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刘备的日常 熏香如风 1115 字 2022-04-20

“来者何人。”城头兵卒,高声喝问。

“阳翟郭嘉。”郭嘉推窗答曰。

“意欲何为。”

“自为交易。”

“尊驾稍待。”果然来者不拒。

待吊桥落下,城门洞开。龚都遂引车驾入城。

棠谿城横竖一里余,东西略长,南北稍短。坐落在十里棠谿亭内,从建制上说,乃是乡邑。棠谿城居中,与冶炉、合伯二城,各距数里,匠人自成聚落,便是三城民众来源。三城互为犄角,大致呈“品”字形。冶炉城乃为冶铁,合伯城多为铸剑,棠谿城多为工匠生活起居。

车驾一路行来,只见沿棠谿水两岸,排列无数冶炼高炉。围绕棠谿湖,冶铁炉尤其多。炉顶烟囱耸立,吞云吐雾。烟气汇聚于顶,连成长龙。云蒸霞蔚,顺棠谿水而下,如雾似幻,热气腾腾。两岸冰雪消融,嫩芽早发。

除去木炭,石炭及鱼油,亦是常备燃料。炉旁还设橐龠(tuó yuè)鼓风助火。

另有许多圆窑,广布于冶炼场周围。圆窑由:窑门、火池、窑膛、烟囱,四部分组成。窑建在炉前。除用于烧瓦、砖、鼓风管等,建炉诸材外,还有烘范、铁器热处理及烧制陶器等,多种功用。

高炉炉体,皆用耐火砖垒砌。炉基则由粘土加小鹅卵石、炭末、矿石粉等,夯土版筑而成,异常坚固。“加料口”位于炉顶,匠人将矿石及木炭等混合物料,倾入炉缸,点火冶炼。炼好的铁水则由“出铁水口”流出,注入炉前模具,铸成铁板或铁碇。故炉前还搭建有“工棚”,不仅可遮风挡雨,防止铁水流出后遇水冷却或爆炸;还可利用架设在横梁上的杠杆,向炉顶加入混合物料,搬运新铸铁碇,及清理炉内结瘤积铁。

高炉炉缸,呈椭圆形。分:炼炉、锻炉、炒钢炉、熔铁炉等,不一而足。时下熔铁,已采用先进的“换热式热风炉”。而椭圆形炼炉及鼓风设施的运用,既增大了炉缸体积,有利于提高冶铁容量;又能缩短风管距高炉中心区的距离,进而提高生产效率。类似高炉,可日产铸铁一吨。

话说,炉缸由圆形到椭圆,乃是炼铁历史上的一次技术革新。直到一千多年后,西方才有类似炉体出现。

窥一斑而知全豹。单单一个椭圆炼炉,便可知大汉技艺之强,独步天下。

时下,性能趋近于钢,被后世称为“球墨铸铁”的高强度铸铁技艺,早已全面普及。铸铁脱碳成钢,亦非难事。淬火、冷锻、炒钢……各地名匠,各有其独到之处。

冷兵器时代,二项决定性技艺:种田和冶铁,大汉皆无可匹敌。

言归正传。

城内街巷纵横,酒垆、商肆,不一而足。还有一座占地颇广的府邸。前汉时为“铁官长”官寺。前汉时,产铁地区置铁官,设铁官长,主鼓铸;不产铁的地区,置小铁官,铸旧铁。今汉除铁官。现为匠人首领,棠谿典居所。

府中卫士,神情肃穆,皆披铁甲。虎背熊腰,双臂尤其健硕,皆是打铁力士出身。

郭嘉还发现,甲胄上铭文,各不相同。有棠谿,墨曜,合伯,邓师,宛冯,龙渊,太阿,莫邪,干将,不一而足。话说,棠谿、龙渊、干将、莫邪等九大名剑,皆出于此。换言之,棠谿亭十里之内,有九大铸派。各以所铸宝剑名为剑炉名。又以剑炉名为门派号。

果不其然。

待郭嘉并龚都,登堂入室。只见上首端坐一饶须老者。须发花白,年过百半。各有四人,分列左右。包头冒絮(头巾),居中绣有墨曜,合伯,邓师,宛冯,龙渊,太阿,莫邪,干将,八大铸剑门派。上首老者,自戴棠谿冒絮。不多不少,共计九派。

“阳翟郭嘉,拜见棠谿‘老将军’。”

“你识得老夫?”如此说来,此人必是前五官中郎将,棠谿典无疑。

“在下实不知也。”郭嘉实言相告:“来时,幸有耳闻。”

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