High-calcium Quicklime

High-calcium quicklime is lime made from rich deposits of high-calcium limestone containing less than 5% magnesium carbonate. Calcium oxide (CaO), commonly known as lime or quicklime, is a widely used chemical compound. It is a white, alkaline, and crystalline solid.

High Calcium

Quicklime is produced by heating limestone as shown in the following equation:

Quicklime is created by heating limestone as shown in the following equation:

CaCO3 + HEAT = CaO + CO2

High-calcium quicklime provides superior chemical performance. It will deliver exceptional performance for acid-neutralization, SO2-absorption, sludge-stabilization or other industrial-alkali applications.

Graymont offers a number of high-calcium quicklime products tailored to specific industries. These products include:

AOD lime

AOD lime is specifically processed to meet the demands of the specialty-steel markets. Our AOD-grade quicklime is characterized by low carbon and sulfur contents while retaining exceptionally high reactivity.

Pulverized lime

Pulverized lime is a specially milled quicklime product for various metallurgical, industrial, chemical and agricultural applications. Final product size is milled to less than 100-mesh. Pulverized lime is also available with an additive for enhanced handling and flowability.

Chemical lime

At Graymont, the production of chemical lime begins with the selective mining of chemically pure CaCO3. Throughout the manufacturing process, we carefully monitor process control to produce a high-calcium quicklime that is highly reactive and has an exceptionally high particle surface area. The result is a chemical lime that will provide exceptional performance for your acid neutralization, flue-gas desulfurization, sludge stabilization or other industrial alkali applications. The unique combination of high availability CaO, high reactivity and high particle surface area means that less of Graymont’s lime will be required to “do the job”, compared with other commercially produced lime products.

Granulated lime

Granulated lime is a specially sized quicklime that meets exacting particle size specifications. Granulated lime provides Graymont customers with a fine yet dust-free product.

Ground lime

Ground lime is sized to meet particular specifications where a high-quality lime product is required. When customers demand a high-performance ground lime, Graymont can deliver.

BOF lime

BOF lime is specifically processed to meet the demands of integrated steel manufacturing. Our BOF-grade lime yields low loss-on-ignition, low sulfur and low fines content for optimum process results.

PCC lime

PCC lime provides superior chemical base performance compared to standard lime products. Graymont carefully monitors process control to produce high-calcium CaO that is highly reactive and has exceptionally high brightness.

Not all of these products are available at all plants. Please contact a Graymont representative to make arrangements to satisfy your particular requirements.

Did you know?

Limestone is composed of the mineral calcite (calcium carbonate) and/or the mineral dolomite (calcium and magnesium carbonate) along with small amounts of other minerals.