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A method for soil improvement of a mixture of industrial solid waste and sludge using modified montmorillonite

A technology of montmorillonite and montmorillonite, applied in the field of modified montmorillonite products and its preparation, can solve the problems of difficult harmless treatment, low comprehensive utilization rate of Dianchi dredged sediment, and reduce leaching loss , promote healthy development, and solve problems

Active Publication Date: 2021-11-16
云南凯威特新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problems that the comprehensive utilization rate of phosphogypsum, calcium carbide slag, and Dianchi Lake dredged bottom mud is not high, and the harmless treatment is difficult, the invention provides a soil improvement method for the mixture of industrial solid waste and sludge by using modified montmorillonite method

Method used

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  • A method for soil improvement of a mixture of industrial solid waste and sludge using modified montmorillonite
  • A method for soil improvement of a mixture of industrial solid waste and sludge using modified montmorillonite

Examples

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Embodiment 1

[0032] (1) Preparation of modified montmorillonite

[0033] Take 3 parts of ethylenediaminetetraacetic acid, 2 parts of diethanolamine, 0.4 part of Wenlun rubber, 44.6 parts of montmorillonite, and add 50 parts of water to stir in order according to the number of parts by mass. The temperature is controlled at 55 °C and the reaction time is 2 hours to obtain the modified montmorillonite. off the soil.

[0034] (2) Take 5 parts of modified montmorillonite, 48 parts of Dianchi dredged sediment, and 38 parts of phosphogypsum in sequence according to the parts by mass, and mix and stir evenly.

[0035] (3) Add 9 parts of carbide slag to the step (2) in parts by mass, stir and mix evenly, and adjust the pH value of the mixture to 6.8.

[0036] (4) The mixture obtained in step (3) is stored and aged for 4 months under natural conditions to obtain black gray soil.

Embodiment 2

[0038] (1) Preparation of modified montmorillonite

[0039] Take 5 parts of ethylenediaminetetraacetic acid, 6 parts of diethanolamine, 0.2 part of Wenlun rubber, 38.8 parts of montmorillonite and add 50 parts of water to stir in order according to the number of parts by mass. The temperature is controlled at 40 °C and the reaction time is 1.5 hours to obtain the modified Montmorillonite.

[0040] (2) Take 8 parts of modified montmorillonite, 34 parts of Dianchi dredged sediment, and 46 parts of phosphogypsum in sequence according to the parts by mass, and mix and stir evenly.

[0041] (3) Add 12 parts of carbide slag to the step (2) in parts by mass, stir and mix evenly, and adjust the pH value of the mixture to 7.2.

[0042] (4) The mixture obtained in step (3) is stored and aged for 6 months under natural conditions to obtain black gray soil.

Embodiment 3

[0044] (1) Preparation of modified montmorillonite

[0045] Take 4 parts of ethylenediaminetetraacetic acid, 5 parts of diethanolamine, 0.3 part of Wenlun rubber, 40.7 parts of montmorillonite and add 50 parts of water to stir in order according to the number of parts by mass. The temperature is controlled at 60 °C and the reaction time is 1 hour to obtain the modified montmorillonite. off the soil.

[0046] (2) Take 6 parts of modified montmorillonite, 42 parts of Dianchi dredged sediment, and 42 parts of phosphogypsum in sequence according to the parts by mass, and mix and stir evenly.

[0047] (3) Add 10 parts of carbide slag to the step (2) in parts by mass, stir and mix evenly, and adjust the pH value of the mixture to 7.5.

[0048] (4) The mixture obtained in step (3) was stored and aged for 3 months under natural conditions to obtain black gray soil.

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Abstract

The invention relates to a soil improvement method for a mixture of industrial solid waste and sludge by using modified montmorillonite. Gypsum is mixed uniformly in a certain proportion, and then calcium carbide slag is added for acid-base neutralization reaction, fluoride ions and heavy metal ions such as Cr, Zn, Cd, As in the mixture are fixed, and the obtained solid product is stored and aged for 3 to 6 months That is, soil is obtained. The obtained soil is black-gray loose particles, the soil has a stable pH value, and is rich in various nutrients required for plant growth. The soil is suitable for vegetation restoration in the "five mining areas" and industrial waste dumps such as phosphogypsum and carbide slag. The method realizes the harmless treatment under the synergistic action of various solid wastes, and has good environmental protection and economic efficiency.

Description

technical field [0001] The invention belongs to the technical field of harmless treatment of solid waste, and specifically relates to a modified montmorillonite product and a preparation method thereof; and a method for improving the soil of a mixture of industrial solid waste and sludge by using modified montmorillonite field. Background technique [0002] Phosphogypsum is the solid waste produced when phosphoric acid rock is treated with sulfuric acid during phosphoric acid production. Every ton of phosphoric acid produced (100%P 2 o 5 ) to produce 5-6t (dry basis) of phosphogypsum. Phosphogypsum except CaSO 4 In addition, it also contains insoluble quartz, undecomposed apatite, insoluble P 2 o 5 , Phosphate of fluorine, aluminum, magnesium, water-soluble P 2 o 5 , fluoride, sulfate and other impurities, these impurities affect the utilization of phosphogypsum. According to statistics from the China Phosphate and Compound Fertilizer Industry Association, the total...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01G24/10A01G24/20A01B79/00C09K17/40C01B33/40B09B3/00
CPCA01B79/00A01G24/10A01G24/20B09B3/00C01B33/40C09K17/40
Inventor 刘玮陈家荣王庄杨正清李阳辉
Owner 云南凯威特新材料股份有限公司
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