The Process Of Producing Sand And Gravel Aggregates

1.What is sand and gravel aggregate?

Sand and gravel aggregate is a general term for materials such as sand, pebbles (gravel), crushed stone, block stone, and material stone in water conservancy projects. Sand and gravel aggregate is the main building material for structures such as concrete and stacked stone in water conservancy projects. Aggregates with a particle size greater than 5mm are called coarse aggregates, which we often call gravel, and aggregates with a particle size less than 5mm are called fine aggregates, also known as sand. Sand and gravel are the main building materials for structures such as concrete and stacked stone in water conservancy projects. It can be divided into natural rock aggregates and artificially recycled aggregates, as follows:

1-1. Natural rock aggregates are aggregates composed of natural rocks, such as sand, pebbles, crushed stones, etc.

1-2. Artificially recycled aggregates are recycled materials obtained by crushing concrete, clay bricks and industrial by-products such as slag, iron slag and slag powder.

2. What are machines for sand and gravel aggregate production line?

2-1. Feeding system: Generally, vibrating feeder equipment is used to feed stones evenly;

2-2. Conveying system: There are belt conveyors or plate conveyors, etc.;

2-3. Crushing system: The heart of the whole set of equipment, composed of multiple crushers(jaw crusher, impact crusher, cone crusher, Vertical shaft impact crusher, hammer crusher, double roller crusher ) crushing various ore raw materials into waste materials of required particle size;

2-4. Screening system: screening equipment such as circular vibrating screen or linear vibrating screen.

3. Detailed production process of sand and gravel aggregate production line

1. Primary crushing of stones:

Materials smaller than 150mm do not need to be crushed, and fall directly onto the belt and enter the primary yard; materials larger than 150mm are crushed by jaw crusher (discharge port 150mm), and the crushed materials enter the primary yard.

2. Stone secondary crushing:

After the coarse crushing, the stone reaches the secondary crusher, which can be crushed by impact crusher or cone crusher. The stone larger than 31.5mm enters the secondary crusher for crushing, and the material smaller than 31.5mm is screened into three specifications: 0-5mm, 5-13mm and 13-31.5mm.

3. Sand making and screening link:

The raw materials for sand making are mainly 0-5mm, 5-13mm and part of 13-31.5mm mixed materials, which enter the sand making machine for crushing and sand making, and enter the three-layer vibrating screen through belt transportation. The materials larger than 5mm return to the sand making machine for further crushing (can also be sold as finely processed stones), and the rest of the materials are divided into 3-5mm and less than 3mm.

The specific production equipment solution to be selected still needs to be determined according to the actual production raw materials and output size of the customer. Baichy Machinery has a history of more than 20 years. It not only produces a full set of crushing and sand making equipment, but also provides EPC project general contracting services, including plant site selection and construction, production line design and installation, and production and operation technical training. Welcome to consult online to get your exclusive stone crushing plant solution.