scholarly journals Selective Complex Precipitation for Ferro-Chrome Separation From Electroplating Sludge Leaching Solution

2021 ◽  
Vol 9 ◽  
Author(s):  
Li Jinhui ◽  
Wang Ying ◽  
Wang Yudong ◽  
Gao Yang ◽  
Yang Yang ◽  
...  
Keyword(s):  
Particle Size ◽  
Benzoic Acid ◽  
Fine Particle ◽  
Molar Ratio ◽  
Complexing Agent ◽  
Optimal Conditions ◽  
H Nmr ◽  
Electroplating Sludge ◽  
Fine Particle Size ◽  
Leaching Solution

In this paper, aiming at the problem of chrome-iron separation in electroplating sludge, the separation of ferrochrome by complexation and precipitation with benzoic acid as complexing agent is achieved. The optimal conditions consisted of a 1: 3 molar ratio of Fe3+: C6H5COOH, a reaction temperature of 30°C, a final pH of 2.5 and a reaction time of 2 min. The separation rate of the iron was 97.38% and the rate of loss of chromium was only 3.59%. The ferrochromium separation products were analyzed by XRD, fluorescence spectroscopy, infrared spectroscopy and H NMR Spectroscopy in order to study the mechanism of precipitation. The results showed that benzoic acid preferentially forms a complex with iron and iron benzoate precipitates with an increase pH. The iron benzoate crystals have a fine particle size, settle rapidly and are easy to filter. The separation of Cr 3+/Fe3+ was successful using our methodology.

Hydrogen Generation by Hydrolysis of the Ball Milled Al-C-KCl Composite Powder in Distilled Water

2012 ◽  
Vol 519 ◽  
pp. 87-91 ◽  
Author(s):  
Xia Ni Huang ◽  
Zhang Han Wu ◽  
Ke Cao ◽  
Wen Zeng ◽  
Chun Ju Lv ◽  
...  
Keyword(s):  
Particle Size ◽  
Reaction Temperature ◽  
Fine Particle ◽  
Composite Powder ◽  
Hydrogen Generation ◽  
Aluminum Particle ◽  
Generation Rate ◽  
Composite Powders ◽  
Fine Particle Size ◽  
Hydrolysis Of

In the present investigation, the Al-C-KCl composite powders were prepared by a ball milling processing in an attempt to improve the hydrogen evolution capacity of aluminum in water. The results showed that the hydrogen generation reaction is affected by KCl amount, preparation processing, initial aluminum particle size and reaction temperature. Increasing KCl amount led to an increased hydrogen generation volume. The use of aluminum powder with a fine particle size could promote the aluminum hydrolysis reaction and get an increased hydrogen generation rate. The reaction temperature played an important role in hydrogen generation rate and the maximum hydrogen generation rate of 44.8 cm3 min-1g-1of Al was obtained at 75oC. The XRD results identified that the hydrolysis byproducts are bayerite (Al(OH)3) and boehmite (AlOOH).

Influence of fine particle size and concentration on the clogging of labyrinth emitters

2012 ◽  
Vol 31 (4) ◽  
pp. 545-555 ◽  
Author(s):  
Wenquan Niu ◽  
Lu Liu ◽  
Xue Chen
Keyword(s):  
Particle Size ◽  
Fine Particle ◽  
Fine Particle Size

Mercury Speciation and Fine Particle Size Distribution on Combustion of Chinese Coals

2012 ◽  
pp. 313-321
Author(s):  
Lei Zhang ◽  
Michael Daukoru ◽  
Sarah Torkamani ◽  
Shuxiao Wang ◽  
Jiming Hao ◽  
...  
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Fine Particle ◽  
Mercury Speciation ◽  
Fine Particle Size

Measuring Fine Particle Size with RGB Three Wavelength Bands Light Extinction Method

2015 ◽  
Vol 35 (7) ◽  
pp. 0712004 ◽  
Author(s):  
黎石竹 Li Shizhu ◽  
蔡小舒 Cai Xiaoshu ◽  
高伟 Gao Wei ◽  
刘浩 Liu Hao
Keyword(s):  
Particle Size ◽  
Fine Particle ◽  
Light Extinction ◽  
Fine Particle Size

scholarly journals Sea salt as a potential ocean mirror material

RSC Advances ◽  
2015 ◽  
Vol 5 (49) ◽  
pp. 38926-38930 ◽  
Author(s):  
T. Rowland ◽  
H. C. Hailes ◽  
J. R. G. Evans
Keyword(s):  
Particle Size ◽  
Fine Particle ◽  
Surface Albedo ◽  
Ostwald Ripening ◽  
Sea Salt ◽  
Fine Particle Size

The additives used to produce ocean foams also inhibit Ostwald ripening of seasalt producing very fine particle size and a reflectance of 77% so that seasalt can make a contribution to surface albedo.

Granulometric Characterization of Flotation Products

2012 ◽  
Vol 727-728 ◽  
pp. 1902-1907
Author(s):  
R.C. Santana ◽  
M.A. Santos ◽  
T.C.M. Santos ◽  
T.A.A. Souza ◽  
Carlos Henrique Ataíde ◽  
...  
Keyword(s):  
Particle Size ◽  
Fine Particle ◽  
Column Height ◽  
Particle Size Fractions ◽  
Granulometric Analysis ◽  
Fine Particle Size ◽  
Distribution Parameters ◽  
Parameter Values ◽  
Feed Samples

This work aimed on the granulometric characterization of flotation products and to analyze the effect of the variables (that were investigated in a flotation work) on the particle size distribution parameters. Besides to compare the parameter values of the granulometric analysis for the concentrate and tailing both results were compared with the parameter values of the flotation feed samples. The analyzed parameters showed lower values for the concentrate products as compared with the parameters for tailing and feed samples. For coarse and fine particle size fractions the column height was the variable that more influenced on the parameter values.

Effect of Quartz of Fine Particle Size on Porcelain Properties

2006 ◽  
Vol 530-531 ◽  
pp. 493-498 ◽  
Author(s):  
S.R. Bragança ◽  
C.P. Bergmann
Keyword(s):  
Mechanical Properties ◽  
Particle Size ◽  
Thermal Stress ◽  
Fine Particle ◽  
Quartz Particle ◽  
Shock Strength ◽  
Thermal Strength ◽  
Fine Particle Size ◽  
Technical Properties ◽  
The Cost

The mechanical properties of porcelain are strongly influenced by the generated thermal stress during processing. When quartz particle size is reduced its influence on the technical properties of ceramic products such as tiles and porcelains are changed. In this work, the properties of triaxial ceramics materials were evaluated using quartz of different particle size distribution. It was reported strong variations in mechanical strength and thermal shock strength. Although the cost of milling is increased to reduce quartz particle size, it can be compensated by its implicit advantages. The experimental results were very interesting showing the way that quartz particle size influences the analyzed properties. A significant improving in porcelain strength and thermal strength was obtained.

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