Production process for recycling premixed concrete solid waste residues

A technology of ready-mixed concrete and solid waste, which is applied in the direction of solid waste management, sustainable waste treatment, climate sustainability, etc. It can solve the problems of difficult separation, high energy consumption, and difficult pulverization process, so as to reduce the difficulty, The effect of increasing throughput and reducing energy consumption

Active Publication Date: 2014-04-02
广东嘉阳工程材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this problem, there are problems such as difficult separation and high energy consumption in the processing process tried in the industry, especially it is difficult to effectively carry out the follow-up milling process

Method used

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  • Production process for recycling premixed concrete solid waste residues

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041]1) Collect concrete waste in the concrete batching plant;

[0042] 2) The concrete waste slag is broken into blocks with a particle size of less than 30 mm by using a medium-pressure toothed roller press 1;

[0043] 3) Use a vibrating sieve to separate the coarse aggregate with a particle size greater than 10 mm from the product obtained in step 2); the coarse aggregate index meets the technical requirements of recycled coarse aggregate for concrete (GB / T 25177).

Embodiment 2

[0045] 1) Collect concrete waste in the concrete batching plant;

[0046] 2) The concrete waste slag is broken into blocks with a particle size of less than 30 mm by using a medium-pressure toothed roller press 1;

[0047] 3) Using a vibrating screen to separate the product obtained in step 2) into coarse aggregate and under-screen material;

[0048] 4) Using a conical cavity mill to crush the under-screen material obtained in step 3) to a particle size smaller than 5 mm;

[0049] 5) Use a vibrating screen to separate the product obtained in step 4) into fine aggregate and under-screen material. The particle size of the fine aggregate is greater than 1 mm, and the index meets the technical requirements of recycled fine aggregate for concrete and mortar (GB / T 25176) .

Embodiment 3

[0051] 1) Collect concrete waste in the concrete batching plant;

[0052] 2) The concrete waste slag is broken into blocks with a particle size of less than 30 mm by using a medium-pressure toothed roller press 1;

[0053] 3) Using a vibrating screen to separate the product obtained in step 2) into coarse aggregate and under-screen material;

[0054] 4) Using a conical cavity mill to crush the under-screen material obtained in step 3) to a particle size smaller than 5 mm;

[0055] 5) Use a vibrating screen to separate the product obtained in step 4) into fine aggregate and under-size material, and the under-size material will continue to be fed into the high-efficiency pulverizer to produce active ultra-fine powder products with a particle size of less than 0.025 mm, which can be used as concrete grinding Admixtures are used.

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Abstract

The invention discloses a production process for recycling premixed concrete solid waste residues. The production process comprises the following steps: S1. crushing the concrete solid waste residues into blocks with the grain diameters of 0-30 mm by adopting a toothed roll crusher; S2. screening the blocks with the grain diameters of 0-30 mm, and separating to form coarse aggregates with the grain diameters of 10-30 mm and screen underflow with the grain diameters of 0-10 mm; S3. stacking the coarse aggregates for storage, delivering the screen underflow with the grain diameters of 0-10 mm into a conical ball mill or an impact mill, and crushing into a mixture with the grain diameter of 0-5 mm; S4. screening the mixture, and separating to form fine aggregates with the grain diameters of 1-5 mm and screen underflow with the grain diameters of 0-1 mm; and S5. stacking the fine aggregates for storage, and delivering screen underflow with the grain diameters of 0-1 mm into an ultrafine mill, and milling into active ultrafine powder with the grain diameter of 0-0.025 mm. According to the production process disclosed by the invention, the separation efficiency and recovery rate of the coarse aggregates, the fine aggregates and the active ultrafine powder in the concrete solid waste residues can be improved, and meanwhile, the total energy consumption of the production process can be reduced.

Description

[0001] technical field [0002] The invention relates to the treatment technology of concrete waste residue, in particular to a recycling production process of ready-mixed concrete solid waste residue. Background technique [0003] According to statistics, at the end of 2012, there were 7,886 ready-mixed concrete production enterprises in the country, an increase of 1,334 compared with the end of the previous year; the designed production capacity was 4.803 billion cubic meters, the production of ready-mixed concrete was 1.645 billion cubic meters, and the waste generated was about 60 million tons. In the process of ready-mixed concrete production, due to equipment dead ends, process control and other reasons, concrete solid waste will inevitably be generated. The accumulation of waste slag to a certain extent will affect the normal operation and production of ready-mixed concrete enterprises, so the concrete solid waste slag must be cleaned regularly according to the produc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B18/16
CPCY02W30/91
Inventor 张瑞军潘志东王燕民乔强光
Owner 广东嘉阳工程材料有限公司
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