【摘 要】
：
In this study,the gas-liquid reactive crystallization of LiCl-NH3·H2O-CO2 was adopted to produce Li2CO3.The weakly alkaline nature of NH3·H2O in the absence o
【机 构】
：
Key Laboratory of Green Process and Engineering, National Engineering Laboratory for Hydrometallurgi
论文部分内容阅读
In this study,the gas-liquid reactive crystallization of LiCl-NH3·H2O-CO2 was adopted to produce Li2CO3.The weakly alkaline nature of NH3·H2O in the absence of any recarbonation process resulted in a unimodal and easily controllable particle size distribution (PSD) of the obtained Li2CO3.The reaction temperature significantly influenced both the Li2CO3 particle size and PSD.By increasing the temperature from 25 to 60 ℃,the volume weighted mean particle size increased from 50.5 to 100.5 μm,respectively.The Li2CO3 secondary nucleation rate and growth rate were obtained by focused beam reflectance measurements and a laser particle size analyzer,respectively.The secondary nucleation rate of Li2CO3 reduced as a function of temperature,whereas the growth rate increased.In addition to improving the surface energy of the crystals to enhance the growth process,higher temperatures also reduced the supersolubility of Li2CO3,which also plays a role to decrease the secondary nucleation rate.At a constant temperature,supersaturation affects the Li2CO3 particle size through the synergistic effect of secondary nucleation and growth.Hence,with improved supersaturation,the mean particle size of Li2CO3 decreased.The results provide a meaningful way to evaluate the crystallization process and to regulate the particle size.
其他文献
The shape of an aluminum particle is assumed to be spherical or an equivalent sphere during the combustion process.Such an assumption lacks objectivity and lead
The mixing of raw materials in a rotary drum bioreactor is important for advanced solid-state fermentation technology.However,the shape,size,and other propertie
Voids are important regions in some industrial processes,particularly in the iron-making process,because a void is a zone in which gas-solid heat transfer and r
In high-temperature gas-cooled reactors,graphite dust particles within the reactor core and the heat transfer equipment experience large temperature gradients.U
一、来源;1970年由河南省农林科学院作物所以护国为母本,河北351为父本进行有性杂交,原系号为“040”1972年引入临颍县巨陵公社试验鉴定,后经省院与临颍共同选育而成.二、产
Although the concentration of atmospheric particulate matter in Shanghai has declined in recent years,aerosols remain one of the major pollutants affecting air
In this study,spouted bed technology was applied to the protection and functionalization of polyphenolic rosemary extracts.First,solid-liquid extraction was per
Pressure fluctuations of a fluidized bed of nanoparticles were measured during the fluidization of nanoparticles with and without a magnetic field at a frequenc
Iron ore reduction is a primary unit operation in current metallurgy processes and dominates the energy consumption and greenhouse gas (GHG) emissions of the ir
Radial segregation easily occurs in a horizontal rotating drum partially filled with particles of different properties under various operational conditions.DEM