Low-ash coal-based activated carbon quick activation production technology

Abstract

The invention relates to an active carbon production technology, and in particular relates to a low-ash coal-based activated carbon quick activation production technology which comprises the following steps of grinding, kneading, carbonizing, washing, acid washing and activation to obtain a finished product. Through the technology improvement, the activation time, the activation energy consumption and the ablation of carbonized material can be reduced by about 10%; meanwhile, the ash content of the finished product of active carbon can be reduced by 2-4%, and the carbon tetrachloride adsorption rate (CTC), the iodine adsorption value and the methylene blue adsorption value are increased; for an active carbon production enterprise, by only adding a trace amount of alkaline substance and nitrate, the cost per ton is only increased by *-* yuan, the energy use and product quality can be effectively reduced, and the energy saving and emission reducing effect is obvious; and the cost per ton can be reduced by about ** yuan, and the production cost can be reduced by *** thousand yuan per year for an active carbon enterprise with annual output of 10 thousand tons.

Description

technical field [0001] The invention relates to a production process of activated carbon, in particular to a rapid activation production process of low-ash coal-based activated carbon. Background technique [0002] Activated carbon is a very versatile adsorbent, catalyst and catalyst support. At present, some coal-based activated carbons with high requirements, such as activated carbon used for water purification and activated carbon used as quasi-carbon molecular sieves, must be produced using low-ash anthracite as raw material to reduce heavy metals and ash in the product. The existing activated carbon production process is: raw material washing, drying, pulverization, coal tar kneading, drying, carbonization, activation. In the activation stage, the ablation degree of the carbonized material gradually increases with the prolongation of the activation time. Due to the low reactivity of low-ash anthracite, it will take a long time for the activation of the activated carbon...

AI Technical Summary

Problems solved by technology

As a raw material for high-quality activated carbon production, Ningxia Taixi anthracite has an ash content of only about 8.54%. It is popular because of its low ash, well-developed micropores, large specific surface area, and high strength. However, activation of Taixi anthracite is difficult. A big problem in production, the traditional solution is to add a certain proportion of bituminous coal to Taixi anthracite to improve the activation efficiency, but the ash content of the product will increase after adding bituminous coal, which will affect the quality of the final product activated carbon

Images