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IS 1861:2000 (Part 1) is the Indian Standard (BIS) for guide for the manufacture of lime in vertical mixed-feed type kiln, part 1: from lime-stone. Provides guidelines for manufacturing building lime from limestone using a vertical mixed-feed type kiln. It outlines requirements for raw materials, fuel properties, kiln design proportions, and standard operational practices for efficient calcination.
Guide for the manufacture of lime in vertical mixed-feed type kiln, Part 1: From lime-stone
Overview
Status
Current
Usage level
Specialized
Domain
Materials Science — Building Limes and Gypsum Products
EN 459-1:2015CEN (European Committee for Standardization), Europe
MediumCurrent
Building lime - Part 1: Definitions, specifications and conformity criteria
Specifies the final product properties that the manufacturing process guided by IS 1861 aims to achieve.
ASTM C911-18ASTM International, USA
MediumCurrent
Standard Specification for Quicklime, Hydrated Lime, and Limestone for Chemical Uses
Provides specifications for quicklime, setting quality targets for the manufacturing process described in IS 1861.
ASTM C25-17ASTM International, USA
LowCurrent
Standard Test Methods for Chemical Analysis of Limestone, Quicklime, and Hydrated Lime
Provides the analytical test methods essential for quality control during the manufacturing process outlined in IS 1861.
Key Differences
≠IS 1861 is a prescriptive 'guide' for a specific manufacturing process (vertical mixed-feed kiln), including operational parameters and kiln design suggestions.
≠International standards like EN 459-1 and ASTM C911 are performance-based 'specifications' for the final lime product, leaving the choice of manufacturing technology to the producer.
≠IS 1861 provides specific recommendations for fuel quality (e.g., coke ash content < 24%) as it directly impacts the final product in a mixed-feed kiln. International product specifications do not cover manufacturing inputs like fuel.
≠The classification of lime differs. EN 459-1 uses a detailed system based on chemical composition and physical properties (e.g., CL 90, DL 85), whereas IS 1861 refers to an Indian classification system (e.g., Class C) based primarily on CaO content and origin.
Key Similarities
≈Both the Indian guide and international standards emphasize the critical importance of using high-purity limestone as the primary raw material to produce high-quality quicklime.
≈The fundamental goal of the manufacturing process in IS 1861 is to produce lime meeting specific chemical criteria (high available CaO, low impurities), which aligns with the chemical requirements of international standards like EN 459-1 and ASTM C911.
≈IS 1861's guidance on controlling calcination temperature (900-1100°C) to prevent over-burning or under-burning reflects the universal principle needed to meet physical properties like reactivity, which are specified and tested under international standards.
≈Both frameworks mandate quality control. IS 1861 recommends regular sampling and testing of the product, which is analogous to the conformity assessment and quality assurance procedures required by standards such as EN 459-1.
Parameter Comparison
Parameter
IS Value
International
Source
Lime Purity (High-Calcium Quicklime)
> 85% CaO (for Class C quicklime as per referenced IS 2095)
≥ 90% (CaO + MgO) (for CL 90 quicklime)
EN 459-1:2015
Sulphate (SO3) Content
≤ 2.0% (for Class C quicklime)
≤ 2.0%
EN 459-1:2015
Magnesia (MgO) Limit for High-Calcium Lime
Not explicitly limited, but part of overall composition.
≤ 5% (for 'CL' designated high-calcium limes)
EN 459-1:2015
Recommended Burning Zone Temperature
900 °C to 1100 °C
Not specified in product standards, but aligns with universal chemical engineering principles for calcination.
General Engineering Principle
Limestone Purity Recommendation
> 90% CaCO3 recommended for best quality lime.
No specific value for raw material, but high purity is implied to achieve final product specifications.
EN 459-1:2015
Degree of Calcination (Unburnt Material)
≤ 5% Loss on Ignition (for Class C quicklime)
≤ 5% Loss on Ignition (at 950°C)
ASTM C911-18
Fuel Recommendation (Ash Content in Coke)
Should not exceed 20-24%
Not applicable. Product standards do not specify manufacturing process inputs.
N/A
⚠ Verify details from original standards before use