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2) According to the current hot metal, slag production, calculated using what aperture to ensure that each furnace iron time 36 minutes. (

2) in accordance with the current production of hot metal, slag, calculate what aperture to ensure that each furnace iron more than 36 minutes. （

2) According to the present molten iron, the slag output, the computation uses any type the aperture to guarantee above each stove tapping time 36 minutes.（

2) * In accordance with current melted, slag, calculated using the output what aperture to ensure that each time an iron furnace more than 36 minutes. (

2) in accordance with the current production of hot metal, slag, calculate what aperture to ensure that each furnace iron more than 36 minutes. （