It analyses causes and countermeasures for rising of SO 3 Ratio in high concentration oxygen enriched smelting gas of flash furnace.

XRD and SEM analyzing the samples of magnesial bricks corroded near the zones by air and oxygen-enriched blow have shown that the main phenomena are contaminating Cu along the crevices and capillary of the refractory near tuyere zone, and are Cu_2S accompanied by less Cu and Fe_3O_4 near tuyere's up-side zone by air blow.

By XRD and SEM analying the samples of lining conosion near tuyere and its up-side zone of matte converter by air and oxygen-enriched blow,The corrosion mechanism of Cu,Cu 2S and Fe 3O 4 influencing on magnesia refractory,and distribution of Cu,Cu 2S and Fe 3O 4 along refractory fracture and capillary are studied in matte converting process.

Preparation of Amorphous Ni-Mo-P alloy Produced by Chemical Depasition;