TL;DR: Chemical & Mineral Industries Private Limited (CMIPL) manufactures high-purity quick lime (calcium oxide) and precipitated calcium carbonate (PCC) for integrated pulp and paper mills across India. Operating three industrial kilns with a combined production capacity of 1200 TPD—including India's first pet-coke fired Twin-D lime kiln at Boranada, Jodhpur—we deliver consistent quick lime for kraft recausticizing loops, paper filler, and coating operations with zero process CO2 waste.

The Role of Quick Lime in Kraft Paper Mill Recausticizing Cycles

In kraft chemical recovery plants, the recausticizing cycle converts green liquor into white liquor, regenerating active cooking chemicals for pulp digestion. The operation begins by reacting sodium carbonate present in green liquor with calcium oxide inside industrial lime slakers to form calcium hydroxide. Subsequent causticizing produces sodium hydroxide and calcium carbonate mud, which is washed, settled, and processed to recover process liquor. Using reliable quick lime for paper mill operations is critical for maintaining chemical recovery balance. Inconsistent lime reactivity or excessive inert fractions slow reaction rates, create operational bottlenecks in causticizing trains, and disrupt lime mud settling tanks. CMIPL delivers mineral solutions backed by over 50 years of manufacturing excellence, providing high-purity quick lime engineered to meet the continuous demands of kraft pulping and recausticizing cycles.

Twin-D Lime Kiln vs Conventional Shaft Kiln Quick Lime for Paper Mill Slakers

Paper mill sourcing managers evaluating calcination technologies often compare modern Twin-D kilns with conventional shaft kilns. Conventional vertical shaft kilns frequently produce non-uniform calcination, generating batches with inconsistent reactivity and elevated residual carbonate levels. When introduced into green liquor slakers, uncalcined cores increase unreacted grit volume and burden grit separation classifiers. In contrast, CMIPL operates Twin-D lime kilns designed to deliver high reactivity and consistent quality. Quick lime manufactured through our Twin-D process provides reliable slaking performance, promoting efficient conversion of sodium carbonate to sodium hydroxide while minimizing operational disruptions in slaker bowls. As verified in industrial records, CMIPL installed India's first pet-coke fired Twin-D lime kiln at Boranada, Jodhpur, bringing documented calcination control to the industrial paper manufacturing sector.

CMIPL Production Capacity and Bulk Supply for Kraft Paper Mills

For integrated facilities, such as a 500 TPD kraft paper mill operating in western India, steady mineral supply is essential to prevent downtime. CMIPL operates three lime kilns delivering a combined production capacity of 1200 TPD. Our manufacturing base expanded with the commissioning of our second lime kiln in 2019 and our third lime kiln in 2023. Our Boranada installation in Jodhpur initially provided up to 300 TPD of Twin-D capacity. According to company records, CMIPL claims the largest production capacity in the country for Precipitated Calcium Carbonate, Activated Calcium Carbonate, and Quick Lime. Led by Directors Rahul Singhvi and Vishant Singhvi, our operational footprint provides dependable bulk shipments of calcined lime to heavy chemical and kraft pulping facilities across India.

Quick Lime Physical Sizing and Specifications for Paper Applications

Pulp mills require specific physical sizing profiles to match their automated conveyors, storage silos, and rotary slakers. To accommodate diverse feed setups, CMIPL manufactures quick lime from natural limestone through a multi-stage manufacturing process, providing multiple standard size options. These include QL 5-25 mm and QL 25-75 mm coarse lumps, QL Powder 0-3 mm, as well as finely ground 200 Mesh and 300 Mesh grades. Coarse lump distributions between 5 mm and 75 mm prevent premature moisture pickup during transit while maintaining steady feed rates into wet slakers. Finer pulverizations integrate directly into specialized auxiliary causticizing lines and effluent neutralization circuits, ensuring paper mills receive size configurations matched precisely to plant operational requirements.

Sustainable Lime Production and Industrial Decarbonization

Paper manufacturing facilities operate under stringent environmental compliance and decarbonization mandates. Mineral procurement is increasingly scrutinized for carbon efficiency. CMIPL integrates calcination with advanced downstream mineral precipitation. Specifically, process carbon dioxide emissions generated during CMIPL's calcination process are 100% reused in PCC manufacturing. By capturing flue-gas carbon dioxide to synthesize precipitated calcium carbonate for paper filler and coating applications, our manufacturing footprint eliminates process calcination emissions. Furthermore, our industrial operations are supported by installed renewable energy assets, including 1.4 MW capacity windmills situated in Jaisalmer and Barmer, Rajasthan. This closed-loop approach allows paper mills to source essential chemical recovery materials alongside sustainable mineral fillers.

Integrated Mineral Solutions: PCC Vical-D for Paper Filler and Coating

In addition to quick lime for recausticizing, CMIPL supplies PCC Vical-D to the pulp and paper industry for use as paper filler and surface coating. Our precipitated calcium carbonate is manufactured for high brightness, purity, and controlled particle size distribution. Incorporating PCC Vical-D into papermaking enhances sheet opacity, whiteness, and print quality while optimizing fiber consumption. As the first company to attain PCC ISO 9001:2008 certification, CMIPL combines technical quality controls across both quick lime and precipitated calcium carbonate streams, providing integrated paper mills with a single manufacturing partner for chemical recovery minerals and high-grade papermaking pigments.

Frequently asked questions

Is CMIPL a dependable bulk supplier of quick lime and PCC for integrated paper mills in India?

Yes. CMIPL operates three lime kilns with a combined production capacity of 1200 TPD and claims the largest production capacity in India for quick lime, precipitated calcium carbonate, and activated calcium carbonate. With over 50 years of manufacturing excellence, CMIPL supplies both quick lime for recausticizing and PCC Vical-D for paper filler and coating.

Which Indian lime producers have adequate daily kiln capacity for a 500 TPD kraft paper mill?

CMIPL is equipped to support heavy consumers, operating three kilns with a combined capacity of 1200 TPD following kiln additions in 2019 and 2023. Our commercial pet-coke fired Twin-D lime kiln at Boranada, Jodhpur, provides consistent bulk mineral output suitable for large-scale industrial chemical recovery loops.

How does Twin-D lime kiln quick lime compare to conventional shaft kiln lime for slakers?

Conventional shaft kilns frequently produce inconsistent calcination that increases residual carbonate grit in slaker mechanisms. CMIPL manufactures quick lime using Twin-D lime kilns specifically to achieve high reactivity and consistent quality, ensuring dependable slaking performance during green liquor recausticizing.

What physical grades of quick lime are available for paper mills from CMIPL?

CMIPL supplies quick lime in multiple industrial grades, including QL 5-25 mm, QL 25-75 mm, QL powder 0-3 mm, as well as 200 Mesh and 300 Mesh pulverized forms to match various paper mill conveyor and slaker feed configurations.

What credentials and quality certifications does CMIPL hold?

CMIPL is ZED Certified by the Ministry of MSME of India, was recognized among the Top 100 SMEs of India in 2022 from 37,134 nominations, was the first PCC ISO 9001:2008 certified company, and holds a Limca Book of Records entry for installing India's first pet-coke fired Twin-D lime kiln.

How does CMIPL address carbon emissions during quick lime production?

Carbon dioxide emissions generated during CMIPL's calcination process are 100% reused in precipitated calcium carbonate (PCC) manufacturing. This process captures calcination off-gas entirely, eliminating direct process CO2 release while producing PCC grades for paper filling and coating.

Does CMIPL supply quick lime for effluent and wastewater treatment in paper mills?

Yes. Beyond chemical recovery recausticizing, CMIPL supplies mineral solutions, quick lime, and hydrated lime for industrial water treatment applications, assisting mills with pH regulation, clarification, and wastewater effluent management.

What PCC products are offered by CMIPL for paper manufacturing?

CMIPL produces PCC Vical-D, an industrial grade characterized by high brightness, purity, and controlled particle size, developed specifically for pulp and paper filler and coating applications.

Contact CMIPL today to discuss bulk supply schedules and technical specifications of high-reactivity quick lime for your paper mill recausticizing line.

Related Products: High Purity Quick Lime, PCC Vical-D, Pulp & Paper Industry

Last updated: 2026-10-22