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} }); function showliuyan(me, showtype){ if(showtype==0){ //$("#Content").val($("#Content").attr('placeholder')); Content= document.getElementById('PopMsgFrom').Content.getAttribute('placeholder'); document.getElementById('PopMsgFrom').Content.value=Content; } if(showtype==1){ // $("#Content").val($(me).text()); alert($(me).text()); document.getElementById('PopMsgFrom').Content.value=$(me).text(); } $(".fxp").css("display","flex"); } function close_popwin(){ $(".fxp").css("display","none"); // 关闭虚拟电话后的留言� $(".dhxj").css("display","none"); $(".dhxjbox").css("display", "none"); $(".dhxjbox2").css("display", "none"); return false; } </script>  <div class="cpjs"> <div class="cpjs_tab"> <div class="js_cpjj" style="border-bottom: 3px solid #1479d7; color: #1479d7;">产品介绍</div> <div class="js_cxd">创新炸�/div> <div class="js_xgfa">相关方案</div> <div class="js_xgzl">相关资料</div> <div class="js_yhpl">用户评论</div> <div class="js_gsdt">公司动�?/div> <div class="js_wsj">问商宵�/div> </div> <script> $(function(){ // 切换 $(".cpjs_tab a").click(function(){ $(".cpjs_tab a").css({"color":"#4F5862","border-bottom-color":"transparent"}); $(this).css({"color":"#1479d7","border-bottom-color":"#1479d7"}); }); }); </script>  <div class="cpjj"> <p>　中频炉坩埚的工作条件十分恶劣，而且衬壁较薄，内侧直接受高温金属液热冲击与渣液的侵蚀，在电磁场作用下所形成的搅拌力使坩埚壁受到金属较强的冲刷。坩埚壁外侧则接触水冷感应线圈，内外温差很大，为了提高坩埚的寿命，因此，对制作坩埚的耐火材料，有较严格的要求、�/p><p><br/></p><p>　　(l) 耐高温性能。制作坩埚的耐火材料应耐受大于 1700摄氏度的高温，软化温度应大于1650摄氏� 、�/p><p><br/></p><p>　　(2) 热稳定性。坩埚壁在工作时温度波动极大，而且温度场分布不均，坩埚壁因此会不断产生体积的膨胀与收缩而导致产生裂纹，这直接影响到坩埚的使用寿命、�/p><p><br/></p><p>　　(3) 化学性能稳定。坩埚材料在低温时不应产生水解粉化，在高温时不易被分解和还原，不易受熔渣及金属液侵蚀、�/p><p><br/></p><p>　　(4) 具有较高的力学性能。在常温时能承受炉料的冲击，在高温时能承受　金属液的静压力和强烈的电磁感应搅拌作用，坩埚壁不易被冲刷膳损和侵蚀口高温抗折强度大还意味着耐火材料杭渣侵蚀能力和抗热振动能力强,是耐火材料，特别是碱性耐火材料的重要特性、�/p><p><br/></p><p>　　(5) 较小的导热性，以提高炉子的热效率、�/p><p><br/></p><p>　　(6) 绝缘性能好坩埚材料在高温状态下不得导电，否则会引起漏电和短路而造成事故。在使用前宜使用磁选法清除耐火材料中混人的导体杂质、�/p><p><br/></p><p>　　(7) 材料的施工性能好，易修补，即烧结性能好，维修方便、�/p><p><br/></p> </div>  <div class="cxd"> <div class="cxd_tit"><span></span>创新炸�/div> <p style=" color: #333; font-size: 14px; margin: 10px 0 0; line-height: 26px;"> 暂无数据� </p> </div>  <div class="xgfa"> <div class="xgfa_tit"> <div> <span></span>相关方案 </div> </div> <div class="xgfa_box" style="display: block;"><div style="padding:10px;">暂无相关方案、�/div> </div> </div> <script> $(function(){ // 切换 $(".xgfa_tit_ul li").hover(function(){ $(".xgfa_tit_ul li").css({"color":"#4F5862","border-bottom-color":"transparent"}); 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