Rajshree Group delivers complete turnkey chemical pulping systems based on the Kraft (sulphate) and sulphite processes. Chemical pulping dissolves lignin to release strong, long wood fibres — producing pulp with exceptional strength properties ideal for high-quality paper and board manufacturing.
Product Overview
Our systems are designed for softwood, hardwood, and agro-based raw materials.
Key Features
- ✓Chip bin with metering conveyor
- ✓High-pressure continuous or batch digesters
- ✓Blow tank and knotter system
- ✓Brown stock washer (drum or press type)
- ✓Oxygen delignification stage
- ✓Chemical recovery integration
- ✓Black liquor evaporation system
- ✓White liquor preparation plant
Applications
- Kraft paper and board manufacturing
- Bleached pulp for writing paper
- Specialty paper grades
- Dissolving pulp for viscose
- Packaging paper grades
Our Turnkey Project Process
We understand your requirements, site conditions, and budget to prepare a detailed feasibility report.
Complete process design, P&IDs, civil layout, electrical single lines, and equipment specifications.
In-house and vendor-sourced equipment manufactured, quality-inspected, and dispatched on schedule.
Our engineers supervise erection, electrical, instrumentation, and commission the plant to design parameters.
Hands-on operator training, performance guarantee trial, and ongoing technical support for the life of the plant.
Get a Free Quote
Tell us your capacity requirement and we'll send a detailed technical and commercial proposal within 48 hours.
Request a Quote →Contact Our Experts
📍 Branch Office: 1913 Gunbarrel Road, Suite 105 Chattanooga, TN 37421, USA |
📍 Branch Office: D7, Varsity Chateau, Uniport Road Aluu, Port Harcourt, Rivers State, Nigeria |
Why Choose Rajshree?
- ✅ 20+ years industry experience
- ✅ 22+ successful projects delivered
- ✅ Serving India, Africa & Middle East
- ✅ Complete turnkey — single point responsibility
- ✅ After-sales support and spare parts
- ✅ Competitive pricing and financing options
Kraft vs Sulphite Pulping: Choosing the Right Chemistry for Your Mill
Chemical pulping is the backbone of premium paper manufacturing. The choice between kraft (sulphate) and sulphite chemistry determines your raw material flexibility, pulp strength profile, bleachability, and chemical recovery economics. Rajshree Group's process engineers work with you to evaluate both options against your specific fibre source, target paper grade, and investment budget.
Kraft pulping — using sodium hydroxide (NaOH) and sodium sulphide (Na₂S) as cooking liquor — is the globally dominant process for a reason: it handles nearly all wood species and many agro-fibres, produces strong pulp with excellent bonding properties, and allows efficient chemical recovery through the Tomlinson recovery boiler cycle. Sulphite pulping, using sulphurous acid and bisulphite, produces brighter pulp with better absorbency — ideal for tissue, dissolving pulp, and specialty applications.
Rajshree has designed and commissioned both kraft and sulphite pulping lines across India, Africa, and the Middle East. Our in-house process simulation tools model delignification kinetics and H-factor to predict pulp quality outcomes before a single piece of equipment is ordered — reducing commissioning risk and shortening the time to stable production.
Rajshree's chemical pulping designs include full mass and energy balance calculations, white liquor preparation sizing, cooking liquor impregnation analysis, and kappa number prediction across the digester cycle. This engineering depth ensures your mill achieves target pulp quality from the first production run.
Frequently Asked Questions
Countries We Serve
Rajshree Group supplies and installs our Chemical Pulping — and complete pulp & paper mill machinery — for mills across India, Africa and the Middle East, with sea-freight delivery, on-site erection, commissioning and after-sales support in every market we serve.