The unique thermal mechanism of dolomite makes it a good refractory material---dolomite sand

Dolomite sand can be used as a refractory material because of its good low temperature resistance and undisturbed thermal properties, and dolomite has also attracted the attention of the steel industry. Since dolomite contains free calcium oxide, which also has the effect of polluting molten steel, dolomite has become the focus of many steel industries. Now, please listen to the dolomite manufacturers to share their characteristics with you.

 In ceramic production, dolomite powder is used in blanks and glazes, and calcium oxide and magnesium oxide are introduced instead of talc and calcite. The function of magnesium oxide is to change the composition of the mixture system, thereby reducing the firing temperature of the embryo; to promote the ablation of quartz and the formation of mullite, increase the amount of quartz and reduce the amount of feldspar, thereby increasing the transparency of the embryo. In glaze speculation, dolomite powder and limestone are mixed into dolomite-limestone inclusions, which can be used to prepare anorthite and diopside-wollastonite clinkers for use with quick-fired porcelain. This clinker costs less than separately decomposed calcium-magnesium compounds in the manufacture of wall tiles and refined bricks.

 dolomite sand

 Dolomite is widely used. Used for glass, chemical industry, enamel, welding materials, curing, refractory materials, dolomite powder (double fly powder) architectural coatings, ultra-fine double fly powder is an auxiliary material for plastic steel. The chemical composition is CaMg[CO3]2, and the crystal belongs to the trigonal carbonate mineral. The crystal layout of dolomite is the same as that of calcite. The crystal form is rhombohedral, and the crystal face is often curved into a saddle shape. Twin crystal clusters are common, mostly in the form of massive and granular agglomerates. Pure dolomite is red, occasionally gray-green, gray-yellow, pink and other colors due to residual elements and impurities, and has a vitreous luster. The three groups of rhombohedrons are completely cleavage and are brittle. Mohs hardness 3.5-4, specific gravity 2.8-2.9. Mineral powder reacts slowly in cold dilute hydrochloric acid. Distinguishing characteristics: It can be distinguished from similar calcites by the characteristics of higher hardness and slower reaction in cold dilute hydrochloric acid. Dolomite is an important mineral component of dolomite and dolomitic limestone. Dolomite can be used as metallurgical flux, refractory materials, building materials and ingredients for glass and ceramics.

 Prevent the generation of overfired lime and underfired lime. Fused magnesia calcium sand

 The dolomite whose main component is calcium carbonate is calcined at an appropriate temperature, and the decomposed carbon dioxide is excluded, and the obtained product with calcium oxide (CaO) as the main component is lime, also known as quicklime. In actual production, it is To speed up the decomposition, the calcination temperature is often increased to 1000 ~ 1100 ℃. Due to the large size of the limestone raw material or the uneven temperature distribution in the kiln during calcination, the lime often contains underfired lime and overfired lime. Synthetic sintered magnesia-calcium sand

 The calcium carbonate in the underfired lime is not completely decomposed and lacks cohesive force when used.

 Prevent the generation of overfired lime and underfired lime. Fused magnesia calcium sand

 The dolomite whose main component is calcium carbonate is calcined at an appropriate temperature, and the decomposed carbon dioxide is excluded, and the obtained product with calcium oxide (CaO) as the main component is lime, and magnesium aluminum spinel is also called quicklime. In actual production, in order to speed up the decomposition, the calcination temperature is often increased to 1000 ~ 1100 ℃. Due to the large size of the limestone raw material or the uneven temperature distribution in the kiln during calcination, lime often contains underfired lime and overfired lime.

 The calcium carbonate in the underfired lime is not completely decomposed and lacks cohesive force when used.