Sand aggregate is an indispensable raw material in infrastructure construction such as buildings, roads and bridges, and plays a role of skeleton and support. Since the second half of 20 18, the price of sand and gravel has been rising continuously due to a large shortage. From being out of stock, grabbing goods to having no goods to grab, sand and gravel aggregate has gradually become the focus of the infrastructure industry. China uses about 654.38+0.5 billion tons of aggregate for concrete every year, and with the consumption of asphalt concrete, railway ballast and water treatment, it is about 20 billion tons every year, accounting for about 50% of the world. As far as its dosage is concerned, sand aggregate is a huge industry, attracting people with keen insight to join in. On the whole, the sand and gravel industry is still in a tense period in the future, the demand exceeds the supply, and the dividend is still rising. It will be a good choice for investors to enter the sand and gravel industry.

The future sand and gravel aggregate industry is green, so many friends want to develop this market. But for friends who have just come into contact with the sand and gravel industry, their brains may be blank. Today, the small mine will popularize the knowledge and production technology related to sand and gravel aggregate for everyone.

What kind of stone is suitable for producing sand aggregate? Generally speaking, most stones can be used to process sand and gravel aggregates. At present, materials such as limestone, basalt, granite and river pebbles are widely used.

Where is the sand aggregate used? Sand aggregate is mainly used in engineering foundation, concrete, mortar and corresponding products. Is a major component of the infrastructure industry.

What are the specifications of sand and gravel aggregate? Sand aggregate is the general name of sand, gravel, crushed stone, block stone, aggregate stone and other materials in water conservancy projects. Aggregates with a particle size greater than 5mm are called coarse aggregates, that is, stones, and aggregates with a particle size less than 5mm are called fine aggregates, also called sand.

What is the production technology of sand and gravel aggregate?

Sand and gravel production line is very important in sand and gravel aggregate production technology. It determines the efficiency of the project and the quality of the finished product, and even affects the investment profit to some extent. The concrete production process of sand and gravel aggregate is as follows: large pieces of materials are evenly fed by a vibrating feeder through a silo and transported to a jaw crusher for coarse crushing; After being screened by vibrating screen, coarse crushing materials are transported by belt conveyor to impact crusher or cone crusher for medium crushing. After fine crushing, it is screened by a circular vibrating screen, and the materials with larger particles are sent back to the impact crusher/cone crusher for crushing again. The crushed materials are sent to a sand making machine for further crushing and molding. If clean materials are needed, they can be sent to a sand washer for cleaning. The equipment used mainly includes feeder, crushing equipment, sand making and molding equipment, screening equipment, etc. The sand and gravel aggregate processed by the whole production line can be sent to various engineering sites for use.