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Direct Conversion of Celestite to SrCO_3 by Wet Milling

机译：通过湿磨将天青石直接转化为SrCO_3

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Effect of the high energy ball milling on the direct conversion of celestite to strontium carbonate (SrCO_3) was studied. Celestite ore was ground by a planetary ball mill with sodium carbonate (Na_2CO_3) solution. Experimental study carried out to determine the effects of milling time (5, 10, 15, 30, 60, and 120 min) and Na_2CO_3 concentration (1, 1.25, 1.5, and 2 M) on the precipitation efficiency. Volume of carbonate solution was calculated for the stoichiometric amount of sulfate in celestite and solid material/ball weight ratio is selected 1/10 as constant. After filtering, washing and drying the precipitated SrCO_3 sludge was analyzed by X-Ray Diffractometer (XRD), Scanning Electron Microscope (SEM), and Energy Dispersive Spectroscopy (EDS). The conversion rate of celestite to SrCO_3 increased systematically with extending milling time. The strontium carbonate in the product can be concentrated up to 99.8% by 120 min wet milling of celestite in 2 M Na_2CO_3 solution.
机译：研究了高能球磨对天青石直接转化为碳酸锶（SrCO_3）的影响。通过行星式球磨机用碳酸钠（Na_2CO_3）溶液研磨天青石矿石。进行实验研究以确定研磨时间（5、10、15、30、60和120分钟）和Na_2CO_3浓度（1、1.25、1.5和2 M）对沉淀效率的影响。计算天青石中硫酸盐的化学计量量的碳酸盐溶液的体积，并将固体物质/球的重量比选择为常数的1/10。过滤，洗涤和干燥后，通过X射线衍射仪（XRD），扫描电子显微镜（SEM）和能量分散光谱（EDS）分析沉淀的SrCO_3污泥。随着磨粉时间的延长，天青石向SrCO_3的转化率有系统地提高。通过将天青石在2 M Na_2CO_3溶液中湿磨120分钟，可以将产品中的碳酸锶​​浓缩至99.8％。

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