Preparation method of barium carbonate and barium carbonate prepared by using same

Abstract

The invention provides a preparation method of barium carbonate. The preparation method comprises the following steps: naturally settling yellow water, and filter-pressing, to obtain the pure yellow water; adding a desulfurizing agent into the pure yellow water and pre-processing, wherein the desulfurizing agent is sodium hydroxide solution or soluble sodium salt solution, while a Na<+> concentration in reaction solution reaches 0.01 mol / L to 0.025 mol / L, stopping pre-processing, to obtain the pre-processed yellow water; enabling the pre-processed yellow water to perform a continuous convection current synthetic reaction with technology circulating water, while a pH value of reaction slurry reaches 9.5-11.5, stopping the reaction, performing continuous sedimentation curing on the reactionslurry, and performing solid-liquid separation, collecting a solid; washing and drying the collected solid, to obtain a barium carbonate product. The invention further provides the barium carbonate product prepared by using the method. The content of the barium carbonate is greater than or equal to 99.48wt%. The method is capable of, through performing decarbonization recovery on the technology circulating water, preparing the industrial barium carbonate, improving a recovery rate of the barium carbonate production to the greatest extent, reducing the generation of solid wastes, and in complywith the requirements of national resource conservation and emission reduction.

Description

technical field [0001] The invention belongs to the technical field of resource recycling. Specifically, the invention relates to a method for preparing barium carbonate by circulating process water, and the barium carbonate prepared by the preparation method. Background technique [0002] Barium carbonate is an important product in the inorganic salt industry. It is widely used in magnetic materials, PTC electronic ceramics, liquid crystal substrate glass, architectural ceramics, water purification and other basic raw materials of barium salts. The optimization of its production process has a great effect on reducing costs and reducing waste emissions. Great significance. [0003] The traditional industrial barium carbonate process mostly uses barite and anthracite as raw materials, and is produced through batching, roasting, leaching, carbonization, drying and other processes, but this production method does not recycle the process water. Part of the barium carbonate ente...

AI Technical Summary

Problems solved by technology

[0003] The traditional industrial barium carbonate process mostly uses barite and anthracite as raw materials, and is produced through batching, roasting, leaching, carbonization, drying and other processes, but this production method does not recycle the process water. Part of the barium carbonate enters the barium slag and becomes solid waste, which is not conducive to reducing costs and reducing solid waste

Images