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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... granularity of 74–89 μm, molar ratio of sodium carbonate to potash feldspar of 1.2:1, and roasting time of 80 min. The kinetics of potash feldspar roasting in the presence of sodium carbonate was described......
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leaching gold from residue were researched, such as leaching temperature and time, mineral granularity, NaCl concentration, H2SO4 concentration and flow rate of oxygen. The results show that copper removing ratio is more than 80% and gold leaching ratio is more than 98.23%, under the condition of 90% of mineral granularity 37 μm, leaching temperature 95 ℃, initial NaCl concentration 0.7 mol/L, initial......
on the vanadium leaching percent, such as reagent concentration, ratio of liquid to solid, temperature, leaching time, mineral granularity, were investigated. The results show that the vanadium leaching rate increases with the increase of reagent concentration, ratio of liquid to solid, temperature, leaching time and decreases with diminishment of the mineral granularity when the mineral granularity......
reactions result in the direct formation of amorphous powders with good filtering performance, of which morphology are regular spherical particles with larger granularity and smaller surface area... granularity distribution in the particle size range of 2-3 μm. Key words: α-Al2O3; ultrafine powder; homogeneous precipitation; anion; mutual compound 1 Introduction Ultrafine alumina, with excellent......
when the powder granularity was about 0.82 μm in the synthesis process. The atom ratio La:Zr:Ce of prepared LZ7C3 powder was very close to 10:7:3 which was the theory value of LZ7C3. The thermal......
content, the dolomite amount should be decreased, and the substitution of quicklime for dolomite caused better sintering results. The granularity of serpentine should be re-fined with a proper size smaller......
and the hydration reaction of the interface and the surface active center was increased by grinding. The granularity distributing of fly-ash trended towards optimization. The polar molecules or ions were......
when the powder granularity was about 0.82 μm in the synthesis process. The atom ratio La:Zr:Ce of prepared LZ7C3 powder was very close to 10:7:3 which was the theory value of LZ7C3. The thermal......
of JSM-5610LV and transmission electron microscope of H-600STEM/EDS were used to observe the microstructure of coated powders. Results show that treatment time, rotation speed, granularity ratio of TiB2 to BN... speed, granularity ratio of TiB2 to BN, mass of materials, material disposal in advance etc are main factors affecting the modification outcome. Table 1 presents several typical experiment, which......
