gcash maintenance today 2023 thành phố Chí Linh
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gcash maintenance today 2023Dolomite powder
Details DOLOMITE POWDER1) Producing refractory bricks• Dolomite is sintered until all CO2 is released and complete recrystallization of oxides to obtain the sintered dolomite. Sintered dolomite is black, tightly, weight 3.3 tons/m3. Bringing this product to water, the MgO and CaO were hydrogenated and dissolved into powder. People use this powder to patch the furnace or mix with 10 – 15% pitch to produce compaction materials to compact the bottom of the furnace. • From a mixture of magnesite – dolomite (containing 30-50% dolomite), it is made of martensite, a self-adhesive powder.• Dolomite bricks and beton chromomololite bricks have high fire resistance, so they are used for lining electric furnace and rolling steel furnaces. It requires dolomite to be good at fire resistance in the sintered state, which is not decomposed into the mixture of silicate and alumosilicat Mg, Ca, Fe, Mn which are easily melting and corrosive.• In fact, dolomite mixed with 2 – 3% SiO2 and 2-5% Al2O3 + Fe2O3 + MnO2 are easier to sinter, for clinker to withstand temperatures up to 1,750 – 1,7600 and very good to withstand slag. On the other hand, it is also found that dolomite contains 1 – 6% SiO2, which is not only harmful but also anti-hydrogenated product. However, if the content of silicon oxide is too high, the compound 2CaO.SiO2 will appear, which will cause the sintered dolomite to easily dust, emit fumes, and waste rapidly.• Fe, Al, Ti, and Mn oxides all appear to be beneficial because they greatly improve sintering and reduce the ability to hydrate the sintered dolomite powder. However, if the amount of these compounds is too high, a large amount of braunmilerite and aluminate 3 calcium will result in sintered dolomite powder reducing the fire resistance.• The presence of free CaO will make the product more resistant to fire, but on the other hand CaO is very sensitive with CO2 of the air as well as reacting with Al, Fe to create fusible compounds.2) In ferrous metallurgy• Using dolomite as a fluxing aid, burning slag and making magnesium sinter quarry.• Dolomite used as a fluxing aid in metallurgy has the following standards: MgO> 17-19%, SiO2 &……
