Crushing and classifying method for light calcium carbonate

Abstract

The crushing and classifying process for light calcium carbonate includes crushing dry calcium carbonate into crusher; conveying crushed calcium carbonate with blower and pipeline to classifying machine; classifying the crushed calcium carbonate material via centrifugal force airflow produces to make calcium carbonate material meeting the fineness requirement enter the powder collecting system from the top of the classifying machine and make coarse material return to crushing; and returning the airflow from the powder collecting system and with calcium carbonate powder eliminated to the entrance of the blower; and other steps. The said process has low cost, improved work environment, no environmental pollution and lower labor strength.

Description

technical field [0001] The invention relates to a method for pulverizing and classifying light calcium carbonate. Background technique [0002] At present, nano-scale light calcium carbonate is widely used as a filler in the fields of plastics and rubber. Because the application of this calcium carbonate in the above-mentioned fields must reach a certain fineness, and the calcium carbonate obtained after drying is granular, so in order to obtain calcium carbonate that meets the fineness requirements, it is necessary to pulverize the calcium carbonate and carry out sorting. The current crushing and sorting method is generally to use a pulverizer to crush the calcium carbonate first, and then transfer the calcium carbonate to the classifier for sorting by manpower or other mechanical equipment, and the materials that meet the fineness requirements are transported to the collection system The materials that do not meet the fineness requirements are collected and returned to t...

AI Technical Summary

Problems solved by technology

Since the crushing and grading use two operating systems separated from each other, the material transportation between the two is carried out in an open environment, which requires manpower to be transferred by other mechanical equipment, thus increasing the labor intensity and complicating the operation; and this kind of The classification method must adopt an open circuit system, that is, the airflow after collecting the material must be emptied, because the airflow from the collection system contains a certain amount of calcium carbonate material, and at the same time, the dry calcium carbonate powder is easy to float during the transfer process, which will cause damage to the airflow. The pollution of the environment makes the working environment harsh, and at the same time causes the loss of calcium carbonate materials, which leads to an increase in production costs

Images