The experiences in design and construction of a 10 kt/a potassium sulphate plant are described with the emphases on the improvement of insulation,strength and anti-leak of reaction furnace, as well as product propeller based on the experiences of other plants of the same kinds.

Analysis and contrast were made for the multi-kind o f potassium nitrate production units in China and abroad,process flow was pres ented for potassium nitrate by using the vacuum crystallization and metathesis m ethod,design features were described for the potassium nitrate unit by using t he vacuum crystallization and metathesis method.

Increasing mist eliminator capacity in existing sulphuric acid plant installations;

Revamping of pyrite concentrate drying system of Jiangtong-Wengfu's 400 kt/a sulphuric acid plant;

Design of fluidized bed roaster of a 100 kt/a sulphuric acid plant;

Discussion on some problems existing in the fan of sulfuric acid plant with 800 kt/a capacity and its countermeasures;

Retrofits of the Air Purifiers in 6×10~4t/a Sulfuric Acid Plants;

Finally,the congestion problems that hindered the normal sulfuric acid plant production were resolve