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Production method of steel slag aggregate for asphalt concrete

A technology for asphalt concrete and a production method, which is applied in the directions of climate sustainability, sustainable waste treatment, solid waste management, etc., can solve the problems of large mud content, not rich in angularity, and large variability of steel slag aggregate specifications, etc. It can achieve the effect of easy breakage, obvious environmental protection benefits, and improved surface cleanliness and surface alkalinity.

Inactive Publication Date: 2017-01-25
葛洲坝武汉道路材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problems of the steel slag aggregate obtained in the prior art, such as large specification variability, insufficient angularity, and large mud content, the present invention provides a kind of steel slag aggregate with reasonable design, which can realize feeding, secondary crushing, magnetic separation, screening, Production method of steel slag aggregate for asphalt concrete in processes such as water washing and return material treatment

Method used

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  • Production method of steel slag aggregate for asphalt concrete
  • Production method of steel slag aggregate for asphalt concrete
  • Production method of steel slag aggregate for asphalt concrete

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Feeding: Raw materials enter the vibrating feeder, and pass through the 5mm screen under it to remove mud and small-size flakes;

[0029] First-level magnetic separation: the raw materials screened by the screen pass through the magnetic separation device for first-level magnetic separation, mainly to separate iron and other metals;

[0030] Primary crushing: the material after primary magnetic separation enters the roller crusher for primary crushing;

[0031] Secondary magnetic separation: the materials after the initial crushing are subjected to secondary magnetic separation;

[0032] Fine crushing: The primary crushing and secondary magnetic separation materials enter the cone crusher for fine crushing, and the content of needle-like flake particles of steel slag after crushing is not more than 15%;

[0033] Three-stage magnetic separation: three-stage magnetic separation for crushed materials;

[0034] The above-mentioned three-stage magnetic separation is comple...

Embodiment 2

[0049] Take the steel slag aged for one year after hot-splashing treatment in a large iron and steel enterprise in Hubei as raw material, the others are the same as in Example 1, and some parameters of the vibrating screen and belt conveyor used are as follows:

[0050]

[0051] The yield of the obtained product (the sum of aggregates of all grades, excluding the 0-4.75mm part) is about 70%.

Embodiment 3

[0053] Take the steel slag aged for one year after hot-splashing treatment in a large iron and steel enterprise in Hubei as raw material, the others are the same as in Example 1, and some parameters of the vibrating screen and belt conveyor used are as follows:

[0054]

[0055] The yield of the obtained product (the sum of all grades of aggregates, excluding the 0-4.75mm part) is about 60%.

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Abstract

The invention relates to a production method of a steel slag aggregate for asphalt concrete and belongs to the technical fields of processing and production of road aggregates. The production method particularly comprises the steps of feeding, crushing, sieving and water washing. According to the production method, steel slag raw materials are subjected to second-grade crushing, three times of magnetic separation processes and five times of sieving processes so as to separate aggregates of different specifications; the surfaces of the aggregates are cleaned with high pressure water, and a five-stage settling pond is arranged to circularly utilize flushing water. According to the production method, the problems that a steel slag aggregate product produced by virtue of a traditional production process is large in specification variability, poor in angularity and high in silt content are solved, the high-efficiency production is realized, and the high-quality steel slag aggregate for the asphalt concrete is produced.

Description

technical field [0001] The invention belongs to the technical field of road aggregate processing and production, and in particular relates to a production method of steel slag aggregate for asphalt concrete. Background technique [0002] Steel slag is the slag discharged during the steelmaking process and is the main solid by-product of the smelting industry. The application of steel slag with excellent performance in the preparation of asphalt concrete instead of part of the natural gravel can not only improve the comprehensive performance of asphalt concrete, but also have great significance for improving the economic benefits of iron and steel enterprises, promoting the sustainable development of the iron and steel industry, and strengthening the protection of the ecological environment. . [0003] Coarse steel slag that has not undergone further processing (such as slag mountain cooling method) will still have a particle diameter of about 30 cm or more after natural cra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B18/14
CPCY02W30/91
Inventor 丁卫青吴少鹏邓骞胡天乐谢君李福洲严爱平李经堂贾晓娟李飞吴小兰
Owner 葛洲坝武汉道路材料有限公司
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