Sludge curing agent and preparation method thereof

Abstract

The invention discloses a sludge curing agent. The sludge curing agent comprises the following raw materials in parts by weight: 4-6 parts of ardealite, 15-18 parts of cement, 26-30 parts of quick lime, 7-9 parts of lime stone, 28-32 parts of flyash, 1-2 part of hydroxypropyl methyl cellulose, 6-8 parts of glass-cermic powder, 6-8 parts of ultrafine ceramic powder, 10-15 parts of furfural dregs, 4-6 parts of medical stone and 8-10 parts of smectite clay. By the sludge curing agent, the water content of high-water-content sludge can be reduced remarkably, internal stress of the cured sludge can be reduced effectively, cracking is prevented, the curing strength is high, the curing time is short, and the sludge curing agent can be set and hardened quickly; and heavy metals in the sludge can be effectively adsorbed and cured, and requirements of landfilling and building earth filling are met. By the sludge curing agent, resource utilization of the sludge is realized, and the problem of environmental pollution and the like caused by deposition of a large amount of sludge is solved. The sludge curing agent is energy-saving and environment-friendly, and is low in engineering cost and good in benefit.

Description

Technical field

[0001] The invention belongs to the technical field of environmental protection, and specifically relates to a sludge curing agent and a preparation method thereof. Background technique

[0002] Natural sludge has high water content, low strength, and also contains toxic chemicals, pathogens and other harmful components. It has poor engineering performance. If it is not treated, it will cause great pollution to the environment. At present, silt curing agents are mainly used in China to solidify the sludge in order to reduce the water content of the sludge and increase the strength of the sludge to meet the requirements of earthwork filling. Although the traditional sludge curing agent (such as lime, cement, fly ash, etc.) has a certain improvement in strength, it takes a long time to cure, the curing effect is not obvious, and the water absorption effect is poor in the short term. Therefore, it is urgent to develop a new type of curing agent that can not only inc...

Examples

Embodiment 1

[0017] A sludge curing agent, in parts by weight, its raw materials include: 4 parts of phosphogypsum, 15 parts of cement, 26 parts of quicklime, 7 parts of limestone, 28 parts of fly ash, 1 part of hydroxypropyl methylcellulose, casting 6 parts of stone powder, 6 parts of ceramic powder, 10 parts of furfural residue, 4 parts of medical stone and 8 parts of smectite clay.

[0018] The preparation method of the above-mentioned sludge curing agent is: after mixing and grinding the raw materials of the curing agent, the curing agent has a specific surface area of ​​450m 2 / kg of powder.

Embodiment 2

[0020] A sludge curing agent, in parts by weight, its raw materials include: 6 parts of phosphogypsum, 18 parts of cement, 30 parts of quicklime, 9 parts of limestone, 32 parts of fly ash, 2 parts of hydroxypropyl methylcellulose, casting 8 parts of stone powder, 8 parts of ceramic powder, 15 parts of furfural residue, 6 parts of medical stone and 10 parts of smectite clay.

[0021] The preparation method of the above-mentioned sludge curing agent is: after mixing and grinding the raw materials of the curing agent, the curing agent has a specific surface area of ​​650m 2 / kg of powder.

Embodiment 3

[0023] A sludge curing agent, in parts by weight, its raw materials include: 5 parts of phosphogypsum, 16 parts of cement, 28 parts of quicklime, 8 parts of limestone, 30 parts of fly ash, 1.5 parts of hydroxypropyl methylcellulose, casting 7 parts of stone powder, 7 parts of ceramic powder, 12 parts of furfural residue, 5 parts of medical stone and 9 parts of smectite clay.

[0024] The preparation method of the above-mentioned sludge curing agent is as follows: after the raw materials of the curing agent are mixed and ground, the curing agent has a specific surface area of ​​550m 2 / kg of powder.

Technical field

[0001] The invention belongs to the technical field of environmental protection, and specifically relates to a sludge curing agent and a preparation method thereof. Background technique

[0002] Natural sludge has high water content, low strength, and also contains toxic chemicals, pathogens and other harmful components. It has poor engineering performance. If it is not treated, it will cause great pollution to the environment. At present, silt curing agents are mainly used in China to solidify the sludge in order to reduce the water content of the sludge and increase the strength of the sludge to meet the requirements of earthwork filling. Although the traditional sludge curing agent (such as lime, cement, fly ash, etc.) has a certain improvement in strength, it takes a long time to cure, the curing effect is not obvious, and the water absorption effect is poor in the short term. Therefore, it is urgent to develop a new type of curing agent that can not only inc...

Examples

Embodiment 1

[0017] A sludge curing agent, in parts by weight, its raw materials include: 4 parts of phosphogypsum, 15 parts of cement, 26 parts of quicklime, 7 parts of limestone, 28 parts of fly ash, 1 part of hydroxypropyl methylcellulose, casting 6 parts of stone powder, 6 parts of ceramic powder, 10 parts of furfural residue, 4 parts of medical stone and 8 parts of smectite clay.

[0018] The preparation method of the above-mentioned sludge curing agent is: after mixing and grinding the raw materials of the curing agent, the curing agent has a specific surface area of ​​450m 2 / kg of powder.

Embodiment 2

[0020] A sludge curing agent, in parts by weight, its raw materials include: 6 parts of phosphogypsum, 18 parts of cement, 30 parts of quicklime, 9 parts of limestone, 32 parts of fly ash, 2 parts of hydroxypropyl methylcellulose, casting 8 parts of stone powder, 8 parts of ceramic powder, 15 parts of furfural residue, 6 parts of medical stone and 10 parts of smectite clay.

[0021] The preparation method of the above-mentioned sludge curing agent is: after mixing and grinding the raw materials of the curing agent, the curing agent has a specific surface area of ​​650m 2 / kg of powder.

Embodiment 3

[0023] A sludge curing agent, in parts by weight, its raw materials include: 5 parts of phosphogypsum, 16 parts of cement, 28 parts of quicklime, 8 parts of limestone, 30 parts of fly ash, 1.5 parts of hydroxypropyl methylcellulose, casting 7 parts of stone powder, 7 parts of ceramic powder, 12 parts of furfural residue, 5 parts of medical stone and 9 parts of smectite clay.

[0024] The preparation method of the above-mentioned sludge curing agent is as follows: after the raw materials of the curing agent are mixed and ground, the curing agent has a specific surface area of ​​550m 2 / kg of powder.

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