Filter Conveyor Belt
Filter conveyor belts are core consumable parts tailor made for vacuum dewatering filter systems. They separate solid particles from liquid mixed slurry under vacuum suction and mechanical squeezing, playing a decisive role in filtration efficiency, cake dryness and equipment uptime. Built to stand continuous heavy duty cycling, these rubber filter belts fit most mainstream vacuum belt filter units across multiple industrial segments.
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Description
Key Features
- High tensile EP fabric carcass as base reinforcement. We can build custom fabric free sections per project requirements.
- Broad chemical tolerance: stands acid, alkali, high heat and oily medium exposure for varied slurry conditions.
- Minimal elongation under sustained working load. Resists permanent deformation, keeps stable overall dimensions. You will not see unexpected stretch after long hour continuous running, delivering steady belt tracking and smooth equipment operation.
- Reliable high temperature performance, holds physical properties under repeated thermal impact.
- Strict straightness control during production. Keeps the belt running centered; cuts down side drift, edge wear and unplanned shutdowns.
Belt Construction Details
Filter conveyor belts work inside dedicated dewatering equipment to split solids and liquids out of slurry feed.
- The top rubber cover comes with orderly arranged grooved channels for fast liquid drainage. Centered within each groove is a set of through holes. These holes route filtrate down into the vacuum box underneath.
- Drain holes are formed via rubber covered fabric free zones. This setup stops corrosive process fluid from creeping along internal fabric plies, slows ply delamination and greatly lengthens total service life.
- Multiple belt grades exist to match different material transport and filtration conditions. End users need to pick suitable belt construction based on actual slurry PH, temperature, particle composition and abrasion level.
- Drain hole fabric free zones do not come as standard for every belt model; make this request clear when you place orders.
Technical Capability & Dimension Range
Our filter conveyor belts support custom sizing to fit diverse vacuum belt filter frames.
- Working width: 0 4500 mm
- Effective length: 20 200 m
- Overall belt thickness: 20 50 mm
- Top cover rubber thickness: 10 30 mm
- Bottom cover rubber thickness: 5 15 mm
Note: Above figures cover regular production scope. We can work out non standard sizes after our technical review. Send over your equipment drawing or old belt sample for exact matching.
Main Applications
Filter conveyor belts see heavy real world deployment for process filtration across heavy industry sectors:
- Thermal power plant: flue gas desulfurization gypsum dewatering
- Chemical processing, non ferrous smelting, mineral ore processing
- Petroleum refining related solid liquid separation
- Food industry slurry filtration
- Mining beneficiation tailings dewatering
- Alumina production slurry treatment
- Papermaking pulp and waste water filter treatment
Rubber Cover Compound Options
Pick rubber compound grade based on your onsite slurry environment:
- Gneral abrasion resistant grade: for common mineral slurry, moderate particle abrasion, normal temperature working condition
- Heat resistant grade: for filtrate and filter cake with sustained high temperature
- Acid & alkali resistant grade: for slurry with strong acidic or alkaline properties
- Oil resistant grade: for feed mixed with mineral oil, hydrocarbon and oily contaminants
Why Choose Our Filter Conveyor Belts
We make filter conveyor belts in house — we are the actual factory, not middleman traders. Every step, from EP fabric preparation, rubber mixing, vulcanization through final inspection, happens inside our own plant.
- We test every incoming EP fabric roll. Tensile strength and elongation get verified before we bond rubber onto fabric. Any fabric failing specs gets rejected right away, so you won’t face unexpected stretching once the belt runs on site.
- Full custom capability. We adjust groove depth, hole spacing, hole pattern and fabric free zone layout exactly against your machine parameters or old belt samples. We do not only offer off the shelf standard items.
- Finished belt full inspection. Every completed filter conveyor belt goes through dimension measurement, straightness check and surface visual inspection before packing. This cuts fitting failures and trial run risks for end users.
- Flexible rubber formula tuning. We tweak rubber compounds for acid, alkali, heat, oil or heavy abrasion conditions, instead of using one universal rubber mix for all working environments.
- Technical support through the whole project cycle. Our engineering team helps you pick the correct belt grade when you cannot confirm material selection from your side.
Common Failure Causes & Troubleshooting
| Problem | Possible Cause | Practical Suggestion |
| Belt runs off track / wandering | Uneven tension on two sides; dirty or worn support rollers; insufficient belt straightness | Readjust bilateral tension to keep balanced; clean or replace dirty rollers; specify strict straightness requirement for new replacement belts |
| Fast wear on top rubber cover | Sharp hard particles in slurry; long time dry running; high abrasion filter cake | Switch to higher grade abrasion resistant rubber; remove hard debris from incoming slurry; avoid running machine without slurry feed |
| Ply delamination around drain holes | Acidic or alkaline filtrate seeps into internal fabric layers through hole edges | Order belts with fabric free zone around drain holes for corrosive slurry working conditions |
| Filter cake keeps high moisture content | Grooves or drain holes clogged by fine particles; mismatched belt structure for slurry particle size | Carry out periodic belt washing to clear blockages; double check groove and hole dimension before new belt purchase |
| Early rubber cracking | Continuous high temperature impact; chemical erosion; long term storage under sunlight | Select heat resistant or chemical resistant rubber formula; store spare belts in cool, shaded warehouse |
FAQ
Q1: When should I choose fabric free zone design for my filter conveyor belt?
A1: Go for fabric free zones if your slurry carries acid, alkali or other corrosive chemicals. Holes cut directly through rubber fabric layers without fabric free treatment let liquid attack EP fabric plies, causing early layer separation and short service cycles. For neutral, low corrosion materials, standard hole punch design can work for cost control.
Q2: Why does my existing filter belt keep stretching and going off track?
A2: Two common reasons. First, poor quality inner fabric carcass with high elongation rate under load. Second, improper tension adjustment during equipment installation. Our EP reinforced filter belts keep low permanent stretch. Even so, follow equipment manual for correct tension setup at commissioning.
Q3: Can you produce replacement filter belts according to my worn old belt sample?
A3: Yes. Send us old belt pieces or dimension data (width, total length, top / bottom cover thickness, groove layout, hole spacing, working medium). Our technical team can confirm compound formula and structure from these details. It helps steer clear of fitting mistakes and shortens trial run time on site.
Buying & Custom Tips
Lots of field side issues stem from picking the wrong rubber formula, not manufacturing flaws. Send over your real world operating conditions before placing orders. If you are not certain which grade fits best, just tell us about your slurry. Our engineering staff will work out the most cost effective filter conveyor belt for your vacuum dewatering filter unit.
Products
Sidewall Conveyor Belt
QBF rubber specializes in designing and manufacturing high-quality steep incline conveyor belts for bulk material lifting across industries such as harbors, metallurgy, tunneling, power plants, chemicals, cement, and metro. As the only Chinese manufacturer using full European molds and standards, QBF rubber provides complete solutions covering belt selection, production, installation, commissioning, and trouble shooting.
Pocket Type Conveyor Belt
Developed from high angle sidewall belts and high capacity bucket elevators, the Pocket Type Conveyor Belt (Pocketlift) suits underground mining, tunnels, port handling and large volume silo feeding, with lifting heights up to 800 meters.
It handles ultra high lift, high throughput tasks beyond conventional high angle sidewall belts, realizing stable continuous bulk material transportation.
It handles ultra high lift, high throughput tasks beyond conventional high angle sidewall belts, realizing stable continuous bulk material transportation.
Rope-track Sidewall Conveyor Belt
RopeTrack corrugated sidewall steel cord conveyor belt for overhead cable conveying. ST10000 high strength, 25000 t/h throughput for mine, quarry & complex terrain long distance bulk transport. Custom engineering available.
Bucket Elevator Conveyor Belt
Bucket elevator conveyor belts are cost effective core components for vertical bulk material handling, supporting lifting heights over 100 meters. Reinforced with high grade tear resistant polyester canvas or optional steel cord anti tear layers for heavy duty use.
They deliver low elongation, high throughput and stable operation with easy maintenance, helping operators reduce downtime from belt failures and frequent replacements.
They deliver low elongation, high throughput and stable operation with easy maintenance, helping operators reduce downtime from belt failures and frequent replacements.
Pipe Conveyor Belt
Pipe conveyor belt (tubular conveyor belt) folds into a closed tube in operation, fully containing bulk materials to eliminate spillage and dust emissions while shielding cargo from external contamination.
Supporting sharp horizontal and vertical bends, it meets strict environmental requirements and helps plants remove redundant transfer points, favored by operators troubled by on site dust and leakage issues.
Supporting sharp horizontal and vertical bends, it meets strict environmental requirements and helps plants remove redundant transfer points, favored by operators troubled by on site dust and leakage issues.
Chevron Conveyor Belt
Chevron conveyor belt, fitted with raised chevron cleats, is designed for steep angle conveying to prevent bulk material sliding and fallback, an issue common for smooth flat belts.
Various chevron patterns are available for different slope demands. Widely used in mining, farming, construction and recycling, it maintains stable performance under harsh on site working conditions.
Various chevron patterns are available for different slope demands. Widely used in mining, farming, construction and recycling, it maintains stable performance under harsh on site working conditions.
Recent news
Sidewall Conveyor Belt Sagging Solutions: QBF rubber Free Zone Base Belt Design Extends Service Life by 30%
Sep 18, 2026
According to industry statistics, up to 80% of sidewall conveyor belt failures occur due to rigidity loss–induced sagging during operation. QBF rubberaddresses this root cause with an innovative “free zone ” base belt design, significantly extending the service life of sidewall conveyor belts.
What Is Belt Sagging and Why Does It Shorten Belt Life?
Under heavy load, especially on the return run, the base belt often sags due to insufficient transverse rigidity. This sagging triggers a chain of serious issues:
Stress concentration – Sagging causes abnormal flexing at the sidewall root as it passes over the drum, concentrating stress in a localized area.
Fatigue cracking – Repeated flexing leads to fatigue cracks at the sidewall root, which can develop into through-wall damage.
Baffle detachment – Vibration and deformation from sagging transfer to the baffle connection, accelerating adhesive aging and causing baffle loosening or separation.
Once sidewall tearing or baffle detachment occurs, the entire sidewall conveyor belt often fails prematurely. Therefore, solving the sagging problem is the key to extending belt service life.
Root Cause of Belt Sagging
The core cause of sagging lies in structural deficiencies of traditional base belt designs:
Insufficient transverse rigidity – Traditional base belts cannot maintain a flat profile under heavy loads or long-span conditions.
Unbuffered stress transfer – The sidewall-to-base belt connection lacks a flexible transition, so abnormal sagging stress directly impacts the sidewall root.
Accelerated fatigue accumulation – Repeated flexing at stress concentration points causes cracks to grow from micro to macro levels.
Understanding these causes makes it clear: simply increasing sidewall thickness or changing the rubber compound is a temporary fix. The solution must start with the base belt structure.
Solution: QBF rubber Free Zone Base Belt Design
QBF rubber introduces a “free zone ” base belt design to directly target the root cause of sagging.
How the free zone Works
Blocks stress transfer – The free zone acts as a stress buffer, absorbing and isolating abnormal sagging stress before it reaches the sidewall root.
Dissipates flexing energy – The flexible edge allows the base belt to adaptively deform as it passes over the drum, spreading concentrated flexing over a larger area.
Protects sidewall and baffles – By mitigating the extra load caused by sagging, the risk of fatigue tearing at the sidewall root is greatly reduced, and the baffle adhesive layer no longer suffers excessive vibration stress.
Key Advantages of the free zone Design
Advantage
Result
sidewall tear resistance
Eliminates stress concentration points; fatigue life extended by 2–3 times
Baffle detachment risk
Smoother operation; significantly slower adhesive aging
Overall belt service life
Comprehensive service life increased by 30% or more
QBF rubber’s Free Zone Base Belt design achieves a leap from “reacting to sagging consequences” to “eliminating the root cause of sagging.”
Summary: Eliminate Sagging at the Source for Longer Sidewall Belt Life
The sagging problem in heavy-duty sidewall conveyor belts originates in the base belt structure. QBF rubber’s free zone design solves this industry pain point by blocking stress transfer, dissipating flexing energy, and protecting both sidewall and baffles.
If you are experiencing frequent sagging, sidewall tearing, or baffle detachment with your sidewall conveyor belt, contact QBF rubber for professional technical support and customized solutions.
READ MORE
QBF Rubber Anti-stick Sidewall Belting Helps Shenzhen Tunnel Construction
Sep 18, 2026
The customized S400 B1800 TCS360 anti-stick Sidewall Belt — developed by QBF Rubber for the Shenzhen Tunnel Project — is now under installation! With a total length of 190m, this high-performance non-stick belt is set to play a crucial role in ensuring smooth and efficient tunnel construction.
More Than Just a Product – Full-Service Support!
Our after-sales team is fully committed to providing:
✔ Tailored installation plans
✔ Professional on-site guidance
✔ Hot vulcanization splicing services
✔ Comprehensive commissioning & operation support
Every step is meticulously handled to ensure flawless performance of the sidewall belt!
Technology + Service Facilitate Tunnel Construction
“This cooperation reflects QBF rubber’s R&D strength and service capability in the field of special conveyor belts,” the project manager said, “The application of the anti-stick sidewall conveyor belt will significantly improve the conveying efficiency, reduce the downtime for maintenance, and provide key support for the project to be pushed forward on schedule.”
In the future, QBF rubber will continue to focus on technological innovation and customer needs to provide more efficient and durable conveyor system solutions for global infrastructural projects.
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Mining Vertical Lifting System Solution: Tackling Continuous Conveying Challenges for Deep-Mine Operations
Sep 17, 2026
As mining operations go deeper, vertical lifting efficiency and safety have become major constraints on mine output. Designed for deep shafts, inclined shafts and complex terrain, our vertical lifting system works across 0 500 m vertical heights and supports steep angle, long distance material transport. Thanks to modular design, high throughput and full lifecycle services, it has gained wide attention in the mining material handling industry.
Three Core Solutions for Varied Lifting Applications
Our portfolio includes three main product lines to cover diverse vertical transport demands.
Steep Angle Sidewall Conveyor Solution
Engineered as an alternative to conventional mine cages, this solution handles vertical heights from 0 m to 500 m. In inclined shaft conditions, throughput can exceed 10 000 tons per hour. It overcomes the low efficiency, intermittent nature of cage hoisting and enables fast, continuous material transfer from underground to surface.
Pocket Type Vertical Lifting System
Optimized for high height, high volume tasks, this system is ideal for muck removal shaft main lines and blind shaft intermediate transfer. Proven in tunneling projects, it runs stably above 250 m lift height with capacities over 800 m³/h. It fills performance gaps under tight space conditions and can reach lifting heights over 500 m.
Long Distance Rope track Conveying System
Boasting single spans beyond 2 000 m, this system serves mountain and river valley sites. It reduces transfer points, cuts energy consumption and lowers overall maintenance costs for difficult terrain material haulage.
Full Chain “EPC+M+O” Service Model
Beyond equipment supply, Bairui provides a complete EPC+M+O service package:
E (Evaluation & Custom Design): Custom engineer conveyors and belts based on mine geology, production targets and existing site infrastructure.
P (Core Equipment Manufacturing): In house production of sidewall belts, lifting pockets and drive units for reliable quality and on time delivery.
C (Installation Guidance): On site technical support for installation and commissioning to ensure smooth startup.
M (Operation Management): Partial or full operational outsourcing to help mines hit production targets quickly.
O (Smart O&M): Condition monitoring and predictive maintenance platform for early fault warnings and optimized maintenance schedules.
Key Benefits vs Traditional Lifting Equipment
For shafts deeper than 500 m, traditional multi rope friction hoists suffer from short rope life, batch type loading and complex controls. The Steep Angle Sidewall Conveyor Solution fits compactly within limited shaft space. Its continuous output connects directly to processing plants or silos, eliminating intermediate stockpiles and re handling expenses.
In tunnel construction, the Pocket Type Vertical Lifting System features small turning radii and steep climbing performance. It has replaced imported equipment on multiple inclined shaft tunnel projects, delivering local manufactured cost savings. It requires minimal maintenance space and tolerates heavy dust and poor water conditions.
Field Proven Project Experience
Our solutions are operational across global metal mines, coal mines and large tunneling infrastructure. China’s first 255 m mine used vertical lifting system is now in service, boosting vertical conveying efficiency by over 10× with safe, energy saving and eco friendly operation.
September Global Exhibition Roadshow
This September, Bairuifu will attend four key mining expos across Central Asia, Africa and China to showcase our full vertical lifting portfolio and EPC+M+O service model. Industry professionals are welcome to visit our booths for technical exchanges.
Exhibition Schedule
Mining World Central Asia 2026
Sep 16 18, 2026｜Atakent International Exhibition Centre, Almaty | Booth: 11 307
Electra Mining Africa 2026
Sep 7 11, 2026｜Johannesburg Expo Centre | Booth: P10
The 28th China Mining Conference and Exhibitlon
Sep 10 12, 2026｜Meijiang Convention and Exhibition Center, Tianjin | Booth: N2 2607
The 20th Yulin International Coal and High-end Energy Chemical Industry Expo
Sep 13 15, 2026｜Yulin Convention & Exhibition Center| Booth: H342 / H335
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