Natural sand is formed under certain natural conditions. Rock particles with a particle size of less than 5 mm are generally divided into river sand, lake sand, mountain sand, and sea sand. River sand is the most commonly used type. With the increasing shortage of natural sand such as river sand, the application of manufactured sand is becoming more and more widespread. During the construction of Baihetan Hydropower Station, which is second only to the Three Gorges Hydropower Station, machine-made sand was used extensively.

During the construction of Baihetan Hydropower Station, two sets of artificial aggregate processing systems with an output of over 1,000 tons per hour were established. Sand and gravel aggregates of different particle sizes were produced through European jaw crushers, single-cylinder hydraulic cone crushers, vertical impact crushers and other equipment, and were continuously transported to the construction site to build the strong body of the dam.

Machine-made sand can be used on a large scale in national-level large-scale projects, not only due to ecological and environmental protection requirements, but also because of the advantages of machine-made sand itself, which makes the performance of machine-made sand in actual application no less than that of natural sand.

The raw materials of machine-made sand usually include granite, basalt, river pebbles, limestone, construction solid waste, etc. Different raw materials have different parameter values ​​such as hardness and corrosion resistance. For example, granite is a rock with a high hardness coefficient, and limestone is a soft rock. Although the finished sand made from different raw materials will be different, overall machine-made sand still has great advantages:

1. Quality guaranteed

The sources of raw materials are fixed and produced on mechanized production lines. The particle shape and size can be adjusted and controlled as needed, ensuring stable product quality.

2. The finished product is of good quality

The content of impurities such as soil is small, it has high surface energy and hydrophilicity, and it has complete gradation.

3. Wide range of raw materials

It can be made from local materials, and can use various ore resources and even waste resources for production.

4. Price advantage

Judging from the quotations across the country, machine-made sand is about 20 yuan cheaper per ton than river sand. Among many types of machine-made sand, river pebble machine-made sand has excellent quality and is very popular among market users.

The main chemical component of river pebbles is silica, followed by a small amount of iron oxide and trace amounts of manganese, copper, aluminum, magnesium and other elements. The main characteristics of river pebbles are hard texture, pressure and wear resistance, and stable chemical properties.

During the sand production process, river pebbles contain relatively little stone powder, the material is stable, and the quality of the finished product can be well controlled. Therefore, the machine-made sand processed from river pebbles has excellent quality and is widely used in the construction of water conservancy and hydropower, highways, high-speed railways, bridges, airport runways, high-rise buildings, etc. in the engineering field.

Next, we will take the river pebble sand making production line as an example to briefly introduce the relevant configuration.

1. Vibrating feeder for feeding materials

The feeder is an important auxiliary equipment in the sand making production line. The feeder is generally placed at the front of the European jaw crusher and directly feeds the materials into the European jaw crusher for crushing.

Dinghuang Heavy Industry's DH1562 rod vibrating feeder has a vibration intensity of up to 4.5G, a maximum feeding particle size of 1500mm, and a maximum feeding capacity of 2000 tons/hour, fully ensuring the reliability of feeding.

2. European version jaw crusher for front-end crushing

The European version of the jaw crusher has a strong crushing capacity and is used in the first step of crushing, including crushing hard materials such as river pebbles. It is an important component of the production line.

Dinghuang Heavy Industry's C series European jaw crusher has a large crushing ratio and high output. It has many unique designs. The deep V-shaped crushing cavity allows materials to enter the crushing cavity without hindrance and improves the feeding capacity. The motor and crusher are integrated, making the whole machine small in size and saving working space. The bolted frame avoids the risk of stress concentration and improves the convenience of transportation.

3. Single-cylinder hydraulic cone crusher for fine crushing

The single-cylinder hydraulic cone crusher can be used to crush various hard materials, such as river pebbles, granite, and basalt, which are hard and commonly used sand-making raw materials. The single-cylinder hydraulic cone crusher has good wear resistance and the finished product has an ideal particle shape.

Dinghuang Heavy Industry's GP series single-cylinder hydraulic cone crusher is an ideal fine crushing equipment with the advantages of low cost and high performance, constant feeding capacity, large production volume, high yield, long liner service life and low operating cost.

4. Vertical impact sand making machine for sand making

Vertical impact sand making machine is a type of sand making machine that is currently widely used. The impact sand making machine adopts the crushing principle of stone on stone and stone on iron. It has high production efficiency, good wear resistance of internal wearing parts, durability and low maintenance cost.

Dinghuang Heavy Industry's DH1380 impact sand making machine integrates multiple crushing modes and is the core equipment of the sand making industry. The "peripheral feeding + center feeding" production mode can obtain good product particle shape and gradation, and the "center feeding" production mode can make the crushing efficiency higher and the crushing ratio larger.

5. Thin oil maintenance-free circular vibrating screen for screening materials

Thin oil maintenance-free circular vibrating screen can screen various materials and screen out materials of different particle sizes. In a closed-circulation production line, materials that meet the particle size requirements enter the next production link, and materials that do not meet the requirements are returned to the previous link through the conveyor for further processing.

Dinghuang Heavy Industry's YKR series thin oil maintenance-free circular vibrating screen adopts high-strength plates, which can adapt to vibration intensity up to 3.5G, effectively reducing material clogging, significantly improving screening performance, large throughput and high screening efficiency.

6. Use sand washing machine to remove impurities

The sand washing machine is used at the end of the sand making production line to remove dirt and other impurities mixed in the machine-made sand. After the sand washing process, it ensures that the machine-made sand meets the standards for use.

Dinghuang Heavy Industry's sand washing machine has excellent overall performance, reasonable structure, and saves space. It can reduce the loss of fine sand during operation and achieve good cleaning effects. The finished sand is of high quality, less soil content, cleaner, and more in line with construction sand standards.

The above are the main equipment for building a river pebble sand making production line. The specific models to be configured need to be reasonably configured by the customer based on production capacity scale, site conditions, finished product particle size and other requirements.

Of course, the design of the river pebble sand production line should also follow a series of specifications, involving many aspects such as site selection, building structure, water supply and drainage, etc.

Factory site selection

It should be far away from residential areas, choose the downwind side of the dominant wind direction, and be close to existing transportation lines, water sources, and power sources to achieve environmental protection and convenience in production.

building structure

On the premise of meeting production requirements, arrange it in the open air as much as possible, and pay attention to ventilation, heat dissipation, sound insulation, fire prevention, explosion protection, etc. in the production workshop to ensure efficient and safe production.

Water supply and drainage

Mainly consider water for spray dust removal, water for sand and gravel washing, domestic water, and fire-fighting water during production. Pay attention to the diversion of rainwater and production and domestic wastewater.

It can be said that there are many factors to consider in building a river pebble sand making production line, which is relatively complicated. However, Dinghuang Heavy Industry has a large number of successful case experiences. It provides river pebble sand making equipment and production line solutions to domestic and foreign users all year round. It also supports tailor-made, full installation accompanying, long-term after-sales and other services. Customers across the country are welcome to consult at any time or visit the factory!