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《煤化工》2021,49(3)
介绍了淮南矿业1/3焦煤的煤质特点和炼焦特性,并将淮南矿业1/3焦煤与山东、黑龙江、内蒙古、河北、山西等地区的1/3焦煤进行了比较分析。结果表明,淮南矿业1/3焦煤具有低硫、黏结性强及结焦性好的特点,单独炼焦所得焦炭机械强度、反应性及反应后强度均优于1/3焦煤平均值;淮河一号镜质组平均最大反射率为0.932%,单独炼焦所得焦炭反应后强度高,兼具优良的结焦性和黏结性,属于变质程度较高的优质1/3焦煤;淮河二号低硫、黏结性强,可以作为1/3焦煤使用;淮河三号具有低灰、低硫的特点,可有效降低配合煤灰分、硫分。在优质焦煤、肥煤多为高硫煤的企业和地区,使用淮南矿业1/3焦煤可以提高煤源利用空间,改善配煤结构。 相似文献
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开滦矿区的炼焦精煤主要有粘结性强、结焦性好的肥煤、焦煤及 1 3焦煤 ,灰、硫含量为中等水平 ;代替鞍钢单种煤的炼焦试验取得了较好的效果 ,焦炭强度、粘结指标均可提高 ;开滦炼焦精煤可取代鞍钢现用的肥煤、焦煤和 1 3焦煤用于炼焦 ,并可提高焦炭强度。 相似文献
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以企业生产实践为背景,研究在配合煤中增配肥煤和1/3焦煤对焦炭综合热性质的影响。对不同配比配合煤的性质指标进行检测,采用40 kg焦炉实施炼焦试验,并对炼制焦炭的传统国家标准热性质指标和利用自主研制装置测得的综合热性质指标进行测定。结果表明:增配肥煤和1/3焦煤,均会使配合煤的变质程度降低,挥发分含量升高,胶质体的黏结能力下降,但胶质体的量保持不变。配比变化引起的配合煤性质指标的变化没有显现在焦炭的传统国家标准热性质指标反应性CRI和反应后强度CSR上。以往的研究都是以CRI和CSR指标为目标量判断配合煤的配比是否合适,本研究除此之外还采用了自主提出的焦炭综合热性质指标。配合煤配比变化引起的焦炭的综合热性质指标变化比国家标准热性质CRI和CSR指标变化敏感,这可能与其反映了焦炭某些新的特征有关。基于焦炭综合热性质指标的变化规律,考虑到1/3焦煤具有经济性,生产上增配某些特定的1/3焦煤,可以同时达到提高焦炭质量和降低配煤成本的目的。 相似文献
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针对济钢焦化厂6#、7#焦炉焦炭M40下降约2%,相关部门对槽内煤质、配煤准确度、焦炉热工操作及配煤指标等系统进行了排查,确认了配用的瘦煤G值低导致配合煤黏结性不足是本次波动的主要原因。通过调整配煤结构、提高配合煤黏结性、延长结焦时间等措施,使焦炭质量恢复到M40 84.0%的正常水平。并提出要建立焦炭质量波动预警机制,提高焦炭质量过程控制能力,加强操作、管理水平,以确保高炉生产顺利进行。 相似文献
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煤的荧光特性与其工艺性能的关系研究 总被引:1,自引:0,他引:1
简述了煤中镜质组荧光产生的机理及荧光参数的测量方法,通过测定一系列煤的粘结性和10kg小焦炉结焦性试验,探讨了煤的荧光特性与其工艺性能的关系。煤的荧光参数与其反射率呈正的线性相关关系,与其挥发分含量呈负的线性相关关系;煤的粘结性、结焦性均与其荧光参数有关;当煤化程度相同、煤岩组成基本相同时,煤的荧光强度愈强,其结焦性能愈好。 相似文献
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Solvent extractions of two different types of Chinese rich coals i.e. Aiweiergou coal (AG) and Zaozhuang coal (ZZ) using the mixed solvent of carbon disulfide/N-methyl-2-pyrrolidinone (CS2/NMP) with different mixing ratios were carried out and the caking indexes of the extracted residues were measured. It was found that the extracted residues from the two types of coals showed different changing tendencies of the caking indexes with the extraction yield. When the extraction yield attained about 50% for ZZ coal, the extracted residue had no caking property. However for AG coal, when the extraction yield reached the maximum of 63.5%, the corresponding extracted residue still had considerable caking property with the caking index of 25. This difference indicated the different associative structure of the two coals although they are of the same coalification. Hydro-thermal treatment of the two rich coals gave different extract fractionation distributions for the treated coals compared to those of raw coals respectively. The coking property evaluations of the two coals and their hydro-thermally treated ones were carried out in a crucible coking determination. The results showed that the hydro-thermal treatment could greatly improve the micro-strengths of the resulting coke from the two coals, and the improvement was more significant for the more aggregated AG coal. The reactivities of hydro-thermally treated AG coal blends were almost the same as those of raw coal blends. The higher coke reactivities of AG raw coal and its hydro-thermally treated ones than those of ZZ coal might be attributed to its special ash composition. 相似文献
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M. Minkina 《Fuel Processing Technology》2010,91(5):476-485
Lumps of six bituminous coals, from 20 to 40 mm in size, were devolatilized in a laboratory oven in nitrogen atmosphere at different final temperatures ranging from 300 to 800 °C. The structure and morphology of the resulting chars with different degree of devolatilization have been examined under an optical microscope in order to better understand the formation mechanism of different types of char. The swelling of the caking coals and the fissuring of the non-caking coals were characterised by image analysis and some correspondences between the distribution of lithotypes within the initial coal lumps and the char structure obtained were revealed. The relation between chars structure and properties was also investigated. The char lumps obtained from caking coal exhibit better resistance to breakage than their parent coal lumps while non-caking coals show the opposite behaviour. For both caking and non-caking coals, a significant decrease of resistance is observed in the intensive devolatilization temperature range from 400 to 600 °C. 相似文献
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为扩大炼焦煤资源,降低配煤成本,采用鄂尔多斯盆地南部渭北煤田西部矿区10号煤层的中高硫瘦煤为试验煤样,分析了煤样基本性质,说明其具有高硫、低灰的特点,黏结指数和胶质层厚度较一般瘦煤高,活惰比接近2,黏结性和结焦性较好。通过中高硫瘦煤单独成焦试验、煤岩学模拟配煤、工业焦炉炼焦试验,验证中高硫瘦煤配煤炼焦的可行性,确定中高硫瘦煤配煤炼焦优化方案。结果表明:中高硫瘦煤配煤炼焦可行,应尽量控制中高硫瘦煤配入量在10%以下,多配入强黏结性煤,以提高焦炭的热态强度。中高硫瘦煤配煤炼焦工业应用表明:配入中高硫瘦煤3%~7%可生产出质量合格的焦炭,扩大了炼焦用煤范围,降低了配煤成本。 相似文献