Calcium Hydroxide Grinding Mill

Calcium Hydroxide Grinding Mill Introduction

The calcium hydroxide grinding mill is special powder grinding equipment developed to overcome technical difficulties of calcium hydroxide (Ca(OH)₂), such as light weight, easy adsorption and strong viscosity. Improved on the basis of Raymond mill, it upgrades the main machine grinding cavity, shovel structure and fan system. Integrating dispersion, grinding and classification, it effectively solves common problems of ordinary mills when processing calcium hydroxide including material adhesion, blockage and low efficiency. It is the preferred equipment for producing high-quality calcium hydroxide powder with fine particle size and high activity.

Features & Advantages of Calcium Hydroxide Grinding Mill

Structural Features

Grinding System: Built-in disperser carries out preliminary dispersion for digested calcium hydroxide with uneven moisture, agglomerates and relatively high hardness. Optimized shovel angle and structure can efficiently break sticky and wet materials and avoid accumulation at the bottom. Grinding components consist of specially surface-treated reinforced grinding rollers and anti-sticking grinding rings to tackle material adhesion. The main chamber adopts special curve design. Combined with internal air flow, material blockage is prevented from the source.

Classification System: With pneumatic flow channel optimization, surface anti-sticking treatment and high-grade sealing technology, air flow dispersion is realized together with the fan system, solving the problem of easy agglomeration and adhesion of calcium hydroxide during classification.

Collection & Dust Removal System: Equipped with cyclone collector and pulse baghouse dust collector. The dust collector uses anti-sticking membrane filter bags to prevent bag caking, together with air-locking discharge valves to avoid air leakage and guarantee collection efficiency.

Fan & Pipeline System: High-pressure fan serves as the power source. Air volume and air pressure are accurately calculated and matched to form directional airflow and reduce calcium hydroxide adhesion on grinding parts. The inner wall of pipelines is smoothly treated to ensure unobstructed air flow.

Performance Advantages

Anti-sticking Design: Targeting the strong adhesion of calcium hydroxide, anti-sticking treatment is applied on grinding chamber, classifier, dust collector and other components to eliminate material adhesion and caking for stable and long-term equipment operation.

Triple Dispersion: Triple dispersion technology precisely addresses agglomeration and blockage of calcium hydroxide. The built-in disperser pre-breaks agglomerated materials, optimized shovels disperse materials efficiently, and classifier & fan system cooperate for air flow dispersion.

High Quality & High Output: The unit output increases by 15%~30% compared with Raymond mill. Finished calcium hydroxide powder features high activity and fine fineness.

High Efficiency & Environmental Protection: Adopting cyclone collector and pulse membrane bag dust removal with air-locking discharge valves, the total powder recovery rate ≥99.9%, and dust emission concentration is far better than national standards.

Process Flow of Calcium Hydroxide Grinding Mill

Feeding & Dispersion

Digested calcium hydroxide is fed into the calcium hydroxide grinding mill by feeder. Massive or agglomerated calcium hydroxide is pre-dispersed by built-in disperser to reduce load of subsequent procedures. Then materials fall onto the rotating turntable and are thrown by shovels into the grinding zone formed by rollers and rings. Materials collide and get dispersed under centrifugal force.

Grinding & Classification

Materials lifted by shovels enter the grinding zone composed of specially treated reinforced rollers and anti-sticking rings for crushing. Upward air flow generated by high-pressure fan runs through the whole grinding chamber to disperse materials by air flow and effectively prevent secondary agglomeration of calcium hydroxide.

Fully dispersed calcium hydroxide powder is sent to classifier for precise separation. Qualified fine powder passes through while unqualified coarse powder returns for regrinding, forming an efficient, stable and anti-sticking closed-circuit grinding system.

Powder Collection & Dust Removal

Both cyclone collector and pulse membrane bag dust collector are equipped with air-locking discharge valves at the bottom. Under stable negative pressure of the whole system, finished calcium hydroxide powder is collected continuously and efficiently with collection efficiency ≥99.9%. The emission concentration is far better than national standards.

Application Scenarios of Calcium Hydroxide Grinding Mill

Technical Parameters of Calcium Hydroxide Grinding Mill

Frequently Asked Questions of Calcium Hydroxide Grinding Mill

What are the differences between calcium hydroxide grinding mill and Raymond mill?

Calcium Hydroxide Grinding Mill: Specially designed for calcium hydroxide, equipped with dispersion function. It effectively avoids wall adhesion and blockage. Finished powder has high porosity and good activity.

Raymond Mill: Wide material adaptability. Finished powder is mostly flaky or granular with uniform particle size and relatively low specific surface area.

Can calcium hydroxide grinding mill grind calcium oxide and other materials?

The calcium hydroxide grinding mill is used for grinding digested calcium hydroxide. Raw calcium oxide is strictly forbidden to grind directly, as calcium oxide will react violently with water vapor and bring explosion risks. For other materials, it can handle partial low-to-medium hardness (Mohs hardness ≤5), light and viscous materials such as kaolin, talc and barite, yet its working efficiency is lower than Raymond mill.

Which manufacturer supplies good calcium hydroxide grinding mill?

Calcium hydroxide grinding mill is special equipment optimized from Raymond mill to cope with adhesion and moisture absorption of calcium hydroxide. When selecting suppliers, you need to examine their technology of Raymond mill and calcium hydroxide processing. Guilin Mining Machinery is your best option. With 50 years of focus on powder processing, it has profound Raymond mill technology and ranks among China’s top 10 Raymond mill brands. It also holds multiple patents for calcium hydroxide processing technology. Its GK calcium hydroxide grinding mill features wear resistance and anti-corrosion. Fineness can be adjusted freely from 80~400 mesh, and 325 mesh sieve residue ≤5%. Optional calcium hydroxide powder classifier can be equipped to produce high-purity, fine and high-activity calcium hydroxide powder.

Why does calcium hydroxide grinding mill adopt pulse membrane baghouse dust collector?

Pulse membrane baghouse dust collector is adopted to handle high humidity and strong viscosity of calcium hydroxide. A smooth ePTEE microporous film is laminated on the surface of conventional filter bags to realize surface filtration for dust interception, achieving ultra-low emission ≤10mg/m³. Compared with ordinary filter bags, it has longer service life, filtration velocity reduced by 0.6~1.0m/min, low operating resistance, strong ash cleaning capacity and excellent anti-sticking performance. Ordinary pulse baghouse easily suffers from bag clogging and caking when treating sticky and wet materials due to poor ash cleaning performance.