CR Hydrated Lime Grinding Mill

CR Hydrated Lime Grinding Mill Information Introduction

The CR Hydrated Lime Grinding Mill (also known as Calcium Hydroxide Grinding Mill) is a specialized grinding equipment developed by Cronus Machinery to overcome the technical difficulties of calcium hydroxide (Ca(OH)₂), such as light weight, easy adhesion, and strong viscosity. Based on the Raymond mill, it features improved grinding chamber geometry, shovel blade structure, and fan system.

Integrating dispersion, grinding, and classification into one unit, it effectively solves problems such as adhesion, clogging, and low efficiency commonly encountered when processing calcium hydroxide with ordinary grinding mills. It is the preferred equipment for producing high-quality (high fineness, high specific surface area) calcium hydroxide powder.

Features and Advantages of CR Hydrated Lime Grinding Mill

The CR Hydrated Lime Grinding Mill mainly consists of grinding, classification, collection and dust removal, fan and piping systems. Through full-process anti-adhesion design and triple dispersion technology, it solves problems such as calcium hydroxide agglomeration, clogging, adhesion and hardening. The finished product fineness is precisely controllable, enabling the production of calcium hydroxide powder with high fineness and high specific surface area.

Structural Features

Grinding System: An integrated disperser performs preliminary dispersion of hydrated lime with uneven moisture content, agglomerated lumps, and higher hardness. The shovel blade angle and structure are improved to more effectively break up sticky and wet materials, eliminating bottom accumulation. The grinding components consist of reinforced grinding rollers with special surface treatment and anti-adhesion grinding rings, overcoming the material adhesion problem. The interior of the main unit features a specially designed cavity curve, working in conjunction with internal airflow to prevent material clogging at the source.

Classification System: Through flow path aerodynamic optimization, surface anti-adhesion treatment, and advanced sealing technology, combined with the fan system for airflow dispersion, it solves the problems of agglomeration and adhesion during the calcium hydroxide classification process.

Collection and Dust Removal System: Utilizes a cyclone collector and pulse bag filter. The bag filter adopts anti-adhesion membrane-coated filter bags to prevent bag hardening, and is equipped with an airlock discharge valve to prevent air leakage from affecting collection efficiency.

Fan and Piping System: Uses a high-pressure fan as the system power source. Air volume and pressure are precisely calculated and matched to form a directional airflow that reduces calcium hydroxide adhesion on grinding component surfaces. The inner walls of the piping are smoothly treated to ensure unimpeded airflow.

Performance Advantages

Anti-Adhesion Design: Targeting the strong adhesion characteristics of calcium hydroxide, the Hydrated Lime Grinding Mill features anti-adhesion treatment on components including the grinding chamber, classifier, and dust collector, eliminating material adhesion and hardening, ensuring long-term stable operation of the equipment.

Triple Dispersion: Triple dispersion technology precisely solves the problem of calcium hydroxide agglomeration and clogging. The built-in disperser performs preliminary dispersion of agglomerated materials, optimized shovel blade structure efficiently breaks up materials, and the classification system works with the fan system to achieve airflow dispersion.

High Quality and High Output: Unit output is increased by 15%~30% compared to Raymond mills. The finished calcium hydroxide powder has high activity, with advantages of high fineness and high specific surface area.

High Efficiency and Environmental Protection: Utilizes a cyclone collector and pulse membrane-coated bag filter, combined with an airlock discharge valve. The total powder collection rate is ≥99.9%, and dust emission concentration far exceeds national standards.

Process Flow of CR Hydrated Lime Grinding Mill

Hydrated Lime → Feeder → Hydrated Lime Grinding Mill → Cyclone Collector → Pulse Membrane-Coated Bag Filter → Finished Product Packaging

Feeding and Dispersion

The hydrated lime after hydration is fed into the Hydrated Lime Grinding Mill via a feeder. It first passes through the built-in disperser for preliminary dispersion of lumpy or agglomerated calcium hydroxide, reducing the load on subsequent processes. The material then falls onto the rotating turntable and is thrown by the shovel blades into the grinding zone formed by the grinding rollers and rings, where it undergoes collision and dispersion under centrifugal force.

Grinding and Classification

The material lifted by the shovel blades enters the grinding zone composed of specially treated reinforced grinding rollers and anti-adhesion grinding rings for grinding and pulverization. Subsequently, the upward airflow generated by the high-pressure fan flows through the entire grinding chamber, performing airflow dispersion on the material and effectively preventing secondary agglomeration of calcium hydroxide.

Finally, the fully dispersed calcium hydroxide powder is sent to the classifier for precise separation. Qualified fine powder passes through, while unqualified coarse powder is returned for regrinding, forming an efficient, stable, and anti-adhesion closed-circuit grinding system, achieving high-quality calcium hydroxide powder processing of 80~400 mesh (325 mesh sieve residue ≤95%).

Collection and Dust Removal

Both the cyclone collector and the pulse membrane-coated bag filter are equipped with airlock discharge valves at the bottom. Under the premise of maintaining stable system negative pressure, they continuously and efficiently collect finished calcium hydroxide powder, ultimately achieving a collection efficiency of ≥99.9% with emission concentrations far exceeding national standards.

Application Scenarios of CR Hydrated Lime Grinding Mill

Technical Parameters of CR Hydrated Lime Grinding Mill

Frequently Asked Questions about Hydrated Lime Grinding Mills

What are the differences between a Hydrated Lime Grinding Mill and a Raymond mill?

Hydrated Lime Grinding Mill: Specifically designed for calcium hydroxide, equipped with dispersion function, effectively preventing calcium hydroxide from adhering to walls and clogging. The finished powder has high porosity, good activity, and relatively high specific surface area.

Raymond Mill: Widely applicable to various materials, producing finished powder that is mostly flaky or granular with uniform particle size and relatively low specific surface area.

Can the Hydrated Lime Grinding Mill grind calcium oxide and other materials?

The Hydrated Lime Grinding Mill is used for grinding hydrated lime after digestion. Direct grinding of raw calcium oxide is strictly prohibited, as calcium oxide reacts violently with water vapor, posing an explosion risk. For other materials, the Hydrated Lime Grinding Mill can also process some medium to low hardness (Mohs hardness ≤5), slightly viscous lightweight materials (such as kaolin, talc, barite, etc.), but its working efficiency is lower than that of Raymond mills.

Which Hydrated Lime Grinding Mill manufacturer is best?

The Hydrated Lime Grinding Mill is a specialized equipment improved and optimized from the Raymond mill to address the easy adhesion and moisture absorption characteristics of calcium hydroxide. Therefore, when selecting a Hydrated Lime Grinding Mill, it is necessary to evaluate the manufacturer's Raymond mill technology and calcium hydroxide process technology. Cronus Machinery is undoubtedly the best choice. Cronus Machinery has focused on powder processing for 50 years, with profound Raymond mill technology expertise, and is one of China's top ten recommended Raymond mill brands. It also holds multiple calcium hydroxide process patents. The developed CR Hydrated Lime Grinding Mill features wear and corrosion resistance, with finished product fineness adjustable from 80~400 mesh, 325 mesh sieve residue ≤95%. It can also be flexibly equipped with a Hydrated Lime Classifier to achieve production of calcium hydroxide powder with high purity, high fineness, and high specific surface area.

Why does the Hydrated Lime Grinding Mill use a pulse membrane-coated bag filter?

The Hydrated Lime Grinding Mill uses a pulse membrane-coated bag filter to address the characteristics of calcium hydroxide such as high humidity and strong adhesion. By compounding a smooth ePTFE microporous membrane on the surface of the ordinary filter bag of the pulse dust collector, surface filtration is achieved to block dust, thereby achieving ultra-low emissions of ≤10mg/m³. Compared with ordinary filter bags, it has a longer service life, reduced filtration velocity by 0.6~1.0m/min, and offers advantages of low operating resistance, strong cleaning capability, and high anti-adhesion properties. Ordinary pulse bag filters, when processing sticky and wet materials, experience difficulty in cleaning and are prone to bag clogging and hardening.