Ngaba i-carbon electrode, i-graphite electrode kunye ne-self-baking electrode kufuneka zisetyenziswe ngokuchanekileyo kwishishini le-arc elifakwe emanzini?

Uhlobo, ukusebenza kunye nokusetyenziswa kwe-electrode

Uhlobo lwe-Electrode

Ii-electrode zeCarbonaceous zingahlelwa zibe yi-carbon electrode, i-graphite electrode kunye ne-self-baking electrode ngokusetyenziswa kwazo kunye neenkqubo zokuvelisa.

I-carbon electrode yenziwe nge-low-ash anthracite, i-coke ye-metallurgical, i-pitch coke kunye ne-petroleum coke. Iqulunqwe ngomlinganiselo othile kunye nobukhulu bamasuntswana. Xa udibanisa, i-asphalt ye-binder kunye ne-tar ixutywe, kwaye umxube uxutywe ngokulinganayo kwiqondo lokushisa elifanelekileyo. Ukwenza, kwaye ekugqibeleni ukukhawuleza ukucima kwi-roaster. Inokwahlulwa ibe yi-electrode ye-graphite yendalo, i-electrode yegraphite eyenziweyo, i-carbon electrode kunye ne-carbon electrode ekhethekileyo.

I-electrode yegraphite (i-graphiteelectrode) yenziwe nge-petroleum coke kunye ne-pitch coke njengento ekrwada, kwaye emva koko ifakwe kwisithando sombane sokumelana nombane kunye nobushushu be-2273 ~ 2773K, kwaye yenziwe kwi-graphite electrode nge-graphitization. I-electrode yegraphite yahlulwe ngakumbi ngolu hlobo lulandelayo.

I-electrode eqhelekileyo yegraphite yamandla ivumela ukusetyenziswa kweeelectrode zegraphite ezinoxinano lwangoku olungaphantsi kwe-17 A/cm2, kwaye isetyenziswa ikakhulu kwiziko lombane eziqhelekileyo ezifana nokwenza intsimbi, ukucokisa isilicon, kunye nephosphorus etyheli.

Umphezulu we-anti-oxidation coated graphite electrode uqatywe ngoluhlu olukhuselayo (i-graphite electrode antioxidant) eqhubayo kwaye iyamelana ne-oxidation yobushushu obuphezulu, okunciphisa ukusetyenziswa kwe-electrode ngexesha lentsimbi (19% ~ 50%) kwaye yandisa ubomi benkonzo. ye-electrode (22% ~ 60%), ukunciphisa ukusetyenziswa kwamandla e-electrode.

I-electrode ye-graphite yamandla aphezulu ivumela ukusetyenziswa kwe-electrode ye-graphite kunye nokuxinana kwangoku kwe-18 ukuya kwi-25 A / cm2, esetyenziswa kakhulu kwii-ovens ze-arc zombane eziphezulu ze-steelmaking.

Iielectrode zegraphite ezinamandla aphezulu zivumela ukusetyenziswa kweeelectrode zegraphite ezinoxinano lwangoku olungaphezu kwe-25 A/cm2. Isetyenziswa kakhulu kwi-ultra-high power steelmaking arc furnaces zombane.

I-electrode yokubhaka ngokwakho (i-selfbakingelectrode) isebenzisa i-anthracite, i-coke, ibhitumene kunye netha njengezinto eziluhlaza, ukwenza intlama ye-electrode kwiqondo elithile lobushushu, kwaye emva koko ilayishe intlama ye-electrode kwi-electrode case eye yaxhonywa kwiziko lombane (njengoko kubonisiwe. kwi-FIG 1), kwinkqubo yokuvelisa isithando sombane, ubushushu beJoule obuveliswa ngokudlula kombane kunye nobushushu bokuqhuba. eziko bayazenzela kwaye baphekwe. I-electrode enjalo ingasetyenziselwa ngokuqhubekayo, kwaye inokubunjwa ngokudibanisa umgca wecala elide kwaye inokukhutshwa kwi-diameter enkulu. I-electrode yokubhaka isetyenziselwa ngokubanzi ukuveliswa kwe-ferroalloy ngenxa yenkqubo yayo elula kunye neendleko eziphantsi.

Umzobo 1 Umzobo weSchematic weqokobhe le-electrode

I-1-electrode shell; Iqhekeza le-2-rib; Ulwimi olu-3-triangle

Ukusebenza kobugcisa obuphambili be-electrode

Izinto ze-electrode kufuneka zibe nezi mpawu zilandelayo ze-physicochemical:

I-conductivity ingcono, ukuxhathisa kuncinci, ukunciphisa ilahleko yamandla ombane, ukunciphisa ukuhla kwamandla ombane we-net omfutshane, kunye nokwandisa amandla ombane osebenzayo ukwandisa amandla echibi elinyibilikisiweyo;

Indawo yokunyibilika iphezulu;

I-coefficient yokwandiswa kwe-thermal incinci, xa iqondo lokushisa litshintsha ngokukhawuleza, akulula ukuguqulwa, kwaye uxinzelelo lwangaphakathi olubangelwa ukutshintshwa kweqondo lokushisa alukwazi ukuvelisa ukuqhekeka okulungileyo ukwandisa ukuchasana;

Yiba namandla aneleyo omatshini kumaqondo obushushu aphezulu;

Ukungcola kuphantsi kwaye ukungcola akungcolisi umnyibilikisi.

Iimpawu eziphambili zezobugcisa ze-carbon electrode, i-graphite electrode kunye ne-self-baking electrode iboniswe kwiThebhile 1 kunye neMifanekiso 2 kunye ne-3.

Itheyibhile yoku-1 yokusebenza kobugcisa be-Electrode

Umzobo 2 Utshintsho lwe-resistiveivity ye-carbon electrode kunye ne-graphite electrode kunye nobushushu

Umzobo 3 I-Thermal conductivity ye-carbon kunye ne-graphite electrode njengomsebenzi weqondo lokushisa

Ukukhethwa kwee-electrode kwishishini le-ferroalloy

Ii-electrodes ezizibhakelayo zisetyenziswa kakhulu kwintsimbi yokunyibilikisa, ukusulungekiswa kweferrosilicon, isilicon chromium alloy, manganese silicon alloy, high carbon ferromanganese, high carbon ferrochrome, medium and low carbon ferromanganese, medium and low carbon ferrochrome, silicon calcium alloy, tungsten iron Yima. . Ii-electrodes ezizibhaka ngokwazo zikholisa ukunyusa imveliso yealloys, amabhanti entsimbi abe yikhabhoni, kwaye avelise ialloys zentsimbi kunye neentsimbi ezisulungekileyo ezinekhabhoni ephantsi kakhulu. Ukuba i-carbon ferrochrome, i-silicon yezoshishino kunye nesinyithi se-manganese, i-carbon okanye i-graphite electrode kufuneka isetyenziswe.

电极的种类、性能及其用途

电极种类

碳质电极按其用途及制作工艺不同可分為碳素电极、石墨电极和自焙电极三种.

碳素电极(carbonelectrode)是以低灰分的无烟煤、冶金焦、沥青焦和石油焦為原料，按一定的比例和粒度组成.混合时加入黏结剂沥.青和焦油，在适当的温度下搅拌均匀后压制成形，最后在焙烧炉缓慢焙烧制得。可分為天然石墨电极、人造石墨电极、碳电极以及特种碳素电极四类。

石墨电极(graphiteelectrode)以石油焦和沥青焦為原料制成碳素电极，再放到温14 石墨化电阻炉中，经石墨化而制成石墨电极„石墨电极又分為以下几。

普通功率石墨电极允许使用电流密度低于17A/cm2的石墨电极，主要用于炼钢、炼硅、炼黄磷等的普通功率电炉。

抗氧化涂层石墨电极表面涂覆既能导电又耐高温氧化的保护层(石墨电极抗氧化剂)，降低炼钢时的电极消耗(19%〜50%),延长电极的使用寿命(22%〜60%),降低电极的电能消耗.

高功率石墨电极允许使用电流密度為18〜25A/cm2的石墨电极，主要用于炼钢的高功率电。

超高功率石墨电极允许使用电流密度大于25A/cm2的石墨电极。主要用于超高功率炼钢。

自焙电极(selfbakingelectrode)用无烟煤、焦炭以及沥青和焦油为原料，在一定温度下制成电极糊，然后把电极糊装入已安装在电炉上的电极壳中(如图1所示)中依靠电流通过时所产生的焦耳热和炉内传导热，自行烧结焦化。边给结成形，且可焙烧成大直径的.