How does limestone and dolomite, the difference? To solve this problem, we must first know the different from the identification of dolomite and limestone features:
Limestone - a kind of calcite as the main component of carbonate rocks, often mixed with clay, silt and other impurities. Gray or gray, brittle, hardness is not, a knife can be engraved action, dripping hydrochloric acid will be severe blistering. Causes can be classified according to grain limestone, biological rock, chemical limestone. As easy to dissolution of limestone, so the growth in the limestone areas, often the formation of Stone Forest, the beautiful scenic caves. It is the burning of lime, cement raw materials, smelting iron and steel flux, the system of fertilizer, calcium carbide raw materials, is also widely used in confectionery, ceramics, alkali, glass, printing industry.
Limestone in the shallow water environment is mainly formed. Limestone can be divided into tablets by cause limestone debris (water transport, deposition formation); biological and chemical limestone skeleton, biochemistry limestone. Constructed according to the structure can be divided into bamboo limestone, limestone, agglomerate and limestone. The main chemical composition of limestone is easily dissolved CaCO3, it is more than limestone area in the formation of Stone Forest and the caves, known as karst topography, the clay mineral content of 25% to 50%, known as mudstone. Dolomite content of 25% to 50%, referred to as dolomitic limestone.
Dolomite Crusher - a kind of dolomite as the main component of carbonate rocks. Often mixed with calcite, clay minerals, gypsum and other impurities. Very similar appearance with the limestone, dripping hydrochloric acid (5%) very slow to weak or non-foam foam. Dolomite, dolomite powder and weathered face often knifed vertical and horizontal cross-shaped ditch solution, and more tough limestone. Dolomite by cause can be divided into primary dolomite, diagenetic dolomite and epigenetic dolomite, dolomite or explain the latter two said secondary dolomite. According to the structure can be divided into crystalline dolomite, the residual particles of alienation dolomite, detrital dolomite, microcrystalline dolomite and so on. Dolomite can be used in the metallurgical industry in flux, and refractories, as a flux in the blast furnace, some also used to extract magnesium metal; in the chemical industry for the manufacture of calcium magnesium phosphate, granular fertilizers, magnesium sulfate and so on. But can also do ceramics, glass, ingredients and building stone.
Identification of practice in the field of pure limestone dissolution is uniform, dissolution surface is very smooth and curved surface of the formation of many lots. The dissolution of dolomitic limestone surface is very smooth, lots of local dolomite calcite dissolution rate is less than the speed of the formation of uneven corrosion surface.
Field does not determine the quality of limestone and dolomite lime, generally drops by 5% of the fracture and dilute hydrochloric acid can be identified: pure limestone fracture is conchoidal, uneven fracture calcareous dolomite; with 5% fresh rock surface drops of dilute hydrochloric acid, limestone severe blistering, slightly sparkling gray dolomite.