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Sugar is made using the sugar beet plant, the plant root has a high concentrate of sucrose and is commercially grown for sugar production.

Lime is an important component in sugar production and is used at the juice purification stage of the process to extract as many impurities or non-sugars in the juice of sugar beets leaving only pure sucrose. The main raw materials used in the purification process are lime and carbon dioxide gas, which are got by burning limestone in a kiln. These substances are then added to the juice causing non-sugars to be precipitated out of the solution. The solid material is then filtered off, and after juice purification the juice has a light yellow colour.

Specifications for Limestone in Sugar Production

A high calcium limestone is essential for sugar production, with a low level of impurities. The production of sugar from sugar beet requires approx. 200kg of CaO per tonne of sugar.

McGraths Congcal Limestone is ideal for sugar production

  • Very high purity (99% CaCO3) with minimal levels of heavy metals and impurities
  • Low levels of impurities will help reduce the amount of sludge produced
  • Low levels of toxic substances which could potentially pass onto the sugar products. (arsenic, cadmium, dioxins etc.)
  • High calcium CaO can be produced from our limestone
  • Very low decrepitation when calcined in a kiln
  • Material is uniform in size (almost zero fines content)
  • Shape of the crushed limestone lumps is suitable for use in vertical kilns. Combustion gases can pass freely through the kiln when it is charged with our material because of the uniform shape of the material (No flaky/plate shaped stones)
  •  High reactivity CaO can be produced from our limestone (t60 less than 60 seconds). This material is easily slaked with water to produce calcium hydroxide with a high surface area
  • Los Angeles Test (LA) The complete test is detailed in BS EN 1097-2, under the title Methods for the determination of resistance to fragmentation. The results for our LA tests are 24

Please contact CongCal Calcium Carbonate directly on 00353 94 955 3900 to discuss your requirements and our technical team will work on meeting the optimal solution.


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