Recently, an AKR compound desulfurization process independently developed by Ansteel and combining desulphurization with KR desulphurization has achieved remarkable results through preliminary industrial application. The desulfurization powder-passivated metallic magnesium powder and passivated lime powder reduced significantly 30%, in order to further reduce the cost of smelting to provide strong technical support.
Desulphurization of hot metal pretreatment is the modern steel industry to optimize the process, improve the quality of smelting an important means. At present, there are two kinds of mainstream desulfurization methods: injection method and KR desulfurization method. Injection molding equipment complex, compared to the KR process, one-time investment, at the same time, as the injection of magnesium powder and calcium powder process, injection process desulfurization flux costs far higher than the KR process. KR stirring desulfurization method has obvious advantages, because of good kinetic conditions, low desulfurization agent consumption, desulfurization effect and cost are ideal, but the new investment higher. Due to historical reasons, the steelmaking plant in addition to the third branch D, E converter for the KR desulfurization, the remaining converters are blowing desulfurization.
In the ultimate cost challenge, to reduce costs and enhance efficiency in the process, the plant will look to reduce the cost of hot metal desulphurization powder injection. The more advanced KR Desulfurization System launched, of course, save time and effort, but also to achieve the purpose of reducing the cost of blowing powder, but the new equipment investment costs, time and cost are very high. In this context, the steelmaking plant decided to combine the existing process conditions, the creative transformation of the current injection process, the KR desulfurization process technology into the existing dusting desulfurization process, to achieve low-cost transformation, cost-effective aims.
Take a specific R & D tasks Anshan Iron and Steel Company Steel Plant a branch immediate action, on the one hand based on the existing injection process equipment, fully learn KR desulfurization process principle, the plant spray desulfurization equipment to transform and develop a new type of rotation No paddle T-type spray gun to improve the equipment dynamic conditions, while expanding the mixing range and the reaction interface to enhance the mixing desulfurization effect; the other hand, to step up exploration of process equipment parameters and to determine, after more than two months of orthogonal test, the final confirmation The best process parameters of the interval.
After more than two months of 270 cans of hot metal data show that the combination of KR desulfurization process principle AKR composite desulfurization process, not only higher desulfurization efficiency, desulfurization effect to meet the technical requirements, the use of desulfurization powder, but also more savings. Tons of iron-passivated magnesium powder and passivated lime powder decreased by 25.3% and 28.9% respectively, reaching the expected target. This compound desulfurization process has also been named "AKR desulfurization process", meaning that the independent research and development of Ansteel KR mixing desulfurization process.
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