Method for reducing chromium oxide in stainless steel slag

• Main Authors: MA JUNPENG, HOU HAIBIN, XING JIBIN, FAN JUN, ZHAO XINMIAO, ZHU YI
• Format: Patent
• Language: Chinese; English
• Published: 13.09.2022
• Subjects: ALLOYS; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; METALLURGY OF IRON; PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OFWROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention relates to the field of steelmaking. The invention discloses a method for reducing chromium oxide in stainless steel slag. The method comprises the following steps: step 1, smelting stainless steel in an AOD (Argon Oxygen Decarburization) furnace; 2, pre-melting liquid is added, when the Si content of the pre-melting liquid ranges from 0.6% to 4.0% through stainless steel smelting, and before desilicication slag is poured out, the content of chromic oxide in the slag is reduced through composite stirring reduction of a top gun and a bottom gun; 3, normal desilicication operation is carried out after blowing is started; and 4, stirring to reduce chromium oxide in the slag after desilicication is finished. By using the method, the stirring strength in the stirring process is increased, the reaction effect between the steel slag is good, and precious alloy chromium in the slag is fully recycled. 本发明涉及炼钢领域。一种降低不锈钢渣中氧化铬的方法，包括以下步骤：步骤一：AOD炉冶炼不锈钢；步骤二：兑入预熔液，不锈钢冶炼使预熔液Si含量介于0.6-4.0%时，在倒出脱硅渣前，使用顶枪和底枪复合搅拌还原降