open-hearth process是什么意思

用法例句

The process of coal tar steelmaking in special steel open hearth is described in this paper.

介绍了特钢平炉煤焦油炼钢工艺。

The study on catalytic performance of fine ferrite derived from open-heath dust;

平炉尘合成超细铁氧体催化性能研究

Studies on magnetic properties of fine MnFe_2O_4 by open-heath dust;

平炉尘合成MnFe_2O_4的磁性分析

Studies of mechanism of preparation of fine ferrite by using open-heath dust;

平炉尘合成超细铁氧体机理研究

With the action of some bivalent cation, high temperature shift catalyst has been prepared by mixture precipitation method using open-hearth dust as a raw material.

利用钢铁厂平炉尘制备中温变换催化剂,制备成本低,工艺简单,活性达到部颁标准,具有明显的经济效益。

Fe3O4 produced from open-hearth dust and Fe2+ employing surfectant makes particles much fine.

同时用平炉尘制备了中温变换催化剂，成本低，工艺简单，活性达到化工部部颁标准。