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;硫酸化焙烧温度对镍钼浸出率的影响 Fig. 5 Effect of sulphation roasting temperature on leaching rates of metals 2.2.3 硫酸化焙烧时间对镍钼浸出率的影响 图6所示为硫酸化焙烧时间对镍钼浸出率的影响.实验条件如下:将156 g加钙氧化焙砂加入70 mL浓硫酸拌匀熟化2 h后,放进马弗炉250 ℃焙... molybdenum and nickel from Ni-Mo ore, the process of oxidation roasting with CaO, sulphation roasting and water leaching was proposed to extract molybdenum and nickel from the Ni-Mo ore. The process......
degree approaching to natural magnetite concentrate pellet fired at 1000 °C. Besides, two kinds of pellets displayed quite different roasting characteristics. When preheated at the same temperature... pellet, and it requires a roasting process at higher temperature for a longer time to reach the desired compressive strength for industrial production. Key words: artificial magnetite; pellets......
with a L/S ratio of 3 mL/g), sulphation roasting (51.9% sulfuric acid addition, roasting temperature 240 °C for 1 h), followed by leaching with the first stage hydrochloric acid leaching solution at 95 °C... hydrochloric acid addition at 65 °C for 30 min with a L/S ratio of 3 mL/g), sulphation roasting (51.9% sulfuric acid addition, roasting temperature 240 °C for 1 h), followed by leaching with the first......
feeding, dehydration, preheating decomposition, roasting and cooling, among which roasting temperature is the crucial operation parameter. When quality is good, low temperature is advantageous to increasing... is receivable. With the model prediction, the change tendency of the roasting temperature can be forecasted. If the prediction results showing the temperature may become high or low, the roasting......
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of sodium carbonate. The effects of roasting temperature, granularity, molar ratio of sodium carbonate to potash feldspar and roasting time on the silica extraction rate were investigated. Under the optimal roasting conditions, the silica extraction rate was 98%. The optimal conditions, determined using an orthogonal experiment, were found to be roasting temperature of 875 °C, potash feldspar......
process can overcome the disadvantages of low resource efficiency and the pollution of toxic residues in lime-based roasting process because there are no calcium-containing materials in this process... heterogeneous reaction processes. When the roasting temperature is as high as 1 373 K, the impurities of silicon, ferrate, aluminum and magnesium present in chromite ore can also react with Na2CO3 as well......
and iron in ZLR. Through sulfidation roasting of ZLR with pyrite, zinc and iron were converted into ZnS and Fe3O4. The effects of pyrite dosage, roasting temperature and roasting time on the sulfidation... in the treatment of ZLR to recover valuable metals. However, it consumes huge energy to provide high operating temperature (~1200 °C) [10]. In addition, the kiln coating in rotary kiln roasting also......
technology is an effective method and can be carried out simply in air at low roasting temperature with pervasive equipments. In this work, NaOH roasting was adopted to extract ZnO, SiO2 and PbO from zinc... oxide ore by alkali roasting method [J]. CIESC J, 2012, 63(2): 658–661. (in Chinese) [7] SHEN Xiao-yi, SUN Yi, SONG Ji-qiang, ZHAI Yu-chun. Low grade zinc ore by low temperature roasting using (NH4)2SO4......
Low Temperature Luminescence Properties of Tm3+ Doped Aluminate Phosphor Zhuang Weidong1,Huang Xiaowei1,Xia Tian1,Teng Xiaoming1,Zhao Chunlei1,Cui Xiangzhong1 (1.National Engineering Research... and UV emission spectra at 20, 50 and 100 K show that the low temperature luminescence intensities become weak gradually with the increasing of the temperature under 147 and 254 nm excitation......
