At the operation by injecting a large quantity of pulverized coal, as the melting capacity near the wall is large, the ore/coke in the wall region should preferably be increased and the ore/coke in the center region should preferably be d~creased by the charging of ore farther from the furnace center.

Reduction of FeO in Molten Slags with Solid Carbon Masayasu SUGATA, Takashi SUGIYAMA, and Shin-ichi KONDO Synopsis; The reduction rate of FeO in molten slags by rotating carbon rod or coke rod is determined. The testing temperature is ranged from 1 350•Ž to 1 450•Ž and FeO concentration is ranged from 5 percent to 90 percent.

The reduction rate of iron oxide contained in molten slags by rotating carbon rod or coke rod was measured. The range Qf temperature was from 1 350° to 1 450°C and of iron oxide concentration is from 5 to 90 %. At the higher revolution s/Jeed of a rod, it has no ejJect on the reduction rate. Thus, in this range, the rate-determining step can be best inter/Jreted to be at the chemical reaction alld the reductioll rate-is pro/Jortional to the first order of the estimated activity of iron oxide contained in slags. Th e obtained rate equation is;

No abstract

The influences of the inner wall profile and ore/coke distribution on the descending and melting behaviors of burden were analyzed by using a three-dimensional semicircular warm modei of the blast furnace under conditions set as similar as possible to the physical phenomena in the furnace. It For decreasing the thickness of the sluggishly descending zone near the wa[1, the orelcoke near the wallshould preferably be increased as far as the heat-flow ratio is permitted.Such a burden distribution iseftective for pulverized coal injection operation in which the melting capacity near the wall is large.