River pebble is a kind of pure natural stone. It is taken from the sandy and gravel mountains produced by the uplift of the ancient riverbed after the crustal movement of the earth thousands of years ago. It has experienced the impact of flash floods and the continuous extrusion and friction during the transportation of flowing water. During the evolution of tens of thousands of years of vicissitudes, they have been swept by the movement of waves and water, lost their irregular edges and corners by the collision and friction of gravel, and were buried deep in the ground together with the sediment for millions of years.
The main chemical composition of river pebbles is silica, followed by a small amount of iron oxide and trace amounts of manganese, copper, aluminum, magnesium and other elements and compounds. They themselves have different pigments, such as red for iron, blue for copper, purple for manganese, yellow translucent for silica colloidal stone pith, jadeite color contains green minerals, etc.; due to the different types and contents of these pigment ions dissolved into the silica hydrothermal solution, they show thousands of colors in shades and shades, making river pebbles appear black, white, yellow, red, dark green, blue gray and other colors. There are many river pebbles near the Haihe River. Black sand grains gather on the river pebbles. The pebbles should account for more than half of the volume. Because of their wide distribution, relatively common, and beautiful appearance, they have become an ideal choice for courtyard, road, and building construction stones.
Cobblestone is a by-product of yellow sand mining. It is a pure natural stone. The main component is silica, and it also contains a small amount of iron oxide and trace amounts of manganese, copper, aluminum and other elements and compounds. It is widely used in construction and road construction and other industries, mainly including public buildings, courtyard buildings, pavement, park rockeries, bonsai filling materials, cobblestone materials, garden art and other high-grade superstructures. Cobblestone is an auxiliary material in the fields of ceramics, precision casting, papermaking, spray grinding, chemical industry, monocrystalline silicon, etc. It also provides high-quality materials for water purification, sewage treatment, electric power, gardens and other projects.
Cobblestone has high hardness, but the highest silicon content. Therefore, the crushing process of cobblestone should be designed reasonably, and the production cost of the production line must be considered while considering the investment cost of the crushing project. In the crushing operation where the raw material is cobblestone, the loss of wear-resistant parts such as jaw plate, plate hammer and counterattack plate is very high. Therefore, in the design of the crushing process, the crushing equipment with the principle of lamination should be selected as much as possible to reduce the loss of wear-resistant parts. The typical lamination equipment configuration is the process configuration of two-stage jaw crushing or jaw crushing plus cone crushing.
If the customer does not have high requirements for the grain shape of the finished stone, the two-stage jaw-breaking solution can be used for production. This configuration is the solution with the lowest investment, the easiest maintenance and maintenance, and the production cost is also the most economical of all solutions. However, the disadvantage of this solution is that the grain shape of the stone is relatively poor, and the proportion of needle-flake materials is high. Stone is not very competitive in the market, because high-grade buildings require stone with excellent grain shape. If the customer has high requirements for the final stone grain shape, another counterattack crusher can be configured for integer crushing, thus forming a three-stage crushing process configuration. The specific process configuration needs to be analyzed according to the actual situation on site. Welcome to visit and exchange.