生物质焦焙烧还原低品位软锰矿及其动力学

采用生物质焦和活性炭粉作还原剂,在管式炉中进行了低品位软锰矿焙烧还原对比试验.分别研究了焙烧温度、焙烧时间、生物质焦用量等条件对软锰矿还原率的影响,对焙烧产物进行了X射线衍射分析.结果表明,生物质焦在焙烧时间和还原效率上优于活性炭粉;软锰矿焙烧还原依次经历Mn O2→Mn2O3→Mn3O4→Mn O过程;在焙烧温度为800℃,焙烧时间为50 min,生物质焦用量为10%时,软锰矿还原率可达98%以上,在此基础上导出了还原动力学方程,并证实还原过程由界面化学反应控制,表观活化能为43.896 k J·mol-1.     

高硫煤矸石焙烧固硫的Box-Behnken响应面法优化研究

为实现高硫煤矸石焙烧过程中的高效固硫，采用工业废渣硼泥作为固硫剂，对煤矸石进行固硫试验.针对单因素试验的不足，采用Box-Behnken响应面法探索固硫剂用量、焙烧温度、焙烧保温时间等对煤矸石固硫率的影响，明确了各因素之间的交互作用.研究结果表明：在固硫剂中镁与煤矸石中硫的质量比(m_Mg/m_S)为9,焙烧温度620℃、焙烧保温时间100 min时，煤矸石固硫率达到89.35%.对煤矸石固硫影响最大的因素为固硫剂用量，其次为焙烧温度，焙烧保温时间(2 h内)的影响较小.焙烧温度和固硫剂用量之间具有显著的交互作用.通过该方法优化的煤矸石固硫工艺可为高硫煤矸石的资源化利用提供一定技术支撑.     

天然低品位氧化锰矿生产活性二氧化锰

为了改变优质电池原料短缺的状况和充分利用低品位锰矿资源 ,研究了天然低品位二氧化锰矿在添加少量无污染添加剂的条件下 ,在 71 0℃下焙烧 2h ,可使矿石中MnO2 转化为Mn2 O3 .其转化率达 99 5 %以上 .同时对焙烧产物进行岐化反应所用的酸介质、酸用量和反应时间与歧化作用的关系进行了研究 .并对氯酸钠氧化歧化液中Mn2 的氧化效果进行了分析 ,提出了分步氧化歧化液中Mn2 的新工艺 .     

中浓度NOx废气治理的新工艺研究

研究了用软锰矿吸收中浓度NOx,吸收母液经净化、浓缩、结晶产出MnNO3,MnNO3热分解产出纯MnO2 (产品 )和高浓度NOx 气体 ,该气体用水吸收生产硝酸 (产品 ) ,吸收尾气返回软锰矿吸收的新工艺 .研究表明该工艺技术可行 ,具有显著经济效益和环境效益 .     

两段焙烧强化含铼低品位钼精矿的氧化分离

针对氧化焙烧法处理低品位钼精矿中存在的钼氧化不完全、铼难挥发分离、有价元素(钼和铼)回收率较低等问题,采用焙烧试验、热重、物相和显微结构分析等研究两段焙烧强化氧化含铼低品位钼精矿中钼、铼的工艺及原理。研究结果表明:两段焙烧是实现钼、铼充分氧化的有效处理工艺。该工艺通过调节两段的温度和气流方向,改善气固对流条件,减小氧化焙烧过程的氧化差异,促进含钼和含铼矿物的深度氧化。在最佳工艺条件下(Ⅰ段焙烧温度675℃,焙烧时间1 h,气流由下至上;Ⅱ段焙烧温度625℃,焙烧时间2 h,气流由上至下),最终焙烧过程铼挥发率可达77.21%,焙烧产物中可溶钼质量分数提高到83.98%。相较于一段焙烧,两段焙烧各层产物的物相组成及微观结构一致,不存在未氧化的辉钼矿(MoS2)和氧化不完全的低价钼氧化物(MoO2),钼主要以MoO3形式存在。     

强化氧化对石煤钙化焙烧提钒的影响

研究石煤钙化焙烧参数对提钒效果的影响,确定合理的焙烧参数:当焙烧温度为950℃,焙烧时间3 h,碳酸钙添加量为质量分数6%时,石煤焙烧料中钒的浸出率为63%。在此基础上研究增强氧化对提钒效果的影响,比较通空气和添加MnO2这2种情况下提钒的效果。用化学物相分析和钒价态分析等技术探讨加强氧化提高钒浸出率的原因。空气通入速度为0.48 L/h时,钒的浸出率为69%;MnO2添加量(质量分数)为3%时,钒浸出率为68%。研究结果表明,加强氧化后矿石的结构被破坏,V5+含量提高,生成更多易溶于酸的钒酸钙类物质。     

MnO_2-CuO-CeO_2复合催化剂的制备及处理化工集装罐清洗废水的应用

针对非均相贵重金属催化剂成本高,非均相过渡金属催化剂性能良好、成本低,但使用寿命短、易流失的特点,研制高效复合MnO2-Cu O-CeO2非均相过渡金属催化剂.采用正交实验对催化剂制备过程中的n(Cu)∶n(Mn)、Ce的摩尔分数、焙烧温度、焙烧时间进行探讨,确定最佳制备条件,并对其结构和组成通过扫描电镜分析、X射线衍射分析及热重分析进行表征.用该催化剂催化氧化模拟苯酚废水,对催化剂用量、氧化剂H2O2用量、反应温度、反应时间进行优化,确定最佳反应条件并利用其进行降解化工集装罐清洗废水的应用研究.研究表明催化剂MnO2-Cu O-CeO2的最佳制备条件为:n(Cu)∶n(Mn)=4∶6、Ce的摩尔分数为10%、焙烧温度为600,℃、焙烧时间为4,h.催化氧化法处理苯酚废水的最佳工艺参数:催化剂用量0.8,g/L、H2O2用量与COD比值为3、反应温度170,℃、反应时间1,h.化工集装罐清洗废水COD去除效果显著,COD去除率达到95%左右.     

低品位辉钼矿氧化焙烧的研究

本实验探讨研究了低品位辉钼矿(8.37%)在焙烧时温度、时间、通氧气次数、多种碱性熔剂对钼转化率的影响.实验结果表明:温度为625℃,时间为2 h,通氧气2次的条件下,Na2CO3∶N aN O 3∶M o=2:0.5:1(物质的量比)进行焙烧,此时转化率最高为96.76%     

调质鸡蛋壳的脱硫性能

用NaOH、C_2H_5OH、Na_2CO_3和NaCl等对鸡蛋壳进行了调质,研究调质鸡蛋壳的脱硫效果,结果表明最佳的蛋壳调质剂为NaOH,经NaOH调质后蛋壳粉的最佳固硫温度为1 000℃,最佳,n(Ca):n(S)=2:1.实验比较了同一条件下NaOH调质蛋壳固硫剂、蛤壳和蚝壳等天然固硫剂在1 000℃下的脱硫效果,结果表明NaOH调质蛋壳的脱硫率最高,达到88.1%.SEM实验结果表明,氢氧化钠不但可以除去蛋壳的生物膜还能改善蛋壳表面的微观结构,有效地提高了蛋壳的脱硫率.     

氧化亚铁硫杆菌耦合砷黄铁矿还原浸出软锰矿

将氧化亚铁硫杆菌(T.f)用于砷黄铁矿与软锰矿共同浸出,设置无菌体系作为对照,提出有氧和无氧条件下Fe As S-Mn O2的反应模型。研究结果表明:氧化亚铁硫杆菌对砷黄铁矿还原浸出软锰矿具有明显的催化作用,在砷黄铁矿与软锰矿的质量比为1:3.6、反应p H为1.8的最优条件下,有菌体系下锰的浸出率达99%,后续金的氰化浸出率达95%以上;Mn2+会抑制细菌的生长,当ρ(Mn2+)≥30 g/L时,Mn2+对细菌有致死作用;从软锰矿与砷黄铁矿的循环伏安曲线可看出两矿均有明显的氧化还原峰,且在有菌的条件下两矿的电化学活性要远远比无菌条件下的强;T.f菌的作用机理是催化Fe2+和Fe3+的相互转化。     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

橡胶颗粒沥青混合料低温抗裂性试验研究

以AC-13级配为基础,将橡胶颗粒代替部分集料掺入混合料中,以低温弯曲试验为评价方法对不同橡胶颗粒掺量下沥青混合料的低温抗裂性进行研究,并引入应变能密度值对混合料的低温抗裂性进行综合评价.试验结果表明:橡胶颗粒沥青混合料试件的破坏微应变均超过2 300,满足冬寒区的技术指标;无论是否掺加橡胶颗粒,随着温度的下降,沥青混合料破坏时的最大弯拉强度增大,弯拉应变降低,劲度模量增大;弯曲应变能密度在胶粒掺量为1%左右时具有较大的弯曲应变能密度值,此时橡胶颗粒沥青混合料具有较好的低温抗裂性.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

Quantitative trait loci （QTLs） for quality traits related to protein and starch in wheat

Quality traits in wheat （Triticum aestirum L.） were studied by quantitative trait locus （QTL） analysis in a recombinant inbred line （RIL） population, a set of 131 lines derived from Chuan 35050 × Shannong 483 cross （ChSh）. Grains from RILs were assayed for 21 quality traits related to protein and starch. A total of 35 putative QTLs for 19 traits with a single QTL explaining 7.99-40.52% of phenotypic variations were detected on 10 chromosomes, 1D, 2A, 2D, 3B, 3D, 5A, 6A, 6B, 6D, and 7B. The additive effects of 30 QTLs were positive, contributed by Chuan 35050, the remaining 5 QTLs were negative with the additive effect contributed by Shannong 483. For protein traits, 15 QTLs were obtained and most of them were located on chromosomes 1 D, 3B and 6D, while 20 QTLs for starch traits were detected and most of them were located on chromosomes 3D, 6B and 7B. Only 7 QTLs for protein and starch traits were co-located in three regions on chromosomes 1D, 2A and 2D. These protein and starch trait QTLs showed a distinct distribution pattern in certain regions and chromosomes. Twenty-two QTLs were clustered in 6 regions of 5 chromosomes. Two QTL clusters for protein traits were located on chromosomes 1D and 3B, respectively, three clusters for starch traits on chromosomes 3D, 6B and 7B, and one cluster including protein and starch traits on chromosome 1D.     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.