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leads to a strong peak in the DTA curve at 820.15 °C. Fig. 2 TG–DTA curves of potash feldspar roasted in presence of sodium carbonate To better understand the phase transformation of the mixture... size range. When compared with potash feldspar, it is apparent that the roasted residue particles are not uniform or porous and that their surface is rough as a result of the corrosion by sodium......
J. Cent. South Univ. Technol. (2011) 18: 925-931 DOI: 10.1007/s11771-011-0782-7 Statistical evaluation of five failure criteria for intact salt rock MA Lin-jian(马林建), LIU Xin-yu(刘新宇), FANG Qin(方秦... fits the test data and describes the mechanical behavior of the salt rock sequence (halite, bedded composite specimens and anhydrite interlayers). Full-scale comparison of all criteria for the three......
Thermal decomposition mechanism of low-content-fluorite Bayan Obo rare earth concentrate roasted with sodium carbonate and its consequent separation studyDan Zou1,Ji Chen1,Jiashi Hu2,Kai Li1,3,Deqian...(BORC) and sodium carbonate(Na2CO3) roasted at different temperatures with weight ratio of 100:20 were studied in detail in our study.The aim of our study is to reveal the nature of roasting reaction......
Thermal decomposition mechanism of low-content-fluorite Bayan Obo rare earth concentrate roasted with sodium carbonate and its consequent separation studyDan Zou1,Ji Chen1,Jiashi Hu2,Kai Li1,3,Deqian...(BORC) and sodium carbonate(Na2CO3) roasted at different temperatures with weight ratio of 100:20 were studied in detail in our study.The aim of our study is to reveal the nature of roasting reaction......
CRYSTALLIZATION OF SODIUM TUNGSTEN BRONZE USING ELECTROLYSIS WITHREVERSE CURRENT＋Huang Huan1; Yang Songqing1; Tang Shu2(1. Institute of Metallurgical Physicochemistry and Materials, Central South University of Technology, Changsha, 410083, China; 2. Experimental Center, Hunan Normal University, Changsha, 410006, China)Abstract:Utilizing the technique of electrolysis with reverse current,sodium......
with purity of 99.6% is obtained by calcining the crystals at 560 °C for 2 h. Key words: chromium-containing vanadate solution; calcium salt precipitating vanadium; sodium bicarbonate leaching; ammonium salt..., by ball milling, Ca(OH)2 is added into the leaching solution of the vanadium slag roasted with sodium to make V selectively precipitated. After filtering, PbCO3 is added into V precipitated solution......
J. Cent. South Univ. Technol. (2008) 15: 198-203 DOI: 10.1007/s11771-008-0038-3 Simulation of thermal and sodium expansion stress in aluminum reduction cells LI Jie(李 劼), WU Yu-yun(伍玉云), LAI... were built up for analysis of stress field in the lining of aluminum electrolysis cells. Distribution of sodium concentration in cathode carbon blocks was calculated by one FE model of a cathode......
码:A Effects of sodium-salt on Al-Fe separation by reduction roasting for high-aluminum content limonite JIANG Tao, LIU Mu-dan, LI Guang-hui, SUN Na, ZENG Jing-hua, QIU Guan-zhou (School of Minerals... reaches 93.64% when the roasted products are treated by magnetic-separation. The XRD, EDX and microstructure results indicate that, when limonite is reduced without sodium salts, the iron oxides......
. However, these methods of desulfurization in sodium aluminate solution have insurmountable disadvantages, for instance, expensiveness of barium salt and zinc oxide, low desulfurization rate... to the release of CO2 in the reaction. Therefore, the relative yield (Q) of sodium ferrite, representing its content in roasted product, can be calculated according to the following equation: ......
content of 8.16% (mass fraction) was studied by reduction roasting with addition of sodium salt followed by magnetic-separation. The results show that metallic iron powder with total iron grade of 91.00... during the magnetic separation, then Al-Fe separation is realized. Key words: limonite ores; sodium salt; aluminum; reduction roasting; magnetic separation ......
