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Chemical Control of Hydrogen Sulphide During Drill Stem Tests
By Joseph U. Messenger
A method of applying ammonium hydroxide to a drill stem containing hydrogen sulphide gas and hydro-gen-sulphide-bearing oil and water so as to remove the hydrogen sulphide as ammonium sulphide is de-s
Jan 1, 1958
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Chemical Controls On The Bioavailability Of Cyanide - Introduction
By A. Redman
Aquatic organisms are sensitive to free cyanide (HCN) though the presence of certain metals that can form stable complexes and thereby reducing both the amount of bioavailable cyanide. Recent work ha
Jan 1, 2011
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Chemical Conversion Coating Used for Magnesium Electronic Housings
By I. Nakatsugawa
Chemical conversion coating is a process to create thin oxide/hydroxide film containing several inorganic/organic compounds by way of chemical deposition reaction. In case of the application to Mg mob
Jan 1, 2006
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Chemical Conversion Of Chalcopyrite To Copper Sulfides
By Hun-Joon Sohn
Chemical metathesis and electrochemical reductive conversion of chalcopyrite in the presence of cupric ions were studied in sulfuric acid solutions for temperatures up to 90°C. The process results in
Jan 1, 1984
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Chemical Corrosion Resistance Coating on Aluminum Substrate by the Sol-Gel Process
By Kazuyoshi Shimakage, Shinji Hirai, Kenji Wada
"An amorphous zirconium oxide coating was prepared by the sol-gel process using zirconium tetra-n-butoxide on the surface of aluminum to improve the corrosion resistance to salt, acid and alkaline att
Jan 1, 2000
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Chemical Cyanide Destruction Process Selection Based on Laboratory Testing
By R. Agius, A. Nacu
"Cyanide destruction technologies are implemented at gold and silver operations to comply with the International Cyanide Management Code and meet ever more stringent discharge limits. Currently, the m
Jan 1, 2017
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Chemical Demineralization Of Three Different Graphite Ores From Turkey
By Ö. Kaya
The removal of gangue minerals from three different graphite ores (Inebolu, Akdag?madeni and Çoraklidere) from Turkey by acid leaching was studied. Acid leaching experiments were applied to the flotat
Jan 1, 2009
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Chemical Destressing to Alleviate Rockbursts
By S. P. Singh
Destress blasting is commonly used in the mines to minimize the occurrence of rockbursts. The fracturing created by destressing in the vicinity of the face reduces the stress concentration by pushing
Jan 1, 1987
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Chemical Dewatering Aids for Mineral and Coal Slurries
By Kevin L. Purdy
Chemical dewatering aids for mineral slurries generally fall into two classes: surfactants and flocculants, which can be used separately or together. Current industrial use of both types of reagents i
Jan 1, 1986
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Chemical Engineer Views the Steel 1ndustry
By Charles Ramseyer
THE manufacture of iron and steel is one of the largest of our indus-tries; and in point of size of single plant and equipment certainly the biggest of all industries. By the general public it is gene
Jan 1, 1934
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Chemical Enhancement to Magnetic Separation for Effective Separation of Silicates from Titanium Phases at Finer Particle Size Fraction
By S A. Ravishankar
In heavy minerals separation, the titanium and iron oxide phases are separated from silicates in the coarser particle size range (80 - 150 mm) using magnetic and electrostatic separators. With the ong
Oct 5, 2011
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Chemical Enhancement to Magnetic Separation in Kaolin Beneficiation
The value creation with kaolin clays depends on removing the colored impurities which manifests in to higher brightnessone of the most sought after properties on applications such as paper coating, pa
Jan 1, 2014
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Chemical Enrichment of Low Grade Gold and Silver Concentrates
The Merrill-Crowe process for gold and silver recovery yields a low grade concentrate containing high levels of zinc and copper. External refining charges and high transport costs prompted the company
Jan 1, 1985
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Chemical Enrichment of Precious Metals in Iron Sulfides Using Microwave Energy
By Bowen Li, Matthew D. Andriese, Jiann-Yang Hwang, Zhiwei Peng
"Magnetic iron sulfide ore particles heat rapidly by microwave (MW) irradiation generating plasma during oxidation of surfaces. The high temperatures produced by the exothermic event decompose local p
Jan 1, 2013
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Chemical Environment in Australian Lead-Zinc Flotation Plant Pulps: I. PH, Redox Potentials, and Oxygen Concentrations
Up to 19 chemical parameters were studied in flotation pulps in six Australian lead-zinc concentrators with the aim of obtaining a better understanding of the nature of, and changes in, the chemical e
Jan 1, 1970
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Chemical Environment in Australian Lead-Zinc Flotation Plant Pulps: II. Collector Residuals, Metals in Solution, and Other Parameters
Up to 19 chemical parameters were studied in flotation pulps in six Australian lead-zinc concentrators with the aim of obtaining a better understanding of the nature of, and changes in, the chemical e
Jan 1, 1970
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Chemical Equilibrium Between Iron, Carbon, And Oxygen
By Matsubara, A.
THE problem of the equilibrium between iron, carbon, and oxygen was first carefully investigated by E. Baur and A. Glaessner,1 who determined the equilibrium conditions of the two reactions Fe304 + C
Jan 2, 1921
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Chemical Equilibrium of Manganese, Carbon, and Phosphorus in the Basic Open-hearth Process
By C. H. Jr. Herty
The results of a study of the open-hearth process from the physicochemical view-point are given. This study includes experimentation in small laboratory furnaces and in standard 100-ton furnaces. The
Jan 2, 1926
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Chemical Examination of Minerals
By William E. Ford, Edward Salisbury Dana
Examination in the Wet Way Examination by Means of the Blowpipe 479. The complete investigation of the chemical composition of a .mineral includes, first, the identification of the elements presen
Jan 1, 1922
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Chemical Extraction of Rare Earth Elements from Coal Ash
By X. Zhu, L. Chen, R. Guru, M. Peiravi, M. Mohanty, L. Ackah, B. Xu
"The overall goal of this study was to develop a suitable flowsheet to extract rare earth elements (REEs) from coal ash. Only the findings from the first part of this study is being reported at this t
Jan 1, 2017