It also describes the key points of the gas adding process and stresses the process principle of removingdross before adding gas, gas adding without the production of dross.
加氢气法及加气处理的工艺要点，强调了加气先除渣，加气不加渣的工艺原则。
2
Cinder scraping manipulator which is the dedicated device used for removing the dross on the surface of the melting metal liquid.