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Application of steel slag in preparation of railway ballast aggregate

A ballast aggregate and steel slag technology, applied in the field of metallurgical solid waste utilization, can solve the problems of structural safety threats that cannot be ignored, increase the possibility of accidents, and accelerate the reaction process, so as to promote sustainable development and reduce the volume expansion rate , the effect of prolonging the service life

Active Publication Date: 2022-07-29
湖南康纳新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the addition of quicklime in the steelmaking process inevitably leads to a certain amount of f-CaO in the steel slag, and the reaction between moisture in the air and f-CaO will cause the volume expansion of the steel slag aggregate during service The porous structure increases its specific surface area and accelerates the above-mentioned reaction process, making the hidden structural safety threat not to be ignored and increasing the possibility of accidents

Method used

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  • Application of steel slag in preparation of railway ballast aggregate
  • Application of steel slag in preparation of railway ballast aggregate
  • Application of steel slag in preparation of railway ballast aggregate

Examples

Experimental program
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Effect test

preparation example Construction

[0034] The preferred preparation method of the steel slag with silicone resin wear layer is as follows:

[0035] S1. Wrapping process: The steel slag is placed in the iron pan, and the steel slag is sprayed by means of a nozzle. During the treatment process, the steel slag is turned by an iron shovel, the temperature is 25 °C, and the time is 0.2 h; soaking process: The steel slag and the silicone resin were placed in the iron bucket, and the glass plate was used for constant stirring, the temperature was 25°C, and the time was 0.2h;

[0036] S2. Place the above-mentioned iron pan or iron bucket with steel slag in a 40°C oven for curing and curing for 24 hours;

[0037] S3. After curing and curing, wait for the steel slag to cool to room temperature.

Embodiment 1

[0049] The penetrant used in Example 1 is isobutyltriethoxysilane; the penetrant used in Example 2 is isobutyltriethoxysilane; the penetrant used in Example 3 is isobutyltriethoxysilane .

[0050] The thickening agent adopted in Example 1 is γ-aminopropyltriethoxysilane; the thickening agent adopted in Example 2 is γ-aminopropyltriethoxysilane; the thickening agent adopted in Example 3 is γ-aminopropyltriethoxysilane - Aminopropyltriethoxysilane.

[0051] The preparation method of the steel slag with silicone resin wear layer is as follows:

[0052] S1. Put 5kg of steel slag in a large enough iron pan, spray the steel slag through a nozzle, use an iron shovel to turn the steel slag during the treatment process, the dosage of the silicone resin solution is 200mL, the temperature is 25 ℃, and the time is 0.2 h;

[0053] S2. Place the above-mentioned iron pan with steel slag in a 40°C oven for curing and curing for 24h;

[0054] S3. After curing and curing, wait for the steel...

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Abstract

The invention discloses application of steel slag in preparation of railway ballast aggregate. The steel slag is provided with an organic silicon resin wearing layer. The surface of the steel slag is treated by adopting the organic silicon resin to form an organic silicon resin wearing layer, so that the strength performance and the geometric performance of the steel slag meet the requirements of the railway ballast, and the steel slag can be used as the railway ballast instead of natural aggregate. According to the invention, the steel slag aggregate with excellent performance is used as the railway macadam ballast to be applied to railway construction, so that the problem of raw material gap of railway construction can be solved, sustainable development of the iron and steel industry can be promoted, and the method has a positive effect on ecological environment protection.

Description

technical field [0001] The invention belongs to the field of metallurgical solid waste utilization, and more particularly relates to the application of steel slag in the preparation of railway ballast aggregates. Background technique [0002] In recent years, railway transportation has become one of the main modes of transportation in my country. By the end of 2020, the national railway operating mileage has reached 146,000 kilometers. The gradual expansion of railway construction needs to consume a large amount of natural high-quality aggregates, but the natural high-quality aggregate resources are increasingly scarce, which will inevitably hinder the development of the railway industry. Finding alternative resources for natural aggregates has become the first problem in railway construction. [0003] Steel slag is a by-product of the steelmaking process and belongs to bulk solid waste. However, the addition of quicklime during the steelmaking process inevitably leads to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B5/00B09B3/38B09B3/40
CPCC04B5/00B09B3/00Y02W30/91
Inventor 吴少鹏徐海钦谢君张登峰陈安琪庞凌陈美祝刘全涛许实李思丰
Owner 湖南康纳新材料有限公司
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