Urea ammonium nitrate production

A process according to any one of the preceding claims, the process further comprising producing Calcium Ammonium Nitrate (CAN) granules by

• (f) subjecting a part of the aqueous ammonium nitrate solution of step (c) and a calcium salt stream, such as calcium carbonate or calcium nitrate, to a CAN finishing unit so as to form CAN-granules and a CAN off-gas, said CAN off-gas containing ammonia, ammonium nitrate and entrained Ca-containing particles;
• (g) feeding said CAN off-gas to the finishing treatment section
• wherein said finishing treatment section is adapted to treat said CAN off-gas with an acidic scrubbing liquid thereby forming a Ca-containing salt solution before recycling the scrubbing liquid to the UAN section.

A method of modifying a plant, wherein the plant comprises an ammonium nitrate section for reacting ammonia and nitric acid under ammonium nitrate forming conditions, a finishing section adapted to solidify a urea liquid, and a finishing treatment section having a gas inlet in fluid communication with a gas outlet of said finishing section, adapted to subject ammonia-containing off-gas of the finishing section to treatment with an acidic scrubbing liquid,

• wherein the method comprises adding a connection for fluid communication between an outlet for off-gas from said ammonium nitrate section and a gas inlet of said finishing treatment section, such as piping or tubing.