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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 style="white-space: normal; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); box-sizing: border-box; margin-top: 0px; margin-bottom: 0px; padding: 0px; font-family: " helvetica="" pingfang="" hiragino="" sans="" microsoft="" background-color:=""> 砂石料经过制砂机破碎后，用皮带输送机送到振动筛进行筛选，大于4.75mm的则留在筛网上，再反回到制砂机重新破碎；而小�?.75mm的颗粒就是砂石料，但由于受破碎机的破碎作用，其中含有小于75μm的石粉含量在18-30%之间不等，石粉含量超标，而砂石料中允许小�?5μm 的石粉含量在5-7%，因此就需要将其中多余的石粉进行筛选掉、�/p><p style="white-space: normal; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); box-sizing: border-box; margin-top: 0px; margin-bottom: 0px; padding: 0px; font-family: " helvetica="" pingfang="" hiragino="" sans="" microsoft="" background-color:=""> 为了解决人工砂含粉量这一问题，人们首先采用的是通过水洗方法来实现去除砂中的石粉，这样一来，就要求制砂周围有较丰富的水资源，但是通过湿法水洗不仅会洗�?5μm以下的颗粒，同时还洗走了包括150μm�?00μm、甚至是600μm的颗粒；因此，人工砂的优点也就被水洗流失了，而且这种水洗方法也受水资源的影响，另外对于人工砂中的石粉的冲洗也是对矿产资源的一种浪费，并且石粉冲洗之后也就破坏了人工砂的合理级配，不利混凝土的和易。所以在这多重矛盾之下，就必须有一种新的人工砂分选设备来代替，因此风选砂石系统成为一种发展趋势，砂石脱粉机的诞生，解决了这一市场的需求、同时保护了环境、�/p><p><img src="//www.znpla.com/img1/img/daily/2021/04/17/160619_331067_procont.jpg" style="" title="160619_331067_procont.jpg"/></p><p><img src="//www.znpla.com/img1/img/daily/2021/04/17/160619_531605_procont.jpg" style="" title="160619_531605_procont.jpg"/></p><p><img src="//www.znpla.com/img1/img/daily/2021/04/17/160619_656024_procont.jpg" style="" title="160619_656024_procont.jpg"/></p><p><br/></p> </div>  <div class="cxd"> <div class="cxd_tit"><span></span>创新炸�/div> <p style=" color: #333; 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