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A platform for research: civil engineering, architecture and urbanism
Method for preparing II-type anhydrous gypsum and building gypsum from phosphogypsum
The invention belongs to the technical field of comprehensive utilization of ardealite, and discloses a method for preparing II-type anhydrous gypsum and building gypsum from ardealite. The method for preparing type II anhydrous gypsum and building gypsum from ardealite comprises the following steps: mixing ardealite with water to obtain slurry, and screening to obtain oversize coarse gypsum and undersize fine gypsum slurry; settling and thickening the undersize fine gypsum slurry to obtain supernate and first gypsum slurry; mixing the oversize coarse gypsum with a sulfuric acid solution, and carrying out crystal transformation to obtain coarse II-type anhydrous gypsum and an acid solution; performing reverse flotation on the coarse II-type anhydrite to obtain II-type anhydrite, flotation return water and first organic slag liquid; and mixing the first organic slag liquid and the first gypsum slurry, and carrying out reverse flotation to obtain organic slag, building gypsum and flotation return water. The II-type anhydrous gypsum, the building gypsum and the organic slag are produced through particle size grading, wet crystal transformation and flotation purification methods, wherein the II-type anhydrous gypsum is a good filler raw material; the building gypsum is suitable for most building occasions.
本发明属于磷石膏综合利用技术领域，公开了一种磷石膏制备Ⅱ型无水石膏及建筑石膏的方法。该磷石膏制备Ⅱ型无水石膏及建筑石膏的方法，包括以下步骤：磷石膏与水混合得到料浆，进行筛分得到筛上粗石膏和筛下细石膏浆；筛下细石膏浆经沉降浓密得到上清液和第一石膏浆；将筛上粗石膏与硫酸溶液混合经转晶得到粗Ⅱ型无水石膏和酸液；将粗Ⅱ型无水石膏进行反浮选得到Ⅱ型无水石膏、浮选回水和第一有机渣液；将第一有机渣液、第一石膏浆混合，进行反浮选得到有机渣、建筑石膏和浮选回水。本发明通过粒径分级、湿法转晶、浮选提纯方法生产出Ⅱ型无水石膏、建筑石膏和有机渣，其中Ⅱ型无水石膏是一种良好的填料原料；建筑石膏适用于大部分建筑场合。
Method for preparing II-type anhydrous gypsum and building gypsum from phosphogypsum
The invention belongs to the technical field of comprehensive utilization of ardealite, and discloses a method for preparing II-type anhydrous gypsum and building gypsum from ardealite. The method for preparing type II anhydrous gypsum and building gypsum from ardealite comprises the following steps: mixing ardealite with water to obtain slurry, and screening to obtain oversize coarse gypsum and undersize fine gypsum slurry; settling and thickening the undersize fine gypsum slurry to obtain supernate and first gypsum slurry; mixing the oversize coarse gypsum with a sulfuric acid solution, and carrying out crystal transformation to obtain coarse II-type anhydrous gypsum and an acid solution; performing reverse flotation on the coarse II-type anhydrite to obtain II-type anhydrite, flotation return water and first organic slag liquid; and mixing the first organic slag liquid and the first gypsum slurry, and carrying out reverse flotation to obtain organic slag, building gypsum and flotation return water. The II-type anhydrous gypsum, the building gypsum and the organic slag are produced through particle size grading, wet crystal transformation and flotation purification methods, wherein the II-type anhydrous gypsum is a good filler raw material; the building gypsum is suitable for most building occasions.
本发明属于磷石膏综合利用技术领域，公开了一种磷石膏制备Ⅱ型无水石膏及建筑石膏的方法。该磷石膏制备Ⅱ型无水石膏及建筑石膏的方法，包括以下步骤：磷石膏与水混合得到料浆，进行筛分得到筛上粗石膏和筛下细石膏浆；筛下细石膏浆经沉降浓密得到上清液和第一石膏浆；将筛上粗石膏与硫酸溶液混合经转晶得到粗Ⅱ型无水石膏和酸液；将粗Ⅱ型无水石膏进行反浮选得到Ⅱ型无水石膏、浮选回水和第一有机渣液；将第一有机渣液、第一石膏浆混合，进行反浮选得到有机渣、建筑石膏和浮选回水。本发明通过粒径分级、湿法转晶、浮选提纯方法生产出Ⅱ型无水石膏、建筑石膏和有机渣，其中Ⅱ型无水石膏是一种良好的填料原料；建筑石膏适用于大部分建筑场合。
Method for preparing II-type anhydrous gypsum and building gypsum from phosphogypsum
一种磷石膏制备Ⅱ型无水石膏及建筑石膏的方法
PAN YI (author) / RONG XICAI (author) / PAN ZHIQUAN (author) / YANG MAN (author) / CHEN XIAOQING (author)
2024-04-16
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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