Calcium ammonium nitrate or CAN, also known as nitro-limestone or nitrochalk, is a widely used inorganic fertilizer, accounting for 4% of all nitrogen fertilizer used worldwide.
The term "calcium ammonium nitrate" is applied to multiple different, but closely related formulations. One variety of calcium ammonium nitrate is made by adding powdered limestone to ammonium nitrate; another, fully water-soluble version, is a mixture of calcium nitrate and ammonium nitrate, which crystallizes as a hydrated double salt:5Ca(NO3)2•NH4NO3•10H2O. Unlike ammonium nitrate,these calcium containing formulations are not classified as oxidizers by the United States Department of Transportation.
Consumption of CAN was 3.54 million tonnes in 1973/74, 4.45 million tonnes in 1983/84, 3.58 million tonnes in 1993/94.Production of calcium ammonium nitrate consumed 3% of world ammonia production in 2003.
During the production of fertilizer a large volume of exhaust is generated and needs to be treated. Generally first dust & particle removal apply followed by physical and chemical absorption process.
These by-products often contain components such as ammonia, phosphate or urea. To remove these components, BJN designs gas scrubbing systems consisting of a combination of dry and wet gas scrubbing stages.