在氧化铜矿Q选中酸铵对S2-消耗的影响-中国矿业114|?/title> <meta name="renderer" content="webkit|ie-comp|ie-stand" /> <meta name="keywords" content="氧化铜矿,酸?氧化,? /> <meta name="description" content="针对酸铵在氧化铜矿化选中的作用进行了研究。采用动态跟t的Ҏ量矿浆中S2-度的变化,初步探烦了硫酔R在氧化铜矿硫化Q选中对S2-消耗的影响。结果表明,在氧化铜矿硫化Q选中Q硫化钠除了zd氧化铜矿QŞ成硫化铜薄膜Q同时发生了复杂的氧化反应。该氧化q程与体pȝpH值存在密切的关系Q硫酔R在氧化铜矿硫化Q选过E中对矿物表面进行了清洗Q提高了矿物表面的活性,既促q了化q程的进行,也加快了S2-的氧化,q是酸铵促q氧化铜化选的重要原因? /> <meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=yes" /> <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1" /> <!-- medicom style --> <link rel="stylesheet" type="text/css" href="/resource/website/article/Content/css/flexslider.css" /> <link href="/resource/website/article/Content/css/style.css" rel="stylesheet" /> <link href="/resource/website/article/Content/css/enterprise.css" rel="stylesheet" /> <script src="/library/JavaScriptOpt.js"></script> <script src="/website_template/edition3/content/js/download.js"></script> <script src="/library/jquery/js/jquery-1.9.1.js"></script> <script src="/library/jquery/js/jquery-ui-1.10.3.custom.min.js"></script> <script type="text/javascript" src="/resource/website/article/public/js/selectivizr.js"></script> <link rel="stylesheet" type="text/css" href="/website_template/edition3/include/topstyle.css" /> <meta http-equiv="Cache-Control" content="no-transform" /> <meta http-equiv="Cache-Control" content="no-siteapp" /> </head> <body> <script type="text/javascript" src="/resource/website/article/public/js/IECompatible.js"></script> ?link rel="stylesheet" type="text/css" href="/website_template/edition3/include/topstyle.css" /> <!--<link rel="stylesheet" type="text/css" href="/website_template/edition3/index/css/style.css" />--> <div id="header"> <!--head--> <div class="colourfull-row"> <ul class="list-inline"> <li><a href="/">矿业114首页</a></li> <li>用户?</li> <li id="UserName_Input"> <input id="UserName_Value" type="text" name="name" /> </li> <li id="Password_Text">密码:</li> <li id="Password_Input"> <input id="Password_Value" type="password" name="password" /> </li> <li> <a id="LoginLogout_Button" href="javascript:loginlogout();">d</a> </li> <li> <a id="reg_btn" href="javascript:regbtnClick();">注册</a> </li> </ul> <div class="colourfull-row-right"> 客服电话:0555-2309838 2309819 2309829 </div> </div> <!-- d面 --> <div class="passport-login-pop" id='LM' style="display: none;"> <div class="login"> <div class="login-top"> <span>矿业114会员d</span> </div> <ul class="login-input" style="text-align: center;"> <li> <input id="winUserName" type="text" name="name" placeholder="用户? 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</div> <!-- D start --> <!-- 正文 --> <div class="mainbody"> <span id="SwfFileUrl" style="display: none;"></span> <div id="ShowSwfDiv" style="display: normal"> <object width="48" height="56" border="0" align="absmiddle" classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,29,0"> <param name="movie" value="http://ky114.cn/1.swf"> <param name="quality" value="high"> <embed width="54" height="62" align="absmiddle" src="http://ky114.cn/1.swf" quality="high" pluginspage="http://www.macromedia.com/go/getflashplayer" type="application/x-shockwave-flash"> <param name="wmode" value="opaque"> </object> <link rel="stylesheet" type="text/css" href="/library/FlexPaper/css/flexpaper.css" /> <script type="text/javascript" src="/library/FlexPaper/js/jquery.min.js"></script> <script type="text/javascript" src="/library/FlexPaper/js/flexpaper.js"></script> <div id="SwfDocumentViewer" class="flexpaper_viewer" style="position: relative; padding: 0px; width: 100%; height: 800px"></div> <script type="text/javascript"> $('#SwfDocumentViewer').FlexPaperViewer({ config: { SWFFile: '', Scale: 0.6, ZoomTransition: 'easeOut', ZoomTime: 0.5, ZoomInterval: 0.1, FitPageOnLoad: false, FitWidthOnLoad: true, FullScreenAsMaxWindow: false, ProgressiveLoading: false, MinZoomSize: 0.2, MaxZoomSize: 5, SearchMatchAll: true, InitViewMode: '', RenderingOrder: 'flash,html', StartAtPage: '', ViewModeToolsVisible: true, ZoomToolsVisible: true, NavToolsVisible: true, CursorToolsVisible: true, SearchToolsVisible: true, WMode: 'transparent', localeChain: 'en_US' } }); </script> </div> <script type="text/javascript"> var swfurl = document.getElementById("SwfFileUrl").innerHTML.toString().trim(); if (swfurl === "") { document.getElementById("ShowSwfDiv").innerHTML = ""; } </script> <div> <P style="TEXT-INDENT: 2em">化-黄药选法是指磨l的氧化铜矿加化剂进行硫化,然后d黄药cL收剂q行选。氧化铜矿处于硫化钠溶液中,吔R氢根离子和离子,吔Rq后,表面被一层硫化铜覆盖Q黄药在化q的氧化铜表面的吔RQ就像在化铜表面吸附一栗经化的氧化铜矿表面Ş成了一层硫化铜薄膜Q氧化铜矿物表面具有硫化铜矿物表面的性质Q再l黄药类捕收剂进行Q选。在该方法中Q硫化过E进行的好坏L关键的作用。其问题的关键是必须严格控制化剂的用量Q因为硫化剂既是氧化铜矿物的有效zd剂,又是化铜矿物或被硫化过的氧化铜矿物的抑制剂。但是在加入化钠的同时或者之前加入与化钠等量的酸铵可以消除过量硫化钠的抑制作用,q且已被工业实践证实?/P> <P style="TEXT-INDENT: 2em">本研I用动态跟t硫d电位q行q箋量Q研I硫酔RҎ化铜矿硫化Q选中S<SUP>2-</SUP>消耗情늚影响Q揭C硫酔R促进氧化铜矿化选的原因?/P> <P style="TEXT-INDENT: 2em"><STRONG>1   试验原料</STRONG></P> <P style="TEXT-INDENT: 2em">试验样品采用取自云南东川汤丹的氧化铜矿,铜含量ؓ56.5%。氧化铜矿物为孔雀石纯矿物Q富矿经q手选、瓷、挑U后使用。矿L细{分?200目粒U,再用蒔R水多ơ清z后作ؓ试验矿料Q试验用水均馏水Q药剂ؓ化钠(Na<SUB>2</SUB>S•9H<SUB>2</SUB>OQ和酸铵,且均为化学纯。试验中化钠和酸铉|度均?0<SUP>-2</SUP>mol/LQ溶液或者矿体U均?00ml?/P> <P style="TEXT-INDENT: 2em"><STRONG>2  试验原理</STRONG></P> <P style="TEXT-INDENT: 2em">试验采用电位型离子传感器Q采用硫d选择甉|q行动态跟t测量。离子选择性膜是所有电位型d传感器的核心lg。其原理是如果离子能够渗透过两相的界面,然后辑ֈ一个电化学qQ其中两相Ş成不同的电位Q如果仅有一U离子能够在两相中交换,那么两相间的电位差仅׃怸目标d的活度来军_。所以在此试验中Q硫d电位的高低代表了离子浓度的高低?/P> <P style="TEXT-INDENT: 2em"><STRONG>3   试验研究</STRONG> </P> <P style="TEXT-INDENT: 2em"><STRONG>3.1 pHg离子浓度的关系试验</STRONG></P> <P style="TEXT-INDENT: 2em">在分析天q上U取Na<SUB>2</SUB>S•9H<SUB>2</SUB>O 0.24gQ然后用蒔R水溶?00ml的容量瓶中,Ҏ化钠的水解q计算特定pHg的硫d度Q硫d度ҎQ已Ҏ离子浓度与电位的标定曲U将离子电位{换ؓ离子浓度,再将离子浓度{换ؓ离子浓度的ҎQ下同)与pH值的关系见图1?/P> <P style="TEXT-INDENT: 2em" align=center><IMG src="/Upload/EditFiles/20131211101721353.gif" width=388 height=214></P> <P style="TEXT-INDENT: 2em">? 离子浓度的Ҏ与pH值的关系</P> <P style="TEXT-INDENT: 2em">由图1可见QpH?0左右Ӟ离子浓度在10<SUP>-5</SUP> mol/L左右QpH?2左右Ӟ离子浓度在10<SUP>-3</SUP> mol/L左右?/P> <P style="TEXT-INDENT: 2em"><STRONG>2.1 化钠的自然氧化试验</STRONG></P> <P style="TEXT-INDENT: 2em">试验所用硫化钠为化学纯QNa<SUB>2</SUB>S·9H<SUB>2</SUB>OQ,是一U不E_的物质,在自然条件下Ҏ氧化成硫氧化物。首先进行了化钠的自然氧化试验Q在分析天^上称取Na<SUB>2</SUB>S•9H<SUB>2</SUB>O 0.24gQ然后溶?00ml的容量瓶中,该化钠溶液倒入烧杯中,搅拌q测量硫d度随时间的变化。硫d度Ҏ与时间的关系见图2?/P> <P style="TEXT-INDENT: 2em" align=center><IMG src="/Upload/EditFiles/20131211101721353.gif" width=416 height=243></P> <P style="TEXT-INDENT: 2em">? 离子浓度对C旉的关p?/P> <P style="TEXT-INDENT: 2em">由图2可知Q随着旉的推U,离子浓度的变化很小Q几乎不发生变化.说明该浓度下的硫化钠在空气中短时间内Qƈ且在不加M氧化剂的情况下,所发生的氧化反应比较缓慢?/P> <P style="TEXT-INDENT: 2em"><STRONG>2.2 孔雀?化钠体p试?/STRONG></P> <P style="TEXT-INDENT: 2em">在分析天q上U取1g孔雀矛_入烧杯中,然后U取Na<SUB>2</SUB>S•9H<SUB>2</SUB>O 0.24gQ然后溶?00ml的容量瓶中,该化钠溶液倒入装有孔雀石的烧杯中,搅拌q测定硫d度随时间的变化情况。孔雀?化钠体pM离子浓度随旉的变化曲U见??/P> <P style="TEXT-INDENT: 2em" align=center><IMG src="/Upload/EditFiles/20131211101721409.gif" width=437 height=232></P> <P style="TEXT-INDENT: 2em">? 离子浓度的Ҏ与时间的关系</P> <P style="TEXT-INDENT: 2em">由图3可知Q硫化钠中加?g孔雀矛_Q硫d的消耗速度明显加快Q?0min后硫d度已经?0<SUP>-3</SUP>mol/L降到?0<SUP>-7</SUP> mol/LQ硫d基本上消耗殆,但是此时量体系的pH值时发现QpHg然在12以上Q由此可见,离子的消耗不是单U的用于化孔雀矻I在孔雀矌面生成了化铜薄膜,而应该是发生了更复杂的反应,因ؓ离子生成硫化铜化孔雀石的反应会造成体系pH值的下降Q硫化钠中的已l是负二价了Q硫d能发生的反应只有氧化反应Q所以在此过E中发生了氧化反应,而且是有氢离子参与的氧化反应Q只有该反应吸收氢离子才会导致体pȝpH值居高不下?/P> <P style="TEXT-INDENT: 2em"><STRONG><FONT style="COLOR: #003366"><A href="http://www.zssxnt.live/show.asp?id=52305" target=_blank>览《在氧化铜矿选中酸铵对S2-消耗的影响》全?/A></FONT></STRONG></P> </div> </div> <div class='content-keyword'><span style='color: red'>标签:  </span><a target='_blank' href='/website/article/1117/index.html?tp=0&tl=&ah=&un=&nt=&kw=%u6C27%u5316%u94DC%u77FF%2C%u786B%u9178%u94F5%2C%u6C27%u5316%2C%u6D6E%u9009&pg=1&sc=Article&ti=2AA0FC1963F7438E96508DA8ECE712CC&tc=&si=4F7AFBED28F54C8CA75B3AD068C46E25' style='color: black'>氧化铜矿,酸?氧化,?/a> </div> </div> <!--<div class="file-box"> <ul class="list-unstyled"> <li>中矿传媒与您共徏矿业文分nq_</li> <li> <a href="javascript:onDownload();"> AhutCMS:DownloadImg </a> </li> </ul> </div>--> <iframe scrolling="no" frameborder="0" style="width: 800px; height: 800px; border-style: none; border: 0px solid #fff;" src="/website/include/F544EA586D024B5B8F417453E204DF2D.html"></iframe> </div> <!-- 侧栏 start --> <iframe id="iframepage" scrolling="no" frameborder="0" style="float: right; margin-left: 27px; width: 223px; height: 1720px; border-style: none; border: 0px solid #fff;" src="/website/include/B634F0B5746E4E8488B44D3C02527526.html"></iframe> </div> ?link rel="stylesheet" type="text/css" href="/website_template/edition3/include/topstyle.css" /> <div class="aboutUs"> <div class="container"> <center> <ul> <li><a target="_blank" href="/website/article/1810/index.html">关于我们</a></li> <li><a >|</a></li> <li><a target="_blank" href="/website/article/1811/index.html">矿业技术服务^?/a></li> <li><a >|</a></li> <li><a target="_blank" href="/website/article/1812/index.html">会员服务</a></li> <li><a >|</a></li> <li><a>|站地图</a></li> <li><a >|</a></li> <li><a target="_blank" href="/website/article/1814/index.html">q告服务</a></li> <li><a >|</a></li> <li><a target="_blank" href="/website/article/1832/index.html">商务合作</a></li> <li><a >|</a></li> <li><a target="_blank" href="/website/article/1816/index.html">联系我们</a></li> <li><a >|</a></li> <li><a target="_blank" href="/website/article/1817/index.html">友情链接</a></li> </ul> </center> </div> </div> <section style="width: 100%; height: 120px; text-align: center; line-height: 24px; font-size: 12px;"> <ul class="list-unstyled"> <li>旗下q_:《金属矿山》杂志社 《现代矿业》杂志社 中矿人才|?/li> <li>Copyright 2005-2015版权所有:矿业114|站 商务合作/意见Q?555-2309838 24时服务热线:13955598297 <a href=" http://wpa.qq.com/msgrd?v=3&uin=249432467&site=qq&menu=yes" rel="nofollow" target="_blank"> <img src="/images/QQ.gif" alt="点击q里l我发消? 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