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Heavy metal zinc polluted soil curing agent taking industrial waste carbide slag as raw material

A technology of waste calcium carbide and curing agent, applied in the restoration of polluted soil, agriculture, organic fertilizer, etc., can solve the problems of poor durability, poor curing effect and high cost of cured soil

Inactive Publication Date: 2011-05-18
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to solve the shortcomings of the existing heavy metal-contaminated soil curing agent, especially the heavy metal zinc-contaminated soil curing agent, that the cost is high, the durability of the solidified soil is poor, and the curing effect is not good, the present invention provides a heavy metal Zinc-contaminated soil curing agent, the invention can not only reduce the cost of curing agent, enhance the curing effect of contaminated soil, but also turn carbide slag into treasure, and play the role of comprehensive utilization and environmental protection

Method used

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  • Heavy metal zinc polluted soil curing agent taking industrial waste carbide slag as raw material
  • Heavy metal zinc polluted soil curing agent taking industrial waste carbide slag as raw material
  • Heavy metal zinc polluted soil curing agent taking industrial waste carbide slag as raw material

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Embodiment 1

[0015] A heavy metal zinc-contaminated soil solidifying agent using industrial waste carbide slag as raw material, comprising: ordinary Portland cement and industrial waste carbide slag, the mass percentage of which is: 70%-80%: 20%-30%, in this implementation In the example, the mass percent of ordinary Portland cement and industrial waste carbide slag is: 70%: 30%, 80%: 20% or 72%: 28%, and the ordinary Portland cement can be P.O.32.5 ordinary silicon Salt cement and carbide slag are completely dry.

Embodiment 2

[0017] A solidification agent for heavy metal zinc-contaminated soil using industrial waste carbide slag as raw material, the solidification agent is composed of ordinary Portland cement, industrial waste carbide slag and sodium-based bentonite, wherein ordinary Portland cement and industrial waste carbide slag The mass percentage is: 70%-80%: 20%-30%, the mixing amount of sodium bentonite is not more than 15% of the sum of ordinary portland cement and industrial waste calcium carbide slag mixing amount, in the present embodiment , the mass percentage of ordinary Portland cement and industrial waste carbide slag is: 70%: 30%, 80%: 20% or 75%: 25%; the mixing amount of sodium bentonite is ordinary Portland cement and industrial waste 15%, 12%, 0.1% or 7% of the sum of carbide slag additions.

[0018] According to the above formula, the present invention mixes it evenly to obtain the finished curing agent. The dosage of curing agent is 15% or 18% (quality of curing agent / qualit...

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Abstract

The invention discloses a heavy metal zinc polluted soil curing agent taking industrial waste carbide slag as a raw material, which comprises the following components in percentage by mass: 70 to 80 percent of common silicate cement and 20 to 30 percent of industrial waste carbide slag. The cement is a common curing agent for the treatment of heavy metal polluted soil, and the effect of improving the strength of cured soil can be achieved by adding cement powder or cement paste into the polluted soil and fully stirring. When the cement is separately used in a project, the mixing ratio is relatively high and is about 12 to 18 percent. Even so, the strength, durability and curing quality of the cured soil are still difficult to ensure. Aiming at the phenomena, the invention provides a heavy metal zinc polluted soil curing formula taking the industrial waste carbide slag as the raw material. The formula consists of cement, carbide slag and bentonite. By promoting the hydration reaction of the cement and enhancing the Zn<2+> coating capability of crystal, the purposes of reducing the consumption of the cement and improving the curing effect are fulfilled.

Description

Technical field: [0001] The invention relates to the technical field of heavy metal-contaminated soil treatment, in particular to a curing agent formula for treating heavy metal zinc-contaminated soil. Background technique: [0002] In recent years, with the development of cities in our country, many chemical and electronic companies have moved their sites from urban areas to the outer suburbs. Due to the imperfect technology of most companies to deal with the "three pollutants" discharges, the foundation soil of the original site was polluted by heavy metals and became industrial pollution. earth. The physical and mechanical properties of the polluted foundation soil will change, resulting in a reduction in the bearing capacity of the foundation, resulting in instability or destruction of buildings, and a series of engineering quality accidents; on the other hand, the pollution components in industrially polluted sites will migrate to the surrounding environment, Harm the ...

Claims

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Application Information

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IPC IPC(8): C09K17/10B09C1/08
Inventor 杜延军刘松玉张帆陈志龙蒋宁俊
Owner SOUTHEAST UNIV
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