶3∶2(T7),以不施氮肥处理(T1)为对照。结果表明:与其他处理相比,T6处理显著提高了不同生育时期叶片的光合速率、气孔导度、叶绿素含量、超氧化物歧化酶、过氧化物酶和过氧化氢酶活性,显著降低了叶片丙二醛含量。特别是在花生生长发育后期仍然使叶片保持较高的光合速率和抗氧化酶活性,降低膜脂过氧化程度,延缓叶片衰老,从而利于产量的形成。综上,本研究条件下,青花7号以基施∶花针期追肥∶结荚期追肥按1∶3∶1比例为最优氮肥运筹方案。 展开更多
关键词 花生 膜下滴灌 氮肥运筹 光合特性 抗氧化特性
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渤中M构造太古界潜山裂缝型储层流体性质随钻识别方法
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作者 李战奎 刘松宇 +3 位作者 高强勇 管宝滦 马福罡 张恒 《录井工程》 2023年第4期73-78,共6页
渤中凹陷太古界潜山储层因受岩性和构造等多重因素影响,油气分布不均,储层非均质性强,流体性质复杂,录井过程中面临着流体性质难判断、储层含水不确定等难题。通过分析渤中M构造太古界潜山录井特征,建立了渤中M构造太古界潜山裂缝型储... 渤中凹陷太古界潜山储层因受岩性和构造等多重因素影响,油气分布不均,储层非均质性强,流体性质复杂,录井过程中面临着流体性质难判断、储层含水不确定等难题。通过分析渤中M构造太古界潜山录井特征,建立了渤中M构造太古界潜山裂缝型储层流体性质随钻识别方法,采用气测组分纵向趋势法及图板法、裂缝含油气丰度交会图板法及图谱法,结合荧光显示情况,综合判断油层和水层,切实提高了太古界潜山流体性质识别的准确率。该方法在渤中M构造潜山储层流体性质评价中应用效果明显,能够为勘探决策提供重要依据,具有推广意义。 展开更多
关键词 太古界 裂缝储层 含水图板 含油气丰度 荧光滴照 渤中M构造 流体性质
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