The ultimate objective of space industrialization is to create a growing economy in space which can eventually become self-sufficient. Space industry is presently supported by sales of goods with extremely high intrinsic values, such as satellites for communications, research, navigation and reconnaissance.
Since the beginning of civilization, people have used stone, ceramics and, later, metals found close to the Earth's surface. These were used to make early tools and weapons; for example, high quality flint found in northern France, southern England and Poland was used to create flint tools.
A crusher is a machine designed to reduce large rocks into smaller rocks, gravel, or rock dust.. Crushers may be used to reduce the size, or change the form, of waste materials so they can be more easily disposed of or recycled, or to reduce the size of a solid mix of raw materials (as in rock ore), so that pieces of different composition can be differentiated.
A world leader in mining equipment and rock excavation. Our constantly evolving offering for mining and rock excavation covers rock drilling, rock cutting, crushing and screening, loading and hauling, tunneling, quarrying and breaking and demolition.
Mosthealth hazards are associated with long-term exposure to certain substances or to excessive noise levels or vibrations. Certain types of wood dust, for example, can cause allergic reactions, and saw dust has been determined to be a group A carcinogen by the International Agency for Research on Cancer (IARC).
What is Silica Dust? Silica dust is made of very fine particles of quartz, which is a very common mineral. It's one of the most common elements on the planet and found in a wide variety of manufactured and natural materials such as sand, brick, masonry, clay products, mortar, rock, concrete, gravel, granite, slate, sandstone, glass, and more.