Tsarin tsari na lahani haɗawa a cikin simintin epc

1 Haɗa lahani a cikin simintin epc

 

Lalacewar haɗawa a cikin simintin epc na gama gari. Lalacewar haɗawa a cikin simintin epc sau da yawa yana rage kaddarorin simintin. A lokaci guda, saboda rashin daidaituwar siffar haɗawa, yana iya haifar da tsagewa ko ma tsagewar simintin gyare-gyare yayin sabis. Lalacewar haɗawa ba kawai rage abubuwan simintin ba, har ma suna haɓaka taurin gida na simintin gyaran kafa saboda lahani na ƙasa, wanda zai iya haifar da ƙarancin mashin ɗin cikin sauƙi, yana shafar ingancin yankewa da lalata kayan aiki. Lalacewar haɗawa a cikin simintin epc gabaɗaya gungu ne marasa daidaituwa tare da ƙarancin haɗawa da rashin daidaituwa, wanda kuma aka sani da slag porosity.

 

1.1 Siffar lahani a ciki wasan kwaikwayo na epc

 

Lalacewar haɗar simintin epc sune slag, slag porosity da haɗa yashi. Siffar lahani sau da yawa bambanta, gefen siffar ba daidai ba ne, girman ya bambanta, a cikin rarraba tari, slag da slag pores gabaɗaya baki da launin toka, launi daban-daban. Akwai powdery abubuwa a cikin wani lahani rami, ko m karfe slag a cikin karfe ruwa, ko m sharan daga pyrolysis na irin wannan kayan, ko fenti a cikin rashin daidaituwa ko na yau da kullum haske launin toka powdery abubuwa.

 

1.2 Haɗa ɓangarori masu haɗari na ɓacewa simintin gyaran kafa

 

Haɗa a cikin simintin gyare-gyaren da aka ɓace yana da sauƙin faruwa, kuma akwai wasu ƙa'idodi bisa ga tsarin simintin gyare-gyare daban-daban, ƙirar ƙira, fasahar samarwa da yanayi. Dalilin samuwar yana da alaƙa da abun ciki na ragowar a cikin ƙarfe na ruwa, tsarin zubar da matsi mara kyau, yanayin kwararar ƙarfe na ruwa da tsarin ƙarfafawa na simintin gyare-gyare. Don simintin gyare-gyaren ƙarfe na bakin ciki tare da juriya na zafi, sa juriya da juriya na lalata, lahani ko lahani na ramin slag yana da sauƙin faruwa, galibi a cikin sassan da ke da alaƙa da ƙofar ko tashi. Sassan da ke da alaƙa da tsarin cika simintin simintin gyare-gyare, kwararar ruwa na dogon lokaci, don kiyaye lokacin zafi ya fi tsayi, ƙarfen ruwa don jefar da abu mai zafi, ɗan narkewar kayan simintin, ƙara yawan iskar gas a cikin ƙarfen ruwa da haɗawa ta hanyar toshe. tara, narkakkar karfe sanyaya da solidification shrinkage, sauki sa wadannan sassa bayan sanyaya solidification form rami, shrinkage porosity, slag gauraye lahani.

 

2 Cika tsarin da aka rasa na simintin gyare-gyare

 

Ana samun lahani na simintin gyare-gyare a lokacin da ake cika simintin gyare-gyare da ƙarfafa tsarin. Gabaɗaya, lokacin cika ƙanana da matsakaitan simintin gyare-gyare na ƴan daƙiƙa kaɗan ne kawai, fiye da daƙiƙa goma ko dubun ɗari, kuma lokacin cika manyan simintin kuma ana kammala shi cikin ƴan mintuna kaɗan. Daban-daban da simintin rami na yau da kullun, musamman na cika ƙura a cikin simintin epc shine babban dalilin samuwar lahani.

 

2.1 Ciko nau'in simintin epc

 

Game da asarar kumfa mai cike da ruwa mai cike da ƙarfe, ƙirar ƙarfe mai cike da ruwa, daga kofa zuwa cikin simintin, bayan “kogon” fan fan na gaba gaba, ƙarƙashin tasirin nauyi, ƙarfen ruwa yana cika ƙasa nakasawa, amma gabaɗaya. yanayin yana ci gaba zuwa ga nisa daga ƙofar, har sai "ramin" ya cika. Siffar iyaka ta lamba tsakanin ƙarfe na ruwa da siffa yana da alaƙa da zafin jiki na ƙarfe na ruwa, kaddarorin kayan siffa da saurin cikawa. Idan yawan zafin jiki na ƙarfen ruwa ya fi girma, girman siffar ya zama ƙarami kuma saurin cikawa yana da sauri, gabaɗayan saurin ci gaban ƙarfen ruwa yana da sauri. Don aluminium alloy ba tare da zubar da matsi mara kyau ba, ana iya raba mu'amala tsakanin karfen ruwa da siffa zuwa nau'ikan nau'ikan guda hudu: yanayin lamba, yanayin sharewa, yanayin rugujewa da yanayin shiga.

 

2.2 Rubutun ilimin halittar jiki da tasirin abin da aka makala bango na cika ƙarfe na ruwa

 

A cikin tsarin samar da simintin gyaran gyare-gyaren da aka yi hasarar, busasshen yashi na yashi yana ƙarfafa ta hanyar yin amfani da matsi mara kyau ga busassun yashi a lokacin aikin simintin gyare-gyare, ta yadda samfurin ya sami isasshen ƙarfi da taurin kai don tsayayya da tasiri da buoyancy na ƙarfe na ruwa, don haka kamar yadda don tabbatar da mutunci da tasiri na mold a cikin dukan tsarin simintin gyare-gyare da ƙarfafawa, da kuma samun cikakken tsarin simintin. Matsi mara kyau yana ba da damar simintin simintin gawa na baki a cikin yanayin da ya ɓace. Busasshen yashi na yashi yana da isasshen ƙarfi da tauri don ƙyale aikin simintin ya ci gaba ba tare da ƙara tsayin akwatin yashi ba.

 

3 Tushen haɗawa a cikin ƙarfe na ruwa

 

Hadawa da gas a cikin ruwa karfe kafofin sun hada da da yawa al'amurran, kamar bayyanar da gasification saura pyrolysis kayayyakin da gas, ruwa karfe smelting tsari na ɓangaren litattafan almara ne da gas, kuma ɓangaren litattafan almara suna samuwa ta hanyar hadawan abu da iskar shaka na ruwa karfe oxide, akwai wasu gas. a cikin babban zafin jiki na ruwa na ƙarfe don narke, da tarkace a cikin rami da aka rufe “, da sauransu.

 

4 Hanyoyi don rage haɗawa cikin batattu mutu simintin

 

4.1 Rage abubuwan da aka haɗa na asali a cikin ƙarfe na ruwa

 

Rage abubuwan da aka haɗa a cikin ƙarfen ruwa kafin a zubowa ita ce babbar hanyar da za a rage haɗa cikin sassan simintin ƙarfe. Akwai hanyoyi da yawa don tsarkake ruwa karfe. Ana iya amfani da mai tsabtace ruwa na ƙarfe, wato, ana iya amfani da kayan tattara slag. Haɗin ƙananan ƙwayoyin cuta za a iya tallata su akan manyan ɓangarorin haɗawa ta hanyar dogaro da tallan haɗakarwa don samar da ɓangarorin haɗawa da yawa, waɗanda ke da fa'ida don haɓaka yanayin haɓakar yanayin sa iyo.

 

4.2 Ya kamata a dauki matakan tsari don rage haɗawa a cikin ruwa na ƙarfe da ƙarfafa cire haɗin gwiwa

 

(1) Madaidaicin ƙira na tsarin zube riser: gwargwadon yadda zai yiwu a yi amfani da simintin ƙasa da akwati ɗaya, gwargwadon yiwuwar rage lokacin ruwan ƙarfe a cikin tsarin zubarwa, wato, don rage ko soke mai gudu; Yawan simintin gyare-gyare a cikin akwati ɗaya ba makawa zai sa tsarin zubar da ruwa ya yi tsayi sosai. Lokacin da ruwan ƙarfe ya ratsa ta cikin tsarin zubar da ruwa, yana da sauƙi don samar da tashin hankali da fantsama a cikin tashoshi da yawa da maɗaukaki na tsarin zubar da ruwa, wanda ya rage yawan zafin jiki na ruwa na karfe, yana haifar da oxygenation na ruwa na karfe. scour gefen bango na spate da kuma ƙara na asali inclusions a cikin karfe ruwa.

 

(2) Daidaitaccen raguwar matsa lamba mara kyau: matsa lamba mara kyau shine muhimmin dalili na haɓaka tashin hankali wanda ya haifar da cikawar ruwa na ƙarfe. Ƙarar tashin hankali yana haifar da narkakkar ƙarfe don wanke tsarin gating da bangon "kogon", yana haifar da fantsama da samar da vortices masu gudana waɗanda ke cikin sauƙi a cikin haɗawa da gas.

 

4.3 Hana tarkace na waje shiga cikin rami

 

(1) bayyanar "kogon" da busassun yashi hatimi: zubar da tsarin bayyanar da bayyanar simintin gyare-gyare da yashi bushe tsakanin hatimi ba sauki ba ne don haifar da yashi bushe a cikin "kogon", rufewa yafi dogara da shafi, aikin shafi don saduwa da bukatun. , kauri iri-iri, musamman ma a bayyanar kusurwar ciki, don hana tari mai kauri da yawa wanda ke haifar da tsagewa ko faɗuwa.

 

(2) rage haɗin haɗin sifa: yawancin gibin haɗin sifa, mai sauƙi don haifar da canji mai yawa a cikin adadin manne da aka yi amfani da shi a cikin ratar, yana haifar da haɗin gwiwa na manne ko concave.

 

(3) kamar yadda ya zuwa yanzu don amfani da kyau kumfa gyare-gyaren simintin gyaran kafa bayyanar da simintin gyaran kafa tsarin bayyanar: idan saboda samar da tsari iya kawai amfani da farantin yankan bayyanar, bayyanar da surface ya kamata a da kyau bi da, goge da kuma tsabta, a lokacin da ya cancanta. , tare da cika manna don santsi ramukan gida da ramuka.

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Lokacin aikawa: Satumba 14-2021