焦炭质量预测方法的应用

以太原煤炭气化(集团)有限责任公司的工业焦炉数据为基础,建立了该公司的焦炭质量预测模型。利用单种煤和配合煤的各种性质指标预测焦炭质量,并指导配煤,以获得稳定的焦炭质量。     

煤场管理系统的优化

煤场管理直接影响焦炉生产和焦炭品质的稳定,煤场能否合理有效地运作,对减少倒运量、降低装炉煤成本、稳定配合煤及焦炭品质,都有重要的作用。对煤场管理系统进行了优化。     

提高焦炭热强度稳定率的措施与分析

为提高韶钢6 m焦炉焦炭热强度稳定率,分析了国内1#焦煤煤质、焦煤水分、清场含杂煤配用量、配煤比调改次数等对焦炭热强度稳定率的影响,通过加强对焦煤煤质、焦煤水分、清场含杂煤的管控,减少配煤比调改次数,使焦炭热强度标准偏差σn-1由2018年第1季度的1.64降低至第4季度的0.95,提高了焦炭热强度稳定率。     

影响焦炭热态性质的因素探讨

对皖北17种煤样进行了性质分析及40kg小焦炉炼焦试验,结果表明,灰分中的碱性氧化物对焦炭的溶损反应起着正催化作用,其含量越大,焦炭的反应性越大;挥发分含量在20%～24%、镜质组反射率在1.3～1.8之间的煤,焦炭的反应性和反应后强度较好;硫的存在能抑制焦炭的CO2反应性,随着硫含量的增高,焦炭的反应后强度有所提高.建立的预测模型具有一定的可靠性与稳定性.     

配用加拿大煤炼焦的研究和实践

为优化焦炭质量,扩大炼焦煤资源,对加拿大煤进行了单种煤炼焦试验和配煤炼焦试验,通过不同级别的试验,优选出最佳配煤方案并运用于生产中。研究发现:该加拿大煤稳定性好,配加10%可在保持焦炭强度不变的前提下,部分替代优质主焦煤,并有效降低焦炭灰分、硫分。     

炼焦配煤工艺的改进与效果

针对煤源市场和高炉生产对焦炭质量要求的变化,通过对煤场、煤槽工艺布局的改进,实现了配合煤、焦炭质量指标稳定率的提高,为炼铁高炉生产提供了符合要求的优质燃料。     

Effects of weathered coal on coking properties and coke quality

Determinations of weathered coal by petrographic methods, and coking tests in an 18-inch ($\text{≈}\text{1}\text{2}\text{m}$) test oven were used to quantify the effects of weathered coal on coking properties and coke quality. The results show that the presence of weathered coal causes a decrease in coke stability and coking rate and an increase in coke reactivity and coke-breeze generation. Because these effects contribute to increased costs in both the coke plant and the blast furnace, every effort should be made to reduce the amount of weathered coal in coking coal mixes.     

Ensuring stable coke properties

Information is presented regarding the coal used for coke production in 2010. At least four problems must be addressed in order to ensure stable coke properties. The first three are associated with exhaustive information regarding the coal batch, the stability of its properties, and the uniformity of the coal supplied to the enterprise. The fourth is associated with the method of calculating coal batch of specified quality and properties. An approach to the fourth problem is proposed.     

提高焦炭热强度稳定率的方法

结合韶关钢铁集团有限公司的生产实际情况,分析了影响焦炭热强度稳定率的主要因素,介绍了提高焦炭热强度稳定率的主要方法。热强度σn-1系数与焦炭热强度稳定率呈负相关,σn-1系数降低,则焦炭热强度稳定率提高。实践结果表明,在配煤炼焦过程中,通过完善配煤管理制度、稳定精煤质量、降低环境影响和规范配煤操作等措施,使σn-1系数从2011年的3.26降至2012年的2.27。     

Effects of binder on recovery stamp charged coke making process

The optimum stability of coal cake is essential for producing good quality of coke in stamp charged coke making process. A suitable binder named as ‘X7’ was identified to improve the stability of coal cake, oven throughput, coke quality and reduce specific energy consumption for stamp charged coke making process. Laboratory results show that addition of ‘X7’ in coal blend up to 0.10–0.50 percentage, improved the mechanical strength of coal cake by 3.0–5.0 percentage. Six hundred kg pilot plant trials show that addition of binder in the base coal blend improved coke quality in terms of CSR, M ₄₀ and AMS significantly. Coke plant trials also show that ‘X7’ addition (0.10%) in base coal blend improved coke quality in terms of CSR (1.25 point), M ₄₀ (0.9 point) and AMS (1.70 mm). Addition of ‘X7’ increased Coke End Temperature up to 24°C during plant trials. The increased in temperature saved energy approximately 11 000 Gcal and reduce CO₂ emission by at least 10 000 T/Annum.     

灰渣对石油焦浆稳定性的影响研究

采用气化灰渣作为石油焦浆的稳定剂,考察了灰渣对石油焦浆稳定性的影响。结果表明:灰渣能够有效提高石油焦浆的稳定性,提高屈服应力。当固体质量分数为63%,灰渣质量为总固体颗粒质量的20%—25%时,制备出的水焦浆满足工业要求。石油焦1添加质量分数15%的灰渣最高可制备出固体颗粒质量分数为70%的水焦浆,添加质量分数为20%的灰渣,石油焦2最高可制备出固体颗粒质量分数为67%的水焦浆。适量的灰渣可以作为石油焦浆的稳定剂制备固体质量分数高的水焦浆。     

60万t/a焦化工程焦炉煤气脱硫方案比选案例

介绍了在环境影响评价中对冶金焦炉煤气脱硫技术方案的比选方法,从投资额、工艺原理、原料和产品、运行费用、运行稳定性、动力和人工费用等方面进行比较,寻找到更为合理可行的焦炉煤气脱硫方法。     

不同煤配比对胶质层指数的影响研究

为提高焦炭质量,降低生产成本,采用陕北地区常见的气煤、肥煤、东风煤进行单独炼焦,分析3种煤单独炼焦时生成的焦炭质量。在此基础上将3种煤按不同比例配煤炼焦,分析不同配比下焦炭质量的变化,研究最佳配煤方案。结果表明：气煤单独炼焦所得焦炭质量差,但配入气煤可增加产气率和焦饼收缩度;肥煤是优质炼焦煤,但单独炼焦所得焦炭气孔率高,需配煤以改善焦炭质量;东风煤无法单独炼焦,但少量配入可增加焦炭强度,减少优质炼焦煤用量。气煤、肥煤、东风煤质量比为1∶6∶3时,焦炭质量最好,孔隙小,无缝隙和绽边,色泽为银灰色,无海绵体,部分熔合;配煤胶质层最大厚度Y=20.4 mm,最终收缩度X=7.2 mm。     

顶装焦炉生产化工焦的试验研究

以顶装焦炉生产冶金焦炭的配煤比为基准,减少价格高的主焦煤的比例,增加气煤、贫瘦煤等价格较低的煤种,制定了多种生产化工焦的配煤比例,先在小焦炉试验找出最佳配比,然后在顶装焦炉进行试生产,取得了较好的效果。所生产的化工焦能满足公司甲醇厂造气炉的使用要求,替代了原使用的小块焦,降低了配煤成本及造气成本,提高了经济效益。     

高硫石油焦气化研究进展和技术经济分析

分析我国高硫石油焦的生产现状和利用过程中存在的问题,对影响石油焦气化反应活性的因素、石油焦的催化气化和石油焦与煤或生物质共气化等方面的研究以及石油焦气化的工业应用进展进行了总结;探讨高硫石油焦配煤气化的可行性,对高硫石油焦配煤气化和干煤粉气化方案分别进行了模拟计算及技术经济分析,并与工业上掺烧高硫石油焦气化的运行结果进行了比较,与干煤粉气化相比,高硫石油焦配煤气化的比氧耗、比煤耗降低,有效合成气产量增加,具有较好的经济性;采用高硫石油焦配煤气化制取合成气既可以解决高硫石油焦的利用问题,又能拓宽煤气化的原料范围,是一条高效、清洁利用高硫石油焦的新途径。     

在配煤中添加石油焦对焦炭质量的影响

研究了在配煤中添加石油焦对焦炭质量的影响。采取配比为5%的不同粒度的添加方案进行配煤炼焦实验,最佳配煤方案与武钢生产配煤焦炭相比,灰分降低0.57%,硫分增加0.02%,抗碎强度基本不变,耐磨强度M10下降0.95%,反应性降低3.12%,反应后强度提高6.59%。焦炭的X-射线衍射对比测试表明,在配煤中加入石油焦能促进焦炭各向异性的发展。     

捣固炼焦值得关注的几个问题

叙述了捣同炼焦配煤与焦炭质量的关系及捣固强度与配煤的关联性.指出:焦炭质量的基础是配煤质量,不会因煤准备和炼焦工艺等有根本性的改变;捣固炼焦可多用低变质程度,高挥发分气煤类的炼焦煤生产出一定质量的焦炭;捣同炼焦配煤适当增加黏结性配煤比例可提高焦炭质量,但用接近顶装焦炉的配煤进行捣固炼焦将丧失其优势并引发问题.捣固焦炉的...     

Comparison of flame propagation properties of petroleum coke and coals of different rank

Ignition and flame propagation characteristics of 18 kinds of coal and a petroleum coke were investigated through a laser ignition experiment. Flame stability was strongly influenced by amount of volatile matter and pyrolysis rate. Lean limit of flame propagation was strongly influenced by amount of volatile matter. Flame propagation was observed when pyrolized volatile matter was mixed with surrounding air or oxygen, until the concentration of pyrolized volatile matter reached a constant value. Flame propagation velocity was strongly influenced by pyrolysis rate. As the pyrolysis rate increased, the flame propagation velocity increased. The flame propagation velocity of petroleum coke was higher than that of coal with the same volatile content. The flame propagation of petroleum coke was superior to what was expected based on the volatile content, primarily because the high pyrolysis rate caused a shorter ignition delay than what would be expected given the volatile content. A database for the lean limit of flame propagation was used to develop a flame stability model to estimate lean flammability of a large-scale burner. The model could predict the effect of the coal rank, the particle diameter distribution for lean flammability limit. The estimated lean flammability limit of petroleum coke (volatile content 11.5%) was equal to that of lv bituminous coal with volatile content of about 15%.     

Effects of chemicals and blending petroleum coke on the properties of low-rank Indonesian coal water mixtures

In this study, the effects of different chemical additives including dispersant and stabilizer on the solid loading, viscosity, rheological behaviour and static stability of coal water mixtures have been investigated. In the experiments, naphthalene sulfonate formaldehyde condensate (NSF) was selected as dispersant and carboxymethyl cellulose sodium salt (CMC-Na) and nano-stabilizer were employed as stabilizers. An Indonesian low-rank coal, taken from Berau, East Kalimantan, was used for the study. To obtain high-loaded slurry, Liaohe petroleum coke was used to blend with Indonesian coal sample. The results of the experiments showed that adding chemical additives and blending Liaohe petroleum coke can effectively improve the slurryability of Indonesian low-rank coal.     

石油焦配煤炼焦试验研究

通过对石油焦的特性研究及配煤炼焦试验,考察其对配煤黏结性能及焦炭质量的影响,研究结果表明,添加石油焦会引起煤的黏结指数下降,加入石油焦配煤炼焦会降低焦炭灰分,提高焦炭硫分,降低焦炭冷强度,提高焦炭热强度。