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Main Author:	Héctor Alirio Pérez Rodríguez
Format:	Artículo científico
Language:	es
Published:	Universidad Tecnológica de Pereira 2007
Subjects:	Ingeniería Fase Escoria Pseudobinario Diagrama Ternario Mineral Laterítico
Online Access:	https://www.redalyc.org/articulo.oa?id=84903698
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Estudio de las fases predominantes y caracterización de las escorias del proceso de obtención de ferro níquel Héctor Alirio Pérez Rodríguez Fabio Raúl Pérez Villamil Ingeniería Fase Escoria Pseudobinario Diagrama Ternario Mineral Laterítico En el procesamiento de mineral laterítico de Níquel el proceso de fusión se realiza en unHorno de Arco Eléctrico, de donde se obtienen dos productos: metal y escoria. La escoriaes del orden de 16 veces la cantidad de Metal, lo que equivale a 3.800 toneladas diarias.La operación de este reactor depende de las propiedades de la escoria, en especial sutemperatura de fusión. La escoria contiene principalmente 4 especies, MgO-SiO2-Al2O3-FeO (MSAF). Muestras típicas de escoria se caracterizan, y se ubican en el diagramacuaternario y a partir de este se obtiene un pseudobinario, con las regiones de estabilidadde los diferentes componentes y con las fases predominantes. 2007 artículo científico 0122-1701 https://www.redalyc.org/articulo.oa?id=84903698 es http://www.redalyc.org/revista.oa?id=849 Scientia Et Technica application/pdf Universidad Tecnológica de Pereira Scientia Et Technica (Colombia) Num.36 Vol.XIII

if (filemtime($filename) + $maxlifetime < time()) { unlink($filename); $count++; } } return $count; } /** * A function that is called internally when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ protected function saveSession($sessId, $data): bool { $sessFile = $this->path . '/sess_' . $sessId; if ($handle = fopen($sessFile, 'w')) { $return = false; // Lock the file for exclusive access to avoid issues with multiple // processes writing session simultaneously: if (flock($handle, LOCK_EX)) { $return = fwrite($handle, $data); // Make sure that there's no trailing data by truncating the file to // the correct length: ftruncate($handle, strlen($data)); fflush($handle); flock($handle, LOCK_UN); } fclose($handle); if ($return !== false) { return true; } } // If we got this far, something went wrong with the file output... // It is tempting to throw an exception here, but this code is called // outside of the context of exception handling, so all we can do is // echo a message.

// Anecdotal testing Today and Yesterday seems to indicate destroy() // is called by the garbage collector and everything is good. // Something to keep in mind though. return 0; } /** * Write function that is called when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ public function write($sessId, $data): bool { if ($this->writesDisabled) { return true; } return $this->saveSession($sessId, $data); } /** * A function that is called internally when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ abstract protected function saveSession($sessId, $data): bool; }

* * @return void */ public function writeClose() { // The assumption is that we're using PHP's ext/session. // session_write_close() will actually overwrite $_SESSION with an // empty array on completion -- which leads to a mismatch between what // is in the storage object and $_SESSION. To get around this, we // temporarily reset $_SESSION to an array, and then re-link it to // the storage object. // // Additionally, while you _can_ write to $_SESSION following a // session_write_close() operation, no changes made to it will be // flushed to the session handler. As such, we now mark the storage // object isImmutable. $storage = $this->getStorage(); if (! $storage->isImmutable()) { $_SESSION = $storage->toArray(true); session_write_close(); $storage->fromArray($_SESSION); $storage->markImmutable(); } } /** * Attempt to set the session name * * If the session has already been started, or if the name provided fails * validation, an exception will be raised. * * @param string $name * @return SessionManager * @throws Exception\InvalidArgumentException */ public function setName($name) { if ($this->sessionExists()) { throw new Exception\InvalidArgumentException( 'Cannot set session name after a session has already started'

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