{"id":1325,"date":"2026-07-04T18:09:40","date_gmt":"2026-07-04T18:09:40","guid":{"rendered":"https:\/\/silicesantacruz.com\/?p=1325"},"modified":"2026-08-24T13:00:09","modified_gmt":"2026-08-24T13:00:09","slug":"sable-de-fonderie-siliceux-caracteristiques-usages-et-achat","status":"publish","type":"post","link":"https:\/\/silicesantacruz.com\/tr\/sable-de-fonderie-siliceux-caracteristiques-usages-et-achat\/","title":{"rendered":"Silisli d\u00f6k\u00fcm kumu: \u00f6zellikleri, kullan\u0131m alanlar\u0131 ve sat\u0131n alma"},"content":{"rendered":"
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\n Bu g\u00f6nderiyi de\u011ferlendirin<\/span>\n <\/div>\n <\/div>\n\n

Silisli d\u00f6k\u00fcm kumu nedir?<\/h2>\n\n\n\n

Silisli d\u00f6k\u00fcm kumu bir kal\u0131p kumu<\/strong> end\u00fcstriyel, esas olarak \u015funlardan olu\u015fan kuvars taneleri (SiO\u2082)<\/a>. D\u00f6k\u00fcm i\u00e7in uygun olarak nitelendirilebilmesi i\u00e7in, bu \u00fcr\u00fcn\u00fcn silisyum dioksit i\u00e7eri\u011fi en az 98 % olmal\u0131d\u0131r.<\/p>\n\n\n\n

\"sable<\/figure>\n\n\n\n

Bu kum, \u00e7ok y\u00fcksek s\u0131cakl\u0131klara maruz kalan demirli ve demirsiz metalleri bar\u0131nd\u0131rabilen kal\u0131plar\u0131n \u00fcretiminde kullan\u0131l\u0131r. Mevcut \u00e7e\u015fitli kum t\u00fcrleri aras\u0131nda, silis d\u00fcnya \u00e7ap\u0131nda en yayg\u0131n \u2014 ve en ekonomik \u2014 se\u00e7enek olarak \u00f6ne \u00e7\u0131kmaktad\u0131r.<\/p>\n\n\n\n

Bile\u015fim: silika, ba\u011flay\u0131c\u0131 ve su<\/h3>\n\n\n\n

Silisli d\u00f6k\u00fcm kumu, \u00fc\u00e7 temel bile\u015fene dayan\u0131r. Her biri, kal\u0131b\u0131n a\u015fa\u011f\u0131dakilere kar\u015f\u0131 dayan\u0131kl\u0131l\u0131\u011f\u0131nda belirli bir rol oynar: s\u0131v\u0131 metal<\/strong>.<\/p>\n\n\n\n

\u0130\u015fte kum-\u00e7im kar\u0131\u015f\u0131m\u0131n\u0131n tipik bile\u015fimi:<\/p>\n\n\n\n

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  • Silis (SiO\u2082)<\/strong> : Kar\u0131\u015f\u0131m\u0131n ila \u2019i %\u2019dir \u2014 bu madde, kum tanelerinin refrakter iskeletini olu\u015fturur ve 1 700 \u00b0C\u2019ye kadar dayan\u0131kl\u0131d\u0131r<\/li>\n\n\n\n
  • Bentonit<\/strong> : 5 ila 10 % \u2014 bu killi ba\u011flay\u0131c\u0131, kum tanelerini kaplayarak kal\u0131b\u0131n bir arada kalmas\u0131n\u0131 sa\u011flar<\/li>\n\n\n\n
  • Su<\/strong> : 2 ila 5 % \u2014 bentoniti etkinle\u015ftirir ve kar\u0131\u015f\u0131ma esneklik kazand\u0131r\u0131r<\/li>\n\n\n\n
  • Katk\u0131 maddeleri<\/strong> : Az miktarda \u2014 mineral karbon, dekstrin veya k\u00f6m\u00fcr, \u0131s\u0131 direncini ve y\u00fczey kalitesini art\u0131r\u0131r<\/li>\n<\/ul>\n\n\n\n

    Unutulmamas\u0131 gereken kural: Su miktar\u0131, kil miktar\u0131n\u0131n yakla\u015f\u0131k \u00fc\u00e7te birini olu\u015fturmal\u0131d\u0131r. Fazla su kal\u0131b\u0131 k\u0131r\u0131lgan hale getirir; yetersiz su ise yap\u0131\u015fkanl\u0131\u011f\u0131 ortadan kald\u0131r\u0131r.<\/p>\n\n\n\n

    \u00c7e\u015fitli d\u00f6k\u00fcm kumu t\u00fcrleri: ye\u015fil, ya\u011fl\u0131 ve kimyasal<\/h3>\n\n\n\n

    \u00dcretim ihtiya\u00e7lar\u0131na g\u00f6re \u00fc\u00e7 ana d\u00f6k\u00fcm kumu grubu bir arada kullan\u0131lmaktad\u0131r. \u0130lk olarak, kum renginden ye\u015file<\/strong> \u2014 en yayg\u0131n olan\u0131 \u2014 silis, bentonit ve su ilavesini birle\u015ftirerek \u0131s\u0131l i\u015flem gerektirmeyen bir kal\u0131p olu\u015fturur. 10 ila 800 mm boyutlar\u0131ndaki par\u00e7alar i\u00e7in uygundur ve tek adetten \u00e7ok b\u00fcy\u00fck serilere kadar \u00e7e\u015fitli \u00fcretim hacimlerini destekler.<\/p>\n\n\n\n

    Ayr\u0131ca, ya\u011fl\u0131 kum (veya petrobond) suyun yerine ya\u011fl\u0131 bir ba\u011flay\u0131c\u0131 kullan\u0131r. \u00c7ok ince par\u00e7ac\u0131k boyutu sayesinde hassas detaylar\u0131 yeniden \u00fcretebilir. Dikkat: D\u00f6k\u00fcm i\u015flemi s\u0131ras\u0131nda duman \u00e7\u0131kar ve uygun havaland\u0131rma gerektirir.<\/p>\n\n\n\n

    Son olarak, kimyasal sertle\u015fmeli kum<\/strong> bir kataliz\u00f6rle aktive edilmi\u015f silika ve re\u00e7inelerin kar\u0131\u015f\u0131m\u0131 (kar\u0131\u015f\u0131m\u0131n %1 ila %2'si). Bu y\u00f6ntem, 80 tona kadar par\u00e7alar\u0131 bar\u0131nd\u0131rabilen \u00e7ok rijit kal\u0131plar \u00fcretir. Kullan\u0131ma haz\u0131r olarak sunulan bu y\u00f6ntem, \u00f6zellikle y\u00fcksek standartlara sahip k\u00fc\u00e7\u00fck seri \u00fcretimler i\u00e7in uygundur.<\/p>\n\n\n\n

    D\u00f6k\u00fcm kumumuzun teknik \u00f6zellikleri<\/h2>\n\n\n\n

    Tane boyutu, yo\u011funluk ve \u0131s\u0131 iletkenli\u011fi<\/h3>\n\n\n\n

    Kumun tane boyutu, \u015fu y\u00f6ntemle \u00f6l\u00e7\u00fcl\u00fcr:\u2019AFS incelik indeksi<\/strong> : Bu indeks ne kadar y\u00fcksekse, tane yap\u0131s\u0131 o kadar incedir. D\u00f6k\u00fcmler s\u00f6z konusu oldu\u011funda, d\u00f6k\u00fcmhaneler 55 ile 65 AFS aras\u0131ndaki bir indeksi hedefler. Al\u00fcminyum gibi hafif ala\u015f\u0131mlar ise daha y\u00fcksek indekslere dayanabilir.<\/p>\n\n\n\n

    Tanelerin \u015fekli de ayn\u0131 derecede belirleyici bir rol oynar. Yuvarlak taneler ba\u011flay\u0131c\u0131 t\u00fcketimini azalt\u0131r ve ge\u00e7irgenli\u011fi art\u0131r\u0131rken, k\u00f6\u015feli taneler kal\u0131b\u0131n mekanik mukavemetini art\u0131r\u0131r.<\/p>\n\n\n\n

    \u0130\u015fte ak\u0131lda tutulmas\u0131 gereken \u00fc\u00e7 temel fiziksel \u00f6zellik:<\/p>\n\n\n\n

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    • G\u00f6r\u00fcn\u00fcr yo\u011funluk<\/strong> : kuru silisli kum i\u00e7in yakla\u015f\u0131k 1,52 kg\/dm\u00b3<\/li>\n\n\n\n
    • Is\u0131l iletkenlik<\/strong> : 0,25 W\/(m\u00b7K) \u2014 kum, \u0131s\u0131y\u0131 yava\u015f bir \u015fekilde iletir; bu da d\u00f6k\u00fcm metalin so\u011fumas\u0131n\u0131 yava\u015flat\u0131r<\/li>\n\n\n\n
    • \u00d6zg\u00fcl \u0131s\u0131 kapasitesi<\/strong> : 830 J\/(kg\u00b7K), par\u00e7alar\u0131n kat\u0131la\u015fma h\u0131z\u0131n\u0131 do\u011frudan belirleyen bir parametre<\/li>\n<\/ul>\n\n\n\n

      Is\u0131ya dayan\u0131kl\u0131l\u0131k ve ge\u00e7irgenlik<\/h3>\n\n\n\n

      Saf silis, camla\u015fma s\u0131cakl\u0131\u011f\u0131na ula\u015f\u0131r: 1 700 \u00b0C<\/strong> \u2014 bu e\u015fik de\u011feri, bu malzemenin neden d\u00fcnya d\u00f6k\u00fcm end\u00fcstrisinde hakim konumda oldu\u011funu a\u00e7\u0131kl\u0131yor. Somut olarak, kum, d\u00f6k\u00fcm s\u0131cakl\u0131klar\u0131 nadiren 1 600 \u00b0C\u2019yi a\u015fan \u00e7elik veya s\u0131v\u0131 d\u00f6kme demirle temas etti\u011finde erimiyor.<\/p>\n\n\n\n

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      \"\"<\/figure>\n\n\n\n
      \"sable<\/figure>\n<\/figure>\n\n\n\n

      Ge\u00e7irgenlik ise \u00fcretilen par\u00e7alar\u0131n kalitesini do\u011frudan belirler. D\u00f6k\u00fcm s\u0131ras\u0131nda kal\u0131b\u0131n i\u00e7 k\u0131sm\u0131nda gazlar olu\u015fur. Bu gazlar zaman\u0131nda d\u0131\u015far\u0131 \u00e7\u0131kmazsa, gaz g\u00f6zeneklili\u011fi olarak adland\u0131r\u0131lan i\u00e7 kusurlara yol a\u00e7ar \u2014 bu bo\u015fluklar, nihai par\u00e7ay\u0131 k\u0131r\u0131lgan hale getirir.<\/p>\n\n\n\n

      \u00d6ncelikle, iri taneler gazlar\u0131n d\u0131\u015far\u0131 at\u0131lmas\u0131n\u0131 ve dolay\u0131s\u0131yla ge\u00e7irgenli\u011fi art\u0131r\u0131r. \u00d6te yandan, ince taneler y\u00fczey kalitesini iyile\u015ftirir, ancak ayn\u0131 ge\u00e7irgenli\u011fi azalt\u0131r. Bu nedenle, tane boyutu se\u00e7imi her zaman bir kal\u0131b\u0131n y\u00fczey kalitesi ile havaland\u0131rmas\u0131 aras\u0131nda bir uzla\u015fma<\/strong> :<\/p>\n\n\n\n

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      • Y\u00fcksek AFS endeksi<\/strong> : daha iyi y\u00fczey kalitesi, erken vitrifikasyon ve g\u00f6zeneklenme riskinde art\u0131\u015f<\/li>\n\n\n\n
      • D\u00fc\u015f\u00fck AFS endeksi<\/strong> : maksimum ge\u00e7irgenlik, par\u00e7a y\u00fczeyinin daha p\u00fcr\u00fczl\u00fc olmas\u0131<\/li>\n<\/ul>\n\n\n\n

        Bu kumla hangi metaller d\u00f6k\u00fclebilir?<\/h2>\n\n\n\n

        Al\u00fcminyum, bronz ve pirin\u00e7<\/h3>\n\n\n\n

        \u0130nce kum gerektirir (70 ila 90 AFS<\/strong>) p\u00fcr\u00fczs\u00fcz bir g\u00f6r\u00fcn\u00fcm elde etmek ve r\u00f6tu\u015flar\u0131 en aza indirmek i\u00e7in.<\/p>\n\n\n\n

        D\u00f6kme demir, \u00e7elik ve demir ala\u015f\u0131mlar\u0131<\/h3>\n\n\n\n

        A\u015f\u0131r\u0131 s\u0131cakl\u0131klara (1 550 \u00b0C\u2019ye kadar) dayanabilmesi i\u00e7in \u2019den fazla saf silis gerektirir. Daha iri taneli bir malzeme kullan\u0131l\u0131r (55 ila 65 AFS<\/strong>) metalin kal\u0131ba yap\u0131\u015fmas\u0131n\u0131 \u00f6nlemek i\u00e7in biraz k\u00f6m\u00fcr ekleyerek.<\/p>\n\n\n\n

        D\u00f6k\u00fcm kumu ne kadar?<\/h2>\n\n\n\n

        Fiyat, kumun safl\u0131\u011f\u0131na ve i\u015fleni\u015fine ba\u011fl\u0131d\u0131r:<\/p>\n\n\n\n

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        • D\u00f6kme (Sanayi):<\/strong> 'den Ton ba\u015f\u0131na 60 \u20ac ile 150 \u20ac aras\u0131nda<\/strong> ham silis i\u00e7in. \u015eunu hesaba kat\u0131n kg ba\u015f\u0131na 2 \u20ac ile 5 \u20ac aras\u0131<\/strong> kullan\u0131ma haz\u0131r teknik kum i\u00e7in.<\/li>\n\n\n\n
        • K\u00fc\u00e7\u00fck \u00f6l\u00e7ekli i\u015fletmeler (Zanaatkarlar \/ At\u00f6lyeler):<\/strong>\n
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          • 1 kg:<\/strong> 8 \u20ac ile 12 \u20ac aras\u0131 (tak\u0131lar veya denemeler i\u00e7in ideal).<\/li>\n\n\n\n
          • 5 kg:<\/strong> 20 \u20ac ile 30 \u20ac aras\u0131 (passe-partout format\u0131nda).<\/li>\n\n\n\n
          • 25 kg:<\/strong> 45 \u20ac ile 60 \u20ac aras\u0131 (ekonomik standart).<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n