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Lime Kiln

Lime Kiln

Introduction:Lime kiln is a kind of environmentally friendly. Active lime kiln is a type of rotary kiln and it is the main equipment used for calcining active lime. lime kiln has the advantages of simple structure, reliable operation and easy control of the production process.

Lime Kiln Overview

Lime kiln is also named as lime rotary kiln and active lime kiln, which is the main equipment for calcining active lime. Lime kiln is also a kind of environmentally friendly, energy-saving and high degree of mechanization and automatic equipment. It adopts modern technology, so it can take full advantage of cheap energy, especially gas which may pollutes the environment. It can turn the waste to treasure. It is widely used in limestone, dolomite, kaolin, cement, special cement, bauxite, refractory material, powder, magnesium oxide, zinc oxide, titanium iron, iron ore, alumina, coke and other industries. Lime kiln has many advantages such as advanced structure, stable performance, small air leakage coefficient, good sealing property, less thermal radiation loss, high yield and high level of automation.

The Advantages of Lime Kiln on Technology

This active lime kiln adopts combined type scale sealing, so that the air leakage factor is smaller than 10%. Compound type refractory matter is adopted to reduce the radiant heat loss.


Working Principle and Process

Limestone and fuel are loaded into the kiln (gas burner of fuel through pipes and into) preheating to 850 c begins to decompose. 1200 degrees to complete calcination, then cooled and removed from the kiln. Different furnace has different ways to preheating, burning, cooling and dust. However, the same principles are high quality raw materials, good lime quality; high calorific value fuel, consuming less quantity; limestone particle size is positive proportional to burning time; raw and calcined lime reactivity, calcination is inversely proportional to temperature.


Structure of Lime Kiln

Lime kiln is mainly made up of kiln body, feeding equipment, distributing devices, incendiary devices, the ash discharging device, electrical, instrumentation, control equipment, dust collecting system and other components. For different forms of lime kiln, its structures and burning forms differ in the form process is basically the same, but the value of the equipment is very different.

Parameter of Lime Kiln

Design capacity
(t/d)
150 200 250 300 350 400 500 600
Product Active lime Calcined dolomite Active lime Calcined dolomite Active lime Calcined dolomite Active lime Calcined dolomite Active lime Calcined dolomite Active lime Calcined dolomite Active lime Calcined dolomite Active lime Calcined dolomite
Preheater round vertical pre-heater or polygonal vertical pre-heater round vertical pre-heater or polygonal vertical pre-heater round vertical pre-heater or polygonal vertical pre-heater round vertical pre-heater or polygonal vertical pre-heater round vertical pre-heater or polygonal vertical pre-heater round vertical pre-heater or polygonal vertical pre-heater round vertical pre-heater or polygonal vertical pre-heater round vertical pre-heater or polygonal vertical pre-heater
Rotary kiln Specification
(m)
Ø2.5*40 Ø2.8*42 Ø3*46 Ø3.2*50 Ø3.5*54 Ø3.6*56 Ø3.8*58 Ø4*60
Ø4.2*50
Effective volume
(3m)
142 190 235 292 390 430 505 575/548
Burning temperature
(oC)
1350/1250 1350/1250 1350/1250 1350/1250 1350 1350 1350 1350
Cooler Vertical Square Cooler Vertical Square Cooler Vertical Square Cooler Vertical Square Cooler Vertical Square Cooler Vertical Square Cooler Vertical Square Cooler Vertical Square Cooler
Fuel Coal gas
Coal powder
Coal gas
Coal powder
Coal gas
Coal powder
Coal gas
Coal powder
Coal gas
Coal powder
Coal gas
Coal powder
Coal gas
Coal powder
Coal gas
Coal powder
Heat rate
(KJ/KgC3O)
5300/5000 5300/5000 5300/5000 5300/5000 5225 5225 5100 5100

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