Equipment system for synthesizing high-purity rare earth carbonate precipitant

Abstract

The invention discloses an equipment system for synthesizing a high-purity rare earth carbonate precipitator, which is characterized by comprising a carbon dioxide absorber, a gas supply pipeline for introducing carbon dioxide and an ammonia pipeline for introducing ammonia water or liquid ammonia are respectively arranged on the carbon dioxide absorber; the tail gas purification tower is provided with a pure water pipeline for introducing pure water, the pure water is sprayed and injected into the tail gas purification tower, the tail gas purification tower is provided with a circulating pipeline for liquid circulation of the tail gas purification tower, the circulating pipeline is provided with a circulating branch, and the circulating branch is communicated with an ammonia pipeline on the carbon dioxide absorber; the solution buffer tank is communicated with the carbon dioxide absorber through a solution pipeline, so that a solution in the carbon dioxide absorber is discharged into the solution buffer tank; the system optimizes the synthesis path of the high-purity ammonium carbonate solution, so that the synthesized high-purity ammonium carbonate solution has the characteristics of higher purity, small environmental pollution, high raw material utilization rate, low system failure rate and the like, and meets the environmental protection requirement.

Description

technical field [0001] The application relates to the field of equipment for synthesizing high-purity ammonium carbonate solution, in particular to an equipment system for synthesizing a high-purity rare earth carbonate precipitant. Background technique [0002] my country is a major producer and exporter of rare earths, mainly using rare earth oxides and rare earth carbonates as rare earth products. Since rare earth carbonate is the most widely used intermediate or precursor connecting rare earth functional materials and extraction and separation, rare earth carbonate is sometimes used as an intermediate product for burning rare earth oxide, and the proportion of rare earth carbonate as an intermediate product or end product is increasing. Large, because sodium bicarbonate and sodium carbonate are expensive as rare earth precipitants, and industrial grade ammonium bicarbonate is cheap. Therefore, industrial ammonium bicarbonate is generally used as rare earth precipitants i...

AI Technical Summary

Problems solved by technology

Add a buffer to the rare earth chloride solution, and then add alkali and carbon dioxide to form a rare earth carbonate precipitate. This method requires strict control of the pH of the solution, so the addition of a buffer increases production costs.

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