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关于选矿的论文题目

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关于选矿的论文题目

因为字数超过一万字了 所以中文里稍微删减了一点 反正你是写英文的对吧 只看下面英文就行了  关于磁电选矿相关应用的论文  根据矿石中不同矿物的物理、化学性质,把矿石破碎磨细以后,采用重选法、浮选法、磁选法、电选法等,将有用矿物与脉石矿物分开,并使各种共生的有用矿物尽可能相互分离,除去或降低有害杂质,以获得冶炼或其他工业所需原料的过程。关于磁选设备的进展,已有若  别,在物料中加  选矿使有用组分富集,减少冶炼或其他加工过程中的燃料、运输等的消耗,使低品位的贫矿石能得到经济利用。选矿试验所得数据,是矿床评价及建厂设计的主要依据。  从脉石中有时从其他矿物中分选出金属矿物或有价值的别种矿物的机械加工方法  With regard to the application of magnetic beneficiation related papers  According to the different mineral ores physical, chemical nature of the ore broken ground, the use of re-election law, flotation, magnetic separation method, electricity election law, will be useful minerals and gangue mineral separately, and a variety of symbiotic useful minerals as far as possible, separate, remove or reduce harmful impurities in order to obtain smelting or other industrial raw materials needed to With regard to the progress of magnetic separation equipment, are already a number of specialized assessment  Reference 〔 'a 41, here only collected on a magnetic separation and information  Comprehensive   1 weak magnetic characteristics of the progress of low intensity magnetic separation is to use  High-performance chin iron boron magnets to create a higher field-strength magnetic drum  Election machine, drum magnetic separator and pre-selection of large chunk magnetite  Stone, the development is conducive to improve the concentrate grade of weak magnetic   Chin iron boron magnets (Nd: Fel knife) is the largest energy product can be  Tatsu 18X10 "(T A / m), about drilling alloy shirt  (SmC) Maximum energy product (59X10 "T A / m) of  z-fold [51, silver ferrite (S6Fe20,) the largest energy product  (326X105T A / m) 10 Therefore, the use of  Chin-Fe-B Magnetic Separator line easy to raise the field strength and   Germany, for example, with hinge rod iron boron permanent magnet developed 'Permos'  Drum magnetic separator magnetic induction of up to 4 ~ 5T,  Materials can be used wet-dry election or an election can also be more ideal  Strong magnetic separator used to remove material to a strong magnetic material  Quality 〔6 ' British Boxmag - Rapid Rail Limited with hinge  Boron magnets developed 'Magnadrum' Drum Separator  Magnetic field up to 3 ~ 4T, for sorting industrial minerals  And abrasive powder 〔 'J As equipment such as large-scale examples, I  State Institute of Ma On Shan mine CTDG1210 following the development of large  Diameter magnetic separator, he developed a greater CTDGIS16 type  Diameter of the magnetic separator [3], the use of money-Fe-B magnetic system, cylinder surface-ping  Both the magnetic field up to 4T, for sorting large magnetite  S Anshan Black Design and Research Institute of Mining and Metallurgy Shandong Zhang  家洼cooperation in the development of iron ore a price 1400mmx1600  mm electromagnetic water-cooled magnetic pulley 【〕, the average magnetic field for the cylinder surface  24T, handling capacity up to 200t / h, used for pre-selection  One of the magnetite 350mm stone, eight months from the original 667,000 t  Excluding iron ore 97% of the 75,000 t tailings, a total increase  Economic benefits of 534,200 In order to improve the sorting equipment  The effect of the comprehensive utilization of mineral emei Institute conventional magnetic separation  Trough improve magnetic 〔a re-election machine,〕 its groove from the upper body cone  Cylindrical-shaped change, permanent magnetic ferrite by the lower part of Round Tower  Shape changed to the upper part of the overall magnetic lines scattered formation of multi-storey circular magnetic system,  Field strength distribution of 12 ~ 0kA / m, and equipped with the concentration of self -  Control system can be sub-constituency pulp concentration of control in 30% ~  Between 35 percent, the device in the application of Shougang Qian'an Iron effect  Fruit is: with the improvement of processes, improved sorting tablets  Degrees, with the previous fine sieve fine grinding process compared to that in mill  Capacity, concentrate grade and iron recovery under the same conditions,  Increased the production capacity of 66% This equipment has been developed  For the price 300,600,1500,1800,2500 mm Series  P In order to improve the concentrate grade, Beijing Mining and Metallurgical Research total  Hospital developed a Bk a drum magnetic field more than 1021  〔Kawasaki It adopted a very open 7 magnetic lines and downstream type election  Box, fill in the election together with me in Central and exclusive premium coarse tailings,  Feeder terminal located in the overflow weir and exclusive fine-grained tailings, so that shipped with the tube  Line of magnetic material has always been the reverse flow of clean  Achieve the purpose of concentrate The aircraft in Nanfen Iron Mine  Concentrator industrial test results show that with the price 105Ommx  21OOmm half compared to current-type magnetic separator, a high concentrate grade  04 percent, sorting efficiency 28%, while the magnetic iron back  Low yield of only 19   It is worth noting that the former Soviet Union to study electrochemical  Law regulating the process of strengthening the magnetic 'K Research in the laboratory do  Set of refractory ores and oxide ores, the first paragraph of the low intensity magnetic separation  Before using the electrode of the role of the most promising, concentrate grade will be provided as  1% ~ 1,4%, iron recovery rate of 5 percent raise, 4  %, Weak magnetic separation tailings in strong magnetic regulated before, iron  And improve the recovery rate of l%, 4% Easy selection of ore,  Polarization effect, the first and the second paragraph of the magnetic iron recovery  Rates were increased by only 2%, 8% and 1% ~ 2  C It is believed that the effect is due to the different nature of the ore, magnetic  Of different intensity and mineral Also as a result of ore oxygen  Substances fixed potential value and exchange current value and restore the cathode  Response to the current limit of different   2 Strong magnetic strong magnetic equipment were limited mainly to  Permanent magnet and electromagnetic roller or belt strong magnetic Britain  Rapid L BOxmag with a hinge iron boron permanent magnet system  Creating a 'Magnaroll' Roll Magnetic Separator [ '〕, including the roll diameter  Gong Gong 75mm and 100mm in two specifications, respectively, for the Office  The rationale for fine-grained and coarse-grained It is expected to pass an area of the magnetic field  Often for the 9 ~ 0T, and loop generated by the high gradient,  Sorting performance roller magnetic induction machine is superior, the typical application  Including the purification of silica sand and feldspar, improve the quality and Tao Andalusite  Fine porcelain material dry The former Soviet Union developed a rotating magnetic  Field Separator roller 〔 ',,, also known as electric sorting The  Main loser is expected by the belt and with the following configuration and with parallel  Constitute a permanent magnet Magnetic roller by the permanent magnet composed of three parts, in  Permanent magnet poles of the Ministry of Law and roll to the vertical axis, before and after the permanent magnet  Body of law to the magnetic axis and roll into a 45 "angle, forming the same level  Face in three directions of the magnetic field, magnetic field for the roll surface 45T Points  Electoral principle is the use of non-magnetic conductive particles in rotating magnetic roller  Rotating magnetic field generated by the driving force for transforming the role of pay and non-derivative  Xinhua particle separation of aircraft being used for non-ferrous metal processing residue from  Recovery of scrap and waste aluminum, copper and other metal particles, conductor production  Purity and recovery of goods are up more than 94 China's Ma  Hill Mining Research Institute, following the development of Cs-1-type roller magnetic separator  After the development of a Cs-2 electromagnetic induction strong magnetic roller  Machine 〔''], the roll diameter and effective length of 380mm were smart  And 1468mm, parallel twin-roll configuration, with a total of four sub-election,  Magnetic field can be between 4 ~ 78T regulation, excitation, Chuan  Actin and were air-cooled power 23kw, 13xZkw and  09 justice Z The aircraft used in Meishan Iron sorting 12 ~  Chek Ling ZMM one of the indicators of iron ore is iron ore  40%, the concentrate grade and recoveries were  05% and 75%, a single-year cost-effective equipment  For 630,000 With different roller magnetic Ferromagnetism with teeth  Board or the ball wet media as a result of strong magnetic separator structure is complicated,  High cost, coupled with the type of large development remains is to promote  Applications and improve and SHP a strong magnetic separator 2000  In Qidashan Iron Ore has been applied 〔'' ', SQC-6 -  2770-type strong magnetic separator in Masteel satisfied people Gushan Iron Mine production flow  Cheng, Gong-1500 Shuangli Central strong magnetic separator further in Kunming Steel  By the popularization and application of 〔'5] SHP-keung, a 3200-type magnetic separator  The improvements include 〔'']: magnetic angle from 83 "to , Magnetizing  Coil replaced by the air-cooled, such as oil- Rather meaningful is that Queensland  Steel plate medium level of tooth ring magnetic separator and the ball vertical ring magnetic media  Machine with the same test sample were compared [1 '〕, the results of table  That the tooth plate flat ring of iron concentrate grade and recoveries were  About 4% and 8%, but the vertical ring-type magnetic properties as a result of the reverse flushing  Material, which is not easy to plug for the screening, the following rough, rinse water  Pressure and lack of strict water quality requirements, more reliable   3 HGMS in the magnetic field of high gradient magnetic  Study of the election is still occupies an important position, and made significant Jin  E Svoboda described a new type of high gradient magnetic separator  I''〕 plane, the aircraft using short-term water-cooled magnetic coil system, the magnetic field for  ZT, input power 110kw, from South Africa University of the  Witwatersrand gold and uranium tailings recovery, capacity 30t / Former  The Soviet Union the new joint company克里沃罗格selection and black metal  Beneficiation Research Institute developed a 600-type 3KM small magnetic  Sorting machine 〔 'Lu' Kai loaded aircraft using electromagnetic magnetic lines and mesh  135 ~ x51 ~ punching screen for sorting media magnetic induction for the 5T, processing capacity of up to 30Ot / h, for  Enterovirus 95 to deal with a fineness of 045 N edge of the iron oxide stone  R Copper-rich Zambia's high gradient magnetic separator to  To the attention recently with the background magnetic field 3T, sorting cans foot  Inch 23mmx32mmx104mm (effective volume 42ml,  Filling 5% 50 ~ 10, that is, steel wool m high horizontal magnetic field gradient  Magnetic devices, to 5 ~ 38 al m ore of copper concentrate and made  Experimental research on t ',', in the feed flow rate of 7cm / s and cleaning velocity  14cm / s under the conditions of separation twice before a magnetic products  Chalcopyrite and bornite content from 72 to 86 percent called back  The yield was 82%; after a magnetic products, copper content  From 16%    Increased to 44 percent, and the recovery was 72 In China,  HGMS who has been cross-industrial applications period, workers from China and South Africa  Industry, universities and Ganzhou, Jiangxi Institute of cooperation in the development of nonferrous metallurgy  The SLON a 1000 vertical ring pulsating high gradient magnetic separator has been  The development of a r500 type SLON 〔 ' ', Its diameter by sorting  1ooomm to 150omm, mail handling capacity t / h to  30t / h, and structural improvements, performance has increased, the first  Taiwan SLON a 1500-type magnetic separator installed in 1989 regardless  Mountain iron ore, to deal with slime and strong magnetic separation tailings, such as fine-grained Refractory  Mixed materials, the original estimated annual economic benefit is 06 million yuan'''',  Inter reached 08 million Passed technical appraisal in 1990 after  The mine has ordered a 1500-type SLON a pulsating high ladder  Separator The past two years, also iron ore and copper Gongchangling  Copper applications were recorded in the five and a one SLON  1500 vertical ring pulsating high gradient magnetic On the pulse of high-Ossetia  Magnetic principle degrees were also made to further explore 〔 "] Zhongnan Engineering  Industry University of Pangushan Tungsten fine mud of pulsating high gradient magnetic separator test  A post-mortem studies also received a good indicator of 'Chuan: containing the WO74%  Tungsten fine mud at the right time under the conditions of separation, to be with WO3  Volume of 90 percent and 78 percent recovery rate of Scheelite; and non -  Pulsating high gradient magnetic separator compared to the high concentrate grade 99%,  The recovery rate was only 09 percent By the Central South University and aldehyde hills  Municipal Science and Technology Development Center, developed in cooperation CL Kazunori 500mm  Vibration cycle high gradient magnetic separator''〔 "to fill China's high  Ridge soil HGMS It's tank tracks and well-differentiated  Do not for 500mm and 300mm, the magnetic field up to ZT, power consumption  About 220kw, handling about Zt / Industrial tests showed that  It's exciting and good cooling performance, can effectively remove high  Ridge soil micro-paramagnetic iron particles, a significant increase in high -  Ridge soil and into a white porcelain, can produce better economic and social  E  On the high gradient magnetic separation theory, since 1973  Watson made a number of magnetic particle collector concept 〔25 'have been  Established a fairly complete theory of magnetic Recently,  Svoboda, who according to the energy point of view to explore the high gradient  New theory of magnetic collector 〔26] In his view, the paramagnetic particles in  High gradient magnetic field and magnetic wire trap with a collision with  Some of the overall role in a London for the role of van der Waals energy, double -  Layer energy, with an average energy and shear stress on the particles Zuogong  And of and derived by medium particle collector wire radius  (Limited to particle size) and particle magnetization coefficient, strong magnetic field  Degrees, medium wire magnetization and radius, fluid velocity and density  Degrees and the viscous coefficient of the   4 superconducting magnetic superconducting magnetic separation has been into the large-scale chemical  Industry application Eriez Magnetic company, following the United States in 1986  Will be re-25 leaves, a diameter of 2134mm Tank superconducting magnetic separator  J M Huber Corporation for kaolin processing plant purification of high -  Ling soil after less than a year, the same company also ordered a  Re-250t, the diameter of 3048 blade n Magic a similar superconducting high gradient  Separator 〔Sichuan, when the aircraft is being created, he ordered  Third such equipment, according to plan was the first quarter of 1990  Degrees installation This is the world's largest superconducting magnetic separation  Machines, superconducting magnet with a Nb叭Wirewound system, liquid helium cooling  To a 269 ℃, only the beginning of each cycle supply excitation  Current, in 60 seconds, zero magnetic field can be increased to ZT, Ran  After having been able to maintain foreign to ZT magnetic field, weeks at the end of clearance  Closed, the magnets' return 'of power is about to start when the' through to '  Half The cost of superconducting magnetic than ordinary high gradient magnetic  Slightly more elections, the second piece of equipment production costs than the first  Taiwan slightly Germany KHD Humboldt has韦达格  Will be a superconducting Descos sold Drum Separator Turkey  Its 〔:'3, used to a weak magnetic serpentine gangue and magnesium  Mineral separation, ore particle size of 100 ~ 4 magic n , Containing about 5102  20%, FeZ034 intestines, including stem-election once was 510:5  % And Fe: O, 3% of magnesite concentrate Aircraft  Specifications for the price 120OmmxI500mm, the magnetic field up to 2  T, the handling capacity of 10 belly / h, power consumption is about skw h / t,  Is one of the world's first for the coarse-grained superconducting magnetic separation  M Now expect the 'high temperature' superconductors to develop third-generation super -  Magnetic sorting machine "'  2 electric election  Kelly and Spottiswood three papers with a comprehensive  Review of the theory of The first review of the basis of principle,  Including electrostatics; particle characteristics, namely, particle conductivity  (Band theory, electron capture and other forms of electrical conductivity),  The surface of semiconductor electronics in nature: particles or metal contacts  The equivalent circuit, fluid particle The second assessment  Describes the measurement of electrical particles and particle charge Xinhua  Electric field measurement, including measurement, Dutch power measurement, contact charge  Cumulative volume measurement and conductivity Dutch electrical particles rationale package  Including corona charging, induction charging, friction charge, charge rate,  Coehn The third review of the practice of electrostatic beneficiation,  Including electrostatic concentrator theoretical analysis (stress analysis), Static  Xinhua concentrator analysis of the experience, equipment parameters, sorting circuit,  Three papers related to the literature Xinhua election on I: Arts and  There are some theoretical research Additives have been used abroad  A large amount of friction method charge at KCI and NaCI  F The Act the use of KCI and NaCI friction charged the difference  Do not, in the amount of materials in adding So that the mobile  Layer belt during transport friction charged, and then sorting machine  KCI in a concentrate, KCI up to 92% concentrate grade, recovery  Rate of 50% AL Shalom and others discussed the non-all  Uniform electric field separation of the exchange of technology for liquid and gas media article  Pieces under the sorting mechanism "in Sichuan, the establishment of electric field strength, the Netherlands  Electricity and Coulomb force and the ratio of inertial force of   Dressing to make a useful component enrichment, reducing smelting or other processing of fuel, transport and so on consumption, so that the poor low-grade ore will be economic Beneficiation test of the data is the deposit rating and the main basis for plant   From the gangue minerals are sometimes separated from other selected metal minerals or other valuable minerals machining

我有的,莱拿。依据学术方向进行选题。论文写作的价值,关键在于能够解决特定行业的特定问题,特别是在学术方面的论文更是如此。因此,论文选择和提炼标题的技巧之一,就是依据学术价值进行选择提炼。技巧二:依据兴趣爱好进行选题。论文选择和提炼标题的技巧之二,就是从作者的爱好和兴趣出发,只有选题符合作者兴趣和爱好,作者平日所积累的资料才能得以发挥效用,语言应用等方面也才能熟能生巧。技巧三:依据掌握的文献资料进行选题。文献资料是支撑、充实论文的基础,同时更能体现论文所研究的方向和观点,因而,作者从现有文献资料出发,进行选题和提炼标题,即成为第三大技巧。技巧四:从小从专进行选题。所谓从小从专,即是指软文撰稿者在进行选则和提炼标题时,要从专业出发,从小处入手进行突破,切记全而不专,大而空洞。

关于煤矿的论文选题

引深“人人都是通风员”理念       实现安全管理科学化   2006年初,集团公司吴董事长面对国内煤矿安全工作的紧迫形势,及时在全公司提出了“人人都是通风员”的安全理念,告诫广大员工,矿井通风管理工作需要各部门全员、全方位、全过程的重视和参与。通过朴素的语言向员工阐述预防“一通三防”事故的深刻内涵,让每一位员工都具有通风员的“三懂、三会、三做到”的基本技能。这一理念的提出,紧紧抓住了煤矿企业安全工作的核心,明确了强化“一通三防”工作的总体思路、具体方法和途径,对指导集团公司的安全生产,避免“一通三防”事故的发生,有着极其重要的意义。   三年多来,集团公司上下深入贯彻这一理念,打破了集团公司十几年的事故发生概率,安全工作实现了健康稳定发展,在同煤集团安全管理工作上创造了一个奇迹,形成了具有同煤特色的安全文化。“人人都是通风员”的安全理念已经显现出了极为卓著的安全管理效果。实践证明:“人人都是通风员‘的安全理念抓住了实现安全生产的关键,继续引深这一理念是落实科学发展观的具体体现,是实现超前预防、加强细节管理的迫切需要,是加强全员、全过程安全管理的有力措施,是煤矿企业实现安全发展、和谐发展的基本要求,也是我们同煤集团安全管理向科学化迈进的必由之路。   所谓的安全管理科学化,就是通过规范化、系统化管理,使安全工作形成规律,达到规律性管理。这就要我们进一步认识和理解这一理念的深刻内涵,让“人人都是通风员”安全理念在企业安全管理上发挥更大作用。要继续将“人人都是通风员”理念引深到安全培训,不断提高员工队伍素质;将理念引深到制度建设,建立安全工作长效机制;将理念引深到现场,从源头控制事故的发生;将理念引深到职能部门,进一步做好指导和服务;将理念引深到班子建设,从决策中堵塞安全隐患漏洞。要把这一理念引深到安全工作的方方面面,实现安全管理科学化。   一、将理念引深到安全培训,不断提高员工安全素质。实现安全管理科学化做好员工培训是基础。安全生产作业过程中,人的不安全行为是诱发事故的主要原因,员工的安全意识和业务素质成为避免事故的重要因素。将“人人都是通风员”理念引深到安全培训,就是要通过多种形式,多种渠道搞好员工日常安全培训工作。采取实地走避灾路线、现场说法等各种便于职工接受的方法,深入推进“人人都是通风员”安全理念和安全应知应会知识的贯彻落实,把学习“一通三防”知识同员工的岗位特点相结合,把学习“一通三防”知识与“三违”人员的教育相结合,把学习“一通三防”知识与案例分析相结合,把学习“一通三防”知识与演示实验和井下学习相结合,确保培训效果,提高员工的实际操作能力和自保能力。随着“人人都是通风”安全理念的不断深化,这一理念的内涵将牢牢地扎根在每一位员工的心上,使员工现场的应急思维实现本质安全化,有效提高煤矿的安全管理层次,为企业稳步、高效、健康、持久地向前发展,提供可靠的安全保证。   二、将理念引深到制度建设,建立安全工作长效机制。实现安全管理科学化,制度是保证。只有制度管理才能规范员工的行为,养成良好的习惯,只有养成好的习惯才能形成企业文化,只有良好的企业文化才能创造出更大的效益。“人人都是通风员”不仅赋予每位员工安全管理的权利,而且也让每名员工承担了安全工作的责任。责任的落实必须有相关的制度来加以保证,用严格的制度规范行为,用良好的行为落实责任。将“人人都是通风员”理念引深到制度建设,就是要以依法制订、落实制度为起点,建立安全工作量化考核、责任评价、奖惩激励三个责任体系,要制定、完善、细化以“一通三防”为重点的各项安全管理制度,进一步强化安全责任,精细安全管理,严格工作考核,进一步加大对制度落实的监督检查力度,保证各项制度执行严格,落实严肃,用制度来保障安全生产。实现靠制度管人,靠机制管事,使安全管理走向法制化、规范化。 链接:

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关于煤矿的论文题目

一、井下局部通风机 目前,我国煤矿用局部通风机生产企业90家,主要分布在重庆、山东、山西、河南、江苏、湖南、江西等19个省(区、市)。技术力量、设备条件、管理水平、执行标准状况和经营思路各不相同,产品质量、技术性能差异较大。产品质量、性能指标和技术水平不容乐观。JBT、YBT系列单级轴流式局部通风机是我国20世纪50、60年代引进前苏联的产品,体积小、价格低,但噪音大,全压效率低,风压偏低。其全压效率约60%~73%左右,噪声103~111dB(A),有的甚至达到l27dB(A)。风机效率低,造成了能源的严重浪费。噪声主要集中在中、高频率范围,刺耳的尖叫声严重影响了工人的正常作业和身心健康,并且掩盖了一定距离内行车声、机械运转声和信号电铃声,易引起伤亡事故。 近两年,个别企业与高校或科研院所合作,对YBT产品进行了技术改造,在小型号上改善了风机叶型和加装了消音器,取得了较好的效果。但大部分产品不符合现代生产环境的要求,属于应该被淘汰的产品。 斜流式(也称:昆流式)局部通风机是20世纪90年代初期发展起来的新型 风机,具有空气轴向流动、高效运行区域宽、噪音小等优点。但风压偏低,在效率指标上形同虚设,生产工艺、技术还不成熟,目前国内生产企业约有4家,规格型号和使用量较少,未形成批量和系列化生产。 对旋式局部通风机是20世纪80年代末、90年代初研制并迅速发展、推广 的一种局部通风机。目前机号有N0至N0等;装机功率有lkW×2至75kW×2等;工作方式有压入式、抽出式和压抽式等;叶片材料有钢叶、铜叶片、铝合金铸造叶片和塑料叶片等。 对旋式局部通风机一般由容量相同的隔爆电动机驱动,两个风叶轮采用不同的叶片数,一级叶轮的叶片安装角大于二级叶轮的叶片安装角。二级叶片还兼备普通轴流式风机中的静叶功能。测试证明:对旋式局部通风机的通风效率比前置静叶型两级普通轴流式通风机高约8%~10%, 比后置静叶型高约4%~5%;具备良好的逆风性能,逆向风量可达60%~70%。 目前,对旋式局部通风机均采用了外包复式消声器结构,有效地降低了噪 声。实验证明:噪声频率越高,吸声系数越高。在125Hz~500Hz时,吸声系数只 有3~5左右,在1000Hz以上吸声系数可达8以上,4000Hz时可达95。 近年来,部分高校和科研院所对矿用通风机技术进行了深入的研究,先进的理论、计算方法和结构优化等得到较好地应用,促进了矿用通风机产品行业技术水平的提高。 小型煤矿用抽出式轴流通风机产品的质量状况。20世纪80年代末、90年代初,新疆煤炭工业学校和山西省运城地区矿山节能防爆风机厂分别推出了外 置电动机型和内置电动机型小主扇,在小型煤矿很快得到推广、应用,并迅速发展成型号、规格齐全的系列产品。 电动机内置型小主扇为目前常用的一种机型,电动机安装在隔流腔内,与流道内的气流完全隔离,并有孔道与大气相通,以保证隔流腔中的电动机在新鲜风流中启动和运行。小主扇动叶轮大部分安装在通风机出气口侧(即叶轮后置式), 结构较为合理,隔流腔处于流道中气流的负压区域,对小主扇安全性有利,也便于调整叶片安装角度。 目前,我国小主扇生产企业约40家。近年来,部分国内高校和科研院所对小主扇进行了较为深入的研究,在通风机涉及和提高产品性能方面取得了较大的进展。新的涉及理论、设计方法及加工方式被部分企业接受和应用,小主扇风量、压力及效率有明显提高。二、井下轻合金材料 由于轻合金材料质量轻、塑性好,经过适当的工艺处理后,能达到很高的强度,而且有机械加工容易,耐腐蚀等优良特性。所以,随着科学技术的进步和煤矿生产机械化程度的提高,轻合金材料在矿井中的应用越来越广泛,如煤矿井下支柱、提升、通风设备及携带式仪表、工具等。但轻合金材料与其他钢质材料冲击摩擦产生火花,很容易点燃可燃性气体,引起爆炸事故。如1986年9月28日,徐州矿务局庞庄煤矿-370m水平的718掘进面,因相装机钢丝摩擦产生火花引起煤尘爆炸事故,死亡26人,重伤2人,殃及巷道1509米。l987年12月,安徽省某矿角联巷道中发生一起特大爆炸事故,死亡45人,重伤4人,轻伤6人,经济损失199万元。其原因是小绞车运行时,手闸和绳轮之间摩擦火花引起沼气爆炸。国外轻合金材料摩擦、冲击产生火花引燃沼气爆炸事故也比较多。如1950年,英国诺克切斯矿用铝合金外壳的煤电钻掉到钢支架上引起沼气爆炸。爆炸危险环境中机械摩擦火花的危险性已引起煤矿安全部门的高度重视。 世界上许多国家,如英国、德国、前苏联、日本、波兰、捷克等,很早就对机械摩擦火花及轻合金在矿井中应用的安全性进行了较系统的研究,并建立了相应的试验装置,制定了检验规则。美国主要研究采煤机截隔火花安全性及预防措 施,Ralla冶金研究中心的DHDesy 等人设计建造了模拟通风机叶片与机壳摩擦火花工况,对金属材料火花点燃沼气的安全性进行研究。在20世纪80年代初对轻合金摩擦火花的研究,重点是对煤矿井下常用的轻合金,并建立了先进的实验室,制定了JISC-0901 标准和JISM-7002通用规则。 20世纪80年代中期,我国也开始对金属材料摩擦火花安全性方面的研究。当时建立的高速冲击、自由落锤冲击和旋转摩擦3个试验装置和相应的检测 、控制系统,是目前国内惟一的金属材料摩擦火花安全性研究和试验检测系统。 国外井下矿用工具 、设备材料基本都作摩擦火花试验,国内一般只注重设 备用材料作火花试验,在工具用材料的火花试验方面没有建立相应的实验及标 准。随着我国煤矿开采深度的加大,开采强度的不断增强,井下工作的危险性越来越大,对井下火源的控制力度也必须增强,对材料摩擦火花的研究和实验也应更加深入。瓦斯及突出灾害的研究一、瓦斯灾害 煤矿瓦斯事故发生的原因是多方面的,影响因素众多。有的原因具有潜在 性、突发性,而事故本身具有破坏性和灾难性。但煤矿瓦斯灾害事故的发生也有其一般的规律,只有掌握了灾害发生、发展的规律性,才能有效地避免事故的发生和发展。煤矿灾害事故发生的原因,除了与矿井本身的自然条件、开采工艺、管理水平、安全意识及员工素质等有很大关系外,技术装备水平仍然是极为关键的因素。煤矿井下工作场所是动态变化的,影响灾害发生的因素也是变化的。现有监测技术仅仅是监测部分安全参数,不能做到实时预测分析和监控,难以预先得知瓦斯灾害事故可能发生的地点及波及区间,也难以预先制定和执行有效预防灾害的措施,使得瓦斯灾害事故难以显著下降,灾害危害程度难以有效控制,灾害事故原因难以调查清楚。 我国所有煤矿均为瓦斯矿井。大中型煤矿中,高瓦斯矿井占34%, 瓦斯突出矿井占77%。小型煤矿中,高瓦斯矿井占15%左右。随着开采深度的不断增加,机械化程度的不断提高,开采强度的不断增强,瓦斯涌出量还会进一步增大,瓦斯灾害的治理越来越成为煤矿灾害防治的重点。 传统的矿井瓦斯管理主要是由管理人员凭主观意识和经验进行工作。这种 管理模式,由于受管理人员的知识 、经验和责任心的限制,很难适应矿井瓦斯灾害事故的复杂多变条件,这也是瓦斯灾害事故多发的原因之一。实现现代化管理,用科学方法管理矿井瓦斯,应建立矿井瓦斯灾害事故数据库、知识库和专家系统,对矿井瓦斯灾害进行科学预测,以便掌握矿井瓦斯动态,正确识别和评价瓦斯事故灾情,及时提出抗灾对策。 我国在瓦斯防治方面提出:加强煤矿瓦斯的基础理论研究,掌握瓦斯灾害 事故发生的机理及其演化过程,在瓦斯防灾、抗灾和救灾的理论和技术难题上取得巨大突破,为煤矿瓦斯治理的全面好转提供理论和技术基础;建立和健全完善的煤矿安全科技创新体系和科技服务体系,研究矿井瓦斯事故发生、救灾的有效技术,并制定科技成果的推广和转化机制;建立和健全完善的煤矿安全监察技术支撑体系,借鉴外国的经验,在各省内部实现监察联网。监察人员每次执法都现场无线上网,并存入省局服务器,便于全省统一调度和指挥监察。二、煤与瓦斯突出灾害 随着我国煤矿开采深度的加大,开采强度的不断增强,煤与瓦斯突出的危险性也在增加,突出危险区域也在扩大,部分原无突出危险的煤矿也开始出现突出现象,部分未划分为突出矿井的煤矿也不得不按突出煤矿管理。我国煤与瓦斯突出危险矿井数目和突出强度、频度 将随着开采深度的延深、开采强度的增大而逐渐增多,危险性随煤层厚度的增大而增大。 研究和统计表明,突出煤层中真正具有突出危险的区域只占煤层总面积的 20%~30%。突出危险预测预报的最大意义在于找出和划分煤层突出危险性区域,节省防突费用,使防治措施更据针对性。我国从20世纪70年代开始研究煤层突出危险性区域预测,国家“七五”期间重点研究了综合指标预测技术。按照我国目前的开采速度和进度,煤与瓦斯突出将是煤炭行业将要面临的一个重大课题。如何有效地预防和控制突出,也将是下一步减少煤矿事故的一项重要内容。国家应该在此领域投入充足的力量去研究相关理论,并开发有效产品,在这种危险来临之前,找出解决问题的有效办法和手段。粉尘灾害的研究 目前,煤矿井下劳动条件差、尘毒 危害严重的局面尚未根本扭转,煤尘爆炸事故不断发生,尘肺病人逐年增加,严重危害工人生命健康,直接影响安全生产。一、煤尘爆炸 我国多数煤矿所产生的粉尘具有爆炸性。据统计,我国国有煤矿中90%的矿井的煤尘具有爆炸的危险。对单一煤尘来说,其爆炸下限浓度为30mg/m3~50mg/m3, 上限浓度为1000mg /m3~2000 mg/m3 时,爆炸力最强的浓度为300g/m3~500g/m3时。煤尘爆炸的引爆温度一般为650℃~990℃。粒度越小,单位煤尘质量的表面积越大,越容易产生爆炸。发生爆炸时,粒度小于1mm的煤尘都能参与爆炸,但爆炸的主体是小于75μm的煤尘。井下空气中如果有沼气和煤尘同时存在,能增加沼气、煤尘爆炸的危险性,并能相互降低各自爆炸的下限浓度。当存在有沼气,且浓度达到 5%时,空气中的煤尘浓度只要达到lg/m3时,就可能发生爆炸。正常空气中的氧含量为9%, 在井下作业环境空气中由于其他气体的混合,氧含量降低,则影响煤尘的着火温度,使着火温度升高,当氧含量低于17%时,煤尘就不会发生爆炸。 煤尘爆炸可放出大量热能,爆炸火焰温度可高达2000℃甚至更高,产生破坏性很强的高温。在发生爆炸的地点,可能连续发生第二次爆炸,造成更大的灾 害。煤尘爆炸时,爆源l0m~30m内的破坏程度较轻,即爆源附近的破坏力较弱,离爆源较远处爆炸压力较高,破坏力强。煤尘爆炸传播时,冲击波传播的速度大于火焰传播速度。这样,巷道中沉积的煤尘先被冲击波扬起,随即被到达的火焰点燃发生爆炸,且不断向远处蔓延。煤尘爆炸气体中含有大量CO和CO2爆炸区空气中CO的含量可高达8%, 这是造成人员死亡的主要原因之瓦斯煤尘爆炸的控制技术分为预防爆炸发生技术和抑制爆炸传播技术两个方面。预防爆炸发生的方法主要是采取措施控制瓦斯积聚、煤尘的产生或飞扬以及火源的产生:抑制瓦斯煤尘爆炸传播的方法主要是采取措施将已发生的瓦斯煤尘爆炸限制在一定区域,尽量控制灾害损失。其措施主要是设置被动式隔爆装置和自动抑爆装置。被动式隔爆装置是借助于爆炸冲击波的作用来喷洒消焰剂,而本身无喷洒动力源:自动抑爆装置是利用传感器探测爆炸信号,触发自带的动力源喷洒消焰剂,形成抑制带。 被动式隔爆装置最早采用撒布岩粉和设置普通岩粉棚,虽然防止爆炸传播 效果较好,但岩粉暴露在潮湿空气中,极易受潮而失去消焰剂功效,且频繁更换 岩粉的工作量较大,因此我国煤矿现在几乎已不采用这两种方法。但国外仍有些国家还普遍使用。在20世纪90年代,煤科总院重庆分院开发的隔爆水槽(脆 性) 和隔爆水袋,以水作为消焰剂,方便了煤矿安装和使用,在全国得到了广泛推广应用,其中隔爆水袋的使用最为普遍。 矿井瓦斯煤尘爆炸灾害绝大多数是由于局部瓦斯燃烧或爆炸引起沉积煤尘 飞扬参与爆炸传播造成的,因此,在爆炸初期的抑制相当重要。二、煤矿尘肺 煤矿尘肺有3种:砂肺,即长期吸入游历SO2含量较高的岩尘,所发生的尘肺,其发病工龄较短,砂肺病变的进展较快,掘进工砂肺的患病率较高;煤肺,即长期在高浓度的煤尘环境里工作,所发生的尘肺,其发病、患病率都很低,发病工龄一般较长,尘肺病变的进展缓慢,发展成为严重三期者为数极少,该病主要发生在采煤工作面的工人中;煤砂肺,即长期接触两种粉尘的工人所患上的坐肺,该病主要发生在既进行掘进、又从事采煤的工人中。 尘肺患病除与粉尘的性质有关外,还与粉尘的浓度直接相关。工作面的粉尘浓度越高,吸入并沉积到肺内的粉尘量也越大,掌握工人工作环境的粉尘浓度及工人接尘时间,可以大致估算接尘工人肺内的粉尘沉积量。5Og煤尘在肺内可能会导致尘肺,12g岩坐在肺内足以形成较严重的砂肺病变。 据卫生部统计,2002年底,中国尘肺病累计病例达到万人,其中仍然存活者 44万多人。2002年,全国共报尘肺病患者12448例,其中煤矿系统的尘肺病例占 6%(仅为原国有重点煤矿病例数,不包括地方煤矿和乡镇煤矿)。每年尘肺病造成的直接经济损失达80亿元人民币。2003年,全国产煤4亿吨,其中地方煤矿和乡镇煤矿占9亿吨,占一半多。专家认为,全国估计有120多万尘肺病患者,这意味着每1000个中国人中就有一个尘肺病患者。 随着国家改革开放的深入,国际上通行的职业健康体系也逐步在我国得到 推广。职业病的危害也日益被广大从业者、社会、政府所重视。在各个工作现场都采用了减少粉尘产生、降尘、排尘、 除尘、个体防尘等措施,相信我国煤矿尘肺病患者会越来越少。

学术堂整理了十五个关于煤炭行业的论文题目,供大家参考:  煤炭行业循环经济发展理论及应用研究  煤炭行业实施"走出去"战略的思考与建议  山西煤炭行业资源整合的实践与对策  我国煤炭行业尘肺病现状分析及防治对策  中国煤炭行业市场结构与经济绩效实证研究  我国煤炭行业粉尘浓度监测技术的现状及发展趋势  我国煤炭行业上市公司社会责任会计信息披露分析  煤炭行业应用型本科教育核心教材:井巷设计与施工技术  煤炭行业如何走循环经济之路  煤炭行业防治水技术取得突破  国内煤炭行业发展趋势分析  煤炭行业职业危害分析与控制技术  谈煤炭行业人才队伍现状及对策  煤炭行业预警指标体系的基本框架结构  山西煤炭行业资源整合兼并探讨

关于采矿的论文题目

前景广阔!矿产资源是不可再生的,具有不可替代性,从最近几年的各种矿石的需求和价格在我们的一生中,这件作品的矿产资源,未来的职业前景,无限!

自己买,到时候都有买的

前景广阔!矿产资源是不可再生的,具有不可替代性,从最近几年的各种矿石的需求和价格在我们的一生中,这件作品的矿产资源,未来的职业前景,无限!

采矿工程分为煤矿类和非煤矿类采矿(英文名:ore mining)是自地壳内或地表开采矿产资源的技术和科学。一般指金属或非金属矿床的开采,广义的采矿还包括煤和石油的开采及选矿。其实质是一种物料的选择性采集和搬运过程。采矿工业是一种重要的原料采掘工业,如金属矿石是冶金工业的主要原料,非金属矿石是化工原料和建筑材料,煤和石油是重要的能源。多数矿石需经选矿富集,方能作为工业原料。♥♥♥♥♥♥♥♥同学,你这个设计有什么要求,我这有几份合适的,怎么给你♥♥♥♥♥♥♥

关于矿业的论文题目

论述了主要含煤盆地和井字型构造格局的形成,在此基础上进行煤炭地质分区与勘查开发地质条件对比;通过煤炭资源与煤类分布图以及资源量统计论述了煤炭资源空间、数量和煤类分布特征;在构建勘查开发程度计算公式基础上对当前煤炭资源的勘查开发程度进行了定量分析,并结合煤炭资源的分布特征圈定了相应的潜力区块;通过煤炭资源产消的历史分析开展了对于未来煤炭资源的供需预测以及综合保障能力分析,最后指出煤炭资源勘查开发的发展趋势并提出初步建议。主要成果和认识如下:(1)含煤盆地经历了漫长的构造演化,形成了大陆区井字型构造格局,奠定了煤炭地质井型分区的基本格架;构造应力场性质分异是导致东西部主要含煤盆地的盆地类型、煤系宏观构造变形、勘查开发地质条件分异的根本控制因素;(2)太行以东断陷型含煤盆地面临巨厚新生界覆盖、断裂发育、高地温、高地压、高水压等问题,地质条件复杂;中西部坳陷型含煤盆地煤系埋藏浅,盆内变形微弱,地质条件简单,但水资源短缺、生态环境脆弱;就瓦斯而言多数矿井勘查开发条件差;(3)煤炭资源西多东少、北富南贫,而水资源东部多、西部少、南部多、北部少,山区多、平原少。煤炭资源与水资源、经济发展水平均呈明显逆向分布;各赋煤区煤炭资源的多寡与构造演化过程中作为长期稳定构造单元的古板块的分布及组成各赋煤区构造单元的多少具有某种对应关系,以华北、塔里木、扬子等大规模稳定古板块内部蕴含的煤炭资源量往往较大。(4)我国煤炭资源煤类齐全,从褐煤、低变质烟煤到无烟煤均有分布,但分布严重不均;(5)勘查开发程度定量分析表明:浅部勘查程度表现为东高西低、北高南低;开发程度表现为东高西低,南北分布特征不明显;蒙东、晋陕蒙宁、云贵川渝、北疆四分区以及神东、蒙东、晋北、晋中、陕北、新疆、云贵七大基地的资源前景无论在当前还是未来较长时期内均属较优之列;(6)未来煤炭资源产消均呈上凸式增长,2020年、2030年、2050年煤炭需求量分别为39亿吨、40亿吨和42亿吨左右,产能有能力与需求保持同步增长;煤炭进口量增加更有可能侧重于弥补某些特殊工业用途或优质煤炭资源的缺口上;总体上煤炭资源勘查开发保障能力较强。(7)未来东部地区勘查工作应侧重深部、大型推覆体之下以及老矿区外围煤炭地质精细勘查,同时注重煤层瓦斯与水文地质勘查工作;中西部在加强对于空白区和预测资源勘查力度的同时,加强对于保有尚未利用资源的勘查力度,提高勘探详查比例,形成资源梯级结构;(8)煤炭资源勘查开发在宏观和微观上均表现为战略西移,提出保护与减轻东部,稳定开发中部,加快开发西部的开发布局战略。 [1] 唐卫国,蒋星祥,汤亚平 湖南煤炭资源开发利用现状与对策[J] 中国矿业 2012(01) [2] 邱增果,孟运平,廖家隆,王可新,丁磊 江苏省煤炭资源保障程度及勘查研究[J] 中国煤炭地质 2011(10) [3] 程爱国,宁树正,袁同兴 中国煤炭资源综合区划研究[J] 中国煤炭地质 2011(08) [4] 张瑞胜 浅谈我国煤炭资源的利用现状[J] 科技风 2011(07) [5] 王双明 鄂尔多斯盆地构造演化和构造控煤作用[J] 地质通报 2011(04) [6] 黄文辉,敖卫华,翁成敏,肖秀玲,刘大锰,唐修义,陈萍,赵志根,万欢,FINKELMAN B 鄂尔多斯盆地侏罗纪煤的煤岩特征及成因分析[J] 现代地质 2010(06) [7] 朱春俊,王延斌 鄂尔多斯盆地东北部上古生界煤系地层成煤特征分析[J] 西安科技大学学报 2010(06) [8] 李鑫,庄新国,周继兵,汪洪,马小平 准东煤田中部矿区西山窑组巨厚煤层煤相分析[J] 地质科技情报 2010(05) [9] 易同生 贵州省煤炭资源勘查与开发的现状、问题与对策[J] 中国煤炭 2010(06) [10] 陈武,李云峰 我国能源可持续发展的探讨[J] 能源技术经济 2010(05)

学术堂整理了十五个关于煤炭行业的论文题目,供大家参考:  煤炭行业循环经济发展理论及应用研究  煤炭行业实施"走出去"战略的思考与建议  山西煤炭行业资源整合的实践与对策  我国煤炭行业尘肺病现状分析及防治对策  中国煤炭行业市场结构与经济绩效实证研究  我国煤炭行业粉尘浓度监测技术的现状及发展趋势  我国煤炭行业上市公司社会责任会计信息披露分析  煤炭行业应用型本科教育核心教材:井巷设计与施工技术  煤炭行业如何走循环经济之路  煤炭行业防治水技术取得突破  国内煤炭行业发展趋势分析  煤炭行业职业危害分析与控制技术  谈煤炭行业人才队伍现状及对策  煤炭行业预警指标体系的基本框架结构  山西煤炭行业资源整合兼并探讨

前景广阔!矿产资源是不可再生的,具有不可替代性,从最近几年的各种矿石的需求和价格在我们的一生中,这件作品的矿产资源,未来的职业前景,无限!

前景广阔!矿产资源是不可再生的,具有不可替代性,从最近几年的各种矿石的需求和价格在我们的一生中,这件作品的矿产资源,未来的职业前景,无限!

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