2013年01期目次

  • Application of tri-hydrocyclone separator in coarse slime separation

    CUI Guang-wen,GUO Qi-kai,SONG Guo-yang,SUN Ming-yang(College of Chemical and Environmental Engineering,Shandong University of Science and Technology,Qingdao 266590,China)

    Introduce the status of coarse slime separation and common separation equipments.Analyse the advantages and disadvantages of dense medium cyclone,spiral separator,TBS,hydrocyclone separator in industrial application.Introduce tri-hydrocyclone separator developed by Shandong University of Science and Technology.To test its performance,carried out laboratory experiments,and analysed the results.The results show that,the tri-hydrocyclone separator is highly effective,especially for +0.2 mm coarse slime,the imperfection can reach 0.088.

    2013 01 v.19 [Abstract][OnlineView][Download 660K]

  • Mechanism of microorganism regulating mineral surface properties

    ZHANG Dong-chen1,2,WANG Tao1,2,HOU Zhi-xiang1,2,ZHOU Qian-qian1,2(1.School of Material Science and Engineering,Anhui University of Science and Technology,Huainan 232001,China; 2.Key Laboratory of Modern Mining Engineering of Anhui Province,Huainan 232001,China)

    In the course of biological mineral processing,the biological actions occur mainly on mineral surface.The electrical property,hydrophobic property and wettability of mineral surface can be modified by microorganism,which create favorable conditions for biological mineral processing.Interface effects come down to a series of complex physical and chemical process between mineral and microorganism.Study the electrostatic force,specific adsorption and adhesive attraction between mineral and microorganism,as well as energy substances requisite for some types of microorganism.Investigate the characteristics that microorganism act on mineral surface and change law of mineral surface proferties.The results provide the theoretical reference for biological modification of mineral surface.

    2013 01 v.19 [Abstract][OnlineView][Download 693K]

  • Coal preparation process selection for Chahasu coal preparation plant

    WANG Ju-long1,ZHENG Gao-chao1,ZHANG Qing2(1.Schenck Process(Tianjin) Industrial Technology Co.,Ltd.,Beijing 100010,China; 2.Chahasu Coal Preparation Plant,Guodian Jiantou Inner Mongolia Energy Co.,Ltd.,Erdos 017209,China)

    The analysis of raw coal indicate that,the gangue in raw coal may already degrade in water.The little slime in raw coal,the better shatter strength.The size composition of raw coal is rather changeable and is affected by numerous factors,so the capacity of lump coal process system should be large enough.The raw coal is easy to prepare,so should select simple preparation method,such as high density gangue exhaust process.Given the raw coal properties and characteristics of various coal preparation methods,adopt dense medium preparation method for Chahasu coal preparation plant.The equipments selection also follows the relevant principle.The production capacity is designed to 15 Mt/a for completion at once.Analyse the process layout for inside and outside main workshop,further indicate the design is reasonable and low energy consumption.

    2013 01 v.19 [Abstract][OnlineView][Download 570K]

  • Design features of Changping coal preparation plant

    ZHANG Xin-long1,PANG Ding-feng2,HOU Jin-bing3,LI En-qiang4,ZHANG Li4,KE Xue-jie4(1.Coal Mining and Designing Department,Tiandi Science & Technology Co.,Ltd.,Beijing 100013,China; 2.Taggart(Beijing) Engineering Co.,Ltd.,Beijing 100022,China; 3.Changping Mining Co.,Ltd.,Gaoping 048400,China; 4.Dadi Engineering Development Group Co.,Ltd.,Beijing 100102,China)

    Introduce the design characteristics of Changping coal preparation plant from the aspects of separation methods,technological process,equipments selection,process layout and automation control.Analyse the design thought of the coal preparation plant.The guiding ideology consists of reasonable design,advanced technique,reliable system,integral complement,convenient management,benefits maximization.Adopt advanced separation method and technological process.The main separation equipment is well known.The degree of automation is high that forms reasonable and efficient process.The products structure can be flexibly adjusted.The design of Changping coal preparation plant provide reference for other coal preparation plants.

    2013 01 v.19 [Abstract][OnlineView][Download 469K]

  • Separation of coal fines with dry-type pneumatic separator

    WANG Guang-ze,ZHU Zi-qi,ZHANG Ning(Baode Coal Preparation Plant,Preparation Center of Shendong Coal Group Co.,Ltd.,Baode 036600,China)

    The most common method of treating fine slime is pressure filtration without separation,so the slime products with high moisture need further treatment.To reduce moisture of fine slime,improve its calorific value,lighten the load of coal slurry preparation system,provide the dry-type pneumatic separation method.Introduce its principles and feasibility theoretically.Analyse the basic processes,find that this method can avoid part of fine slime into primary cleaning system.Setting the separating room as ideal condition,carry out force analysis of single coal powder granule,calculate the main separating parameters in separation room.Primary benefits estimation indicate that,dry-type pneumatic separator for coal fines worth further promotion due to its considerable social and economic benefits.

    2013 01 v.19 [Abstract][OnlineView][Download 469K]

  • Coal preparation process optimization for Guojiawan coal preparation plant

    HUANG Kai-lin,LIU Jian-hua(Guojiawan Coal Mine,Yulin Shenhua Energy Co.,Ltd.,Yulin 719315,China)

    To better optimize coal preparation process of Guojiawan coal preparation plant,analyse raw coal properties,requirements of users for products,the maximum yield and economic benefits and the like.Introduce the specific optimization methods involving simplifying process,decreasing secondary slime,enriching product structure,selecting equipments more scientifically.The optimization also include equipments configuration,coal sales system and workshops.

    2013 01 v.19 [Abstract][OnlineView][Download 465K]

  • Improvement of wear-resistant materials used in dense-medium separator in Linxi coal preparation plant

    ZHANG Liang-liang(Linxi Coal Preparation Plant,Kailuan Group Co.,Ltd.,Tangshan 063104,China)

    The pipes of dense-medium separator and walls of some collecting boxes always be worn out in Linxi coal preparation plant.To resolve these problems,adopt KMTBCr26 high chromium cast iron wear-resistant pipes and Al2O3 ceramic-lined composite pipes.Analyse the technical parameters and performance of these two pipes.The results show that,the abrasive resistance of the latter is better than that of the former,while the welding property is poorer,its link rely on flanged links,that leads to large amount of maintenance.So adopt the former at last.Replace the worn-out part of aerating agitation device,the pipes of underflow in gangue picking process,manganese steel lining of clean coal collecting box as well as various of damageable pipes with the KMTBCr26 high chromium cast iron,these measures prolong the service life of equipments,decrease the maintenance and cost,increase the clean coal yield,investigate the economic benefits with annualized cost estimates method,the method helps to save cost 19012 yuan per year.

    2013 01 v.19 [Abstract][OnlineView][Download 609K]

  • Economic and technical feasibility of raw coal desliming before preparation

    TAO Ya-dong(Preparation Center,Shenhua Shendong Coal Group Co.,Ltd.,Shenmu 719315,China)

    There are lots of problems existed in slurry process in Shenhua Shendong Coal Group Co.,Ltd.,including high moisture in mixed coal,large fine slime in clean coal,frequent coal freezing in vehicle in the winter.Analyse the feasibility of desliming before preparation.To select the proper desliming technology,taking Daliuta coal preparation plant as sample,investigate the changes of slime content,materials cost and slime processing facilities before and after desliming.Classify the coal size by 25 mm and 13 mm,the benefits increase by 1.46×108 yuan and 1.07×108 yuan respectively.The results show that,these measures decrease the load of slime processing system and processing expense,simplify the technological process,improve the slack coal treatment capacity and separation precision of clean coal,the yield of commercial coal increase by 1.02 percent,the moisture of mixed coal decrease by 1.04 percent.

    2013 01 v.19 [Abstract][OnlineView][Download 651K]

  • Transformation of coal preparation process for Qinglongsi coal preparation plant

    ZHU Qi-jun(Guojiawan Coal Mine,Yulin Shenhua Energy Co.,Ltd.,Yulin 719315,China)

    The products structure of Qinglongsi coal preparation plant is established by analysing coal quality of Qinglongsi mining area,screening and float-and-sink data,washability evaluation.The higher and lower limit of separation is 50 mm and 0.25 mm.After transformation,50 to 0 mm raw coal is separated by non-pressure three-product dense medium cyclone.For 1.5 to 0.25 mm coarse clean coal and coarse middlings,first recycle,then mix into clean coal or middlings,-0.25 mm fine coal is dehydrated by pressure filter.After dehydration,the fine slime can be mixed into middlings or gangue,another handing method is that,first dry part or whole fine slime,then mix into middlings.The results show that,the optimization design has great advantages.

    2013 01 v.19 [Abstract][OnlineView][Download 753K]

  • Research and application of multifunctional starch-based briquette binder

    WANG Ren-zhang1,NIU Yu1,2,YANG Qing-shuang1,LIN Peng1,HUANG Kui1,CUI Guo-xing1,SU Zhi-zhong1(1.College of Resources and Chemical Engineering,Sanming University,Sanming 365004,China; 2.College of Chemistry and Chemical Engineering,Fuzhou University,Fuzhou 350000,China)

    Taking briquette stability as research target,investigate the influence of NaOH and corn starch reaction time,reaction temperature,reaction ratio,ratio of anthracite and binder on briquette stability.Mixing modified starch binder with anthracite,optimize preparation conditions of briquette with single factor experiments.The best binder preparation conditions is that the time is 1 h,heat-treatment temperature is 75 ℃,corn starch and water ratio is 1:14,NaOH and water ratio is 1:100,the binder mass is 13 percent of egg-shaped briquette mass.Under the best preparation condition,the compression resistance can reach 1032.4 Newton.

    2013 01 v.19 [Abstract][OnlineView][Download 664K]

  • Techniques for low rank coal dewatering and drying

    ZHU Chuan1,2,YANG Xiao-yu1,SHAO Xun1,2(1.Beijing Research Institute of Coal Chemistry,China Coal Research Institute,Beijing 100013,China; 2.State Key Laboratory of High Efficient Mining and Clean Utilization of Coal Resources (China Coal Research Institute),Beijing 100013,China)

    Introduce the techniques for low rank coal evaporation drying,such as rotary drying,fluid bed drying,entrained-flow drying.Meanwhile,study some non-evaporation dewatering technologies,including thermal dehydration,mechanical dewatering and UBC low rank coal upgrading technology.Emphasize the technological processes,technical features and status of these two kinds of dewatering technologies.Analyse the selection principle and basis for drying process,drying medium,factory location and energy consumption during the construction of low rank coal drying system.The results show that,the selection of drying system should consider the users requirement,the moisture of upgraded coal,security,energy consumption and the cost.The location of factory is crucial,the selection of drying medium should think ahead the cost and safety.The lower energy consumption guarantee the longer running of drying process and its economic benefits.

    2013 01 v.19 [Abstract][OnlineView][Download 1171K]

  • Experimental research of mercury removal efficiency by activated coke

    ZHAO Yu-bing1,2,GUO Miao1,2,BAI Zhong-hua1,2,MA Chen-teng1,2,SHI Ya-wei1,2(1.State Grid Electric Power Research Institute,Nanjing 210003,China; 2.Beijing Guodian Futong Science and Technology Development Co.,Ltd.,Beijing 100070,China)

    Analyse the effect of different adsorbents on gaseous mercury adsorption,compare the adsorption capacity of different activated cokes on gaseous mercury.For the same activated coke,investigate the adsorption methods on mercury removal efficiency over time,influence of particle size and contact area on efficiency.The results show that,at the beginning of adsorption reaction,the adsorption rate is maximum,then decreases until saturate the activated coke.The saturation adsorption capacity of these two kinds of activated coke is 1.137 μg/g and 0.792 μg/g respectively.With the increase of activated coke quality,the adsorption efficiency and needed time for saturation increase.Changing methods,the maximum adsorption rate is raised from 20 percent to 40 percent,that means,the higher adsorbent and mercury ratio,the greater adsorption efficiency.Increase the contact area of adsorbent with mercury-containing gas can improve mercury removal efficiency.

    2013 01 v.19 [Abstract][OnlineView][Download 774K]

  • Lignite drying with steam tube rotary dryer and its heat transfer characteristics

    YU Xue-hai1,LIAO Hai-yan1,ZHAI Jian-ping2,ZHAN Zhong-fu3,ZHAO Xu3(1.Shenhua Guohua(Beijing) Electric Power Research Institute Co.,Ltd.,Beijing 100025,China; 2.Beijing Guohua Electric Power Co.,Ltd.,Beijing 100025,China; 3.Tianhua Research Institute of Chemical Machinery and Automation,Lanzhou 730060,China)

    The steam tube rotary was used to test heat transmission characteristics of lignite under different drying conditions.The results show that,remaining the rotational speed constant,when the coal feed increase from 79.04 kg/h to 132.5 kg/h,the heat transfer coefficient first increase from 35.94 W/(m2·K) to 36.83 W/(m2·K),then reduce to 33.34 W/(m2·K).Adopting the same coal samples,the heat transfer coefficient first increase,then decrease when the rotational speed raise from 0.5 r/min to 3.7 r/min,that means there is an optimal rotational speed.The tests provide data foundation for the calculation of heat transmission coefficient.Its influencing factors are also investigated using dimensional analysis methods and heat transfer correlation mathematical models.The key parameters of heat transmission model a,b,c is 0.036,0.14 and 19.77.The model provides reference for relevant engineering design.

    2013 01 v.19 [Abstract][OnlineView][Download 622K]

  • Prospect of lignite dry distillation in China

    XUE Xuan-ping,SHI Jian-peng,HU Chang-lan,TIAN Peng-jun,XIE Jian-feng,CHEN Xiao-fei,ZHAO Jie(Shaanxi Metallurgical Design & Research Institute Co.,Ltd.,Xi'an 710032,China)

    Lignite is becoming one of primary energy sources in the future,which is abundant in China.It is not easy to utilize lignite directly due to its high-moisture,low heat value,easy weathering and self-ignition characteristics.But it's an ideal material for dry distillation because of its high volatile and activity,great H/C atomic ratio.The lignite dry distillation is very significant because it guarantees sustainable development of coal chemical industry,environmental protection and energy security.Analyse the prospect of lignite dry distillation.

    2013 01 v.19 [Abstract][OnlineView][Download 534K]

  • Research status of lignite forming technologies

    WANG Yan1,2,3,PEI Xian-feng1,2,3,ZHANG Yang1,2,3,WANG Shi-yu1,2,3,BAI Xiao-yan1,2,3,WANG Zhi-zheng1,2,3(1.Beijing Research Institute of Coal Chemistry,China Coal Research Institute,Beijing 100013,China; 2.National Energy Technology & Equipment Laboratory of Coal Utilization and Emission Control (China Coal Research Institute),Beijing 100013,China; 3.State Key Laboratory of High Efficient Mining and Clean Utilization of Coal Resources (China Coal Research Institute),Beijing 100013,China)

    There are abundant lignite resources in China,while its utilization is limited by the coal quality,that means it needs to be upgraded.The lignite upgrading technologies at home and abroad include pyrolysis upgrading process,dehydration upgrading process,forming upgrading process and so on.Based on the requirements of users,the lignite forming technologies change some nature of raw coal through special processes,the production is admirable.Once spontaneous combustion and high water content restricted the long-distance transport and storage of lignite,now this technology solves these problems.So this technology has obvious economic and environmental benefits.Summarize lignite forming technologies of many upgrading processes at home and abroad,introduce and compare the main features of representative technologies.Forecast the development trend of lignite forming technologies in China.

    2013 01 v.19 [Abstract][OnlineView][Download 1109K]

  • Preparation of blended raw high-sulphur coal in Dongpang coal mine

    WU Chen-xiao(Preparation and Coal Quality Test Department,Jizhong Energy Resources Co.,Ltd.,Xingtai 054021,China)

    There are abundant No.9 coal resources in Dongpang coal mine,most are high-sulphur gas-fat coal and fat coal,the caking property is excellent,so just reduce sulphur content,the blended raw coal can be used to coking.Investigate the coking properties of No.2 and No.9 coal resources according to coal blending test,coal quality analysis and 40 kg sample coke oven test.The maximum reflectance of vitrinite test show that,the blended coal retain some part of raw coal characteristics,its industrial natures and caking property can be solved for weighting function.The blended coal for cleaning can comprehensively utilize high and low sulphur coal resources.The newly-built Xipangjing coal preparation plant adopts the research achievement for practical production guidance,the middle and high sulphur gas-fat coal products meet the market demand,that means the benefits increase.The high sulphur clean coal yield is 1.11×106 tons,increase 1.5×108 yuan in 2011.

    2013 01 v.19 [Abstract][OnlineView][Download 864K]

  • Application and development of coal gasification technologies

    GAO Ju-zhong(China Shenhua Coal to Liquid and Chemical Co.,Ltd.,Beijing 100011,China)

    Emphasize some typical coal gasification technologies at home and abroad.Compare the structure,characteristics of Lurgi gasifier,BGL gasifier,GE gasification furnace,multi-nozzle gasifier,Tsinghua gasifier,Shell gasifier,GSP gasifier,two-stage gasifier and dry coal pressurized gasifier.Give some innovative suggestions for the choice of coal gasification technologies.In the future,the core of the clean and efficient coal conversion is large-scale and advanced technologies,which must integrate the electrical,chemical and thermal technologies.

    2013 01 v.19 [Abstract][OnlineView][Download 1123K]

  • Industrial application and development direction of GSP gasification technology

    YANG Ying,WEI Lu,LUO Chun-tao(Branch of Coal Chemical Industry,Shenhua Ningxia Coal Industry Group Co.,Ltd.,Yinchuan 750411,China)

    Introduce the technological process and characteristics of GSP gasification technology.There are a series of problems in its industrial application,such as unstable pulverized coal transportation,easy burn-through nozzle and water wall,special parts abrasion and the like.Analyse these problems and provide solutions.Based on the research status of GSP gasification technology,forecast its development direction.

    2013 01 v.19 [Abstract][OnlineView][Download 916K]

  • Coking experiment program design of blended Xieyi deep coal

    MA Xiao-cheng1,SHAO Qun2,ZHOU Jia1,GE Wu-jie1,LI Sen3(1.School of Chemical Engineering,Anhui University of Science and Technology,Huainan 232001,China; 2.Anhui University of Architecture,Hefei 230022,China; 3.Hebei Chemical and Pharmaceutical College,Shijiazhuang 050026,China)

    Fat coal and primary coking coal are high quality coking coal in Huainan Xieyi coal mine.To better utilize these coal resources,taking four kinds of coking coal as sample,design the coal blending scheme with orthogonal design method,choose the orthogonal table L93(4) for coking experiment,then make the rank difference analysis on test result,arrange the order of influence factor of individual coals.The results show that,while the mass ratio of QM,1/3JM,FM,JM is 15 :35 :10 :40,the comprehensive quality of coke is the best.

    2013 01 v.19 [Abstract][OnlineView][Download 631K]

  • Application of Fe_3Al filter element in fly ash filter of coal gasification device

    WANG Hao1,YANG Jun-jun2,LIU Guan-yin1,WANG Fan1,WANG Jun2,PIAO Jun-ming2,LI Hai-bin2(1.Advanced Technology and Materials Co.,Ltd.,China Iron and Steel Research Institute Group Co.,Ltd.,Beijing 100081,China; 2.Ordos Branch,China Shenhua Coal to Liquid and Chemical Co.,Ltd.,Ordos 017209,China)

    The ceramic filter element in fly ash filter frequently broke in the process of dry-type dust collection.To resolve this problem,taking the fly ash fliter installed in Shenhua coal to liquid facility as research object,developed a new type filter element which is made of Fe3Al.The characteristics of this advanced material was tested by analysing properties of synthesis gas and fly ash,collection efficiency,differential pressure flow curve,filter cake porosity.The results show that,the filter element can stabilize the differential pressure at 20 kPa while the processing capacity is 3×105 m3/h.The Fe3Al filter element has good resistance from H2S corrosion.Even if its surface is slightly corroded,the thickness of corrosion products(FeS) is 0.5 μm,so it can stably run in the gasification devices.

    2013 01 v.19 [Abstract][OnlineView][Download 1200K]

  • Experimental study on combustion characteristics of biomass char

    PAN Wei-lin,PIAO Gui-lin,XIE Hao,ZHANG Ju-bing(School of Energy and Mechanical Engineering,Nanjing Normal University,Nanjing 210042,China)

    To improve the utilization ratio of biomass straw,taking wheat straw and corn straw as research objects,wheat straw and maize straw char were prepared under 400 ℃ and 450 ℃ respectively,TG-DTA thermal analysis technology was applied to investigate the influence of heating rate and combustion atmosphere on combustion characteristics of the char,then obtained the reaction kinetics equation.The frequency factor and activation energy under different conditions were calculated.The results show that,activation energy is hardly affected by heating rate or combustion atmosphere.On the contrary,heating rate and combustion atmosphere have a profound impact on frequency factor.The higher oxygen concentration,the greater the frequency factor,the faster heating rate,the greater frequency factor.

    2013 01 v.19 [Abstract][OnlineView][Download 995K]

  • Combustion performance and reaction activity of coal char

    DONG Ai-xia1,ZHANG Shou-yu1,WANG Jian1,GUO Xi1,CHEN Chuan1, XIONG Shao-wu1,LV jun-fu2,DING Yan-jun2,DONG Jian-xun3(1.Thermal Engineering Research Institute,School of Energy and Power Engineering, University of Shanghai for Science and Technology,Shanghai 200093,China; 2.Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Thermal Engineering,Tsinghua University,Beijing 100084,China; 3.CPI Mengdong Energy Group Co.,Ltd.,Tongliao 028000,China)

    China is abundant in lignite,while its application is greatly limited by its characteristics.With the help of thermal gravimetric analyzer,study the reaction activity of chars.Analyse the combustion characteristics of blended fuel combining char whose pyrolysis final temperature is 1273 K and raw coal with different proportion.Analyse the combustion kinetics with Coats-Redfern method.The combustion reactivity of char can be charactered by the apparent activation energy.The results show that,the char reaction activity decreass with the increase of final temperature of pyrolysis,the added lignite help increase the combustion characteristics of char,while compared with the raw coal,the combustion stability of blended fuel change little.Continue to increase the ratio of lignite,the activation energy of blended fuel gradually increase,it become harder to light.The added lignite influence the combustion characteristics and reactivity of blended fuel.Under the same preparation condition,the combustion kinetic index of bituminous coal char and lignite char vary widely.That indicate that,the combustion reaction activity is related to the coal type.

    2013 01 v.19 [Abstract][OnlineView][Download 1070K]

  • Establishment of dynamics model for coal pyrolysis

    QIN Li-na1,LI Jian-wei2,ZHOU An-ning2(1.Selection Burning Plant,Jiuquan Iron and Steel(Group) Co.,Ltd.,Jiayuguan 735100,China; 2.College of Chemistry and Chemical Engineering,Xi'an University of Science and Technology,Xi'an 710054,China)

    Based on the analysis of coal pyrolysis reaction dynamics and distribution activation energy model(DAEM),the lumped reaction kinetics model was established to represent the pyrolysis process.The kinetics equations which can estimate the relation among the composition,distribution of pyrolytic products and final pyrolysis temperature and heating rate were determined.The results show that,the emission rate of volatile matter approach the ultimate production rate with the rising of final pyrolysis temperature,while semi-coke yield reduce,of which C content increase and the others including H,N,O and S content decrease.Therefore,the rising of final temperature favore the desulfurization and denitrification of semi-coke.The most volatile except H2 basically release and elements change range of semi-coke decrease at 600 ℃.When pyrolysis temperature remain constant,slow heating is beneficial to the full emission of volatile matter.Consequently,the model can precisely describe the whole coal pyrolysis process.

    2013 01 v.19 [Abstract][OnlineView][Download 754K]

  • Influence of multi-point injection on coverage fraction of coal gas during its reburning process

    WANG Wei-ping,ZHANG Zhong-xiao,TENG Ye,CHEN Yong-quan(School of Energy and Power Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)

    Taking one 130 t/h boiler as prototypes,established cold state experimental bench.To better reburn the coal gas,test the influence of multi-point injection on coverage fraction of upflow in gasifier.Numerically simulate this process with standard turbulence model.The results show that,while the injection points are eight,the coverage fraction is the highest.Under four conditions,when the flow inclination of four corners all is 41.17°and reburning flows from the centrals of four walls is 84.57°,the overfire air can be greatly covered.

    2013 01 v.19 [Abstract][OnlineView][Download 1234K]

  • Mine water quality characteristics and water environment evaluation of Inner Mongolia Dongsheng coal field

    LIU Yi-fang1,WU Qiang1,ZHAO Xin-nan2(1.College of Geoscience and Surveying Engineering,China University of Mining and Technology(Beijing),Beijing 100083,China; 2.Mine Oil Research Institute,China Coal Research Institute,Beijing 100013,China)

    Taking Inner Mongolia Dongsheng coal field as research object,guided by geochemistry,coal chemistry,mine geology,hydrogeology and so on,collect water samples pertinently,then test its pH value,total hardness,SO42-,Cl-and HCO3-concentration.Analyse the assay results of water quality on the basis of field geological investigations.Combining the evaluation methods for mine water with water quality mathematical models,made statistics and calculations with grey clustering method,through the evaluation index of three factors including total hardness,Cl-and SO42-.The results show that,the mine water quality of Dongsheng coal field is middle-better type,good underground water cover 39 percent and Ⅲ-type underground water cover 44 percent,it is Ⅲ-type underground water environment.

    2013 01 v.19 [Abstract][OnlineView][Download 916K]

  • Environmental economic cost-benefit analysis of one large mine construction project in Yonglong mining area

    GUO Xin(Xi'an Research Institute of China Coal Technology and Engineering Group Co.,Ltd.,Xi'an 710054,China)

    Environmental economic cost-benefit analysis is an indispensable part of environmental impact statement about coal mining and preparation.Adopting cost benefit method,from the aspect of whole society,its goal is to estimate the environmental loss and net contribution during mining process.Taking a large mine construction project as example,use the cost-benefit method to analyse its economic benefits,social benefits and environmental benefits.Predict the influence of the mine development on environment and economy,then investigate the feasibility of this development.The results show that,the environmental economic cost-benefit analysis provide convenience for the examination and approval.

    2013 01 v.19 [Abstract][OnlineView][Download 1071K]

  • Application of coal production and mine gas extraction technologies in gassy coal seam group mining

    WANG Chang-ming1,2(1.National Key Laboratory of Gas Disaster Detecting Preventing and Emergency Controlling,Chongqing 400037,China; 2.Chongqing Research Institute of China Coal Technology and Engineering Group Co.,Ltd.,Chongqing 400037,China)

    Taking Xieyi mine as research object,investigate the feasibility of protective coal seam mining.To avoid the potential gas outburst hazardous zone,divide the protective coal seams and extract mine gas using various methods.The results show that,the above-mentioned measures protect the protective coal seams and extract mine gas effectively.

    2013 01 v.19 [Abstract][OnlineView][Download 1075K]

  • Development direction of China coal science and technology during the “Twelfth Five-Year Plan”

    YANG Li1,2(1.China Coal Research Institue,Beijing 100013,China; 2.State Key Laboratory of High Efficient Mining and Clean Utilization of Coal Resources,Beijing 100013,China)

    Introduce the strategic position of coal in energy structure,analyse the restrictive factors of China coal industry development,meanwhile,introduce the problems and challenges of China coal science and technology development.Based on The National Science and Technology "Twelve Five-Year" Plan,investigate the development emphases in coal mining,coal bed gas extraction,coal processing and conversion,digital coal mine construction.The goal of the plan is to improve recovery of coal resources,utilization rate of coal bed gas,automatic control level of facilities and production,promote low-carbon utilization of coal resources.

    2013 01 v.19 [Abstract][OnlineView][Download 650K]

  • Application of total quality management in coal preparation plant

    ZHANG Qing1,ZHENG Gao-chao2,WANG Ju-long3(1.Chahasu Coal Preparation Plant,Guodian Jianshe Inner Mongolia Energy Co.,Ltd.,Beijing 100010,China; 2.Schenck Process(Tianjin) Industrial Technology Co.,Ltd.,Beijing 100010,China)

    Product quality determines the development of enterprises.Based on the definition of total quality management(TQM),analyse the application of all staff application,overall process and comprehensive TQM in coal preparation plant.At last,suggest that all staff should pay more attention to quality management.Only this would build the coal preparation plant into advanced,effective,reliable,energy-saving modern plant.

    2013 01 v.19 [Abstract][OnlineView][Download 686K]

  • Causes analysis of low flow chilled water in Texaco gasifier

    CHANG Liang,SONG Shu-qun,KONG Xiang-bo(Yankuang Guohong Chemical Co.,Ltd.,Zoucheng 273500,China)

    Introduce chilled water system of Texaco gasifier and pipes scaling causes.Analyse problems appeared in examination and repairing of gasifier ash water quality,find that slag at the bottom of carbon scrubber and ash water filter,serious scalling filter screen lead to low flow chilled water in Texaco gasifier.To resolve these problems,provide effective solution and preventive measures.After transformation,the chilled water flow increase,that meet the demands of high load operation of gasifier.

    2013 01 v.19 [Abstract][OnlineView][Download 708K]

  • Application of cylindrical sampling apparatus in coal quality detection

    WU Jie,ZOU Jin,ZHU Tong(Guizhou Agency of Quality Supervision and Inspection of Coal Product,Liupanshui 553001,China)

    The industry development has huge demand for steam coal.When power coal supply is tight,there are lots of dispute over coal quality between supply and demand parties.The current mechanization sampling apparatus is designed according to certified reference coal,which is not suitable for Guizhou coal,so different qualities coal are mixed together during loading,so the true coal quality is difficult to inspect.To resolve these problems,adopting cylindrical sampling apparatus,the collection of coal samples is full-depth,fullface and omnibearing.The quantity of coal samples is large,and all coal samples are crushed and screened.With the help of cylindrical sampling apparatus,the inspection results of coal samples is more accurate.

    2013 01 v.19 [Abstract][OnlineView][Download 725K]
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