Paper Pulping Machine,Pulp Production Line,Screening Machine,Refiner

Zhengzhou Yunda Paper Machinery Co., Ltd., since 1981, is a high-tech company. With its broad portfolio of products and services, Yunda sets standards in the Pulp & Paper and Solid Waste Sorting industries. Yunda has approximately 300 employees covering business in more than 40 countries.

i-OCC

High yield, high quality, high reliability and low energy consumption.
i-CTMP

Lower investment cost, better flexibility, good pulp quality and low production cost.
I-VSP

Hhas superior performance in reducing energy consumption, controlling product cost, improving product quality and operation stability.
Engineering Design

Faithful Service, Innovative Technology

Green and Intelligent Manufacture

Yunda provides system solutions for fiber processing and pulp making, including Recycled Fiber Processing Lines, Virgin Fiber Stock Preparation Lines, High-yield Mechanical Pulping Lines (i-BCTMP), Approach Flow Systems, Bale Breaking and Sorting Systems, and Closed Screening Systems for Chemical Pulp Lines. The key products are Conveyors, Bale Breakers, Pulpers, Pressure Screens, Screen Baskets, Cleaners, Refiners, Agitators, Thickeners, Thermal Shredders (Pressurized Refiners), Pre-steaming Bins, Plug Screw Feeders, Thermal Softening Tubes, Cyclones, Reaction Towers, Bleaching Towers, and Screw Presses.

Engineering-Procurement-Construction (EPC), professional and thoughtful one-stop service for you

Yunda has enlarged its sales scope to all over the world. By solid foundation and skilled technology, professional technical talents and service team bring professional service to customers.

EPC Service

In recent years, by virtue of excellent hardware facilities, strong production and processing strength, innovative technology and improving service, Yunda has marched to EPC project field.
Genuine Fittings

Yunda offers quick supply and lightning-fast delivery of common-used components and quick-wear parts for all its complete machines and auxiliary equipment, helping save more time and create more benefits for customers.
Service Stations

Service anywhere and anytime: Telephone, email, video, on-site;Yunda has consistently adhered to the concept of "Faithful and Professional, Serve Pulp and Paper Industry"to provide users with all-round and timely services

Company News & Industry Trends

Company News | 2025/05/16
The complete set of stock preparation system and approach flow system provided by Yunda to Gansu Yusen 360,000 tons tissue paper project (Phase I) was successfully started up.
Congratulations on the successful Starting up of the Gansu Yusen TM1/TM2/TM3/TM4 tissue paper production lines on the same day! Collaborative Innovation, Shared Success On May 10, the 360,000-ton tissue paper project (Phase I) of Gansu Yusen New Materials Technology Co., Ltd. successfully commenced production with TM1/TM2/TM3/TM4 all going online! The project is equipped with four…

07

03.2026

Zhengzhou Yunda and Qian’an Boda Successfully Sign Contract for Complete Pulping Equipment for 150,000-Ton Bleached CTMP Project
Green & Low-Carbon, Serving the Pulp and Paper Industry Zhengzhou Yunda Paper Machinery successfully signed a contract with Qian’an Boda (Hebei Qian’an Boda Paper Industry Co.,Ltd.) for the complete pulping equipment of the 150,000 Tons Bleached CTMP Project.
22

02.2026

Separation processes
Efficiency range The separation processes and their efficiencies depend on suspension properties such as consistency and flake and debris content. The same processing stages may be used several times in a stock preparation line, depending on the type and quantity of contaminants, to provide better effectiveness and increased reliability of processing machinery Figure 1 shows the efficiency scatter of…
04

02.2026

General overview of unit operations
Similar to virgin fibres, recycled-fibre stock must meet defined quality criteria for a given furnish. ln this sense, quality refers to the fibre characteristics, such as the type and condition of fines, and to additives and contaminants. Recycled fibre processing systems are significantly more complex than virgin-fibre systems for two reasons. First, the recovered paper…
27

01.2026

Fluid mechanics of pulp suspensions
One basic characterisation of the rheology of a fluid is the description of the correlation between the forces acting on a fluid,f.i. in form of a pressure gradient, and the shear forces or the shear stress occurring in the fluid. If we consider a simple pipe flow as sketched in Figure 1, the driving force of…

i-OCC

i-CTMP

I-VSP

Engineering Design

Engineering-Procurement-Construction (EPC), professional and thoughtful one-stop service for you

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