First of all, the top blowing time of converter is not more than one hour. It takes about seven hours for a 300 ton open hearth furnace to make one furnace of steel. Secondly, there are many varieties: oxygen top blown converter can not only make ordinary steel, but also some ordinary low alloy steel. Almost all kinds of steel can be made in open hearth furnace. Due to pure oxygen blowing, the content of harmful gases such as nitrogen and hydrogen in the steel is relatively high, which improves the quality of steel
