Composition and uses of river pebbles
How river pebbles are formed
River pebble is a kind of pure natural stone, which is taken from the gravel mountain produced by the uplift of the ancient river bed after the crustal movement thousands of years ago. In the course of tens of thousands of years of vicissitudes of evolution, they have experienced the movement of waves and water, lost their irregular edges and corners due to the collision and friction of gravel, and have been buried deep underground for millions of years in silence.
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 and compounds. They themselves have different pigments, such as red for iron, blue for copper, purple for manganese, yellow translucent for silica colloidal chalcedony, emerald with green minerals, etc.; The types and contents of the silicon hydrothermal fluid are different, so it presents a variety of shades and shades, making the 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 are gathered on the river pebbles. The pebbles should account for more than half of the volume. Because of their wide distribution, common and beautiful appearance, they become ideal for courtyards, roads and building construction stones. choose.
River pebble uses
River pebble is a kind of silicate mineral with hard texture, wear resistance and stable chemical properties. industrial mineral raw materials. It is widely used in the field of water conservancy and hydropower, high-grade highways, expressways, high-speed railways, passenger dedicated lines, bridges, airport runways, municipal engineering, high-rise building sand production and stone shaping.
River pebble sand production line