Production process for preparing nanometer coal powder by using puffing and mechanical crushing

Abstract

The present invention provides a production process for preparing nanometer coal powder by using puffing and mechanical crushing. The production process comprises: carrying out a low temperature puffing treatment on selected coal particles under gas protection, crushing through a ball mill, carrying out jet mill crushing while carrying out chemical treatments such as alkali washing, acid washing, water washing and solvent extraction on the coal particles, and finally adopting a high energy nanometer impact mill to prepare the required coal nanometer particles. Compared with the production process in the prior art, the production process of the present invention has the following characteristics that: puffing and mechanical crushing are combined during the nanometer coal powder production process while the coal particle chemical treatments are performed during crushing, such that the prepared coal particles are fine, energy consumption during the production process is reduced, and the prepared nanometer coal powder has wide uses, can be used for compounding a novel fuel base material, can be separately adopted as a fuel or a fuel additive, can be adopted to replace carbon black products, and can further be separately adopted as a chemical industry intermediate.

Description

technical field [0001] The invention relates to a production process of nano-coal powder, in particular to a production process for preparing nano-coal powder by puffing and mechanical crushing, and belongs to the field of chemical industry. Background technique [0002] Coal is a natural organic mineral rock. In my country, coal reserves account for about 90% of the total petrochemical energy reserves, while the total reserves of oil and natural gas only account for 10%. Therefore, the utilization of coal is particularly important. Nanopowder, because of its extremely small size, the electronic structure and crystal structure of the surface are different from conventional particles. Therefore, it has properties that conventional particles and macroscopic objects do not have, such as surface effect, small size effect and macroscopic quantum tunneling effect, and exhibits a series of novel electrical, magnetic, optical, chemical and mechanical properties. Nanopowders have bee...

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Problems solved by technology

[0003] At present, the production of nano-coal powder is mainly through ball mill pulverization and mechanical pulverization. In mechanical pulverization, jet mill is usually used for pulverization. The pulverization efficiency is not high, the energy consumption of the pulverization process is very large, and the pulverized coal particles obtained are too large to meet the production requirements. need