Detailed Project Report (DPR) on slaked lime

Hydrated lime is mainly used for water and sewage treatment, pH adjustment, and industrial chemical processing. In water treatment, it can act as a flocculant and help remove fine particles. It is also used to increase the pH of acidic water and reduce the risk of corrosion in piping. In the paper industry, calcium hydroxide participates in the causticizing process used to produce sodium hydroxide during pulp manufacture. Its relatively low cost and low toxicity also support its broad industrial use.

Hydrated lime requires careful handling because it can cause irritation or corrosive injury to the skin and eyes and can create hazardous dust during handling. Contact with moisture or moisture-containing contaminants can also trigger an exothermic reaction. Severe inhalation exposure can cause serious respiratory effects. Industrial facilities should therefore use appropriate containment, dust-control measures, operator protection, and storage practices, with airtight connections where practical to limit material escape and contamination.

Hydrated lime can present flow and conveying challenges such as rat-holing, bridging, sticking, flooding, and buildup inside conveying lines. Its handling characteristics can vary even when bulk density is similar. Equipment should therefore be selected according to the actual material characteristics and process requirements. Appropriate hopper geometry, agitation or fluidization, suitable conveying-line design, limited bends, controlled conveying velocity, and correctly selected screws or pneumatic conveying equipment can help maintain reliable material flow.

Hydrated lime should be stored and transferred in equipment designed to limit moisture exposure, dust release, contamination, and flow problems. Bulk-bag systems may use spring-loaded frames and bag-activating devices to improve discharge, while receiving hoppers may require vibrators, air fluidizers, or mechanical agitators. Smaller bags can be handled through bag-breaking stations equipped with dust hoods and filtration. Conveying systems should also be designed to minimise buildup and maintain controlled material flow.

Limestone is the stated raw material associated with the production of slaked lime in the report. The production route involves quicklime, or calcium oxide, being mixed with water to produce calcium hydroxide. Industrial production therefore requires appropriate preparation and handling of the lime material as well as controlled hydration conditions. The quality and characteristics of the raw material and intermediate quicklime can influence the properties and handling behaviour of the resulting hydrated lime.

The report states a plant capacity of 200 Ton/Day and a Total Capital Investment of Rs. 23.04 Cr. The reported cost estimation also includes Land & Building (8130 sq.mt.) at Rs. 5.12 Cr, Plant & Machinery at Rs. 4.54 Cr, and Working Capital for 3 Months at Rs. 12.94 Cr. The report further states a Rate of Return of 28% and a Break Even Point of 54%. These figures are reproduced exactly as provided and are not independently recalculated.