共查询到20条相似文献,搜索用时 231 毫秒
1.
一般认为,煤中的活性组分与惰性组分的比例和煤级及影响煤的粘结性和结焦性的主要因素。但在配煤炼焦生产与实验研究中,经常发现尽管煤的活惰比和煤级相近,而粘结性和结焦性相差很大。文中通过对不同产地的炼焦配煤进行煤岩学及结焦性实验研究,提出了显微煤岩组分分散富集指数的概念,通过分析显微夺组分的分散富集程度对粘结性和结焦性的影响,揭示出显微煤岩组分的分散富集程度是造成粘结性和结焦性异常现象的重要因素。 相似文献
2.
煤岩学在炼焦配煤中的应用研究 总被引:1,自引:0,他引:1
通过10kg小焦炉结焦性实验,对煤岩参数与煤的结焦性关系进行了研究,提出了炼焦配煤的煤岩参数及ΣI-Rr,m-Rr直方图配煤法。结果表明,当单种煤的惰性组分含量ΣI=20%~35%、镜质组平均随机反射率Rr,m=1.15%~1.35%时,煤具有良好的结焦性。北京焦化厂用ΣI-Rr,m-Rr直方图配煤法指导炼焦配煤,提高了焦炭质量,获得了较好的经济效益。 相似文献
3.
华北是我国重要炼焦用煤基地之一,开展华北晚古生代煤的结焦性能研究具有重要实际意义。在对 26 个矿点的煤样进行煤岩学与煤化学分析的基础上,采用 10 kg 小焦炉试验研究了单种煤的结焦性能,并利用一元非线形回归分析探讨了主要煤质参数与焦炭强度之间的关系,认为煤的镜质组平均反射率、活/惰比、粘结指数以及胶质层最大厚度是影响焦炭强度的主要因素。 相似文献
4.
5.
通过研究陕西韩城矿区含煤岩系中煤的宏观煤岩类型、微观煤岩组分、煤的镜质体反射率以及孔隙特征,分析了该区煤的煤岩特征与煤层气的生储因素,以及煤层气可能富集的煤区。 相似文献
6.
7.
恩洪矿区是云南省重要产煤基地,晚古生界的上二叠统宣威组是主要含煤岩系,其煤层镜质组含量较高,变质程度中等,蕴藏着丰富的煤层气资源.综合研究表明:该区煤层气富集的控制因素主要为煤层厚度、煤岩组分、煤级、吸附性能和良好的保存条件. 相似文献
8.
使用显微镜加热台对我国西南地区晚二叠世和晚三叠世不同变质系列的煤中镜质体进行加热实验表明,不同时代不同变质程度的镜质体在加热过程中具有不同的软化、熔融、固化温度。此实验结果为煤岩学配煤炼焦方法的研究提供了可靠的理论依据。 相似文献
9.
恩洪矿区是云南省重要产煤基地,晚古生界的上二叠统宣威组是主要含煤岩系,其煤层镜质组含量较高,变质程度中等,蕴藏着丰富的煤层气资源。综合研究表明:该区煤层气富集的控制因素主要为煤层厚度、煤岩组分、煤级、吸附性能和良好的保存条件。 相似文献
10.
11.
山西炼焦煤资源不仅分布广泛,煤类齐全,而且资源丰富,粘结性强、结焦性好。大量分析数据显示山西霍西煤田霍州矿区粘结性较好,特别是南部的霍州—乔家湾区,煤的粘结指数为80~100,胶质层厚度为24~33mm;沁水煤田东部潞安矿区煤的粘结性较差,为全省最低,一般在13~68,胶质层厚度在0~7.5mm。单独炼焦性能最好的是西山古交矿区、霍西汾西矿区和柳林三交矿区的主焦煤,其次是霍西的肥煤和乡宁的焦煤,比较差的是大同的气煤,潞安和西山的瘦煤。 相似文献
12.
木里煤田是青海省重要的煤产地,煤类以炼焦用煤为主。聚乎更矿区四井田位于木里煤田的最西端,经详查、勘探提交煤炭资源量2.5亿t,煤类为气煤、1/3焦煤、焦煤、1/2中粘煤、弱粘、瘦煤、贫瘦煤、贫煤、不粘煤。通过对下2煤层物理性质、化学性质、煤岩特征及煤类的统计分析,认为区内同一煤层的变质程度随含煤地层和上覆岩系的总厚度增大而增高,在垂向上随煤层层位的降低而增高;四井田总体构造形态为倾向南西的单斜构造,其煤类分布总体表现北东到南西沿煤层倾向变质程度逐渐增高,沿煤层走向呈带状分布,但在井田边界断层附近煤的变质程度要比其它地段相同深度煤层的变质程度稍高;四井田煤的变质作用类型主要为深成变质作用,部分地段受动力变质作用影响。 相似文献
13.
辽宁省是一个产煤大省,而且煤类齐全。从褐煤、长焰煤、不粘煤、弱粘煤、气煤、肥煤、焦煤、瘦煤、贫瘦煤、无烟煤皆有存在。本省煤质分布可划分为三个带即:长焰煤、气煤带;褐煤、长焰煤、气煤带;肥煤—无烟煤带。其中:长焰煤、气煤带主要分布在辽宁西部阜新、北票、朝阳等地区;褐煤、长焰煤、气煤带主要分稚在辽宁中部昌图、新民、辽中、台安地区;肥煤—无烟煤带主要分布在辽宁东部的辽阳、本溪、恒仁地区。对辽宁省煤的煤质分布规律作出正确的评价对今后的生产起到指导作用。 相似文献
14.
红墩子矿区位于银川市黄河以东,矿区面积较大,煤炭资源量可观。从煤的物理性质、煤岩特征、煤的化学性质和工艺性能等方面分析,认为矿区的煤具有高挥发分、中—高灰、低—高硫、低磷、中热值、中—强粘结,高热稳定性、高软化温度灰、较难磨、较难选的特点,煤类为气煤,原煤或浮选后的精煤可作为炼焦用煤、动力用煤、气化用煤等。 相似文献
15.
蒙古国煤炭资源丰富,但地质基础工作薄弱。位于蒙古国西部的胡硕图井田含煤地层为二叠系胡硕图组,为陆相三角洲体系沉积,含M1、M2巨厚煤层。根据煤质资料分析,区内煤类复杂,M1煤层以低灰、低挥发分、特低硫、高-特高热值、强黏结-特强黏结的焦煤(JM)为主;M2煤层以低灰、低挥发分、低硫、高-特高热值、中黏结-中强粘结的瘦煤(SM)为主;煤的变质作用类型以深成变质作用为主,同时存在动力变质作用。 相似文献
16.
17.
Marian Wagner 《International Journal of Coal Geology》1996,29(4):259-272
In the Carpathian Flysch, coal is present either as exotics of Carboniferous coal deposits or as autochthonous, thin layers of lustrous coal. This paper present the results of the studies of coal-bearing rocks that are coeval with the enclosing flysch sediments. These coals form lenses up to 0.15 m thick. Their morphology precludes an exotic origin. The main petrographic component is collinite with admixtures of poorly fluorescing telinite. Minor components are: exudatinite, sporinite, fusinite, micrinite and sclerotinite. Mineral matter consists of framboidal pyrite clay minerals and quartz.The random reflectance of telocollinite varies from 0.38% to 0.72%, which corresponds to subbituminous and bituminous ranks. Correlation between chemical analysis, coking properties and relfectance measurements, leads to the conclusion that boundary between subbituminous and bituminous coals should be defined by the following values: C=80wt%, VOLATILES=43wt%; calorific VALUE=32.3 MJ/kg; and Ro=0.56–0.57%.Atypical properties, such as: upper C value (75–80wt%); high volatile matter contents (over 43wt%) and low random reflectance (o about 0.38–0.57%) in subbituminous coals; low C value (about 80–82wt%); low reflectance (0.56–0.72%); and good coking properties, of the bituminous coals are attributed to quick coalification during increasing temperature as a result of tectonic stress. 相似文献
18.
19.
20.
Miroslav Košina 《International Journal of Coal Geology》1984,4(3):263-280
Proposals for new scientific classifications of bituminous coals are based on micropetrographic parameters, i.e. vitrinite reflectance as a criterion of the coalification and maceral composition, presupposed to express the connection between the genetic peculiarities and physical, chemical, and technological properties of the coal mass. In the case of coals with high inertinite contents, however, the utilizability of these parameters meets with difficulties resulting from the subjectivity of determining the different transitional material and from insufficient knowledge of inertinite behaviour at higher temperatures. In the case of the maceral-variable bituminous coals produced in the Ostrava-Karviná Coal Basin, these insufficiencies are not important since it is especially the expression of the variability of the properties of isometamorphic vitrinites, which has decisive effects up-on the course of the thermo-chemical transformations, that is of principal importance to the scientific classification of these coals.In the first approximation, the properties of isometamorphic vitrinites may be expressed by the parameter (H/O)at, closely connected with fluidity. While the micropetrographic parameters reflect in particular the peculiarities in the chemical structure of the aromatic parts of coal macromolecules, the parameter (H/O)at expresses the properties of the non-aromatic structures of vitrinite, significantly affecting the course of its thermal degradation. The experimental results show that the value of the parameter (H/O)at, fluidity and the course of degassing the coal of a lower coalification are independent of the maceral composition and vitrinite reflectance; also that the caking and coking properties of low-rank coals are especially dependent on the parameter (H/O)at and partially on the micropetrographic parameters. All these facts should be taken into consideration in preparing new scientific classifications of bituminous coals. 相似文献