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A platform for research: civil engineering, architecture and urbanism
Method for stably curing ardealite
The invention belongs to the technical field of resource utilization of bulk industrial solid wastes, and particularly relates to a method for stably curing ardealite. After an active cementing material accounting for 5-10% of the mass of a dry basis, a reinforcing agent accounting for 0.5-2.0% of the mass of the dry basis and an adsorbent accounting for 1-2% of the mass of the dry basis are added into phosphogypsum produced by wet-process phosphoric acid and phosphoric acid is added to adjust the pH value, according to an HJ557-2010 solid waste analysis method-horizontal oscillation method, main pollutant dissolution substances of a mixture meet the A-class discharge requirement of the first-grade standard in the GB8978-1996 sewage comprehensive discharge standard, and the main pollutant dissolution substances meet the A-class discharge requirement of the second-grade standard in the GB8978-1996 sewage comprehensive discharge standard. The phosphorus content is smaller than or equal to 0.5 mg/L, the fluorine content is smaller than or equal to 10 mg/L, the total arsenic content is smaller than or equal to 0.5 mg/L, the pH value is 6-9, the mixture is conveyed to a site to be paved, rolled and subjected to a coring test, the 7-day strength unconfined compressive strength reaches 1.0-2.0 MPa, the 28-day strength unconfined compressive strength reaches 2.5-6.5 MPa, and the mixture can be widely used for mine pit filling and road base materials, provides technical support for phosphogypsum resource utilization and has important historical significance.
本发明属于大宗工业固体废弃物的资源化利用的技术领域，具体涉及一种磷石膏稳定固化的方法。来自湿法磷酸生产的磷石膏添加其干基质量5‑10%的活性胶结材料、0.5‑2.0%的增强剂、1‑2%的吸附剂并加磷酸调整pH后，按HJ557‑2010固体废弃物分析方法‑水平振荡法，混合体主要污染物溶出物满足GB8978‑1996污水综合排放标准中一级标准的A类排放要求，即磷含量≤0.5mg/L、氟含量≤10mg/L、总砷≤0.5mg/L、pH为6‑9，混合物运至现场摊铺、碾压、取芯测试，7天强度无侧限抗压强度达到1.0‑2.0MPa、28天强无侧限抗压强度达到2.5‑6.5MPa，可广泛用于矿坑充填及道路基层材料使用，为磷石膏资源化利用提供技术支撑，具有重要的历史意义。
Method for stably curing ardealite
The invention belongs to the technical field of resource utilization of bulk industrial solid wastes, and particularly relates to a method for stably curing ardealite. After an active cementing material accounting for 5-10% of the mass of a dry basis, a reinforcing agent accounting for 0.5-2.0% of the mass of the dry basis and an adsorbent accounting for 1-2% of the mass of the dry basis are added into phosphogypsum produced by wet-process phosphoric acid and phosphoric acid is added to adjust the pH value, according to an HJ557-2010 solid waste analysis method-horizontal oscillation method, main pollutant dissolution substances of a mixture meet the A-class discharge requirement of the first-grade standard in the GB8978-1996 sewage comprehensive discharge standard, and the main pollutant dissolution substances meet the A-class discharge requirement of the second-grade standard in the GB8978-1996 sewage comprehensive discharge standard. The phosphorus content is smaller than or equal to 0.5 mg/L, the fluorine content is smaller than or equal to 10 mg/L, the total arsenic content is smaller than or equal to 0.5 mg/L, the pH value is 6-9, the mixture is conveyed to a site to be paved, rolled and subjected to a coring test, the 7-day strength unconfined compressive strength reaches 1.0-2.0 MPa, the 28-day strength unconfined compressive strength reaches 2.5-6.5 MPa, and the mixture can be widely used for mine pit filling and road base materials, provides technical support for phosphogypsum resource utilization and has important historical significance.
本发明属于大宗工业固体废弃物的资源化利用的技术领域，具体涉及一种磷石膏稳定固化的方法。来自湿法磷酸生产的磷石膏添加其干基质量5‑10%的活性胶结材料、0.5‑2.0%的增强剂、1‑2%的吸附剂并加磷酸调整pH后，按HJ557‑2010固体废弃物分析方法‑水平振荡法，混合体主要污染物溶出物满足GB8978‑1996污水综合排放标准中一级标准的A类排放要求，即磷含量≤0.5mg/L、氟含量≤10mg/L、总砷≤0.5mg/L、pH为6‑9，混合物运至现场摊铺、碾压、取芯测试，7天强度无侧限抗压强度达到1.0‑2.0MPa、28天强无侧限抗压强度达到2.5‑6.5MPa，可广泛用于矿坑充填及道路基层材料使用，为磷石膏资源化利用提供技术支撑，具有重要的历史意义。
Method for stably curing ardealite
一种磷石膏稳定固化的方法
YANG YINGLUN (author) / XIA JUPEI (author)
2023-08-08
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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