T.Wang 1)
,
T.H.Luo 1)
,
X.N.Zeng 1)
,
Q.Sha 1)
,
Z.H.Xiao 1) and C.S.Xu 2) 1) Wuhan University of Science & Technology
,
Wuhan 430081
,
China 2) Chongqing University
,
Chongqing 400044
,
China M
金属学报(英文版)
When smelting reduction of chromium and nickel concentrate with C Si Al as compound reductive is conducted in a plasma induction furnace, the alloying target value of 18%Cr and 9%Ni could be achieved in 20 minutes, the recovery rate of Cr and Ni would reach 82 85% and 95 98% respectively. Content of C could be limited within 0.3%. This paper also analysis the properties of electrochemical reaction between slag and molten metal.
关键词:
plasma
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null
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null
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null
Z. Zhou
,
Q.S. Gan and P.D. Ding College of Materials Science and Engineering
,
Chongqing University
,
Chongqing 400044
,
China
金属学报(英文版)
The reduction of the volumes of the silica glass during aluminum reactive penetration was observed experimentally. The liquid aluminum infiltrates easily into the cavities while the released silicon solves in the liquid aluminum, and Al/A1_2 O_3 composites could be obtained finally. The experimental result has shown that Al/A1_2 O_3 composites could transform into A1_2O_3 grains by oxygen in the cavities of Al/A1_2O_3 composites during longer penetration treatment. The formation of alumina is a sintering process, in which liquid aluminum, particulate alumina and oxygen play an important role. Tin nsformed process has shown that there is a relationship of σAl_2O_3
关键词:
aluminum
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null
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null
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null
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Sheng-fu ZHANG Liang-ying WEN Chen-guang BAI Gui-bao QIU Feng WANG
钢铁研究学报(英文版)
Primary distribution of coal gas in blast furnace raceway has an important effect on combustion of coke and pulverized coal injection, as well as whole ironmaking process. According to practical production parameters of No. 5 blast furnace in Chongqing iron & steel Co. LTD, the theoretical calculation model recommended by Nomura is adopted to determine penetration depth, height and width of raceway. Three-dimensional cold model of blast furnace raceway is established. Coal gas component concentration distribution of vertical section and cross section in blast furnace raceway is simulated using natural gas.
关键词:
blast furnace;raceway;coal gas;component concentration distribution
刘守平
,
周上祺
,
王佳眉
,
任勤
腐蚀科学与防护技术
用金相显微镜、扫描电镜、X射线衍射仪和X射线能谱仪对天然气井油管悬挂器腐蚀失效进行了检测分析，并对天然气井油管悬挂器用35CrMo钢进行了盐雾试验，结果表明，天然气中的水和CO2是引起腐蚀的主要介质，腐蚀产物主要是FeCO3，高速天然气冲刷和钢中的非金属夹杂加剧了腐蚀的速度.
CORROSION FAILURE ANALYSIS OF AN OIL TUBE USED IN NATURAL GAS WELL
LIU Shou-ping,ZHOU Shang-qi,WANG Jia-mei,REN Qin
Chongqing University
A failed oil tube used in natural gas well was examined by optical microscope,scanning electron microscope ,X-ray diffractometer and X-ray spectrometer.Corrosion behavior of 35CrMo steel samples of the oil tube were investigated by means of salt spray tests in the laboratory.The results show that CO2 and H2O are primary factors in the corrosion of oil tube.The corrosion product is FeCO3,non-metallic inclusions in the steel and erosion of natural gas fluid played an important role in accelerating the corrosion.
oil tube;
natural gas well；
35CrMo steel；
failure analysis；
corrosion
关键词:
悬挂器
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null
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null
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