Granite is an intrusive igneous rock which is widely distributed throughout Earth’s crust at a range of depths up to 31 mi (50 km). Granite’s characteristic grainy structure and strength is the result of many individual crystalline structures which form tightly together as magma slowly cools within large, deeply buried rock bodies known as plutons.
Granite Quarrying Operations
Extraction (more commonly referred to as quarrying) consists of removing blocks or pieces of stone from an identified and unearthed geologic deposit. Differences in the particular quarrying techniques used often stems from variations in the physical properties of the deposit itself—such as density, fracturing/bedding planes, and depth—financial considerations, and the site owner’s preference. Nevertheless, the process is relatively simple: locate or create (minimal) breaks in the stone, remove the stone using heavy machinery, secure the stone on a vehicle for transport, and move the material to storage.
The first step in quarrying is to gain access to the granite deposit. This is achieved by removing the layer of earth, vegetation, and rock unsuitable for product—collectively referred to as overburden—with heavy equipment and transferring to onsite storage for potential use in later reclamation of the site. After the face of the granite is exposed, the stone is removed from the quarry in benches, usually 8 to 12 feet square extending 20 feet or more using a variety of techniques suitable to the geology and characteristics of the granite deposit. Quarrying operations typically include the drilling of holes along the perimeter of the bench, followed by either cutting the stone out of the deposit using saws equipped with diamond wire, or by splitting the stone using hydraulic splitters or small explosive charges. Once the bench is cut or split loose from the deposit, heavy equipment is used to lift the granite bench and transfer it to an inspection area for grading, temporary storage, occasional preprocessing into slabs, and eventual shipment from the site. Granite of insufficient quality or size for current demand is stored on-site for future use, crushed for use in paving and construction applications, or stored for future site reclamation activities.
Granite Quarrying Equipment
For the common application of granite, we know that it is necessary to crush or grind granite into small size so it can be applied to use. During this process, we need granite crushing equipment, grinding equipment, screening equipment, washing equipments etc.
In the granite quarry plant, granite crusher is important equipment which used for primary crushing process. As the experienced manufacture, we recommends you to choose jaw crusher, hydraulic impact crusher, or mobile jaw crusher as the primary crusher equipments. Our granite quarry crusher with easy structure and operation can work with high repaid and high output capacity.
Granite mill is usually used in second grinding stage in granite quarry plants. We should select different quarry milling equipments depend on the feeding size and finished size of granite materials. We would provide you the reliable and suitable grinding machine, such as Ball mill, vertical mill, trapezium mill, etc.