Application

Manufacturing the finest products is our passion which has motivated us to set up manufacturing facilities which over the years has earned us a good reputation. Our complete integrated setup of Limestone quarries, Lime Kilns and Hydrated Lime Plants facilitate us in delivering top-quality products and, it is this world- class technology that has made us synonymous with Excellence.

Steel Industry

Steel plays a crucial role in the automotive industry, construction, and the country’s economy and security. In steel manufacture, Sigma’s Quick Lime acts as a flux in purifying steel. It is also used in metallurgical plants and refractories, thus making it integral to metal manufacturing.

Paper Industry

Lime is a primary raw material for the paper and pulp industry. Quicklime and Hydrated Lime are essentially required to manufacture pulp and paper to enhance paper quality by maximizing its opacity.

Chemical Industry

Lime contributes to a great deal to the chemical industry. Sigma’s Premium Products, Pride and Pearl, have found application in manufacturing fine chemicals.

Road Building

Lime stabilizes the in-place soils, borrow soils, or aggregate used in road building. Hydrated Lime helps form an impermeable base, reducing the chances of rainwater seepage.

Leather Industry

Since time immemorial, Lime has been used for dehairing and plumping hides preparatory to leather tanning. A cleaning agent in the leather manufacture process, Hydrated Lime is used to remove raw skin and thus obtain clean leather.

Flue Gas Treatment

Lime is crucial in eliminating pollutants from fuel-gas streams of coal-fired power plants, incinerators and industrial facilities. Hydrated Lime treats flue gases before they are released into the atmosphere.

Sugar Industry

Hydrated Lime and Quick Lime are essential to sugar production from sugar cane and sugar beet. It is used for the removal of dirt, puma and pH correction. Other forms of sugar- sorghum, levulose, and dextrose also require Lime in their refinement.

Dairy Industry

Lime is one of the alkalis used to balance the acidity in the cream prior to pasteurisation. Hydrated Lime is added to fermented skimmed milk to create calcium lactate, which is either marketed as a drug or further acidified to create lactic acid.

Paints & Pigment Industry

Hydrated Lime is the source of all precipitated calcium carbonate, a common paint pigment. It also serves as a filler and is used in the production of cement paints. 

Agricultural Uses

Hydrated Lime is popularly used to raise the soil pH level and increase crop yield. It is also used to improve the physical structure of the soil by reducing surface crusting. Additionally, it is utilised for composting, fertilisers, animal waste disposal, and soil liming.

Lubricant

Hydrated Lime is used during Plastic extrusion as a lubricant in petroleum refining and also lubricating grease manufacturing process.

Glass Industry

Limestone and Quicklime are fluxes of glass. There is no substitute for liming materials in glass when colour is important

Construction Industry

As a building material, Lime is one of the oldest- probably only antedated by stone and mud. Lime has long been used in the construction industry to make mortar and plaster, serving as a binder in these substances. During the hardening process, the Lime combines with carbon dioxide from the air to form rock-like calcium carbonate, while water is released by evaporation. Hydrated Lime is used to make a special kind of mortar that hardens under water. Besides this, Quick Lime Powder is also used immensely for manufacturing AAC Blocks ( Autoclaved Aerated Concrete).

Water Treatment

Lime is extensively used to treat municipal wastewaters and industrial liquid wastes. In wastewater treatment plants (both urban or industrial) Hydrated Lime and Quick Lime are widely used for correcting the pH balance of acidic water, for precipitating heavy metals and phosphates, and for its flocculating action. Lime is widely used for stabilizing industrial residual sludge or dredging sludge and for treating urban biosolids before agricultural re-use or incineration. 

Pharmaceutical Industry

Sigma Pride is widely used in manufacturing most calcium-based organic salts and pharmaceuticals.