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class="xypg-left-box xypg-left-contact"> <div class="xypg-left-title"> <h3>聯系我們<span>Contact Us</span></h3> </div> <div class="xypg-left-con"> <div class="page-wrap-contact"> <h4>南昌天高環?？萍脊煞萦邢薰?/h4> <p>電話：17770087478-鄭經理</p><p>傳真：0791-86690255</p><p>網址：江西省南昌市昌北經濟技術開發區天高工業園</p><p><br/></p> </div> </div> </div> </div> </div> <div class="page-wrap-right"> <div class="xypg-right-content">  <div class="news_detail"> <h1 class="title">土工膜在尾礦處理中的作用</h1> <div class="info_title clearfix"> <h3 class="title_bar"> 發布日期：<span>2018-10-23</span> 作者：<span></span> 點擊：<span><script src="http://www.permaculturegreenhouse.com/data/include/newshits.php?id=460"></script></span> </h3> <div class="share">  <div class="bdsharebuttonbox"> <a href="#" class="bds_more" data-cmd="more"></a> <a href="#" class="bds_qzone" data-cmd="qzone"></a> <a href="#" class="bds_tsina" data-cmd="tsina"></a> <a href="#" class="bds_tqq" data-cmd="tqq"></a> <a href="#" class="bds_renren" data-cmd="renren"></a> <a href="#" class="bds_weixin" data-cmd="weixin"></a> </div> <script> window._bd_share_config={"common":{"bdSnsKey":{},"bdText":"","bdMini":"2","bdPic":"","bdStyle":"0","bdSize":"16"},"share":{},"image":{"viewList":["qzone","tsina","tqq","renren","weixin"],"viewText":"分享到：","viewSize":"16"},"selectShare":{"bdContainerClass":null,"bdSelectMiniList":["qzone","tsina","tqq","renren","weixin"]}};with(document)0[(getElementsByTagName('head')[0]||body).appendChild(createElement('script')).src='http://bdimg.share.baidu.com/static/api/js/share.js?v=89860593.js?cdnversion='+~(-new Date()/36e5)]; </script>  </div> </div> <div class="content"><p style="text-indent: 2em;"><span style="font-size: 16px;">隨著經濟的發展，對礦產品需求大幅度增加，礦業開發規模隨之加大，產生的選礦尾礦數量將不斷增加；加之許多可利用的金屬礦品位日益降低，為了滿足礦產品日益增長的需求，選礦規模越來越大，因此產生的選礦尾礦數量也將大量增加，而大量堆存的尾礦，給礦業、環境及經濟等造成不少難題。</span></p><p style="text-indent: 2em;"><span style="font-size: 16px;">1、礦產資源費嚴重。由于尾礦中不僅含有可再選的金屬礦和非金屬礦等有用組分，而且就是不可再選的Z終尾礦也有不少用途，因此浪費于尾礦中的有用組分數量是相當可觀的。</span></p><p style="text-indent: 2em;"><span style="font-size: 16px;">2、堆存尾礦占用大量土地、堆存投資巨大。國內外對于尾礦的處理，不論尾礦中有用礦物是否有回收價值，大都是在地面予以堆存。尾礦的堆存不僅占用了大量的耕地，還容易造成礦區環境污染、水土流失、植被破壞等。</span></p><p style="text-indent: 2em;"><span style="font-size: 16px;">3、尾礦對自然生態環境的影響。尾礦對自然生態環境的影響具體表現在：</span></p><p style="text-indent: 2em;"><span style="font-size: 16px;">3.1、尾礦堆存時易流動和塌漏，造成植被破壞和傷人事故，尤其在雨季極易引起塌陷和滑坡。尾礦庫壩體較高，存在不安全隱患。</span></p><p style="text-indent: 2em;"><span style="font-size: 16px;">3.2、尾礦成分及殘留選礦藥劑對生態環境的破壞嚴重，尤其是含重金屬的尾礦，其中硫化物產生酸性水進一步淋浸重金屬，其流失將對整個生態環境造成危害。</span></p><p style="text-indent: 2em;"><span style="font-size: 16px;">目前，對尾礦的處理方法一般是作為礦山地下開采采空區的充填料，即水砂充填料或膠結充填的集料；或者有的直接在尾礦堆積場上覆土造田，種植農作物或植樹造林。其實尾礦Z具經濟效益的處理方法還是尾礦制砂和作為建筑材料的原料，例如經過處理的尾礦可以作為水泥、瓦、加氣混凝土、透水磚、耐火材料、防火保溫材料、玻璃、陶粒、混凝土集料等的原料，尾礦砂可以替代一部分的機制砂用來制作混凝土、修筑公路、路面材料等。</span></p><p style="text-indent: 2em;"><span style="font-size: 16px;">當尾礦中含有毒性物質或放射性物質或重金屬離子時，原則上不允許含有害物質污染地下水，因此要做放滲處理。</span></p><p style="text-indent: 2em;"><span style="font-size: 16px;">土工膜以塑料薄膜作為防滲基材，與無紡布復合而成的土工防滲材料，它的防滲性能主要取決于塑料薄膜的防滲性能。土工膜是一種以高分子聚合物為基本原料的防水阻隔型材料。主要分為：低密度聚乙烯（LDPE）土工膜、高密度聚乙烯（HDPE）土工膜和EVA土工膜。</span></p><p style="text-indent: 2em;"><span style="font-size: 16px;"><img src="/data/upload/image/20181023/1540257216414813.png" title="1540257216414813.png" alt="大寶山礦業3.png"/></span></p><p style="text-indent: 2em;"><span style="font-size: 16px;">目前，國內外防滲應用的塑料薄膜，主要有聚氯乙烯（PVC）和聚乙烯（PE）、EVA（乙烯/醋酸乙烯共聚物），隧道應用中還有設計使用ECB（乙烯乙酸乙烯改性瀝青共混土工膜）的，它們是一種高分子化學柔性材料，比重較小，延伸性較強，適應變形能力高，耐腐蝕，耐低溫，抗凍性能好。</span></p><p style="text-indent: 2em;"><span style="font-size: 16px;"><img src="/data/upload/image/20181023/1540257234974918.png" title="1540257234974918.png" alt="大寶山礦業1.png"/></span></p><p style="text-indent: 2em;"><span style="font-size: 16px;">其主要機理是以塑料薄膜的不透水性隔斷土壩漏水通道，以其較大的抗拉強度和延伸率承受水壓和適應壩體變形；而無紡布亦是一種高分子短纖維化學材料，通過針刺或熱粘成形，具有較高的抗拉強度和延伸性，它與塑料薄膜結合后，不僅增大了塑料薄膜的抗拉強度和抗穿刺能力，而且由于無紡布表面粗糙，增大了接觸面的摩擦系數，有利于復合土工膜及保護層的穩定。同時，它們對細菌和化學作用有較好的耐侵蝕性，不怕酸、堿、鹽類的侵蝕，在避光使用情況下，使用壽命更長。</span></p><p><br/></p></div> <h3 class="tag">相關標簽： </h3> <div class="page">上一篇：<a href="http://www.permaculturegreenhouse.com/news/459.html">土工膜在不同土質垃圾填埋場中施工要求（3）</a><br />下一篇：<span><a href="http://www.permaculturegreenhouse.com/news/461.html">垃圾填埋場土工膜應該怎么選</a></span></div> </div> </div> </div> <div class="page-mob-tool"> <ul> <li class="xymob-page-navbtn"><i class="icon-font icon-dots-horizontal"></i></li> <li class="xymob-page-backtop"><i class="icon-font icon-top"></i></li> </ul> </div> </div> </div> <div class="x-layout"> <div class="container-fluid"> <div class="row"> <div class="col-md-2 col-sm-12"> <div class="x-layout-logo"> <p><img src="/data/upload/image/20210118/1610949527106391.png" title="1610949527106391.png" alt="組 19.png"/></p> </div> <div 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