Products that Stone Quarries Produce
Products that Stone Quarries Typically Produce
Products that stone quarries produce will be discussed here. Plans for quarrying must include all operational aspects of mining. This includes overburden and mineral handling, storage, haul road placement, volumes involved, equipment selection, reclamation and economics. Consideration must be given to annual production; physical, environmental and permitting restrictions limits of mining, ultimate depth and etc. Desired benching configuration; location of the groundwater table and other impacting factors are also important.
The importance of all these factors being designed appropriately goes beyond the boundary of the quarry and the cost of production. For example, inaccurate calculation of the size of machinery required can easily lead to benches. The benches are being worked in the order that the material is most easily won rather than the optimum for consistent quality of raw material. Once material is removed from the quarry face it begins its journey to the raw plant. And then to the factory and the customer. If an adequate block model is known before it is dispatched from the face, then all the tasks further down the line will be easier. Comparing to the situation that material is of unknown composition until the raw meal for the cement kiln has been made.
What Do Quarries Produce?
Quarries principally produce sand and gravel and crushed rock for construction. These materials are usually described as aggregates. Some materials produced by quarries includes Gypsum, Salt, Potash, Coal, Chemical grade Limestone, Common Clays, China Clay, Kaolin, Ball Clays, Silica Sand. Thus, quarries are often associated with process plants. The most important of these process plants are ready-mixed-concrete plants, coating plants to produce asphalt and bituminous road-making materials, cement and lime burning kilns, concrete block and pipe works, brick works, pottery works and plaster factories.
Quarry Products
A stone quarry typically produces the following products:
- Large size blocks blasted from the quarry face, from approximately 0.5 m3(approximately 0.36 tonne weight) to 1.25 m3 (approximately 5-6 tonne weight), are called rip rap or rock armour and are used in coastal and river flood defence schemes to shore up sea fronts and river banks.
- Rubble drawn direct from the shot pile is called face fill and is used as large scale fill on construction sites.
- Material screened immediately prior to primary crushing is called scalpings or grizzly which is again used as fill on construction sites.
And More…
- The direct, unscreened output from a crusher contains a complete mix of sizes from dust up to the maximum size that the crusher can pass. Output from the primary and secondary crushers is fed, unscreened, to intermediate or separate stockpiles. Materials drawn from these stockpiles is called crusher run and is used for construction fill.
- Screened out fine material from the secondary crusher is called blinding. Some screens have multiple decks. They can screen out several grades of blinding. As with crusher run, blinding materials contain a mix of sizes. These starts from the maximum size that the screen mesh can pass, down to dust. Blinding, because it is finer than crusher run, is used for final shaping up of construction sub bases. It is used particularly in road construction, where the sub base is the last unbound layer before coated materials are laid.
- Screened aggregate (ballast) for concrete
- 32/50 is used for railway ballast and as filter media in water treatment plants (if the rock type is tough enough).
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Sources
www.sciencedirect.com/topics/engineering/quarrying
www.quarrying.org/about-quarrying/quarrying explained#:~:text=Quarrying%20is%20the%20process%20of,earth%20where%20minerals%20are%20extracted
https://www.northstonematerials.com/quarrying_process_and_quarry_products#:~:text=Stone%20quarrying%20is%20the%20multistage,macadam%20(bitmac)%20or%20asphalt
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