Electrochemical sulfidizing of refractory oxidized copper ores

Electrochemical sulfidizing of refractory oxidized copper ores | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Research Article Electrochemical sulfidizing of refractory oxidized copper ores Murat Dospayev, Irina Figurinene, Anel Jashibekova, Darkhan Dospayev This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-8769039/v1 This work is licensed under a CC BY 4.0 License Status: Posted Version 1 posted You are reading this latest preprint version Abstract The aim of the research is the use of electrochemical sulfidizing to increase the degree of copper recovery from refractory oxidized copper ore, in which malachite is the main mineral. The object of research is oxidized copper ore of the Zhezkazgan deposit in the Republic of Kazakhstan that contains 0.70 wt.% of total copper, 0.64 wt.% of which is oxidized minerals. The electrode mechanisms of cathodic reduction of the malachite mineral and the chemical reaction of elemental colloidal-dispersed sulfur formation from sodium thiosulfate established by the voltammetry method were used for preliminary electrochemical sulfidizing of oxidized copper ore for flotation. Electrochemical sulfidizing was carried out by electrolysis under galvanostatic conditions. The results of electrolytic sulfidizing of oxidized copper ore and conversion of refractory minerals into an easily floatable sulfide form are presented. A multifactor model of copper recovery was obtained, according to which a specified high degree of recovery of ≥ 96.0% can be achieved with current densities of 50–150 A m − 2 with the addition of sodium thiosulfate sulfidizer of 2–3 g L − 1 , the sulfuric acid concentration of 20–24 g L − 1 and the electrolysis duration of 60 minutes. The kinetic parameters of the process were studied, and the diffusion mode of sulfidizing was established. Under optimal conditions of electrochemical sulfidizing of oxidized copper ore, the degree of copper recovery into concentrate reaches 96.5%, which exceeds the indicators of direct flotation by 30%. oxidized copper ore mineral malachite sodium thiosulfate voltammetry microelectrolysis at a controlled potential electrochemical sulfidizing copper recovery flotation sulfide copper concentrate Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Posted Version 1 posted You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. Our growing team is made up of researchers and industry professionals working together to solve the most critical problems facing scientific publishing. Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-8769039","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":616047960,"identity":"d14d87df-6b21-46a5-8cba-5bb5bf386210","order_by":0,"name":"Murat Dospayev","email":"","orcid":"","institution":"Zh. 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The object of research is oxidized copper ore of the Zhezkazgan deposit in the Republic of Kazakhstan that contains 0.70 wt.% of total copper, 0.64 wt.% of which is oxidized minerals. The electrode mechanisms of cathodic reduction of the malachite mineral and the chemical reaction of elemental colloidal-dispersed sulfur formation from sodium thiosulfate established by the voltammetry method were used for preliminary electrochemical sulfidizing of oxidized copper ore for flotation. Electrochemical sulfidizing was carried out by electrolysis under galvanostatic conditions. The results of electrolytic sulfidizing of oxidized copper ore and conversion of refractory minerals into an easily floatable sulfide form are presented. A multifactor model of copper recovery was obtained, according to which a specified high degree of recovery of \u0026ge; 96.0% can be achieved with current densities of 50\u0026ndash;150 A m\u003csup\u003e\u0026minus;\u0026thinsp;2\u003c/sup\u003e with the addition of sodium thiosulfate sulfidizer of 2\u0026ndash;3 g L\u003csup\u003e\u0026minus;\u0026thinsp;1\u003c/sup\u003e, the sulfuric acid concentration of 20\u0026ndash;24 g L\u003csup\u003e\u0026minus;\u0026thinsp;1\u003c/sup\u003e and the electrolysis duration of 60 minutes. The kinetic parameters of the process were studied, and the diffusion mode of sulfidizing was established. Under optimal conditions of electrochemical sulfidizing of oxidized copper ore, the degree of copper recovery into concentrate reaches 96.5%, which exceeds the indicators of direct flotation by 30%.\u003c/p\u003e","manuscriptTitle":"Electrochemical sulfidizing of refractory oxidized copper ores","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2026-04-02 15:13:35","doi":"10.21203/rs.3.rs-8769039/v1","editorialEvents":[{"type":"communityComments","content":0}],"status":"published","journal":{"display":true,"email":"[email protected]","identity":"researchsquare","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":true,"externalIdentity":"","sideBox":"","snPcode":"","submissionUrl":"/submission","title":"Research Square","twitterHandle":"researchsquare","acdcEnabled":true,"dfaEnabled":false,"editorialSystem":"","reportingPortfolio":"","inReviewEnabled":false,"inReviewRevisionsEnabled":true}}],"origin":"","ownerIdentity":"6a9cff14-1226-47bb-b3ce-fce287691e28","owner":[],"postedDate":"April 2nd, 2026","published":true,"recentEditorialEvents":[],"rejectedJournal":[],"revision":"","amendment":"","status":"posted","subjectAreas":[],"tags":[],"updatedAt":"2026-04-23T03:09:59+00:00","versionOfRecord":[],"versionCreatedAt":"2026-04-02 15:13:35","video":"","vorDoi":"","vorDoiUrl":"","workflowStages":[]},"version":"v1","identity":"rs-8769039","journalConfig":"researchsquare"},"__N_SSP":true},"page":"/article/[identity]/[[...version]]","query":{"redirect":"/article/rs-8769039","identity":"rs-8769039","version":["v1"]},"buildId":"XKTyCvWXoU3ODBz1xrDgd","isFallback":false,"isExperimentalCompile":false,"dynamicIds":[84888],"gssp":true,"scriptLoader":[]}