The lime rotary kiln has many advantages in the process of lime ore processing. It is also called a lime kiln. It is a highly professional calcining equipment. Its main advantages are large production capacity, no noise at work, and low comprehensive energy consumption. The main processing equipment for processing lime, it has a very high industrial value

1. The design of lime rotary kiln specifications should be comprehensively determined according to the requirements for the output of the firing system, combined with the original, fuel conditions, and the configuration of the preheater, calciner, and cooler.

2. The length to diameter ratio (L/D) of the preheater kiln and precalciner kiln should be 11-16.

3. The slope of preheater kiln and precalciner kiln should be 3.5%-4%; speed: precalciner kiln should be 3.0-3.5r/min, preheater kiln should be 2.0-2.5r/min; speed regulation Range 1:10.

4. Forced air cooling should be adopted for the cooling of the cylinder of the limestone rotary kiln firing belt.

5. The calcining zone of limestone rotary kiln should be equipped with cylinder temperature detection measures.

6. The main motor of the lime rotary kiln should be a stepless variable-speed motor, and an auxiliary drive should be provided. The auxiliary drive should have a backup power supply.

The main component of limestone is calcium carbonate, and the main component of lime is calcium oxide. The basic principle of burning lime is to use high temperature to decompose calcium carbonate in limestone into quicklime which is calcium oxide and carbon dioxide. The process is as follows: limestone and fuel are loaded into the lime rotary kiln and decomposed at 850°C for preheating, and calcination is completed at 1200°C. After cooling, it is discharged out of the kiln. The production of quicklime products is completed. Different kiln shapes have different preheating, calcination, cooling and ash unloading methods. However, several technological principles are the same: high quality raw materials and good lime quality; high fuel calorific value and low quantity consumption; limestone particle size is directly proportional to calcination time; quicklime activity is inversely proportional to calcination time and calcination temperature.

1. It can provide an ideal and uniform temperature field to meet the requirements of lime calcination.

During the calcining process of the rotary kiln, the limestone has both axial movement and radial tumbling in the kiln. The burner nozzle of the rotary kiln sprays high-temperature flame and hot air flow, so that the limestone is exposed to radiation, convection, and convection in the kiln. Conducting three heating methods, so the limestone is heated evenly, the white ash burnt rate is lower, and the lime quality is better.

2. High productivity, high efficiency, low heat consumption

The equipment of the rotary kiln calcining system has passed technological innovation. In the system, the hydraulic gear wheel device is adopted, the high-precision metering plunger pump, the speed control valve, and the contact type graphite block sealing device are adopted, and the performance is stable, the output is high, and the energy consumption is low. .

3. Flexible control, stable operation, green and environmental protection

The output and quality can be adjusted conveniently and flexibly by adjusting the preheater's pushing cycle, kiln body speed, air-to-coal ratio and other parameters. The equipment runs smoothly, the failure rate is low, and the operation rate is high. Since the rotary kiln is operated under full negative pressure, the on-site environment is very good and fully meets the requirements of environmental protection.