There are three kinds of refining slags produced by KERUI REFRACTORY, they are pre-melting refining slag, sintering refining slag and composite refining slag.
【Description】
Calcium Aluminate Premelted Refining Slag and Compound Refining Synthetic Slag
The main components of calcium aluminate refining slag are 3CaO·Al₂O₃, Al2O3, SiO2, CaFe2, MgO, etc. These metal ions are combined into CaO-CaF2 base, CaO-Al2O3 base, CaO-Al2O3-SiO2 base, and then the composite material, refining slag is formed. Refining slag is a necessary additive for deoxidation and desulfurization in the refining process of iron and steel enterprises.
There are three kinds of calcium aluminate refining slags produced by KERUI REFRACTORY, they are pre-melting calcium aluminate refining slag, sintering calcium aluminate refining slag and composite calcium aluminate refining slag. They have the functions of rapid slag formation, arc submerging, slag making, absorption of molten steel inclusion and desulfurization. They are of strong deoxidation and desulfurization effect which can reduce gas and impurities in steel. These products are selected from various raw materials by sintering or melting to produce minerals dominated by 12CaO · 7Al2O3, with a content of more than 85%. A large number of calcified components can react with oxygen and sulfur in molten steel to produce products with low melting point and easy to float up, so as to achieve the purpose of purifying molten steel. In ladle refining, it can effectively shorten the steelmaking time, and has strong ability to absorb non-metallic inclusions in steel, and play a significant role in purifying liquid steel.
【Characteristics of Refining Slag】
【Physical and chemical indicators】
Type | SiO2 (%) | Al2O3 (%) | CaO (%) | MgO (%) | CaF2 (%) | Grain Size (mm) | Water Content (%) |
KRL-1 | <4 | 38-45 | 45-50 | 2-4 | 4-6 | 1-30 | <0.5 |
KRL-2 | <6 | 30-38 | 46-54 | 4-10 | - | 1-30 | <0.5 |
【Using Method】
It shall be added into the ladle before tapping, and the amount can be determined according to the current production process conditions. It is recommended to select 3-8g for one ton of steel (it can also be added twice, firstly adding half at the bottom of the ladle, and secondly adding with the steel flow). After argon blowing and stirring at the bottom of the ladle, the gas and impurities in the steel will float fully, the temperature and chemical composition of the molten steel will be uniform, the purity of molten steel will be improved, and the quality of steel will be significantly improved.
【Characteristics of Premelted Refining Slag】
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