关键词: 旋转填料床, 超重力, 碳酸锂, 碳酸氢锂, 二氧化碳

Abstract: Carbonation of lithium carbonate under high gravity by orthogonal method was carried out by adjusting four experimental factors, i.e. concentration, gas flow rate, frequency of rotating packed bed and the feeding rate in the rotating packed bed. The optimal condition was determined:material concentration 60 g/L, gas flow rate 0.08m³/h, the frequency of rotating packed bed 50 Hz, and the feed rate 350 mL/min. Experiments were conducted under the optimal condition, the average value of reaction time t_x is 55 min, which is about 1/3 of the traditional reactor carbonization time; the average value of c_x(Li⁺) is 9.308g/L, increased by 12.78% than the traditional reactor; and the results are highly reproducible. The experiments show that High gravity carbonation can significantly increase the mass transfer rate, shorten the reaction time, improve the utilization rate of material and gas, strengthen the reaction process, and increase the concentration of product.

Key words: rotating packed bed, high gravity, lithium carbonate, lithium bicarbonate, carbon dioxide