粘结剂用沥青的生产

文章介绍了几种国内外粘结剂用煤焦油沥青的生产工艺，阐明分析了每一工艺的特点。根据国内外煤焦油加工的现状，对提高我国粘结剂用煤焦油沥青质量提出了建议。     

煤沥青高附加值产品开发及应用

煤焦油沥青深加工以提高沥青产品的附加值是煤焦油加工中的一个重要问题，概述了煤焦油沥青深加工技术现状，并对改质沥青（浸渍剂、粘结剂、中间相）、炭纤维、针状焦等高附加值产品的技术开发、生产及应用进行了分析。     

煤沥青高附加值产品开发及应用

煤焦油沥青深加工以提高沥青产品的附加值是煤焦油加工中的一个重要问题．概述了煤焦油沥青深加工技术现状,并对改质沥青（浸渍剂、粘结剂、中间相）、碳纤维、针状焦等高附加值产品的技术开发、生产及应用进行了分析．     

炭材料用沥青的制造方法

以煤沥青，煤焦油或石油系热裂解重油为原料，经脱除了碱溶液可溶处处理后，将不溶成分于３６０－４５０℃的温度下进行热处理制备炭材料用粘结剂沥青。     

煤焦油沥青深加工利用综述

概述了国外煤焦油沥青深加工利用现状 ,并对改质沥青 (浸渍剂、粘结剂 )、筑路沥青、涂料、碳纤维、针状焦等煤沥青深加工产品的技术开发、生产及应用进行了分析     

中间相沥青用作MgO—C砖粘结剂

文中介绍了离心法净化煤焦油沥青，经热聚合反应制取中间相沥青用作ＭｇＯ－Ｃ砖粘结剂，通过正交试验可获得制取中间相沥青的最佳工艺条件，在相同的热处理条件下，对比了中间相沥青粘结剂和酚醛树脂的性能，试验结果表明，中间相沥青粘结剂质量明显优于酚醛树脂。     

用煤焦油沥青和石油沥青作粘结剂的焙烧碳制品的物理特性

通过对煤焦油沥青和石油沥青作粘结剂的焙烧碳制品物理特性的研究,探讨了它们在碳制品制造中的适用性和相关性。本文说明了煤焦油沥青是最适宜的粘结剂。用与煤焦油沥青相同软化点的石油沥青作粘结剂制得的碳制品的质量差,但将石油沥青软化点从78℃提高到150℃或在低软化点沥青中加入10％碳黑,则提高了焙烧碳制品的密度、强度和电阻系数。在高软化点石油沥青中加入10％碳黑形成的碳制品,能进一步提高其密度和强度值。这些值可以同用煤焦油沥青得到的值相比。但是,电阻系数有所提高。高芳香性的石油沥青可以作为一种良好的粘结剂加以使用。     

对粘结剂用中温煤沥青品质的评价之讨论

论述了目前我国电炭行业粘结剂用中温煤沥青的评价方法,分析了该评价方法的优缺点。借鉴近十多年国内外对煤沥青性质的新研究成果,对粘结剂用中温煤沥青品质的评价进行分析计论,在此基础上提出了新的评价方法。     

改善改质沥青反应釜结焦的措施

改质沥青是煤焦油沥青经高温热聚反应加工而成的高附加值化工产品,用于制取电炉炼钢用的石墨电极、电解制铝的电极板及电极糊等碳素制品的粘结剂.由于其产量占煤焦油产品量的50%左右.因此.其产量及质量对煤焦油加工的整体效益具有决定性影响.我国是世界第三大产铝国,随着我国赋钢铁及铝产品结构的调整,高功率及超高功率电极的需求日益增加,加之碳素行业的飞速发展,对优质沥青的需求逐年增加.国外焦化行业由于受环保的限制而呈现萎缩,导致对改质沥青进口的增加.正由于改质沥青产品有着广阔的国内国际市场及较高的利润,近年来国内各大焦化厂相继增建了改质沥青生产装置,使产品的市场竞争日趋激烈.     

改质沥青及其在石墨电极生产中的应用

本文简单介绍了国内改质沥青的生产方法和实物性能、对改性沥青的性能的评价方法、改 质沥青用作石墨电极粘结剂时的工艺特点以及国内外生产实例。目的在于为炭素厂试用改质沥青作为石墨电极生产用粘结剂提供参考。     

Production of petro/coal tar pitch by joint distillation of coal tar and heavy pyrolytic oil

The properties of petro/coal tar pitch and distillate fractions obtained in the joint distillation of coal tar and heavy pyrolytic oil from ethylene production are described. The petro/coal tar pitch is particularly reactive in heat treatment and air-blowing. The petro/coal tar pitch may be used as less carcinogenic binder and impregnating electrode pitch.     

煤沥青与橡胶改质筑路油族组成分析

利用石油道路沥青 ４ 组分分离方法,测定了石油沥青、石油道路沥青以及煤沥青的族组成。利用该测定结果指导煤沥青橡胶改质筑路油的开发和橡胶改质的机理研究,并在此基础上成功地开发出高质量的煤沥青筑路油新产品。建立了能关联煤沥青组成与软化点之间关系的方程。     

Production of coal tar/petroleum pitch by the combined distillation of coal tar and heavy cycle oil at JSC Gubakhinskii Koks

Coal tar/petroleum pitch has been produced by the combined distillation of coal tar and heavy cycle oil from catalytic cracking, in industrial trials. In processing a 60: 40 mixture of those components, 306 t of pitch that meets the requirements for anode binder is produced. The benzo[a]pyrene content is lower in the petroleum–coal pitch than in regular coal pitch used in electrode production.     

粘结剂用煤沥青的发展状况

综述了粘结剂用煤沥青的组成,性能及发展历程;探讨了改质煤沥青的特性及生产方法。     

Preparation of micro-porous monolithic activated carbon from anthracite coal using coal tar pitch as binder

Monolithic activated carbon (MAC) has been produced from steam activation of monoliths prepared by mixing coal powders with high-temperature coal tar binder for a long time. However, this process leads to poor working conditions, environmental pollution, and waste of resource. This study investigated the use of coal tar pitch as binder to prepare MAC with high surface area, micro-pore structures, and strong mechanical strength. The performances of the MACs with both coal tar and coal tar pitch as binders were compared. The product yield of MAC bonded with coal tar pitch (MAC_p) was 10% higher than that with coal tar (MAC_T). The BET surface area, micropore volume, and average pore diameter of MAC_P were 837.99 m² g^?1, 0.346 m³ g^?1, and 1.776 nm, respectively, which were all superior to the corresponding values of MAC_T. Only the attrition resistance strength of MAC_P was slightly lower than that of the MAC_T. The SEM images showed that the cokes on the surface of both MACs distributed identically and uniformly. Furthermore, XRD results revealed that the pore-expanding reactions mainly led to the reduction of carbon crystallite along with the stacking direction rather than horizontal direction during steam activation process. This work demonstrates that cost-effective MAC can be prepared with the coal tar pitch as binder and the results of the investigation presented in this work provide new and important information necessary to the successful application of MACs in industrial field.     

Utilisation of the binders prepared from coal tar pitch and phenolic resins for the production metallurgical quality briquettes from coke breeze and the study of their high temperature carbonization behaviour

To reduce the cost of the formed coke briquettes which can be used as a substitute fuel to the metallurgical coke for the blast furnace from the coke breeze alternative binders and their blends were used. The high temperature behavior was investigated. The binders tested were: the nitrogen blown, air blown coal tar pitch and the blend of air blown coal tar pitch with the phenolic resins blends. The phenolic resin blends were prepared by mixing equal amount of resole and novalac. From the results, nitrogen blowing resulted in the weakest briquettes. The air blowing procedure should be preferred in place of nitrogen blowing for this purpose. When the air blown coal tar pitch was used alone as a binder, the briquettes must be cured at 200 °C for 2 h, then carbonized at a temperature above 670 °C. Since it requires higher temperature at carbonization stage, using air blown coal tar pitch alone as a binder was not economical. Therefore, the briquettes were prepared from the blended binder, containing air blown coal tar pitch and phenolic resins blend. The optimum amount of air blown coal tar pitch was found to be 50% w/w in the blended binder. Curing the briquettes at 200 °C for 2 h was found to be sufficient for producing strong briquettes with a tensile strength of 50.45 MN/m². When these cured briquettes were carbonized at temperatures 470 °C, 670 °C and 950 °C, their strength were increasing continuously, reaching to 71.85 MN/m² at the carbonization temperature of 950 °C. These briquettes can be used as a substitute for the metallurgical coke after curing; the process might not require un-economical high temperature carbonization stage.     

CO2 separation by carbon molecular sieve monoliths prepared from nitrated coal tar pitch

The objective of the present work is to develop a simple procedure, which avoids the need of a binder, to obtain activated carbon monoliths from a waste precursor (coal tar pitch) suitable for CO₂ capture and/or separation. The main task of this process consists of a nitration process of the coal tar pitch. This nitration step over the coal tar pitch is characterised by different techniques, such as infrared spectroscopy and thermogravimetric analysis. The nitration treatment produces the oxidation of the pitch molecules, leading to hydrogen consumption and generating oxygenated and nitrogenated surface complexes. As a consequence of this oxidation, nitrated coal tar pitch is an infusible material, which allows the carbonization of monolithic pieces avoiding their fusion. Decomposition of these surface complexes during the carbonization of monoliths generates narrow microporosity, which is suitable for CO₂ capture from gas streams at room temperature. The molecular sieving properties of these materials are studied by CH₄ and CO₂ adsorption kinetics.     

Rheological characteristics of coal tar and petroleum pitches with and without additives

An extensive study of rheological characteristics of coal tar and petroleum pitches with and without additives, namely, petroleum coke, natural graphite and carbon black has been made. It is found that all pitches, pure or mixed with a carbon additive are not Newtonian as reported in the literature, but behave Theologically as Bingham plastics with certain yield stress and plastic viscosity at all temperatures of measurement between 85–180°C. The yield stress and plastic viscosity both decrease with increase in temperature of the pitch. A pure petroleum pitch having the same softening point as that of a coal tar pitch is found to have a lower viscosity compared to that of the latter at all temperatures of measurement. This suggests that the criterion of softening point as a measure of suitability of a coal tar pitch binder in the manufacture of artificial carbon is not sufficient for petroleum pitches. Addition of ten parts of carbon black by weight of pitch results in a considerable decrease in viscosity change with temperature of the coal tar pitch compared to almost insignificant change in the case of the petroleum pitch of the same softening point. However, the addition of petroleum coke or natural graphite makes the pitch more viscous but does not change the temperature dependence of viscosity of either of the two types of pitches. The implications are discussed.     

煤质压块成型活性炭的制备研究

文章研究了以烟煤为主要原料,太西煤为配煤,乙烯-醋酸乙烯共聚体热熔胶和煤沥青作黏结剂制备煤质压块活性炭的制备工艺,探讨了烟煤的预氧化处理对活性炭性能的影响。实验结果表明：烟煤预氧化处理,以及加入适当太西煤和黏结剂,有利于提高活性炭的强度,改善压块活性炭的吸附性能;并在工艺试验研究工作的基础上,制备出中微孔结构发达、性能稳定的煤质压块活性炭。     

The influence of the type of quinoline insolubles on the quality of coal tar binder pitch

Seven pitches containing three types of quinoline insolubles, QI, were produced from a single coke oven coal tar. The tar was centrifuged into QI-rich and QI-lean fractions. A blend of the two fractions yielded a typical graphite electrode binder pitch. The QI content of the pitch derived from the QI-lean tar was increased through the addition of natural QI concentrate, or QI as a furnace carbon black, or QI as mesophase by means of heat treatment. The pitches were evaluated as binders by measuring the flexural strength of 19 mm diameter graphite electrodes. The results show that the typical electrode pitch is superior, and that increasing the QI content of the QI-lean material did not upgrade it. The results also show that the flexural strength of the derived graphite is not simply related to the coking value of a binder.