The technology of artificial sand making is becoming more and more mature, and the range of alternative raw materials has also expanded from various non-metallic ores to pebbles, construction waste, tailings, etc. Among them, the applicability of pebble machine-made sand and whether it can replace river sand The debate has never stopped, and it is necessary to correctly understand the characteristics of the material and the difference between the two before making a judgment.
 

What are the characteristics of pebbles?

Pebble is actually a general term, which means naturally formed non-angular rock particles that can form conglomerate, which are divided into river pebbles, sea pebbles and mountain pebbles. Most of the pebbles are round in shape and smooth in surface. They are characterized by their hard texture, abundant resources, and easy mining, etc., and the processed machine-made sand is of good quality.

Although pebbles also belong to the category of pebbles, they are different from river pebbles in particle size and appearance. River pebbles are oval stones deposited in the river, with a particle size of more than 50 cm. The process is processed into machine-made sand; the shape and size of pebbles are like cobblestones, and the particle size is generally below 50 cm. Basically, only about two processes are needed to make sand.
 

Can pebble machine-made sand be used as river sand?

Yes, as long as it is processed through a reasonable process, the pebble machine-made sand can fully meet the standards of complete grain shape, uniform grain size, and mud content ≤ 5%, that is, it can be configured with concrete like river sand and used in construction, roads, railways, etc. field. details as follows:

natural river sand
The natural river sand has been eroded for many years, and the particles are round and have good water absorption. The concrete made of river sand has good fluidity, which is beneficial to the pumping of concrete. However, river sand is often mostly fine sand, and medium sand and coarse sand need to be added to adjust the gradation;

pebble mechanism sand
Pebble machine-made sand can strictly control the soil and other components in the material to ensure its quality, and the grain shape is mostly polygonal, with a larger specific surface area, which is convenient for the bonding of cement and additives, and is conducive to improving the strength of concrete.

The difference between pebble mechanism sand and river sand

Production cycle:
River sand is formed under a series of forces such as the impact, erosion, and transportation of river water. It is not easy to form without years of accumulation, so the formation time is relatively long, and the amount of mining is also limited.
Pebble machine-made sand only needs to feed the raw materials into the crushing and sand-making main machine through forklifts, feeders and other feeding equipment, and then the finished machine-made sand can be separated through vibrating screens and other screening equipment. In comparison, the production cycle is relatively short. short.

Acquisition cost:
The cost of river sand is mainly sand mining equipment, various taxes and staff wages, etc., which are about 20 yuan per ton. However, due to the restrictions on mining, the mining rights of the river are much higher;
In addition to the cost of equipment, taxes, and labor, pebble machine-made sand also has the cost of raw materials and mining. The total cost is about 30-40 yuan per ton. The advantage is that the cost of contracted mining rights will not be particularly high.
 

Which equipment should be used for processing pebbles?

The key parts of the jaw crusher are made of high manganese steel, and the special flywheel design and extrusion operation principle make it easy to process various materials, which is very suitable for coarse crushing of pebbles (one-stage crushing);

The cone crusher adopts the principle of laminated crushing, and is an ideal secondary crushing equipment for processing high-hard materials, and its crushing wall, rolling mortar wall, lining plate and other vulnerable parts are also made of manganese steel, and the service life can be as long as about 6 months ;

When crushing high-hard materials such as pebbles and basalt, the sand making machine can selectively adopt the "rock-on-rock" operation method. The material can be crushed before it collides with the material, which can not only ensure the output but also reduce consumption. fine.

Pebble production line

Configure device
Jaw Crusher + Cone Crusher + Impact Sand Making Machine + Sand Washing Machine, etc.

Work flow
The pebbles enter the jaw crusher through the feeder to start the first stage of crushing, and then are transported by the conveyor to the cone crusher for secondary crushing until the particle size is less than 5 cm before being sent to the sand making machine. After the vibrating screen distinguishes the specifications, the sand is washed The machine is responsible for cleaning and finishing operations.

Program Features
The crushing efficiency is high, and the output range can be as high as about 500 tons. Users can also produce stones according to their needs. There are many specifications of finished products and higher comprehensive benefits.