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Sludge curing agent using Portland cement and production method of sludge curing agent

A Portland cement and production method technology, applied in chemical instruments and methods, water/sludge/sewage treatment, fixed/solidified sludge treatment, etc., can solve poor economic practicability, secondary damage, secondary pollution, etc. problems, to achieve the effect of improving curing stability, preventing leaching and transfer, and enhancing compactness

Inactive Publication Date: 2021-02-09
广西云燕特种水泥建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, general physical restoration has poor economic practicability, and it is easy to cause "secondary damage" and "secondary pollution" problems; phytoremediation and microbial restoration technologies are difficult, time-consuming, and repairing effects are poor

Method used

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  • Sludge curing agent using Portland cement and production method of sludge curing agent
  • Sludge curing agent using Portland cement and production method of sludge curing agent

Examples

Experimental program
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Effect test

Embodiment 1

[0028] A sludge solidifying agent using Portland cement, made of the following raw materials in parts by weight: 75 parts of Portland cement, 12 parts of ultrafine metakaolin, 12 parts of fly ash, 4 parts of dispersible latex powder, graphene 0.08 parts, 0.02 parts of ettringite, 5 parts of sodium silicate, 8 parts of calcium hydroxyphosphate, and 8 parts of modified nano-montmorillonite.

[0029] The Portland cement is an early-strength Portland cement.

[0030] The particle size of the ultrafine metakaolin is less than 20 μm.

[0031] The redispersible latex powder is acrylic rubber powder or vinyl acetate-ethylene copolymer powder.

[0032] The production method of the modified nano-montmorillonite is as follows: heating the montmorillonite at 150° C. for 5.5 hours, and then grinding and pulverizing to prepare the nano-montmorillonite.

[0033] The production method of described sludge curing agent comprises the steps:

[0034] (1) Grind Portland cement, fly ash, ettring...

Embodiment 2

[0037] A sludge solidifying agent using Portland cement, made of the following raw materials in parts by weight: 90 parts of Portland cement, 16 parts of superfine metakaolin, 16 parts of fly ash, 7 parts of dispersible latex powder, graphene 0.1 part, 0.09 part of ettringite, 8 parts of sodium silicate, 11 parts of calcium hydroxyphosphate, and 11 parts of modified nano-montmorillonite.

[0038] The Portland cement is an early-strength Portland cement.

[0039] The particle size of the ultrafine metakaolin is less than 20 μm.

[0040] The redispersible latex powder is acrylic rubber powder or vinyl acetate-ethylene copolymer powder.

[0041] The production method of the modified nano-montmorillonite is as follows: heating the montmorillonite at 160° C. for 5 hours, and then grinding and pulverizing the nano-montmorillonite to produce the nano-montmorillonite.

[0042] The production method of described sludge curing agent comprises the steps:

[0043] (1) Grind Portland ce...

Embodiment 3

[0046] A sludge solidifying agent using Portland cement, made of the following raw materials in parts by weight: 105 parts of Portland cement, 20 parts of ultrafine metakaolin, 20 parts of fly ash, 10 parts of dispersible latex powder, graphene 0.12 parts, 0.16 parts of ettringite, 10 parts of sodium silicate, 14 parts of calcium hydroxyphosphate, and 14 parts of modified nano-montmorillonite.

[0047] The Portland cement is an early-strength Portland cement.

[0048] The particle size of the ultrafine metakaolin is less than 20 μm.

[0049] The redispersible latex powder is acrylic rubber powder or vinyl acetate-ethylene copolymer powder.

[0050] The production method of the modified nano-montmorillonite is as follows: heating the montmorillonite at 170° C. for 5.5 hours, and then grinding and pulverizing to prepare the nano-montmorillonite.

[0051] The production method of described sludge curing agent comprises the steps:

[0052] (1) Grind Portland cement, fly ash, et...

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Abstract

The invention discloses a sludge curing agent using Portland cement and a production method of sludge curing agent. The sludge curing agent is prepared from the following raw materials in parts by weight: 75-105 parts of Portland cement, 12-20 parts of superfine metakaolin, 12-20 parts of fly ash, 4-10 parts of dispersible latex powder, 0.08-0.12 part of graphene, 0.02-0.16 part of ettringite, 5-10 parts of sodium silicate, 8-14 parts of hydroxyl calcium phosphate and 8-14 parts of modified nano montmorillonite. The method comprises the followings steps: grinding the Portland cement, the fly ash, the ettringite, the sodium silicate and the hydroxyl calcium phosphate,and performing sieving with a 200-300-mesh sieve; and uniformly mixing the superfine metakaolin, the modified nano montmorillonite and the graphene, adding an undersize product obtained in the step (1) and the dispersible latex powder, and performing full and uniform mixing to obtain a finished product. The sludge curing agent provided by the invention has strong dehydration property, and can effectively adsorb heavy metals in sludge and fix the heavy metals, so that the cured sludge can be recycled.

Description

technical field [0001] The invention belongs to the technical field of sludge treatment, in particular to a sludge solidifying agent using Portland cement and a production method thereof. Background technique [0002] Silt refers to the fine-grained soil that is deposited in still water and slow flowing water and contains organic matter. my country has abundant river, lake and tidal flat resources. Due to the slow flow of water, rivers and lakes are easy to produce silt. Dredging in rivers and waterways A large amount of silt will be produced in the construction, widening, and port construction and expansion projects; in addition, a large amount of silt will also be produced in the process of industrial and agricultural production and sewage treatment. These silts have large output, high water content, and high pollutant content. It is difficult to deal with it quickly. The existing treatment methods generally have problems such as environmental pollution, high treatment cost,...

Claims

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Application Information

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IPC IPC(8): C04B28/18C02F11/00C02F11/143C02F11/145C02F101/20
CPCC02F11/008C02F2101/20C04B28/186C04B2201/50C02F11/143C02F11/145C04B7/02C04B14/106C04B18/08C04B2103/0057C04B14/024C04B22/14C04B12/04C04B22/16
Inventor 黄芳杨毅蒙传刚王志通
Owner 广西云燕特种水泥建材有限公司