粘结剂对无烟粉煤型焦质量的影响

以低阶太西无烟煤和是天湖山无烟煤为原料,采用冷压成型工艺,研究了粘结剂种类和添加量对型焦质量的影响,对实验数据进行分析,得到了型焦质量随粘结剂性质的变化规律,并确定了用无烟煤生产优质型焦的最佳粘结剂种类和配比,此餐,从微观结构方面研究了无烟煤与粘结剂在高温下的粘结成焦机理。     

煤阶对无烟煤型焦质量的影响

采用冷压成型法,研究了无烟粉煤炼制优质型焦的技术,重点对五种不同煤阶的无烟煤煤进行了成型炼焦实验,提出了型焦质量随煤阶的变化规律及其机理,对由不同煤阶无烟煤炼制的型焦质量及其经济性进行了分析评价。     

生物质型焦技术

以干法冷压成型工艺用生物质作粘结剂将肥煤和无烟煤成型制得生物质型煤, 再炭化后生产生物质型焦。研究了生物质配入量、肥煤配入量、成型压力、煤料筛分组成、炭化加热速度对型焦抗压强度的影响。此外, 分析了型焦的组成和孔孢结构。     

无烟煤与添加剂炼焦实验研究

采用马钢炼焦原料研究了无烟煤与添加剂配煤炼焦新工艺.用无烟煤取代部分焦煤的炼焦实验结果表明,在黏结剂PRT和CMC分别为0.5％条件下,无烟煤配入量为14％时所炼出的焦炭的粒焦反应性比9％无烟煤时所炼的焦更低,而反应后强度则高于加入9％无烟煤时所炼的焦,与不加无烟煤所炼的焦的差距很小;此外,在无烟煤配入量为14％时,改变添加剂配比的炼焦实验结果表明,对3-2,3-3及3-5号配方所炼的焦,具有比较好的落下强度与转鼓指数、较低的粒焦反应性和较高的反应后强度,比较接近不加无烟煤的基准焦配方3-1.     

无烟煤配入瘦煤制备优质铸造型焦的研究

介绍了在无烟煤中配入瘦煤、采用改性纸浆废液作为黏结剂制备冷压型焦的试验研究情况,对成型压力、无烟煤与瘦煤的配合比、改性纸浆废液用量和煤颗粒度等主要影响因素进行了探讨,确定了无烟煤、瘦煤配合制备型焦的最佳工艺条件为:成型压力30MPa,无烟煤质量分数48%,瘦煤质量分数40%,改性纸浆废液质量分数12%,煤颗粒度<3mm。采用该工艺可制备优质的二级铸造型焦。     

工艺条件对型焦质量的影响

型焦技术是合理利用非炼焦煤资源或扩大煤焦煤资源的有效途径,工艺条件对型焦质量影响很大。系统阐述了粘结剂、原料粒度、成型压力、氧化或干馏条件对型焦质量的影响。认为成型原料处于最佳粒度分布,成型压力为１５ＭＰａ￣５０ＭＰａ可获高质量型焦。合适的尺寸、形状可减少由高挥发分煤制成的型焦裂纹生成。干馏或氧化条件如氧化温度、氧化时间、干馏最终温度等对型焦质量的影响也进行了论述。同时提出炭化温度达４００℃后采用     

碳和石墨制品的用途和生产(4) 第四章 生产碳和石墨制品的原料

生产碳和石墨制品的原料可分为两类:其一为:各种固体炭质原料,如石油焦、沥青焦、冶金焦、无烟煤、天然石墨。其二为;各种粘结剂、如煤沥青、煤焦油、蒽油、合成树脂。此外还使用一些辅助材料,如石英砂、焦粉及焦粒。生产一些特种炭和石墨制品(     

不同瘦化剂在配煤炼焦中的研究进展

对冶金焦粉、石油焦粉和无烟煤等瘦化剂的来源及性质进行了总结。探讨了不同瘦化剂在配合煤成焦过程中的作用机理。得出冶金焦粉可改善焦炭抗碎强度和提高块焦率;石油焦粉可改善焦炭耐磨强度和反应后强度,降低灰分含量;无烟煤可代替部分瘦煤,降低焦炭反应性和硫含量。     

无烟型煤热稳定性的实验研究

热稳定性是造气型煤的一项重要质量指标，也是煤气发生炉赖以维持正常气化的基础。通过以无烟煤为原料煤，采用正交实验法，研究MS-1型粘结剂、配煤和生物质添加剂的用量对造气型煤热稳定性的影响，找出影响规律并确定出应用于工业生产的最优配方。     

关于合成氨造气原料的探讨—型焦工艺试验

为扩大小型氮肥厂原料来源,按照淮南市的资源情况,以烟煤、焦粉(或无烟煤粉)为原料,我们进行了冷压型内热炼焦制取型焦生产合成氨的试验。型焦工艺包括原料成型和型焦二个部分。曾采用油压机模压成型,煤棒机成型、小型民用煤球机试验。对多种原料配比进行了研究,选用了淮南纸厂碱性废液作粘结剂。焦化工艺,采用气体为载热体,直接焦化型块的方法。试验设备能力3吨/日。     

Effect of coal blending ratio on CO<Subscript>2</Subscript> coke gasification

Coke gasification is largely influenced by the raw coal, catalyst, and blending ratios, pore structure, and specific surface area of the raw coal. In this study, several properties of cokes related to their reactivity were measured using coke reactivity test apparatus (CRTA), scanning electron microscopy (SEM), thermogravimetric analysis (TGA), Brunauer-Emmet-Teller (BET) surface area analysis, and energy dispersive X-ray spectroscopy (EDS) to investigate the characteristics of coke gasification. The results indicated that the reactivity of coke in the temperature range from 950 to 1,050 °C was affected by the type of coke and its specific surface area rather than the general properties of the coke, although the overall reactivities at the other temperatures were uniform. EDS analysis showed that the catalyst acted on the reactivity of cokes at low temperatures, whereas the BET analysis indicated that the reactivity at high temperature was influenced by the specific surface area.     

神木低变质粉煤加入量对型煤型焦性能的影响

以神木低变质粉煤、肥煤与4#主焦煤为原料,配入10%玉米秸秆粘结剂,通过改变神木煤加入量制备出系列型煤型焦.探讨了神木煤加入量对型煤型焦性能的影响.结果表明,神木煤加入量为45%时,型煤型焦性能最佳,型焦工业分析为Mad=0.22%,Ad=12.99%,Vdaf=1.43%,抗压强度与跌落强度分别为3902.6 N/个、99.45%,M25与M10为75.47%、24.53%,符合工业应用标准.随着神木煤配比增加,型煤型焦强度均呈下降趋势.因为神木煤粒度小,空隙率小,比表面积大,进入空隙的粘结剂少,高温热解中不能被胶质体完全包围、粘连,熔融不充分.     

Bonding of solid additives in cokes from coals: a microscopy study

Cortonwood Silkstone (NCB class 401) and Betteshanger (NCB class 301 a/204) coals were co-carbonized with solid additives such as anthracite, coke breeze, green and calcined petroleum cokes. The resultant carbonization products (cokes) were examined by optical microscopy and SEM was used to investigate polished surfaces etched by chromic acid and fracture surfaces. For both coals only the anthracite and green petroleum coke become bonded to the coal cokes. This probably results from softening and interaction of interfaces of the anthracite and green coke with the fluid coal via a mechanism of hydrogenating solvolysis during the carbonization process. The coke breeze and calcined petroleum cokes were interlocked into the matrix of coal coke.     

Properties and structure of metallurgical formed cokes

Properties and structure of formed cokes obtained from various raw materials using different technologies and changes of properties and structure of formed and conventional cokes occurring in the blast-furnace process were investigated. In formed cokes, in distinction from conventional cokes, there are many types of structure depending on the kind of raw materials used and on the technology of formed cokes production. Formed fuels have shown a lower degree of homogeneity and arrangement of structure in comparison with conventional cokes. In the blast furnace process a gradual arrangement of coke structure takes place. The process of structure arranging is more intensive in conventional coke. The petrographic composition of original coals has a great effect on the quality of the formed cokes. Based on the results of structural investigations, changes in the technological process can be introduced, to obtain a product of the desired quality.     

Aspects of gasification and structure in cokes from coals

Cokes were prepared from nine coals of different rank and characterized by surface area measurement, reactivity to carbon dioxide at 1473K and Raman-laser spectroscopy. Rates of gasification of cokes on a unit surlface area basis (K¹ = g m^?2 min^?1) decreased with increasing rank of parent coal based on maximum oil reflectances. However rates of gasification could not be related to coke structure as measured by Raman-laser spectroscopy.     

一种无烟煤型焦洁净生产技术

介绍一种符合国家可持续发展战略的洁净型焦生产系统－以无烟粉煤为主要原料的型煤竖炉炼焦技术,并对其社会效益和经济效益进行初步评估。该型焦技术是以无烟粉煤为主要原料（占70％）,添加少量烟煤及粘合剂生产型煤,型煤进入连续运行的竖炉炼焦,所产煤气经净化后用作焦炉及型煤干燥的热源。其炼焦生产全过程密闭、连续、焦化时间短、无污染,产品块度及挥发分等主要指标调整灵活。     

低阶煤制备活性焦及其吸附性能研究

为解决煤化工废水处理难题,提高活性焦吸附性能,以5种典型低阶煤为原料,通过回转炉炭化和活化工序制备活性焦,研究活化温度、活化蒸气量和活化时间对活性焦吸附性能的影响,分析了不同活性焦对废水的吸附能力。结果表明:以褐煤为原料制备活性焦时,最佳活化温度为800℃,活化时间为3 h,活化蒸气量为1050 g;长焰煤最佳活化温度为850℃,活化时间为4 h,活化蒸气量为1200 g。在最佳条件下,褐煤活性焦的吸附值为36.32 mg/g,比长焰煤活性焦吸附值高10%。5种原煤制备的活性焦的比表面积与吸附值没有明显相关性。活性焦的孔容积越大,吸附值越高,造成不同活性焦吸附值差别的主要孔径为2~5 nm和5~20 nm。