Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Method for removing impurities and whitening phosphogypsum
The invention discloses a method for removing impurities and whitening phosphogypsum. The method comprises the following steps: (1) carrying out fineness rough machining on a phosphogypsum raw material; (2) carrying out acid leaching on the phosphogypsum obtained in the step (1) by using sulfuric acid, performing heating and keeping the temperature constant to obtain a material; (3) adding a flotation agent into the material obtained in the step (2), and carrying out flotation concentration separation; (4) feeding the slurry subjected to flotation separation obtained in the step (3) into gravity separation operation for impurity removal to obtain concentrate; and (5) filtering the concentrate obtained in the step (4), washing a filter cake, and drying and crushing the filter cake to obtainthe finished product purified gypsum. According to the method, high-whiteness and high-purity anhydrous calcium sulfate is prepared from phosphogypsum by utilizing a flotation/extraction/gravity separation process in a weakly acidic environment.
本发明公开一种磷石膏除杂增白的方法，包括以下步骤：1)将磷石膏原料进行细度粗加工；2)将步骤1)所得磷石膏用硫酸进行酸浸，并加热、恒温，获得物料；3)将步骤2)获得的物料加入浮选剂，进行浮选精选分离；4)将步骤3)获得的浮选分离后浆料送入重选作业进行除杂，得到精矿；5)将步骤4)获得的精矿进行过滤，滤饼洗涤后，干燥，破碎，得到成品净化石膏。本发明在弱酸性环境下利用浮选/萃取/重选工艺由磷石膏制取高白度、高纯度无水硫酸钙的方法。
Method for removing impurities and whitening phosphogypsum
The invention discloses a method for removing impurities and whitening phosphogypsum. The method comprises the following steps: (1) carrying out fineness rough machining on a phosphogypsum raw material; (2) carrying out acid leaching on the phosphogypsum obtained in the step (1) by using sulfuric acid, performing heating and keeping the temperature constant to obtain a material; (3) adding a flotation agent into the material obtained in the step (2), and carrying out flotation concentration separation; (4) feeding the slurry subjected to flotation separation obtained in the step (3) into gravity separation operation for impurity removal to obtain concentrate; and (5) filtering the concentrate obtained in the step (4), washing a filter cake, and drying and crushing the filter cake to obtainthe finished product purified gypsum. According to the method, high-whiteness and high-purity anhydrous calcium sulfate is prepared from phosphogypsum by utilizing a flotation/extraction/gravity separation process in a weakly acidic environment.
本发明公开一种磷石膏除杂增白的方法，包括以下步骤：1)将磷石膏原料进行细度粗加工；2)将步骤1)所得磷石膏用硫酸进行酸浸，并加热、恒温，获得物料；3)将步骤2)获得的物料加入浮选剂，进行浮选精选分离；4)将步骤3)获得的浮选分离后浆料送入重选作业进行除杂，得到精矿；5)将步骤4)获得的精矿进行过滤，滤饼洗涤后，干燥，破碎，得到成品净化石膏。本发明在弱酸性环境下利用浮选/萃取/重选工艺由磷石膏制取高白度、高纯度无水硫酸钙的方法。
Method for removing impurities and whitening phosphogypsum
一种磷石膏除杂增白的方法
LI SONGGENG (Autor:in) / FAN CHUIGANG (Autor:in) / ZHANG MINGWU (Autor:in) / LIU RUNGUO (Autor:in)
19.06.2020
Patent
Elektronische Ressource
Chinesisch
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