CR Hydrated Lime Classifier

CR Hydrated Lime Classifier Information Introduction

The CR Hydrated Lime Classifier is a high-efficiency classification equipment specially developed by Cronus Machinery for the specific characteristics of calcium hydroxide. It adopts advanced pre-classification technology (capable of directly classifying hydrated lime after hydration without grinding) and a full-system anti-adhesion design, successfully solving problems such as adhesion, clogging, and low classification efficiency found in traditional classifiers when processing calcium hydroxide.

This equipment features a compact design, reducing floor space by over 50% compared to traditional classifiers. With a specially designed anti-adhesion rotor and optimized airflow path, it achieves precise classification in the 200~600 mesh range, with capacity nearly twice that of traditional classifiers and 500 mesh sieve residue ≤95%. It is particularly suitable for high-end applications with strict product purity requirements such as putty powder and hydrated lime powder, making it core equipment for fine calcium hydroxide processing.

Features and Advantages of CR Hydrated Lime Classifier

The CR Hydrated Lime Classifier mainly consists of classification, dispersion, collection, and airflow systems. Targeting the easy-adhesion characteristics of calcium hydroxide, special anti-adhesion treatment has been applied to all key components including the rotor, spreading plate, and housing. With compact structural design, small floor space, high single-machine capacity, and convenient maintenance, it is the preferred equipment for fine production of high-purity, high-whiteness calcium hydroxide powder.

Structural Features

Classification System: Utilizes a specially designed anti-adhesion rotor and surface-treated blades combined with a high-pressure fan, effectively preventing calcium hydroxide adhesion and ensuring smooth operation.

Dispersion System: Built-in high-efficiency spreading device with a unique anti-adhesion spreading plate ensures thorough dispersion of calcium hydroxide material.

Collection System: Adopts a single cyclone collector design, featuring low investment, simple maintenance, unobstructed internal space, and excellent anti-adhesion and anti-clogging capabilities.

Airflow System: Internal streamlined volute structure reduces airflow resistance, with specially smoothed inner walls to prevent calcium hydroxide material clogging.

Traditional Classifier (Left) vs Hydrated Lime Classifier (Right)

Performance Advantages

Wear-Resistant and Stable: Key components are constructed with 8mm thick 16Mn high-strength wear-resistant steel, optimizing the equipment's steel structure and wear resistance, extending service life, and ensuring long-term continuous and stable operation.

Compact Structure: Features a compact structural design (4×6×8m), reducing floor space by over 50% compared to traditional classifiers (9×5×12m). The feed height is reduced by 5~10 meters, simplifying the lifting process and shortening the installation period to 3~4 days, effectively reducing investment costs.

Simple and Efficient: High production efficiency with single-machine capacity reaching 10~15t/h, nearly twice that of traditional classifiers (6~7t/h). Maintenance is simple, requiring only monthly oil lubrication for the classifier and fan with no additional maintenance costs, while traditional classifiers require regular maintenance of four cyclones, easily worn spreading discs, and complex piping under difficult operating conditions.

Stable Operation: The main unit and fan are mounted on independent supports, each fixed to concrete foundations. Material isolation reduces resonance effects, ensuring stable equipment operation.

Wide Application: Through optimized design and anti-adhesion technology, black slag contamination issues are completely resolved. The produced high-purity calcium hydroxide powder flexibly meets the diverse needs of high-quality calcium hydroxide powder industries such as hydrated lime powder and putty powder.

Process Flow of CR Hydrated Lime Classifier

Hydrated Lime → Feeder → Hydrated Lime Classifier → Single Cyclone Collector → Finished Product Packaging

Feeding and Dispersion

The hydrated lime after hydration is fed into the Hydrated Lime Classifier via a feeder and falls directly onto the high-speed rotating spreading plate. Under centrifugal force, it is dispersed and thrown to the periphery, effectively preventing calcium hydroxide agglomeration.

Precise Classification

The high-speed rotating rotor generates centrifugal force that throws unqualified coarse powder to the chamber wall, where it is discharged from the bottom under gravity. Simultaneously, a high-pressure fan creates an upward airflow that carries qualified calcium hydroxide powder into the collection system, achieving precise classification of 200~600 mesh calcium hydroxide powder (500 mesh sieve residue ≤95%).

Closed-Circuit Process: Classified coarse powder is returned to the lime slaker for further hydration, forming a closed circuit, or returned to the Hydrated Lime Grinding Mill for further grinding and classification, forming a closed circuit.

Open-Circuit Process: Classified coarse powder is discharged from the system as waste or low-quality product.

Finished Product Collection

Qualified calcium hydroxide powder enters the single cyclone collector with the upward airflow from the top outlet for gas-solid separation, ultimately obtaining the finished product.

Application Scenarios of CR Hydrated Lime Classifier

Technical Parameters of CR Hydrated Lime Classifier

Frequently Asked Questions about Hydrated Lime Classifiers

Why doesn't the Hydrated Lime Classifier use the commonly used double cyclone collector?

Calcium hydroxide is prone to adhesion and deliquescence. The single cyclone collector system is simple, has concentrated heat, and fewer air leakage points, effectively preventing calcium hydroxide adhesion and clogging.

What scenarios are suitable for open-circuit and closed-circuit processes of the Hydrated Lime Classifier?

Coarse Powder Returned to Lime Slaker (Closed Circuit): Suitable for processing over-burned and under-burned limestone raw materials. Coarse powder回流 enables secondary hydration, improving quicklime conversion rate and calcium hydroxide activity. Mainly applied in environmental fields such as wastewater treatment and desulfurization.

Coarse Powder Returned to Hydrated Lime Grinding Mill (Closed Circuit): Suitable for scenarios with calcium hydroxide fineness requirements and where coarse powder has recovery value. Precise particle size control is achieved through re-grinding of coarse powder, increasing calcium hydroxide added value. Mainly applied in high-end fields such as food and pharmaceuticals.

Coarse Powder Direct Discharge (Open Circuit): Typically used in scenarios with low calcium hydroxide fineness requirements. Simple process, low investment cost. Mainly applied in building materials fields such as construction mortar and wall putty powder.

Is the Hydrated Lime Classifier positioned before or after the Hydrated Lime Grinding Mill?

In the CR Calcium Hydroxide Production Line, pre-classification technology is adopted, with the classifier positioned before the Hydrated Lime Grinding Mill. It classifies the hydrated lime after hydration, directly selecting calcium hydroxide powder with qualified fineness as finished product. This improves the purity of the finished calcium hydroxide powder, avoids ineffective grinding and over-grinding, reduces the load and energy consumption of the Hydrated Lime Grinding Mill, and enhances the efficiency and stability of the entire production line.