Mechanical Properties and Mineralogical Composition of Potash Ore as a Factor in Selecting the Processing Method

Kuskova, Ya. V.; Lipnitsky, Nikita A.

doi:10.4028/www.scientific.net/msf.1022.17

Cited by 2 publications

(2 citation statements)

References 21 publications

(21 reference statements)

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“…An inverse relationship is observed between the precision k and the distance measured, that is, the greater the distance between the measurement points, the more accurate the determination of KL will be. According to analyzed data, to achieve a precision k = 0.048 for the refraction coefficient, the measurement points must be separated by at least 121 m, when measuring the vertical angle with a total station with a precision of 5 seconds [13][14].…”

Section: Local Refraction Coefficient Calculation In the Lateritic De...mentioning

confidence: 99%

Determination of the local refraction coefficient in Cuban lateritic mineral deposits

Ojeda Pardo,

Belette Fuentes,

Quiroz Cabascango

et al. 2023

J. Phys.: Conf. Ser.

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Much work has been done related to the characteristics of terrestrial refraction. However, very few have referred to the fluctuations of the refractive coefficient in the lower atmosphere in Cuban lateritic deposits. The objective of this research is to determine a local refraction coefficient in different climatic conditions and time of day, to increase the precision of the mineral volume calculation and to know its behavior and to analyze the influence of local refraction coefficient variations on the trigonometric leveling. The method of reciprocal simultaneous measurements of the vertical angle was applied to minimize the influence of the refractive coefficient and assess the errors committed. As results, a refraction coefficient of 0,17 was obtained, different from the 0,14 that is currently used, and that the Gaussian refraction coefficient +0,13 is not adequate to describe the refraction effects in the lower atmosphere. In conclusion, these results can be useful to better evaluate the role of refraction in topographic surveys at 1,5 m from the visual ray of the ground, in lateritic deposits on slopes greater than 20 %. The experiment on refraction showed a range of variation of KL between 0,134-0,179 near the ground on sunny days. This equates to vertical temperature gradients are 0,064-0,144 K/m during the day and 0,054 K/m after sunset.

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Section: Local Refraction Coefficient Calculation In the Lateritic De...mentioning

confidence: 99%

Determination of the local refraction coefficient in Cuban lateritic mineral deposits

Ojeda Pardo,

Belette Fuentes,

Quiroz Cabascango

et al. 2023

J. Phys.: Conf. Ser.

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“…Before using the chemical with scales 6, 7, /8, 9, 10, 10a and after using the chemical with scales 1, 2, 3 and 4. GOST 3443 -77R87, as well as the metal base classification: GOST 3443-77R87 [7].…”

Section: Metallographic and Chemical Composition Testsmentioning

confidence: 99%

Metallographic properties evaluation of the specimens obtained by the vibratory method (cast iron ISO 400-12)

Pardo

Figueredo

Fuentes

et al. 2022

J. Phys.: Conf. Ser.

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The objective of this research is to evaluate the metallographic properties to obtain cast iron with nodular spherical graphite ISO 400-12 by “In mold” modification using the vibratory method. To carry out the experiments, a model was prepared to reproduce the specimens used, according to the ASTM A0536-84R04 standard for the certification of the quality of cast iron with spherical nodular graphite. The pouring temperature levels were adapted to the wall thickness of the specimens. Vibration frequency (65 Hz, 70 Hz, 75 Hz), pouring temperature (1450°C and 1425°C) and mass of nodulizing alloy FeSiMg (NODULAN II) (189.98 g; 170.99 g; 151.99 g), calculated by the traditional method, were set as independent variables. The applied vibratory method caused changes in the morphology of the metal, as high spheroidization was obtained for all levels of modified alloy mass and smaller nodules (from 40 μm to 60 μm in diameter) were achieved. The tensile strength and relative elongation of the specimens obtained by the vibratory method were similar to the international standards for this type of casting and higher than the castings with nodular spherical graphite obtained under static conditions. Finally, the standard specimens (static method) and the specimens obtained by the vibratory method were obtained, and the metallographic and mechanical properties tests established by the international standards were carried out.

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Mechanical Properties and Mineralogical Composition of Potash Ore as a Factor in Selecting the Processing Method

Cited by 2 publications

References 21 publications

Determination of the local refraction coefficient in Cuban lateritic mineral deposits

Determination of the local refraction coefficient in Cuban lateritic mineral deposits

Metallographic properties evaluation of the specimens obtained by the vibratory method (cast iron ISO 400-12)

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