Basa rakakosha regirini silicon carbide poda mune refractory zvinhu
Green silicon carbide poda, zita rinonzwika rakaoma. Chaizvoizvo imhando yesilicon carbide (SiC), iyo yakanyungudutswa inopfuura 2000 madhigirii muchoto chekudzivirira nezvinhu zvakasvibirira zvakadai sejecha requartz uye petroleum coke. Yakasiyana neyakajairwadema nesilicon carbide, ine kunyatso kudzora kwemaitiro muchikamu chekupedzisira chekunyunguduka, ine tsvina shoma shoma uye yakakwirira yekristaro kuchena, saka inopa yakasarudzika girinhi kana rima rakasvibira ruvara. Uku "kuchena" kunopa kunenge kuoma kwakanyanyisa (kuoma kweMohs kwakakwira se9.2-9.3, yechipiri chete kune diamond uye boron carbide) uye yakanyanya kunaka yekupisa yekupisa uye kusimba kwepamusoro-tembiricha. Munhandare yezvigadzirwa zvinoramba, i "pfupa rakaoma" rinogona kumira, kurwa, kupisa uye kuvaka.
Saka, iyi poda yakasvibirira inogona sei kuratidza simba rayo munyika ine hutsinye yezvinhu zvinoramba uye kuva "murume akakosha" akakosha?
Kuvandudza simba uye kukanda kutonhora kwepamusoro "mapfupa esimbi": Zvinhu zvinoramba zvichitya zvikuru "kusakwanisa kumira" kutonhora kwepamusoro, kunyorova uye kuparara.Green silicon carbide micropowderine kuoma kwakanyanya uye yakanakisa kusimba kwepamusoro-tembiricha. Kuiwedzera kune akasiyana refractory castables, ramming zvinhu kana zvidhinha kwakafanana nekuwedzera yakakwirira-simba simbi mesh kune kongiri. Iyo inogona kuumba yakasimba rutsigiro skeleton mune matrix, ichipikisa zvakanyanya deformation uye kupfava kwezvinhu pasi pepamusoro tembiricha mutoro. Iyo inokandwa yekuputika kwevira resimbi chiteshi chesimbi yakakura yakashandisa zvinhu zvakajairika zvisati zvaitika, izvo zvakanyura nekukurumidza, kuyerera kwesimbi hakugone kuwedzera, uye kugara uchigadzirisa kunonoka kugadzirwa. Gare gare, kubudirira kwehunyanzvi kwakaitwa, uye chikamu chegreen silicon carbide micropowder yakawedzerwa zvikuru. “Hei, zvinoshamisa!” Mukuru mukuru weshopu akayeuka gare gare, kuti: “Apo chinhu chitsva chakaiswa, simbi yakanyungudutswa yakayerera, rutivi rwechanera sezviri pachena ‘rwakatsemurwa’, kuyerera kwesimbi kwakapidiguka, uye nhamba yenguva dzokuichengeta yakaderedzwa neinopfuura hafu, uye mari yaichengetwa yakanga iri mari chaiyoiyo!” Uku kuoma ndiko hwaro hwehupenyu hurefu hwemidziyo yekupisa kwepamusoro.
Kuvandudza kuitisa kupisa uye kuisa "kupisa kunyura" pane izvo zvinhu: Iyo yakanyanya kupisa-inodzivirira iyo refractory zvinhu zviri nani! Kune nzvimbo dzakaita senge coke oven magonhi uye aluminium electrolytic cell side madziro, iyo pachayo inoda kukurumidza kuitisa kupisa kwemukati kudzivirira tembiricha yemuno kuti isanyanya kukwira uye kukuvara. Iko kupisa kwemafuta egirinhi silicon carbide micropowder zvirokwazvo "mudzidzi akanakisa" pakati pezvinhu zvisiri zvesimbi (tembiricha yekamuri yekupisa conductivity coefficient inogona kusvika kupfuura 125 W/m·K, inova kakapetwa kakawanda kupfuura yezvidhinha zvevhu zvakajairika). Kuiwedzera kune iyo refractory zvinhu mune imwe chikamu kwakafanana nekupinza inoshanda "yekupisa pombi" mumidziyo, iyo inogona zvakanyanya kuvandudza iyo yose yekupisa conductivity, kubatsira kupisa kuti kukurumidza uye zvakaenzana kubviswa, uye kudzivirira kupisa kwenzvimbo uye kupepeta kana kukuvadzwa kunokonzerwa ne "heartburn".
Wedzera kupisa kwekuvhunduka uye kukudziridza kugona "kuramba wakadzikama mukutarisana neshanduko": Imwe yeanonyanya kunetsa "mhondi" yezvinhu zvinodzivirira inokurumidza kutonhora nekudziya. Choto chinobatidzwa uye chinodzimwa, uye tembiricha inoshanduka zvine chisimba, uye zvinhu zvakajairika zviri nyore "kuputika" nekubvisa.Green silicon carbidemicropowder ine diki yekupisa yekuwedzera coefficient uye inokurumidza kupisa conductivity, inogona kukurumidza kuenzanisa kushushikana kunokonzerwa nekusiyana kwekushisa. Kuiunza muiyo refractory system inogona kuvandudza zvakanyanya kugona kwechinhu kurwisa kushanduka kwekushisa kamwe kamwe, ndiko kuti, "thermal shock resistance". Muromo wehovhoni simbi inokandwa yechoto inotenderedza simende inobatwa nechando chakanyanya uye chinopisa kwazvo, uye upenyu hwayo hupfupi hwakanga huri chinetso chenguva refu. Mumwe injiniya wechoto ane ruzivo rwokuzviwanira akandiudza kuti: “Kubvira pakashandiswa midziyo yokukandwa yakasimba zvikuru ine green silicon carbide micropowder sechinhu chikuru chakaunganidzwa noupfu, migumisiro yacho yave ichikurumidza.” Kana mhepo inotonhora ichivhuvhuta apo choto chinomiswa kuti chigadziriswe, zvimwe zvikamu zvinotsemuka, asi muromo wehovhoni iyi yakasimba uye yakatsiga, uye kuparara kwepasi kunoderera zvishomanene, kuparara kwepasi kunodzikira. kuedza!” Uku "kudzikama" ndiko kubata nekukwira nekudzika mukugadzirwa.
Nokutigreen silicon carbide micropowder inosanganisa simba repamusoro, high thermal conductivity, yakanakisa kupisa kutyisa kuramba, uye kusimba kwekukukurwa kwevhu, yave "soul mate" mukugadzirwa kwezvinhu zvemazuva ano zvepamusoro-performance refractory. Kubva pamoto unoputika, maconverter, matangi esimbi, uye matangi etorpedo musimbi uye simbi simbi kusvika kumasero emagetsi mune nonferrous metallurgy; kubva pazvikamu zvakakosha zvemasimbi esimende uye honi dzemagirazi muindasitiri yezvivakiso kusvika kune zvinopisa zvakanyanya mumunda weindasitiri yemakemikari, simba remagetsi, nekupisa marara, uye kunyange kudira makapu uye kuyerera kwesimbi zvidhinha zvekukandira… Pese pane kupisa kwakanyanya, kupera, kushanduka kamwe kamwe, uye kukukurwa, iyi micropowder yegirini inoshanda. Iyo yakadzikatirwa chinyararire muzvidhinha zvese zvinoramba uye mativi ese ekukandwa, achipa kuchengetedzwa kwakasimba kwe "moyo" weindasitiri - yakakwirira-tembiricha kilns.
Ehe, "kurima" kwegirini silicon carbide micropowder pachayo haisi nyore. Kubva pakusarudzwa kwezvinhu zvakasvibirira, kudzora kwakaringana kwekunyungudutsa kwechoto chekunyungudutsa (kuve nechokwadi chekuchena uye kusvibira), kusvika pakupwanya, kukuya, kunhonga uye kubvisa tsvina, hydraulic kana kuyerera kwemhepo kurongeka, kurongedza kwakasimba zvinoenderana nesaizi yekugovera (kubva kune mashoma mamicrons kusvika kumazana emakroni), nhanho imwe neimwe ine hukama nekuita kwakagadzikana kwechigadzirwa chekupedzisira. Kunyanya, kuchena, chidimbu saizi kugovera uye chimiro chechidimbu cheiyo micropowder inokanganisa zvakananga dispersibility uye mhedzisiro muzvinhu zvinoramba. Zvinogona kutaurwa kuti yakakwirira-yemhando yegirini silicon carbide micropowder ndiyo pachayo chigadzirwa chekusanganiswa kwehunyanzvi uye hunyanzvi.