How to produce sand and gravel aggregates for highway construction

Highway construction is a complex and important project, and sand and gravel aggregates are one of the indispensable materials in highway construction. The production of sand and gravel aggregates is the premise and foundation of highway construction. The following will introduce the production process and main equipment of sand and gravel aggregates.

The production process of sand and gravel aggregates usually includes the following steps:

1. Raw material mining: First, sand and gravel raw materials need to be mined in the mining area. The raw materials can be obtained from riverbeds, mountains or quarries. The mining process needs to comply with relevant environmental protection laws and mining rights permits.

2. Raw material crushing: The excavated raw materials are crushed. Commonly used equipment is jaw crusher, impact crusher or cone crusher. The crushed raw materials will be divided into different particle sizes.

3. Screening and washing: The crushed raw materials need to be screened and washed to remove impurities and dust and separate aggregates of different particle sizes. The screening equipment can be a vibrating screen, a rotary screen, etc. The washing equipment can be a spiral sand washer, a stone washer, etc.

4. Finished aggregate storage: After screening and washing, the aggregate will be stored in the finished aggregate bin. Finished aggregate is classified and stored according to different particle sizes for subsequent use.

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