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. Among them, river sand is the most used one.
With the increasing shortage of natural sand such as river sand, the application of machine-made sand is becoming more and more extensive. During the construction of Baihetan Hydropower Station, which is second only to the Three Gorges Hydropower Station, machine-made sand was used in large quantities.
Baihetan Hydropower Station
During the construction of Baihetan Hydropower Station, two sets of artificial aggregate processing systems with an output of over 1,000 tons per hour have been established successively. Through jaw crusher, cone crusher, impact crusher and other equipment, sand with different particle sizes is produced. Stone aggregates are continuously transported to the construction site to build the solid body of the dam.
Machine-made sand can be used on a large scale in large-scale national projects, not only because of the requirements of ecological environmental protection, but also because of the advantages of machine-made sand itself, which makes the performance of machine-made sand in practical applications not inferior to natural ones. sand.
granite
The raw materials of machine-made sand usually include granite, basalt, river pebble, limestone, construction solid waste, etc. Different raw materials have different parameters such as hardness and corrosion resistance. For example, granite is a rock with a higher hardness coefficient, and limestone is a softer rock. Although the finished sand made of different raw materials will be different, on the whole, machine-made sand still has great advantages:
1. The quality is guaranteed
The source of raw materials is fixed, the production line is mechanized, and the particle size can be adjusted and controlled according to the needs, which ensures the stable quality of the product.
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 a complete gradation.
3. Wide range of raw materials
Materials can be obtained locally, and various ore resources and even waste resources can be used for production.
4. The price has an advantage
According to the quotations from all over 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 is of high quality and is very popular among market users.
River Pebble
The main chemical composition of river pebble is silicon dioxide, followed by a small amount of iron oxide and trace amounts of manganese, copper, aluminum, magnesium and other elements. The main characteristics of river pebble are hard texture, compression and wear resistance, and stable chemical properties.
In the process of sand making, the content of stone powder is relatively small, the material is stable, and the quality of the finished product can be well controlled. Therefore, the machine-made sand made from river pebbles is of excellent quality and is widely used in water conservancy and hydropower engineering in the field of engineering. , highways, high-speed railways, bridges, airport runways, high-rise buildings and so on.
Next, take the river pebble sand production line as an example to briefly introduce the relevant configuration.
01. Vibrating feeder for feeding
The feeder is an important auxiliary equipment in the sand making production line. The feeder is generally placed at the front end of the jaw crusher and directly sends the material into the jaw crusher for crushing.
Bellian's HSF series rod vibrating feeder has a vibration intensity of up to 4.5G, a maximum feeding particle size of 1500mm, and a maximum feeding volume of 2000 tons/hour, which fully guarantees the reliability of feeding.
02. Jaw crusher for front-end crushing
The jaw crusher has a strong crushing ability and is used in the first step of crushing, and it is not a problem to crush hard materials such as river pebbles. It is the main part of the production line.
Bellian's CJ series jaw crusher has a large crushing ratio and high output, and has many unique designs. The deep V-shaped crushing cavity allows the material to enter the crushing cavity without hindrance and improves the feeding capacity; the motor and the crusher are integrated design, the whole machine Small size, saving working space; using bolted frame to avoid the risk of stress concentration and improve the convenience of transportation.
03. Cone crusher for fine crushing
Cone crusher can be used for the crushing of various hard materials, such as river pebble, granite, basalt and other hard and commonly used sand making raw materials. The cone crusher has good wear resistance and ideal finished particle shape.
Bellian Machine's SC series horizontal bar hydraulic cone crusher is an ideal fine crushing equipment with the advantages of low cost, high performance, constant feed capacity, high throughput, high yield, long liner life and low operating costs.
04. Impact Sand Making Machine for sand making
Impact sand making machine is a type of sand making machine that is widely used at present. The impact sand making machine adopts the crushing principle of stone-on-stone and stone-on-iron, with high production efficiency, good wear resistance of internal wearing parts, durability and low maintenance cost.
Bellian's HVI series impact sand making machine integrates a variety of crushing modes and is the core equipment in the sand making industry. The "feed" production mode can make the crushing efficiency higher and the crushing ratio larger.
05. Vibrating screen for screening materials
The vibrating screen can sieve various materials and screen out materials of different particle sizes. In the closed-circuit production line, the materials that meet the particle size requirements enter the next production link, and those that do not meet the requirements are returned to the previous link through the conveyor. processing.
BLAX series vibrating screen
The BLAX series vibrating screen of Bellian machine adopts high-strength plate, which can adapt to the vibration intensity up to 3.5G, effectively reducing the phenomenon of material clogging, significantly improving the screening performance, with large throughput and high screening efficiency.
06. Sand washing machine for removing impurities
The sand washing machine is used at the end of the sand production line to remove impurities such as soil mixed in the machine-made sand. After the sand washing process, the machine-made sand can meet the standard of use.
The sand washing machine of Bellian machine has excellent overall performance, reasonable structure and space saving. It can reduce the loss of fine sand during operation and achieve a good cleaning effect. .
The above is the main equipment for building the river pebble sand production line. Which models are configured, it is also necessary for the customer to make a reasonable configuration according to the requirements of the production capacity scale, site conditions, and finished product particle size.
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.
Site selection
It should be far away from residential areas, and choose to be on the downwind side of the dominant wind direction, close to the existing transportation lines, water sources, and power sources, so as to achieve environmental protection and convenience in production.
building structure
On the premise of meeting the production requirements, it should be arranged in the open air as much as possible, and attention should be paid to the ventilation, heat dissipation, sound insulation, fire prevention, explosion-proof, etc. of the production workshop to ensure efficient and safe production.
Drainage
Mainly consider the water for spray dust removal, water for sand and gravel washing, domestic water, and fire-fighting water during production, and pay attention to the diversion of rainwater and production and domestic wastewater.
It can be said that there are many factors to be considered in the construction of a river pebble sand making production line, which is relatively complicated, but Bellian machines have a large number of successful case experiences, and provide river pebble sand making equipment and production line solutions for domestic and foreign users all year round, and also support tailor-made, whole process. Accompanying installation, long-term after-sales and other services, customers across the country are welcome to consult or visit the factory at any time!
