輕燒鎂球如何在濺渣中護爐 How lightly burned magnesium balls protect the furnace in slag splashing

    爐齡是轉爐煉鋼一項綜合性技術指標。提高爐齡不僅可以降低耐火材料消耗，而且有利于均衡組織生產，促進生產的良性循環。所以，大幅度提高轉爐爐齡是鋼鐵企業始終追求的目標。轉爐爐襯工作在高溫、高氧化性條件下，通常以0.2—0.8mm/爐的速度被侵蝕。濺渣護爐是近年來開發一項提高爐齡的新技術。該技術是利用MgO含量達到飽和或過飽和的煉鋼終點渣，通過高壓氮氣的吹濺，冷卻凝固在爐襯表面上，形成一層高熔點的熔渣層，并與爐襯很好地粘結附著。濺渣形成的濺渣層耐腐蝕性較好，可抑制爐襯磚表面的氧化脫碳，又能減輕高溫渣對爐襯磚的侵蝕沖刷，從而保護爐襯磚，降低耐火材料損耗速度，減少噴補料消耗，同時提高爐襯使用壽命，提高轉爐作業率，降低生產成本。 

Furnace age is a comprehensive technical indicator for converter steelmaking. Increasing the furnace age can not only reduce the consumption of refractory materials, but also help to balance the production of the organization and promote a virtuous cycle of production. Therefore, it is the goal that iron and steel enterprises have always pursued to greatly increase the converter age. The converter lining works under high temperature and high oxidizing conditions, and is usually eroded at a speed of 0.2-0.8mm / furnace. Slag splashing furnace protection is a new technology developed in recent years to increase furnace age. This technology uses the steelmaking end-point slag whose MgO content reaches saturation or supersaturation, and is cooled and solidified on the surface of the furnace lining by high-pressure nitrogen blowing to form a high melting point slag layer, which is well adhered to the furnace lining. . The slag-spattering layer formed by slag splashing has good corrosion resistance, which can inhibit the oxidation and decarburization of the surface of the furnace lining bricks, and can reduce the erosion and erosion of the furnace lining bricks by the high-temperature slag, thereby protecting the furnace lining bricks, reducing the refractory material loss rate, and reducing spraying and filling Consumption, at the same time increase the life of the furnace lining, improve the converter operating rate, and reduce production costs.

    輕燒鎂球系選用高活性氧化鎂為主要原料，加入適量的添加劑，經混和、壓球機或成球盤制球、干燥而成。 

    輕燒鎂球主要用于轉爐煉鋼造渣。該產品加入轉爐綜渣中、和爐渣迅速反應，能夠有效地調節綜渣成份，使爐渣中的主要礦物相變為高熔點的MgO、C3S和C2S相，提高爐渣的粘度和熔點，從而顯著地提高了濺渣護爐效果。因此，輕燒鎂球是轉爐濺渣護爐的護渣成分調節劑。 

    隨著冶金工業的快速發展，平爐煉鋼以被淘汰，大步向大型轉爐過渡。而轉爐濺渣護爐工藝是在轉爐出鋼后，采用氧槍吹氮氣，將爐內含有一定量MgO的剩余爐渣均勻吹濺到爐壁上去，在爐壁上均勻地噴濺一層渣，從而達到保護爐襯的作用。 

Light-burned magnesium balls are made of highly active magnesium oxide as the main raw material, added with an appropriate amount of additives, and mixed, ball-pressed or ball-shaped discs and dried.

Light-burned magnesium balls are mainly used for converter steelmaking and slagging. The product is added to the converter slag and reacts quickly with the slag. It can effectively adjust the composition of the slag and change the main mineral phase in the slag into high-melting MgO, C3S and C2S phases. Improved slag splashing furnace protection effect. Therefore, light-burned magnesium balls are slagging component regulators for converter slag splashing furnaces.

With the rapid development of the metallurgical industry, open-hearth steelmaking has been eliminated, and large-scale transitions have been made to large converters. The converter slag splashing furnace protection technology uses an oxygen lance to blow nitrogen after the steel is discharged from the converter. So as to protect the furnace lining.