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发明公开
CN103911479A 90t顶底复吹转炉中铬矿直接还原合金化的方法 失效 - 权利终止 转让

90t顶底复吹转炉中铬矿直接还原合金化的方法
摘要：
本发明公开了一种90t顶底复吹转炉中铬矿直接还原合金化的方法。该方法在转炉冶炼时实行如下制度：1）废钢装入方法；2）渣料加入及吹氧方法：采用单炉双渣两步法冶炼工艺；3）底吹方法；4）点吹方法；5）其他：其他方法按常规钢种的相关工艺方法进行；最后得到的低合金钢液中金属铬的含量为0.45～1.05%，脱磷率为88～92%。本发明将加入铬矿产生的熔池温降与减少废钢加入相匹配，通过单炉双渣两步法冶炼工艺，既保证了脱磷效果，又在单炉中实现了少渣冶炼的直接还原合金化条件，使铬的收得率较高；因此，处理工艺简单，操作方便，成本低廉。
摘要（英）：

The invention discloses a method for directly reducing and alloying a chromium ore in a 90t top-bottom combined blowing converter. during the smelting of the converter, the method is carried out in the following way: 1) a scrap steel charging method; 2) slag charging and oxygen blowing methods: adopting a single-converter and two-slag two-step smelting technology; 3) bottom blowing method; 4) top blowing method; and 5) other methods: carrying out related technological methods of the conventional steel balls, wherein the content of metal chromium in the finally produced low-alloy molten steel is 0.45-1.05% and the dephosphorization rate is 88-92%. Smelting tank temperature reduction generated during adding chromium ores is matched with reduction of waste steel, and by adopting the single-converter and two-slag two-step smelting technology, the dephosphorization effect can be guaranteed, the direct reduction and alloying conditions for smelting with less slag can be realized in a single converter, and the yield of chromium is high relatively; therefore, the method is simple in treatment technology, convenient to operate, and low in cost.

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