第19章 铁锄收薯,窖藏安粮
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第19章铁锄收薯,窖藏安粮(第1/2页)
方正不敢有丝毫懈怠,目光死死锁定炉体,一边不断添补木炭维持火势,一边匀速拉动皮囊稳定送风,让炉内始终保持高温密闭的还原环境。
上千度的高温持续炙烤,铁矿石内部结构逐渐瓦解。氧化铁在高温与碳元素的作用下,被逐步还原,零散的铁元素慢慢析出、聚集,在炭火之间凝结成团,形成疏松多孔的海绵状铁块。
矿石中无用的杂质熔化成液态矿渣,顺着倾斜的出渣口缓缓向外流淌,接触空气后迅速冷却,凝结成一块块黑亮通透的玻璃状硬块。
炼铁的这一日,方正几乎不眠不休,寸步不离炼铁炉。灼热的气浪烘烤着肌肤,汗水反复浸透又风干破旧的粗布衣衫,手臂长时间重复推拉动作,酸胀发麻,肌肉僵硬,可他依旧咬牙坚持,不曾停歇片刻。
他抬手抹了一把脸上的汗渍,虎口微微震颤,却眼神坚定:“炼铁最忌中途断温,一旦火势回落、温度下降,未还原的矿石就会彻底报废,所有燃料、矿石全都白费。我必须撑住。”
不知熬到何时,炉内火势渐渐衰弱,赤红的炉壁慢慢暗沉冷却,烟火尽数消散。方正取来一根坚硬长木枝,小心翼翼拨开炉口堆积的灰烬与黑色残渣。
火光散尽,一块灰黑色、表面布满细小孔隙、质地粗糙厚重的海绵铁,静静卧在漆黑的炉底。
这是他流落战国荒野以来,亲手炼出的第一块人工铁。
这块海绵铁杂质繁多、质地疏松,孔洞密布,韧性与硬度远比不上后世精炼钢铁,可毋庸置疑,这是一块真正意义上的铁。
方正压不住心底翻涌的激荡情绪,俯身轻轻触碰微凉的铁块,粗糙的触感真实厚重。历经数日筹备、整日煎熬,终于得偿所愿。
“成了。”
他嗓音略带沙哑,语气却满是欣喜,低声呢喃,“哪怕杂质再多、质地再差,也是我踏入铁器时代的第一步。有了这一块,往后就会有无数块。”
没有过多停歇,他立刻在炼铁炉旁垒起一座小巧的锻铁石灶,添入优质木炭,重新引火升温。将粗糙的海绵铁放置在炭火正中心,持续鼓风加热,让铁块通体受热。
待到铁坯烧得赤红透亮、质地绵软柔韧之时,他手持自制粗木夹钳,稳稳将铁块夹出,搁置在平整光滑的巨大青石之上。
方正举起提前备好的厚重石锤,手臂发力,猛然向下锻打。
“铛!”
沉重的撞击声回荡在旷野,细碎火星四溅飞射,铁块内部混杂的矿渣杂质被硬生生挤压剥离,顺着赤红的铁坯边缘不断脱落。
一次锻打远远不够。他不断将铁坯重新送入炭火灼烧,烧红之后再次取出捶打,反复折叠、反复锻压。
“海绵铁疏松多孔,杂质内嵌。唯有千锤百炼,不断折叠锻打,才能挤出残渣,压实铁身。”
方正呼吸沉稳,每一次挥锤都力道十足、落点精准,一丝不苟,“杂质不除干净,铁器脆而易断,根本无法投入劳作使用。”
一下、两下、三下……沉闷厚重的敲击声连绵不绝,响彻河畔。原本疏松粗糙的海绵铁,在一次次烧锻捶打之中,慢慢褪去杂质,颜色愈发暗沉,质地愈发紧实坚硬。
孔洞消失、裂痕闭合,铁坯形态愈发规整,敲击之声从沉闷浑浊,逐渐变得清脆利落、铿锵有力。
待到铁坯质地均匀、坚韧不易碎裂、音色清亮之时,方正开始按照预先构思的农具形制,精准塑形。他着重锻打铁刃部位,慢慢压薄延展,打磨出平滑锋利的斜口,又在尾部捶打出规整的空心銎口,方便后续安装结实木柄。每一锤都稳、准、沉,兼顾牢固度与实用性,力求打造出耐用趁手的农具。
“先打造一锄一斧。”
方正一边精准捶打铁坯,一边冷静规划,“铁锄用来开荒松土、深耕种地,铁斧用来劈柴伐木、修整建材,刚好解决眼下最棘手的劳作难题。”
落日再度西沉,暮色缓缓笼罩旷野。不知耗费了多少时辰,在无数次沉重锻打之下,一把形制规整、刃口轻薄锋利的铁斧,外加一把厚实坚固、适配耕地的铁锄,终于完整成型。
方正拿起一小块废弃铁料,抬手用新开刃的铁斧轻轻一砍,坚硬的木段应声断裂,切口平整光滑,利落干脆。这般锋利程度,是所有石器都无法企及的高度。
他指尖轻轻抚过冰冷锋利的铁刃,金属特有的微凉触感透过皮肤传入心底,暗沉的刃口泛着淡淡冷光,坚硬致密,沉稳厚重。
(本章未完,请点击下一页继续阅读)第19章铁锄收薯,窖藏安粮(第2/2页)
方正凝视着眼前两把崭新的铁器,疲惫的眉眼间满是释然与笃定,低声感慨:“从今往后,我不再困于石器桎梏。手握铁器,可耕可伐、可造可修。这片乱世荒野,我终于拥有了真正扎根生长的底气。”
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