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The actual extraction of limestone is made by separating the rock in quarry ledges and dividing it into blocks. Here is an overview of Vetter's Stones extraction process: The overburden, or the material above the stone that is set to be harvested, is lightly blasted and removed.
Limestone is usually a biological sedimentary rock, forming from the accumulation of shell, coral, algal, fecal, and other organic debris. It can also form by chemical sedimentary processes, such as the precipitation of calcium carbonate from lake or ocean water.
The process starts with the quarrying of limestone or chalk which is then crushed, cleaned, sorted and graded as kiln feed stone which is around fist size. The remaining smaller stone, not suited by size to be used in the kilns, can be further processed and sold to various markets.
Process flow diagram for limestone processing operations. Processing commences with transportation of the (raw) stone from the quarry to the processing facility, as depicted by Figure 2.
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. A flow diagram of typical quarrying operations is shown in Figure 1. Overburden Removal. Extraction.
Formation Process of Limestone. Limestone is a sedimentary rock that forms through a complex process that involves the accumulation and compaction of calcium carbonate-rich materials over millions of years. The primary process of limestone formation can be summarized as follows:
Processed stone is transported by conveyor belt to the lime kilns. To cook or "calcine" limestone, there must be a significant transfer of heat to the limestone. In general, the heat transfer from the fuel source to limestone can be divided into two stages:
The whole process of making any type of lime all begins at the limestone quarry after careful surveys. Most limestone is extracted through blasting. Behind the rock face, holes are drilled to place the explosives. When detonated, the explosion dislodges each time up to 30,000 tonnes of stone.
As shown in Figure 1, the first step in quarrying is to gain access to the limestone deposit. This is achieved by removing the layer of earth, vegetation, and rock unsuitable for product—collectively referred to as overburden—with heavy equipment that is sometimes coupled with small explosive charges.
The lime cycle shows the stages from quarrying the limestone through to the production of mortars and plasters for our buildings and how it slowly, through the re-absorption of Carbon Dioxide, reverts to its original chemical form (Calcium Carbonate) in the wall.