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Product Description:
Metallurgical calcium aluminate, also known as pre-melted refined slag, is a material used in the steelmaking process. Its main component is calcium aluminate, which can effectively remove impurities such as sulfur and oxygen in molten steel, reduce the content of harmful elements in steel, and improve the metallurgical quality of steel.
The main functions of metallurgical calcium aluminate:
Desulfurization:
By reacting with sulfides in molten steel, it generates sulfides that are easy to remove, thereby reducing the sulfur content in steel.
Deoxidation:
Reacting with oxygen in molten steel to generate low-melting-point oxides, which are easy to float and remove, thereby improving the purity of molten steel.
Improving the cleanliness of molten steel:
By removing inclusions and improving the fluidity of molten steel, the intrinsic quality of steel is improved.
Shortening smelting time:
Compared with traditional refined slag, it has a low melting point and a fast melting speed, which can shorten the smelting time and improve production efficiency.
Reducing production costs:
Improve the cleanliness of molten steel, reduce scrap steel and alloy consumption, thereby reducing production costs.
Classification and application of metallurgical calcium aluminate:
Sintered calcium aluminate:
It is made of high-quality bauxite and limestone and calcined in a rotary kiln. It has the characteristics of uniform composition, low melting point and fast melting speed.
Fused calcium aluminate:
It is produced by electric melting method, with higher purity and better performance. It is mainly used for desulfurization and deoxidation during LF furnace, open hearth furnace and converter refining.
Amorphous calcium aluminate:
It is mainly used as an accelerator for shotcrete and repair mortar in tunnels, underground engineering and other fields.
Advantages of metallurgical calcium aluminate:
Uniform composition:
The composition of sintered and fused calcium aluminate is relatively uniform, which avoids component segregation and makes the smelting process more stable.
Environmental protection:
It does not contain fluorine, does not corrode the furnace lining, does not absorb water, is easy to store and transport, and is beneficial to environmental protection.
Improve the quality of steel:
Reduce the content of harmful elements such as sulfur and oxygen in steel, and improve the strength, toughness and weldability of steel.
Reduce production costs:
Reduce overall production costs by improving production efficiency and reducing material consumption.
In summary, metallurgical calcium aluminate plays an important role in the steelmaking process, and it contributes to the development of the steel industry by improving molten steel quality, increasing production efficiency and reducing costs.
Sifat:
Bergantung pada aplikasi yang dimaksudkan, ia dihasilkan dalam pelbagai saiz. Sebagai flux untuk tundish cor, kami menawarkan butiran 0.5 - 5.0 mm. Dalam bidang metalurgi sekunder, butiran 5 - 15 mm digunakan.
Ia adalah butiran mikropori. Jika leburan atau habuk terak digoncang, contohnya melalui pencucian, habuk terak cecair atau leburan akan menembusi ke dalam liang dan larut dengan cepat.
Dengan menggabungkan granulasi dan sintering berikutnya, kalsium aluminat dengan komposisi yang sangat berbeza boleh dihasilkan—malah mengikut keperluan khusus pelanggan.
10 % < CaO < 53 %, 25 % < Al2O3 < 60 %, 1 % < MgO < 20 %.
Aplikasi:
Bidang aplikasi utama ialah metalurgi sekunder. Secara khusus, kalsium aluminat digunakan untuk penyahsulfuran dalam tungku tangki besi. Hasilnya, habuk terak yang sangat reaktif terbentuk dengan sangat cepat. Selepas itu, habuk terak tepu dengan kapur, contohnya dengan menambah kapur habuk terak, yang membawa kepada penyahsulfuran optimum.
Kawasan aplikasi lain untuk kalsium aluminat pra-reaktif ialah pengeluaran kualiti keluli sensitif hidrogen, seperti gred plat tebal. Di loji cor berterusan, ia digunakan sebagai pembentuk habuk terak ("sandwich") dalam tundish. Sebagai habuk terak cecair, ia melindungi leburan daripada bersentuhan dengan atmosfera, mengurangkan tindak balas yang mungkin berlaku antara leburan dan bahan penutup berasid serta menghalang pertumbuhan inklusi oksida.
Kalsium Aluminat Leburan dibuat daripada kapur berkualiti tinggi dan bauksit sebagai bahan mentah utama, yang dilebur dalam tungku elektrik mengikut nisbah tertentu, disejukkan, dihancurkan dan diayak menjadi produk dengan saiz zarah yang berbeza.
Tanpa F, tiada kakisan pada dinding dalaman tangki besi.
Penyahsulfuran pantas, penyerapan kekotoran.
Tanpa kelembapan, pengangkutan dan penyimpanan lancar.
Pencemaran habuk paling minimum.
Produk hijau tanpa sebarang F, C, N.
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