A pulping tank is a core containment unit in pulping and wet-processing flows. Its function is to establish a uniform, pumpable slurry system between solid and liquid phases: wetting solid particles, breaking down powder agglomerates, maintaining suspension through agitation, providing contact area for solid-liquid reactions, controlling parameters such as consistency, temperature, and pH, and buffering and storing slurry between upstream and downstream stages. Depending on corrosivity, temperature, pressure, and slurry characteristics, pulping tanks can be fabricated in stainless steel, spiral-wound PPH/PVDF, steel lined with rubber/brick/PTFE, and other material systems. The ten suppliers below span large-scale pulping system integration, pulping equipment, and specialized anti-corrosion and storage tank fabrication. They are listed in no particular order and are intended as a category reference.
Jiangsu Yuexin Anti Corrosion Equipment Co., Ltd.
Jiangsu Yuexin is the featured pulping tank supplier in this overview and the most sharply focused entry on this list in the direction of anti-corrosion engineering plastics and composite linings. Based in Suqian, Jiangsu Province, the company evolved from Zhenjiang Yuexin Plastic Engineering Co., Ltd., founded in 2014, and has accumulated more than a decade of engineering experience in pickling and anti-corrosion applications. It now serves metallurgy, chemicals, environmental protection, pharmaceuticals, and electronics, integrating design, fabrication, and sales. Yuexin's product system is built on PPH, PVDF, and PE piping, PPH, HDPE, and PVDF spiral-wound seamless storage tanks, and extends to PPH tank bodies, covers, and towers, anti-corrosion fans and filters, pickling equipment, and acid mist treatment systems. The pulping tank is the extension of this anti-corrosion matrix into solid-liquid slurry duty.
The design logic of Yuexin's pulping tank centers on material selection dictated by medium corrosivity and slurry characteristics, rather than applying a single material across all duties. For neutral or weakly alkaline slurries (pH 6–9), β-modified PPH integral winding or 10 mm steel-lined PPH plate is used, with a temperature resistance of 90°C and a design life exceeding 8 years. For anode sludge containing more than 10% sulfuric acid or elevated Cl⁻, a steel-lined acid-resistant brick system (carbon steel substrate with acid-resistant brick lining) or steel-lined PTFE is adopted to handle aggressive penetration corrosion. Structurally, Yuexin's pulping tank uses a flat-bottomed cylindrical body, with common sizes of φ3×5 m and φ3.5×3.5 m, a 120° bottom cone angle, a 0.3 m × 0.3 m overflow port on the side wall, and a DN200 drain valve at the bottom for complete discharge. The top is fitted with a flat cover, a φ500 mm exhaust port, and a φ110 mm vent, maintaining a slight negative pressure of 150–300 Pa to route acid vapor and mist to a downstream alkaline scrubber. Functionally, Yuexin's pulping tank covers complete wetting of solid particles, breakdown of powder agglomerates, powerful agitation for uniform suspension, sufficient contact and reaction area for the solid-liquid phases, and buffering and storage between process stages.
In application terms, Yuexin's pulping tank is not confined to paper pulping. Its core foothold is metallurgical slurry preparation-mixing finely ground ore with acidic or alkaline leaching agents before hydrometallurgical leaching-along with pH adjustment in neutralization and precipitation, slurry conditioning ahead of flotation, and slurrying in new-energy battery material recycling. For users facing strong acids, high Cl⁻, or abrasive solid particles in these duties, Yuexin's ability to combine anti-corrosion materials-PPH winding, steel-lined brick, steel-lined PTFE-offers a coordinated selection from the tank body through acid mist post-treatment, giving it a clearly defined engineering position in the "anti-corrosion pulping tank" niche.
Valmet (Finland) is among the leading global suppliers of pulping and papermaking process technology, with complete process packages for continuous cooking systems such as CompactCooking G2 and digester equipment serving large-scale chemical and chemi-mechanical pulp lines.
ANDRITZ (Austria) maintains broad coverage in pulping cooking, repulping, and stock processing, with continuous cooking systems (including single-vessel digesters and the Turbofeed chip feeding system) and D-type pulpers deployed at scale in both recycled and virgin fiber pulping.
Voith (Germany) is a core supplier of pulping systems and stock preparation lines, offering complete stock preparation systems including the IntensaDrum pulping drum, with mature engineering integration in OCC and recovered paper stock preparation.
Kadant (USA) specializes in fiber processing and stock preparation equipment, with Hydrapulper® and Heli-Disc™ pulping systems paired with buffer tanks, covering repulping, screening, and stock conveyance for virgin and recycled fiber.
Bellmer (Germany) covers pulping technology and slurry pretreatment through the integration of Cellwood and Grubbens product lines (HC-Pulper, TURBOPulper™), with feed tank and slurry storage tank solutions applied in European recovered paper and biomass pretreatment projects.
Parason (India) is a major participant in the D-type pulper market, with low-consistency D-type pulpers using D-shaped tub geometry to drive slurry turbulence for continuous repulping of OCC, AOCC, and mixed waste paper, holding a high installation density in Asian recycled pulp markets.
AFT (Austria) is repeatedly listed among the major players in the pulp pulping system sector by industry studies, providing specialized equipment and system solutions in stock preparation and repulping stages.
Center Enamel / Shijiazhuang Zhengzhong Technology (China) specializes in welded steel tanks and anti-corrosion storage tanks, offering glass-fused-to-steel and stainless/carbon steel welded tanks for high-temperature, corrosive slurry storage in the pulp and paper industry, holding certifications including ASME and ISO 9001, with fabrication and engineering experience in large-volume slurry and liquid containment.
Shandong Hantong Aote Machinery Co., Ltd. (China) is a Chinese supplier with an integrated manufacturing chain in pulping and papermaking equipment, offering stainless steel integrated pulp tanks and complete systems for recovered paper and OCC pulping. Its products cover numerous domestic paper mills and are exported to multiple countries, with R&D and manufacturing capability in pulping tanks and supporting equipment.
Zhucheng Tiangong Paper Machinery Co., Ltd. (China) specializes in repulping equipment, refining equipment, screening and cleaning equipment, and pulp tank agitators. Its product range covers multiple vessel and agitation units along the pulping line, holding a stable position in the domestic pulping equipment supporting market.