Wet airflow crushing dispersion method of nanometer calcium carbonate

Abstract

The invention discloses a wet airflow crushing dispersion method of nanometer calcium carbonate. The method comprises the following steps: carrying out dry crushing on calcium carbonate ores to form powder with the fineness of 400 meshes, mixing the powder with water to prepare a slurry, adjusting the viscosity of the slurry, grinding the adjusted slurry through a wet medium stirring crusher, introducing airflow through a wet airflow crushing dispersion machine, carrying out high-speed rotating crushing dispersion, carrying out surface active treatment, drying the obtained material, and grading the dried material to obtain a fine and stable high-quality product. Airflow dispersion is introduced in the airflow crushing dispersion method of nanometer calcium carbonate, and high pressure and high speed movement of particles forms high impact intensity and shearing stress in a specially produced crushing chamber, so liquid drops are atomized, particles are broken, the fineness of the further crushed particles reaches nanometer level, crushing and dispersion are simultaneously carried out, and the effects are substantial.

Description

technical field [0001] The invention relates to the technical field of a method for pulverizing and dispersing nano calcium carbonate, in particular to a method for wet airflow pulverizing and dispersing nano calcium carbonate. Background technique [0002] At present, ultrafine powder materials have been widely used in plastics, silicone glue, ink, insulating materials for electronic components, sealing materials and other fields. Among them, particle crushing technology and dispersion technology are very important engineering technologies. In the calcium carbonate industry, ore with high purity calcium carbonate content is widely used in various industries after repeated crushing and grinding. However, the development of grinding calcium carbonate is seriously restricted because the fineness after grinding cannot be further improved. In the calcium carbonate grinding method, there are two methods: dry method and wet method. The wet method mainly includes medium stirring a...

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Problems solved by technology

In the calcium carbonate grinding method, there are two methods: dry method and wet method. The wet method mainly includes medium stirring and crushing technology, which has certain limitations in the fineness of particle grinding, and the dispersion effect is not ideal.

And the fineness of the wet method is much finer than that of the dry method, which can reach below 2 microns, but the smaller the particles, the easier it is to agglomerate, and such a fineness still cannot meet the needs of the application, and it cannot solve the problem of the large bulk density of the ground calcium carbonate. The problem

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