• Industrial filter cloth, horizontal vacuum belt filter, vanadium slag processing from vanadium-titanium magnetite ore
  Filter type: Horizontal vacuum belt filter
  Application industry: Vanadium-titanium magnetite ore washing and selection
  Material description: Vanadium slag
  

The key role of industrial filter cloth in horizontal vacuum belt filter for vanadium slag processing from vanadium-titanium magnetite ore

With the increasing demand for vanadium resources in China's steel, chemical, and new energy industries, the comprehensive development and utilization of vanadium-titanium magnetite ore resources has become an important direction for both efficient resource utilization and environmental governance. In the washing and selection process of vanadium-titanium magnetite ore, the dehydration of vanadium slag is a key link affecting the efficiency of subsequent resource recovery and solid waste treatment. As a highly efficient and continuously operating solid-liquid separation equipment, the horizontal vacuum belt filter, with its strong adaptability and controllability, has been widely used in vanadium slag dehydration systems. The supporting industrial filter cloth plays a crucial role in the entire filtration process, and its performance directly affects the dehydration effect, operational stability, and economy of vanadium slag processing.

I. Background of vanadium-titanium magnetite ore washing and selection and vanadium slag processing

Vanadium-titanium magnetite ore mainly uses titanium magnetite as a carrier, and vanadium is mainly present in the magnetite crystal lattice. In the beneficiation process, magnetic separation is usually used — Combined with flotation technology, iron concentrate is first extracted, and then vanadium is recovered through chemical leaching and roasting. Vanadium slag is a byproduct of these processes, with complex physical properties, high water content, uneven particle size distribution, strong viscosity and adhesion, and a certain amount of titanium, calcium, silicon, and other impurities. Because vanadium slag still contains recoverable metal components and is also a potential source of environmental pollution, its efficient dehydration, resource recovery, and environmental protection treatment are of great significance.

However, due to the high concentration, fine particles, and low permeability of vanadium slag, its filtration treatment is difficult. Traditional plate-and-frame filter presses or centrifugal equipment have certain bottlenecks in efficiency, continuity, and maintainability. At this time, the horizontal vacuum belt filter, with its advantages of continuous feeding, vacuum negative pressure filtration, and continuous filter cake discharge, has become the preferred equipment for vanadium slag dehydration.

II. Principle and characteristics of horizontal vacuum belt filter

Horizontal Vacuum Belt Filter ( Horizontal Vacuum Belt Filter, HVBF ) is a high-efficiency equipment that uses continuous vacuum suction to achieve solid-liquid separation of materials. Its working principle is as follows:

1. The material is evenly distributed from the slurry tank onto the running filter cloth;
2. The filter cloth is laid on the top of the supporting rubber belt, which is supported by rollers;
3. The vacuum box fixed below forms a negative pressure zone with the belt through sliding sealing;
4. The vacuum negative pressure causes the liquid phase to pass through the filter cloth into the vacuum pipe, and the solid phase remains on the surface of the filter cloth to form a filter cake;
5. The filter cake can be multi-stage washed and dried during operation, and finally removed by a scraper;
6. The filter cloth is cleaned and recycled.

Core advantages include: ：

• Continuous operation, large processing capacity;
• Vacuum driven, fast filtration speed, low energy consumption;
• Multi-stage washing and dehydration can be achieved to improve recovery rate;
• Open structure, easy to maintain and observe;
• Strong adaptability, can handle difficult-to-filter materials with high viscosity, high fineness, and high solid content.

Therefore, HVBF is particularly suitable for the filtration and dehydration of difficult-to-handle solid-liquid mixtures such as vanadium slag, red mud, lithium mica, and phosphogypsum.

III. Challenges of vanadium slag filtration and filter cloth performance requirements

The particle size distribution of vanadium slag is mostly -100μm or less, the particles are very fine, and have the following characteristics:

• Strong adhesion : Easy to block the pores of the filter cloth, resulting in uneven filter cake;
• Viscous filtrate : The liquid phase contains a large amount of metal ions and residues;
• High water content : Conventional equipment is difficult to reduce the water content to the requirements of transportation and resource utilization;
• Acid-base fluctuation : High requirements for the chemical corrosion resistance of the filter cloth material.

Therefore, the supporting industrial filter cloth must not only have good filtration accuracy and dehydration efficiency, but also meet the following key performance requirements:

1. Balance between high retention accuracy and permeability : Ensure that the filter cloth can effectively intercept fine particles without excessively sacrificing filtration speed;
2. Strong chemical resistance : Adapt to the corrosive environment of acidic or alkaline vanadium slag;
3. Good stripping property : The filter cake is easy to peel off automatically, reducing mechanical intervention and extending the service life of the filter cloth;
4. High strength and structural stability : Adapt to long-term operation and stretching conditions;
5. Excellent regenerability : Easy to clean online, ensuring that high efficiency is maintained even after multiple cycles of use.

IV. Application advantages of Xiamen Xiadiasias industrial filter cloth

In the practical application of vanadium slag filtration, industrial filter cloths developed by Xiamen Xiadias Filtration Materials Technology Co., Ltd. have achieved stable operation and excellent performance in multiple ferro-vanadium mining projects. Its horizontal vacuum belt filter cloth, based on high-density weaving technology and special surface treatment processes, has the following advantages:

1. Precise Pore Size Control Through a double-layer or multi-layer weaving structure, the pore size distribution is effectively controlled, balancing precision and flow rate;
2. Enhanced Anti-Clogging Performance Smooth surface treatment + Anti-adhesive coating, improves filter cake release;
3. Excellent Chemical Resistance Suitable for acid washing / alkaline immersion environment, ensuring long-term operational stability;
4. High Mechanical Strength Supports long-time, high-load operation, good wear resistance;
5. Personalized Customization Service According to the specific properties of vanadium slag, process parameters and equipment model, provide customized solutions for filter cloth specifications, edge binding, and gluing.

In actual cases, by using Xiadias filter cloth, the vanadium slag filtration capacity of a certain ferro-vanadium mine washing and selecting line has been improved 30%，滤饼含水率从原来的28%降至22%，滤布更换周期从每月1次延长至3 months, greatly reducing operating costs and maintenance pressure.

V. The Convergence of Intelligence and Green Development

With “ Double Carbon ” The promotion of the concept of efficient resource utilization and clean production under the strategic background, the goal of vanadium slag treatment is not only dehydration, but also subsequent resource regeneration and harmlessness to the environment. In the future, the combination of industrial filter cloth and horizontal vacuum belt filter will further develop towards intelligence and green development:

• Online Monitoring System Real-time monitoring of filter cloth tension, permeability, and clogging degree through sensors to achieve predictive maintenance;
• Intelligent Backwashing System Automatically adjust the cleaning pressure and frequency according to the degree of filter cloth pollution;
• New Material Filter Cloth R&D Develop new materials such as nanofibers and composite fabrics to improve the retention rate and durability of fine particles;
• Green Recycling and Utilization Explore the recycling and reprocessing of filter cloth and the in-depth extraction of valuable components in vanadium slag.

Xiamen Xiadias has carried out a number of cooperative research and development projects in the above fields, aiming to push industrial filtration towards a smarter and more environmentally friendly new era.

Conclusion

The development and utilization of ferro-vanadium resources is an important part of China's strategic resource security system, and the efficient and environmentally friendly dehydration treatment of vanadium slag is a key link. Horizontal vacuum belt filter, with its powerful process advantages, has become an important technical support for vanadium slag dehydration. The application of high-performance industrial filter cloth determines whether the equipment can exert its maximum efficiency in practice. Xiamen Xiadias relies on 30 years of industry experience, a rich product matrix and customized service capabilities, continues to provide reliable filtration material solutions for vanadium slag treatment, contributing to the win-win of green production and economic benefits for mining enterprises.