Beneficiation of Beni-Khaled Limestone Ore for Beneficial Industrial Uses
Mohamed Abuel Kasem Mohamed,
Galal Abd El Azim Ibrahim,
Ahmed Mohamed Ebrahim Rizk,
Mahmoud Mohamed Ahmed,
Ahmed Mohamed El Nozahi,
Nagui Aly Abdel-khalek,
Hasan Bakheat
Issue:
Volume 3, Issue 3, September 2018
Pages:
47-59
Received:
26 July 2018
Accepted:
16 August 2018
Published:
12 October 2018
Abstract: Limestone ore can be considered as an important source for mineral wealth in Egypt. Using wisdom for extracting these ores supports the national income of Egypt, Where, more than fifty million tons are produced per year. Most of this amount consumes in cement production and iron and steel industry. Beni-khaled quarries El-Menya Governorate, follows the Egyptian Iron and Steel Company, have more than 8 million tons of (-4+1) and (-1+0.0) cm accumulated in the site. Consequently, the main objective of this study is the beneficiation of this piled amount to maximize its beneficial industrial uses. Using crushing and grinding, dry magnetic separation, and calcination techniques produced an ore agrees with the needs of many industries, which increase the national income and solve the current environmental problems in this area.
Abstract: Limestone ore can be considered as an important source for mineral wealth in Egypt. Using wisdom for extracting these ores supports the national income of Egypt, Where, more than fifty million tons are produced per year. Most of this amount consumes in cement production and iron and steel industry. Beni-khaled quarries El-Menya Governorate, follows...
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Evolution of Cementite in Hypoeutectoid Steel Wire during Cold Work Hardening in Rolling Process
Wang Bojian,
Ge Xiaochen,
Xiao Qiang,
Liu Shifeng
Issue:
Volume 3, Issue 3, September 2018
Pages:
60-64
Received:
28 May 2018
Accepted:
5 July 2018
Published:
27 October 2018
Abstract: Using Φ1.80mm steel wire drawn from Φ6.5mm steel wire was drawn to Φ1.80mm as raw material. Using cold three-rolling process, we got flat wire which size was 0.75mm x 3.17mm by cold three-pass rolling process. Researches shown that 60 steel wire has good plastic deformation ability during cold work processing. The tensile strength and micro-hardness shows linear growth characteristics in the early first stage of cold rolling, then they have exponential growth characteristics in later rollings. That is because in the first rolling process the cementite eventually dissolved in large quantities as the ferrite is turned, deformed, refined and broken. The solution mechanism of cementite is the Gibbs-Thomson effect, i. e. interface energy mechanism.
Abstract: Using Φ1.80mm steel wire drawn from Φ6.5mm steel wire was drawn to Φ1.80mm as raw material. Using cold three-rolling process, we got flat wire which size was 0.75mm x 3.17mm by cold three-pass rolling process. Researches shown that 60 steel wire has good plastic deformation ability during cold work processing. The tensile strength and micro-hardnes...
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Determination of Silver by Fire Assay Gravimetry Combined with Mathmetic Correction
Sheng Jianlin,
Sun Yin,
Zhu Wujin,
Zeng Zongjie,
Ma Guoqiang,
He Hucheng,
He Mingdong
Issue:
Volume 3, Issue 3, September 2018
Pages:
65-75
Received:
20 July 2018
Accepted:
15 October 2018
Published:
29 November 2018
Abstract: The fire assay gravimetry is an old and classical method. It is one of most commonly used and most effective methods for the separation and analysis of precious metals due to strong representativeness, high accuracy and good stability. However, the fire assay gravimetry also has some disadvantages such as long analytical procedure and systemic lower analytical results (especially for silver). If the second or secondary assaying is use, the analytrcal procedure will be longer and the operation cost will be higher. Through the exploration and analysis of the test principle of smelting and ash blowing in the fire test analysis, under the premise of the control test analysis conditions, according to the merging silver content and lead buckle quality of one test gold, theoretically derived The mathematical model for correcting the amount of silver loss during smelting and ash blowing, and then the method of measuring the silver by the fire test weight method combined with the mathematical correction method, can completely eliminate the operation steps of the second test. The content of silver in three representative samples (including crude copper, copper concentrate and copper anode slime) was determined by the experimental method and fire assay-recovery correction method in the experiment. In the latter method, the lost silver in residue and cupel was determined by second fire assaying to obtain the corrected ralue of silver. The results showed that the relative difference between two methods were within ± 0.5%. The relative standard deviation (RSD) of crude copper (n = 11) and copper concentrate (n = 12) with proposed method was 0.9% and 1.2%. In addition, in this article, the optimum lead button mass with various samples and assay ingredient schemes was obtained by higher mathematics derivation, and the lead button mass in national related analysis standards was reasonably and scientifically reviewed.
Abstract: The fire assay gravimetry is an old and classical method. It is one of most commonly used and most effective methods for the separation and analysis of precious metals due to strong representativeness, high accuracy and good stability. However, the fire assay gravimetry also has some disadvantages such as long analytical procedure and systemic lowe...
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