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Trans. Nonferrous Met. Soc. China 30(2020) 1980-1990 Enrichment and separation of iron minerals in gibbsitic bauxite residue based on reductive Bayer digestion Xiao-bin LI1,2, Zhao-yu ZHOU1,2, Yi-lin... and alumogoethite as well as the conversion of goethite to hematite in the reductive Bayer digestion. Processing Bauxite A with A/S of 25.41 can directly produce qualified iron concentrates (TFe>56......
Co. Ltd., Zibo 255052, China) Abstract: Periodical attenuation of particles, which interferes seriously with the normal alumina production of Bayer method, exists in the alumina production process of Bayer method. In order to solve this problem, the reasons of the periodical attenuation of particle size were analyzed by simulating the real production. The results show that the period of Al(OH)3......
-beneficiation [6]; 2) removal of S2- from Bayer liquor, such as through formation of ZnS by adding Zn(II) [3,7] or NaFeS2·2H2O by adding fresh iron hydroxides [8]; 3) removal of from Bayer liquor through...-sulfur bauxite lead to serious steel equipment corrosion and alumina product degradation via the Bayer process, owing to the reactions of sulfur and iron-containing phases in the sodium aluminate......
of diffusion dialysis technology was also inducted. Key words: diffusion dialysis; anion-exchange membrane; waste acid liquor; recovery  ...; Flow sheet of recover and reuse H2SO4 from stone coal leaching liquor 采用200 mm×400 mm扩散渗析器,组装40张国产DF120膜进行动态扩散渗析实验.结果表明,当水酸流量比为1?1,废酸流量为10 mL/min,温度控制在32 ℃左右时,硫酸的回收率达到80%,钒离子的截留率为96%,分离效果明显.一个年产1 000 t......
concentration of liquor can obviously affect the seeded precipitation of sodium aluminate solution. When the concentration of 1,2-Octanediol in the solution is less than 1.25 mmol/L, the inhibitory effect... concentration of liquor will greatly increase the inhibitory effect. Key words: sodium aluminate solution; 1,2-Octanediol; precipitation ratio  ......
铟,首先析出含羟基的盐In_2OHP_3O_(10)·9H_2O,随后转变为InH_3(PO_4)_2·4H_2O. 关键词:三聚磷酸钠; 沉铟; 加压浸出液; sodium tripolyphosphate; indium precipitation; pressure leaching liquor; [全文内容正在添加中] ......
草浆造纸黑液改性制备木质素酚醛树脂结合剂 刘德启1 (1.苏州大学理学院化学化工系 苏州215006) 摘要:以草浆造纸黑液为研究对象,通过对木质素的分离,提纯及对其酚羟基,羟甲基化改性,制备了木质素酚醛树脂结合剂.选择双氧水+稀土为催化剂,确定了其最佳的制备反应条件和试样成型工艺条件.所合成的木质素酚醛树脂结合剂,可以用于A12 O3等材料的常温成型,具有良好的粘度及和易性,提高了制品的热学,力学性能.同时可分别替代酚,醛原料的90%及85%,具有显著的经济与环保效益. 关键词:造纸黑液; 改性木质素酚醛树脂; 结合剂; 耐火材料; Pulp black liquor; Lignin-based phenolic; Binder; Refractories; [全文内容正在添加中] ......
sodium aluminate solutions or Bayer liquor. The methods are: 1) the removal of sulfur by means of wet air oxidation and 2) adding a desulfurizing agent. But by former this method problems... of the former process, the removal of sulfur is capable of separating divalent sulfur ions from the liquor by forming insoluble zinc sulfide and the latter concerns the removal of sulfur from the Bayer......
法国加尔当氧化铝厂D.T.Watt,张永注摘 要:<正> 加尔当(Gardanne)氧化铝厂于1892年投产,当时采用不经济的圣克莱戴维耳/彼施(?)(Sainte-Claire Deville/Pechiney)法进行生产.1896年至1902年拜耳(Bayer)曾在加尔当氧化铝厂工作过,但是在他到达以前,该厂已采用他的方法进行生产了.后来曾进行了某些改关键词:......