Limestone
Produced at the unit of São João del Rei (MG), limestone is a sedimentary rock composed predominantly of calcium carbonate (CaCO₃), usually in the form of calcite or aragonite.
For high-end industrial applications, such as glassmaking, it is essential that the limestone exhibits high chemical purity, with low levels of impurities such as iron oxide and silica.
At Jundu, limestone is extracted and processed with a high degree of purity and particle size control, being especially suited for applications in the glass industry.
Applications in Flat Glass and Packaging
The limestone extracted and processed by Jundu is essential in the production of flat glass and glass packaging. It acts as a source of calcium and a stabilizer, contributing to the durability, chemical resistance, and viscosity control of molten glass. Its superior quality allows it to meet the technical requirements of the glass industry, ensuring process efficiency and high product performance.
Chemical composition
High levels of CaCO₃ (above 95%) are desirable.
Controlled granulometry
Particle size directly influences the efficiency of fusion and the homogeneity of the glass.
Low impurity content
Impurities such as clays, iron oxides, and organic matter can compromise the transparency and chemical stability of glass.
Technical Properties
Chemical composition
Predominance of CaCO₃
High purity
Low iron content and other contaminants
Controlled granulometry
Suitable for the demands of the glass industry.