Comparison of Vacuum Distilled and Modified Pitch闪蒸沥青与改制沥青的比较.ppt

* Koppers Inc. Comparison of Vacuum Distilled and Modified Pitch闪蒸沥青与改质沥青的比较 ] Coal Tar Pitch – Critical Issues of Quality and Supply July 22, 2008 Two Processes for Coal Tar Pitch Manufacturing 煤沥青生产的两种工艺 Vacuum Flash Distilled 真空闪蒸 Distill crude tar to soft pitch 焦油蒸馏得到中温沥青 Vacuum flash distill soft pitch to desired softening point using temperature of 325°C with residence time of 5 minutes 通过325摄氏度的温度持续5分钟真空闪蒸的方法得到所需软化点的高温沥青 Modified Pitch 改质沥青 Distill crude tar to soft pitch 焦油蒸馏得到中温沥青 Heat treat soft pitch to desired softening point using temperature of 405°C with residence time of 7 hours 通过405摄氏度的温度持续7小时的热处理方法得到所需软化点的改质沥青 Properties of Two Types of Pitch两种类型沥青的品质 Property 品质 Modified Pitch 改质沥青 (Heat Treated) (Heat Soaked) Vacuum Flashed Pitch 真空闪蒸沥青 Softening Point, °C 软化点 113.2 109.5 Toluene Insolubles, wt.%甲苯不溶物 31.7 22.1 Quinoline Insolubles, wt.%喹啉不溶物 9.3 5.6 Conradson Coking Value, wt.%结焦值 55.8 51.9 Mesophase, vol.%中间相 6.2 0.0 Influences of Mesophase中间相的影响 Mesophase spheres remain solid at temperatures up to 300oC 中间相小球在300摄氏度之前仍为固体 Presence of mesophase increases pitch viscosity resulting in inefficient mixing of pitch and coke yielding low green densities 中间相的存在增加了沥青粘度，使沥青与石油焦混捏后的生阳极密度较低 Mesophase spheres break during mixing and coat the aggregate, producing an adverse effect on strength and reactivity of the baked anode 中间相在混捏过程中破碎并覆盖在焦炭表面，给预焙阳极的强度和反应性带来负面影响 Mesophase spheres inhibit coke wetting by the pitch 中间相小球不利于沥青浸润石油焦 Modified Pitch Anode Study使用改质沥青生产的阳极分析 Basic Anode Forming Conditions阳极成型的基本条件 Anode Forming Temperature - 150 °C 阳极成型温度- 150 °C Laboratory Mixing Time - 20-25 minutes 实验室混捏时间- 20-25 分钟 Vibrating Time – 65 seconds 振动时间-65秒钟 Lab Baking Range – 1080-1110°C 实验室焙烧温度范围– 1080-1110°C Anode Coke Formulation阳极中石油焦配比 Coarse粗料 31.5% Fine 粉料 37.0% Intermediate 中颗粒14.6% Butts 残极 16.9% Laboratory Baking Profile实验室焙烧程序 0-600°C at 10°C per hour 0-600°C 范围内以每小时10°C升温 600- 1175°C at 25°C per hour 600- 1175°C范围内以每小