At panzhihua Iron and Steel Company,hydrogen content in molten heavy rail steel is rather low during smelting in the oxygen top-blown converter,and sloightly increases in tapping and pouring.Average H content varies f...At panzhihua Iron and Steel Company,hydrogen content in molten heavy rail steel is rather low during smelting in the oxygen top-blown converter,and sloightly increases in tapping and pouring.Average H content varies from 2.0(dry season)to 2.4 ppm(rainy season)at smelt- ing end;2.8 ppm in ladle;and 2.1 ppm(dry season)to 2.3 ppm(rainy season)in mould, which is on a level with RH vacuum circle.The low hydrogen content in molten steel,which is due to both the very dry climate in Panzhiihua region and the LD smelting process,is the main reason why there is little flake in the heavy rail produced by Panzhihua Iron and Steel Com- pany.展开更多
Two processes of making stainless steel in electric furnace- AOD furnace and converter furnace- AOD furnace by using chromite are suggested.The analysing and computing results show that the energy consumption and cost...Two processes of making stainless steel in electric furnace- AOD furnace and converter furnace- AOD furnace by using chromite are suggested.The analysing and computing results show that the energy consumption and cost of the processes suggested are lower than those of the traditional process by using ferrochrome.The crude stainless steel liquid with chromium content of 15% is obtained in hot mode experiment of chromite reduction.The kinetics of chromite reduction is discussed according to the experiment results.The relations of pre-reduction rate and smelting reduction rate of chromite with the factors that affect the reduction rate are derived.展开更多
文摘At panzhihua Iron and Steel Company,hydrogen content in molten heavy rail steel is rather low during smelting in the oxygen top-blown converter,and sloightly increases in tapping and pouring.Average H content varies from 2.0(dry season)to 2.4 ppm(rainy season)at smelt- ing end;2.8 ppm in ladle;and 2.1 ppm(dry season)to 2.3 ppm(rainy season)in mould, which is on a level with RH vacuum circle.The low hydrogen content in molten steel,which is due to both the very dry climate in Panzhiihua region and the LD smelting process,is the main reason why there is little flake in the heavy rail produced by Panzhihua Iron and Steel Com- pany.
文摘Two processes of making stainless steel in electric furnace- AOD furnace and converter furnace- AOD furnace by using chromite are suggested.The analysing and computing results show that the energy consumption and cost of the processes suggested are lower than those of the traditional process by using ferrochrome.The crude stainless steel liquid with chromium content of 15% is obtained in hot mode experiment of chromite reduction.The kinetics of chromite reduction is discussed according to the experiment results.The relations of pre-reduction rate and smelting reduction rate of chromite with the factors that affect the reduction rate are derived.
