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Method for treating red mud by using soil stabilizer

A technology of soil stabilizer and red mud, which is applied in the field of environmental protection, can solve the problems of unreasonable treatment process and unsatisfactory treatment effect, and achieve the effects of maintaining sustainability, promoting local economic development, and improving water immersion resistance

Inactive Publication Date: 2019-12-13
光大国信环保科技(北京)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, due to unreasonable treatment process, there are defects such as unsatisfactory treatment effect

Method used

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  • Method for treating red mud by using soil stabilizer
  • Method for treating red mud by using soil stabilizer
  • Method for treating red mud by using soil stabilizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Taking Shandong Chiping red mud as an example, it is used as pavement base course and subbase course material, and the mixing ratio of each raw material (in mass percentage) (water is externally added):

[0048] The amount of soil curing agent is 0.02% of the mass sum of cement, hydrated lime, and red mud; the mass ratio of cement, hydrated lime, and red mud is 5:5:90; the amount of added water is the total mass (that is, the total dry mass except water) 27%, determined according to the site soil, not too wet or too dry. Mixing, paving, rolling, curing, etc. form a hardened body. The interval between mixing and rolling shall not exceed 6 hours.

[0049] The formula of the soil stabilizer is: calcium lignosulfonate 30kg, water 100kg, concentrated hydrochloric acid 35kg, anionic active agent petroleum sulfonate 5kg, catalyst ethylenediamine 5kg, aluminum sulfate 18kg, early strength agent calcium sulfate 5kg, nonionic Surfactant polyethylene glycol PEG-200 1kg.

[0050...

Embodiment 2

[0057] Taking Shandong Chiping red mud as an example, it is used as pavement base and sub-base materials, and the mixing ratio of each raw material (water is added outside):

[0058] The consumption of soil solidifying agent is 0.02% of the quality sum of cement, slaked lime, red mud (i.e. the total dry mass except water); the mass ratio of cement, slaked lime, red mud is 4:4:92; 27% of the mass, determined according to the soil quality of the site, not too wet or too dry. Mixing, paving, rolling, curing, etc. form a hardened body. The interval between mixing and rolling shall not exceed 6 hours.

[0059] The formula of the soil stabilizer is: calcium lignosulfonate 25kg, water 100kg, concentrated sulfuric acid 18kg, concentrated hydrochloric acid 10kg, anionic surfactant petroleum sulfonate 5kg, catalyst ethylenediamine 5kg, aluminum sulfate 15kg, early strength agent calcium sulfate 5kg, nonionic surfactant polyethylene glycol PEG-200 1kg.

[0060] Above-mentioned soil so...

Embodiment 3

[0067] Taking Shandong Chiping red mud as an example, it is used as pavement base course and subbase course material, and the mixing ratio of each raw material (in mass percentage) (water is externally added):

[0068] The dosage of the soil curing agent is 0.015% of the mass sum of cement, hydrated lime and red mud (that is, the total dry mass except water); the mass ratio of cement, hydrated lime and red mud is 3:4:93. The amount of additional water is 27% of the total mass, determined according to the soil quality on site, and should not be too wet or too dry. The rest are the same as in Example 1.

[0069] The experimental results are as follows: The heavy-duty compaction test and the unconfined compressive strength test of the pavement base material are carried out according to the "Test Regulations for Highway Engineering Inorganic Binder Stable Materials" JTG E51-2009 and "Highway Soil Engineering Test Regulations" JTG E40-2007. The maximum dry density of this mix rati...

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Abstract

The invention relates to a method for treating red mud by using a soil stabilizer. The soil stabilizer, a cementing material and red mud are mixed to obtain a mixture, and then forming is carried out.A series of performance tests on unconfined compressive strength, freeze thawing resistance, water stability and the like are carried out, and results show that a pavement base course is good in performance, has better performance than a conventional process in the aspects of compressive strength, deflection value and the like, and has the advantages of improving quality, reducing manufacturing cost, saving energy, protecting the environment and the like. The method can be widely applied to the field of civil engineering, and the added value of red mud is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a method for treating red mud with a soil curing agent. Background technique [0002] At present, with the development of the aluminum industry and the reduction of bauxite ore grades across the country, the amount of red mud will increase. It has become a consensus to use red mud reprocessing to turn waste into treasure and reduce pollution. Most of the alumina factories at home and abroad stack the red mud in the storage yard, build a dam for wet storage, and rely on natural sedimentation to separate the solution and return it for reuse. This method easily causes a large amount of waste lye to infiltrate into the nearby land, causing soil alkalization, swamping, and polluting surface and groundwater sources. In some cases, the red mud is dried and dehydrated and then stored in a dry method. These two methods not only occupy a large amount of land,...

Claims

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Application Information

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IPC IPC(8): C04B28/10
CPCC04B28/10C04B2201/50C04B2111/0075C04B2111/00017C04B7/00C04B18/0409C04B24/18C04B22/122C04B24/16C04B24/121C04B22/148C04B22/143C04B24/28C04B22/141
Inventor 杨华锋马永江朱月侠
Owner 光大国信环保科技(北京)有限公司
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