In some steel making workshops, the existed inher- ent weaknesses of traditional carbon containing brick working lining, such as joint opening, vertical cracking of lining, and excessive erosion of brick edge, made it...In some steel making workshops, the existed inher- ent weaknesses of traditional carbon containing brick working lining, such as joint opening, vertical cracking of lining, and excessive erosion of brick edge, made it hard to satis]~ the demands of advanced steel produc- tion. A new-type carbon free corundum spinel brick and castable were developed based on the matrix optimized analysis, successfully applied for ultra-low carbon steel production. The advantages of the newly developed car- bon free working lining are mainly as follows： I ） the inherent weaknesses of joint opening, vertical cracking of lining, excessive erosion of brick edge, etc. are sur- mounted successfully, which improves the operational safety of ladles; 2 ） the outer temperature of the ladle shell decreases by 45 -50 ℃ compared with that of the traditional carbon containing brick lining; 3） the service life of new-type working lining is 150 -170 heats, near- ly doubling that of the traditional carbon containing brick lining; the specific eonaumption of refractories per ton steel decreases by about 20% ; 4） the carbon pickup of mohen steel is not obvious which is merely 5 - 10 ppm, which satisfies the demands of low ＆ ultra low carbon steel production.展开更多
本文是对山西省晋城市阳城县圣王坪遗址2020年调查发现的石制品研究。调查共获得石制品1717件;其中,地表采集11件,含细石器技术制品;清理地层剖面获得1706件,属旧石器文化遗存。剖面分4个层位,第3层和第4层是文化层的主体,也是本文研究...本文是对山西省晋城市阳城县圣王坪遗址2020年调查发现的石制品研究。调查共获得石制品1717件;其中,地表采集11件,含细石器技术制品;清理地层剖面获得1706件,属旧石器文化遗存。剖面分4个层位,第3层和第4层是文化层的主体,也是本文研究的对象和结论来源。石制品以小型和微型为主,原料以燧石为主。砸击技术占重要地位,尤其是第3层石核剥片的主要技术;该技术多应用于隐晶质的燧石和脉石英原料,具有相对较高的剥片程度,更适用于小型毛坯的开发与利用。石器组合以刮削器为主要类型,但第3层比第4层多了楔形析器和齿状器两种类型。石器修理锤击法,修理程度有限,缺乏再修理过程。遗址属于小型石片石器传统,第4层中部木炭样品的测年数据校正后为45590±510 BP cal,说明是晋南地区目前最早的旧石器时代晚期遗址。展开更多
文摘In some steel making workshops, the existed inher- ent weaknesses of traditional carbon containing brick working lining, such as joint opening, vertical cracking of lining, and excessive erosion of brick edge, made it hard to satis]~ the demands of advanced steel produc- tion. A new-type carbon free corundum spinel brick and castable were developed based on the matrix optimized analysis, successfully applied for ultra-low carbon steel production. The advantages of the newly developed car- bon free working lining are mainly as follows： I ） the inherent weaknesses of joint opening, vertical cracking of lining, excessive erosion of brick edge, etc. are sur- mounted successfully, which improves the operational safety of ladles; 2 ） the outer temperature of the ladle shell decreases by 45 -50 ℃ compared with that of the traditional carbon containing brick lining; 3） the service life of new-type working lining is 150 -170 heats, near- ly doubling that of the traditional carbon containing brick lining; the specific eonaumption of refractories per ton steel decreases by about 20% ; 4） the carbon pickup of mohen steel is not obvious which is merely 5 - 10 ppm, which satisfies the demands of low ＆ ultra low carbon steel production.
文摘本文是对山西省晋城市阳城县圣王坪遗址2020年调查发现的石制品研究。调查共获得石制品1717件;其中,地表采集11件,含细石器技术制品;清理地层剖面获得1706件,属旧石器文化遗存。剖面分4个层位,第3层和第4层是文化层的主体,也是本文研究的对象和结论来源。石制品以小型和微型为主,原料以燧石为主。砸击技术占重要地位,尤其是第3层石核剥片的主要技术;该技术多应用于隐晶质的燧石和脉石英原料,具有相对较高的剥片程度,更适用于小型毛坯的开发与利用。石器组合以刮削器为主要类型,但第3层比第4层多了楔形析器和齿状器两种类型。石器修理锤击法,修理程度有限,缺乏再修理过程。遗址属于小型石片石器传统,第4层中部木炭样品的测年数据校正后为45590±510 BP cal,说明是晋南地区目前最早的旧石器时代晚期遗址。
