Pengantar proses peleburan tungku listrik paduan kalsium silikon

May 17, 2024 Tinggalkan pesan

Paduan kalsium silikon adalah deoxidizer dan desulfurizer ideal yang saat ini digunakan dalam proses produksi baja berkualitas tinggi, baja khusus, dan paduan khusus. Ini juga digunakan sebagai inokulan untuk besi cor dan aditif dalam produksi besi ulet. Baik kalsium dan silikon memiliki afinitas yang kuat dengan oksigen. Kalsium, khususnya, mempunyai afinitas yang kuat tidak hanya dengan oksigen, tetapi juga dengan sulfur dan nitrogen. Paduan kalsium silikon tidak hanya memiliki kemampuan deoksidasi yang kuat, dan produk deoksidasi mudah mengapung dan dibuang, tetapi juga dapat meningkatkan sifat baja dan meningkatkan ketangguhan, ketangguhan benturan, dan fluiditas baja.

 

Calcium silicon alloy is an ideal deoxidizer and desulfurizer currently used in the production process of high-quality steel, special steel and special alloys. It is also used as an inoculant for cast iron and an additive in the production of ductile iron. Both calcium and silicon have strong affinity with oxygen. Calcium, in particular, has a strong affinity not only with oxygen, but also with sulfur and nitrogen. Calcium silicon alloy not only has strong deoxidizing ability, and the deoxidation products are easy to float and be discharged, but also can improve the properties of steel and improve the toughness, impact toughness and fluidity of steel.   The role of calcium silicate blocks in steel smelting is mainly reflected in the following aspects:  1.Desulfurization: The silicon and calcium in the calcium silicate block have strong reducing properties and can react with the oxides in the molten steel to generate volatile gas hydrogen sulfide (H2S), thereby reducing and volatilizing the sulfur in the molten steel. Go out to achieve the purpose of desulfurization and improve the quality of steel.  2.Deoxidation: The calcium in the calcium silicate block reacts with the oxides in the molten steel to form calcium oxide, and participates in the formation of the oxide envelope of the steel, thereby reducing the oxygen content in the molten steel, thereby improving the purity and purity of the steel. strength.  3. Alloy adjustment effect: Silicon and calcium in calcium silicate blocks are both reducing agents and alloy elements. Adding calcium silicate blocks to molten steel can adjust the non-metal content in the molten steel and cause changes in the alloying elements in the steel. For example, calcium silicate blocks with higher silicon content can be used to increase the silicon content and increase the content of the alloying element silicon, thereby improving the properties of steel and adapting to different application requirements. Calcium silicon electric furnace production process: The production of calcium silicon alloy is relatively complex. The main raw materials in the production process are quartz (Si02,), limestone (CaCO3,) and reducing agent mixture (mainly coke and bituminous coal).  Calcium silicon alloy is produced by reducing silicon dioxide and calcium oxide using a carbonaceous reducing agent in a reduction electric furnace. The conventional production methods of calcium silicon alloy can be divided into three types, namely: mixed feeding method, layered feeding method and two-step method. Mixed feeding method, also known as one-step method. Use a carbonaceous reducing agent to simultaneously reduce silica and calcium oxide, that is, mix all the raw materials evenly and add them into the furnace in small batches. The mixing and feeding method is simple to operate and easy to control.

 

Peran blok kalsium silikat dalam peleburan baja terutama tercermin dalam aspek-aspek berikut:

 

1. Desulfurisasi: Silikon dan kalsium dalam blok kalsium silikat memiliki sifat pereduksi yang kuat dan dapat bereaksi dengan oksida dalam baja cair untuk menghasilkan gas hidrogen sulfida (H2S) yang mudah menguap, sehingga mengurangi dan menguapkan belerang dalam baja cair. Keluar untuk mencapai tujuan desulfurisasi dan meningkatkan kualitas baja.

 

2. Deoksidasi: Kalsium dalam blok kalsium silikat bereaksi dengan oksida dalam baja cair untuk membentuk kalsium oksida, dan berpartisipasi dalam pembentukan selubung oksida baja, sehingga mengurangi kandungan oksigen dalam baja cair, sehingga meningkatkan kualitas. kemurnian dan kemurnian baja. kekuatan.

 

3. Efek penyesuaian paduan: Silikon dan kalsium dalam blok kalsium silikat merupakan zat pereduksi dan elemen paduan. Penambahan blok kalsium silikat pada baja cair dapat menyesuaikan kandungan nonlogam pada baja cair dan menyebabkan perubahan unsur paduan pada baja. Misalnya, blok kalsium silikat dengan kandungan silikon lebih tinggi dapat digunakan untuk meningkatkan kandungan silikon dan meningkatkan kandungan unsur paduan silikon, sehingga meningkatkan sifat baja dan beradaptasi dengan kebutuhan aplikasi yang berbeda. Proses produksi tungku listrik kalsium silikon: Produksi paduan kalsium silikon relatif kompleks. Bahan baku utama dalam proses produksinya adalah kuarsa (Si02,), batu kapur (CaCO3,) dan campuran zat pereduksi (terutama batubara kokas dan bitumen).

 

Calcium silicon alloy is an ideal deoxidizer and desulfurizer currently used in the production process of high-quality steel, special steel and special alloys. It is also used as an inoculant for cast iron and an additive in the production of ductile iron. Both calcium and silicon have strong affinity with oxygen. Calcium, in particular, has a strong affinity not only with oxygen, but also with sulfur and nitrogen. Calcium silicon alloy not only has strong deoxidizing ability, and the deoxidation products are easy to float and be discharged, but also can improve the properties of steel and improve the toughness, impact toughness and fluidity of steel.   The role of calcium silicate blocks in steel smelting is mainly reflected in the following aspects:  1.Desulfurization: The silicon and calcium in the calcium silicate block have strong reducing properties and can react with the oxides in the molten steel to generate volatile gas hydrogen sulfide (H2S), thereby reducing and volatilizing the sulfur in the molten steel. Go out to achieve the purpose of desulfurization and improve the quality of steel.  2.Deoxidation: The calcium in the calcium silicate block reacts with the oxides in the molten steel to form calcium oxide, and participates in the formation of the oxide envelope of the steel, thereby reducing the oxygen content in the molten steel, thereby improving the purity and purity of the steel. strength.  3. Alloy adjustment effect: Silicon and calcium in calcium silicate blocks are both reducing agents and alloy elements. Adding calcium silicate blocks to molten steel can adjust the non-metal content in the molten steel and cause changes in the alloying elements in the steel. For example, calcium silicate blocks with higher silicon content can be used to increase the silicon content and increase the content of the alloying element silicon, thereby improving the properties of steel and adapting to different application requirements. Calcium silicon electric furnace production process: The production of calcium silicon alloy is relatively complex. The main raw materials in the production process are quartz (Si02,), limestone (CaCO3,) and reducing agent mixture (mainly coke and bituminous coal).  Calcium silicon alloy is produced by reducing silicon dioxide and calcium oxide using a carbonaceous reducing agent in a reduction electric furnace. The conventional production methods of calcium silicon alloy can be divided into three types, namely: mixed feeding method, layered feeding method and two-step method. Mixed feeding method, also known as one-step method. Use a carbonaceous reducing agent to simultaneously reduce silica and calcium oxide, that is, mix all the raw materials evenly and add them into the furnace in small batches. The mixing and feeding method is simple to operate and easy to control.

 

Paduan kalsium silikon diproduksi dengan mereduksi silikon dioksida dan kalsium oksida menggunakan zat pereduksi karbon dalam tungku listrik reduksi. Metode produksi konvensional paduan kalsium silikon dapat dibagi menjadi tiga jenis, yaitu: metode pengumpanan campuran, metode pengumpanan berlapis, dan metode dua langkah. Metode pemberian pakan campuran, juga dikenal sebagai metode satu langkah. Gunakan zat pereduksi karbon untuk mereduksi silika dan kalsium oksida secara bersamaan, yaitu mencampur semua bahan mentah secara merata dan menambahkannya ke dalam tungku dalam jumlah kecil. Metode pencampuran dan pengumpanan mudah dioperasikan dan dikendalikan.

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