open-hearth furnace process with oxygen blowing is to support the
combustion. Its purpose is to strengthen the smelting process, shorten
the smelting time and improve the steel output of the open-hearth
furnace. The practice has proved that, if the open-hearth furnace
process with oxygen blowing is adopted, the steel output of the open
hearth furnace may be increased by over 100%, and the fuel consumption
may be reduced by 33%〜50%. According to the calculation, the consumption
per ton of steel is 30~40m3.
furnace process with oxygen blowing may accelerate the furnace burden
fusion and impurity oxidation, which means that the electric furnace
process with oxygen blowing can improve the production capacity and
enhance the quality. The electric furnace* s consumption per ton of
steel varies with smelting steel types. For example, when the carbon
structural steel is smelted, the oxygen consumption per ton of steel is
20~25mm3; however, the oxygen consumption per ton of high-alloy steel is
25〜30 m3. The required oxygen concentration is 90%〜94% enriched oxygen.
blast furnace process with enriched oxygen blowing may observably
reduce the coking and improve the output. According to the statistical
information, if the oxygen concentration is enhanced by 1%, the iron
output may be increased by 4%〜6% and the coking may be reduced by 5%〜6%.
Especially, when the coal injection rate of coal-based iron-making
water reaches 300kg, the corresponding oxygen consumption per ton of
iron is 300m3.
In the smelting process of
non-ferrous metals, if the oxygen is added, the sulfur may fully burn,
so as to maintain the smelting temperature and improve the smelting
speed. Taking copper as an example, using enriched oxygen to smelt the
copper may save 50% energy. In other words, under the same fuel
consumption condition, the copper output may be increased by 100%.