A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Semi-hydrated phosphogypsum whitening method
The invention relates to the technical field of ardealite resource utilization, in particular to a semi-hydrated ardealite whitening method. The invention provides a semi-hydrated ardealite whitening method, which comprises the following steps: uniformly mixing ardealite original slag powder with a cosolvent (ammonium bifluoride, barium chloride, ammonium chloride and boric acid), calcining at 120-160 DEG C, cooling to obtain ardealite with high whiteness, and reacting ions with the cosolvent to avoid generation of other compounds. The whiteness of the phosphogypsum is effectively improved, and meanwhile, the phosphogypsum is dehydrated in the calcining process, so that the whitened semi-hydrated gypsum is obtained. The method is simple and easy to implement, the amount of the needed cosolvent is small, the whiteness effect of the phosphogypsum is remarkable, the whiteness is improved from about 46.7% to 90% or above, and the content of semi-hydrated phosphogypsum is 90% or above. The semi-hydrated phosphogypsum is short in setting and hardening time and relatively high in strength, can be used for handicrafts, architectural costumes, interior and exterior decoration of buildings and the like, and has a wide application prospect.
本发明涉及磷石膏资源化利用技术领域，具体是一种半水磷石膏增白方法。本申请提供了一种半水磷石膏增白方法，将磷石膏原渣粉与助溶剂(氟化氢铵、氯化钡、氯化铵、硼酸)混合均匀后在120～160℃下进行煅烧，冷却过后得到白度较高的磷石膏，其中的离子与助溶剂发生反应，避免其生成其他的复合物，有效的提升了磷石膏的白度，同时，煅烧过程中磷石膏进行脱水，得到了增白的半水石膏。本申请的方法简单易行，所需助溶剂量为较少，磷石膏白度效果显著，白度从46.7％左右提升到了90％以上，半水磷石膏含量在90％以上。得到半水磷石膏，凝结硬化时间短，强度较高，可用于手工艺品、建筑服饰和建筑内外装饰等方面，具有广泛的应用前景。
Semi-hydrated phosphogypsum whitening method
The invention relates to the technical field of ardealite resource utilization, in particular to a semi-hydrated ardealite whitening method. The invention provides a semi-hydrated ardealite whitening method, which comprises the following steps: uniformly mixing ardealite original slag powder with a cosolvent (ammonium bifluoride, barium chloride, ammonium chloride and boric acid), calcining at 120-160 DEG C, cooling to obtain ardealite with high whiteness, and reacting ions with the cosolvent to avoid generation of other compounds. The whiteness of the phosphogypsum is effectively improved, and meanwhile, the phosphogypsum is dehydrated in the calcining process, so that the whitened semi-hydrated gypsum is obtained. The method is simple and easy to implement, the amount of the needed cosolvent is small, the whiteness effect of the phosphogypsum is remarkable, the whiteness is improved from about 46.7% to 90% or above, and the content of semi-hydrated phosphogypsum is 90% or above. The semi-hydrated phosphogypsum is short in setting and hardening time and relatively high in strength, can be used for handicrafts, architectural costumes, interior and exterior decoration of buildings and the like, and has a wide application prospect.
本发明涉及磷石膏资源化利用技术领域，具体是一种半水磷石膏增白方法。本申请提供了一种半水磷石膏增白方法，将磷石膏原渣粉与助溶剂(氟化氢铵、氯化钡、氯化铵、硼酸)混合均匀后在120～160℃下进行煅烧，冷却过后得到白度较高的磷石膏，其中的离子与助溶剂发生反应，避免其生成其他的复合物，有效的提升了磷石膏的白度，同时，煅烧过程中磷石膏进行脱水，得到了增白的半水石膏。本申请的方法简单易行，所需助溶剂量为较少，磷石膏白度效果显著，白度从46.7％左右提升到了90％以上，半水磷石膏含量在90％以上。得到半水磷石膏，凝结硬化时间短，强度较高，可用于手工艺品、建筑服饰和建筑内外装饰等方面，具有广泛的应用前景。
Semi-hydrated phosphogypsum whitening method
一种半水磷石膏增白方法
ZHANG JIE (author) / WEI CHAO (author) / ZHAO CHONG (author) / RAN JINGYU (author) / SU XIANGDONG (author)
2024-10-29
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
Whitening method and production process of phosphogypsum
| European Patent Office | 2023
Method for removing impurities and whitening phosphogypsum
| European Patent Office | 2020
Method for preparing alpha-semi-hydrated gypsum from phosphogypsum and product
| European Patent Office | 2023
Preparation method of harmless semi-hydrated phosphogypsum road base stabilizing material
| European Patent Office | 2023
| European Patent Office | 2024