Journal of Kunming Metallurgy College

Study on Preparation of Carbon Blocks by Spark Plasma Sintering

TENG Yu, LI Yingjuan, SONG Qunling, LI Yuexiwei

2020, 36(1): 1. doi:１０．３９６９／ｊ．ｉｓｓｎ．１００９－０４７９．２０２０．０１．００１

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Conventional carbon products require complicated methods and long synthesis cycle due to un.stable quality and high cost of the products. Evenly mixed carbonaceous powder and coal tar pitch binderwere pressed into a mold, while temperature was controllable by using spark plasma integrated applicationsystem in which the current, voltage and pulse frequency were regulated. Compression bulks were sin-tered to form sintering bulks with certain volume density and mechanical strength. Plasma sintering meth.od breakthroughs the defects of traditional craftsmanship and can shorten synthesis cycle, which is an en-vironmental friendly method and expected to be used in carbon industry in the future.

Design and Application of Pre-iron Full Cost Optimization Model

YIN Yehua, CHEN Fugang, LI Yuncai

2020, 36(1): 6. doi:１０．３９６９／ｊ．ｉｓｓｎ．１００９－０４７９．２０２０．０１．００２

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In this paper, the design of a batching model is put forward. In the model, the maximum prof-it of molten iron is used as the objective function. The paper studies the inventory ore , sinter and pellet ,molten iron and slag and some other industrial index and some key factors such as process cost. It mayshed lights on the work in reducing costs in ore production the planned procurement of ore.

Selection and Optimization of Measuring Conditions for Determination of Indium in High-iron Sphalerite by Flame Atomic Absorption Spectrometry

LI Li, WANG Jinliang, DU Zhonglin, NING Mencui, WU Wenbin

2020, 36(1): 12. doi:１０．３９６９／ｊ．ｉｓｓｎ．１００９－０４７９．２０２０．０１．００３

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The composition of high-speed iron sphalerite is complex, and there are many interference fac-tors in the determination of low-content indium. The paper made a study of the experimental conditions olthe instrument working conditions , acid medium and its concentration , etc. for the determination of indium content in high iron content sphalerite by flame atomic absorption spectrometry. The research resultsshow that at a wavelength of 303. 94 nm , an air-acetylene flame , a burner slit length of 100 mm , a widthof 0. 4 mm, and a test solution injection volume of 6mL / min , the optimal working conditions of the in-strument are: lamp current 5 A; burner height 7 cm; acetylene flow rate 1.8 ~ 2.0 L / min: air flowrate 6. 0L / min; the best acidic medium for the sample to be tested is nitric acid medium with concen-tration ( V / V)% =10% .

Study on Controlled Factors of Selenium Speciation in Surface Soil of Lichuan City in Hubei Province

CHENG Yong, CHEN Yunfeng, YUE Yongqiang, LIAO Kangcen, XU Keyuan

2020, 36(1): 16. doi:１０．３９６９／ｊ．ｉｓｓｎ．１００９－０４７９．２０２０．０１．００４

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The migration, transformation and ecological effects of selenium in soil are not only related tothe total content of selenium in soil, but also to the existing speciation of selenium in soil. In this paper,the relationship between the form of selenium element and its total content, organic matter content and pHvalue in surface soil of Lichuan City, Hubei Province was studied. The results show that the content ofselenium in the non-selenium rich soil in the study area was higher than that in the selenium rich soil ex-cept for the average content of humic acid bound and strong organic bou nd. The content of organic matterin soil is positively correlated with the content of selenium in water - soluble state, carbonate combinedstate and strong organic combined state, the correlation coefficient is more than 0. 3, and slightly posi-tively correlated with the content of ion-exchange state, humic acid combined state, iron manganese com-bined state and residue state. Soil pH has a significant effect on ion exchange and exchangeable state,and in alkaline soil, the available state content of selenium is higher.

Application of Subjective and Objective Joint Empowerment in the Evaluation of Mine Ventilation System

LIN Jifei, ZHANG Xi, DONG Juan, WANG Yujun, XIA Jianbo'CHENG Yong, NIE Qi

2020, 36(1): 22. doi:１０．３９６９／ｊ．ｉｓｓｎ．１００９－０４７９．２０２０．０１．００５

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The determination of the index weight has an important impact on the evaluation results of themine ventilation system. The subjective and objective joint weighting method is to comprehensively deter-mine the subjective and objective weights by using the three-scale analytic hierarchy process and the coef-ficient of variation method. lt objectively considers the variability of expert opinions and indicators , whichreflects the relative importance of each indicator, fully reflects the objective actual situation of each indi-cator. and avoids deviations in judgment results.

Geological Features and Prospecting Indicators of Qiadong Copper Deposit in Tongren County in Qinghai Province

GAN Xiaorui, LYU Pinhan, QIN Zhimin

2020, 36(1): 29. doi:１０．３９６９／ｊ．ｉｓｓｎ．１００９－０４７９．２０２０．０１．００６

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With the mining of Qiadong copper mine in Tongren County, inghai Province, there hasbeen no comprehensive study on its deposit geology, and no systematic summary on its genesis and pros.pecting indicators. Based on the previous geological work and the results of field geological investigationin the mining area, this paper concludes that the copper mine in Oiadong, Tongren County, QinghaiProvince , is mainly located in the formation of the lower Triassic system in the upper part of the Longwuhe River. The formation of the deposit is closely related to magmatism and volcanism. It can be conclu.ded that the genesis of Oiadong copper mine in Tongren County, Qinghai Province is a volcanic eruptionsedimentary deposit. The strata in the upper lithologic section of Longwuhe River formation, malachitemineralization and skarnization are important prospecting indicators. So it provides an important referencefor the future production and prospecting of the mine.

Geological Characteristics and Ore-Controlling Conditions of the Wanzijie Ore Section in Laochang Ore Field

Yu Han

2020, 36(1): 35. doi:１０．３９６９／ｊ．ｉｓｓｎ．１００９－０４７９．２０２０．０１．００７

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There are many types of ore deposits in the Wanzijie ore section of the Laochang ore field. Themain factors for ore formation are the favorable configuration of the lithology, ore structure and magmaticactivity, which control the output of the ore deposit. Applying traditional geological theories, the paperstudies the geological characteristics, ore-controlling conditions, and ore body morphology of the areathrough the analysis of ore-forming geological conditions, geological characteristics and metallogenic regu.arity of the ore section. Having a clear view of the ore-controlling factors can shed insights on the futurework about geological prospecting in the area.

Analysis on the Influence of Mining Deformation in Lefeng Coal Mine on Shanghai - Kunming Railway Triple Tunnel

LUO Yunyong, MAO Jianing, WANG Shaoliu

2020, 36(1): 43. doi:１０．３９６９／ｊ．ｉｓｓｎ．１００９－０４７９．２０２０．０１．００８

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Shanghai-Kunming railway triple tunnel passes underground 703 m from the eastern peripheryof Lefeng coal mine of Xuanwei Ruifengheng Mineral Products Co. , LTD. The deformation of miningmatters not only safety of railway operation, but also the sustainability of Lefeng coal mine. This articlecalculates the horizontal displacement and vertical displacement of tunnel lining structure after miningLefeng C3 coal seam through ANSYS R18 based on finite element analysis method from the perspective ofmining principles and tunnel structure mechanics. It also checks some factors such as bending moment.axial force, and safety factor check. After securing Lephone C3 coal seam mining, it is safe to exploitShanghai-Kunming railway triple tunnel.

Cross Section Modulation Based on Spatial Plane Fitting

WANG Jianying, HUANG Dewu

2020, 36(1): 51. doi:１０．３９６９／ｊ．ｉｓｓｎ．１００９－０４７９．２０２０．０１．００９基于空间平面拟合的横断

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The survey point of the section shall be located on the section line , but the survey point “devi-ates”from the section line due to external conditions and some other factors. How to make full use of theso-called “deviation”data to draw the section line and its engineering application is very important. Inview of the above problems, this paper proposes a section modulation method based on the spatial planefitting method. Compared with the trigonometric network method and contour method in CASS, the resultsof the three methods are consistent, and the elevation difference meets the requirements of the specifica-tion. However, this method does not need to measure points on the section line, and can resample pointson the section line for fitting, especially suitable for river section measurement. This method is worth pop-ularizing and applying.

Implementation and Analysis of Quality Control of Land Survey Results

LUO Wensheng, WANG Xiaoli, LI Shunmei

2020, 36(1): 56. doi:１０．３９６９／ｊ．ｉｓｓｎ．１００９－０４７９．２０２０．０１．０１０

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Taking the third national land survey project in Shuangjiang County as an example, the paperelaborates the process and mode of quality control in the data production process of the land survey resultsin detail, and studies and discusses the way and implementation of the quality control of the land surveyresults. The quality control management of the survey project provides some new ideas.

Construction of Basic Geospatial Database in Campus

MA Juan, ZHENG Song, WANG Dongjing

2020, 36(1): 63. doi:１０．３９６９／ｊ．ｉｓｓｎ．１００９－０４７９．２０２０．０１．０１１

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Based on the service groups of basic geospatial database in campus, this paper has built E-Rmodel, designed feature dataset, feature class and encoding scheme. Using ArcClS and existing datasources , it has built the basic geospatial database in campus which can provides background data supportfor the construction of geographical information system of campus and even higher level of Smart Campus.

Realization of Spatial Layout Optimization of County Ecological Conservation Red Line

LUO Canpei, CHEN Aimei

2020, 36(1): 70. doi:１０．３９６９／ｊ．ｉｓｓｎ．１００９－０４７９．２０２０．０１．０１２

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The ecological conservation red line is an important guarantee for the construction of ecologicacivilization and the sustainable development of economy and society. It has established the control bound.ary of ecological space, and further tightened the management and restriction of ecological space. Howev.er, during the implementation process from 2018 to 2019 , there appeared many problems such as incompatibility with social and economic development, implementation difficulties , and conflicts with other protection red lines. According to the general idea ofmulti-regulation , management combination", the spatial layout of ecological conservation red line is optimized and adjusted, and the rules of management andcontrol are improved to ensure that ecological functions are not reduced, the area is not reduced, the nature is not changed, and authority, science, and the rule of law are defined. The results of the implementation can provide reference for the preparation of the land space planning and the definition of the ec-ological red line survey in Suijiang County.

Response Analysis Between Land Use Change and Water Quality in Xingyun Lake Basin

ZHANG Xiaolun, SHAO Yanyan, CHEN Zhan, ZHANG Fucun, WAN Baofeng, CHEN Guoping, NIE Juntang

2020, 36(1): 77. doi:１０．３９６９／ｊ．ｉｓｓｎ．１００９－０４７９．２０２０．０１．０１３

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In order to understand the relationship between land use change and water quality in theXingyun Lake basin, the paper interpreted land use information from high-resolution remote sensing images in the past 30 years, which was divided into seven land use types: farmland, forest land, grassland.construction land, transportation land, water and bare land, then analyzed the correlation between landuse types and water quality. The results indicate that 1) the main land use types in the study area are fiveypes: farmland, forest land, grassland, water and construction land, and arious land types have changed significantly during the development of Xingyun Lake basin.Construction land and transportationland increased significantly , which mainly occupying farmland and grassland. Grassland and bare land isgradually decreasing, and a large amount of grassland is converted into farmland and construction. Waterfluctuates within a small range, and forest land has become fragmented. Farmland has increased, whosemain source of inflow is grassland and forest land, and the main flow is construction land and transportation land. 2) The water pollution indicators of Xingyun Lake did not change significantly before 1995and the water quality was classified as Class ll. Since 2000, the water pollution index has gradually in.creased, and water quality had dropped to ClassIV. After 2005 , the water deteriorated significantly, andwater quality dropped to Class V , which was in a moderate-severe eutrophic state. 3) There was a strongpositive correlation between water pollution indicator and farmland, construction land, transportation landin Xingyun Lake basin, which indicated that the deterioration of water quality may be the result of thecombined effects of agricultural non-point source pollution, domestic and industrial pollution sourcesThere was a signifcant negative correlation between water pollution indicator and grassland, bare landwhich indicated that the permeable underlying mat had significant interception and absorption effects onpollutants.

Research in Hydraulic Hybrid Vehicles Based on Fuzzy PID Control Strategy

ZHOU Peng, LI Tengzhong, LI Yuan, YANG Jing, WU Xiangji

2020, 36(1): 83. doi:１０．３９６９／ｊ．ｉｓｓｎ．１００９－０４７９．２０２０．０１．０１４

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The current situation of the automobile industry was introduced in this paper. The fuel econormy were analyzed based on the control strategy and the simple fuzzy control strategy of PID. It is foundthat it fails to meet the requirements of energy conservation and emission reduction in some special vehicleconditions ( such as rapid acceleration, emergency braking etc.) of the simulation cycle. The controstrategy based on Fuzzy PID was researched in this paper, which was applied to the Hydraulic Hybrid Vehicle. The simulation results showed: the Fuzzy PID met the verification requirements, the important fueleconomy indexes, such as the distribution of the torque working point of the automobile engine. It isproved to be an effective control strategy under the Fuzzy PID control strategy.

Designing Method and Procedure of Transmission Shaft

RUAN Xuyan, BAI Haixia, DENG Jing, ZHOU Wen

2020, 36(1): 89. doi:１０．３９６９／ｊ．ｉｓｓｎ．１００９－０４７９．２０２０．０１．０１５

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A machine consists of frame , transmission shaft, detection device , leg and some other parts. Asthe core of the machine, transmission shaft accounts a lot for the operation of machines. In designing thetransmission shaft, the rationality of the shaft itself and other parts connected should also be considered. Inthe design process, the stiffness, strength of the shaft and the fixation mode of the parts connected with theshaft should be comprehensively considered based on the design input. Taking the design process of theransmission shaft of the pallet code extension as an example, this paper briefly introduces the method andsteps of designing the transmission shaft , and puts forward the problems that should be paid attention to indesigning the structure, calculating strength , rigidity as well as drawing of the transmission shaft.

The Generation Method of an Optimized Stylized Edge

XIE Wanyu, YANG Ming, LI Qingqin', XU Dan

2020, 36(1): 95. doi:１０．３９６９／ｊ．ｉｓｓｎ．１００９－０４７９．２０２０．０１．０１６

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Non-Photorealistic Rendering ( referred to as NPR) technology is a popular research field incomputer graphics in recent years, it usually involves the digital simulation of various stylized drawing ed-ges . In this paper, the generation method of an optimized stylized edge is proposed, the edge owns ab-stract linear feature and can simulate engraved edges. The paper improves the smooth model of the EdgeTangent Flow ( referred to as ETF) , which generates the abstract linear flow consisting of strong edge in.formation. The stylized edge generated by the abstract linear flow also owns the abstract linear character-istic ,and it is made up of strong edge information.

Design and Research of the Third National Land Survey Comprehensive Management System in Yunnan Province

ZHANG Ming, QU Yunfeng, HUANG Yanfeng, GUO Fei

2020, 36(1): 102. doi:１０．３９６９／ｊ．ｉｓｓｎ．１００９－０４７９．２０２０．０１．０１７

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This paper introduces the design ideas, framework and software development method of theThird National Land Survey comprehensive management system in Yunnan Province. The system is basedon B/S structure, MVC framework , HTML5 language, CSS3 style , JavaScript and national encryption al-gorithm , integrates the PostgreSOL database support, and through the close integration of working units.supervision units,quality inspection units, quality inspection lead departments and management depart-ments in the Third National Land Surveying procedure to achieve the informationization of the managementand service.

Study on Mechanism of Rainwater Pipe Fouling and Clogging

ZHANG Song, ZHANG Yucai, LI Wei, LIU Xue’e, ZHU Bo, CHEN Zixiang

2020, 36(1): 110. doi:１０．３９６９／ｊ．ｉｓｓｎ．１００９－０４７９．２０２０．０１．０１８

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The paper analyzed the composition of fouling in the rainwater pipe, measured the seepage andCa ( OH), concentration. The results show that the composition of fouling in the rainwater pipe was calcite crystal. When rainwater penetrates into the concrete, Ca ( OH), dissolves in water and form CaCO.fouling in the rainwater pipe. Repairing water proof layer is the fundamental solution to prevent scaling.

Comparison of Denitrifying Phosphorus Removal Performance in Two Sewage Treatment Technologies

CHEN Tengshu, LIN Ketao, XU Jianyu

2020, 36(1): 114. doi:１０．３９６９／ｊ．ｉｓｓｎ．１００９－０４７９．２０２０．０１．０１９

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An experimental study on anaerobic phosphorus release, aerobic phosphorus uptake and denitrifying phosphorus removal by activated sludge from three municipal wastewater treatment plants usingdifferent processes was carried out to determine the denitrifying phosphorus removal ability and comparethe performances. The processes included the Carrousel system with anoxic-oxic stage ( A/O) and thecyclic activated sludge technology ( CAST). The results show that the efficiency of aerobic and denitrifying phosphorus accumulation in CAST process is 3. 34 mgP/h and 2. 23 mgP/h, respectively. The effi.ciency of aerobic and denitrifying phosphorus accumulation in A/0 process is 2. 54 mgP/h and 0. 83mgP/h. The proportion of denitrifying phosphorus accumulating bacteria and aerobic phosphorus accumu-lating bacteria in CAST and A/0 processes were 66. 8% and 24.9% respectively. The denitrifyingphosphorus accumulating capacity of CAST process was better than that of A/0 process.

Construction of Curriculum Resources for Designing Courses Based on Project Teaching: a Case Study of Mine Designing Principles

XIA JianboYE Jiamian

2020, 36(1): 118. doi:１０．３９６９／ｊ．ｉｓｓｎ．１００９－０４７９．２０２０．０１．０２０

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This paper analyses the necessity of constructing teaching resource database through project-based teaching in higher vocational colleges. In view of the problems existing in the construction of re-source database at present, it makes a case study of the course “ Mine Designing Principles”, analysesthe principles and characteristics of the course, and studies the designing of major teaching resources. ltalso expounds the designing ideas and construction principles of the database, and introduces the con·struction method and content of the “four databases and one line”in teaching the “ Mine Designing Principles”course. The teaching resource database can be used in teaching practices through the resourceplatform, so as to improve teaching goals and promote students'independent learning.

Reform in Teaching Methods of E-commerce Logistics Based on Simulation Technology

TAN Jiyu, LIU Gaochang

2020, 36(1): 122. doi:１０．３９６９／ｊ．ｉｓｓｎ．１００９－０４７９．２０２０．０１．０２１

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The development of Internet technology forces the reformation of curiculum teaching. For thepracticality and application of e-commerce logistics, it is urgent for colleges and universities to reformtheir teaching system, teaching modes, assessment methods and intelligent hardware construction, so asto promote the integration of theory and practice in course teaching and improve the talent training.

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