Lime Rotary Kiln
Lime Rotary Kiln is composed of cylinder, gears,support decvice, kiln liner and kiln tail sealing equiment, kiln head hood and combustion.Lime kiln as a heating device is a high-quality steel processed.
Application Range：construction, building, metallurgy, mining, industrial garbage waste disposal,chemical and other relevant industries.
Applicable Materials：mainly applied for limestone, quick lime, cement clinker, mineral ore, bauxite,aluminium hydroxide, iron ore and etc.
Save much running cost
New lime rotary kiln adopts international advanced combustion technology which can fully make use of cheap fuels, especially can reuse previously forbidden fuels. It can save great deal running cost for enterprises.
Cost less expense on raw material
It adopts space-filling and ventilated cylindrical and vertical cooler which can make sure proper discharged temperature. It brings about much convenience to transportation and storage. This system can preheat secondary air to higher than 7000 degrees, which save customers moving parts and special materials.
Good quality of final products
Final discharged lime produced by new type lime rotary kiln is characterized by strong chemical reaction, small bulk density and large specific surface area. It has become very important auxiliary material in sintering steel industry, coking and calcium carbide industry.
New technology greatly improves fuel utilization rate and greatly reduces great deal pollution. It has reached to national standard and makes wastes into useful energy. It is not only a kind of protection to environment, but also conform to national development aim.
High decomposition rate
New type rotary kiln holds advanced structure. Special vertical preheater can effectively improve preheating effect. Decomposition rate of preheated limestone can reach to 20% to 25%. What’s more, it can directly utilize 10 to 15 mm fine limestone.
Less energy consumption
This is reliable rotary kiln is equipped with combined with seal flake, which reduce air leakage factor and thermal loss. It is characterized by simple maintenance and low energy consumption.
1. Qualified lime kiln should be put into storage. After being elevated by elevator, materials will sent to top bunker in preheater. There are two level gages to control material amount added. Then, limestone will be sent to each chamber in preheater by tremie pipe.
2. Limestone will be heated to 900 degree by 1150-degree kiln flue gas. About 30% limestone will be decomposed. After being driven hydraulic roller, limestone will be decomposed into CaO and CO2. After decomposition, limestone will enter cooler where limestone will be cooled to less than 100 degree and be discharged. After heating exchanging, 600-degree hot air will enter kiln and mix with coal gas. After mixing with cold gas, waste gas will enter bag filter and enter chimney through fan.
3. Finally, after getting out of cooler, limestone will be sent to finished products storage through feeder, chain conveyor, bucket elevator and belt conveyor.
Technology process of lime kiln
Limestone and fuel will be put into lime kiln furnace. After being heated to 850 degree, limestone will be decomposed. After reaching 1200 degree, calcining process will be finished. After being cooled, limestone will be discharged out. The production of limestone will be finished. Different kiln has different preheating, calcining, cooling and ash-discharging type. However, some technological processes are similar. The raw materials hold high quality. The fuel holds high thermal value. Less energy is consumed. The pellets of limestone will change along with calcining time. Activeness and calcining time will change opposite from calcining temperature.
|Dimension||Power (kw)||Total weight (t)||Notes|
|Diameter (m)||Length (m)||Inclination (%)||Output (t/h)||Rotary speed (r/min)|
|Φ2.5×40||2.5||40||3.5||180||0.44-2.44||55||149.61||With vertical preheater|
|Φ2.8×44||2.8||44||3.5||400||0.437-2.18||55||201.58||Decomposition outside the kiln|
|Φ3.0×48||3||48||3.5||700||0.6-3.48||100||237||Decomposition outside the kiln|
|Φ3.0×60||3||60||3.5||300||0.3-2||100||310||Bauxite calcining kiln|
|Φ3.2×50||3.2||50||4||1000||0.6-3||125||278||Decomposition outside the kiln|
|Φ3.6×70||3.6||70||3.5||1800||0.25-1.25||125||419||Residual heat power|