This project aims to develop a multiscale computer model to fully describe the three-dimensional distribution characteristics of flow, heat and mass transfer within blast furnaces and their impacts on process performance, quantify the effects of key variables, formulate strategies for optimum process control under different conditions. This will be achieved by the use of the state-of-the-art continuum and discrete modelling and simulation techniques, supported by physical experiments and plant tests in Baosteel. The research outcomes, such as models and knowledge, should be useful for achieving reliable and optimal operation of blast furnace in Baosteel.