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Proces tavenia kremíka pre chemický priemysel
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Proces tavenia kremíka pre chemický priemysel

Proces tavenia kremíka pre chemický priemysel

Zrnitosť: prispôsobená podľa požiadaviek zákazníkaBalenie: tony vriec, bubnov atď.

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Technologický proces kremíka na chemické použitie zahŕňa prípravu vsádzky do pece, tavenie v elektrickej peci, rafináciu a odlievanie kremíka a drvenie na odstraňovanie troskových inklúzií. Všetky suroviny musia pred prípravou vsádzky prejsť potrebnou úpravou. Oxid kremičitý sa drví v čeľusťovom drviči, kým veľkosť kúskov nie je väčšia ako 100 mm, a kúsky menšie ako 5 mm sa preosejú a premyjú vodou. Pretože úlomky v peci sa tavia v hornej časti pece, znižuje sa priepustnosť plynu vsádzky, čo sťažuje výrobný proces. Ropný koks má relatívne vysokú elektrickú vodivosť, preto sa musí rozbiť na veľkosť nie väčšiu ako 10 mm a množstvo práškového ropného koksu sa musí kontrolovať. Pretože horí priamo na ústí pece, spôsobí to nedostatočné redukčné činidlo.

 

Pri výrobe chemického kremíka môže bitúmenové uhlie úplne nahradiť drevené uhlie, ako je rafinované bitúmenové uhlie Hunan Zhuzhou, pevný uhlík dosahuje 77,19 percenta, prchavá látka je 19,4 percenta, obsah popola je 3,41 percenta, obsah Fe2O3 je {{8 }},22 percent, obsah Al2O3 je 0,99 percent a obsah CaO je 0,17 percent. . Podľa výrobnej praxe je možné použiť tento druh bitúmenového uhlia na tavenie chemického kremíka.

 

Bloky a triesky na výrobu kremíka pre chemické použitie sú spracovávané rezačkami dreva a štiepkovačmi dreva. Uhlíkatým redukčným činidlom v peci je hlavne ropný koks a bitúmenové uhlie a množstvo drevených blokov a drevených štiepok závisí od podmienok pece. Pri výrobe sa nepoužíva drevo, ale kvalita produktu je stabilnejšia. Pomer vsádzky sa určuje podľa kvality produktu, ktorý sa má vyrobiť. Podiel ropného koksu a bitúmenového uhlia sa určuje podľa množstva uhlíka potrebného na každú dávku rudného kremíka. Pomer ropného koksu a bitúmenového uhlia má veľký vplyv na pracovný odpor vsádzky.

 

Po odvážení každej zložky vsádzky do pece sa vsádzka rovnomerne premieša a po rozklepaní pece sa rovnomerne premiešaná vsádzka pridá do pece. Udržujte určitú výšku povrchu materiálu a podávajte rovnomerne.

 

Výroba chemického kremíka je nepretržitá. Ani podmienky vo vnútri pece nie sú večné. Chemická výroba kremíka je proces, pri ktorom sa elektrická energia premieňa na tepelnú energiu v elektrickej peci a potom sa tepelná energia používa na priame zahrievanie materiálu na vytvorenie chemickej reakcie. Preto sú elektrické charakteristiky v peci veľmi dôležité. Taviaca operácia je uzavretý oblúk, aby sa udržala vysoká teplota pece, zlepšila sa tepelná účinnosť a zlepšila sa miera využitia elektrickej pece. Vo výskume je použitá kovová kremíková pec s kapacitou 3200KVA a 6300KVA. Tavenie sa vykonáva dusením po určitú dobu a pravidelným koncentrovaným kŕmením. Za normálnych okolností je ťažké, aby sa náboj automaticky potopil a vo všeobecnosti je potrebné prinútiť náboj, aby sa potopil. Stav pece sa ľahko mení a je ťažké ho kontrolovať. Preto je potrebné správne posúdiť a včas sa s tým vo výrobe vysporiadať. Pec sa vypaľuje každé 4 hodiny na pranie a odlievanie a troska sa láme a triedi na sklad.

 

Smelting process of silicon for chemical industry  The technological process of silicon for chemical use includes furnace charge preparation, electric furnace smelting, silicon refining and casting, and crushing for removing slag inclusions. All raw materials must undergo necessary treatment before the charge is prepared. The silica is crushed in the jaw crusher until the size of the pieces is not more than 100mm, and the pieces smaller than 5mm are screened out and washed with water. Because the fragments in the furnace are melted in the upper part of the furnace, the gas permeability of the charge is reduced, making the production process difficult. Petroleum coke has a relatively high electrical conductivity, so it must be broken to a size of no more than 10mm, and the amount of petroleum coke powder must be controlled. Because it burns directly on the furnace mouth, it will cause insufficient reducing agent.  In the production of chemical silicon, bituminous coal can completely replace charcoal, such as Hunan Zhuzhou refined bituminous coal, the fixed carbon reaches 77.19%, the volatile matter is 19.4%, the ash content is 3.41%, the Fe2O3 content is 0.22%, the Al2O3 content is 0.99%, and the CaO content is 0.17%. . According to production practice, it is feasible to use this kind of bituminous coal to smelt chemical silicon.  Blocks and chips for the production of silicon for chemical use are processed with timber cutters and wood chippers. The carbonaceous reducing agent in the furnace charge is mainly petroleum coke and bituminous coal, and the amount of wood blocks and wood chips depends on the furnace conditions. Wood is not used in production, but the product quality is more stable. The ratio of the charge is determined according to the grade of the product required to be produced. The proportion of petroleum coke and bituminous coal is determined according to the amount of carbon required for each batch of ore silicon. The ratio of petroleum coke and bituminous coal has a great influence on the working resistance of the charge.  After each component of the furnace charge is weighed, the charge is mixed evenly, and after the furnace is pounded, the uniformly mixed charge is added to the furnace. Keep a certain height of the material surface and feed evenly.  Chemical silicon production is continuous. The conditions inside the furnace are not eternal either. Chemical silicon production is a process in which electric energy is converted into heat energy in an electric furnace, and then the heat energy is used to directly heat the material to produce a chemical reaction. Therefore, the electrical characteristics in the furnace are very important. The smelting operation is closed-arc to maintain the high temperature furnace, improve the thermal efficiency, and improve the utilization rate of the electric furnace. In the research, a metal silicon furnace with a capacity of 3200KVA and 6300KVA is used. The smelting is carried out by simmering for a certain period of time and regular concentrated feeding. Under normal circumstances, it is difficult for the charge to sink automatically, and it is generally necessary to force the charge to sink. The furnace condition is easy to fluctuate and difficult to control. Therefore, it is necessary to judge correctly and deal with it in time in production. The furnace is fired every 4 hours for scouring and casting, and the slag is broken and sorted into storage.Smelting process of silicon for chemical industry  The technological process of silicon for chemical use includes furnace charge preparation, electric furnace smelting, silicon refining and casting, and crushing for removing slag inclusions. All raw materials must undergo necessary treatment before the charge is prepared. The silica is crushed in the jaw crusher until the size of the pieces is not more than 100mm, and the pieces smaller than 5mm are screened out and washed with water. Because the fragments in the furnace are melted in the upper part of the furnace, the gas permeability of the charge is reduced, making the production process difficult. Petroleum coke has a relatively high electrical conductivity, so it must be broken to a size of no more than 10mm, and the amount of petroleum coke powder must be controlled. Because it burns directly on the furnace mouth, it will cause insufficient reducing agent.  In the production of chemical silicon, bituminous coal can completely replace charcoal, such as Hunan Zhuzhou refined bituminous coal, the fixed carbon reaches 77.19%, the volatile matter is 19.4%, the ash content is 3.41%, the Fe2O3 content is 0.22%, the Al2O3 content is 0.99%, and the CaO content is 0.17%. . According to production practice, it is feasible to use this kind of bituminous coal to smelt chemical silicon.  Blocks and chips for the production of silicon for chemical use are processed with timber cutters and wood chippers. The carbonaceous reducing agent in the furnace charge is mainly petroleum coke and bituminous coal, and the amount of wood blocks and wood chips depends on the furnace conditions. Wood is not used in production, but the product quality is more stable. The ratio of the charge is determined according to the grade of the product required to be produced. The proportion of petroleum coke and bituminous coal is determined according to the amount of carbon required for each batch of ore silicon. The ratio of petroleum coke and bituminous coal has a great influence on the working resistance of the charge.  After each component of the furnace charge is weighed, the charge is mixed evenly, and after the furnace is pounded, the uniformly mixed charge is added to the furnace. Keep a certain height of the material surface and feed evenly.  Chemical silicon production is continuous. The conditions inside the furnace are not eternal either. Chemical silicon production is a process in which electric energy is converted into heat energy in an electric furnace, and then the heat energy is used to directly heat the material to produce a chemical reaction. Therefore, the electrical characteristics in the furnace are very important. The smelting operation is closed-arc to maintain the high temperature furnace, improve the thermal efficiency, and improve the utilization rate of the electric furnace. In the research, a metal silicon furnace with a capacity of 3200KVA and 6300KVA is used. The smelting is carried out by simmering for a certain period of time and regular concentrated feeding. Under normal circumstances, it is difficult for the charge to sink automatically, and it is generally necessary to force the charge to sink. The furnace condition is easy to fluctuate and difficult to control. Therefore, it is necessary to judge correctly and deal with it in time in production. The furnace is fired every 4 hours for scouring and casting, and the slag is broken and sorted into storage.

 

Obsah produktov
Triedy produktov Chemické zloženie Chemické zloženie Chemické zloženie Chemické zloženie
    Nečistoty ( percentá ) Nečistoty ( percentá ) Nečistoty ( percentá )
  Obsah Si ( percentá ) Fe Al Ca
1101 99.79 0.1 0.1 0.01
2202 99.58 0.2 0.2 0.02
2502 99.48 0.25 0.25 0.02
3303 99.37 0.3 0.3 0.03
411 99.4 0.4 0.1 0.1
421 99.3 0.4 0.2 0.1
441 99.1 0.4 0.4 0.1
551 98.9 0.5 0.5 0.1
553 98.7 0.5 0.5 0.3
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