Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
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 (Autor:in) / ZHU GUIHUA (Autor:in) / ZHOU QIONGBO (Autor:in) / MEI YI (Autor:in) / JIANG WEI (Autor:in) / YANG WENJUAN (Autor:in) / GONG LI (Autor:in) / YANG JUN (Autor:in) / XIE DELONG (Autor:in) / ZHU YUAN (Autor:in)
14.10.2022
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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