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<\/span><\/span> <\/p>水玻璃砂再生技術(shù)<\/span><\/span><\/em><\/strong> <\/p>根據(jù)水玻璃舊砂的特點(diǎn)，我公司和某科技大學(xué)開發(fā)成功了“強(qiáng)擦洗新型水玻璃舊砂濕法再生系統(tǒng)”。新型水玻璃舊砂濕法再生系統(tǒng)主要由砂塊破碎機(jī)、濕法再生機(jī)、砂水分離及脫水設(shè)備、污水處理設(shè)備等組成。該系統(tǒng)具有如下特點(diǎn)：<\/span><\/span> <\/p>（<\/span>1<\/span><\/span>）采用兩級(jí)強(qiáng)擦洗濕法再生工藝，<\/span>Na2<\/sub>O<\/span><\/span>的去除率高：兩級(jí)強(qiáng)擦洗濕法再生<\/span>Na2<\/sub>O<\/span><\/span>的去除率為<\/span>85~95%<\/span><\/span>；單級(jí)濕法再生，<\/span>Na2<\/sub>O<\/span><\/span>的去除率為<\/span>70~80%<\/span><\/span>。<\/span><\/span> <\/p>（<\/span>2<\/span><\/span>）濕法再生砂的質(zhì)量好，可代替新砂作面砂或單一砂使用。<\/span><\/span> <\/p>（<\/span>3<\/span><\/span>）濕法再生的耗水量小，噸再生砂耗水<\/span>2~3<\/span><\/span>噸；污水經(jīng)處理后可循環(huán)使用或達(dá)標(biāo)排放。<\/span><\/span> <\/p>“強(qiáng)擦洗新型水玻璃舊砂濕法再生系統(tǒng)”經(jīng)省部級(jí)組織的專家鑒定認(rèn)為，它具有：系統(tǒng)組成緊揍合理、設(shè)備結(jié)構(gòu)簡單新穎、磨損件少，<\/span>Na2<\/sub>O<\/span><\/span>去除率高、再生砂的質(zhì)量好，耗水量小、用水實(shí)現(xiàn)循環(huán)等優(yōu)點(diǎn)，具有很好的推廣應(yīng)用價(jià)值。<\/span><\/span> <\/p>采用兩級(jí)強(qiáng)擦洗的新型水玻璃舊砂濕法再生系統(tǒng)工藝流程如圖<\/span>1<\/span><\/span>所示。<\/span><\/span> <\/span><\/span><\/span> <\/p> <\/span><\/span><\/span>圖<\/span>1 <\/span><\/span><\/span><\/span><\/p>新型水玻璃舊砂濕法再生系統(tǒng)工藝流程圖<\/span> <\/p><\/span><\/p> <\/div><\/span><\/p>新型水玻璃舊砂濕法再生系統(tǒng)的關(guān)鍵技術(shù)是：強(qiáng)擦洗舊砂濕法再生機(jī)和少耗水量的兩級(jí)濕法再生工藝，污水處理循環(huán)回用系統(tǒng)等三項(xiàng)技術(shù)。<\/span><\/span> <\/p>廢水玻璃砂治理項(xiàng)目的經(jīng)濟(jì)效益分析<\/span><\/strong> <\/p> 目前，鑄造廠的新砂購入成本約為每噸<\/span>180~300<\/span><\/span>元。初步分析，含泥量較大、細(xì)砂含量較多，舊砂的再生回收率約<\/span>75~80%<\/span><\/span>。但濕法再生的水玻璃砂的質(zhì)量，會(huì)優(yōu)于現(xiàn)有的新砂。按每噸濕法再生砂的成本為60-70<\/span>元計(jì)（含電力消耗費(fèi)、燃料消耗費(fèi)、設(shè)備折舊費(fèi)、污水處理費(fèi)、人工管理費(fèi)等），每噸濕法再生水玻璃砂的經(jīng)濟(jì)效益約<\/span>100~200<\/span><\/span>元。<\/span><\/span> <\/p>因此，如按每年再生<\/span>100,00<\/span><\/span>噸水玻璃砂計(jì)算，本項(xiàng)目的年經(jīng)濟(jì)效益約為<\/span>100~200<\/span><\/span>萬元。<\/span><\/span> <\/p><\/div><\/div><\/div>
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