A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Method for producing high-quality building gypsum through in-situ deep purification of phosphogypsum
The invention discloses a method for producing high-quality building gypsum through in-situ deep purification of ardealite, and relates to the technical field of building gypsum. Carrying out in-situ deep purification treatment on the wet-process phosphoric acid byproduct phosphogypsum through re-pulping recrystallization; the phosphogypsum subjected to in-situ deep purification treatment is directly conveyed to a gypsum pneumatic drying process, and free water is rapidly removed in a direct contact manner by taking natural gas as a heat source and utilizing a hammer type drying device; the dried hot material is conveyed to a shell-and-tube steam-solid dehydrator for dehydration, hot air heated by sulfuric acid waste heat in a tube pass indirectly exchanges heat with ardealite in a shell pass, and 1.5 crystal water in the ardealite is uniformly removed; gypsum obtained through dehydration enters a cooler, solid obtained after cooling is ground and then enters a gypsum decomposition procedure, and high-quality stable phosphorus building gypsum is prepared through recycling and sieving without aging treatment.
本发明公开了一种磷石膏原位深度净化生产高品质建筑石膏的方法，涉及建筑石膏技术领域。将湿法磷酸副产磷石膏经再浆重结晶进行原位深度净化处理；经原位深度净化处理的磷石膏直接输送至石膏气流干燥工序，以天然气为热源，利用锤式干燥装置，直接接触式快速脱除游离水；干燥后的热物料输送至管壳式汽固脱水器进行脱水，管程内利用硫酸余热加热的热空气与壳程中磷石膏间接换热，均匀脱除磷石膏中的1.5个结晶水；脱水得到的石膏进入冷却器，冷却后固体经研磨后进入石膏分解工序，经回收、过筛，无需陈化处理，制备得到高品质稳定磷建筑石膏。
Method for producing high-quality building gypsum through in-situ deep purification of phosphogypsum
The invention discloses a method for producing high-quality building gypsum through in-situ deep purification of ardealite, and relates to the technical field of building gypsum. Carrying out in-situ deep purification treatment on the wet-process phosphoric acid byproduct phosphogypsum through re-pulping recrystallization; the phosphogypsum subjected to in-situ deep purification treatment is directly conveyed to a gypsum pneumatic drying process, and free water is rapidly removed in a direct contact manner by taking natural gas as a heat source and utilizing a hammer type drying device; the dried hot material is conveyed to a shell-and-tube steam-solid dehydrator for dehydration, hot air heated by sulfuric acid waste heat in a tube pass indirectly exchanges heat with ardealite in a shell pass, and 1.5 crystal water in the ardealite is uniformly removed; gypsum obtained through dehydration enters a cooler, solid obtained after cooling is ground and then enters a gypsum decomposition procedure, and high-quality stable phosphorus building gypsum is prepared through recycling and sieving without aging treatment.
本发明公开了一种磷石膏原位深度净化生产高品质建筑石膏的方法，涉及建筑石膏技术领域。将湿法磷酸副产磷石膏经再浆重结晶进行原位深度净化处理；经原位深度净化处理的磷石膏直接输送至石膏气流干燥工序，以天然气为热源，利用锤式干燥装置，直接接触式快速脱除游离水；干燥后的热物料输送至管壳式汽固脱水器进行脱水，管程内利用硫酸余热加热的热空气与壳程中磷石膏间接换热，均匀脱除磷石膏中的1.5个结晶水；脱水得到的石膏进入冷却器，冷却后固体经研磨后进入石膏分解工序，经回收、过筛，无需陈化处理，制备得到高品质稳定磷建筑石膏。
Method for producing high-quality building gypsum through in-situ deep purification of phosphogypsum
一种磷石膏原位深度净化生产高品质建筑石膏的方法
HE BINBIN (author) / ZHU GUIHUA (author) / ZHOU QIONGBO (author) / MEI YI (author) / JIANG WEI (author) / YANG WENJUAN (author) / GONG LI (author) / YANG JUN (author) / XIE DELONG (author) / ZHU YUAN (author)
2022-10-14
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
Method for preparing high-quality building gypsum by utilizing phosphogypsum
| European Patent Office | 2021
High-strength phosphogypsum-based building gypsum product
| European Patent Office | 2020
Method for producing gypsum block by utilizing phosphogypsum
| European Patent Office | 2024
| European Patent Office | 2024