Synthetic Slag
Fused calcium aluminate (pre-melted aluminum calcium slag) is mainly used in LF furnace, open hearth, converter ladle refining to remove impurities such as sulfur and oxygen in the molten steel and reduce the content of harmful elements and impurities in the steel. Suitable for normal carbon steel, high carbon steel, high and low alloy steel.The fused calcium aluminate produced by JIAXIN has uniform chemical composition, low melting point and fast melting speed, which can shorten the smelting time; fused calcium aluminate does not contain fluorine, does not corrode the furnace lining and ladle; the calcium aluminate has a compact structure, does not absorb water, and is convenient Storage and transportation: Due to thestable phase and fast slag formation, itcan reduce dust pollution to steel plants and stabilize the refining process; it does not contain hydrogen, nitrogen, carbon and other impurities, which is beneficial to improve the quality of steel.
1. the sintered and pre melted refining slag (calcium aluminate) is sintered or synthesized by high-quality materials. It has the functions of rapid slag formation, submerged arc, slag making, absorption of steel liquid inclusion desulfurization, and has strong deoxidation and desulfurization effect, which can reduce the gas in steel and reduce the inclusion in steel.
2. the sintered and pre molten refining slag (calcium aluminate) produced by our factory is sintered or melted by materials. It has the functions of rapid slag formation, submerged arc, slag making, absorption of steel liquid inclusion desulfurization, etc., and has strong deoxidation and desulfurization effect, which can reduce the gas in steel and reduce the inclusion in steel. The product is a kind of mineral which is mainly composed of 12CaO · 7Al2O3, which is sintered or melted from various raw materials. Its content is more than 85. A large number of calcification 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 purify the molten steel. In ladle refining, it can shorten the time of steelmaking, and has the ability to absorb the non-metallic inclusions in steel, and has a significant effect on purifying the molten steel.
2. Physical Data sheet : ( Kindly concern , this is just Best-selling and common grade materials , we acccept Off-grade Orders)
| CaO | AL2O3 | S | SIO2 | Fe2O3 | CaF2 | MgO | P | |
| ≥45 | ≥38 | 0.1 | ≤4 | ≤1.5 | | | | |
| 50±5 | 31±5 | | ≤7 | ≤5 | | 7±4 | | |
| 50±3 | 30-40 | | ≤7 | ≤1.5 | | ≤7 | | |
| ≥45 | ≥40 | | ≤4 | ≤1.5 | 4-6 | ≤4 | | |
| 45-55 | 35-45 | | ≤6 | ≤1.5 | | ≤5 | | |
| 45-50 | 35-40 | | ≤7 | ≤1.5 | | ≤5 | | |
| 45-53 | 39-44 | | ≤5 | | | ≤5 | | |
| 20±2.5 | 30±3 | ≤0.05 | 7±1.5 | ≤0.5 | 40±3 | 3±1 | ≤0.05 | |
| 45-50 | 41-46 | | ≤5 | ≤1.5 | | ≤5 | | |
| ≥48 | ≥38 | | ≤3 | ≤1.5 | | ≤3 | | |
| 50-55 | 36-44 | ≤0.1 | ≤4 | ≤1.5 | (TIO2≤1.5) | ≤0.05 | | |
| 48-58 | 28±3 | ≤0.3 | ≤6 | (TIO2 | | ≤0.3 | | |
| 48-52 | 42-45 | | ≤4.5 | (TIO2 | | | | |
3. Product features:1. Reasonable chemical composition is conducive to slag formation as soon as possible and smelting time is shortened.
2. Because of the fast slag formation, the power consumption of refining time can be reduced.
3. Reduce the consumption of refractory and increase the ladle life.
4. It has good desulfurization and deoxidation effect.
5. Because of its low melting point, it has a good function of adsorbing impurities in the process of argon blowing in ladle and tapping of EAF.
6. The ingredients are stable and uniform, and can be produced and packaged according to the requirements of users.
4. Usage analysis:1. Desulfurization
In the refining process, the ratio of molten slag to molten steel is used to control the sulfur content in steel. Sulfur is one of the common harmful elements in steel, which has many adverse effects on the properties of steel. Therefore, the greater the desulfurization capacity of refining agent, the lower the sulfur content of liquid steel.
2. Desulfurization
There are two kinds of oxygen in molten steel, dissolved oxygen and combined oxygen, which can be removed by slag in the form of inclusions. In the refining process, a certain amount of deoxidizer is added to make the dissolved oxygen in the steel convert into oxide to a large extent, and it can float up through its own buoyancy and appropriate low blowing argon stirring, and finally enter the slag layer for adsorption. In addition, oxygen in molten slag and molten steel obeys the distribution law. When the reducing refining agent contacts with molten steel, the dissolved oxygen in steel can diffuse into the slag to deoxidize the molten steel.
3. Adsorbed impurities
In the refining process, due to the strong stirring effect of low argon blowing, the emulsified slag will contact with the liquid steel in a large area, and the chance of contact between the slag and the impurities (especially the impurities with large particles) in the steel will increase sharply. Because the refining slag is the ionic melt formed by the melting of oxides, and the impurities in the steel are mostly oxide melts, The impurities in steel are easy to be integrated with slag drops, dissolve and combine with each other to form larger slag drops, and then capture other impurities. Because of the greater buoyancy, the large volume droplets will quickly float up and melt into the slag layer on the surface of liquid steel. The emulsified slag droplets can become the nucleation crystal of deoxidation products, so that the deoxidation products can quickly form stable compounds, reduce the chemical potential of deoxidation products in liquid steel, make the reaction develop in the direction of favorable deoxidation, and accelerate the deoxidation reaction. Due to the high content of Al2O3 in the refining agent, the composition of the slag becomes very stable, and the properties of the slag will not change with the entry of deoxidation products (Al2O3). Therefore, the refining agent always maintains a very stable ability of deoxidation, desulfurization and impurity removal.
4. Protective effect on furnace lining
Because there is about 8% - 10% MgO in the refining agent, the MgO of the slag is basically saturated, so the MgO contained in the ladle lining near the slag line can only be dissolved in a small amount in the slag, so as to reduce the erosion of the ladle lining. Secondly, the foaming submerged arc effect of the refining agent is good, which reduces the arc erosion on the ladle lining and improves the ladle life.
5. PackagingPlastic lined composite woven bag (1000kg) packaging, can also be used according to customer requirements in other forms of packaging.
6. According to the composition of the user's molten steel, the proportioning can be adjusted and the index can be changed to meet the demand of refined steel.
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