Sand aggregate continuous grading production system for high-performance concrete and process

Abstract

The invention provides a gravel aggregate continuous grading production system for high-performance concrete and a process using the system. The system comprises a small stone bin, a large stone bin, an intermediate crushing unit, a material returning screen, a fine crushing unit, a grading screen, a transition material field, a powder removing unit and a sand bin, wherein the intermediate crushing unit, the material returning screen, the fine crushing unit and the grading screen are sequentially connected, and the transition material field, the powder removing unit and the sand bin are sequentially connected. An oversize outlet of the material returning screen is connected with an inlet of the intermediate crushing unit, an oversize outlet of the grading screen is connected with the large stone bin, a first outlet, a second outlet and a third outlet are formed below the grading screen, the first outlet and the second outlet are connected with the transition material field, the third outlet is connected with the small stone bin, and the small stone bin and the large stone bin are connected with an inlet of the fine crushing unit. According to the gravel aggregate continuous grading production system for high-performance concrete and the process using the system, the gradation of produced sand aggregate is continuously adjustable, the yield of the sand material for concrete can be fully adjusted, and the working condition of large fluctuation of the requirement of the sand aggregate in constructional engineering is met; and the feeding void ratio of the fine crushing unit is reduced, and the quality of the gravel aggregate is improved.

Description

technical field [0001] The invention relates to the technical field of artificial sand production, in particular to a continuous gradation production system and process of sand aggregates for high-performance concrete. Background technique [0002] In some construction projects, the demand for sand and gravel aggregates used in concrete fluctuates greatly. Even during the peak period of material consumption, the maximum monthly demand for concrete materials has reached 50,000 tons, compared with the average monthly demand of 30,000 tons during the peak period, the fluctuation exceeds 50%. In the peak period of material consumption, the raw material processing of the sand making crusher is close to full-load feeding, and it is difficult to increase the output by increasing the amount of feeding. At this time, it will inevitably affect the progress of the project. Even if the time for concrete materials to reach the maximum demand is relatively short, if the problem of insuff...

AI Technical Summary

Problems solved by technology

But this will cause a large area of ​​site occupation, serious erosion loss in rainy days, pollution to the soil, and long-term stacking will also have an adverse effect on the quality of sand materials

Moreover, due to the unpredictable amount and time of material fluctuations, even if more sand is produced during off-peak periods, there will still be insufficient supply or excessive storage when materials fluctuate, which may affect the construction period or waste materials

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