[Soda ash knowledge] Daily question (78) 2009.12.20
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Fill in the blanks 1. The main component of limestone is ( ), and also contains ( ), ( ), ( ), ( ) and other impurities. The CO2 gas generated by calcining limestone is mainly used as ( ) gas in the carbonation tower, and the concentration is generally around ( ). 2. Limestone ( ) smells ( ), ( ) water, when exposed to acid ( ), is heated to decompose into ( ), ( ), and its main reaction equation is ( ). 3． Coke is obtained from coal through ( ). Its main component is ( ). When burned ( ), its surface appears ( ) color. Please hide the reply. If you do not hide it, you will not be graded in principle. Specific hiding methods: http://bbs.hcbbs.com/viewthread.php?tid=492556&highlight=%D2%FE%B2%D8
1. The main component of limestone is (CaCO3), and also contains (MgCO3), (SiO2), (Fe2O3), (Al2O3) and other impurities. The CO2 gas generated by calcining the limestone is mainly used as the (middle section) gas of the carbonation tower, and the concentration is generally around (40%). 2. Limestone is (odorless), (insoluble) in water, (decomposes) when exposed to acid, and decomposes into (calcium oxide) and (carbon dioxide) when heated. Its main reaction equation is (CaCO3→CaO+CO2↑). 3． Coke is obtained from coal through high-temperature distillation. Its main component is fixed carbon. When burned (smokeless), its surface appears (silver white or black gray).
Calcium carbonate, magnesium carbonate, ferric oxide, ferric tetroxide, calcium sulfide, raw material gas, 90%, none, none, lime, neutralization, calcium oxide, carbon dioxide, CaCO3=CaO+CO2, coking, carbon, large amounts of heat, blue
1. Calcium carbonate, magnesium carbonate, silica, ferric oxide, aluminum oxide, middle section, 40% 2. None, none, insoluble in, decomposed, calcium oxide, carbon dioxide, CaCO3---CaO+CO2 (g) 3. High temperature carbonization, fixed carbon, smokeless, silvery white or black gray
1. Calcium carbonate, magnesium carbonate, silica, ferric oxide, aluminum oxide, middle section, 40% 2. None, none, insoluble in, decomposed, calcium oxide, carbon dioxide, CaCO3---CaO+CO2 (g) 3. High temperature carbonization, fixed carbon, smokeless, silvery white or black gray
1. Calcium carbonate, magnesium carbonate, silicon dioxide, ferric oxide, aluminum oxide, middle section, 40%. 2. None, none, insoluble in, decomposed, calcium oxide, carbon dioxide, CaCO3---CaO+CO2 (g). 3. High temperature carbonization, fixed carbon, smokeless, silvery white or black gray. 1#chen3jun
1. CaCO3, MgCO3, SiO2, Fe2O3, Al2O3, middle section, 40% 2. None, none, insoluble in, decomposed, calcium oxide, carbon dioxide, CaCO3← heating→CaO+CO2↑ 3. High temperature carbonization, fixed carbon, smokeless, silvery white or black gray
1. CaCO3, MgCO3, SiO2, Fe2O3, Al2O3, middle section, 40% 2. None, none, insoluble in, decompose, calcium oxide, carbon dioxide, CaCO3—CaO+CO2 3. High temperature carbonization, fixed carbon, smokeless, silvery white or black gray
1. CaCO3, MgCO3, SiO2, Fe2O3, Al2O3, middle section, 40% 2. None, none, insoluble in, decomposed, calcium oxide, carbon dioxide, CaCO3==CaO+CO2 3. High temperature carbonization, fixed carbon, smokeless, silvery white or black gray
1. The main component of limestone is (CaCO3), and also contains (MgCO3), (SiO2), (Fe2O3), (Al2O3) and other impurities. The CO2 gas generated by calcining the limestone is mainly used as the (middle section) gas of the carbonation tower, and the concentration is generally around (40%). 2. Limestone is (odorless), (insoluble in) water, (decomposes) when exposed to acid, and decomposes into (calcium oxide) and (carbon dioxide) when heated. Its main reaction equation is (:CaCO3===(high temperature)===CaO+CO2↑). 3． Coke is obtained from coal through (high-temperature carbonization). Its main component is (fixed carbon). When burned (smokeless), the surface appears (silver white or black gray).
1. CaCO3, MgCO3, SiO2, Fe2O3, middle section, 40% 2. None, none, insoluble in, hydrolysis, calcium oxide, carbon dioxide, CaCO3 → (heating) CaO+CO2↑ 3. High temperature carbonization, fixed carbon, smokeless, silvery white or black gray.