Preparation of Calcium Carbonate by Calcium Carbide Residue

Abstract

the carbide can be used as of Calcium carbide residue is a kind of industrial waste produced in the preparation of acetylene gas from hydrated calcium carbide, and the main component of the calcium carbide residue is calcium hydroxide. In this paper, the production of calcium carbonate by calcium carbide residue was studied, and carbide slag and ammonium bicarbonate was the main materials. The impurity in the carbide slag was removed through the leaching reaction, and the calcium carbonate was prepared by liquid-liquid reaction. The different reaction conditions which had an influence on the grain diameter of the product in the process of leaching and carbonation reaction were also investigated. The characteristics of materials and products in the experiment were tested by XRD, SEM and laser particle size instrument. The results showed that the calcium carbide residue after appropriately treated can be used as the raw materials to prepare calcium carbonate in different particle size.