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A novel method to produce potassium chromate from carbon ferrochromeHU Guo-rong(胡国荣), WANG Jia-liang(王家良), PENG Zhong-dong(彭忠东), DU Ke(杜柯) (School of Metallurgy and Environment, Central South...%. Therefore, it can be easily recovered to produce sponge iron, realizing zero-emission of chromium residue.Key words:carbon ferrochrome; potassium chromate; two-stage roasting; chromium residue; zero......
diagrams of the Cr-H2O and Fe-H2O systems, IR spectra and XRD pattern, the existence forms of iron in the potassium chromate were analyzed, and the methods of iron removal were investigated. The results show that the existence forms of iron in the potassium chromate are potassium ferrate. These results are instructive and helpful to the hydrometallurgical processing of chromite ore. Key words......
and instructive to industrial application. Key words: viscosity; density; potassium chromate; potassium hydroxide; mixed electrolytes... mm. The chemical reagents potassium chromate (K2CrO4) and potassium hydroxide (KOH) used in this work were AR grade and GR grade, respectively, and used directly without further purification......
was higher in sodium than in potassium liquors. In these experiments, the presence of chromate in the solution was the only difference among solutions. For some yet unknown reason, the induction period...Trans. Nonferrous Met. Soc. China 24(2014) 3356-3365 Crystallization behaviors of bayerite from sodium chromate alkali solutions Guang-ye WEI1,2, Jing-kui QU1, Yu-dong ZHENG2, Tao QI1, Qiang GUO1......
·SiO2, respectively. Key words: chromite ore; oxidative roasting; thermodynamics; sodium chromate 1 Introduction Soda-ash roasting of the chromite mineral is almost the unique method used worldwide for the production of water soluble sodium chromate [1]. The soda-ash roasting process is divided into lime-based roasting process and lime-free roasting process according to the composition of filler......
of the American Chemical Society, 1953, 75: 6180-6186. [11] WANG Ji-yan, WANG Fu-an, ZHANG Peng. Densities and viscosities of chromium trioxide + potassium chromate +potassium dichromate + water from...)04-1227-06 Acidification process of sodium chromate solution LIU Gui-hua, ZHANG Yu-feng, ZHOU Qiu-sheng, LI Xiao-bin, PENG Zhi-hong (School of Metallurgical Science and Engineering, Central South......
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of a known mass of aluminum hydroxide. After complete dissolution, the solution was filtered twice through a caustic-resistant 0.22 μm Teflon membrane. Known masses of potassium chromate and potassium... values and morphology of the particles compared with those reported in the literatures [8-10]. Because of the low concentration of the potassium aluminate in the synthetic chromate leaching solution......
Structure and Growth Mechanism of Lanthanum Chromate Fu Guifu1,Ao Qing1,Liu Weiming1,SUN Liangcheng1,Li Shengli1,Ling Ziyu1 (1.Department of Materials Science and Engineering, Shandong University, Jinan 250061, China;2.Baotou Rare Earths Institute, Baotou 014010, China) Abstract:The unit cell of lanthanum chromate was constructed by calculating equivalent points. By means of calculation......
Investigation of High Molar Ratio Potassium Solution Used in Zinc-Rich Coatings LI Sheng1,YAN Rui1,WU Hang1 (1.Surface Engineering Research Institute, Beijing 100072, China) 摘要:High molar ratio potassium silicate solution used in zinc-rich water-base coatings was prepared by adding the nanosize SiO2 to the low molar ratio potassium silicate solution, and its microstructure was investigated......