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ash [13]. Fly ash emerges as a by-product from the combustion of raw coal in thermal power plants. In recent years, mass waste fly ash has been causing serious environmental problems. So it is necessary...:100:60), the CTRN process includes the formation of ZrO2 due to the decomposition of zircon, the other decomposition product (SiO2) reacts with Fe2O3 and C to synthesize Fe3Si and FeSi. 2......
all the requirements above. Setting manganese oxide (ores) as a raw material while manganese sulfate as the end product may be a better solution for eliminating these drawbacks. A process using... in the latter stages of desulfurization processes, to eliminate the diffusion control caused by the product clogging in the pore. Of course, the temperature can’t be too high. Specific temperature......
ferrite are concentrated in the leached residue. The leached residue contains a significant part of zinc in the form of zinc ferrite [1]. Zinc ferrites is a by-product of zinc processing industry... rate may be usually controlled by reaction or by diffusion through the product layer or by the chemical reaction at the surface of the material. If the reaction is controlled by carbon gasification......
metal removal from dilute solutions. According to the result by BAILEY et al [4], an adsorbent can be considered low-cost if it’s abundant in nature, required little processing, and a by-product... at 80 °C for 6 h. Upon completion of the reaction, the product was washed with water and acetone in turn until the pH value of 7, and dried at 60 °C. The treated sawdust was immersed in a mixture......
. The optimal conditions of the whole technology were determined by experiments. The quality of α-Al2O3 product is up to the technical indicator of YS/T 274-1998 standard. Key words: fly ash; ammonium hydrogen sulfate; alumina; extraction 1 Introduction Fly ash is a fine ash separated from the flue gas of coal-fired power plant burning pulverized coal [1], and it is the main by-product from power plant......
size, higher concentration of ammonium bicarbonate and smaller solid-to-liquid ratio. The XRD and ICP-AES analyses show that the purity of product is high. The reaction kinetics with activation energy of 9.783 kJ/mol was analyzed by shrinking core model, and the whole transformation process is controlled by solid product layer diffusion. A semi-empirical kinetics equation was obtained to describe......
. Removal of pollutants from acid mine wastewater using metallurgical by-product slags[J]. Separation and Purification Technology, 2004, 40(1): 61-67. [2] 张子间. 酸性矿山废水处理技术研究进展[J]. 金属矿山, 2005(9): 10-12. ZHANG......
by-products[J]. Water Science and Technology, 1999, 40(9): 25-30. [9] Bougeard C M M, Goslan E H, Jefferson B, et al. Comparison of the disinfection by-product formation potential of treated waters exposed......
+ precipitation, revealing that Mg2+ actually reduced the Rb+ extraction yield. Therefore, it is necessary to remove Mg2+ and to raise pH value of the brine before Rb+/Cs+ extraction. The by-product Mg(OH)2 can......
determining the phase composition in the reduction roasting product of zinc ferrite. In the range of V(CO)/V(CO+CO2) ratio between 2.68% and 36.18%, zinc ferrite is preferentially decomposed into Fe3O4...+CO2) ratio 30%. Based on the above results, zinc leaching residue rich in zinc ferrite was roasted and the roasted product was leached by acid solution. It is found that zinc extraction rate in zinc......
