Abstract: As a byproduct produced in smelting of titanium slag,semi-steel could be the raw of cooling agent used in extraction of vanadium,spheroidal graphite cast iron,casting pig and low-carbon pig iron.According to the quality of semi-steel and the market demand for iron-raw,the technologies for carbonizing,desulfurizing and alloying of semi-steel were studied.The above-mentioned products maded from semi-steel are of good economical benefits.