Fractal Principle of Mineral Deposit Size Forecasting and Its Implication for Gold Resource Potential Evaluation in China

Mineralization distributions are very heterogeneous in nature. As large orsuperlarge mineral deposits are quite rare whether in time or in space, it is difficult to detectall the largest mineral deposits in a region in a limited period of time owing to the restriction oftechnology and exploration degrees-this is called 'not all discovered'. However, all discoveredlarge, especially superlarge, mineral deposits generally have a complete census in the geologicalliteratures. On the other hand, not all discovered small mineral deposits are recorded in thegeological literatures because for economic reasons people have not much interest in them-this iscalled 'not all recorded'. This practice often results in the observation truncations, that is, thedata points near the two ends in an observable population, which is obtained by fitting a power lawsize-frequency distribution to discovered mineral deposits in a given region, show concave-downdeparture from the correlation line fitted. The authors suggest that the size and number ofundiscovered deposits may be forecast by fitting a fractal size distribution to discovered mineraldeposit sizes between the upper and lower truncation observations and then extrapolating thescale-independent area to deposit sizes larger than the upper truncation limit. Based on thestatistical results obtained by the fractal size-frequency distributions of 394 discovered golddeposits with sizes greater than 2 t Au in China and 83 known gold deposits with sizes over 0.3 t Auin the Jiaodong area of China, the authors forecast according to the present commercial standardsfor gold ores that the total resources of undiscovered gold deposits ranging in tonnage from 50 to2000 t Au are more than 4500 tin China, and that in the Jiaodong area of China the total resourcesof potential gold deposits with sizes in the range of 30 to 650 t Au are about 700 t.

Typhoon events recorded in coastal lagoon deposits,southeastern Hainan Island

Coastal lagoon deposits provide evidence for the magnitude and frequency of past tropical cyclones prior to instrumental records and historical documentation.In the present study,we attempt to analyze the sedimentary records containing typhoon information for the northern South China Sea region.For this purpose,sediment cores were collected from two coastal lagoons in the southeastern Hainan Island,and were analyzed in laboratory to derive the data sets about grain size,organic and inorganic carbon contents,and deposition rates.The grain size and organic-inorganic carbon data were used to formulate the proxies of typhoon events.The deposition rates,as calculated using the CRS 210 Pb method,are around 0.5 mm/a for both lagoons,on the basis of which an age model is established.Within the cores,sedimentary layers associated with 35 typhoon events have been identified.On such a basis,a 350 year history of local typhoon activities is reconstructed by incorporating the 210 Pb dating results,typhoon-induced sedimentation patterns and the historical documents.A comparison of the frequency of typhoon occurrence with the regional climate records indicates that the observed changes in tropical cyclone activity patterns,as revealed by the lagoon sedimentary records,may be related to El Ni？o,Pacific Decadal Oscillation（PDO）,North Atlantic Oscillation（NAO）,sunspot,and other potential climate drivers that affect the tropical cyclone variability.This study demonstrates that the sedimentary record of storms can be analyzed in combination with historical documents,to provide meaningful information on past storm activities and their long-term variability.

Effects of Material Composition and Water Content on the Mechanical Properties of Landslide Deposits Triggered by the Wenchuan Earthquake

Abundant landslide deposits were triggered by the Wenchuan earthquake, providing a rich source of material for subsequent debris flows or slope failures under rainfall conditions. A good understanding of the physical and mechanical properties of the landslide deposits is very important to the research on slope failure mechanisms and the initiation of debris flow. Laboratory biaxial compression tests are used to study the material compositions and water content impacts on the mechanical properties of landslide deposits, and a discrete element method （a bond-contact model） is used to study the particle stiffness, bond force, friction coefficient and confining stress impact on the mechanical behaviors and the relationships between the numerical and experimental parameters. The experimental results show that the failure stress of landslide deposits is decreased with increasing content of fine particles and also with increased water content, especially at the initial increasing stage. Cohesion of the saturated landslide deposits is increased, but the friction angle is decreased with the increase in the fine particle content. Shear strength parameters （the cohesion and friction angle） are decreased with the increasing water content at the initial increasing stage, and then, they slowly decrease. There is a critical value of the water content at 5%-7% （in weight） for the failure stress and shear strength parameters of the landslide deposits. Quadratic equations are presented to describe the relation between the bond force and cohesion, and the numerical friction coefficient and the experimental friction angle.

Intensification of the East Asian Monsoon in Southern China at about300-400 kaBP Inferred from Eolian Deposits in the Middle-lower Reaches of the Yangtze River

In the East Asian monsoon region, eolian deposits widely distributed in the middle-lower reaches of the Yantgze River are among the best materials available for studies on Quaternary climate change in the subtropical zone of Southern China. Typical eolian deposits in this region include upper Xiashu Loess （XL） and underlying Vermiculated Red Soil （VRS） layers. In this paper, chronological and paleoclimatic studies are conducted on an eolian deposit sequence near Jiujiang （J J） city in northern Jiangxi province. A magnetostratigraphic study, combined with optically stimulated luminescence （OSL） dating, is conducted on the JJ section and provides further evidence that eolian deposits in the middle-lower reaches of the Yangtze River have been formed since the late Early Pleistocene, and that the boundary age between the XL and VRS layers is about 300-400 kaBP. In grain-size records of the JJ section, the median grain-size and content of the 〉30μn size fraction increase sharply after 300-400 kaBP, representing an East Asian winter monsoon intensification event. Further pollen analysis reveals differing pollen assemblages before and after 300-400 kaBP： there is an evident increase in plants adapted to grow in a warm humid environment after 300-400 kaBP, implying an increase in precipitation caused by intensification of the East Asian summer monsoon. Global ice volume and uplift of the Tibet Plateau （TP） are regarded as crucial factors influencing variations of the East Asian monsoon on a long-term scale. The deep-sea JlSO record, which reflects variations in global ice volume, shows no obvious change after 300-400 kaBP. Moreover, the influence of global ice volume changes on the East Asian summer and winter monsoons is inverse; the global ice volume increase （decrease） implies a strengthened （weakened） winter monsoon and weakened （strengthened） summer monsoon. We therefore interpret the coupled intensifications of the East Asian summer and winter monsoons at about 300-400 kaBP to the uplift of the TP in the Middle Pleistocene. This climate event is also documented in eolian deposits from the southern margin of the Chinese Loess Plateau （CLP） and from the desert-loess transitional belt. However, it is not recorded in the loess-paleosol sequences from the central part of the CLP, thereby indicating differing climate responses to TP uplift in different regions, which requires further study.

The depositional Environment at Shuidonggou Locality 2 in Northwest China at ～72-18 kaBP

Shuidonggou site has abundant Paleolithic remains of Late Pleistocene deposition. Studying the evolution of depositional environments is essential to the comprehensive understanding of the living conditions of ancient populations. To reconstruct the depositional environment at Shuidonggou, we carried out archaeological excavations and collected systematic deposition samples at the key position of Shuidonggou Locality 2 for grain size analysis and sporopollen statistics. The environmental evolution around the Shuidonggou site generally underwent four stages at ~72-18 kaBP. During the first stage （~72-41 kaBP）, the river developed with gravel and sand stratums. During the second stage （41-34 kaBP）, a swamp with numerous aquatic plants formed. In the third stage （34-29 kaBP）, site formation was characterized by shallow lake depositional conditions; the climate was relatively warm and humid. The marginal bank depositional conditions deteriorated during the fourth stage （29-18 kaBP）, and the site underwent several dry events; the climate also became drier and colder.

Gold Occurrence and Ore Genesis, Yata Micro-|Disseminated Gold Deposit, Guizhou, Southwest China

The mode of occurrence of gold in the Yata micro\|disseminated gold deposit is approached through chemical phase studies coupled with ore\|dressing monitoring and micro\|beam analysis. The results showed that gold occurred for the most part as ultra\|microscopic particles adsorbed on the surfaces or fracture planes of pyrite and other sulphides. The proportions of gold of different occurrences were estimated solutions containing nanometer\|sized gold particles were prepared following the hydrolysis\|reduction procedure and the adsorption of nanometer\|sized gold on ordinary sulphides and rocks was experimentally determined. It is evident that sulphides are good adsorbents of gold and this is consistent with geological observations.

Grain size characteristics and environmental indication of the sediments around Great Wall Station,Antarctica

The Great Wall Station of China(62°13′S,58°58′W) is located at the Fildes Peninsula of King George Island,South Shetland Islands,Antarctica.Sediments in the area can be divided into glacial,periglacial,fluvial lacustrine and littoral deposits in origin.Analysis of the fine particals(below 3.52 mm) shows obviously difference among grain size composition,frequency curve,accumulative curve and scatter diagram.In order of periglacial glacial fluvial littoral deposit,sand increases,silt and clay decreases;sorting changes from poor to good;mean grain size is at very fine fine medium coarse sand respectively;skewness changes from very positive to near symmetric.Scatter diagram of grain size parameters shows difference in the sediments.Variation among frequency curves reflects processing and forming condition of the sediments.The fluvial and littoral deposits follow normal distribution,they are straight lines in normal accumulative diagram.The glacial and periglacial deposits follow Rosin's distribution,they are straight lines in Rosin's accumulative diagram.

Prediction and Analysis of Deposition Efficiency of Plasma Spray Coating Using Artificial Intelligence Method

Modern industrial technologies call for the development of novel materials with improved surface properties, lower costs and environmentally suitable processes. Plasma spray coating process has become a subject of intense research which attempts to create functional layers on the surface is obviously the most economical way to provide high per- formance to machinery and industrial equipments. The present work aims at developing and studying the industrial wastes (Flay-ash, Quartz and illmenite composite mixture) as the coating material, which is to be deposited on Mild Steel and Copper substrates. To study and evaluate Coating deposition efficiency, artificial neural network analysis (ANN) technique is used. By this quality control technique, it is sufficient to describe approximation complex of in- ter-relationships of operating parameters in atmospheric plasma spray process. ANN technique helps in saving time and resources for experimental trials. The aim of this work is to outline a procedure for selecting an appropriate input vec- tors in ANN coating efficiency models, based on statistical pre-processing of the experimental data set. This methodology can provide deep understanding of various co-relationships across multiple scales of length and time, which could be essential for improvement of product and process performance. The deposition efficiency of coatings has a strong dependence on input power level, particle size of the feed material, powder feed rate and torch to substrate distance. ANN experimental results indicate that the projection network has good generalization capability to optimize the deposition efficiency, when an appropriate size of training set and network is utilized.

叶片风振响应空间运动姿态及雾滴沉积效果分析

风送喷雾技术可有效提升雾滴向冠层内部的输送能力,增强雾滴在树冠各处的覆盖均匀性,但气流对单一叶片的动态响应及雾滴沉积的细观作用效果还不清楚。该研究通过风洞内的稳定气流对单一梨树叶片进行风振响应试验,追踪叶片表面代表叶片形态的4个特征点,构建模拟叶片的三维空间运动模型,分析研究特征点的空间运动轨迹及叶面雾滴沉积效果。研究结果表明:低于临界风振响应速度,叶片基本稳定于一定抬升角位置,大于等于临界风振响应速度,叶片的稳定状态才会破坏,出现大幅度的摆动与翻转的复合运动响应,且运动响应具有周期性特征。对应5、7和9 m/s风速下,在一个周期内叶尖的空间运动总行程分别为180.61、1140.77、766.33 mm,叶片总扭转角分别为290.7°、896.8°、716.2°。雾滴沉积试验中,风速低于5m/s,雾滴主要沉积于面向气流方向的叶面,随着气流速度增大,正面雾滴沉积覆盖率由43.2%逐渐减小为10.3%;大于等于风速5m/s时,叶片正反两表面均有雾滴沉积,但雾滴主要沉积亲水性较好的叶片反面上。提出了应用叶片的空间运动瞬时位置的实际坐标构建模拟叶片位姿,可清晰体现叶片的空间位姿及运动过程。研究结果可进一步揭示风送喷雾过程中载雾气流与动态叶片的沉积作用机理。

FINE CONTROL OF HZSM-5'S PORE-OPENING SIZE BY A NEW CVD METHOD

A new CVD method without vacuum condition（CVDWV）was designed in this study,ithad been found that by modifying the flow rate of the carrier gas（N2）and the temperature of sur-face reaction,silicon saturator and sample tube,the amount of silica deposited on the external sur-face of the zeolite could be precisely controlled,The changes in the physicochemical properties ofzeolite,such as pore-opening size,acidity and reaction property were investigated.The results ob-tained showed that:modification of the improved CVD method did not change the internal structureand acidity of the zeolite,but could bring about significant change of pore-opening size and reactionproperty as desired.

On Physical and Mechanical Behavior of Natural Marine Intermediate Deposits

Coastal structures may be built on natural sedimentary intermediate grounds, which mainly consist of silty soils and fine sandy soils. In this study, extensive field and laboratory tests were performed on the natural marine intermediate deposits to demonstrate the difference in behavior between natural marine clayey soils and natural marine intermediate deposits. The natural intermediate deposits have almost the same ratios of natural water content to liquid limit as those of the soft natural marine clays, but the former have much higher in-situ strength and sensitivity than the latter. The research results indicate that grain size distributions of soils affect significantly tip resistance obtained in field cone penetration tests. The mechanical parameters of natural marine intermediate deposits are also significantly affected by sample disturbance due to their high sensitivity and relatively large permeability. Unconfined compression shear tests largely underestimate the strength of natural marine intermediate soils. The triaxial consolidated compression shear tests with simulated in-situ confined pressure give results much better than those of uncomfined compression shear tests.

激光熔化沉积Al-Mg-Sc-Zr合金晶粒尺寸预测及成形工艺优化

通过激光熔化沉积试验分析了工艺条件(送粉速度、扫描速度和激光功率)对Al-Mg-Sc-Zr合金晶粒尺寸的影响,构建了晶粒尺寸预测模型,优化了成形工艺参数,给出了工艺参数最佳区间。结果表明,相较于激光功率和扫描速度,送粉速度对晶粒尺寸的影响最为显著;随着成形能量密度的增加,合金晶粒尺寸呈现出先减小后增大的演变趋势;采用回归方程构建的晶粒尺寸-工艺参数关系模型能准确预测不同工艺条件下激光熔化沉积Al-Mg-Sc-Zr合金的平均晶粒尺寸,相对误差小于2%;通过响应面分析得到工艺参数最佳区间为:送粉速度2.8~3 g·min^(-1)、激光功率1000~1050 W、扫描速度4~5 mm·s^(-1)。

滇西南沧源岩溶洞穴硝洞堆积物来源分析

岩溶洞穴是第四纪时期古人类活动的重要场所。开展岩溶洞穴碎屑沉积物的沉积特征及物质来源分析,对其沉积环境演变历史及古人类活动研究都具有重要意义。本文在了解硝洞洞穴及其周围不同沉积物黏土矿物特征的基础上,结合硝洞洞穴沉积物的粒度和矿物学等特征对其物质来源进行了分析。结果表明:硝洞洞穴沉积物的主要来源为洞穴外地表较高处的沉积物,其通过片流作用被带入洞穴内进行堆积。其次,还同时堆积有少量灰岩不溶性物质及其经历进一步风化成壤作用后形成的物质,总体可能存在4次进一步的风化成壤作用。此外,也有洞壁崩塌的石灰岩角砾和岩块参与堆积,总体存在4次大量灰岩角砾或岩块参与堆积过程,而最近一次的堆积作用,显然受到了人类活动的影响。

甘肃青土湖地区不同类型沙丘的表沙理化特征及其环境意义

沙丘表层沉积物的理化特征在揭示风沙的来源、沉积过程、风化作用等方面具有重要作用。本研究采用野外实地采样和实验室分析方法分析了甘肃青土湖地区不同类型沙丘表层沉积物的粒度和地球化学特征。结果表明:(1)青土湖地区沙丘表层沉积物以细砂为优势粒级,平均含量达72.08%,其次为极细砂,黏粒成分很少。频率分布曲线为单峰分布,概率累积曲线表现为三段式,反映出沉积环境较为稳定。(2)研究区沙丘表层沉积物常量元素以SiO2为主,平均含量为76.40%,其次为Al2O3和CaO,平均含量分别为5.05%、3.74%。微量元素以Cr、Mn、Co、Sr、Ba、Ti、Ce和P为主,平均含量均>100 mg/L。(3)Y、Zr和Y/Zr、Rb/Zr双变量图、A-CNK-FM图解表明巴丹吉林沙漠和腾格里沙漠为其沙源。风沙搬运过程中的磨蚀、风选作用是研究区富集Fe、Mg元素的主要原因。此外,下伏湖相沉积物就地起砂,石羊河冲积物也为其提供了部分沙物质。(4)A-CN-K和A-CNK-FM三角模式图表明研究区风化程度较弱,处于初期脱Na、Ca阶段。在沙丘固定过程中成土作用增强但淋溶作用减小,这是由于植被的影响导致半固定、固定沙丘Na、Ca含量较高。

策勒河下游风积地貌沉积物粒度特征及沙源分析

沉积物的粒度特征记载了丰富的环境变化信息,对研究沙漠治理和荒漠化防治具有重要意义。运用粒度分析、粒级-标准偏差法和Sahu成因判别等研究方法进行分析,研究了不同风积地貌沉积物粒度特征和沉积环境的稳定性。结果表明:(1)新月形沙丘、灌丛沙丘和低裸平沙地表层沉积物均以中砂、细砂、极细砂为优势粒级,新月形沙丘表层沉积物平均粒径最粗,为270.42μm,灌丛沙丘表层沉积物平均粒径最细,为95.60μm。(2)三种地貌类型沉积物分选性较差,占比分别为74.47%、90.47%和66.7%,新月形沙丘表层沉积物呈现负偏分布、中等峰态,灌丛沙丘和低裸平沙地表层沉积物呈现对称分布、中等峰态和窄峰态。(3)三种不同风积地貌环境敏感组分集中在22.4~399μm之内,该组分对气候变化较为敏感,更能反应沉积环境的变化,表明该区域风沙活动强烈,沉积环境主体为风成沉积环境。(4)灌丛沙丘表层沉积物完全属于风成环境沉积,新月形沙丘和低裸平沙地表层沉积物既有风成环境沉积,又有河流环境沉积。

基于图像识别估算碎裂岩崩体积方法研究

西南山区碎裂岩崩灾害频发,为了准确模拟岩崩运动过程,量化岩崩风险大小,必须明确崩塌体体积,但目前尚无一种有效且可靠的碎裂岩崩体积估算方法。基于此,提出一种基于图像识别技术的碎裂岩崩体积精细估算方法,并以2020年雅西高速石棉姚河坝崩塌为例进行应用与验证。通过现场实测与无人机贴近摄影测量方法,确定岩崩堆积区分区及采样区;利用图像处理开源软件(ImagePy),建立块体快速识别步骤,提取块体等效粒径、周长和面积等特征参数;构建基于块体体积分布的碎裂岩崩体积估算方法;以岩崩实例进行方法应用与验证。研究结果表明:(1)ImagePy软件对块体图像识别速度快、精度高;(2)获取的块体体积分布曲线与现场实测体积分布规律近一致;(3)姚河坝岩崩体积估算值占三维点云数据差分法获取体积近80%。综上,利用图像识别技术进行碎裂岩崩块体体积提取与体积估算的方法是可行的,并具有高效率与准确性优势,可应用于碎裂岩崩灾害快速评估与风险量化评价,统计的块体体积分布可为碎裂研究提供数据支撑。

不同计算方法的云南省永胜县下院滑坡堰塞湖沉积物粒度特征及沉积历史重建

【研究目的】滑坡堰塞湖灾害链危害大,其形成和溃决过程中受外部环境影响大。堰塞湖沉积物作为记录堰塞湖全生命周期的载体,具有良好的古环境和古气候的指示作用,采用最佳解析方法对其进行解读有利于还原沉积物沉积过程及古环境变化。【研究方法】通过野外调查采样和室内测试分析相结合的方法,采用图解法和矩值法计算下堰塞湖沉积物统计特征的适用性问题,使用粒度结合有机质含量重建了堰塞湖沉积环境,对堰塞湖的发育过程进行还原。【研究结果】(1)堰塞湖沉积物分层沉积层序明显,为单一水动力湖相沉积,物质来源稳定,非多物源沉积;综合有机质变化和沉积物粒度特征表明该堰塞湖经历了4次干湿周期,在气候和地质活动的共同作用下至少存在3次堵塞−泄流沉积过程,估算沉积旋回周期约为1750 a,该沉积历史应该是断裂带长期复杂的活动和气候−河流共同作用的结果。(2)通过对图解法和矩值法进行统计分析结果表明,两种方法对平均粒径和分选系数评价一致性较好,可直接进行替换;矩值法对偏态峰态整体计算结果比图解法大,在使用中需进行线性代换。由于描述参照值的缘故,偏态、峰态在统计表述中有所偏差。【结论】堰塞湖沉积物粒径分布简单,采用图解法计算更加便捷,与其他沉积物对比方便,推荐图解法对堰塞湖沉积进行计算。研究结果表明粒度特征对堰塞湖的沉积和溃决过程以及滑坡灾害对气候变化的响应研究具有一定的指导意义,可为还原该堰塞湖沉积期的古环境和古气候提供理论依据。

不同污染天气下大气颗粒物及化学成分干沉降通量的粒径演变特征

干湿沉降是大气污染物的主要汇机制,也是生态系统重要的物质来源。相比于湿沉降,干沉降通量直接测量难度大,研究进展相对缓慢,稀缺的研究资料与其重要性不匹配。基于北京2013年1月大气颗粒物粒径分级采样观测资料,利用经典的大气阻力模型计算了不同粒径段颗粒物的干沉降速度(Vd),重点分析了重污染期间颗粒物的干沉降通量及其化学成分的粒径变化。结果显示,所研究的8个粒径段颗粒物Vd变化范围为0.037-0.50 cm·s^(−1),高风速和低相对湿度的气象条件有利于Vd的增加;不同粒径段的颗粒物Vd最大值出现在5.8-9μm,最小值出现在0.65-1.1μm或1.1-2.1μm;以最小值出现的1.1μm为界,随着颗粒物粒径变小或增大,Vd均呈现增加的趋势,反映了不同粒径段颗粒物干沉降微物理机制的差异。观测期间,大气颗粒物总的干沉降通量变化范围为9.41-108.71 mg·m^(−2)·d^(−1),平均值为(36.65±25.61)mg·m^(−2)·d^(−1),粗粒子干沉降通量的变化更多受颗粒物浓度的影响而细粒子干沉降通量的变化更多受Vd影响;在重污染天气时,所有粒径段的颗粒物浓度和干沉降通量均有所上升,其中硝酸盐、铵盐和硫酸盐等二次化学组分的浓度和干沉降通量峰值所在的粒径出现了由小变大的“粒径转移”现象。2022年1月大气重污染期间依然能观测到类似的“粒径转移”特征,说明这种现象具有一定的持续性和普遍性。迄今为止,北京及周边地区尚未彻底消除重污染天气,这种天气很可能会增加大气颗粒物及化学成分的干沉降通量,进而通过跨介质迁移间接影响水体、土壤和植被等生态环境质量。

新疆吾合沙鲁铜矿床含铜岩系安居安组下段砂岩粒度特征与沉积环境分析

吾合沙鲁铜矿床位于新疆西南天山乌恰前陆盆地北缘,该盆地内沉积大套中生代—新生代陆相砂体,是该区域铅锌、铜、铀等砂岩型矿床的重要含矿岩系。关于该矿床沉积学方面的研究工作薄弱,长期制约着对区域成矿规律的深入认识及对矿床勘查的有效指导。本文以吾合沙鲁铜矿床含铜岩系新近系中新统安居安组下段碎屑沉积岩为主要研究对象,以沉积学、层序地层学、岩相古地理学和碎屑岩石学理论为指导,系统采集矿区内安居安组下段砂岩粒度分析样品,采用碎屑岩粒度分析测试手段,对沉积物展开细致和深入的研究。结果表明,安居安组沉积相类型与辫状河三角洲相沉积特征一致,在各岩性段内识别出辫状河三角洲平原和辫状河三角洲前缘2种沉积亚相及分流河道砂坝、陆上天然堤、水下分流河道、分流间湾、河口砂坝及远砂坝6种沉积微相。安居安组下段为研究区主要富铜层位,其中水下分流河道微相和分流河道砂坝微相,可作为吾合沙鲁地区铜矿勘查的重点目标。研究成果可为吾合沙鲁铜矿周边及外围资源远景预测提供找矿思路,为区域探寻砂岩型铜矿提供新的借鉴。

航空发动机积垢和在线清洗技术研究进展

随着中国民航事业的发展,航空发动机的经济性与安全性至关重要。压气机积垢是造成航空发动机性能降低的主要因素之一,发动机在线清洗是目前经济有效的除垢手段,积垢的清除效果与清洗系统参数密切相关。系统总结了发动机积垢机理和清除技术研究现状,分析评述了用于评估积垢效应的模型,考虑垢质颗粒运动过程中的聚合、破碎和表面侵蚀,进一步量化沉积效应和时间尺度,改进数值模拟过程、提高模型精度等方面尚需优化。同时对在线清洗参数和清洗时机进行了深入讨论,指出了不同在线清洗参数和清洗时机的清洗效果目前还处于初步研究阶段,还应加强对射流系统的喷雾覆盖范围、液滴尺寸和清洗频率的研究,建议在积垢程度、不同压气机尺寸和在线清洗经济性等方面进一步优化清洗工艺参数和清洗时机。