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Question:

How long does it take for limestone to be decomposed in rotary kiln

How long does it take for limestone to be decomposed in rotary kiln

Answer:

The main auxiliary equipment with lime kiln feeding mechanism, distributor, air supply device, a combustion device, discharging device, relatively speaking, mixed burning cloth lime kiln hub, because it is in the fuel and limestone are loaded at the same time in the kiln, the kiln in charge necessary to achieve fair distribution through the cloth, eliminate furnace the wall effect, balance furnace resistance to the furnace section "lit" average. So has a great influence on the production efficiency of distributor form and application effect of lime kiln. There are a variety of fabrics, including rotary distributor, distributor, conch shaped fixed cloth and so on, very good to solve the original fuel the average particle size effect of mixing and fair distribution problems, and has the advantages of high temperature resistance, abrasion resistance and facilitate inspection and other advantages, especially suitable for small and medium sized lime kiln configuration, lime kiln distributor, burner and attachment Equipment
The main equipment of lime kiln, gas kiln main auxiliary equipment it is because of its fuel gas burner, the burner is through the combustible gas and the required oxygen (air) are mixed according to the proportion in the burner into the furnace combustion, and air volume of different gas required is different, different type of furnace and different heating methods, it needs the flame types are not the same. Such as premixed, semi mixed type, external mixing type and oxidation and neutral flame, reducing flame and so on. So the burner gas kiln to a certain extent determines the effect of calcined lime kiln. Of course, other ancillary equipment is also very important, such as cap see, similarity is very simple, but to ensure that the distribution of it for the amount of wind in the whole kiln kiln section have a good effect.
The main requirements for the quality of limestone used in industry are:(1) the requirements of high content of calcium carbonate components, the general requirements of more than 97%(2) the structure of grain should be small, because the small grain of lime Shi Jing is not tight, and in the case of containing organic matter, porous formation of combustion of organic matter, carbon dioxide separated easily, so it is convenient to calcine.(3) less impurities, particularly harmful ingredients such as silica, Magnesium Oxide, alumina, iron oxide, sulfur and phosphorus, etc. these ingredients in the limestone, if there are one percent, to the calcined lime, is the eighteen percent
It is only 2 to 4 hours to produce lime by rotary kiln, and the production efficiency can be increased by more than 5 times.(1) the quality and quantity of the rotary kiln calcination of limestone consumption, the general scale of lime quality is calcium oxide content, burning rate, activity, content of harmful ingredients, but the more important is that different industries, different purposes and different scale. Such as the calcium carbide industry in particular activity is it soft burning ash, it is exaggerated ironmaking industry strength, so hard to burning ash, steel is also soft burning ash. Therefore it is not the same as the index. The general scale of lime, calcium oxide content to reach more than 97%, had a burning rate of less than 10%, the activity of calcium to more than 300mi.(2) the quality scale of quicklime: 1.78 tons of limestone, but the "high" and "burnt" and the quality of limestone are also different

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