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Effect of mechanical activation on alkali leaching of chromite ore ZHANG Yang(张 洋)1, 2, ZHENG Shi-li(郑诗礼)1, DU Hao(杜 浩)1, XU Hong-bin(徐红彬)1, ZHANG Yi(张 懿)1 1. National Engineering Laboratory.... It is observed that the extraction ratio reaches 97% after leaching for 200 min when chromite ore is mechanically activated for 10 min, but only 34% if not activated. Mechanical activation can decrease......
- temperature alkali fusion process. Combined with downstream treatments such as sulfuric acid leaching and replacement by active copper powder, the flow sheet for comprehensive recovering metal values from CAS..., XU Zhi-peng, TIAN Qing-hua, FENG Qi-ming. Leaching behavior of metals from copper anode slime using an alkali fusion-leaching process [J]. Hydrometallurgy, 2015, 157: 9-12. [11] LIU Wei-feng, YANG......
of alkali concentration on leaching efficiency of metals 图4表明,在考察的碱浓度范围内,Al的浸出率略有增加,然后维持不变；Zn的浸出率随着碱浓度升高而逐渐增加,但NaOH浓度较低,碱浓度在1.0~1.5 mol/L时,Zn的浸出率较低；Pb,Sn,Cu浸出率很低,基本不参与反应.当碱浓度为1.25 mol/L时,Al得到最大程度的浸出,浸出率为...度为0.4 mL/min,浸出温度为50 ℃,浸出时间为120 min条件下,考察初始NaOH溶液浓度对氧化浸出过程金属浸出率的影响,实验结果如图7所示. 图7 碱浓度对金属浸出率的影响 Fig. 7 Effect of alkali concentration on leaching efficiency of metals 图7表明,随着初始碱浓度升高,金属浸出率均呈......
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Suspension calcination and alkali leaching of low-grade high-sulfur bauxite:Desulfurization, mineralogical evolution and desilicationHong-fei Wu1,2,Jun-qi Li1,2,Chao-yi Chen1,2,Fei-long Xia1,2,Zhen... transformation of pyrite follows the order FeS2 → Fe3O4 → Fe2O3, and the iron oxides and silica were converted into iron silicate. In the alkali-soluble desilication process, the optimum condition......
inserts itself into the silicate lattice, producing intermediate Mg2SiO4 and Na2MgSiO4 products. After the alkali leaching process, Mg2+ can be separated from SiO4 array, which can be released out of the silicate in the form of Mg(OH)2. Key words: MgSiO3; Raman spectroscopy; alkali melting; leaching reaction mechanism 我国硅镁型红土镍矿的特点是品位低,多伴生矿,且矿中镁,硅含量(质量分数)高达30%以上,易形成镁硅酸盐(如MgSiO3和Mg2SiO4).矿中各种金属离子相互......
detection for the alkali leaching was made by using Raman spectroscopy; XRD was used to analyze the structure of water leaching residue, to explore the reaction mechanism of NaOH decomposing Zn2SiO4... leaching process, Zn2+ can be separated from the SiO4 array, which can be released out of the silicate in the form of ZnO.Key words:Raman spectroscopy; Zn2SiO4; alkali melting; reaction mechanism......
; 文献标志码:A 文章编号:1672-7207(2016)07-2196-09 Dissolving behavior of silica of ocean polymetallic nodules in low mass fraction of alkali leaching... the comprehensive utilization, an alkali leaching pretreatment of ocean polymetallic nodules was studied. The effects of initial mass fraction of NaOH, leaching temperature, mass ratio of liquid......
