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Industrial filter cloth applications: horizontal vacuum belt filter, nickel industry steel slag mud dewatering
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Detailed Description
- Industrial filter cloth applications: Horizontal vacuum belt filter for nickel industry steel slag sludge dewatering
Filter type: Horizontal vacuum belt filter
Application industry: Nickel industry
Material description: Steel slag sludge dewatering
Application of industrial filter cloth in nickel industry steel slag sludge dewatering —— With the horizontal vacuum belt filter as the core equipment
In the field of non-ferrous metal smelting, nickel is a strategic resource. Its smelting process generates a large amount of nickel-containing steel slag and metallurgical waste sludge. These solid-liquid mixtures are not only rich in metal resources but also have high processing difficulty. To achieve the dual goals of resource recovery and environmental protection, Using a horizontal vacuum belt filter ( Horizontal Vacuum Belt Filter, HVBF ) with high-performance industrial filter cloth for steel slag sludge dewatering has become an effective technical path for industry development 。
Characteristics and processing challenges of nickel industry steel slag sludge
Nickel smelting steel slag sludge mainly comes from high-temperature smelting or hydrometallurgical processes. It is highly viscous and has a high water content. Its components include fine-grained metal oxides, hydrated hydroxides, and some residual acid-base components. Its processing faces the following challenges:
- Fine particle size, uneven distribution ，affecting filter cloth permeability;
- Material is easy to block the cloth, difficult to form a cake ，placing extremely high demands on filtration equipment and filter cloth performance;
- Contains high-value metals (such as nickel, iron) ，the filter cake needs to be recycled after dewatering;
- Large sludge production, strong demand for continuous processing capacity 。
Therefore, relying solely on traditional pressure filtration or thickening sedimentation methods is difficult to meet the requirements of industrial operation. The horizontal vacuum belt filtration system has become the preferred solution.
Advantages of horizontal vacuum belt filter
HVBF equipment with its continuous operation, large processing capacity, low filter cake moisture content, high degree of automation and other characteristics, is widely used in metallurgy, chemical industry, mining and other solid-liquid separation scenarios. In the processing of steel slag sludge, HVBF The vacuum degree, filter cloth running speed, and water distribution system parameters can be adjusted to achieve efficient filtration and filter cake separation.
Especially in the steel slag sludge dewatering process, HVBF The original moisture content can be reduced from 80% above to 35%-45% ，significantly reducing subsequent drying or transportation costs.
The key role of industrial filter cloth
In the entire filtration process, the industrial filter cloth, as the core filtration medium, directly determines the filtration efficiency, filter cake quality, and operating costs. Considering the characteristics of steel slag sludge, the ideal filter cloth should meet the following conditions:
- Excellent particle retention capacity ，can block micron-level metal oxides;
- High air permeability and liquid permeability ，ensuring filtration speed;
- Good anti-blocking and stripping properties ，preventing cloth clogging after long-term operation;
- Strong acid and alkali corrosion resistance ，adaptable to the chemical composition in metallurgical waste liquid;
- High strength, wear resistance, and bending resistance ，suitable for the continuous operation of belt structures.
Taking Xiamen Citius (Xiamen Citius) Filtration Materials Technology Co., Ltd. as an example, its high-performance filter cloth specially developed for steel slag sludge dewatering uses a modified monofilament and composite structure design. It has a smooth surface and excellent filter cake stripping properties, and can HVBF achieve stable operation for 1000 hours or more. For different operating conditions, Xiamen Citius (Xiamen Citius) can also provide customized processing solutions such as anti-clogging coatings, reinforced edges, and special splicing.
Actual application results and industry trends
In applications at multiple nickel smelting enterprises in China, HVBF+ high-performance filter cloth system shows significant advantages:
- Filter cake moisture content is reduced to 40% ，facilitating transportation and metal recovery;
- The filtrate is clear, facilitating subsequent reuse or discharge that meets standards;
- The system can 24 operate continuously for hours, and a single set of equipment can process hundreds of tons of steel slag sludge per day;
- The filter cloth replacement cycle is long, significantly reducing maintenance costs.
With increasing pressure on nickel resource recovery and stricter environmental policies, efficient, safe, and green solid-liquid separation systems are becoming standard processes for nickel industry steel slag sludge treatment 。In the future, further functionalization of filter cloth materials (such as high temperature resistance, anti-corrosion coatings, and nano-micron filtration capabilities) will bring more innovative space to this field.
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