Thermodynamics of integrated deoxidation of steel with a new alloy of aluminum-silicum-manganese (Al - Si - Mn)

The article considers the issue of using a complex alloy of aluminosilicomanganese as a deoxidizer. The value of the Wagner parameter of steel interaction - silicon, aluminum, manganese and concentration in the liquid, were associated with their activity in the metal. A certain consumption of the deoxidizer - aluminosilicomanganese per ton of liquid steel to improve the residual oxygen content in the metal. Possible generators of non-metallic inclusions are established

Thermodynamic-diagram analysis of Fe-Ni-C-O system

The paper presents the results of calculation of thermodynamic parameters of compounds formed between the system components. Complete thermodynamic-diagram analysis of the Fe-Ni-C-O system has been carried out taking into consideration the congruent compounds. The diagram of the four-component system Fe-Ni-C-O and mathematical model of its phase structure were constructed on the basis of full thermodynamic-diagram analysis and reference thermodynamic data

Large-scale laboratory tests for smelting medium-carbon ferromanganese using JEZDA manganese ore and SiMn17 silicomanganese fines

At present, Kazakhstan has established production of ferrosilicomanganese, while refined ferromanganese is not produced. This is primarily due to a lack of high quality feedstock, as well as a lack of theoretical and applied research into new production conditions. To address these issues we conducted large-scale laboratory tests on smelting medium-carbon ferromanganese by one-stage silicothermic method. As a result of these tests, medium-carbon ferromanganese meeting the standard grade with more than 80 % manganese content was produced

Thermodynamic diagram analysis (TDA) of MnO–CaO-Аl2O3-SiO2 and phase composition of slag in refined ferromanganese production

The research presents the calculations of the analytical expressions of the oxide system MnO-CaO-Al2O3-SiO2 and the phase compositions of the slags from the production of refined ferromanganese. It is determined that the system under consideration is divided into 19 elementary quasi-systems consisting of incongruently melting and congruently melting compounds. The sum of the relative volumes of the elementary tetrahedron of the MnO-CaOAl2O3-SiO2 system equals one (1,000000), which confirms the accuracy of the performed calculations. Quasi-volumes in the system MnO-CaO-Al2O3-SiO2, simulating the composition of the resulting slag in the process of metallothermic recovery of manganese concentrates are found

Research possibility of involvement Kazakhstani nickel ore in the metallurgical treatment

The work results of laboratory tests on the involvement of Kazakhstan oxidized (silicate) nickel ores with a 0,5 – 1 % nickel content into metallurgical proccessing to obtain nickel-containing cast iron with a 3 – 5 % nickel content. The tests include the study of nickel ores by nonisothermal kinetics, the study of the structure of the phase structure of nickel ores by petrography, the process of agglomeration of nickel ores and smelting of nickel-containing cast iron from the obtaining sinter using 2 types of reducing agents (coke and coal)

Research possibility of involvement Kazakhstani nickel ore in the metallurgical treatment

The work results of laboratory tests on the involvement of Kazakhstan oxidized (silicate) nickel ores with a 0,5 – 1 % nickel content into metallurgical proccessing to obtain nickel-containing cast iron with a 3 – 5 % nickel content. The tests include the study of nickel ores by nonisothermal kinetics, the study of the structure of the phase structure of nickel ores by petrography, the process of agglomeration of nickel ores and smelting of nickel-containing cast iron from the obtaining sinter using 2 types of reducing agents (coke and coal)

Study of softening temperatures of manganese ores in central Kazakhstan

The article presents the results of studying the temperatures of the beginning, end and temperature range of softening, samples of manganese ores in Central Kazakhstan. For the study, samples of manganese ores from the Zhezdinsky, Karazhal, Keregetas, and Western Kamys deposits were taken. The temperature interval for the softening of ores was determined by the method of isothermal heating on a specially assembled installation

Thermodynamic diagrammatic analysis (TDA) of the system Al-Si-Mn-Fe

The article presents the results of thermodynamic diagrammatic analysis of the Al-Si-Mn-Fe metal system as characterizing the final composition of the manganese-containing complex ferroalloy. By the method of thermodynamic diagrammatic analysis, the phase equilibrium of the Al-Si-Mn-Fe metal system was constructed, and the coexisting phases in the alloy were determined. Experimental samples of the aluminosilicomanganese alloy were studied on an Empyrean Malvern Panalytical X-ray diffractometer (XRD), where the presence of phases in the form of an intermetallic compound was determined - MnSi, Mn15Si26, Al2Fe3Si4, Al5Fe2, FeSi and structurally free silicon

Research of microstructure and phase composition of a new complex alloy – alumosilicomanganese (Al-Si-Mn)

The paper presents the results of a physicochemical study of a new complex alloy of alumosilicomanganese. The phase composition of the alloy was studied by X-ray diffraction (XRD) phase analysis on an Empyrean Malvern Panalytical X-ray diffractometer. Radiographs were processed and decoded using the Match! 3 software and the Full- Prof-2021 database. The HighScorePlus, Match! 3 and FullProf-2021 programs are based on the Rietveld method. The study of the microstructure of the alloy was carried out on a scanning electron microscope (SEM) of the JEOL - JSM7001F type. The chemical composition of the phases was determined using an Oxford INCA X-max 80 energy dispersive spectrometer (EDS) installed on a JEOL JSM-7001F scanning electron microscope

Research of microstructure and phase composition of a new complex alloy – alumosilicomanganese (Al-Si-Mn)

The paper presents the results of a physicochemical study of a new complex alloy of alumosilicomanganese. The phase composition of the alloy was studied by X-ray diffraction (XRD) phase analysis on an Empyrean Malvern Panalytical X-ray diffractometer. Radiographs were processed and decoded using the Match! 3 software and the Full- Prof-2021 database. The HighScorePlus, Match! 3 and FullProf-2021 programs are based on the Rietveld method. The study of the microstructure of the alloy was carried out on a scanning electron microscope (SEM) of the JEOL - JSM7001F type. The chemical composition of the phases was determined using an Oxford INCA X-max 80 energy dispersive spectrometer (EDS) installed on a JEOL JSM-7001F scanning electron microscope