A new process for soda ash production based on converted gas, developed by China is very competitive in the world. However, it is difficult to manufacture the large size carbonization tower because of its special structure. Therefor the process has only been used in the small soda ash plants for years. Newly developed large size carbonization tower has been put into operation recently. Disadvantage of traditional Solvay technology has been overcome by using this new process. The developed technology will surely promote further progress of soda ahs manufacturing based on converted gas, and hence enhance the competitive capability of China´s soda ash industry on the international market.