Calcination is a chemical process that involves heating a substance to high temperatures in the supply of air or oxygen. This thermal treatment causes the decomposition or transformation of the material, often leading to the removal of volatile components, water, or other impurities. Calcination is commonly used in various industries, such as metallurgy, ceramics, cement production, and the chemical industry.
Introduction to Calcination
During calcination, volatile substances, such as water, carbon dioxide, or certain gases, are released, leaving behind a salt, the non-volatile components of the material.
Cement Testing for Compliance
The compliance of cement with standards such as EN 197 / ASTM C 150 is a quality requirement. Quality assurance of the raw materials used in calcination and also during the clinker production is necessary. Carbolite Gero offers different furnaces that help to guarantee quality requirements are met during the production cycle.
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The Calcination Process
Some substances undergo chemical changes during calcination, decomposing into simpler or more stable compounds. For example, certain metal carbonates decompose into metal oxides and carbon dioxide upon calcination. Calcination can change the physical and chemical properties of the material, leading to the formation of new crystal structures or phases.
One of the most well-known examples of calcination is the conversion of limestone (calcium carbonate) into quicklime (calcium oxide) by heating it at high temperatures:
CaCO3 (limestone) → CaO (quicklime) + CO2 (carbon dioxide) > 900°C
Calcination is an essential step in many industrial processes, contributing to the production of various materials, chemicals, and products at temperatures up to 1500°C.
Calcination furnaces
- Temp. Máx.: 1100°C
- Volumes da câmara: 3 a 7 litros
- Em conformidade com a ISO 1171:2010, ASTM D3174-04:2010, ASTM D4422
- Temp. Máx.: 1100 - 1300 °C
- Volumes da câmara: 5 a 65 litros
- Temp. Máx.: 1200 - 1300 °C
- Volumes: 131 a 400 litros
- Temp. Máx.: 1400 - 1600 °C
- Volumes da câmara: 3 a 35 litros
- Temp. Máx.: 1100 °C
- Oscilação de 1 a 8 vezes por minuto
- Rotação de 314° em cada direção
- Temp. Máx.: 1150 °C
- Rotação do tubo 1,5 a 10 rpm
- Controle de temperatura de uma ou 3 zonas
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