Lake sludge-based non-fired wetland ceramsite substrate and preparation method thereof

By using industrial wastes such as lake silt, slag, and fly ash to prepare non-fired wetland ceramsite matrix, the problems of resource waste and environmental pollution caused by silt treatment are solved. This method achieves the preparation of high-strength, low-water-absorption ceramsite matrix, which is suitable for soil improvement and building materials, thereby improving the quality of the wetland ecological environment.

CN119263712BActive Publication Date: 2026-07-03SAFECLEEN TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SAFECLEEN TECH
Filing Date
2024-09-24
Publication Date
2026-07-03

AI Technical Summary

Technical Problem

In existing technologies, lake sludge treatment suffers from resource waste, environmental pollution, and high energy consumption. Traditional ceramsite production uses non-renewable raw materials and has a complex preparation process. Existing non-fired ceramsite has low strength and poor water resistance, making it difficult to achieve industrialization.

Method used

Using industrial waste such as lake silt, slag, and fly ash as raw materials, wetland ceramsite matrix is ​​prepared through a non-fired process. Sodium hydroxide solution is used to activate the gelation reaction, forming high-strength, low-water-absorption spherical ceramsite.

Benefits of technology

This technology enables the resource utilization of silt, reduces environmental impact and energy consumption, and produces high-performance, cost-effective ceramsite matrix suitable for soil improvement and building materials, thereby improving the wetland ecological environment.

✦ Generated by Eureka AI based on patent content.

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Abstract

This invention proposes a non-fired ceramsite matrix for wetlands based on lake silt and its preparation method. The ceramsite matrix comprises the following raw materials by weight: 55-65 parts mud cake, 10-30 parts slag, 10-30 parts fly ash, 3-7 parts sodium hydroxide solution, and water. The ceramsite matrix of this invention is prepared through the following steps: S1, batching: drying, crushing, and grinding the prepared mud cake to obtain mud powder; S2, mixing to prepare mud clumps; S3, preparing ceramsite green pellets; S4, steam curing the ceramsite green pellets from step three to obtain porous ceramsite; S5, naturally curing the ceramsite with water retention to obtain the ceramsite matrix. The ceramsite matrix prepared by this invention uses lake dredging silt as the main raw material and industrial waste such as fly ash and slag as auxiliary materials. It is green and environmentally friendly, with reasonable cost, achieving effective resource reuse, reducing energy consumption, and forming an environmentally functional material with water purification effects, achieving the effect of treating waste with waste, thus achieving multiple benefits.
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