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A platform for research: civil engineering, architecture and urbanism
Method for preparing high-purity high-whiteness calcium sulfate from ardealite
The invention provides a method for preparing high-purity high-whiteness calcium sulfate from ardealite. The method comprises the following steps: mixing alkali, a first interfacial agent and water to obtain a first dispersing agent; mixing and stirring ardealite and water to obtain ardealite slurry; mixing and stirring a first dispersing agent and the phosphogypsum slurry to obtain initial slurry; aging the initial slurry, stirring, and feeding into a first-stage chute for gravity separation to obtain a first-stage impurity-removed product and first-stage slag slurry; mixing an acid, a second surfactant and water to obtain a second dispersant; mixing and stirring the primary impurity removal product and water to obtain primary impurity removal product slurry; mixing and stirring a second dispersing agent and the primary impurity removal product slurry to obtain secondary slurry; and aging the second-stage slurry, stirring, and feeding into a second-stage chute for gravity separation to obtain calcium sulfate and second-stage slag slurry. The method has the advantages of simple process, low cost and high impurity separation efficiency, and can realize comprehensive deep impurity removal of phosphogypsum.
本发明提出了一种磷石膏制备高纯高白硫酸钙的方法。该方法包括：将碱、第一界面活性剂和水混合，以便得到第一分散剂；将磷石膏和水混合搅拌，以便得到磷石膏浆液；将第一分散剂和磷石膏浆液混合搅拌，以便得到初始浆液；将初始浆液陈化后搅拌，再送入一级溜槽进行重力分离，以便得到一级除杂产物和一级渣浆；将酸、第二界面活性剂和水混合，以便得到第二分散剂；将一级除杂产物和水混合搅拌，以便得到一级除杂产物浆液；将第二分散剂和一级除杂产物浆液混合搅拌，以便得到二级浆液；将二级浆液陈化后搅拌，再送入二级溜槽进行重力分离，以便得到硫酸钙和二级渣浆。该方法工艺简单，成本低，杂质分离效率高，可以实现磷石膏全面深度除杂。
Method for preparing high-purity high-whiteness calcium sulfate from ardealite
The invention provides a method for preparing high-purity high-whiteness calcium sulfate from ardealite. The method comprises the following steps: mixing alkali, a first interfacial agent and water to obtain a first dispersing agent; mixing and stirring ardealite and water to obtain ardealite slurry; mixing and stirring a first dispersing agent and the phosphogypsum slurry to obtain initial slurry; aging the initial slurry, stirring, and feeding into a first-stage chute for gravity separation to obtain a first-stage impurity-removed product and first-stage slag slurry; mixing an acid, a second surfactant and water to obtain a second dispersant; mixing and stirring the primary impurity removal product and water to obtain primary impurity removal product slurry; mixing and stirring a second dispersing agent and the primary impurity removal product slurry to obtain secondary slurry; and aging the second-stage slurry, stirring, and feeding into a second-stage chute for gravity separation to obtain calcium sulfate and second-stage slag slurry. The method has the advantages of simple process, low cost and high impurity separation efficiency, and can realize comprehensive deep impurity removal of phosphogypsum.
本发明提出了一种磷石膏制备高纯高白硫酸钙的方法。该方法包括：将碱、第一界面活性剂和水混合，以便得到第一分散剂；将磷石膏和水混合搅拌，以便得到磷石膏浆液；将第一分散剂和磷石膏浆液混合搅拌，以便得到初始浆液；将初始浆液陈化后搅拌，再送入一级溜槽进行重力分离，以便得到一级除杂产物和一级渣浆；将酸、第二界面活性剂和水混合，以便得到第二分散剂；将一级除杂产物和水混合搅拌，以便得到一级除杂产物浆液；将第二分散剂和一级除杂产物浆液混合搅拌，以便得到二级浆液；将二级浆液陈化后搅拌，再送入二级溜槽进行重力分离，以便得到硫酸钙和二级渣浆。该方法工艺简单，成本低，杂质分离效率高，可以实现磷石膏全面深度除杂。
Method for preparing high-purity high-whiteness calcium sulfate from ardealite
一种磷石膏制备高纯高白硫酸钙的方法
XIANG LAN (author) / LYU XINFENG (author)
2023-08-22
Patent
Electronic Resource
Chinese
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