Views: 0 Author: Site Editor Publish Time: 2026-01-12 Origin: Site
In modern solid‑liquid separation processes, controlling moisture content in the filter cake is a critical performance indicator. Low moisture not only improves downstream handling and processing but also reduces disposal and energy costs. One of the most effective industrial solutions for achieving consistently low moisture content is the Rubber Belt Vacuum Filter, a continuous filtration system powered by vacuum suction and optimized mechanical design. In this article, we explore how a Rubber belt filter works, why it delivers superior cake dryness, and what features drive its efficiency across industries.
A Rubber belt filter like the Toncin DU Rubber Belt Vacuum Filter delivers high throughput and exceptional cake dewatering performance, making it ideal for mining tailings, gypsum dehydration (FGD), wastewater treatment, chemical processing, and more.
A Rubber belt filter removes moisture primarily through vacuum suction and continuous movement.
Components like the grooved rubber support belt and adjustable washing zones are critical to low moisture results.
Operational control (vacuum level, belt speed, wash strategy) further tunes cake dryness.
Compared to batch systems, Rubber Belt Vacuum Filters provide high throughput and consistent low moisture performance.
These systems are widely adopted across industries for efficient solid‑liquid separation.
A Rubber Belt Vacuum Filter is a type of continuous filtration equipment that drives solid‑liquid separation with vacuum negative pressure coupled with a moving support belt—typically made of grooved or specialized rubber—that supports the filter medium and removes filtrate.
| Component | Function |
|---|---|
| Rubber Support Belt | Supports filter cloth and conveys cake; collects filtrate through grooves |
| Filter Cloth / Media | Retains solids while allowing liquid passage |
| Vacuum Box | Applies negative pressure beneath belt to pull liquid through cake |
| Slurry Feed System | Provides even distribution onto belt surface |
| Washing Section | Applies wash liquid to cake to displace trapped moisture |
| Cake Discharge Section | Removes drier cake for downstream processing |
Unlike simple batch filters, Rubber belt filters operate continuously, producing a uniform cake with controlled moisture.
The ability of a Rubber Belt Vacuum Filter to ensure low moisture content in the filter cake arises from multiple interacting mechanisms. Below we explore the primary factors.
The core mechanism in a Rubber belt filter is the vacuum box located under the support belt. By creating negative pressure (vacuum), liquid is actively drawn through the filter media and collected in drainage channels and the vacuum box beneath. This active suction accelerates liquid removal far beyond what gravity alone can achieve.
The key impact of vacuum suction includes:
Higher driving force for liquid removal
Continuous extraction of water throughout cake formation
Reduced capillary resistance, leading to a drier cake surface
Where gravity filtration may leave significant bound moisture, vacuum draws water until the cake approaches its natural moisture limit.
Uniform slurry distribution is essential for consistent cake formation. Uneven feed can lead to variable cake thickness and trapped moisture pockets. Modern Rubber belt filters use advanced feed boxes that distribute slurry evenly across the filter width before entering the vacuum zone. This uniform feed helps form even cake layers that are efficiently dewatered.
One advantage of the Rubber belt filter design is the inclusion of cake washing stages. Typical industrial models include both co‑current and counter‑current washing, which improve moisture displacement within the cake.
In cake washing, clean wash liquid is applied to the cake surface, pushing residual mother liquor and trapped water deeper into the filter media and out through the vacuum system.
The rubber support belt not only conveys cake but also functions as a filtrate collector. Grooves in the rubber belt form drainage pathways that allow liquid to move swiftly into the vacuum chamber without resistance.
This design:
Enhances liquid collection efficiency
Reduces wet zones where moisture could stagnate
Prevents fluid backflow that increases cake wetness
The filter cloth and the rubber support belt work together to optimize the separation interface. The cloth traps solids while allowing liquid through; beneath it, the rubber belt’s skid‑free surface ensures smooth passage of filtrate to vacuum channels. Proper cloth selection and tensioning also reduce moisture retention.
Some Rubber Belt Vacuum Filters integrate mechanical wiping and scraping just before cake discharge. These mechanisms physically remove clinging moisture, pushing the cake to a lower water content before it leaves the belt. While not present on all systems, such enhancements further drive moisture reduction.
Even with advanced design, operator control plays a significant role. Key parameters include:
Increasing vacuum strength generally lowers moisture content by enhancing vacuum penetration into the cake. However, excessive vacuum can:
Stress components
Increase energy costs
Cause cloth abrasion
Operators must balance vacuum intensity against throughput needs.
Slower belt speed increases residence time under vacuum, enabling more thorough dewatering. However, slower speeds may reduce overall throughput. Modern PLC control systems balance belt speed and cake dryness automatically, maximizing productivity.
The washing section can operate in:
Co‑current washing – wash liquid flows in same direction as filtrate
Counter‑current washing – wash liquid flows opposite direction for more effective moisture displacement
Selectable wash strategies help tailor moisture control to material properties.
To understand why Rubber belt filters excel at low moisture content, it helps to compare them with other major systems.
| Feature | Rubber Belt Vacuum Filter | Filter Press | Centrifuge |
|---|---|---|---|
| Operation Mode | Continuous | Batch | Continuous |
| Moisture Content | Low (efficient vacuum + wash) | Very Low (high pressure) | Variable |
| Throughput | High | Medium | High |
| Automation | High | Medium | Medium |
| Maintenance Cost | Lower | Higher (plates, membranes) | Medium |
| Space Requirement | Moderate to Low | High | Moderate |
While filter presses may produce very low moisture with high pressure, Rubber belt filters maintain impressive dryness with continuous flow and lower operating complexity — often with lower maintenance costs and higher throughput.
Industries that benefit from low moisture cakes include:
Mining tailings dewatering
Flue Gas Desulfurization Gypsum (FGD)
Paper & pulp sludge treatment
Food & beverage processing
Chemical production
In applications like gypsum dehydration, a Rubber Belt Vacuum Filter can reduce moisture content significantly, often bringing cake moisture well below 30%, depending on slurry properties and operating parameters. These systems are designed to handle diverse slurry types while maintaining consistent moisture performance.
| Parameter | Effect on Moisture | Typical Operational Range |
|---|---|---|
| Vacuum Pressure | Lower moisture with stronger vacuum | 0.6 – 0.9 bar vacuum |
| Belt Speed | Lower moisture with slower speed | 1 – 5 m/min |
| Washing Stages | Improved water removal | 1–3 stages |
| Feed Solids | Higher solids improves dryness | 5–20% solids |
This table highlights how operators can tune conditions to influence final cake dryness.
The effectiveness of a Rubber Belt Vacuum Filter in achieving low moisture content in the filter cake lies in its sophisticated combination of vacuum suction, optimized belt cloth design, and flexible operational controls. Systems like the Rubber Belt Vacuum Filter deliver high filtration efficiency, effective cake washing, and superior dewatering — making them ideal for industrial and environmental applications. Continuous innovation in seal design, belt mechanics, and automation ensures that our products deliver stable, low‑moisture cakes while minimizing downtime and operating cost.
A: Depending on slurry type and operating conditions, Rubber belt filters can often reduce cake moisture to below 30%, with optimization.
A: Higher vacuum increases dewatering force, lowering moisture, but must be balanced against component wear and energy use.
A: Yes, co‑current and counter‑current wash stages displace trapped water, significantly lowering residual moisture.
A: Yes — with appropriate sealing and materials, Rubber Belt Vacuum Filters can handle corrosive and sensitive slurries.
A: Slower belt speeds increase residence time under vacuum, producing drier cakes at the cost of reduced throughput.
Tower/vertical press filter use air or water to form a huge pressure difference on both sides of filter cloth to achieve very efficient separation of solid and liquid.
GNZ centre drive efficient thickener is a kind of new-style solid-liquid separation equipment, and is designed by our company with the introduction of foreign advanced technology.
The rubber belt vacuum filter is a high-efficiency filtration and solid-liquid separation equipment independently developed by our company on the basis of the introduction of foreign technology of similar products.
Toncin horizontal rubber vacuum belt filter is a new-type, high-efficiency, and continuous-operation solid-liquid separation mechanical equipment developed by our company on the basis of introducing, digesting, and absorbing technologies of similar foreign products. At the same time, it is also a kind of mechanical equipment that fully utilizes the gravity and vacuum suction to achieve solid-liquid separation. In the structure, the vacuum zone is arranged in the horizontal direction, and the length of the vacuum zone can be continuously used to complete different processes such as filtration, washing, and blotting etc. It has the advantages of high filtration effect, large production capacity, good washing effect, wide application range, simple and smooth operation and convenient maintenance etc. It is particularly suitable for filtering suspension slurry with solid coarse particles, high density and filter cakes need to wash many times. It can be widely used in solid-liquid separation in metallurgy, mining, chemical, papermaking, food, pharmaceutical and environmental protection and other industrial sectors; and it particularly has a good application in the wet flue gas desulfurization gypsum dehydration (FGD).
Toncin belt filter press is a high-efficiency solid-liquid separation device based on the principles of chemical flocculation contact filtration and mechanical extrusion. It features a simple process flow, high automation, continuous operation, convenient control, and adjustable working parameters. When used in conjunction with a gravity thickener, it can eliminate the need for a material concentration tank, thereby saving construction costs to some extent. As a result, it is gaining increasingly widespread application across various industries.
Currently, the belt filter press is widely used for sludge dewatering in municipal sewage, textile printing and dyeing, electroplating, papermaking, leather, brewing, food processing, coal washing, petrochemicals, chemical industry, metallurgy, pharmaceuticals, ceramics, and other sectors. It is also suitable for solid-liquid separation or leaching processes in industrial production.
The SSPF smart row plate filter press is a fast opening and closing plate filter press which mainly consists of the electrical control system, hydraulic control system and the main engine.
ZPL series filter cloth type of disc dewatering machine has the advantages of small area, large processing capacity, low cost, easy large-scale, mature technology, reliable running and convenient operation, so it can be widely promoted in the field of desulfurization.
GNZ centre drive efficient thickener is a kind of new-style solid-liquid separation equipment, and is designed by our company with the introduction of foreign advanced technology.
GNZ centre drive efficient thickener is a kind of new-style solid-liquid separation equipment, and is designed by our company with the introduction of foreign advanced technology.
The belt filter press is one kind of solid-liquid separation equipment that is useful to separate the solid particles with size more than micron to millimeter from the liquid (water). The advantages of this equipment is highly automation, simple and easy maintenance and low labour intensity.
The belt filter press is one kind of solid-liquid separation equipment that is useful to separate the solid particles with size more than micron to millimeter from the liquid (water). The advantages of this equipment is highly automation, simple and easy maintenance and low labour intensity.
Ceramic filter plate, also known as ceramic filter, ceramic plate and filter plate, is a new filter medium made of corundum and silicon carbide by special techniques. Our ceramic filter plates have been widely used in the filter dewatering of iron concentrate, zinc concentrate, copper concentrate, nickel concentrate, aluminum concentrate, gold concentrate, and other non-metallic concentrates and the solid-liquid separation of coal, fine chemical engineering, paper, pharmaceutical, chemical fiber, food, environmental protection and other sectors.
HVPF vertical automatic press filter is the most advanced filter that the world has ever get. Vacuum has a limit, but Pressure not. HVPF vertical automatic press filter use air or water to form a huge pressure difference on both sides of filter cloth to achieve very efficient separation of solid and liquid.
Toncin horizontal rubber vacuum belt filter is a new-type, high-efficiency, and continuous-operation solid-liquid separation mechanical equipment developed by our company on the basis of introducing, digesting, and absorbing technologies of similar foreign products. At the same time, it is also a kind of mechanical equipment that fully utilizes the gravity and vacuum suction to achieve solid-liquid separation. In the structure, the vacuum zone is arranged in the horizontal direction, and the length of the vacuum zone can be continuously used to complete different processes such as filtration, washing, and blotting etc. It has the advantages of high filtration effect, large production capacity, good washing effect, wide application range, simple and smooth operation and convenient maintenance etc. It is particularly suitable for filtering suspension slurry with solid coarse particles, high density and filter cakes need to wash many times. It can be widely used in solid-liquid separation in metallurgy, mining, chemical, papermaking, food, pharmaceutical and environmental protection and other industrial sectors; and it particularly has a good application in the wet flue gas desulfurization gypsum dehydration (FGD).
The DU rubber belt vacuum filter operates by utilizing vacuum negative pressure to achieve solid-liquid separation. Its filtration section is horizontally arranged, allowing for continuous processes such as filtration, washing, blotting, and filter cloth regeneration. This equipment boasts high filtration efficiency, a large production capacity, effective washing capabilities, a low water content in the filter cake, flexible operation, and minimal maintenance costs.
GNZ centre drive efficient thickener is a kind of new-style solid-liquid separation equipment, and is designed by our company with the introduction of foreign advanced technology.
GNZ centre drive efficient thickener is a kind of new-style solid-liquid separation equipment, and is designed by our company with the introduction of foreign advanced technology.
GNZ centre drive efficient thickener is a kind of new-style solid-liquid separation equipment, and is designed by our company with the introduction of foreign advanced technology.
GNZ centre drive efficient thickener is a kind of new-style solid-liquid separation equipment, and is designed by our company with the introduction of foreign advanced technology.
GNZ centre drive efficient thickener is a kind of new-style solid-liquid separation equipment, and is designed by our company with the introduction of foreign advanced technology.
GNZ centre drive efficient thickener is a kind of new-style solid-liquid separation equipment, and is designed by our company with the introduction of foreign advanced technology.
HVPF vertical automatic press filter is the most advanced filter that the world has ever get. Vacuum has a limit, but Pressure not. HVPF vertical automatic press filter use air or water to form a huge pressure difference on both sides of filter cloth to achieve very efficient separation of solid and liquid.
Toncin GNZ centre drive efficient thickener is a kind of new-style solid-liquid separation equipment, and is designed by our company with the introduction of foreign advanced technology.
HVPF vertical automatic press filter is the most advanced filter that the world has ever get. Vacuum has a limit, but Pressure not. HVPF vertical automatic press filter use air or water to form a huge pressure difference on both sides of filter cloth to achieve very efficient separation of solid and liquid.
GNZ centre drive efficient thickener is a kind of new-style solid-liquid separation equipment, and is designed by our company with the introduction of foreign advanced technology.
Rubber filter belt is also called rubber drainage belt (vacuum belt), it is key part of vacuum belt filter(HVBF or VBF). The Carcass material of belt is PE/EE, which has excellent qualities like high strength, anti-acid/alkali/petrol/low and high temperature, and the most outstanding feature is low elongation rate under specified load, this can make sure the fabric is not easy to deform.
TC series ceramic vacuum filter is a new type high-effect, energy saving filtration equipment, using vacuum and ceramic plate with micro-holes for solid-liquid separation. The plate material is corundum, resisting to almost all temperatures, and has a long operation life. The micro-holes in plates only allows liquid to flow through but not air and solid. Filtrate is drawn through the ceramic plates as they are immersed into the slurry cabin, and cakes forms on the surface of the Plates.
Belt Filter Press sludge dewatering machine
Warranty: 1 Year
Certification: CE/ISO 9001/ IS0 14001
Capacity: customized
After Warranty Service: Field maintenance and repair service
The DU rubber belt vacuum filter is equipment that realizes solid-liquid separation with vacuum negative pressure as driving force.The equipment has the advantages of high filtration efficiency, large production capacity, good washing effect, low water content of the filter cake, flexible operation and low maintenance cost etc. It can be widely used for solid-liquid separation in the fields of metallurgy, mining, chemical, papermaking, food, pharmacy and environmental protection etc. and it particularly has a good application in the flue gas desulfurization gypsum dehydration (FGD).
The rubber belt vacuum filter is a high-efficiency filtration and solid-liquid separation equipment independently developed by our company on the basis of the introduction of foreign technology of similar products.
The rubber belt vacuum filter is a high-efficiency filtration and solid-liquid separation equipment independently developed by our company on the basis of the introduction of foreign technology of similar products.
TC series ceramic vacuum filter is a new type high-effect, energy saving filtration equipment, using vacuum and ceramic plate with micro-holes for solid-liquid separation. The plate material is corundum, resisting to almost all temperatures, and has a long operation life. The micro-holes in plates only allows liquid to flow through but not air and solid. Filtrate is drawn through the ceramic plates as they are immersed into the slurry cabin, and cakes forms on the surface of the Plates.
Ceramic filter plate, also known as ceramic filter, ceramic plate and filter plate, is a new filter medium made of corundum and silicon carbide by special techniques. Our ceramic filter plates have been widely used in the filter dewatering of iron concentrate, zinc concentrate, copper concentrate, nickel concentrate, aluminum concentrate, gold concentrate, and other non-metallic concentrates and the solid-liquid separation of coal, fine chemical engineering, paper, pharmaceutical, chemical fiber, food, environmental protection and other sectors.
Email: toncinfilter@toncin.com
The rubber belt vacuum filter is a high-efficiency filtration and solid-liquid separation equipment independently developed by our company on the basis of the introduction of foreign technology of similar products.
HVPF vertical automatic press filter is the most advanced filter that the world has ever get. Vacuum has a limit, but Pressure not. HVPF vertical automatic press filter use air or water to form a huge pressure difference on both sides of filter cloth to achieve very efficient separation of solid and liquid.
HVPF vertical automatic press filter is the most advanced filter that the world has ever get. Vacuum has a limit, but Pressure not. HVPF vertical automatic press filter use air or water to form a huge pressure difference on both sides of filter cloth to achieve very efficient separation of solid and liquid.
GNZ centre drive efficient thickener is a kind of new-style solid-liquid separation equipment, and is designed by our company with the introduction of foreign advanced technology.
Applicable Industries:Energy & Mining
Condition:New
Automatic Grade:
Automatic
Place of Origin:
Shandong, China
Brand Name:Toncin
Voltage:380V, 400V, 440V, 480V
Power:10KW-50KW
Weight:8T-128T
Dimension(L*W*H):Customized
Warranty:1 Year
After-sales Service Provided: Field installation, commissioning and training, Engineers available to service machinery overseas
Description:Solid-liquid Separation Machine
Type:Vertical Filter
Operation:Fully Automatic
Item:Complete Equipment
Applicable Industries:Energy & Mining
Condition:New
Automatic Grade:
Automatic
Place of Origin:
Shandong, China
Brand Name:Toncin
Voltage:380V, 400V, 440V, 480V
Power:10KW-50KW
Weight:8T-128T
Dimension(L*W*H):Customized
Warranty:1 Year
After-sales Service Provided: Field installation, commissioning and training, Engineers available to service machinery overseas
Description:Solid-liquid Separation Machine
Type:Vertical Filter
Operation:Fully Automatic
Item:Complete Equipment
Rubber filter belt is also called rubber drainage belt (vacuum belt), it is key part of vacuum belt filter(HVBF or VBF). The Carcass material of belt is PE/EE, which has excellent qualities like high strength, anti-acid/alkali/petrol/low and high temperature, and the most outstanding feature is low elongation rate under specified load, this can make sure the fabric is not easy to deform.
Rubber filter belt is also called rubber drainage belt (vacuum belt), it is key part of vacuum belt filter(HVBF or VBF). The Carcass material of belt is PE/EE, which has excellent qualities like high strength, anti-acid/alkali/petrol/low and high temperature, and the most outstanding feature is low elongation rate under specified load, this can make sure the fabric is not easy to deform.
The rubber belt vacuum filter is a high-efficiency filtration and solid-liquid separation equipment independently developed by our company on the basis of the introduction of foreign technology of similar products.
Ceramic filter plate, also known as ceramic filter, ceramic plate and filter plate, is a new filter medium made of corundum and silicon carbide by special techniques. Our ceramic filter plates have been widely used in the filter dewatering of iron concentrate, zinc concentrate, copper concentrate, nickel concentrate, aluminum concentrate, gold concentrate, and other non-metallic concentrates and the solid-liquid separation of coal, fine chemical engineering, paper, pharmaceutical, chemical fiber, food, environmental protection and other sectors.
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