{"id":53945,"date":"2006-11-07T00:00:00","date_gmt":"2006-11-07T00:00:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/purificacion-y-enriquecimiento-de-concentrados-de-cobre-por-transformacion-hidrotermal\/"},"modified":"2006-11-07T00:00:00","modified_gmt":"2006-11-07T00:00:00","slug":"purificacion-y-enriquecimiento-de-concentrados-de-cobre-por-transformacion-hidrotermal","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/barcelona\/purificacion-y-enriquecimiento-de-concentrados-de-cobre-por-transformacion-hidrotermal\/","title":{"rendered":"Purificaci\u00f3n y enriquecimiento de concentrados de cobre por transformaci\u00f3n hidrotermal"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Gerardo Fuentes C\u00e1ceres <\/strong><\/h2>\n<p>Se ha estudiado la transformaci\u00f3n hidrotermal de esfalerita (zns), bornita (cu5fes4), colecta (cuy) y pirita (fes2) con soluciones de cu2+ a 100-240\u00c2\u00bac y 1-35 atm. La reacci\u00f3n de la esfalerita a un ph entre 1,1-1,3 produce digenita (cu1,8s) entre 180-212\u00c2\u00bac y calcocita (cu2s) a 225\u00c2\u00bac. la reacci\u00f3n se verifica a trav\u00e9s de una capa compacta de sulfuro de cobre, que rodea a un n\u00facleo sin reaccionar. La velocidad de reacci\u00f3n sigue una ley parab\u00f3lica, siendo las constantes de velocidad inversamente proporcionales al cuadrado del radio inicial de las part\u00edculas.  la velocidad de reacci\u00f3n es independiente de la concentraci\u00f3n de cobre. La energ\u00eda de activaci\u00f3n es del orden 147 kj\/mol y el control cin\u00e9tico es por difusi\u00f3n i\u00f3nica en estado s\u00f3lido. La reacci\u00f3n de la bonita, a igual ph, produce digenita a mayor 160\u00c2\u00bac. A mayores temperaturas hay formaci\u00f3n de djurle\u00edta (cu1,94s). La velocidad de reacci\u00f3n sigue ley cin\u00e9tica de difusi\u00f3n en capa de productos. No hay efecto de la concentraci\u00f3n de cobre.  la energ\u00eda de activaci\u00f3n es del orden de 100kj\/mol y el control cin\u00e9tico es tambi\u00e9n por difusi\u00f3n i\u00f3nica en estado s\u00f3lido. La reacci\u00f3n de covellita al mismo ph, produce digenita a mayor 200\u00c2\u00bac. A mayores temperaturas y tiempos hay transformaci\u00f3n a calcocita (q y m) que se forman a expensas de la digenita. No se forma una capa continua ya que la reacci\u00f3n se produce por nucleaci\u00f3n irregular de la digenita y crecimiento zonal. La velocidad de reacci\u00f3n sigue una ley cin\u00e9tica de control qu\u00edmico. la velocidad de reacci\u00f3n es sensible a la concentraci\u00f3n de cu2+, con orden experimental de 0,6. La energ\u00eda de activaci\u00f3n del proceso es del orden de 110kj\/mol y el control cin\u00e9tico es de tipo electroqu\u00edmico. las reacciones de pirita, en el intervalo de 180-200\u00c2\u00bac produce mezclas de digenita y calcocita q. a temperaturas de 240\u00c2\u00bac y para concentraciones de c\u00faprico de 10 gpl se detecta un proceso de oxidaci\u00f3n del ferroso a f\u00e9rrico, produciendo por<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Purificaci\u00f3n y enriquecimiento de concentrados de cobre por transformaci\u00f3n hidrotermal<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Purificaci\u00f3n y enriquecimiento de concentrados de cobre por transformaci\u00f3n hidrotermal <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Gerardo Fuentes C\u00e1ceres <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Barcelona<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 11\/07\/2006<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3>Direcci\u00f3n y tribunal<\/h3>\n<ul>\n<li><strong>Director de la tesis<\/strong>\n<ul>\n<li>Juan Vi\u00f1als Oli\u00c1\u00a0<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal:  Sancho mart\u00ednez Jos\u00e9 pedro <\/li>\n<li>antoni Roca  vallmajor (vocal)<\/li>\n<li>Antonio Ballester perez (vocal)<\/li>\n<li>Manuel Viladevall sol\u00e9 (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Gerardo Fuentes C\u00e1ceres Se ha estudiado la transformaci\u00f3n hidrotermal de esfalerita (zns), bornita (cu5fes4), colecta (cuy) y [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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