Abstract: In order to promote the comprehensive utilization of large amount of waste and new-type waste and develop efficient recovery and resource utilization technology of hot slag waste heat， titanium bearing blast furnace slag and mine iron tailings were used as raw materials to prepare microcrystalline cast stone by melting at high temperature during slag discharge. The influence of different raw material ratio on the properties of microcrystalline cast stone was systematically studied. The results showed that when the ratio of titanium bearing blast furnace slag and iron tailings is 41.7% and 58.3%， the main crystalline phases are diopside and pyroxene. The titanium bearing blast furnace slag and iron tailings are prepared into microcrystalline cast stone products by using the waste heat of blast furnace slag discharging， which provides a new idea for the comprehensive utilization of mine iron tailings and blast furnace titanium slag.

Key words: titanium bearing blast furnace slag, high temperature melting, microcrystalline cast stone, comprehensive utilization