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class="span_2"></span></a><span id="adptref" class="span_3"></span><span id="adptref" class="span_4"></span></div><div id="adptref" class="center_r left"><div id="adptref" class="nowLocation"><span><a href="/">首頁(yè)</a> > <a href="/nlist-1-1.html">新聞中心</a> > <a href="/nlist-2-1.html">公司新聞</a> > <a href="/news-7-1.html">蒸壓加氣磚設(shè)備在生產(chǎn)蒸壓磚的時(shí)候?qū)υ系囊?/a></span></div><div id="adptref" class="news_content"><h1>蒸壓加氣磚設(shè)備在生產(chǎn)蒸壓磚的時(shí)候?qū)υ系囊?/h1><p class="time">作者:銘澤機(jī)械來(lái)源:銘澤機(jī)械時(shí)間:2013-01-30 15:04:21 點(diǎn)擊次數(shù):4526</p><div id="adptref" class="news_c_Content"><p> 1、對(duì)水泥原料的要求： <br /> 水泥在水化的時(shí)候除了能生成大量的水化鋁酸鈣、水化硅酸鈣等水化物外,還會(huì)析出大量的Ca(OH)2，雖然在水泥中CaO的含量大約為60%左右,而其中也只有20%左右的物質(zhì)能經(jīng)過水化析出游離的Ca(OH)2。但是在蒸壓條件下,含硅材料中的SiO2和Al2O3和這些游離的Ca(OH)2經(jīng)過化學(xué)作用,會(huì)以水熱合成的方式生成水化鋁酸鈣和水化硅酸鈣。這兩種方式所產(chǎn)生的水化礦物質(zhì)能夠提高制品的強(qiáng)度。因此采用石灰-水泥混合鈣質(zhì)體系更加能提高蒸壓加氣磚的強(qiáng)度。 <br /> 2、對(duì)砂原料的要求： <br /> 因?yàn)樯暗幕瘜W(xué)成分和礦物質(zhì)組成對(duì)蒸壓加氣磚的質(zhì)量影響很大，所以對(duì)砂的選擇要求很高,一般按照J(rèn)C/T622《硅酸鹽建筑制品用砂》中規(guī)定的標(biāo)準(zhǔn)進(jìn)行選用。一般情況下, 石英含量越高的砂,蒸壓加氣磚設(shè)備生產(chǎn)出來(lái)的蒸壓磚的質(zhì)量就越好。 <br /> 3、對(duì)生石灰原料的要求：<br /> 在蒸壓加氣磚設(shè)備的蒸壓釜蒸壓過程當(dāng)中,要通過含硅材料中的SiO2和l2O3與生石灰中有效的Ca進(jìn)行充分的水熱反應(yīng),然后生成水化鋁酸鹽和水化硅酸鹽從而獲得強(qiáng)度。在參與鋁粉的發(fā)氣反應(yīng)過程中，會(huì)釋放出大量的熱能,這能使坯體溫度達(dá)到80℃~90℃,從而使其在靜停硬化階段得到自然養(yǎng)護(hù)。生產(chǎn)蒸壓加氣磚所使用的生石灰應(yīng)當(dāng)符合JC/T621《硅酸鹽建筑制品用生石灰》要求的標(biāo)準(zhǔn)，因?yàn)槿绻趩挝粫r(shí)間里釋放出的熱量太大的話,又會(huì)影響到養(yǎng)護(hù)的效果。所以,還需要添加調(diào)節(jié)劑，用來(lái)控制石灰的水化放熱的速度。 <br /> 4、對(duì)礦渣原料的要求 <br /> 礦渣(CaO+MgO)的質(zhì)量分?jǐn)?shù)至少應(yīng)該是大于等于65%的礦渣，因?yàn)槠渌牟Ａз|(zhì)成分中的SiO2和Al2O3具有活性，能夠儲(chǔ)藏大量的化學(xué)能量,它不僅可以提高澆注的穩(wěn)定性,還可以對(duì)坯體的硬化起到一定的促進(jìn)作用。生產(chǎn)蒸壓加氣磚的礦渣是經(jīng)過水淬的粒狀高爐礦渣,在蒸壓條件下,礦渣中的硅酸鹽礦物質(zhì)能夠與SiO2產(chǎn)生作用并生成低堿水化物,從而提高蒸壓加氣磚的強(qiáng)度。 <br /> 5、對(duì)粉煤灰原料的要求 <br /> 粉煤灰具有集料和生成膠凝材料的雙重作用。它主要用于蒸壓磚設(shè)備生產(chǎn)線，粉煤灰應(yīng)該具有必要的細(xì)度,當(dāng)細(xì)度不足的時(shí)候，應(yīng)該通過二次加工再進(jìn)行細(xì)磨。粉煤灰同時(shí)還能提供CaO與SiO2和Al2O3進(jìn)行水熱反應(yīng),生成水化鋁酸鹽和水化硅酸鹽,使磚獲得強(qiáng)度。 </p> <p> 6、蒸壓養(yǎng)護(hù) <br /> 蒸壓磚設(shè)備生產(chǎn)線的蒸壓養(yǎng)護(hù)，它不僅關(guān)系到生產(chǎn)效率的高低和能源消耗的大小，同時(shí)也關(guān)系到制品性能的好壞與否，它是獲得強(qiáng)度等性能的必要條件。因?yàn)橥胁獊?lái)石等產(chǎn)物只有在174.5℃以上的溫度時(shí)才會(huì)大量生成,所以蒸壓磚只有在此溫度和壓力水平保持一定的時(shí)間,才會(huì)具有優(yōu)質(zhì)的綜合物理性能。養(yǎng)護(hù)制度可以更大限度地避免了坯體和制品受到的損傷，并且還對(duì)坯體進(jìn)行充分和合理的養(yǎng)護(hù),從而使制品在較短時(shí)間內(nèi)達(dá)到設(shè)計(jì)強(qiáng)度要求。蒸壓磚的養(yǎng)護(hù)時(shí)間根據(jù)是否真空等情況,一般需要6h~12h。 </p></div><div id="adptref" class="tags"> 熱門標(biāo)簽：蒸壓磚氣磚設(shè)備 </div><div id="adptref" class="PrevOrNewt"><div id="adptref" class="Prev"> 上一篇：<a href="/news-6-1.html">解析蒸壓灰砂磚設(shè)備生產(chǎn)墻體材料的優(yōu)越性</a></div><div id="adptref" class="Next"> 下一篇：<a href="/news-8-1.html">粉煤灰蒸壓磚設(shè)備生產(chǎn)的蒸壓磚和免燒磚有什么區(qū)別?</a></div></div></div></div></div><div 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