第二十七章 铸造铁锅,我们是玩火的
90书院(90shuyuan.com)更新快,无弹窗!
炼铁炼出来几坨黑疙瘩,大家看它们的眼神,从最初的“宝贝”变成了“鸡肋”——吃不能吃,用不能用,还死沉。
“要不……磨一磨,当锤子使?”周德兴拿起一坨,在石头上敲了敲,火星四溅,但那铁疙瘩只是崩掉点渣,主体纹丝不动,“嘿,还挺硬!砸核桃肯定行!”
“咱们现在缺的是锅,不是锤子。”我叹了口气,看着那个煮什么都一股子焦糊味的破瓦罐,心里怀念铁锅炒菜的滋味——虽然连油都没有。
朱元璋没说话,只是用那把镶宝石的匕首(现在兼职雕刻刀),在一块相对平整的石英石上,歪歪扭扭地划拉。他想刻个锅的形状,但石英石硬得要命,匕首划上去只留下浅浅的白痕,进度感人。
“老板,这么刻不行,匕首废了也刻不出来。”我阻止了他祸害我们唯一的好工具,“得用更硬的东西,或者……用火?”
“火?”朱元璋抬头。
“石英的熔点在1700度以上,咱们那破炉子烧不到。”我摇头,“但也许……可以不用刻?用现成的?”
“现成的?”周德兴凑过来,“这石头长得也不像锅啊!”
“找两块形状合适的,中间是凹的,合起来,不就是个模子?”我比划着,“或者,用湿沙子,拍出个锅的形状,把铁水浇进去?”
“沙模?”朱元璋若有所思,“沙子不行,一浇就散了,得是耐火的。”
“黏土!”李狗剩忽然小声说,“矿洞里有黏土,和点水,捏成锅的样子,烤干了,是不是就能用?”
黏土?对啊!陶瓷就是用黏土烧的!虽然我们没釉,烧不出瓷器,但烧个素烧的陶模应该可以!黏土比石英好加工多了!
“试试!”朱元璋拍板。
于是,我们的“铸造大业”换了思路。从“雕石头”改为“玩泥巴”。
李狗剩和赵铁柱去矿洞深处挖来质地细腻的黏土。我和周德兴负责和泥——加水,加一点点细沙(增加强度),反复揉搓,直到像面团一样柔软有韧性。朱元璋则用树枝在地上画了个简单的大碗形状——我们目标是先做个厚实点的、带把的“深碗”,能煮东西就行。
然后,就是技术活了:用和好的黏土,拍打出“碗”的内外模。内模要小一圈,外模要大一圈,中间留出大约一指厚的空隙,那就是未来铁水的位置。还要留出浇口和排气孔。这对我们这群“泥腿子”来说,难度不亚于让张飞绣花。
“歪了歪了!这边厚那边薄!”周德兴大呼小叫。
“别碰!要裂了!”我手忙脚乱。
“浇口留大点!不然铁水倒不进去!”朱元璋冷静指挥。
折腾了半天,总算捏出了一对歪瓜裂枣、勉强能合在一起的黏土模子。小心翼翼地在火堆旁,用低温慢慢烘烤,怕烤裂了。烘了一夜,模子变得干硬,掂了掂,还挺结实。
“成了?”周德兴看着那两个黑不溜秋的土疙瘩,一脸怀疑,“这玩意儿,能浇铁水?不会炸了吧?”
“不知道,试试。”朱元璋依旧是那句话。他把之前炼出来的几坨生铁疙瘩,重新敲碎,准备回炉。
这一次,我们有了“铸造”这个明确目标,干劲更足了。炉子重新点火,鼓风机呼哧呼哧。碎铁块和木炭交替加入。有了上次的经验,这次火候控制稍微好了点,炉温似乎也高了些。
等了约莫一个时辰,朱元璋判断铁水差不多了。我们小心翼翼地把合好的黏土模用湿泥固定在沙坑里,浇口朝上。
最关键的时刻到了——浇注!
“铁水来了!”周德兴用临时做的长柄陶勺(也是黏土烧的,不知道耐不耐用),从炉子出渣口舀起一小勺暗红色、黏稠滚烫的铁水!他的手明显在抖,铁水在勺子里晃动,溅出危险的火星。
“稳!快!”朱元璋低喝。
周德兴一咬牙,对准黏土模的浇口,将铁水缓缓倾注进去!
“嗤——!”
滚烫的铁水遇到冰冷的黏土模,爆发出剧烈的声响和浓密的蒸汽!我们心都提到了嗓子眼,生怕模子当场炸裂。
铁水不多,很快浇完了。浇口处还残留着一点红热的铁水,慢慢凝固。
我们屏住呼吸,等了大概一炷香时间,估摸着铁水在里面凝固得差不多了。朱元璋用木棍轻轻敲了敲模子,发出沉闷的“咚咚”声,没有裂开的迹象。
“成了?”周德兴搓着手,跃跃欲试。
“等彻底凉透。”朱元璋很谨慎。
又等了小半个时辰,模子摸上去只是微温。我们小心地扒开固定用的湿泥,然后……用力砸开外模!
“咔嚓”一声,黏土外模碎裂剥落,露出里面一个黑乎乎、还带着毛刺和浇口痕迹的……铁疙瘩?形状倒是像个厚底碗,但表面坑坑洼洼,布满气孔,还有很多黏土渣子粘在上面。
“这……”周德兴傻眼了,“怎
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