In order to solve the problems effectively, under the auspices of 863 plan in china, the synthesis diagnosis has been carried by means of measuring and numerical imitating the combustion chamber of refining column, and some conclusions is such as : ( 1 ) through measuring the temperature and combustion in the burning chamber of the refining column, the result shows the temperature difference on the same level is more than that in height direction, and there is a few of co in bottom of burning chamber. ( 2 ) in order to ensure normal work of flue system in lead column in the course of zinc refining, theoretic calculation and measure about the flow resistance of exhaust gas are carried through. the results of study reveal that drawing out force of chimney is inadequate, which is mainly caused by illogicality of flue construction
在研究過程中,採取了現場實測和數值模擬手段對韶關冶煉廠鋅精餾
鉛塔燃燒室及排煙系統進行了綜合診斷,具體結果包括如下: ( 1 )完成鋅精餾
鉛塔燃燒室內溫度測試以及燃燒狀況的測試,結果發現:
鉛塔燃燒室內水平方向的煙氣溫度並非均勻,而且其溫差比上下方向的溫差更大,以及
鉛塔燃燒室尾部存在co未燃燼問題; ( 2 )為了保證
鉛塔煙氣系統的正常工作,對煙道系統的阻力進行了理論計算及測試分析,結果發現:鋅精餾
鉛塔煙氣系統中煙囪抽力不夠,這主要是煙道結構不合理所造成的。
In the light of tectonic evolution stage and metallogenesis, these metallogenic system ( assemblage ) could be classified as follows : ( 1 ) the pre - divergent metallogenic system in the southwest margin of north china paleocontinent in the archean - meso proterozoic : dongdashan iron, jinchuan nickel - copper. ( 2 ) the divergent metallogenic system in the northern margin of the qaidam paleoplate in the middle - late proterozoic : huashugou - liugouxia iron. ( 3 ) the metallogenic system in the active margin in the early paleozoic : the metallogenic assemblage in the island arc - rift in the early stage ( baiyinchang - qingshuigou copper - polymetallic ) ; the metallogenic assemblage in island arc in the middle - late stage ( honggou - jiaolongzhang copper - polymetallic ) ; the back - arc extensional basin ( zhuzhuiyaba - jiugequan - shijuli copper ) ; the metallogenic assemblage in connection with subduction and magmatic - hydatogenesis ( taergou - xiaoliugou wolfram ; huashugou - liugouxia copper ; dadonggou - diaodaban lead - zinc ) ; the metallogenic assemblage is related to the oceanic crustal shards ( dadaoerji chromite ; yushigou chromite ). ( 4 ) the metallogenic system has something to do with collision - type orogeny : the metallogenic assemblage in foreland basin ( tianlu copper ) ; the metallogenic assemblage with the intracontinental orogeny and ductile shear ( hanshan - yingzhuishan gold )
根據構造發展階段和成礦作用特點,確定本區成礦系統及組合如下: ( 1 )華北板塊西南邊緣太古宙中元古代裂解期前成礦系統:東大山鐵成礦組合,金川鎳銅成礦組合; ( 2 )柴達木板塊北緣中、新元古代裂解成礦系統:樺樹溝柳溝峽鐵成礦組合; ( 3 )加里東期活動大陸邊緣成礦系統:早期島弧裂谷成礦組合(白銀廠清水溝銅及多金屬成礦組合) ,中、晚期島弧成礦組合(紅溝蛟龍掌銅及多金屬成礦組合) ,弧后擴張盆地成礦組合(豬咀啞巴九個泉石居里銅及多金屬成礦組合) ,與俯沖作用有關的巖漿熱液成礦組合(
塔爾溝小柳溝鎢成礦組合,樺樹溝柳溝峽銅成礦組合,大東溝吊大坂
鉛鋅成礦組合) ,洋殼殘片成礦組合(大道爾吉鉻成礦組合,玉石溝鉻成礦組合) ; ( 4 )碰撞造山成礦系統:前陸盆地成礦組合(天鹿銅成礦組合) ,陸內造山韌性剪切成礦組合(寒山鷹咀山金成礦組合) 。
But in 2003 an investigation by researchers at the university of lecce, near parabita, revealed that under the remaining patches of silver the piece was made of lead
但是到了2003年,帕拉比
塔附近的萊切大學的研究人員做的一項調查發現:這枚硬幣外表殘留了一些銀,其實是
鉛制的。
This hydra of towers, giant guardian of paris, with its four and twenty heads, always erect, with its monstrous haunches, loaded or scaled with slates, and all streaming with metallic reflections, terminated with wonderful effect the configuration of the town towards the west
這些連成一片的
塔樓,好像希臘神話中的多頭巨蛇,成了巴黎城的巨大守護神,始終昂著二十四個頭,端部屋面大得嚇人,或是
鉛皮的,或是石板為鱗的,全都閃爍著金屬的亮光,這巨蛇出人意外地一下子剎住新城西部的外形。
Galileo climbed the leaning tower, not because he needed to check how quickly a lead weight would fall, but because it was the only way to convince the sceptical merchants of pisa that gravity was not a purely theoretical construct
伽利略爬上比薩斜塔,並不是因為他要查驗鉛球下落速度的快慢,而是因為這是他要性將信將疑的比薩商人們證明,地心引力並不是純粹理論化的概念。