Miscellaneous Measurement Techniques

Dulski, Thomas R.

doi:10.1201/9780203735299-9

Cited by 2 publications

(4 citation statements)

References 1 publication

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“…All used reagents are pure and analytical grade (“Reachim” Ltd., Sigma Aldrich). The concentrations of nickel, aluminum, and OH-ions were determined according to standard titrimetrical methods (Dulski, 2017). Nickel in solid phases was determined by dimethylglyoxime after masking the aluminum with triethanolamine.…”

Section: Methodsmentioning

confidence: 99%

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An investigation on the synthesis of nickel aluminate

Frolovа¹

2019

PRT

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Purpose The purpose of this paper is to study the process of coprecipitation of polyhydroxocomplexes of nickel and aluminum from solutions of nickel (Ni) (II) sulfate and aluminum (Al) (III) sulfate with caustic soda and to study the conversion process to nickel aluminate and to check its properties. Design/methodology/approach For the thermodynamic analysis of the precipitation process, the software package MEDUSA was used. The dependences of the electrical conductivity, pH and residual concentrations as functions of the OH/Me ratio were obtained. Using X-ray phase analysis, spectroscopic analysis and derivatographic analysis, the properties of the products obtained were studied. The effects of OH/Me ratio and molar ratio cation of reagents on the physicochemical properties of the products were analyzed. Findings The paper deals with the results of theoretical and experimental research on the synthesis pigments of blue and green colors based on Ni-Al spinel. The influence of the molar ratio cation content on optical and color characterise of pigments were studied. Originality/value The original complex method of studying the processes of co-precipitation of cations in the form of hydroxides is proposed. pH precipitation of aluminum hydroxide and nickel are different. It is interesting to study their co-precipitation. The resulting single-phase product is a precursor of nickel aluminate over a wide range of cation ratios. The dependences of the electrical conductivity, pH and residual concentrations as functions of the OH/Me ratio were obtained.

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Section: Methodsmentioning

confidence: 99%

“…Nickel in solid phases was determined by dimethylglyoxime after masking the aluminum with triethanolamine. Aluminum was determined by spectrophotmetrical method (Dulski, 2017).…”

Section: Methodsmentioning

confidence: 99%

An investigation on the synthesis of nickel aluminate

Frolovа¹

2019

PRT

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“…The emission rays (spectrum rays) that are released when the electrons return to their initial orbit are measured to identify the elements present in the sample, since each atom has a characteristic emission ray [8,10]. Because of these characteristics, the OES is widely used as a technique for chemical analysis of steel [11].…”

Section: Inspection and Measurement Of Scrap Qualitymentioning

confidence: 99%

“…To identify residual elements in steel, it is necessary to know the limits and the accuracy of the equipment used to perform the chemical analysis, since the concentration of some residual elements can be lower than 100 ppm (0.01%) [11]. The OES accuracy is reduced as the element concentration reaches the limit of detection (LOD) [8].…”

Section: Inspection and Measurement Of Scrap Qualitymentioning

confidence: 99%

Monitoring of less-common residual elements in scrap feeds for EAF steelmaking

Miranda

Assis

Brooks

et al. 2019

Ironmaking & Steelmaking

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The steel scrap quality is classified according to the amount of residual elements. However, there is a limited analysis of some of the less common residual elements such as antimony (Sb), tungsten (W), cobalt (Co), nickel (Ni) and molybdenum (Mo) mixed with steel scrap received by steel plants. This paper reports a historical analysis of these elements in the steel compositions from two steel plants, located in different regions, during 2011 to 2018, analysing around 21000 heats. The concentration of W and Sb dropped by 0.002%, due to the increasing recovery of non-ferrous metals from mixed scrap. It was found that the calibration and maintenance of the spectrometer used to analysis had a direct impact on the results. The presence of Sb, W and Co in the steel indicates contamination from other materials, since 80% of the use of these elements is in applications associated with non-ferrous materials. This is the first analysis of these elements in steel scrap reported the literature and the conclusion of the study is that more attention should be paid to monitor less common residuals elements, because analysis of these elements can provide information about the quality of the metal scrap.

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Miscellaneous Measurement Techniques

Cited by 2 publications

References 1 publication

An investigation on the synthesis of nickel aluminate

An investigation on the synthesis of nickel aluminate

Monitoring of less-common residual elements in scrap feeds for EAF steelmaking

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