<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>2602-8484</journal-id>
<journal-title><![CDATA[FIGEMPA: Investigación y Desarrollo]]></journal-title>
<abbrev-journal-title><![CDATA[Figempa]]></abbrev-journal-title>
<issn>2602-8484</issn>
<publisher>
<publisher-name><![CDATA[Universidad Central de Ecuador ]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2602-84842016000200073</article-id>
<article-id pub-id-type="doi">10.29166/revfig.v1i2.890</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Cinética para recuperación de zinc de cenizas de galvanizado con ácido clorhídrico]]></article-title>
<article-title xml:lang=""><![CDATA[Kinetics for recovery of zinc from ashes of galvanized with hydrochloric acid]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Calle]]></surname>
<given-names><![CDATA[Mario]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Benítez Cortés]]></surname>
<given-names><![CDATA[Isnel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pérez Martínez]]></surname>
<given-names><![CDATA[Amaury]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Central de Ecuador. Quito  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Ecuador</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de Camagüey, Cuba.  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Cuba</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad de Camagüey, Cuba.  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Cuba</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2016</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2016</year>
</pub-date>
<volume>2</volume>
<numero>2</numero>
<fpage>73</fpage>
<lpage>76</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.senescyt.gob.ec/scielo.php?script=sci_arttext&amp;pid=S2602-84842016000200073&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.senescyt.gob.ec/scielo.php?script=sci_abstract&amp;pid=S2602-84842016000200073&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.senescyt.gob.ec/scielo.php?script=sci_pdf&amp;pid=S2602-84842016000200073&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen La extracción del zinc que contienen las cenizas de galvanizado en caliente se realizó usando ácido clorhídrico. La composición de las cenizas fue determinada por difracción de rayos x, obteniéndose zinc metálico, oxido y el hidróxido, siendo el mayor componente el óxido (49%). Las cenizas son sólidos granulares de forma irregular, las partículas con un diámetro promedio mayor dieron las mayores tasas de velocidad. Las representaciones gráficas del modelo del núcleo que se encoje sin reaccionar controlado por la reacción química dieron una buena linealidad. Así mismo, se demostró que la velocidad de lixiviación no depende de la agitación, y la energía de activación estimada dio un valor de 18,4 kj/mol. La velocidad de la reacción puede ser determinada mediante la siguiente ecuación semiempírica: ]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The leaching of zinc from galvanic ashes was carried out using hydrochloric acid. Ashes composition includes metal zinc, oxide and hydroxide according to the X-rays diffractrometry, being the greater component the oxide (49%). The ashes are powders of irregular shape. Powders with smaller mean diameter gave the higher rates. The plots of the shrinking core model controlled by the chemical reaction gave good linearity. Also the leaching rate did not depend on stirring and the estimated activation energy gave a value of 18,4 kJ/mol. All these facts are fully discussed. The rate of the reaction based on shrinking core model can be expressed by a semi-empirical equation as: ]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[cinética]]></kwd>
<kwd lng="es"><![CDATA[extracción]]></kwd>
<kwd lng="es"><![CDATA[reacción heterogénea]]></kwd>
<kwd lng="es"><![CDATA[ácido]]></kwd>
<kwd lng="es"><![CDATA[cenizas de zinc]]></kwd>
<kwd lng="en"><![CDATA[kinetics]]></kwd>
<kwd lng="en"><![CDATA[extraction]]></kwd>
<kwd lng="en"><![CDATA[heterogeneous reaction]]></kwd>
<kwd lng="en"><![CDATA[zinc ash]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Hydrometallurgical treatment of zinc silicate ore from Thailand,]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bodas]]></surname>
<given-names><![CDATA[M.G.]]></given-names>
</name>
</person-group>
<source><![CDATA[Hydrometallurgy]]></source>
<year>1996</year>
<volume>40</volume>
<numero>1-2</numero>
<issue>1-2</issue>
<page-range>37-49</page-range></nlm-citation>
</ref>
<ref id="B2">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Kinetics of hydrochloric acid leaching of smithsonite]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Dhawan]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
</person-group>
<source><![CDATA[Russian Journal of Non-Ferrous Metals]]></source>
<year>2011</year>
<volume>52</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>209-16</page-range></nlm-citation>
</ref>
<ref id="B3">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Pelletizing and alkaline leaching of powdery low grade zinc oxide ores]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Feng]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
</person-group>
<source><![CDATA[Hydrometallurgy]]></source>
<year>2007</year>
<volume>89</volume>
<numero>3&#8211;4</numero>
<issue>3&#8211;4</issue>
<page-range>305-10</page-range></nlm-citation>
</ref>
<ref id="B4">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Pressure leaching of high silica Pb&#8211;Zn oxide ore in sulfuric acid medium.]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[He]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
</person-group>
<source><![CDATA[Hydrometallurgy]]></source>
<year>2010</year>
<volume>104</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>235-40</page-range></nlm-citation>
</ref>
<ref id="B5">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Kinetic Analysis of Isothermal Leaching of Zinc from Zinc Plant. Residue.]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Hollagh]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<source><![CDATA[International Journal of Nonferrous Metallurgy]]></source>
<year>2013</year>
<volume>2</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>10-20</page-range></nlm-citation>
</ref>
<ref id="B6">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Selective leaching of zinc from zinc ferrite with hydrochloric acid]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Langová]]></surname>
<given-names><![CDATA[&#352;.]]></given-names>
</name>
</person-group>
<source><![CDATA[Hydrometallurgy]]></source>
<year>2009</year>
<volume>95</volume>
<numero>3&#8211;4</numero>
<issue>3&#8211;4</issue>
<page-range>179-82</page-range></nlm-citation>
</ref>
<ref id="B7">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Levenspiel]]></surname>
<given-names><![CDATA[O.]]></given-names>
</name>
</person-group>
<source><![CDATA[Ingeniería de las reacciones químicas]]></source>
<year>2004</year>
<edition>3ra. Edición</edition>
<publisher-loc><![CDATA[México ]]></publisher-loc>
</nlm-citation>
</ref>
<ref id="B8">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Leaching and selective zinc recovery from acidic leachates of zinc metallurgical leach residues.]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Sethurajan]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<source><![CDATA[Journal of Hazardous Materials.]]></source>
<year>2016</year>
</nlm-citation>
</ref>
<ref id="B9">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Kinetics of sulphuric acid leaching of a zinc silicate calcine]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Souza]]></surname>
<given-names><![CDATA[A.D.]]></given-names>
</name>
</person-group>
<source><![CDATA[Hydrometallurgy]]></source>
<year>2007</year>
<volume>89</volume>
<numero>3&#8211;4</numero>
<issue>3&#8211;4</issue>
<page-range>337-45</page-range></nlm-citation>
</ref>
<ref id="B10">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Sulfuric acid leaching of zinc silicate ore under pressure]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Xu]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
</person-group>
<source><![CDATA[Hydrometallurgy]]></source>
<year>2010</year>
<volume>105</volume>
<numero>1&#8211;2</numero>
<issue>1&#8211;2</issue>
<page-range>186-90</page-range></nlm-citation>
</ref>
<ref id="B11">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Leaching of zinc oxide in acidic solution]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Yoshida]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
</person-group>
<source><![CDATA[Materials Transactions.]]></source>
<year>2003</year>
<volume>44</volume>
<numero>12</numero>
<issue>12</issue>
<page-range>2489-93</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
