Method for refining high carbon molten steel by using low aluminum steel casting residue
A casting slag and low-aluminum steel technology, which is applied in the direction of improving process efficiency and recycling materials, etc., to achieve good slagging condition, fast slagging speed and low cost
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Embodiment 1
[0026] A method for refining high-carbon molten steel with low-aluminum steel casting slag, the steps of which are as follows:
[0027] 1) Preparation of refining slag:
[0028] a) collecting Al≤0.0040% aluminum and steel casting slag with a basicity of 2.0, 2.5, 2.8, 3.2, 4.5;
[0029] b) Crushing the collected Al≤0.0040% aluminum and steel casting slag, with a particle size of ≤5 mm;
[0030] c) Grinding: adding hydrated lime while grinding, the alkalinity of the mixture after adding hydrated lime is 4.5, and the particle size of the grinding is ≤2 mm;
[0031] d) Add water glass water inorganic binder, its addition is Al≤0.0040% 2% of the total amount of aluminum steel casting residue and slaked lime, and stir evenly;
[0032] e) making balls, the diameter of which can be controlled within the range of 5 to 25 millimeters to any size;
[0033] f) Baking, the baking temperature is 80-85°C, the baking time is 175-180 minutes, and the refining slag is ready for use;
[003...
Embodiment 2
[0037] A method for refining high-carbon molten steel with low-aluminum steel casting slag, the steps of which are as follows:
[0038] 1) Preparation of refining slag:
[0039] a) collecting Al≤0.0040% aluminum and steel casting slag with basicity of 2.0, 2.8, 3.2, 3.6, 4.3;
[0040] b) Crushing the collected Al≤0.0040% aluminum and steel casting slag, with a particle size of ≤5 mm;
[0041] c) Grinding: adding slaked lime while grinding, the alkalinity of the mixture after adding slaked lime is 4.8, and the particle size of the grinding is ≤2mm;
[0042] d) adding sodium chloride / magnesium chloride / calcium chloride inorganic binder, the amount of which is 2.5% of the total amount of Al≤0.0040% aluminum steel casting residue and slaked lime, and stirring evenly;
[0043] e) making balls, the diameter of which can be controlled within the range of 5 to 25 millimeters to any size;
[0044] f) Baking, the baking temperature is 95-100°C, the baking time is 150-165 minutes, and...
Embodiment 3
[0048] A method for refining high-carbon molten steel with low-aluminum steel casting slag, the steps of which are as follows:
[0049] 1) Preparation of refining slag:
[0050] a) collecting Al≤0.0040% aluminum and steel casting slag with basicity of 2.2, 2.5, 3.0, 3.8, 4.3;
[0051] b) Crushing the collected aluminum-free steel casting slag, the particle size of which is ≤5 mm;
[0052] c) Grinding: adding slaked lime while grinding, the alkalinity of the mixture after adding slaked lime is 5.0, and the particle size of the grinding is ≤2mm;
[0053] d) adding coal tar organic binder, the amount of which is 3.0% of the total amount of Al≤0.0040% aluminum steel casting residue and slaked lime, and stirring evenly;
[0054] e) making balls, the diameter of which can be controlled within the range of 5 to 25 millimeters to any size;
[0055] f) Baking, the baking temperature is 105-110°C, the baking time is 100-105 minutes, and the refining slag is ready for use;
[0056] 2...
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