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第88章 强军之基(一)(1 / 2)

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腊月二十三日,是北方小年,也是民间祭灶的日子。据说这一天灶王爷都要上天向玉皇大帝报告这一家人的善恶,以供玉皇大帝赏罚。所以这一天,家家户户都要到街头买回用玉米或小米专制的“祭灶糖”,于晚上敬献祭灶,黏糊灶王爷嘴,免得上天瞎汇报,同时燃鞭放炮送灶神。

申时过罢,在吕曼青一再派人催促下,陈玉成才拖着疲累的身子,走出临汾铁场的大门,钻入陈得才派来的马车。

临汾铁场设在城南汾水岸边,距临汾城尚有三四里的路程。之所以设在这里,一是因为水利便利,便于铁矿、焦炭的运输;二是因为这一段水流较急,便于带动水车一类的水力机械;三则是这个铁厂从开始建设之初,便是以上海洋商的名义在此建厂。华夷有别,故建在城外以便管理。至于陈玉成,则是作为上海洋商派来的华人技师,督办并指导前期筹建和生产。

截至目前,临汾铁厂已经建成化铁炉一座,转炉一台,以及附设的枪炮厂。化铁炉没有采取立窑式样,而是采取的是马蹄形反射炉式样,在蓄热室没有建成之前,以反射炉形式也便于提升炉温,使铁水的温度能够尽快达到较高的温度,提高化铁效率,并减少随烟雾排出杂质对铁水的污染。

和贝塞麦不同的是,站在巨人肩膀上的陈玉成设计这个转炉是可转动炉子。炉体在没有钢板可以采用的情况下,陈玉成采用的是铸铁炉体。高约1.6米,可以装入熔化铁水800余斤;采用的是侧吹法,共有六个风口;鼓风机则是中国冶金史上伟大的发明----双动活塞式大风箱,水力、畜力或人力皆可,采用铸铁机械水排驱动,将圆周运动转换为往复运动,可以源源不断压入转炉所需的空气;

炉帽采用的是循环水箱式炉口,可以有效地减轻炉渣和炉气冲刷侵蚀;至于转炉在冶炼过程中,铁水含氧量太高造成的热裂问题,这个时候,英国人马西特已经找到了解决方法,那就是往钢水中加入含量15%—30%的镜铁,也就是锰铁,来消耗钢水中过多的氧气,同时也使钢水的品质得到提升。

炉衬用的是1875年托马斯采用的白云石砖砌筑的炉衬。白云石炉衬是碱性炉衬,主要是为了去除铁水中的磷矿质。虽然这个时代中国还无法鉴定铁矿石的磷含量,但是陈玉成知道,中国的铁矿大多含硫磷杂质较高。以白云石配合石灰石造碱性渣可以有效地去除铁矿石或生铁水中的磷元素,使钢的韧性加强。

晋南白云石储藏非常丰富,翼城和蒲县都有储藏。说起白云石还有一段意外惊喜,本来陈玉成准备令人在翼城勘探开采,不想在翼城一处生铁场发现了不少废弃的白云石。原来白云石和石灰石相似,铁厂在开采石灰石时,误将白云石当做了石灰石开采出来,为此还毁了几炉生铁。

这东西又重又沉,铁场场主无奈只能将之堆砌在一旁,每日看着心烦。听了铁场场主的抱怨,陈玉成却是如获至宝,高价收购了这些铁场场主口中的“废品”,并令铁场场主继续开采。让铁场场主惊愕之余笑开了花。

只是白云石耐火砖煅烧的温度相当高,大致在1600—1850度。在没有蓄热室的情况下,一般的窑都无法加热到这么高的温度。无奈情况下,陈玉成只得采用二步煅烧法。即使如此,烧出来的白云石耐火砖也是差强人意,耐用程度较低,需要经常更换。

也正是因为如此,陈玉成早早画好图纸,令潞安府在修建平炉的同时,早早修建带有蓄热室的竖窑。

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