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Dredged sludge curing agent as well as preparation method and use method thereof

A technology of dredging silt and curing agent, which is applied in the field of environmental engineering, can solve the problems of land resource erosion and waste, road construction earthwork land consumption, tailings pond waste land, etc., and achieve low cost, enhanced speed, and significant social effects

Inactive Publication Date: 2020-07-31
虞克夫
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Dredging silt occupies land, tailings ponds waste land, and road construction earthwork consumes land. It is undoubtedly a waste of land resources that human beings depend on for survival, and it does not conform to the national policy of building a resource-saving society.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The dredging silt solidifying agent of the present embodiment is made up of quartz tailings, iron ore tailings, carbide slag and " congealing stone ", and composition is quartz tailings slag by mass ratio: iron ore tailings: carbide slag: " congealing stone "= 1:1:1:1 for mixing; among them, Ca(OH) of carbide slag 2 The grade is 67%, and the particle size of quartz tailings, iron ore tailings, carbide slag and "congealing stone" is less than or equal to 100 mesh.

[0027] Quartz tailings slag contains 87.6% silica, 1.41% alumina, and 0.2% calcium oxide by mass percentage; iron ore tailings contains 72.5% silica (without associated elements); calcium carbide The slag contains 63% of calcium oxide, 8% of quartz, 0.6% of aluminum oxide, and 1.3% of iron oxide in terms of mass percentage; "congealing stone" is a combination of industrial waste and diagenetic agent.

[0028] The preparation method of the dredging silt solidifying agent of the present embodiment may further ...

Embodiment 2

[0036] The dredging silt solidifying agent of the present embodiment is made up of quartz tailings, iron ore tailings, carbide slag and " congealing stone ", and composition is quartz tailings slag by mass ratio: iron ore tailings: carbide slag: " congealing stone "= 2:2:3:3 for mixing; among them, the Ca(OH) of carbide slag 2 The grade is 67.9%, and the particle size of quartz tailings, iron ore tailings, carbide slag and "congealing stone" is all ≤100 mesh.

[0037] Quartz tailings slag contains 89.3% silica, 1.2% alumina, and 0.97% calcium oxide by mass percentage; iron ore tailings contains 74.2% silica (without associated elements); calcium carbide The slag contains 60% calcium oxide, 6.7% quartz, 2.7% magnesium oxide, 0.5% aluminum oxide, and 1% iron oxide.

[0038] The preparation method of the dredging silt solidifying agent of the present embodiment may further comprise the steps:

[0039] Step 1. Wash the quartz tailings, iron ore tailings, and calcium carbide slag...

Embodiment 3

[0046] The dredging silt solidifying agent of the present embodiment is made up of quartz tailings, iron ore tailings, carbide slag and " congealing stone ", and composition is quartz tailings slag by mass ratio: iron ore tailings: carbide slag: " congealing stone "= 2:2:3:3.5 for mixing; among them, the Ca(OH) of carbide slag 2 The grade is 72.8%, and the particle size of quartz tailings, iron ore tailings, carbide slag and "congealing stone" is ≤100 mesh.

[0047] Quartz tailings slag contains 91.10% silica, 1.55% alumina, and 1.80% calcium oxide by mass percentage; iron ore tailings contains 71% silica (without associated elements); calcium carbide The slag contains 67.40% of calcium oxide, 10.30% of quartz, 4.80% of magnesium oxide, 1% of aluminum oxide, and 1.70% of iron oxide.

[0048] The preparation method of the dredging silt solidifying agent of the present embodiment may further comprise the steps:

[0049] Step 1. Wash the quartz tailings, iron ore tailings, and ...

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Abstract

The invention discloses a dredged sludge curing agent, a preparation method and a use method. The invention belongs to the technical field of environmental engineering. In the dredged sludge curing agent, the mass percent ratio of quartz tailings, iron ore tailings, carbide slag and 'coagulated stone' is (1-3.5): (1-3.5): (1-3.5): (1-3.5). The preparation method comprises the steps that the quartztailings, the iron ore tailings and the carbide slag are washed, dried, crushed and ground, the 'coagulated stone' is also ground and treated and then the materials are evenly mixed in proportion. The use method of the dredged sludge curing agent comprises the steps that dredged sludge and the added dredged sludge curing agent are stirred to be uniform in proportion, curing is achieved, the compressive strength can reach 60-82.6 KPa after the mixture is stacked in a normal-temperature and normal-pressure field for three days, and the pH of leachate ranges from 6.9 to 8.9. The dredged sludge curing agent adopts solid waste as a raw material, achieving an effect of treating waste with waste, and is wide in raw material source and low in cost. The cured dredged sludge is used as soil for road filling.

Description

technical field [0001] The invention belongs to the technical field of environmental engineering, and in particular relates to a river dredging sludge solidifying agent, a preparation method and a use method. Background technique [0002] China is one of the countries with the most rivers in the world. There are many long-standing rivers in China. Some rural areas in China are full of rivers, which bring abundant water resources to industrial and agricultural production and people's lives, and create material civilization. . In the eastern part of our country where the river network is dense, some areas are silted up in the river and the silt is lifted up. During the annual flood season, some areas have poor flood drainage and flooding, which endangers farms and farmland and brings natural disasters to people; The river channel is silted up, and navigation is blocked. Year after year, the river channel dredging and silt accumulates on the farmland on the bank of the river c...

Claims

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Application Information

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IPC IPC(8): C02F11/14C02F11/00C02F11/143C02F11/145
CPCC02F11/145
Inventor 虞克夫
Owner 虞克夫
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