Production process method of needle coke

Abstract

The present invention provides a needle coke production process method, which comprises: carrying out post-treatment on the formed needle coke, allowing the needle coke to pass through a grinding structure under the flowing condition, forming powdery needle coke under the action of the grinding structure, adding an adsorbent, allowing the adsorbent and the powdery needle coke to flow downstream in a mixing manner, and meanwhile, supplying water flow to the powdery needle coke for flushing, so that the water flow takes away adsorbed impurities. By adding the adsorbent, metal impurities or other types of impurities in the needle coke can be removed, so that the needle coke is subjected to rapid and batch post-treatment, and the quality of the needle coke is controlled. Moreover, the needle coke can be ground, so that the needle coke can be better applied to a later product, the grinding step is omitted, the purpose of removing impurities is achieved by adding an adsorbent in the grinding step, and the impurity removal and grinding steps are combined into one, so that the working efficiency is improved.

Description

technical field [0001] The invention relates to a production process method of needle coke. Background technique [0002] Needle coke, also known as high-quality coke, is mainly used in HP and UHP graphite electrodes, lithium batteries and special carbon materials in electric furnace steelmaking. The coke formation mechanism of needle coke basically includes the following steps: birth and growth, meeting and fusion, thickening and aging and directional solidification. [0003] Among the basic raw materials used in needle coke, catalytic cracking oil slurry is used the most. After pretreatment and heat treatment of this oil slurry, the distilled fraction can be segmented, and the fraction in the middle section can be normalized. Set and form needle coke. [0004] In order to achieve good quality control, needle coke generally needs to select excellent oil slurry for reaction, and the fractionation range of the selected needle coke is very narrow, and the requirements for th...

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Problems solved by technology

[0004] In order to achieve good quality control, needle coke generally needs to select excellent oil slurry for reaction, and the fractionation range of the selected needle coke is very narrow, and the requirements for the process are also very strict. However, if it is fully implemented according to this standard, It is bound to cause a substantial increase in cost, which makes it difficult to realize the production of large quantities of needle coke

As for the ordinary needle coke process, on the one hand, the metal impurities contained in the composition of the needle coke materials are generally high, so the application in some occasions is limited; on the other hand, This kind of needle coke needs to be formed into a powder material when used in some occasions, so that it can be used in specific applications, which requires an additional process step, which increases the production cost of the enterprise

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