Preparation method of high-density and high-strength granular calcined coke

Abstract

A preparation method of high-density and high-strength granular calcined coke belongs to the technical field of carbon material preparation methods. According to the technical scheme, the method comprises the following steps of: crushing purchased green coke powder to a certain particle size to obtain green coke powder, and crushing asphalt with a softening point of 80-350 DEG C to a particle sizeof 1-200 microns to obtain asphalt powder; adding a certain amount of asphalt powder into the prepared green coke powder, uniformly mixing a mixture of the two kinds of powder to prepare compressed powder, and performing compression molding on the prepared compressed powder under a vacuumizing condition to obtain a green body; and putting the green body into a pot-type calcining furnace, and sintering by adopting a conventional calcining and heating process to obtain a calcined coke block. The method is simple in preparation process, low in equipment investment and low in raw material performance requirement of the green coke, sintering molding can be achieved by adding a small amount of asphalt or not adding asphalt according to the volatile matter content of the green coke, and the prepared calcined coke has the characteristics of high breaking strength, good compressive strength, low resistivity and reasonable pore distribution.

Description

technical field [0001] The invention belongs to the technical field of carbon material preparation methods, and in particular relates to a preparation method of high-density and high-strength particle calcined coke. Background technique [0002] In recent years, due to the increasing amount of fine coke in petroleum coke produced by domestic refineries, the production processes such as calcination and batching in carbon plants have been seriously affected, which in turn has a negative impact on product quality. Judging from the particle size of incoming petroleum coke, the prominent problem is that there is too much powder coke, and the fluctuation is large. Generally, the material below 1mm accounts for 20% to 30%, and the severe case reaches more than 50%. The content of powdered petroleum coke is large and fluctuates greatly, which has the following effects on the ingredients in the molding workshop: on the one hand, the purity of the medium pellets cannot be guaranteed, ...

AI Technical Summary

Problems solved by technology

Many carbon factories have used the excess fine powder in production to add asphalt to knead, form, and then roast and crush it for anode batching. However, this will undoubtedly increase production costs and is not conducive to the economic benefits of the enterprise.

There are also some researchers who conduct binderless molding or choose some low-cost and easily available materials as binders for powder coke molding to achieve the purpose of reducing production costs, improving product quality, and increasing corporate benefits, but the effect is not good. not ideal

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