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Non-calcium-oxide-method phosphogypsum harmless treatment process
The invention discloses a non-calcium oxide method phosphogypsum innocent treatment process which is characterized by comprising the following steps: drying raw materials: putting phosphogypsum to be treated into a drying machine for drying, and drying for 10-30 hours at 80-150 DEG C by adopting the drying machine in the drying process until the water content of the dried material is less than 5%; primary extraction: adding the dried phosphogypsum into an acidic nitrogen-containing extracting solution with the pH value of 1-3, stirring for 30 minutes, filtering, stirring for 30 minutes by adopting the acidic nitrogen-containing extracting solution with the pH value of 1-3 in the extraction process, filtering, taking out a solid, and circulating for 5 times. According to the phosphogypsum harmless treatment process based on the non-calcium oxide method, excessive water-soluble and overflowable phosphorus elements and fluorine elements in phosphogypsum can be effectively removed, the phosphogypsum is fundamentally purified, harmless conversion of the phosphogypsum is achieved, the storage risk of the phosphogypsum can be reduced, and conversion from hazardous waste to common solid waste is achieved.
本发明公开了一种非氧化钙法的磷石膏无害化处理工艺，其特征在于，包括如下步骤：原料烘干：将需要处理的磷石膏放入烘干机中进行烘干，烘干过程中采用烘干机在80‑150℃下烘干10‑30h，烘干过后物料含水量小于5％；初次提取：将烘干后的磷石膏加入pH为1～3的酸性含氮提取液搅拌30min过滤，提取过程中采用pH为1～3的酸性含氮提取液搅拌30min后，过滤取出固体，循环进行5次，本发明涉及资源与环境技术领域。该非氧化钙法的磷石膏无害化处理工艺，可有效的去除磷石膏中过量水溶性，可溢出的磷元素与氟元素，从根本上使磷石膏得到净化，实现其无害化的转变，并且可减小其本身存储的风险，实现危险废物到一般固废的转化。
Non-calcium-oxide-method phosphogypsum harmless treatment process
The invention discloses a non-calcium oxide method phosphogypsum innocent treatment process which is characterized by comprising the following steps: drying raw materials: putting phosphogypsum to be treated into a drying machine for drying, and drying for 10-30 hours at 80-150 DEG C by adopting the drying machine in the drying process until the water content of the dried material is less than 5%; primary extraction: adding the dried phosphogypsum into an acidic nitrogen-containing extracting solution with the pH value of 1-3, stirring for 30 minutes, filtering, stirring for 30 minutes by adopting the acidic nitrogen-containing extracting solution with the pH value of 1-3 in the extraction process, filtering, taking out a solid, and circulating for 5 times. According to the phosphogypsum harmless treatment process based on the non-calcium oxide method, excessive water-soluble and overflowable phosphorus elements and fluorine elements in phosphogypsum can be effectively removed, the phosphogypsum is fundamentally purified, harmless conversion of the phosphogypsum is achieved, the storage risk of the phosphogypsum can be reduced, and conversion from hazardous waste to common solid waste is achieved.
本发明公开了一种非氧化钙法的磷石膏无害化处理工艺，其特征在于，包括如下步骤：原料烘干：将需要处理的磷石膏放入烘干机中进行烘干，烘干过程中采用烘干机在80‑150℃下烘干10‑30h，烘干过后物料含水量小于5％；初次提取：将烘干后的磷石膏加入pH为1～3的酸性含氮提取液搅拌30min过滤，提取过程中采用pH为1～3的酸性含氮提取液搅拌30min后，过滤取出固体，循环进行5次，本发明涉及资源与环境技术领域。该非氧化钙法的磷石膏无害化处理工艺，可有效的去除磷石膏中过量水溶性，可溢出的磷元素与氟元素，从根本上使磷石膏得到净化，实现其无害化的转变，并且可减小其本身存储的风险，实现危险废物到一般固废的转化。
Non-calcium-oxide-method phosphogypsum harmless treatment process
一种非氧化钙法的磷石膏无害化处理工艺
WANG JIAQIANG (author) / ZHAO YI (author) / LENG JUNYANG (author) / BAI XIAOLI (author)
2024-08-13
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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