Usually lime degree of activity than the average 300ml / 4N-HCl superfine lime powder production, can significantly reduce the initial converter steelmaking slag of time, reduce the consumption of lime lime ultrafine powder suppliers, and pre-removal P extremely beneficial to be called active lime. It should be used in the production of active lime limestone material less impurities. Application of ultrafine lime lime factory, smelting slag accelerated speed, shorten the refining time, reduce the consumption of lime reduces the impurities into, greatly improving the quality of molten steel, to bring a significant overall efficiency in the steel industry have formed a consensus. Active lime not only affects the steel smelting process, but also directly affect the final quality of the molten steel.