用锦州石油焦代替沥青焦生产石墨电极的研究

研究了锦州石油焦的性能,结果表明可以用煅后锦州石油焦代替沥青焦生产石墨电极。用锦州石油焦代替沥青焦生产的Φ350mm石墨电极的理化指标优于YB4088－92标准。因此电极炼钢消耗降低,电极制造成本下降。     

锦州石油焦性能及其生产普通石墨电极的质量

通过对锦州焦与大庆焦的对比实验，分析了锦州焦的特性。与大庆焦相比，锦州焦的灰分偏高，挥发分偏低、硫含量稍高，煅后焦颗粒强度大，堆积密度大；用锦州焦制造的各种规格石墨电极，其CTE、体积密度、强度、电阻率均比大庆焦的高。     

用胜利焦生产石墨电极的工艺控制

用胜利焦生产石墨电极的工艺控制刘炳强，刘振昌（山东生建八三厂淄博２５５３１１）１前言用石油焦生产石墨电极时，其中的硫含量是衡量石油焦质量的主要指标之一，它主要来源于原焦油。高硫石油焦在石墨化过程中将产生某种程度的不可逆体积膨胀，究其原因主要是由于硫分...     

石墨碎在电极生产中的作用

通过石墨碎、大庆石油焦、锦州石油焦的对比试验,分析了石墨碎的性能,并通过生产试验,分析了石墨电极生产中加入石墨碎对生产及产品的影响。石墨碎具有真密度高、体积密度大,电阻率、CTE偏低,振实密度、颗粒强度大等优点。在石墨电极生产中加入一定的石墨碎可以提高产品的体积密度、强度,降低电阻率等。     

Φ350～Φ500mm准超高功率石墨电极生产

准超高功率石墨电极性能介于超高功率石墨电极和高功率石墨电极之间,其性能指标接近超高功率石墨电极,既能满足超高功率精炼炉和高功率电弧炉炼钢对石墨电极的要求,而生产制造成本较超高功率石墨电极有较大幅度地降低,又能有效降低炼钢成本。本文对山西晋能集团大同能源发展有限公司炭素分公司使用3种国产石油焦煅烧焦分别与进口高级、普通级针状焦按一定比例相配比生产Φ350～Φ500mm准超高功率石墨电极进行介绍。成品检验结果表明,研制的准超高功率石墨电极各项理化指标均接近超高功率石墨电极,可满足超高功率精炼炉的生产需要。     

下游趋冷 石墨电极市场信心有待恢复

6月初，石墨电极市场价格总体走势平稳。石油焦市场的波谲云诡，令生产企业应接不暇，业内人士对后市心存担忧。低硫焦价格的下调是影响石墨电极价格走向的一个因素。而另一个主要因素在于，下游采购放缓。     

用锦西焦加CGG针焦生产Ф450mm高功率石墨电极

分析了锦西焦与CGG油系针状焦的特性；以锦西焦为主加CGG油系针状焦为原料，生产Ф450mm高功率石墨电极，并对其生产过程中的工艺进行控制。结果表明：用锦西焦为主加CGG油系针状焦生产Ф450mm高功率石墨电极是完全可行的。     

国产宏特针状焦生产Φ350mm超高功率石墨电极

以国产针状宏特焦为原料采用传统生产流程及国际标准流程生产Φ350mm超高功率石墨电极,并对其生产过程中的工艺进行控制。结果表明,用国产宏特针状焦为原料采用国际标准流程生产Φ350mm超高功率石墨电极,理化指标完全达到用新日铁针状焦为原料生产Φ350mm超高功率石墨电极等同类产品,通过钢厂试用,其抗热震性能、抗氧化性能、消耗性能较好,能完全满足用户的使用要求;同时实现超高功率石墨电极国际标准流程,进一步降低生产成本。     

以大庆石油焦代替沥青焦研制高纯石墨的探讨

论述了以大庆石油焦为主生产高纯石墨的可行性,为大庆石油焦代替沥青焦生产高纯石墨以及在实际生产中为两种不同焦炭的互换提供了一些理论认识和实践经验,并可为某些品种的电碳制品所采用。     

电炉钢产能扩大，大规格超高功率石墨电极用量增加针状焦大规模国产化迫在眉睫

针状焦是生产大规格超高功率石墨电极的主要原料，石墨电极的最终性能在很大程度上取决于原料针状焦的性能。由于大规格超高功率石墨电极必须有良好的物理机械性能（电阻率低、体积密度大、机械强度高、热膨胀系数小、抗热震性能好），普通石油焦无法满足要求，只有以针状焦为原料生产的石墨电极，才能达到超高功率电炉冶炼工艺的要求。     

油系针状焦的市场前景与技术发展

针状焦是一种新型炭材料,是20世纪70年代碳素材料大力发展的一个优质碳种,主要用于生产高功率(HP)和超高功率(UHP)石墨电极,目前在我国工业性开发获得成功。就我国油系针状焦的研发过程、生产工艺、技术进展、研发生产过程的技术难点及应用市场进行了简要论述。     

特级锦州石油系针状焦试制Φ300mmUHP石墨电极

阐述了用特级锦州石油系针状焦试制Φ300mmUHP石墨电极的全过程,并对压型、焙烧、浸渍和石墨化等工序的抽样编号电极进行直径、长度、质量和体积密度等数据跟踪。结果表明,特级锦州石油系针状焦可以用来生产Φ300mmUHP石墨电极。     

Assessment techniques for graphite electrodes

The consumption of graphite electrodes in electric arc furnaces represents a significant proportion of the cost of steelmaking. Recent escalations in the cost of petroleum coke and, in the largest furnaces, increased consumptions associated with high power inputs have focussed attention on the properties of electrodes and their relation to service behaviour. Mechanical strength and electrical resistivity have been found to be related to consumption and extensive monitoring of these properties has been undertaken. Laboratory investigations of electrode properties have been made using techniques well established in the fields of refractories and concrete technology. These include the determination of pore-size distribution, thermal shock resistance and ultrasonic pulse-transmission velocity. The results obtained are discussed in relation to the basic objectives of achieving minimum electrode consumption and establishing meaningful quality-control procedures.     

Prospects for production of structural graphites for nuclear power engineering and other sectors of industry at the Chelyabinsk Electrode Plant Joint-Stock Co.

The results of a study of the properties of VPG-grade reactor graphite based on calcined pitch coke currently used as an alternative to KNPS-grade petroleum coke are reported. Technologies for production of new high-density fine-grained graphites based on calcined pitch coke and uncalcined pitch and resin cokes have been developed. Different shaping techniques — extrusion and hot pressing — have been tested. The newly developed high-density fine-grained graphites display superior physicomechanical properties and can be used for service in modified high-capacity reactors.Translated from Novye Ogneupory, No. 8, pp. 6 – 10, August, 2004.     

石油焦细粉煅烧研究

目前石油焦细粉含量越来越高,已严重影响了预焙阳极煅烧、配料等生产过程,选用不同于煤沥青的4种黏结剂对石油焦细粉进行成型、煅烧等工艺处理,并分析了真密度、粉末电阻率、强度、热稳定性等性能。实验结果表明,本研究能改善细粉含量过高石油焦的煅烧质量。     

Neuere Entwicklungen und Perspektiven auf dem Gebiet des technischen Kohlenstoffs

New developments and outlook for technical carbon. The present world production of technical carbon amounts to 20 Mio. t/a (metallurgical coke as well as petroleum and pitch coke not included). More recent developments in the field of technical carbon are discussed in detail. Topics covered include: production and utilization of technical carbon and graphite products in metallurgy; recent advances in the use of carbon black as reinforcing material for car tyres; the significance of activated carbon for waste gas purification including the recovery of valuable materials; high-performance materials from carbon such as carbon fibres, carbon composites, and full-matrix carbons; synthesis of diamond for technical applications; preparation of diamond or diamond-like films by carbon vapor deposition; structure, preparation, and properties of fullerite, a new form of carbon, and conceivable future applications.     

The electrical conductivity of fluidized beds of coke and graphite up to 1200°

Nitrogen-fluidized beds of petroleum coke and graphite were heated by applying an a.c. voltage to electrodes submerged in the bed. Bed resistivities, calculated from the voltage and power input required to maintain a constant temperature, show a similar decrease in resistivity, for both materials, with increasing temperature up to 600°C., however, at about 600°C. the resistivity of graphite beds continues to decrease while that of coke beds goes through a minimum and then increases. This was attributed to arc formation at the contacts between coke particles when the applied voltage exceeds a critical value. Similar behavior was not observed for graphite as the operating voltage never exceeded the critical value.