Preparation process of activated carbon

Abstract

The invention discloses a preparation process of activated carbon, belonging to the technical field of activated carbon preparation. According to the method, coal and coal tar are mixed to prepare theactivated carbon; and the coal tar slag contains a large amount of incompletely combusted carbon and a small amount of iron, silicon and trace elements. In a process of mixing the coal tar slag withthe coal and performing activation, because the coal tar slag and the coal material have different surface and internal pore diameter structures, the pore structure of an activated carbon finished product is favorably enhanced, and the specific surface area is increased. When raw materials are dried after being formed, a hot air dryer is set at 40-65 DEG C to preheat the formed raw materials, so that the raw materials can slowly absorb heat, the internal structures of the raw materials can be uniformly and fully heated, and the phenomena that the local temperature rise of the raw materials istoo fast, the internal structures of the raw materials are damaged and the quality of activated carbon finished products is influenced when the raw materials are directly heated at high temperature after being formed are avoided.

Description

technical field

[0001] The invention relates to the field of activated carbon preparation technology, in particular to an activated carbon preparation technology. Background technique

[0002] Activated carbon, activated carbon is a special treatment of carbon, organic raw materials (husks, coal, wood, etc.) are heated in the absence of air to reduce non-carbon components (this process is called carbonization), and then react with gas, The surface is eroded to produce a microporous structure (this process is called activation). Since the activation process is a microscopic process, that is, the surface erosion of a large number of molecular carbides is point-like erosion, so the surface of activated carbon has countless small pores.

[0003] The existing activated carbon preparation process uses coal powder as the main raw material, supplemented by a binder that is molded, dried, carbonized, and activated. The formed raw materials are directly heated and dried at high tempe...