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Preparation method of phosphogypsum composite crystal modifier and alpha-semi-hydrated gypsum
The invention relates to the technical field of phosphogypsum crystal modifiers, in particular to a phosphogypsum composite crystal modifier and a preparation method of alpha-semi-hydrated gypsum. The phosphogypsum composite crystal modifier comprises an organic acid or an organic acid salt, a metal sulfate, a surfactant and a calcium phosphate salt. According to the phosphogypsum composite crystal modifier, the phosphogypsum can be smoothly subjected to crystal transformation, alpha-semi-hydrated gypsum with the crystal length-diameter ratio close to 2: 1 is prepared, the crystal form is stable, the standard consistency water consumption is reduced from 45% to 40% or below, the compressive strength exceeds 50 MPa, the breaking strength is close to or exceeds 7 MPa, and the phosphogypsum composite crystal modifier can be used for preparing alpha-semi-hydrated gypsum with the crystal length-diameter ratio close to 2: 1. And the method has important significance on engineering production of preparing alpha ultrahigh-strength gypsum from phosphogypsum.
本申请涉及磷石膏转晶剂技术领域，具体涉及磷石膏复合转晶剂及α‑半水石膏的制备方法。该磷石膏复合转晶剂包含有机酸或有机酸盐、金属硫酸盐、表面活性剂和磷酸钙盐。该磷石膏复合转晶剂能够将磷石膏顺利进行转晶，制得一种晶体长径比接近为2:1的α‑半水石膏，其晶型稳定，标准稠度用水量由45％降低至40％以下，抗压强度超过50MPa，抗折强度接近或超过7Mpa，对实现磷石膏制备α超高强石膏的工程化投产具有重要意义。
Preparation method of phosphogypsum composite crystal modifier and alpha-semi-hydrated gypsum
The invention relates to the technical field of phosphogypsum crystal modifiers, in particular to a phosphogypsum composite crystal modifier and a preparation method of alpha-semi-hydrated gypsum. The phosphogypsum composite crystal modifier comprises an organic acid or an organic acid salt, a metal sulfate, a surfactant and a calcium phosphate salt. According to the phosphogypsum composite crystal modifier, the phosphogypsum can be smoothly subjected to crystal transformation, alpha-semi-hydrated gypsum with the crystal length-diameter ratio close to 2: 1 is prepared, the crystal form is stable, the standard consistency water consumption is reduced from 45% to 40% or below, the compressive strength exceeds 50 MPa, the breaking strength is close to or exceeds 7 MPa, and the phosphogypsum composite crystal modifier can be used for preparing alpha-semi-hydrated gypsum with the crystal length-diameter ratio close to 2: 1. And the method has important significance on engineering production of preparing alpha ultrahigh-strength gypsum from phosphogypsum.
本申请涉及磷石膏转晶剂技术领域，具体涉及磷石膏复合转晶剂及α‑半水石膏的制备方法。该磷石膏复合转晶剂包含有机酸或有机酸盐、金属硫酸盐、表面活性剂和磷酸钙盐。该磷石膏复合转晶剂能够将磷石膏顺利进行转晶，制得一种晶体长径比接近为2:1的α‑半水石膏，其晶型稳定，标准稠度用水量由45％降低至40％以下，抗压强度超过50MPa，抗折强度接近或超过7Mpa，对实现磷石膏制备α超高强石膏的工程化投产具有重要意义。
Preparation method of phosphogypsum composite crystal modifier and alpha-semi-hydrated gypsum
磷石膏复合转晶剂及α-半水石膏的制备方法
ZHANG HUALI (author) / MA LI (author) / CHEN LUYU (author) / ZHANG KANGHUI (author)
2023-09-22
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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