【摘要】：采用連續(xù)流動(dòng)浸提的方法,研究了酒石酸和草酸對(duì)不同含鉀礦物(黑云母、白云母和微斜長石)鉀釋放及動(dòng)力學(xué)模型的影響。結(jié)果表明:酒石酸連續(xù)流動(dòng)浸提條件下,黑云母、白云母和微斜長石的釋鉀量分別是對(duì)照處理(去離子水)各礦物釋鉀量的2.2、3.3和2.6倍;草酸浸提條件下,黑云母、白云母和微斜長石的釋鉀量分別是對(duì)照處理的2.7、4.5和10.1倍;不同溶液連續(xù)流動(dòng)浸提條件下,各礦物的釋鉀量均表現(xiàn)為黑云母㧐白云母㧐微斜長石;分別采用拋物線擴(kuò)散模型、雙常數(shù)模型、Elovich模型和一級(jí)動(dòng)力學(xué)模型對(duì)不同礦物中鉀的釋放量進(jìn)行方程擬合,結(jié)果表明,4種模型模擬條件下黑云母、白云母的鉀釋放動(dòng)力學(xué)方程均達(dá)到了極顯著的水平,決定系數(shù)R2介于0.591~0.999;一級(jí)動(dòng)力學(xué)模型模擬下微斜長石鉀釋放的動(dòng)力學(xué)方程達(dá)到了極顯著水平。連續(xù)流動(dòng)條件下,低分子量有機(jī)酸可顯著提高不同含鉀礦物的鉀素釋放量。
[Abstract]:The effects of tartaric acid and oxalic acid on potassium release and kinetic models of different potassium minerals (biotite Muscovite and microplagioclase) were studied by continuous flow extraction. The results showed that under the condition of tartaric acid continuous flow extraction, the potassium release of biotite, Muscovite and microplagioclase was 2.2, 3.3 and 2.6 times higher than that of the control (deionized water), respectively, and the potassium release of biomica, Muscovite and microplagioclase was 2.7, 4.5 and 10.1 times of that of the control, respectively, under the condition of oxalic acid extraction, and the potassium release of biomica, Muscovite and microplagioclase was 2.7, 4.5 and 10.1 times higher than that of the control treatment, respectively. Under the condition of continuous flow extraction of different solutions, the potassium release amount of each mineral is biomica? Muscovite? Parabola diffusion model, double constant model, Elovich model and first order kinetic model were used to fit the potassium release from different minerals by parabola diffusion model, double constant model, Elovich model and first order kinetic model, respectively. the results showed that the potassium release kinetics equations of biomica and Muscovite reached a very significant level under the four models, and the determination coefficient R2 was 0.591 鈮，

本文編號(hào)：2500668