{"id":652,"date":"2018-02-13T10:29:37","date_gmt":"2018-02-13T09:29:37","guid":{"rendered":"http:\/\/naf.se\/?page_id=652"},"modified":"2018-06-07T14:19:11","modified_gmt":"2018-06-07T12:19:11","slug":"vitlutsframstallning","status":"publish","type":"page","link":"https:\/\/nafse24.hamlet2.hamrenmedia.se\/sv\/applikationer\/kemisk-massaframstallning\/kemikalieatervinning\/vitlutsframstallning\/","title":{"rendered":"Vitlutframst\u00e4llning"},"content":{"rendered":"<p><div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-1 nonhundred-percent-fullwidth non-hundred-percent-height-scrolling\" style=\"--awb-border-radius-top-left:0px;--awb-border-radius-top-right:0px;--awb-border-radius-bottom-right:0px;--awb-border-radius-bottom-left:0px;--awb-flex-wrap:wrap;\" ><div class=\"fusion-builder-row fusion-row\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-0 fusion_builder_column_1_1 1_1 fusion-one-full fusion-column-first fusion-column-last\" style=\"--awb-bg-size:cover;\"><div class=\"fusion-column-wrapper fusion-flex-column-wrapper-legacy\"><div class=\"fusion-title title fusion-title-1 fusion-sep-none fusion-title-text fusion-title-size-one\"><h1 class=\"fusion-title-heading title-heading-left\" style=\"margin:0;\">Vitlutframst\u00e4llning<\/h1><\/div><div class=\"fusion-text fusion-text-1\"><pre>Vitlutframst\u00e4llning \u00e4r den sista delen av \u00e5tervinningsprocessen - den kallas <b>kaustiseringsprocessen<\/b>. H\u00e4r omvandlas natriumkarbonatet i gr\u00f6nluten till natriumhydroxid (NaOH) genom reduktion med br\u00e4nt kalk (CaO).<\/pre>\n<\/div><div class=\"fusion-clearfix\"><\/div><\/div><\/div><\/div><\/div><div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-2 nonhundred-percent-fullwidth non-hundred-percent-height-scrolling\" style=\"--awb-border-radius-top-left:0px;--awb-border-radius-top-right:0px;--awb-border-radius-bottom-right:0px;--awb-border-radius-bottom-left:0px;--awb-flex-wrap:wrap;\" ><div class=\"fusion-builder-row fusion-row\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-1 fusion_builder_column_1_2 1_2 fusion-one-half fusion-column-first\" style=\"--awb-bg-size:cover;width:50%;width:calc(50% - ( ( 4% ) * 0.5 ) );margin-right: 4%;\"><div class=\"fusion-column-wrapper fusion-flex-column-wrapper-legacy\"><div class=\"fusion-text fusion-text-2\"><p>Samtidigt bildas s.k. mesa (kalciumkarbonat CaCO3) som separeras och tv\u00e4ttas, filtratet \u00e4r s.k. svaglut. Vi har nu ny kokv\u00e4tska som kallas <b>vitlut<\/b> (\u00e4ven om den faktiskt \u00e4r n\u00e5got gul). Den tv\u00e4ttade mesan br\u00e4nns i en mesaugn vid h\u00f6g temperatur f\u00f6r att producera br\u00e4nd kalk igen.<\/p>\n<p>Mesaugnen drivs ibland med olja, men oftare med tr\u00e4rester. Dessa rester torkas f\u00f6rst och pulveriseras eller avgasas innan de matas in i ugnen. Mesaugnen \u00e4r en stor horisontell st\u00e5lcylinder med en diameter p\u00e5 2-4 meter och en l\u00e4ngd p\u00e5 40-120 meter. Cylindern roterar vid 1-3 varv per minut med en lutning p\u00e5 2-30\u00b0 mot br\u00e4nnaren.<\/p>\n<p>N\u00e5gra av de sv\u00e5raste applikationerna f\u00f6r ventiler i ett massabruk finns i vitlutframst\u00e4llningen. Gr\u00f6nluten \u00e4r mycket erosiv och har en stark tendens att kristallisera och skapa bel\u00e4ggningar p\u00e5 alla fuktiga ytor p\u00e5 en ventil. En annan sv\u00e5r och mycket erosiv applikation \u00e4r reglering av mesaslammet in till mesaugnen.<\/p>\n<\/div><div class=\"fusion-clearfix\"><\/div><\/div><\/div><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-2 fusion_builder_column_1_2 1_2 fusion-one-half fusion-column-last\" style=\"--awb-bg-size:cover;width:50%;width:calc(50% - ( ( 4% ) * 0.5 ) );\"><div class=\"fusion-column-wrapper fusion-flex-column-wrapper-legacy\"><a class=\"awb-lightbox awb-lightbox-1\" href=\"https:\/\/nafse24.hamlet2.hamrenmedia.se\/wp-content\/uploads\/2018\/05\/Vitlutspreparering-1-1024x675.jpg\" data-rel=\"iLightbox\"><img src=\"https:\/\/nafse24.hamlet2.hamrenmedia.se\/wp-content\/uploads\/2018\/05\/Vitlutspreparering-1-1024x675.jpg\"><\/a><div class=\"fusion-text fusion-text-3\"><p style=\"text-align: right;\"><em>Tryck f\u00f6r st\u00f6rre bild.<\/em><\/p>\n<\/div><div class=\"fusion-clearfix\"><\/div><\/div><\/div><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-3 fusion_builder_column_1_1 1_1 fusion-one-full fusion-column-first fusion-column-last\" style=\"--awb-bg-size:cover;\"><div class=\"fusion-column-wrapper fusion-flex-column-wrapper-legacy\"><div class=\"fusion-title title fusion-title-2 fusion-sep-none fusion-title-text fusion-title-size-two\"><h2 class=\"fusion-title-heading title-heading-left\" style=\"margin:0;\">Exempel p\u00e5 NAF-ventiler som anv\u00e4nds i denna process<\/h2><\/div><div class=\"fusion-text fusion-text-4\"><ul>\n<li><b>NAF <\/b><b>Duball<\/b><b> DL <\/b>fullopps kulventil- oklarnad gr\u00f6nlut, klarnad gr\u00f6nlut, vitlut, kalkslam, myrsyra, metanol, br\u00e4nnolja till mesaugn, naturgas till mesaugn, brandvatten<\/li>\n<li><b>NAF <\/b><b>Duball<\/b><b> DL <\/b><b>Keramventil<\/b> f\u00f6r reglering- reglering av mesa<\/li>\n<li><b>NAF <\/b><b>Setball<\/b> V-ports kulsektorventil f\u00f6r reglering- Kylvatten, kemikaliebehandlat varm vatten, reglering av l\u00e5gtrycks\u00e5nga, reglering av metanol, reglering av br\u00e4nnolja till mesaugn<\/li>\n<li><b>NAF <\/b><b>Trunnball<\/b><b> DL <\/b>fullopps lagrad kulventil- reglering av l\u00e5gtrycks\u00e5nga<\/li>\n<li><b>NAF <\/b><b>Turnex<\/b> pneumatisk man\u00f6verdon- f\u00f6r all anv\u00e4ndning p\u00e5 NAFs vridande on\/off- och regler-ventiler<\/li>\n<\/ul>\n<\/div><div class=\"fusion-clearfix\"><\/div><\/div><\/div><\/div><\/div><\/p>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":2079,"parent":535,"menu_order":10,"comment_status":"closed","ping_status":"closed","template":"templates\/undersidor.php","meta":{"footnotes":""},"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Vitlutframst\u00e4llning | NAF Control Valves<\/title>\n<meta name=\"description\" content=\"Vitlutframst\u00e4llning \u00e4r den sista delen av \u00e5tervinningsprocessen - det kallas kaustiseringsprocessen. 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