Esperanto
Shqiptare
Euskara
Zulu
Latinus
Cymraeg
தமிழ்
Slovak
Slovak
Afrikaans
We Help Customers To Meet The Great Challenges Of Our Time.
VIEW PRODUCTSSame °SR, Different Paper Strength? What Your Refiner Plates May Be Doing to the Fiber
Sep 11,2026
Refiner Plate Performance Is More Than a Final °SR Number
In pulp refining, reaching the required Schopper-Riegler Degree (°SR) is important. However, the same final °SR can be achieved through different fiber-development mechanisms.
This is why paper mills should consider both the final pulp test results and what occurs inside the refiner.
Plate installation, pattern orientation, operating gap, plate condition and contamination can all influence the final refining result.
Start with the Correct Plate Configuration
Refiner plates are produced in many diameters.
Typical metric sizes range from:
Ø250 to Ø1200 mm
with common sizes including Ø300, Ø400, Ø450, Ø500, Ø600, Ø660, Ø700, Ø750, Ø800, Ø900 and Ø1000 mm.
Inch-based sizes commonly found on imported refiners include:
12", 14", 16", 20", 24", 26", 28", 30", 34", 36", 42" and 48".
1.Both plate dimensions and segment arrangement should match the specific refiner.
Installation Quality Influences What Happens During Refining
Before installation, inspect the:
Rotor/Stator Mounting Surface
Bolt Holes
Segment Seating Surface
Pulp deposits, corrosion, burrs or foreign particles should be removed.
After all segments are fitted, check whether the assembly is flat, concentric and securely fastened.
A correctly manufactured plate still requires correct installation.
2.Plate Pattern Direction Matters
Many designs distinguish between the Rotor Pattern and Stator Pattern.
If the plate incorporates a defined bar angle or pumping direction, each segment must follow the intended installation orientation.
Reversing the design can change stock movement through the refining zone and may contribute to abnormal power behavior, reduced refining effectiveness and increased vibration.
Therefore, always confirm the designated Pumping Direction before operation.
3.Protect the Refining Surfaces During Startup
Two operating practices are particularly important during startup.
First:
Never Run the Refiner Dry.
High-speed contact without pulp and liquid can create rapid frictional heating, potentially resulting in burned bars, deformation, chipping and serious plate damage.
Second, avoid closing the Refining Gap / Plate Gap too quickly.
Begin with suitable clearance. Once stock flow, consistency and operation stabilize, gradually increase loading toward the required condition.
4.Protect Refiner Plates Before the Stock Reaches Them
Refiner plate protection begins upstream.
Bolts, welding slag, metal fragments and similar contaminants entering the refining zone can strike the bars at high speed.
Suitable Magnetic Separators and heavy-contaminant removal equipment can reduce this risk.
Upstream contaminant control should therefore be regarded as part of the overall refining system.
5.Plate Wear Provides Valuable Process Information
Instead of replacing refiner plates simply because they have operated for a certain number of months, inspect their actual wear profile.
One-sided wear can indicate issues involving concentricity, bearings or installation.
Localized wear may point to foreign objects or incorrect segment seating.
Rounded bar tops can accompany declining refining efficiency.
Cracks and chipped bars require immediate assessment.
A clear difference between rotor and stator wear should lead to an examination of stock flow, plate design and operating clearance.
6.Why Two Plates Can Reach 35°SR but Produce Different Results
Suppose two refiner plate patterns both take pulp from:
20°SR → 35°SR
The final °SR appears identical.
However, Plate A may create more fiber cutting, while Plate B may produce more fibrillation.
The consequences can appear elsewhere:
Fiber Length
Fines Content
Tensile Index
Tear Index
Burst Index
Specific Energy Consumption
This means °SR should be considered together with other pulp, paper-strength and energy indicators.
7.Evaluate the Whole Refining Result
A practical assessment can be expressed as:
Refiner Plate Condition + Pulp Refining Quality + Energy Consumption
Another useful way to view the process is:
Plate Wear → Fiber Development → Paper Strength → Specific Energy Consumption
Looking at these factors together provides a more complete understanding of whether a particular refiner plate pattern is performing effectively under actual mill conditions.
Huatao Group – Refiner Plate Solutions
Single Disc Refiner Plates
Double Disc Refiner Plates
Conical Refiner Fillings
High Consistency Refiner Plates
Low Consistency Refiner Plates
Disperser Plates
Deflaker Plates
For more information and help, please contact:
Huatao Group
Website: www.huataogroup.com
Email: team3@huataogroup.com
WhatsApp / WeChat: +86 193 2210 9200
20 Tags
#RefinerPlate #PulpRefining #RefinerDisc #DiscRefiner #conicalrefinerfillings #refinerfillings #rotorandstator #deflakerplate #disperserplate #FiberRefining #FiberFibrillation #PulpAndPaper #PaperMill #PaperIndustry #Papermaking #PulpMaking #PaperMachinery #PaperTechnology #PaperStrength #RefinerPlateWear #RefiningEnergy #PulpQuality #PulpEquipment #PaperProduction #HuataoGroup
Contact Us
E-mail:
team3@huataogroup.com
Phone/WhatsApp:
+86-13331385676
Address:
NO.298 Zhonghua North Street,Shijiazhuang city, China.
Phone/WhatsApp:
Email:
Huatao Group will make every effort to supply all industry-related products you are looking for in China. Once cooperation, lifelong partner.
HUATAO GROUP
Leave Message
LINKS：