lime rotary kiln that can be equipped with a vertical cooler

Lime Rotary Kiln Overview

Lime rotary kiln can be matched with vertical preheater and vertical cooler to form a complete energy-saving calcination system, which not only improves the thermal efficiency, but also significantly reduces the energy consumption and emissions. Lime rotary kiln is widely used in building materials, metallurgy, chemical industry, environmental protection and other industries on the lime production line, suitable for large-scale continuous operation.

Features of Lime Rotary Kiln

Reasonable structure: the cylinder structure welded with high-temperature-resistant steel plate, with the support of the pallet, transmission mechanism and sealing system, to ensure the stable operation of the kiln.
High thermal efficiency: with the help of multi-stage heat exchange system, make full use of high-temperature flue gas for preheating, combustion and cooling, reduce energy waste.
High product activity: through precise control of calcination temperature and time, the lime is fully calcined, with low raw burn rate and over-burn rate, and good product activity.
Operation automation: equipped with frequency control, temperature monitoring, combustion regulation and other intelligent systems, convenient operation, reliable operation.

Main Advantages of Lime Rotary Kiln

Adaptable: can be used for both small production lines with annual output of tens of thousands of tons, and also suitable for large lime production units of hundreds of thousands of tons.
Energy saving and emission reduction: the use of vertical preheater and cooler, the effective use of high temperature flue gas and cooling air, improve the heat recovery efficiency, reduce energy consumption and exhaust emissions.
Easy maintenance: kiln body design is easy to overhaul, long service life, extended downtime maintenance cycle.
Good environmental performance: can be equipped with multi-stage dust removal and desulfurization system to meet the strict environmental standards.

Working Principle of Lime Rotary Kiln

Limestone is fed from the top of the vertical preheater, and heat exchange with the high temperature flue gas flowing from the tail of the rotary kiln, so that the material temperature rises to about 800 °C and partially decomposed. Subsequently, through the hydraulic pushing device into the rotary kiln cylinder to continue to be heated, to complete the main calcination process (the temperature is generally in the range of 1200 ~ 1350 °C), the complete decomposition of limestone to generate calcium oxide (quicklime).
The calcined lime from the kiln head falls into the vertical cooler, and the drum into the cold air for heat exchange, was rapidly cooled down to near room temperature, while the hot air is introduced into the kiln as combustion air, to achieve heat recovery and energy saving. The cooled lime is discharged from the discharging system and can be directly fed into the screening or finished product storage system.

Application Fields of Lime Rotary Kiln

Metallurgical industry: used in iron and steel, non-ferrous metal smelting, as desulfurization agent, slagging agent.
Building materials industry: lime is an important raw material for cement, lime sand bricks, concrete and other materials.
Chemical industry: used in the preparation of sodium carbonate, bleaching powder, calcium hydroxide and other chemical products.
Environmental protection industry: lime is widely used in flue gas desulfurization, water treatment and other environmental protection projects.
Paper, sugar and other industries: lime is an important participant in the neutralization and chemical reaction.