Parameters of daily production of 100 tons of lime kiln
In the industrial production of lime, achieving a daily output of 100 tons is a significant milestone that requires precise control and optimization of various parameters within the lime kiln. This article delves into the key parameters essential for maintaining efficient and consistent production in a lime kiln with a target output of 100 tons per day. These parameters encompass aspects such as raw material characteristics, fuel selection, temperature control, and operational settings, all of which play a crucial role in determining the quality and quantity of lime produced.
Parameters of daily production of 100 tons of lime kiln
| Parameter | Description | Optimal Range for 100 Tons/Day Production | Impact on Production |
|---|---|---|---|
| Raw Material Composition | The chemical makeup of limestone, mainly calcium carbonate (CaCO₃) content. | 90% - 95% CaCO₃ | Higher CaCO₃ content leads to more lime production. Low content may require more raw material and increase impurities in the final product. |
| Raw Material Particle Size | The size of the limestone particles fed into the kiln. | 20 - 50 mm | Appropriate size ensures uniform heating and decomposition. Too large particles may not fully decompose, while too small ones can cause dust problems and affect airflow. |
| Fuel Type | The type of fuel used for heating the kiln, such as coal, natural gas, or fuel oil. | Varies based on cost and availability; commonly coal with a calorific value of 5000 - 6000 kcal/kg | Different fuels have different combustion characteristics and heat values, affecting the temperature and cost of production. |
| Fuel Consumption Rate | The amount of fuel required to produce one ton of lime. | 120 kg of coal equivalent per ton of lime | High fuel consumption increases production costs. Optimal combustion and heat transfer can reduce this rate. |
| Kiln Temperature | The temperature inside the lime kiln during the calcination process. | 900 - 1100 °C | At this temperature range, limestone decomposes efficiently into lime (CaO) and carbon dioxide (CO₂). Too low temperatures result in incomplete decomposition, while too high temperatures can cause over-burning and reduce lime quality. |
| Air Supply Rate | The amount of air supplied to the kiln for combustion and the calcination process. | Adjusted according to fuel type and kiln load; generally, enough to ensure complete combustion of fuel | Insufficient air leads to incomplete combustion, reducing heat generation and lime production. Excessive air can cool the kiln and increase energy consumption. |
| Residence Time | The time that limestone particles stay inside the kiln for complete decomposition. | 2 - 3 hours | Sufficient residence time ensures thorough calcination. Short residence times may result in under-burnt lime, while long times can lead to over-burning and increased energy costs. |
| Kiln Rotation Speed (for rotary kilns) | The speed at which the rotary kiln rotates. | 0.5 - 1.5 rpm |
Conclusion
The parameters outlined in the table above are interrelated and must be carefully balanced to achieve the desired daily production of 100 tons of high-quality lime. Continuous monitoring and adjustment of these parameters based on real-time production data are essential for optimizing the lime kiln's performance, reducing costs, and ensuring consistent product quality. By understanding and controlling these key factors, lime producers can enhance their operational efficiency and competitiveness in the market.
