FANG Shufang
,
ZHANG Jian Panzhihua Institute of Iron and Steel Research
,
Panzhihua
,
China Laboratory of Physics
,
Panzhihua Institute of Iron and Steel Research
,
Dukou City
,
617000 Sichuan
,
China
金属学报(英文版)
The precipitation of Ti(V)N(C)in high-carbon steel PD_3 during thermomechanicol treatment at austenitic temperatures after deformation has been observed.The average size of Ti(V)N(C)particles may reduce with the increase of strain and the decrease of thermomechanical treatment temperature,and vise versa.The growth of Ti(V)N(C)particles at 920°C is found to be controlled by the interface reaction between precipitated particles and matrix.
关键词:
Ti(V)N(C)
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null
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null
稀土学报(英文版)
The domain structures in calcium-cerium fluorocarbonate mineral series from a rare earth mineral deposit within an aegirine alkali granite massif in Mianning County, Sichuan Province, China, were studied by means of transmission electron microscopy. Many categories of domain structures in this mineral series were observed and investigated, including the microtwin domains of parisite-6R(2) and B2S-6R, the antiphase domains of B2S-2H. The results show that the antiphase domains which are faults along crystal plane (0001) are formed by the displacement of crystal lattice in c * direction and the displacement is 0.471 nm. A new polytype (B4S2-3R) of regular mixed-layer structure with B4S2 type is found in the domain region of mixed-layer structure.
关键词:
rare earths;Ca-Ce fluorocarbonate mineral;domain structure;polytype
Yaozhong LAN
,
Rose W.Smith
材料科学技术（英文）
The gold sulfide concentrate with a high As content in Liangshan District, Sichuan Province, China, is a potentially important resource. This paper describes experiments of dearsenification of gold concentrate in a weakly reduced atmosphere in a rotary pipe furnace. The results showed that the optimal parameters were a temperature range of 650~700℃, 15%~16% CO2 of gas and a reaction time of 30~40 min. The removal rate of arsenic and sulfur was over 95% and 25%~28%, respectively. With further oxidization and roasting, residue sulfur in the roasted materials was dropped to below 4%, and the cyanide leaching recovery of gold was over 92%.
关键词:
Gold sulfide concentrate with a high As content
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null
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