串接石墨化炉热处理石墨粉的方法及其石墨坩埚

本发明涉及一种串接石墨化炉热处理石墨粉的方法及其石墨坩埚,属于热处理技术领域。串接石墨化炉热处理石墨粉的方法,对石墨粉进行加热处理,其中,串接石墨化炉热处理石墨粉过程为：（1）装粉。将石墨粉装入石墨坩埚内至填满。（2）封盖。用盖子将石墨坩埚端口密封。（3）装炉。将装好石墨粉的石墨坩埚头尾相接依次放入串接石墨化炉中。（4）加热。接通电源,使坩埚温度达到2500～3500℃,保持4～10h时。     

串接石墨化炉中产品出现“麻面”的原因和解决方法

在串接石墨化炉中产品会产生"麻面",严重地会影响制品销售和使用。本文从生产实践出发,阐述产生"麻面"的原因及形成机理,并提出解决的方法。通过生产实践,最终彻底解决"麻面"问题。     

内串石墨化质量控制的探讨

提出了内串石墨化生产过程中出现的主要质量问题,并对产生的原因和控制预防措施进行了初步的分析探讨。     

串接石墨化炉装炉坯料单串和多串并联的条件

讨论了串接石墨化炉内焙烧坯料单串装炉和多串并联装炉时,坯料的直径和一些物理性质必须满足的充要条件。     

串接石墨化用保温料的控制管理

串接石墨化炉用保温料对生产成本和产品质量具有重要的影响，本文通过合理地选用保温料，定期对使用中的保温料和炉底保温料进行处理，使吨电极消耗保温料150kg左右。     

内串石墨化炉新型运行方式探讨与实践

对内串石墨化炉新型运行方式--石墨化炉送电一次送两炉进行探讨.一次送两炉分为I型炉模式、U型炉模式、移动变压器U型炉模式.通过实践得出:采用新型运行方式可提高总产量80%～100%,在产量相同情况下,项目用电负载可减少一半,因此可节约基本电费.     

石墨化过程的控制方法

严格按功率曲线供电来控制石墨化控制石墨化过程，既能保证产品质量又能降低能耗。为此，在炉子运行过程中，周期性测定一定时间间隔实际消耗的能量与曲线规定值比较，据其差值用改变供电电压来调整下一时间间隔的供电电能值，以保证按功率曲线供电。     

浅谈内串石墨化送电曲线的制定与调整

简要介绍了内串石墨化送电曲线拟定的思路和依据,结合所测温度曲线与送电工艺参数的关系和产品质量要求等,就内串石墨化送电曲线的制定与调整进行初步的分析探讨。     

内串石墨化端头调节块对端头电极质量影响的探讨

主要介绍了内串石墨化过程中端头调节块使用不当导致端头电极出现的质量问题,并对合理使用调节块提出了相应的措施.     

内串石墨化节能技术探讨

内串石墨化送电曲线一直以来是炭素工艺中被讨论的热点问题,合理的送电曲线不仅能够降低内串石墨化的送电单耗,而且能够提高石墨化产品质量,国内石墨电极生产厂家根据自身实际进行了不断的实践与摸索,使内串石墨化工艺技术日益成熟,实现了节能降耗提高产品质量的目的,创造了良好的经济效益。本文从石墨化理论入手,结合生产实践,对内串石墨化产品质量及节能技术进行探讨。     

针状焦与石墨电极

炭素材料的生产过程是一个严密受控的系统工程,生产石墨电极、特种炭材料、铝用炭素、新型高端炭材料等都离不开原料、装备、技术、管理4个生产要素和相关专有技术的结合运用。原料是决定炭素材料基本特性的关键要素,原料的性能决定了制造出的炭素材料使用性能。就UHP、HP石墨电极的生产而言,优质的针状焦是首选,还要     

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.     

Improvement and control of the quality of binder pitch for graphite electrodes

Factors influencing the coke yield and the softening point (SP) of pitches were studied to ascertain procedures for the improvement and control of their quality. The coke yield of pitches from different tar sources is expressed as a linear function of the BI content. Pitches were prepared by distillation under constant operating conditions. The coke yields of pitches, determined by thermogravimetric analysis (TGA), increased with their benzene insoluble (BI) content, which is controlled by reflux heat treatment. Softening point increased with the nitrogen content as well as BI content. Therefore, increasing the BI content and decreasing the nitrogen content increases coke yield without any change in the softening point of binder pitches for graphite electrodes.     

Effect of graphite oxide on graphitization of furan resin carbon

Graphite oxide (GO) was used to accelerate the graphitization of furan resin carbon. The effects of the GO content and the heat-treatment temperature (HTT) on the graphitization of furan resin carbon were investigated. The X-ray diffraction results indicate that the graphitization extent of furan resin carbon increases with the increase of the GO content and the HTT.     

Effect of graphitization temperature on microstructure of PAN-based high modulus graphite fibers

以日本东丽公司T800碳纤维为原料,经不同温度的连续石墨化处理得到性能不同的高模量碳纤维。利用X射线衍射（XRD）和激光拉曼光谱（Raman光谱）研究了5种自制PAN基高模量碳纤维（1^#,2^#,3^#,4^#,5^#）的微观结构。结果表明：随着石墨化温度的升高,石墨微晶尺寸L_c、L_a10、L_a110及取向度均逐渐增大,而d₀₀₂和取向角则逐渐减小。石墨化温度越高,碳纤维的石墨化程度越高,结晶度越大。