Sugar Industry
IS 712 certified Ca(OH)₂ in Industrial & Premium grades — trusted by sugar mills across Uttar Pradesh, Maharashtra, Karnataka, and pan-India for consistent juice clarification and maximum sugar recovery.
Hydrated lime (calcium hydroxide, Ca(OH)₂) is an essential process chemical in every sugar mill in India. It is used in the defecation process — the first and most critical step in raw cane juice clarification — where lime raises the pH of the juice to precipitate impurities before evaporation and crystallisation.
The quality of hydrated lime used in a sugar mill directly affects sugar recovery rates. Inconsistent purity, high moisture content, or poor fineness leads to incomplete clarification, higher colour in the juice, increased lime consumption, and ultimately lower sugar yields. Choosing a reliable, quality-consistent hydrated lime manufacturer is a direct investment in your mill's profitability.
In the defecation process, hydrated lime is added to raw cane juice to raise its pH to approximately 7.0–7.2. At this pH, proteins, waxes, gums, and colour bodies coagulate and precipitate as calcium salts. The clarified juice (clear juice) is separated from the mud (filter cake) in clarifiers and vacuum filters. The quality of this clarification step determines the colour and purity of the final sugar.
In the sulphitation process (used for producing white/refined sugar), hydrated lime and sulphur dioxide (SO₂) are used together. Lime is added first to raise pH, followed by SO₂ to bleach the juice and reduce colour. The lime quality — particularly its purity and fineness — determines the efficiency of this combined treatment.
In the carbonatation process (used in refined sugar production), excess lime is added to the juice, followed by CO₂ gas to precipitate calcium carbonate. The CaCO₃ acts as a filter aid, adsorbing colour bodies and impurities. This process requires high-purity hydrated lime to ensure complete precipitation and effective colour removal.
Throughout the evaporation and crystallisation stages, pH control is critical to prevent sucrose inversion (breakdown of sucrose into glucose and fructose). Hydrated lime is used to maintain the correct pH range, protecting sugar yield and quality.
Hydrated lime is used in the treatment of press mud (filter cake) and sugar mill effluent. Lime stabilises the press mud for use as organic fertiliser and treats the high-BOD effluent from the mill to meet CPCB discharge standards.
| Application | Recommended Grade |
|---|---|
| Defecation (raw sugar production) | Industrial (80–85%) |
| Sulphitation (white sugar) | Premium (88–92%) |
| Carbonatation (refined sugar) | Premium (88–92%) or Ultra (93–95%) |
| Juice pH control | Industrial (80–85%) |
| Effluent treatment | Standard (70–75%) |
Sugar mills cannot afford inconsistent lime quality. Our in-house laboratory tests every batch before dispatch. Batch-wise test reports available with every shipment.
Moisture content controlled below 2% (IS 712 requirement). Dry, free-flowing lime ensures accurate dosing and prevents clumping in lime preparation systems.
IS 712 fineness compliance ensures fast dissolution in lime preparation tanks and complete reaction in the defecation process — reducing lime consumption and improving clarification efficiency.
Sugar mills operate seasonally (October–April crushing season). We plan supply schedules to ensure uninterrupted lime availability throughout your crushing season.
IS 712 test certificates provided with every shipment. Supports your quality documentation and audit requirements.
Direct manufacturer pricing for sugar mills. Volume discounts for seasonal contracts. Transparent quotes with freight and payment terms.
Tell us your grade, monthly requirement, and delivery location. We respond within 2 hours with a detailed price quote.