Coal gangue planting soil and preparation method thereof

By crushing, grading, and staged cementing of coal gangue, stable organic-inorganic composite aggregates are formed, which solves the problem of unstable aggregate structure in coal gangue planting soil. This achieves efficient heavy metal solidification and slow release of nutrients, improves the water permeability and water retention performance of the planting soil, and brings it closer to the ecological function of natural soil.

CN122439583APending Publication Date: 2026-07-24CHINA RAILWAY 20TH BUREAU GROUP CO LTD +1
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Patent Information

Application Number
CN202610818171.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-06-08
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

In existing technologies, when coal gangue is directly converted into planting soil, the formation efficiency of aggregate structure is low and the stability is not strong. Existing improvement schemes, such as adding humic acid, are inefficient and costly, and cannot effectively construct stable and porous aggregates.

Method used

By crushing and grading coal gangue, humic acid binders, including high molecular weight humic acid and fulvic acid, are added in stages, and calcium salts are used to promote charge action, combining with attapulgite to form stable organic-inorganic composite aggregates.

Benefits of technology

It significantly improves the aggregate stability and pore structure of coal gangue planting soil, realizes heavy metal solidification and slow release of nutrients, reduces costs, and has excellent water permeability and water retention performance, approaching the ecological function of natural soil.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application discloses coal gangue planting soil and a preparation method thereof, and belongs to the technical field of solid waste resource utilization, and aims at solving the technical problem of low formation efficiency and poor stability of the aggregate structure in the coal gangue planting soil obtained by the existing method. The preparation method comprises the following steps: crushing and grading treatment of coal gangue to obtain a coal gangue particle mixture; and cementation treatment of the coal gangue particle mixture to form stable organic-inorganic composite aggregates, so that the coal gangue planting soil is prepared. The coal gangue planting soil constructs a framework structure through crushing treatment, controls pore distribution through grading treatment, and forms stable organic-inorganic composite aggregates through staged cementation treatment, so that the content and stability of the aggregates in the coal gangue planting soil are significantly improved.
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Citation Information

Patent Citations

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