关于矿物加工的论文题目怎么写的
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!
找到一篇类似的。朋友你可以参考下! 改革开放以来柴达木资源开发的历程, 大体经历了三个阶段。 第一阶段( 1978年~1999年)。这一阶段资源开发模式处于低层次和粗放型阶段,资源综合开发水平低,采选矿回收率和伴生矿、共生矿、尾矿的利用率不高,各种资源联合开发的层次低,产业关联度不高,产业链短,精深加工能力不足,开发中的副产品、废弃物未得到有效利用。如青海钾肥厂、格尔木炼油厂和地方企业处于游离状态,没有真正起到带动盆地经济发展的作用,盆地自我发展能力弱。 投入漏出型产业结构是这一阶段资源开发的主要特征,导致盆地经济发展有着强烈的外部推动性。受制于旧的地域分工格局和价格体系的双重影响,盆地产业结构升级转换和高级化进程极为缓慢,采掘工业比重远远大于加工工业比重,轻重工业及其内部结构不尽合理。这样的产业结构格局是一种典型的投入漏出型产业结构。表现为:一是资源漏出型,盆地所采掘的大部分资源产品销往区外,而所需日用工业品和生产设备的90%以上由区外调入,这种贸易格局使盆地始终处于双重失利的境地。二是价值漏出型,盆地销往区外的产品多为平价调出,而区外进入盆地的日用工业品又多数为议价购进,这种一高一低的价格体制使盆地工业创造的价值不断流向区外。投入漏出型产业结构的形成归咎于盆地资源开发利用程度低, 资源深加工增值能力不足,产品技术含量低等,而所有这些原因又都是资金投入严重不足所致。由于投入严重不足,交通等基础设施建设资金长期不到位,企业用于技术改造的资金滞后,地方财政自我积累能力差,这种情况最终导致各行业投资额的80%以上来自省和中央,从而形成了盆地经济发展对域外资金和对域外劳动力资源的强烈依赖性。域外资金来源一是靠国家财政拨款和倾斜投资,二是靠域外企业资金流入,前者因国家有限财力投资缓慢西移短期内无从指望,后者资金流入的目的在于寻求更高的利润报酬,可柴达木盆地的资金利润率远低于沿海平均水平,因而缺乏对域外资金的吸引力和良好的附着地,域外资金流入的门槛高,这使得许多投资者望而却步,最后不得不改变投资去向和投资区位。 第二阶段( 2000年~2004年)。西部大开发战略实施以来,随着国家优惠政策的倾斜,地方投资环境的显著改善,以及资源紧缺而引发的新一轮全球性资源开发热潮兴起,作为全省资源开发的重点地区,海西州经济社会呈现出勃勃向上的发展态势。这主要表现在以下三个方面:一是开发地域由点向面全面扩展。多年来,海西一直是全省资源开发的热点地区, 但开发地域主要集中在察尔汗、锡铁山等点上,而在这一阶段已拓展到东西台吉乃尔、木里、鱼卡、新源、察汗乌苏等地区,甚至连一直缺乏产业支撑和财政来源的德令哈市也有了青海碱业这样的大型项目。二是开发领域由盐湖资源、油气资源向其它资源扩展。长期以来,除了油气资源外,海西州的资源开发主要集中在盐湖资源的开发上,而盐湖资源的开发也主要集中在钾资源的开发上。这一阶段,柴达木盐湖资源的开发已实现了由单纯的钾资源向综合开发利用钾、锂、锶、硼、镁等资源转型,向盐湖和油气资源联合开发、综合利用转型。同时,煤炭资源、铁矿资源等成了新的开发热点。这为海西州经济的持续增长提供了新兴产业支撑和新的经济增长点。三是投资主体开始由省内中小型投资者为主向省外战略投资者为主的转变。前些年,由于各方面条件的限制,海西资源对省外大的战略投资者一直缺乏足够的吸引力。资源开发主要由省内的中小型投资者来进行,但随着西部大开发战略的实施,一些省外战略投资者纷纷进入海西,如中信国安、浙江玻璃、河南义马、内蒙古庆华等一批战略投资者和大型企业集团。这些投资者的进入,使柴达木地区资源开发的领域、规模、档次和技术含量都迈上了一个新的台阶。 2004年,是国家实施西部大开发战略的第五年。海西州紧紧围绕国家和省委、省政府西部大开发的工作部署,利用西部大开发良好机遇,扩大投资规模,加快资源开发力度,增加财政收入,使海西州主要经济指标在全省名列前茅。2004年地区生产总值突破100亿大关,达33亿元,总量居全省第二,2004年比1999年年均增长6%,居全省第一;工业增加值2004年完成32亿元,居全省第二,年均增长8%,居全省第一;地方财政收入2004年完成51亿元,居全省第二,年均增长3%,居全省第一;全社会固定资产投资五年累计完成11亿元,居全省第二,年均增长8%,居全省第七。 第三阶段( 2005年~2008年)。2005年10月,柴达木被列入我国首批循环经济试验区之一。州委、州政府依据柴达木循环经济试验区的实际状况,按照资源综合利用、有效配置、循环发展的要求,树立了产品之间、产业之间、地区之间大循环大发展的理念,进一步深化了对州情和柴达木循环经济试验区的认识。从企业、政府、社会三个层面有效地推进了循环经济试验区建设。青海油田公司、青海盐湖集团、中信国安科技公司、庆华集团等大中型企业也积极开展了循环经济产业发展的研究。循环经济工业项目建设取得重大进展。盐湖集团百万吨钾肥综合利用一期、庆华集团乌兰焦化项目一期、青海锂业3000吨碳酸锂、鱼卡煤矿90万吨矿井、大柴旦矿业公司滩间山黄金等一批项目建成投产。青海碱业纯碱二期、庆华集团肯德可克铁矿开发、木里煤业聚乎更煤炭开发、西台钾锂硼资源开发、青海油田油气资源勘探、青海盐湖科技公司万吨级碳酸锂、冷湖滨地钾肥公司大盐滩钾资源开发、义海公司大煤沟煤炭开发等项目进展顺利。盐湖集团百万吨钾肥综合利用二期工程、盐湖集团元通钾肥综合利用项目、庆华集团120万吨球团项目、庆华煤业洗精煤一期300万吨工程开工建设。10万吨联二脲、盐化综合利用、10万吨铅冶炼等项目前期工作积极推进。一是积极搭建科研平台。在省政府、中科院和有关方面的支持和共同努力下,试验区组建了以中科院盐湖研究所、青海经济研究院等科研单位为主体的柴达木循环经济研究院,开展了10个循环经济共性、关键技术开发和产业化示范重大专项课题的研究。二是科技创新取得重大进展。以提高整体装备水平、提升科技含量为重点,支持鼓励企业自主创新,积极引导企业开展循环经济技术应用研究和推广工作。选定了盐湖集团、中信国安、青海锂业、西部矿业、庆华集团等一批循环经济示范企业。加快对先进适用技术的推广应用。盐湖集团、盐湖镁业公司等镁资源开发重点工业化中试装置建成试车,青海锂业公司盐湖提锂技术获得成功,乌兰100万吨焦化项目在高海拔地区成功建成投产。三是围绕柴达木盐湖化工、石油天然气化工、煤化工、冶金四大特色优势产业发展,积极开展人才培养。依托州职业技术学校,设置相关专业,开展适应于循环经济发展所需的人才培养。同时青海碱业、庆华集团、盐湖集团等企业积极开展定向定点人才培训,人才培养取得了突出成绩。 二、发展循环经济是柴达木资源开发的必然选择 (一)发展循环经济是缓解资源约束矛盾的根本出路。柴达木盆地虽然矿产资源相对丰富,但多具有不可再生性,且96%的资源是盐类矿产,储量大的如氯化钠在全国的需求量有限,市场相对较好的又限制于提取技术,从而使大多数的优势矿产难以充分利用。而在国民经济中具有重要意义的黑色金属矿产和部分有色金属矿产探明储量不足。 水资源方面,柴达木盆地实有水资源96亿立方米,仅为全省平均水资源占有量(62万立方米/平方公里)的 23%。全州水利工程可供水能力为2亿立方米,总需水量为59亿立方米,年总缺水39亿立方米,。随着一大批工业项目的陆续上马,工业用水将会进一步增加,预计到2010年用水缺口将增至3亿立方米。 (二)发展循环经济是从根本上减轻环境污染的有效途径。柴达木盆地深居青藏高原腹地,自然环境恶劣,生态环境脆弱。盆地内的河流都为内陆河,自净能力很弱。一旦污染将直接对人民群众的健康和农牧业生产造成威胁。因此,保护好盆地的生态环境,使生活在这里的人民群众能有一个不被污染的人居环境,能喝上干净的水,呼吸清洁的空气,吃上绿色的食物,拥有健康的身体就显的具有非同寻常的意义。 全州有土地面积31万亩, 其中未利用土地31103万亩,占79%。未利用土地面积大,荒漠化程度高,生态环境脆弱。特别是柴达木盆地,风蚀地、风砂地、盐碱地、砾石、戈壁分布广泛。重点是盆地西北部的茫崖至冷湖;盆地南部的乌图美仁至察汗乌苏、夏日哈;盆地北部的希里沟至怀头他拉。矿产资源多集中于盆地的西北部,是盆地的主要工业基地。该区域的生态一旦遭到破坏,很难恢复。 盆地内的工业多为资源开发型,采掘工业比重大。据资料,全州每年有200多万吨尾矿,其中180万吨随意堆放,占地面积达30万平方米。30%的采矿点分布在荒漠治理重点区。工业经济的增长主要是通过扩大初级产品产量来提高。粗放式开发造成地表植被破坏,土壤和空气受到污染。特别是柴达木盆地还未建立水资源污染防治体系,水资源污染问题从长远看已不容忽视。 (三)发展循环经济是转变经济增长方式、提高经济效益的重要手段。循环经济强调资源的再使用和再循环,延长产品的使用期,提高重复使用率,充分发挥自然资源的内在价值,提高水、矿物等各类紧缺资源的利用效率。“垃圾是放错了地方的资源”。因此必须大力发展循环经济,搞好资源节约和综合利用,加强生态建设和环境保护, 走出一条科技含量高、经济效益好、资源消耗低、环境污染少、人力资源优势得到充分发挥的新型工业化道路,以最少的资源消耗、最小的环境代价实现经济社会的可持续增长,走出一条节约型的发展道路。 三、柴达木矿产资源开发战略探讨 (一)绿色战略。绿色战略是一种可持续发展的战略,是资源开发企业适应经济社会可持续发展的要求,把节约自然资源、保护和改善生态环境、有益于消费者和公众身心健康。作为生产经营理念,采用绿色技术,生产绿色产品,协调环境保护和经济利益的关系,即将绿色理念充分体现在企业的发展战略中,包括绿色设计、绿色生产、绿色包装、绿色营销等方面,以实现企业的持续发展。对于柴达木这一具有重要环保意义的地区,企业实施绿色战略有利于树立企业良好形象;有利于企业提高经济效益,振兴地区经济;有利于加强国际交流与合作,扩大出口贸易额;有利于打破绿色壁垒,提高企业国际竞争力。 (二)可持续发展战略。柴达木盆地矿产资源必须综合开发利用。如盐湖资源要重点进行钾、硼、锂、镁、锶、溴等盐湖资源的分离提取工艺、技术的系统工程学研究;开展盐湖高值、系列化工产品的开发研究。察尔汉盐湖提钾过程中副产大量氯化钠(NACI含量70%~80%),提钾后的老卤中含有大量镁、锂、溴、硼、碘,其含量分别达MGCI,33%、LIC10,2~3%、B203,03%左右,经济效益与社会效益远远高于钾盐。青海钾肥二期工程年产100万吨氯化钾, 将副产氯化钠200多万吨,排放老卤5000万吨(其中含MGCI2 1600万吨UCl约8万吨),如果综合利用其中的50%,初步计算其产值将比主产品100万吨氯化钾产值高数倍。很显然,从富含多种矿物的卤水中,单一提取一种产品是不合适的,况且卤水中有益组份分别提取后,在其原料成本、产品本身质量的提高等方面都存在着有益的互补关系,实践表明,钾、镁、硼、锂分别提取的生产工艺过程是互相制约、互相促进的。为了使盐湖资源开发取得最大经济效益和保护资源与环境结合起来,必须走综合利用、深度加工的路子,提高产品的附加值与市场竞争能力。 (三)国际化战略。以盐湖资源开发为例,国内生产、国外进口、国外生产国内销售是我国钾肥供应的三大支柱,在扩大国内产能的同时,充分利用周边国家的钾盐,通过不同方式合作开发,有利于保证我国对钾盐的需求,泰国的呵劝高原,老挝的万象平原,俄罗斯的上卡姆盆地, 土库曼和乌兹别克的中亚盆地等蕴藏着丰富的钾盐资源,储量大、品位高,以可开采钾石盐为主。以我国东、南部为主要市场,经济效益要好,同时可形成部分稳定供应的进口钾肥。在条件成熟时,盐湖集团可以参与对外钾资源合作项目的建设,利用自身优势,通过“走出去”吸收国外先进经验,进一步满足国内需求,拓宽企业生存空间,走国际化道路,向跨国公司方向发展。 (四)人才战略。二十一世纪最稀缺的资源是人才,在当今日益激烈的市场竞争中,企业间的竞争实际上是人才的竞争。可以这样说,没有高质量人才的企业是没有竞争力的企业,没有高素质人才的企业是没有前途的企业。“行千里者、三月聚粮”,由于矿产资源开发是一个系统工程,涉及的学科多,要实行特殊优惠的人才政策,要从长远考虑做好人才培养储备,耍积极探索“只求所用,不求所在”的用人机制。要在积极引进高级人才的同时,把着眼点放在对现有科技人员作用的发挥上,一方面实行特殊的优惠政策,切实改善科技人员的工作和生活条件,筑巢引凤;另一方面也要采取措施,不断提高其思想素质、科技水平,以发挥其应有的作用。 (五)联盟战略。盆地内的大型资源开发企业可以与国内大型公司或跨国公司组建战略联盟,在全球供应链的分工环节中找到最佳位置和出路。参与国际化竞争。同时,也可以以地域为中心,集结同行业企业,组建战略联盟,选择实力较强、规模较大的企业作骨干,以它为先锋开拓市场来带动企业联盟实施国际化战略。战略联盟中的大企业可以与中小企业优势互补,从而形成综合优势,而且产品由于专业化、规模化的生产,成本大大降低;同时,也免去了中小企业进行研究开发而带来的资源浪费,有利于资源的有效配置。
关于矿物加工工程的论文题目怎么写的
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!
专业还可以把,就是和选煤有关的。
还行吧,和煤矿有关专业好就业!!!
关于矿物加工工程的论文题目怎么写
具体以咨询当地人社局规定为准,一般要求:考职称计算机、外语,发表论文1篇或者有价值的专业文章1-2篇,继续教育满足要求,助理工程师任职4年以上或者本科毕业5年以上。
本科的就好混了,找个矿山做对象,找个师兄论文的做参照,差不多就会放你过的;研究生的论文就要花心思跟导师多沟通,找个比较好的方向,现在的论文要检测别被枪毙了;博士的话我就没发言权了。
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关于矿物加工的论文题目怎么写高中
相似宝玉石的常规仪器鉴定摘要:笔者对相似宝玉石进行了论述,重点叙述了28种相似宝玉石品种的鉴别与相似宝玉石品种的区别特征。关键字:相似宝玉石鉴定特征区别 1、钻石与合成碳硅石的鉴别二者在光泽、火彩、密度上基本相同,折射率都大于78,用热导仪检测均有钻石反应。所不同的是:合成碳硅石为一轴晶正光性,放大观察时小面棱重影、白线状细长的管状包体,在电导仪下具导电反应;而钻石放大观察无小面棱重影,且具有天然矿物包体,电导仪检测无反应。2、红宝石与红色石榴子石的鉴别二者均为红色、光泽、密度又相似;红宝石为非均质体宝石,具多色性。石榴子石为均质体宝石,无多色性;前者有荧光。后者无;前者的光谱在蓝区为吸收线。后者的光谱在蓝区为吸收带;3、紫水晶、方柱石、堇青石的鉴别三者均为紫色调,折射率、密度基本相似。紫水晶与方柱石的区别在于:前者无解理,贝壳状断囗,有色带,一轴晶正光性。而后者具有解理,参差状断囗,一轴晶负光性;紫水晶与堇青石的区别:堇青石有解理,二轴晶,三色性明显。而紫水晶为弱二色性;堇青石与方柱石的区别:前者明显的三色性,二轴晶。后者弱的二色性,一轴晶;4、碧玺、磷灰石、赛黄晶的鉴别三者虽然颜色各异,但其折射率、密度基本相似。其主要区别在于:碧玺为一轴晶负光性,双折射率大,具明显的二色性,放大观察可见明显的小面棱重影;磷灰石也为一轴晶负光性,但双折射率小,多色性不明显,具解理,在580nm有双吸收线;赛黄晶虽然具解理,但为二轴晶,可见干涉图和弱的荧光;5、石英与长石的鉴别这里的石英是指具有乳光效应、半透明的种类。长石是指具有月光效应的白色品种;二者的区别在于:石英为一轴晶正光性,无解理、贝壳状断囗,折射率为544—553;长石为二轴晶,有解理、具晕彩效应;6、尖晶石与符山石的鉴别尖晶石与符山石的区别:前者均质性,有时具光性异常,无多色性,放大观察见细小八面体负晶;后者为一轴晶,有多色性,但是双折射率小,放大观察见气液包体、矿物包体;7、透辉石与矽线石的鉴别透辉石的鉴定特征为具有两组解理,断囗为参差状,外光源放大观察(凸面型的底面),除了具明显的阶梯状断面外,还有与之垂直的裂缝,此裂缝即为另一组解理,多具星光效应;与之区别的矽线石特征为:具有一组解理,外光源放大观察(凸面型的底面),具有向珍珠的沙丘纹状的阶梯,实为解理,没有与之垂直的裂缝,此为一组解理的特征,多具有星光效应;8、绿色柱晶石与绿色透辉石的鉴别二者均为二轴晶,也都具猫眼效应。区别在于:柱晶石具明显的多色性,双折射率小。而透辉石具有弱的多色性,双折射率较大,铬透辉石在红区有铬的吸收线;9、无色钠长石玉、无色石英岩玉、无色蛇纹石玉、无色玛瑙的鉴别无色钠长石玉主要由钠长石组成,其折射率均低于54,放大观察(凸面型的边部),多数具柱粒状变晶结构;而石英岩玉的折射率为54以上,放大观察(凸面型的边部)为鳞片粒状或粒状变晶结构。也就是二者的折射率、结构不一样;无色蛇纹石玉为纤维状变晶结构,区别于石英岩玉、钠长石玉;而玛瑙为隐晶质结构,具同心层状、条带状组构。区别于其它玉石;10、葡萄石与软玉的鉴别葡萄石除可见到特征的放射状结构外,亦可见438nm的弱吸收带。此带位于紫区的边缘,在观察时,必须先观察分光镜紫区的宽窄,然后放上宝石观察才能观察到;软玉为纤维状变晶结构,分光镜检测,各别在蓝区有模糊的吸收线,紫区无;11、翡翠与水钙铝榴石的鉴别此二种玉石只是密度相似,折射率相差较大,二者的结构也有差别,之所以在这里提出,是因为在平时的教学中,学生常把水钙铝榴石鉴定为染色的翡翠。究其原因是学生只观测了滤色镜和密度,而没有测折射率。故二者的区别是:结构、折射率;12、菱锰矿与蔷薇辉石的鉴别二者均为锰至色,又都为粉红色。区别在于:前者的折射率在60-78之间变化,是一个动值。而后者的折射率在73左右,是一个固定的值(54除外,因测到共生物石英);前者的组构为鲕状、肾状、条带状、层纹状、粒状等。而后者为柱粒状变晶结构;前者盐酸测试有反应,后者无反应;以上是笔者在多年的教学实践中总结出来的一些经验,由于样品所限,难免有挂一漏万之嫌。故只能是抛砖引玉,以此启发、告诫同行和后人,少走或不走弯路。因为在宝玉石的鉴定过程中,要有科学的态度,严紧求实的作风。切不可对所从事的工作不负责任,我们鉴定工作者的失误,会给消费者和商家带来不必要的麻烦、社会的不和协、经济上的纠纷等,为此宝玉石鉴定是一项科学性和技术性很强的工作,必须严格地按照工作程序有步骤和有条理的进行,而不应敷衍塞责、信口开河、应付了事。宝玉石鉴定的结果应该是准确无误,即使经权威的宝玉石鉴定专家运用现代的仪器设备进行核查也仍然如此。以树立良好的信誉。珠宝鉴定工作者必须具有强烈的事业心、有为国家和社会、为人民负责任的精神,愿意为宝玉石事业发展而努力工作,做诚实守信的模范。参考文献李劲松赵松龄等。宝玉石大典北京:北京出版社2001李兆聪宝石鉴定法北京地质出版社1994
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
试析《董卿主持风格》中央电视台的节目主持人,多年以来一直被各地的媒体公认为效仿的楷模,或者是追求的方向。可是就像萝卜青菜一样,央视的主持人风格不同,各有特点。而我则偏爱青菜的清新,喜欢即时尚又不乏营养的综艺节目主持人,这几年央视的领军人物当然就非董卿莫数了。 在观众的印象中董卿是一位专业的晚会节目主持人,大方得体,气质稳重,穿着成熟又不失风尚,在央视各套电视台的综艺节目中频频出现,成为中国观众最熟悉的主持人之一。我认为,央视的主持人从杨澜开始是我比较有印象的了,然后是倪萍,再后是周涛,一直到现在的董卿。除了董卿具有年龄优势以外,能在如此激烈的竞争与淘汰中站住脚,一定要有自己的特色。回头看,第一届比较著名的正大综艺主持人杨澜,当时的主持特点是比较阳光和知性。她一再证明着她被观众所喜爱。之后的倪萍,鲜明对比,主要是成熟稳重和亲切感强,易于带动现场气氛。经常用真情感染观众,把观众搞得眼泪汪汪,瞬时让观众耳目一新,也证明她获得了大多数观众的喜爱,可是这一特点,也有少数观众渐渐产生反感,随着时间的增长,观众们觉得这种过于煽情的主持风格已经看够看累了,需要新鲜血液。周涛正是当时观众眼中的新鲜血液,她外表时尚,和轻松干练的主持风格,正和大众的胃口,主持节目的时候,废话很少,语言干练,精巧。着实吸引了观众的眼球。而董卿,在我看来,她聪明的具备了以上三位的所有特点于自身,知性,时尚,又善于对着镜头抒发自身情感的她,在各种场合应变及时,大方得体,并且懂得看场合随时变换风格。比如《青歌大赛》时,她会让自己尽量轻松一些,和紧张的参赛选手形成对比,同时又可以缓和选手的情绪,却把握分寸不会因为自己的轻松,影响到赛场的严肃气氛,这里可以看见杨澜的知性。而《欢乐中国行》,正是一个半分百的娱乐节目,董卿拿出了自己一切的开朗活泼,尽量做到时尚又亲切,在台上表现活跃,却不像其他地方台的节目主持人在台上乱来,这里有一点周涛的时尚又精巧。我曾经还多次看过董卿主持的慈善类节目,比如说最近的《为了母亲的微笑》是一场为了灾区贫困儿童捐款的晚会。我想她有些效仿了倪萍的本事,在描述灾区儿童生活状态时动了真情,而感动了在场和电视机前的所有观众。而超越倪萍的是,恰到好处的只让眼泪在眼圈里打转。(这点是真本事!)另外,董卿的穿着时尚得体,身材苗条,所以在视觉上经常给人耳目一新的感觉,基本功扎实,虽然是上海人,但吐字归音非常清楚,是我最需要学习的,基本功是最最重要的,让观众听清楚,听明白是基本。因此在各种场合,她都可以展现她优秀的功底。这是我对董卿的基础了解,我印象中她没有出过书,所以了解不足,请师傅指正!
这几年翡翠 和田涨的厉害 可以分写下写论文很有用的 实用 和实际接轨 石家庄晶玉来珠宝行 可以为您提供这方面论文
矿物加工论文题目怎么写的
选题依据=选题意义+选题背景。论文选题的依据通常情况是由以下几个因素确定:1、你自己的兴趣爱好,知识背景;2、(您所熟知领域)当前领域的研究热点问题;3、当前国内外的研究现状和已取得的成果;3、本领域还有没有解决的问题,或者是否存在其他领域先进的方法可引入等;4、请教身边的同学朋友。通过以上几点我们就能掌握选题依据的内容:现状:目前国内外研究现状已有的进展、还存在哪些问题(已解决的、半解决的、未解决的);问题:你要为你所在领域解决什么样的问题;方案:你所有的研究方向、思路,是找到了新方法,还是对旧的方法进行改进,又或者是从其他领域引入本领域未用过的方法,将有什么创新的地方;意义:写这个题目的意义(理论意义及实践意义),你所要突破的难题,对本领域研究发现有什么积极作用?
这是你学专业知识的最好机会,现在老师一般只要你做设计中的一个部分,最好自己把每个部分都弄懂
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!
选题依据包括:选题的学科性质、理论意义及实践意义;国内研究现状的分析。研究方案包括:研究内容、研究中所要突破的难题、拟采取的研究方法,有何特色与创新之处以及与选题有关的参考文献等内容。详细的你自己添加吧!~