Active lime production line

Processing materials - limestone, etc

Production - 150-600t/d

Equipment configuration: vibrating feeder, chain bucket conveyor, bucket elevator, belt conveyor, etc.

The active lime production line refers to the operational assembly line for producing active lime. The lime production line primarily consists of components such as the main body, crushing cone, and its suspension drive device. The main body is composed of three parts: the upper, middle, and lower sections, which are connected to each other using bolts. Both the upper and middle sections are lined with two rows of high-manganese steel lining plates. The lining plate of the middle section is supported on the flange of the main body. The upper end of the main body in the lime production line features a groove to secure the lining plate, preventing it from being pushed out by the upward thrust force during crushing. Zinc alloy is cast into the gap between the main body and the lining plate to tightly bond them together. The crushed stone materials in the lime production line are discharged along the inclined surface and chute lined with lining plates at the lower part of the main body.  

In the process flow of the active lime rotary kiln system, qualified limestone is stored in the material silo and lifted by a hoist before being transported into the material silo of the preheater section. The material silo of the preheater section controls the feeding amount through two level gauges, and then distributes the limestone evenly into each chamber of the preheater through the discharge pipe.

1. The production operation is stable, utilizing full negative pressure production, ensuring smooth airflow and high safety.

2. Installing a vertical preheater in the kiln tail of an active lime rotary kiln can fully utilize the tail gas to preheat limestone, significantly reducing fuel consumption.

3. High level of automation, operational adjustment of production system, fewer on-site operators, and high labor efficiency.

4. Industrial waste gases, such as blast furnace offgas, calcium carbide offgas, and semi-coke oven offgas, can be fully utilized as fuel for lime calcination.

5. The environmental protection dust collection is effective. The use of pulse bag filters for dust removal can effectively prevent environmental pollution.

Process flow

 After being preheated to above 800℃, limestone begins to decompose and is pushed into the kiln by a pusher device for further calcination. The calcination is completed at around 1200℃, and then the limestone is cooled by a cooler and discharged. The main component of limestone is calcium carbonate (CaCO3), while the main component of lime is calcium oxide (CaO). The basic principle of calcining lime is low-temperature preheating and high-temperature rapid burning, using a preheater and rotary kiln to heat and decompose limestone into calcium oxide and carbon dioxide.

customer benefits

1. The exhaust gas can be fully utilized to preheat limestone, significantly reducing fuel consumption and saving costs.

2. High level of automation, easy operation of the production system, fewer on-site operators, and high labor efficiency.

3. The activated lime production line employs a pulse bag filter for dust removal, effectively preventing environmental pollution.