Production practice and retrofitting of a sulphuric acid plant based on gold smelter off-gas
ZHANG Yuhua, ZU Xiaofeng (Henan Zhongyuan Gold Smelter, Henan Gold Co., Ltd. , Sanmenxia, Henan, 472000, China)
The production practice and retrofitting of a sulphuric acid plant based on gold smelter off-gas with an original design capacity of 40 kt/a is described. The high contents of moisture, dust and sulphur trioxide because of slurry feeding had been a challenge to normal operation. By equipment retrofitting and process upgrading toⅢ Ⅰ-ⅤⅥⅡ "3 + 2" configuration, the plant operated smoothly with a convertion of over 99. 6% and production capacity of 80 kt/a and all indexes reached the design targets.