Belt filter cloth with press machine—belt-type squeezing filter—chemical calcium hydroxide
Filter machine type: Belt press filter
Application Industry: Chemical Industry
Handling Material Description: Calcium Hydroxide
Filter cloth model: 3106

The Application of Industrial Filter Cloth in Solid-Liquid Separation for Calcium Hydroxide Purification in the Chemical Industry —— The core driving force behind the belt press filter machine

In the chemical industry, calcium hydroxide ( Ca(OH) ₂ ) is an important basic chemical raw material widely used in fields such as environmental protection, building materials, metallurgy, sugar production, papermaking, and fine chemicals. With the upgrading of industries and increasingly stringent environmental regulations, the production process of calcium hydroxide is gradually shifting toward higher purity, lower energy consumption, and more environmentally friendly technologies. In this process, Solid-liquid separation step It becomes the key to ensuring product purity and yield. As the core consumable for solid-liquid separation equipment, Industrial filter cloth Plays a crucial role in belt press filters.

I. Challenges in Solid-Liquid Separation During the Calcium Hydroxide Purification Process

In the purification process of calcium hydroxide, limestone is typically calcined to produce quicklime. CaO ), followed by a reaction with water during the digestion process to produce calcium hydroxide slurry. However, this process inevitably generates a large amount of impurities and insoluble particles, such as incompletely reacted lime particles, silicate impurities, iron oxides, and more. If these impurities are not efficiently removed during the solid-liquid separation stage, it will not only compromise the purity of the calcium hydroxide but may also lead to equipment blockages and fluctuations in product performance during subsequent processing steps.

The slurry is characterized by uneven distribution of solid particles, significant variations in particle size, and some particles having sticky surfaces, which makes filtration particularly challenging. Traditional sedimentation and natural clarification methods are inefficient, making it difficult to meet the modern chemical industry's growing demands for high purity and high efficiency. Therefore, a belt press filter combined with high-performance filter cloths is employed to achieve this purpose. Continuous and automated solid-liquid separation , becoming an important solution for chemical companies to purify calcium hydroxide.

II. Advantages of Belt Press Filters

The belt press filter is a continuously operating solid-liquid separation device that primarily relies on the conveyance of filter cloth and pressing action to achieve slurry dewatering, filter cake formation, and discharge. Compared to conventional filter presses, it offers the following advantages:

1. Continuous operation : Suitable for handling large-scale slurries, particularly ideal for chemical production lines like calcium hydroxide ones that require long-term stable operation.
2. High dehydration efficiency : Through multi-stage gravity dewatering and high-pressure roller pressing, the filter cake achieves a high solids content, while the filtrate exhibits excellent clarity.
3. High degree of automation : It can achieve automatic correction and automatic filter cloth cleaning, reducing manual intervention and boosting production efficiency.
4. Highly adaptable : Operating parameters can be flexibly adjusted according to the slurry characteristics, meeting the material requirements of varying particle size distributions and concentrations.

It can be said that the belt press filter is an indispensable piece of equipment in the calcium hydroxide solid-liquid separation process, and among them… Filter cloth performance , directly determines the separation effect.

III. The Critical Role of Filter Cloth in Calcium Hydroxide Filtration

The filter cloth is for the belt press filter machine. “ Heart ” It is not only the interface where materials are retained and filtrate passes through, but also a decisive factor influencing separation efficiency, filter cake quality, and equipment lifespan. In calcium hydroxide slurry processing, the filter cloth needs to address the following challenges:

• High-efficiency retention of fine particles : Calcium hydroxide slurry contains a large number of micrometer- or even sub-micrometer-sized particles, so the filter cloth must have a precise pore-size distribution to ensure high retention efficiency.
• Alkali resistance requirements : Calcium hydroxide is a strongly alkaline substance, so the filter cloth must have excellent chemical resistance to prevent degradation by alkaline solutions during prolonged use.
• Resistant to mechanical compression : In belt press filters, the filter cloth undergoes multiple high-pressure roller presses, requiring it to possess high strength and excellent tensile performance.
• Filter cake release property : Calcium hydroxide filter cake has a certain level of stickiness. If the filter cloth surface is difficult to peel off, it can lead to cleaning challenges and reduced operational efficiency.

Therefore, selecting the right filter cloth is the key to ensuring the smooth operation of the calcium hydroxide purification process.

IV. Citiuss CITIUS Industrial Filter Cloth Solutions

As a long-term partner in the research, development, and manufacturing of industrial filtration systems, Xiamen Citius CITIUS Filtration Materials Technology Co., Ltd. We have accumulated extensive experience in the solid-liquid separation of calcium hydroxide. Leveraging three decades of R&D and manufacturing expertise, Citiuss CITIUS provides the chemical industry with a range of high-performance filter cloths—particularly excelling in belt press filtration applications, where they demonstrate distinct advantages:

1. High-efficiency separation performance
   The CITIUS filter cloth from Citiuss has been optimized in both pore size design and weaving technology, enabling highly efficient retention of fine particles in calcium hydroxide slurry, significantly improving the clarity of the filtrate and ensuring product purity.
2. Excellent alkali resistance
   The filter cloth material exhibits excellent alkali resistance, allowing it to operate stably for extended periods even in highly alkaline slurry environments, thereby prolonging its service life and reducing the frequency of replacements.
3. High strength and pressure resistance
   The filter cloth features a specially designed fiber structure, providing exceptional resistance to tensile forces, abrasion, and compression—enabling it to withstand prolonged, high-intensity mechanical pressing.
4. Good filter cake release properties
   The surface-treated filter cloth effectively reduces the adhesion of calcium hydroxide filter cake, allowing for smoother cake detachment. This not only enhances the cake-discharge efficiency but also eases the cleaning workload.
5. Customized Processing
   Based on the characteristics of customer equipment and process requirements, Citiuss CITIUS can provide a variety of processing techniques, including glue brushing, edge wrapping, heat setting, and perforation, ensuring a perfect match between filter cloths and equipment.

V. Application Cases and Effects

In several calcium hydroxide purification projects at chemical enterprises, the combination of Citiuss CITIUS industrial filter cloths with belt press filtration machines has demonstrated significant advantages:

• Improved clarity of the filtrate 30% The above , the product purity has significantly improved;
• Filtrate cake solids content increased 20% Left and right , significantly reducing subsequent drying energy consumption;
• Filter cloth service life extended 1.5 Twice , which reduces operating costs;
• The equipment operates more stably. , reducing downtime caused by filter cloth blockage or damage.

These data not only highlight the practical value of the filter cloth but also demonstrate Citiuss CITIUS's technological prowess in the field of solid-liquid separation.

VI. Conclusion

In the process of chemically purifying calcium hydroxide, the solid-liquid separation stage is critical in determining both product quality and production efficiency. The combination of belt press filter machines with high-performance industrial filter cloths has become a key strategy for modern chemical companies seeking to enhance their competitiveness. With three decades of accumulated expertise and relentless innovation, Citiuss CITIUS not only delivers premium-quality filter cloth products but also offers tailored solutions, helping the chemical industry strike a balance among efficiency, purity, and environmental sustainability.

In the future, as fine chemicals and green manufacturing continue to advance, the role of industrial filter cloths will become even more prominent. Citiuss CITIUS will remain committed to driving high-quality development in the chemical industry by leveraging technological innovation and practical application expertise, providing reliable solid-liquid separation solutions to customers worldwide.