Vertical lime kiln, lime shaft kiln process plant manufacturer | China staurk
Vertical lime kiln manufacturer
China Staurk's lime kilns are divided into horizontal lime rotary kiln and vertical lime rotary kiln
Vertical lime kiln capacity : 50 - 550 tpd
Horizontal lime rotary kiln capacity : 100 - 1200tpd
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horizontal lime rotary kiln. This article mainly introduces the vertical lime kiln processing mahcine .
What is a Shaft or Vertical lime kiln
Shaft lime kiln also called Vertical lime kiln, is a thermal equipment used for calcining various refractory clinkers. Like a cylinder, the material is added from the top and discharged from the bottom after being calcined. The air required for combustion is fed from the bottom of the kiln, and the combustion products are discharged from the top of the kiln.
Therefore, the shaft kiln is a counter-flow thermal equipment.
The process of material from top to bottom in the kiln is divided into preheating zone, calcining zone and cooling zone according to its heat exchange mode and effect.1/4, 1/2, 1/4.
Application
Widely used in metallurgy, chemical industry and many other industries, it is an excellent choice for producing high-quality active lime.
Classification
1. According to application
Lime shaft kiln, high alumina shaft kiln, light burning dolomite shaft kiln, etc.
2. According to the fuel used
Solid fuel shaft kiln, gas fuel shaft kiln, liquid fuel shaft kiln, etc.
3. According to the ventilation method
Forced ventilation shaft kiln, natural ventilation shaft kiln
4. According to the cross section
Circular shaft kiln, rectangular shaft kiln
Working principle
The flow direction of the material in the shaft kiln is opposite to the flow direction of the gas.
Movement of raw materials in the shaft kiln
1. The material is continuously discharged from the bottom of the kiln, and the upper raw fuel is continuously entered.
2. Material shrinkage occurs during material calcination.
Movement of gases in shaft kiln
The gas is blown into the kiln from the bottom of the kiln, and the flue gas is discharged from the top of the kiln.
Parameter of the Vertical lime kiln
|
Capacity（t/d） |
Volume（m3） |
Height（m） |
Diameter（m） |
Feeding size（mm） |
calorie consumption（KJ/kg） |
CaO（%） |
Activity（ml） |
|
100 |
98 |
20 |
Ø2.5 |
40~80 |
<4600 |
>90 |
>300 |
|
120 |
141 |
20 |
Ø3.0 |
40~80 |
<4600 |
>90 |
>300 |
|
150 |
202 |
21 |
Ø3.5 |
40~80 |
<4500 |
>90 |
>300 |
|
200 |
301 |
24 |
Ø4.0 |
40~80 |
<4500 |
>90 |
>300 |
|
300 |
397 |
25 |
Ø4.5 |
40~80 |
<4400 |
>90 |
>300 |
|
400 |
491 |
25 |
Ø5.0 |
40~80 |
<4200 |
>90 |
>300 |
|
500 |
735 |
26 |
Ø6.0 |
40~80 |
<4200 |
>90 |
>300 |
Features
1.This kind of kiln adopts intelligent centralized control system for material feeding, ash unloading and operation control.
2.Less under-fired and over-fired materials, stable product quality and high calcium oxide content, can produce high-quality lime.
3.All operations are simple and easy, and one operator per shift can ensure the operation of the lime kiln, which greatly improves labor productivity.
4.Monitor the calcination process of the shaft kiln in terms of ignition, batching, material distribution, firing zone, material discharge, air supply, etc. to ensure that all finished products have a high firing rate
Heat transfer in Shaft or Vertical kiln
The heat transfer methods of shaft kiln mainly include: conduction, convection, radiation
Preheating zone: The material entering the kiln exchanges heat with the high-temperature flue gas. The high-temperature flue gas is discharged after the temperature is lowered. After the temperature of the material increases, it enters the calcination zone for calcination. Due to the low temperature and large flow rate in this area, the convective heat transfer is used as the preheating zone. main, and other means.
Calcination zone: The material with higher temperature conducts sufficient heat exchange with the hot air to promote the complete calcination of the material. Convective and radiation heat transfer are the main factors in this area with high temperature and high flow velocity, supplemented by other methods.
Cooling zone: the material with higher temperature exchanges heat with the cold air, the material exotherms and cools down and discharges, and the cold air absorbs heat and warms up and enters the calcination zone for calcination of the material. Convective and radiation heat transfer are the main factors in this area with high temperature and high flow velocity, supplemented by other methods.
