Fluorine-free sodium-free ladle covering agent
A ladle covering agent and covering agent technology, which is applied in the field of steel smelting and ladle metallurgy, can solve the problems of poor application effect of covering agent, low desulfurization ability, slow melting speed, etc. strong effect
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Embodiment 1
[0031] Using spodumene, lime, magnesia, and carbon black as raw materials, spodumene, lime, and magnesia are dried at 200°C, according to 40% of spodumene, 40% of lime, 10% of magnesia, and 10% of carbon black The batching, batching and preparation process are as follows: weigh spodumene, lime and magnesia according to weight parts, mix well and pre-melt at 1300-1400°C, cool with natural wind after melting, break after cooling, and then Made into fine powder, mixed with carbon black according to parts by weight, mixed evenly and ground to 200 mesh (particle size less than 0.074mm), after pulping, dried in a low-pressure spray granulation tower to form a hollow particle covering agent, moisture-proof packaging for use ; According to the melting performance test, the melting point of the covering agent is 1250°C, the melting time at 1350°C is 55s, and the surface tension is 0.43N / m, which meets the melting performance requirements of the ladle covering agent.
[0032] The coveri...
Embodiment 2
[0038] Spodumene, lime, magnesia, and carbon black are used as raw materials, and spodumene, lime, and magnesia are dried at 200°C, according to 80% of spodumene, 10% of lime, 5% of magnesia, and 5% of carbon black The batching, batching and preparation process are as follows: weigh the spodumene, lime, and magnesia according to the weight parts, mix well and pre-melt at 1350 ° C, cool with natural wind after melting, break after cooling, and then make Fine powder, mixed with carbon black in parts by weight, mixed evenly and finely ground to 200 mesh (particle size less than 0.074mm), after pulping, dried and shaped in a low-pressure spray granulation tower to form a hollow particle covering agent, moisture-proof packaging for later use; The melting performance test shows that the melting point of the covering agent is 1180°C, the melting time at 1350°C is 40s, and the surface tension is 0.32N / m, which meets the melting performance requirements of the ladle covering agent.
[...
Embodiment 3
[0045] Spodumene, lime, magnesia, and carbon black are used as raw materials, and spodumene, lime, and magnesia are dried at 200°C, according to 60% of spodumene, 25% of lime, 10% of magnesia, and 5% of carbon black The batching, batching and preparation process are as follows: weigh the spodumene, lime, and magnesia according to the weight parts, mix well and pre-melt at 1350 ° C, cool with natural wind after melting, break after cooling, and then make Fine powder, mixed with carbon black in parts by weight, mixed evenly and finely ground to 200 mesh (particle size less than 0.074mm), after pulping, dried and shaped in a low-pressure spray granulation tower to form a hollow particle covering agent, moisture-proof packaging for later use; Melting performance test shows that the melting point of the covering agent is 1215°C, the melting time at 1350°C is 47s, and the surface tension is 0.39N / m, which meets the melting performance requirements of the ladle covering agent;
[004...
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