The chemical composition of basalt is similar to that of gabbro or gabbro, with SiO2 content varying between 45% and 52%, K2O+Na2O content slightly higher than that of intrusive rocks, and CaO, Fe2O3+FeO, MgO content slightly lower than that of intrusive rocks. The bulk density of basalt is 2.8~3.3g/cm3, and the compression strength of the dense one is very high, which can be as high as 300MPa.

The main components of basalt is silicon dioxide, aluminium oxide, iron oxide, calcium oxide, magnesium oxide, a small amount of potassium oxide, sodium oxide, of which silicon dioxide content is the most, accounting for about 45% to 50% or so.

Basalt durability is very high, more joints, and the joints are mostly pentagonal or hexagonal, constituting columnar joints. It is brittle, so it is not easy to quarry large stones. In addition, basalt slurry viscosity is small, fluidity. The colour of basalt is commonly black, black-brown or dark green. Because of its dense texture, its specific gravity is heavier than normal rocks.

Basalt has a wide range of uses, and its application is not only limited to the construction industry, such as basalt is the production of "cast stone" good raw materials, its melting casting, crystallisation, annealing and other processes; can be in a cast steel maturation process, play the role of "lubricant", which can be a long casting film life.

Basalt is a good aggregate for lightweight concrete in high-rise buildings, abrasive materials, can be used to grind metal, grinding stone; in the industry can also do filters. At the same time is also widely used in landscaping, mainly used as rockery, bonsai, etc., but also for home decoration. It is also suitable for outdoor landscape construction, especially the better choice of paving stone.

Basalt processing process

Natural basalt is not widely used. But after processing, it can increase the value and scope. When basalt goes through the three major processes of crushing, sand making and grinding. Each of these three processes improves basalt utilisation.

In the crushing process, to find the right crushing equipment, can be basalt crushing size uniformity of the block degree, after packaging best-selling in various industries, in the recommendation of the jaw crusher, the machine's overall performance and the hardness of basalt, density coincides with the machine, can play a higher crushing force.

In the sand making ring process, the main basalt material is made into sand, can be used in sand making machine or impact crusher, these two equipment sand making basalt sand widely replace the natural sand.

In the grinding process, the main use of grinding machine, such as Raymond mill, high strength mill and so on. It is to make basalt into powder. Although this process uses more equipment, but the output of the product, its price is higher and essence.

Related equipment

Jaw Crusher