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动态新闻 => 小青瓦的制作工艺

小青瓦的制作工艺  

     我国传统的小青瓦制作工艺是在烧成高温阶段后期将全窑封闭从而使窑内供氧不足,砖坯内的铁离子被从呈红色的三价铁还原成小青瓦的低价铁而成小青瓦。据有关砖家的研究,小青瓦在抗氧化,水化,大气侵蚀等方面性能明显优于红砖,中国古代的“秦砖汉瓦”,能历经上千年仍保存完好可见小青瓦性能优良。但是因为小青瓦的烧成工艺复杂,能耗高,产量小,成本高,难以实现自动化和机械化生产,所以轮窑及挤砖机械等大规模工业化制砖设备问世后,红砖得到了突飞猛进的发展,而小青瓦除个别仿古建筑仍使用外,已基本退出历史的舞台,

  随着科学技术的发展和人们环保意识的加强,不断有新的各种免烧砖问世,但是专家们认为,迄今为止红砖依然是性能最优良,舒适感最好的建筑墙材。在今后相当长的时间红砖的地位其他产品仍难以取代。

  改革开放以来,我国的红砖产量呈几何级数式增长,但众多的小型红砖厂取土烧砖滥挖乱采,造成大量农田被毁,因此从1993年开始,国家已开始限制和取缔毁田烧砖的行为,文明规定禁止生产粘土实心砖,限制生产粘土空心砖,即所谓“禁粘限实”政策,同时而推广和鼓励以页岩砖,煤矸石矿为原料生产红砖。

  China's traditional small tiles fired late in the production process is the high temperature phase will be closed so that the whole kiln kiln lack of oxygen , the iron ions are brick from red ferric reduced to small tiles of low iron into small tiles . According to the research about the brick house , small tiles performance in terms of anti-oxidation, hydration , atmospheric erosion was significantly better than the red brick , ancient China , " Qin brick tile ", can still intact after thousands of small tiles visible performance excellent . But because of the complexity of small tiles firing process , high energy consumption , low yield, high cost , difficult to achieve automation and mechanization of production , so the crowded brick kiln and brick-making machinery and other large-scale industrial equipment available, red brick has been rapid development , in addition to individual and small tiles antique buildings still use, has basically quit the stage of history ,

  With the strengthening of scientific and technological development and people's environmental awareness , there have been a variety of unburned advent of new , but experts believe that red brick is still by far the best performance , comfort and the best building wall materials . In the future status of red brick for a long time other products are still difficult to replace .

  Since the reform and opening up, China 's red-brick production growth exponentially , but many of the small red brick earth brick indiscriminate digging Luancai , causing a lot of farmland were destroyed , so from the beginning of 1993 , the state has begun to limit and ban ruined Tian brick behavior , civilized prohibit the production of clay bricks , hollow clay brick production limit , the so-called "no real limit stick " policy, while at the same time promote and encourage shale bricks, coal gangue mineral raw materials for the production of red brick .发布日期:[2014-2-9]    共阅[2901]次发布日期:[2017-10-19]    共阅[538]次【打印此页】 【返回】

发布日期:[2019-7-30]    共阅[615]次
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