Enverinomental Friendly Shaft Kiln And Rotary Kiln In Quicklime
Production Plant
Lime Kiln Introduction:
Lime Kiln is the ideal equipment to produce quicklime by the
calcination of limestone (calcium carbonate). Usually, it has two
types: lime rotary kiln and lime vertical kiln. These two types
calcination kiln has different advantages. We will suggest you the
suitable type according to the different suitations.
Comprehensive Analysis and Comparison of Shaft Kiln and Rotary Kiln
Shaft kilns and rotary kilns are important equipment for
calcination of materials. In operation, the processes of shaft
kilns and rotary kilns are different, and each has advantages and
disadvantages. A comprehensive analysis of their advantages and
disadvantages is as follows:
1. The shaft kiln occupies a small area and the heat consumption is
relatively small; however, due to the complex structure of the
kiln, the materials are internally sealed and calcined, and the
heating is uneven, and the product has a high overburning rate,
which requires the formation of a type muffle furnace temperature
The field effect will greatly increase the activity of the product.
The sulfur in the fuel is easy to adhere, and the sulfur content of
the product will increase; and due to the requirements of the
airflow and pressure in the furnace, it is generally suitable for
burning large pieces to ensure the air permeability in the furnace.
2. The rotary kiln occupies a large area and has a large heat loss;
but the kiln body is simple and has smooth air flow. It is an open
calcination, and sulfur-containing flue gas can be discharged in
time. The sulfur in the fuel is not easy to adhere, and the sulfur
content in the product is reduced; Because the material rolls
forward uniformly inside, the heating is even, and the product
activity is high. Moreover, the multi-channel burner of the rotary
kiln realizes green energy saving, and is suitable for a wide range
of raw material size, and is particularly suitable for burning
small limestone.
Lime Kiln Technical Data:
| Technical Parameters Of Vertical Klin (Mixed Fuel) |
| Capacity(t/d) | Effective Volume | Effective Height | Effective Section | Limestone Size | Heat Consumption | CaO | Activity |
| (m3) | (m) | Dia.(m) | (mm) | (kJ/kg) | (%) | (mL) |
| 100 | 98 | 20 | Ø2.5 | 30~60/40~80 | <4600 | >90 | >300 |
| 120 | 141 | 20 | Ø3.0 | 30~60/40~80 | <4600 | >90 | >300 |
| 150 | 202 | 21 | Ø3.5 | 30~60/40~80 | <4500 | >90 | >300 |
| 200 | 301 | 24 | Ø4.0 | 30~60/40~80 | <4500 | >90 | >300 |
| 300 | 397 | 25 | Ø4.5 | 30~60/40~80 | <4400 | >90 | >300 |
| 400 | 491 | 25 | Ø5.0 | 30~60/40~80 | <4200 | >90 | >300 |
| 500 | 735 | 26 | Ø6.0 | 30~60/40~80 | <4200 | >90 | >300 |
| Remarks: All above data are for reference only. |
| | | | | | | | |
| Technical Parameters Of Vertical Lime Kiln (Fuel: Gas) |
| Capacity(t/d) | Effective Volume | Effective Height | Effective Section | Limestone Size | Heat Consumption | CaO | Activity |
| (m3) | (m) | Dia. or L×W(m) | (mm) | (kJ/kg) | (%) | (mL) |
| 50 | 70 | 20 | Ø2.0 | 30~60/40~80 | <4600 | >90 | >300 |
| 70 | 80 | 20 | Ø2.5 | 30~60/40~80 | <4600 | >90 | >300 |
| 80 | 100 | 20 | Ø2.5 | 30~60/40~80 | <4500 | >90 | >300 |
| 100 | 120 | 20 | Ø2.7 | 30~60/40~80 | <4500 | >90 | >300 |
| 120 | 140 | 20 | Ø3.0 | 30~60/40~80 | <4400 | >90 | >300 |
| 130 | 150 | 21 | Ø3.0 | 30~60/40~80 | <4200 | >90 | >300 |
| 150 | 200 | 20 | 2.5×4.5 | 30~60/40~80 | <4200 | >90 | >300 |
| Remarks: Above data are for reference only, and suitable for
Vertical Kiln which use low heat fuel. Utilization coefficient of
Vertical Kiln which use high heat fuel is higher. |
3. The shaft kiln that can produce high active ash is basically a
kiln introduced from abroad, and its investment level is about 10
million yuan to produce 100 tons of active ash per day; when the
rotary kiln was introduced from abroad, its investment was greater
than that of the shaft kiln, but After domestic digestion and
absorption, especially the introduction and digestion of foreign
preheating and cooling technologies, the rotary kiln can be
successfully applied to small-scale production, and the investment
has also dropped significantly. The investment level is basically
similar to that of imported shaft kilns.
4. The shaft kiln has good sealing properties, large heat loss, and
relatively low fuel consumption; the rotary kiln has a large heat
loss due to the long cylinder, but after the use of preheating and
cooling technology, the heat energy can be effectively used, and
its fuel consumption has been It can be reduced to a reasonable
level, and the production cost of the product can be effectively
controlled.
It can be said that the rotary kiln and the shaft kiln have their
own advantages in the operation. During the operation, the user can
choose the appropriate equipment according to the actual situation
in the operation.
