Co-production technique of needle coke, mesocarbon microbeads and high-quality asphalt

Abstract

The invention relates to a co-production technique of needle coke, mesocarbon microbeads and high-quality asphalt; heavy phase asphalt generated by raw material asphalt pre-treatment and raw material asphalt are mixed to produce mesocarbon microbeads, the byproduct asphalt of the production of misocarbon microbeads and the refined asphalt obtained by the raw material asphalt pre-treatment are mixed as a needle coke raw material; the technique comprises the steps of raw material asphalt pre-treatment, polymerization, polymerization product separating and drying, byproduct asphalt processing, coking and sintering. Compared with the prior art, the technique related by the invention has the following beneficial effects: (1) the coal tar asphalt processing degree is high, the cost is low, the varieties are diversified, the added value of the product is high, and the maximal economic benefit is realized; (2) the waste discharge is avoided during the whole production process, and the optimal environmental benefit is realized; (3) the process is flexible, the operation is simple, and the high-efficiency combination of needle coke, mesocarbon microbeads and high-quality asphalt is realized; and (4) the product index is flexible and adjustable, so as to adapt to market variations in time and improve the market risk resisting capability of an enterprise.

Description

technical field [0001] The invention relates to the technical field of coal tar pitch deep processing, in particular to a co-production process of needle coke, mesocarbon microspheres and high-quality pitch. Background technique [0002] Coal tar pitch is a bulk product separated from coal tar processing, accounting for about 50% to 60% of coal tar, and its processing and utilization level is very important to the entire coal tar processing. Coal tar pitch can be processed to obtain products with different uses, such as binders and impregnating agents used in the production of carbon materials, needle coke, mesophase carbon microspheres, carbon fibers, anti-corrosion materials, fuels, etc. These products are used in metallurgy, carbon , chemical industry, building materials and other fields play a role that cannot be ignored. However, with the development of coal chemical industry, the increasing output of coal tar pitch makes the problems in its processing and utilization ...

AI Technical Summary

Problems solved by technology

The main problems in my country's coal tar pitch processing are insufficient processing depth, single product types, and poor ability to resist market risks.

[0003] At present, the production of coal-based needle coke mainly adopts solvent extraction separation, centrifugation and other methods to purify the raw materials, separate the quinoline insoluble (QI) in the raw coal tar pitch, and obtain refined pitch with very low QI content and QI-rich The by-product asphalt is refined asphalt and then coked and calcined to obtain needle coke, but the by-product asphalt rich in QI has not been rationally and effectively utilized, but is used as low-value-added, low-quality binder asphalt and cheap external sales, and even cause a backlog of by-products

In addition, for enterprises that use coal tar pitch as raw material to produce mesophase carbon microspheres, the yield of mesophase carbon microspheres is generally 20% to 50%, and most of the rest is by-product pitch. The main characteristic of the by-product pitch is the QI content It is very low and has excellent application value, but it has not been effectively and rationally processed and utilized at present

[0004] In short, at present, the depth of coal tar pitch processing is not deep enough, and the product is single. It is one of the main factors for the low profit margin of related enterprises, and it is also one of the factors for their poor ability to resist market risks.

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