Sissejuhatus kaltsiumi ränisulamist elektriahju sulatusprotsessi

May 17, 2024Jäta sõnum

Kaltsiumi räni sulam on ideaalne desoksüdeerija ja väävlitustaja, mida praegu kasutatakse kvaliteetse terase, eriterase ja erisulamite tootmisprotsessis. Seda kasutatakse ka malmi inokulandina ja lisandina kõrgtugeva malmi tootmisel. Nii kaltsiumil kui ka ränil on tugev afiinsus hapnikuga. Eelkõige on kaltsiumil tugev afiinsus mitte ainult hapniku, vaid ka väävli ja lämmastikuga. Kaltsiumi ränisulamil pole mitte ainult tugev deoksüdatsioonivõime ning desoksüdatsiooniprodukte on lihtne hõljuda ja tühjendada, vaid need võivad parandada ka terase omadusi ning parandada terase sitkust, löögitugevust ja voolavust.

 

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.

 

Kaltsiumsilikaatplokkide roll terase sulatamisel kajastub peamiselt järgmistes aspektides:

 

1. Väävli eemaldamine: kaltsiumsilikaatploki ränil ja kaltsiumil on tugevad redutseerivad omadused ja need võivad reageerida sulaterase oksiididega, tekitades lenduva gaasilise vesiniksulfiidi (H2S), vähendades ja lendudes seeläbi sulaterase väävlit. Minge välja, et saavutada väävlitustamise eesmärk ja parandada terase kvaliteeti.

 

2. Deoksüdatsioon: kaltsiumsilikaatplokis olev kaltsium reageerib sulaterase oksiididega, moodustades kaltsiumoksiidi ja osaleb terase oksiidümbrise moodustamises, vähendades seeläbi sulaterase hapnikusisaldust, parandades seeläbi terase puhtus ja puhtus. tugevus.

 

3. Sulami reguleerimise efekt: kaltsiumsilikaatplokkides olev räni ja kaltsium on nii redutseerivad ained kui ka sulamielemendid. Kaltsiumsilikaatplokkide lisamine sulaterasele võib reguleerida sulaterase mittemetallide sisaldust ja põhjustada muutusi terase legeerelementides. Näiteks saab suurema ränisisaldusega kaltsiumsilikaatplokke kasutada ränisisalduse suurendamiseks ja legeeriva elemendi räni sisalduse suurendamiseks, parandades seeläbi terase omadusi ja kohanedes erinevate kasutusnõuetega. Kaltsiumiräni elektriahju tootmisprotsess: kaltsiumi räni sulami tootmine on suhteliselt keeruline. Peamisteks tooraineteks tootmisprotsessis on kvarts (Si02,), lubjakivi (CaCO3,) ja redutseerivate ainete segu (peamiselt koks ja bituumenkivisüsi).

 

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.

 

Kaltsiumi ränisulamit toodetakse ränidioksiidi ja kaltsiumoksiidi redutseerimisel süsinikusisaldusega redutseerija abil redutseerivas elektriahjus. Kaltsiumi ränisulami tavapärased tootmismeetodid võib jagada kolme tüüpi, nimelt: segasöötmise meetod, kihiline söötmismeetod ja kaheetapiline meetod. Segasöötmise meetod, tuntud ka kui üheetapiline meetod. Räni ja kaltsiumoksiidi samaaegseks redutseerimiseks kasutage süsinikku sisaldavat redutseerijat, st segage kõik toorained ühtlaseks ja lisage need väikeste partiidena ahju. Segamis- ja söötmismeetodit on lihtne kasutada ja seda on lihtne juhtida.

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