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Industrial filter cloth, horizontal vacuum belt filter, stainless steel and nickel industry filter steel slag and tailings
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Detailed Description
In steel slag tailings “ Hidden resources ” —— The value of industrial filter cloth in the treatment of stainless steel and nickel industry solid waste
In “ Dual Carbon ” In the era of parallel advancement of strategic and efficient resource utilization, the steel and non-ferrous metal industries are facing increasingly severe challenges in both environmental protection and efficiency. Especially in the production of stainless steel and nickel, a large amount of steel slag tailings are produced, which are not only huge in volume and complex in composition, but also often rich in recoverable metal elements. How to achieve effective dehydration, resource recovery and environmental disposal has become the key to the industry's green transformation.
In this process, Horizontal Vacuum Belt Filter ( Horizontal Vacuum Belt Filter ，Abbreviation HVBF ) and high-performance industrial filter cloth combination is gradually becoming the preferred technical path for the treatment of steel slag tailings.
I. Steel slag tailings: by-products of stainless steel and nickel production “ grey by-products ”
Stainless steel and nickel production mainly use electric furnace smelting and pyrometallurgical extraction at high temperatures. In these processes, a large amount of smelting slag and tailings are produced:
- Blast furnace steel slag, water slag ：Fine particles, containing iron oxide, chromium, nickel and other components
- Nickel slag tailings ：Often contains residual Ni 、 Co 、 Fe ，part of which is acid leaching residue
- Wet tailings ：High water content solid materials formed after washing, magnetic separation and thickening
These tailings have high viscosity, fine particle size, and are difficult to dehydrate. If they are directly stacked, they not only occupy land but also have the risk of heavy metal leakage; however, if the metal can be effectively dehydrated and recovered, it will not only turn waste into treasure, but also reduce environmental protection costs.
II. HVBF ：Ideal equipment for continuous and efficient treatment of steel slag tailings
Compared with traditional plate and frame filter presses or thickeners + centrifugal system, HVBF shows the following significant advantages in the treatment of steel slag tailings:
Project | HVBF Performance advantages |
|---|---|
Processing capacity | Supports high-flow continuous processing, suitable for high-yield production lines in steel plants and nickel plants |
Filter cake dehydration rate | Vacuum zone control, combined with high-performance filter cloth, can reach 30-40% Water control |
Washing function | Multi-stage spray system, suitable for acid leaching slag, nickel-containing tailings and other scenes requiring backwashing |
Automation level | Stable operation, continuous discharge, supports remote control and centralized management |
Land occupation and maintenance | Compact structure, small footprint, long maintenance cycle |
HVBF The core filtering element —— Filter cloth ，determines the overall system's separation accuracy, throughput capacity, filter cake quality and long-term stability.
III. Industrial filter cloth: the invisible protagonist that determines the separation effect “ Invisible protagonist ”
For the complex and changeable material characteristics of stainless steel and nickel steel slag tailings, industrial filter cloth must have the following core performance:
1. High filtration accuracy
Steel slag tailings contain a large number of fine particles and metal micro-powders, such as Ni 、 Fe 、 Cr metal oxides, requiring the filter cloth to effectively retain 0.5~100 micrometer solid particles.
2. Corrosion resistance and wear resistance
The treated objects often contain acid washing residue or high-temperature materials. The filter cloth needs to have comprehensive characteristics such as acid resistance, alkali resistance, wear resistance, and high tensile strength to prevent rapid aging or breakage.
3. Good stripping performance
If high-viscosity tailings cannot be smoothly stripped, it will cause filter cloth blockage and system shutdown. Surface treatment (such as water repellency, lubricant coating) is required to optimize the cake unloading effect.
4. Strong stability and regenerability
In a continuous negative pressure operating environment, the filter cloth must have long-term stability and be easy to wash or clean online to ensure its life cycle.
IV. Xiamen Citius (Xiamen Citius) ：Custom high-performance filter cloth solutions for steel slag tailings
Xiamen Citius (Xiamen Citius) Filter Materials Technology Co., Ltd., as a leading brand in China's filter materials field, focuses on stainless steel and nickel industries HVBF Application scenarios, development of a variety of high-performance special filter cloths.
Typical characteristics include:
- Multi-layer composite structure design The upper layer provides strong support, the middle layer provides efficient filtration, and the lower layer assists in drainage, ensuring both filtration accuracy and structural stability.
- Materials suitable for high-acid environments The filter cloth uses modified polyester or polyamide fibers developed for use in sulfuric acid and hydrochloric acid tail liquid environments.
- High-throughput structure Through unique weaving technology and micro-channel design, it improves liquid flow rate and reduces vacuum energy consumption.
- Customizable processing Supports functional processing such as edge wrapping, punching, conductive, and anti-stick, matching various domestic and imported HVBF models.
Xiadias (Xiamen Citius) Possesses a complete material R&D, performance testing, and pilot line, capable of customizing optimal filter cloth solutions for different tail sludge properties (nickel content, pH particle size distribution, etc.).
V. Sharing of Actual Cases: Steel Slag Dewatering Project of a Large Stainless Steel Plant
Project Background: Annual output of 100 tens of thousands of tons of stainless steel plant, producing a large amount of nickel-containing steel slag, which forms high-water-content tail sludge after washing and concentration.
(Xiamen Citius) Participated in project design and provided the following support:
- Design of special filter cloth (filtration accuracy 50μm water repellent treatment)
- Optimized filter cloth replacement cycle, from 30 days increased to 90 days
- Filter cake moisture content control from the original 50% reduced to 35% facilitating subsequent drying and transportation
- Annual savings in tail sludge treatment costs exceeding one million yuan
Customer feedback indicates that the reliability of the filter cloth has significantly improved the operating efficiency of the filtration system and reduced maintenance downtime.
VI. Future Outlook: Moving Towards Resource Regeneration and Zero Emissions
With the increasingly stringent management of industrial solid waste and the increasing demand for the comprehensive utilization of stainless steel and nickel resources, graded treatment and resource recycling of steel slag tail sludge will become mainstream Under this trend:
- High-performance filter cloth will continue to develop towards higher filtration accuracy, longer service life, and stronger chemical adaptability;
- Intelligent HVBF system will gradually be connected to the factory automation platform to achieve remote monitoring and intelligent operation and maintenance;
- Customized service model will become the core competitiveness of filter cloth suppliers, shifting from simple supply to “ system matching + optimization suggestions ”。
Conclusion
From “ steel slag is waste ” to “ tail sludge is a resource ” industrial filter cloth has played a key role in the transformation. In the increasingly efficient, clean, and intelligent production pattern of the stainless steel and nickel industry, companies like (Xiamen Citius) with profound technical and practical experience will continue to empower the green upgrading of the industry.
Industrial filter cloth Horizontal vacuum belt filter Stainless steel and nickel industry Filtering steel slag tail sludge
Filter type: Horizontal vacuum belt filter
Application industry: Stainless steel and nickel industry
Material description: Steel slag tail sludge
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