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MEFOS已研究成功往钢液中喷吹不同粉剂的技术,这项技术使用儿个分配器,通过一根共用的软管和一个喷枪喷吹不同粉剂,喷完一种粉剂转为喷另一种时,喷枪始终浸没在钢液中。利用上述多组元喷吹技术已进行过多次试验,往钢中连续喷吹不同比例的CaO+CaF:混合物与CaSi粉剂。为了对比,也曾使用单一的Cao十CaF_2或CaSi粉剂作喷吹试验。结果表明,单独喷吹CaO十CaF_2或CaSi粉剂以及用二种粉剂进行多组元喷吹,对钢的脱硫效果相同。在钢中喷CaO+CaF_2粉剂时,要想得到相同结果,其先决条件是喷吹前钢中氧的活度要低。因此,喷吹CaO+CoF_2粉剂是最便宜的脱硫方法。已经证实喷吹CaO十CaF_2粉剂能保证钢的最佳脱氧率及洁净度,减少氧化物夹杂。在实验中,喷吹CaO十CaF_2时,钢中总氧量和不同尺寸的夹杂物数量均有所减少,而喷单一的CaSi粉剂的结果恰恰相反。 先喷CaO+CaF_2随后喷CaSi的多组元喷吹或仅喷CaSi粉,均可使钢中的铝酸盐夹杂改变形态成为球状钙铝酸盐夹杂物。为了使夹杂物改变形态,多组元喷粉较喷CaSi粉剂降低成本50帕左右。
MEFOS has studied the successful injection of different powders into molten steel, using several dispensers, blowing different powders through a common hose and a spray gun, spraying one powder to spray another When the gun is always immersed in the molten steel. Several tests have been conducted using the multi-element blowing technique described above, with different ratios of CaO + CaF: mixture and CaSi powder continuously injected into the steel. For comparison, a single Cao 10 CaF 2 or CaSi powder was also used as a blowing test. The results show that single injection CaO CaF_2 or CaSi powder and two powder injection of multiple components, the desulfurization of steel the same effect. In the steel spray CaO + CaF2 powder, to get the same result, the prerequisite is that the activity of oxygen in the steel before injection is low. Therefore, blowing CaO + CoF2 powder is the cheapest way to desulfurize. It has been confirmed that spraying CaO + CaF2 powder can ensure the best deoxidation rate and cleanliness of steel and reduce oxide inclusions. In experiments, the amount of total oxygen and inclusions with different sizes in steel decreased when CaO + CaF 2 was sprayed on, whereas the result of spraying single CaSi powder was just the opposite. The first spray CaO + CaF_2 followed by spray CaSi multi-component injection or spray only CaSi powder, can make the steel aluminate inclusions change into globular calcium aluminate inclusions. In order to change the morphology of inclusions, multi-component spray powder spraying CaSi powder to reduce costs about 50 Pa.