On May 20, the process program of Kuitun 200kt/a ammonium sulfate project got through review. It presented the project of Kuitun Copper Crown ammonium sulfate entered into the detailed design stage. The Kuitun 200kt/a ammonium sulfate project was invested by Kuitun Copper Crown metallurgical limited liability company. The company was founded in December 2010 and the company built the program which can product 300000 tons of pyrite, 400000 tons of sulfuric acid and 170000 tons of iron every year in 2012 July.