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A kind of steel slag aggregate production method

A production method and technology for slag aggregates, which are applied in the directions of climate sustainability, sustainable waste treatment, solid waste management, etc., can solve the problems of large specification variability and lack of angularity, and achieve the reduction of needle flake content, Improve angularity and increase the effect of particle shaping process

Active Publication Date: 2021-09-21
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current steel slag aggregate processing technology mostly adopts jaw crusher or cone crusher, and the crushed aggregate still has problems such as large size variability and insufficient edges and corners.

Method used

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  • A kind of steel slag aggregate production method
  • A kind of steel slag aggregate production method
  • A kind of steel slag aggregate production method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Take the steel slag of a large iron and steel enterprise as the raw material, and carry out processing and production according to this production process. The main process parameters used are as follows:

[0047] Number of unloading bins 4 Radius of discharge opening (mm) 75 Discharge flow rate (m / s) 1.2 T delay (s)

[0048] The yield of the product obtained in this example (the sum of each grade of aggregates, excluding the 0-3mm part) is about 70%. 10 samples of steel slag aggregate were randomly sampled, the average content of needle flakes in the aggregate was 9.2%, and the coefficient of variation was 5.08%.

Embodiment 2

[0050] Take the steel slag of a large iron and steel enterprise as the raw material, and carry out processing and production according to this production process. The main process parameters used are as follows:

[0051] Number of unloading bins 5 Radius of discharge opening (mm) 90 Discharge flow rate (m / s) 1.6 T delay (s)

[0052] The yield of the product obtained in this example (the sum of all grades of aggregates, excluding the 0-3mm part) is about 67%. 10 samples of steel slag aggregates were randomly sampled, and the average content of needle flakes in the aggregates was 8.3%, and the coefficient of variation was 8.10%.

Embodiment 3

[0054] Take the steel slag of a large iron and steel enterprise as the raw material, and carry out processing and production according to this production process. The main process parameters used are as follows:

[0055] Number of unloading bins 6 Radius of discharge opening (mm) 100 Discharge flow rate (m / s) 2.0 T delay (s)

7 Shaping time (s) 40

[0056] The yield of the product obtained in this example (the sum of each grade of aggregates, excluding the 0-3 mm part) is about 65%. 10 samples of steel slag aggregates were randomly sampled, and the average content of needle flakes in the aggregates was 8.0%, and the coefficient of variation was 5.60%.

[0057] In the method for producing steel slag aggregate in the present invention, multiple batches of steel slag raw materials are uniformly mixed through a pre-homogenization process. In the pre-homogenization process provided by the present invention, by designing the structure of th...

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Abstract

The invention discloses a method for producing steel slag aggregates, which is applied to anti-slip asphalt pavement in salt spray areas, comprising the following steps: 1) transporting steel slag raw materials to a raw material pre-homogenization system to complete the pre-homogenization of raw materials; Step 1) The processed raw materials are transported to the crushing system and then sent to the shaping equipment. The shaping time is 10s-40s, so that the steel slag particles after shaping are not more than 10%; 3) The shaped steel slag aggregates It is transported to the screening system to obtain the crude products of various grades of steel slag aggregates. The invention maintains the stable performance of the steel slag aggregate by adding a pre-homogenization process; by adding a particle shaping process, the angularity of the steel slag aggregate is improved, and the needle-like content of the steel slag aggregate is significantly reduced.

Description

technical field [0001] The invention belongs to the technical field of building materials, and particularly relates to a method for producing steel slag aggregate, which is applied to anti-skid asphalt pavements or roadbeds in salt spray areas. Background technique [0002] The coastal areas have high humidity and belong to the salt spray area. Asphalt pavements in this area usually suffer from severe water damage for the following reasons: First, chloride ions accelerate the stripping of the asphalt film, and seawater contains a lot of chloride salts; the probability of water damage. Therefore, the application standard of aggregate for asphalt pavement in salt spray area is higher: the aggregate has good angularity and strong adhesion to asphalt. [0003] The application of steel slag aggregate can prevent water damage very well. Because the steel slag is alkaline, the micropores on the surface of the steel slag can absorb more structural asphalt and have strong adhesion...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B5/00C04B18/14
CPCC04B5/00C04B18/142Y02W30/91
Inventor 谢君胡锐吴少鹏庞凌陈美祝刘全涛张登峰
Owner WUHAN UNIV OF TECH
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