Based on their purifying capacity and economy the synthetic order of the four kinds of packing materials is as follows : light weight ceramic lump > porcelain ring > stainless steel ring > plastic ring .

4种填料的净化性能及经济性的 综合排序为：轻质陶块> 瓷环>不锈钢环>塑料环；

Coal gasification reactors are widely used in many industries such as synthetic ammonia nitrogenous fertilizer soda ash explosive city gas mechanical workshop glass porcelain and so on .

造气炉被广泛应用于 合成氨、氮肥、纯碱、炸药、城市煤气、机械加工、玻璃、 陶瓷等行业。