A method for pretreating a phosphogypsum-based cementitious material

By drying, grinding, and sealing phosphogypsum, the problems of uneven particle size and uneven moisture distribution of phosphogypsum were solved, improving the uniformity and cementing performance of phosphogypsum-based cementitious materials, enhancing the strength and workability of roadbed materials, and reducing environmental pollution.

CN122167126APending Publication Date: 2026-06-09GUIZHOU QINGYU TECHNOLOGY CO LTD
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
GUIZHOU QINGYU TECHNOLOGY CO LTD
Filing Date
2026-02-12
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

Existing technologies are unable to effectively solve the problems of uneven particle size, easy agglomeration, and uneven moisture distribution of phosphogypsum, resulting in poor uniformity of roadbed material mixtures and insufficient hydration reaction, which affects the quality and strength of the project.

Method used

A pretreatment method involving drying, grinding, fine mixing with water, and sealing is adopted to homogenize phosphogypsum particles and moisture, activate its gelling properties, and improve the homogeneity and workability of the material.

Benefits of technology

It significantly improves the uniformity and cementing performance of phosphogypsum-based cementitious materials, enhances the strength and stability of roadbed materials, and reduces dust pollution during construction.

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Abstract

This invention belongs to the field of building materials manufacturing technology and relates to a pretreatment method for phosphogypsum-based gel materials, comprising the following steps: S1, drying and grinding; S2, initial batching and mixing: mixing fine dry phosphogypsum powder and a curing agent with water to form a wet mixture; S3, sealing and curing: curing for 12-24 hours; S4, secondary mixing and final mixing: mixing the wet mixture with cement to obtain a mixed material; S5, timely molding. This invention improves the performance of phosphogypsum as a roadbed material through homogenization and curing activation. This method is also applicable to the pretreatment of products such as cementitious materials, phosphogypsum fluidized solidified soil, and phosphogypsum ecological concrete prepared from phosphogypsum. The beneficial effects are: 1. improved homogeneity; 2. activated material properties; 3. optimized construction performance; 4. environmentally friendly.
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