Low-carbon Ferrochrome Research Articles

Preliminary study of the technology of vacuum-thermal production of low-carbon ferrochrome

Preliminary study of the technology of vacuum-thermal production of low-carbon ferrochrome

Құрамында бор бар силикохромды қолдану арқылы төмен көміртекті феррохромды балқыту процесін термодинамикалық модельдеу

The TERRA program for calculating multicomponent heterogeneous systems, based on the principle of maximum entropy, was used to study systems with a complex chemical composition, in which the task of numerical modeling is chemical and phase transformations play an important role. The effect of charge composition and temperature on the chemical and phase composition of melting products was studied, the degree of transition of charge elements into metal was determined, and optimal conditions for obtaining the alloy were found. The thermodynamic analysis of the ferrochromium production process showed that in order to approach the real process of low-carbon ferrochromium smelting, it is necessary to take into account the degree of silicon use by introducing oxygen into the working fluid to oxidize excess silicon according to the calculation. On the basis of the performed thermodynamic analysis, it is also shown that the choice of the process temperature (1750-1800°C and more) is associated with the kinetic conditions of melting, the melting temperature of the formed metal and slag. Therefore, it is expected that the presence of boron oxide, in addition to stabilizing slag from decomposition, will reduce its melting point, and the early appearance of the liquid phase due to low-temperature boron phases will ensure a shift in the reduction reactions of chromium with silicon to the low-temperature region. All these provisions will be implemented during high-temperature experimental work on the development of technological parameters.

Effect of ferrochromium (FeCr) and ferroniobium (FeNb) alloys on inclusion and precipitate characteristics in austenitic stainless steels

Lab-scale alloying experiments were carried out by first adding commercial low-carbon ferrochrome (LCFeCr) alloys and then adding ferroniobium (FeNb) alloys in 316-grade austenitic stainless steel in this study. The inclusion and precipitation characteristics in LCFeCr and FeNb were evaluated as well as in a 316 austenitic stainless steel after the alloy additions by using two- and three-dimensional characterization methods in combination with thermodynamic calculations. The results showed that MnCr2O4 spinels and pure Al2O3 were the main types of inclusions in LCFeCr alloys, while pure TiOx, Al2O3 inclusions and complex TiOx-Al2O3 aggregates were mainly found in FeNb alloys. After the addition of LCFeCr alloy to the steel, the SiO2 contents in liquid inclusions decreased to some extent, while more inclusions containing higher MnO contents were observed. Some MnCr2O4 spinel inclusions can be reduced by Si in steel and form liquid inclusions. Some MnCr2O4 spinel and Al2O3 inclusions from LCFeCr alloy can remain in the steel melt, which decreased the steel cleanliness. After the addition of FeNb alloy, pure TiOx inclusions present in this alloy can hardly be found in the steel melt. The inclusion types in steel were not changed so much but high Nb-containing phases were found around the inclusions and coarse Laves phases were formed in the matrix. Overall, this work aims to understand the impurity particle behavior during the alloying process when using ferroalloys to produce high-performance stainless steels.

Study on Adaptive Parameter Internal Mode Control Method for Argon–Oxygen Refining Ferrochrome Alloy

In order to determine a way to be able to shorten the smelting time of low-carbon ferrochrome alloys and to strengthen the temperature control capability of the AOD converter during the smelting process, this article establishes a mechanism model of the rate of oxygen supply and carbon content change in the smelting process as well as the temperature of the reaction fluid in the converter. The physical and chemical reactions of the smelting process and the actual smelting data are used as the basis. The temperature and carbon content in the smelting converter are considered as the output quantity and the rate of oxygen supply is considered as the input quantity. An expert internal model control framework is built. In addition, an adaptive parameter adjustment mechanism is added to the control framework, taking into account data such as the maximum gas supply rate and the maximum limiting temperature of the actual production process. This method improves the smelting speed and smelting accuracy compared to the general internal mode control method. Finally, according to this method, with the use of the built low-carbon ferrochrome alloy centralized control system for smelting, the system shortens the smelting time by 12.79% compared with the general method and controls the converter temperature below 1950 K, which achieves the expected goal according to the simulation and actual smelting results.

Preparation and Hydration Mechanisms of Low Carbon Ferrochrome Slag-Granulated Blast Furnace Slag Composite Cementitious Materials

Low carbon ferrochrome slag (LCFS) is the metallurgical waste slag from the carbon ferrochrome alloy smelting process. Compared with high carbon ferrochrome slag, LCFS has great potential as cementitious material; the chemical compositions of the two types of slag are quite different. In this research, composite cementitious materials are prepared which use low carbon ferrochrome slag and granulated blast furnace slag (GBFS) as the main raw material. Steel slag mud (SSM) and flue gas desulfurization gypsum (FGDG) are used as the activator. In order to find the variety rule of compressive strength on the composite cementitious materials, a three-factor three-level Box-Behnken design is used to discuss the following independent variables: LCFS content, GBFS content, and water-binder ratio. Moreover, the hydration characteristics of the LCFS-GBFS composite cementitious materials is studied in this paper in terms of hydration product, micromorphology, and hydration degree, based on multi-technical microstructural characterizations. The results show that the compressive strength of the LCFS-GBFS composite cementitious materials is significantly affected by single factors and the interaction of two factors. The mechanical property of the mortar samples at 3, 7, and 28 days are 26.6, 35.3, and 42.7 MPa, respectively, when the LCFS-GBFS-SSM-FGDG ratio is 3:5:1:1 and the water-binder ratio is 0.3. The hydration products of LCFS-GBFS composite cementitious materials are mainly amorphous gels (C-S-H gel), ettringite, and Ca(OH)2. With the increase of LCFS content, more hydration products are generated, and the microstructure of the cementitious system becomes more compact, which contributes to the compressive strength. The results of this research can provide a preliminary theoretical foundation for the development of LCFS-GBFS composite cementitious materials and promote the feasibility of its application in the construction industry. Deep hydration mechanism analysis and engineering applications should be studied in the future.

Influence of ferrochromium type on micro and macro tribology behavior of copper metal matrix composites

Ferrochromium, an important emerging abrasion component, is added to Cu metal matrix composites (Cu-MMCs) to enhance the high-energy braking properties of such composites. This study examined the microstructures, interfacial characteristics, and micro-tribology behaviors of two kinds of ferrochromium, and their effects on the braking performance of Cu-MMCs. The high-carbon ferrochromium (HCF) with higher hardness, consisting of (Cr,Fe)7C3 and (Cr,Fe)23C6-CrFe phases, formed a poor mechanical-diffusion mixed interface with the matrix and exhibited a low coefficient of friction (COF) in micro-friction tests. By cracking or crushing of HCFs, as well as third-body wear debris formed by HCFs, the COF in macro-friction tests was increased, helping Cu-MMCs maintain their braking performance at medium and high breaking energy densities (BEDs). The extra low-carbon ferrochromium (ELCF), consisting of a CrFe phase, generated a diffusion interface with the matrix, exhibited a greater COF, promoted the formation of a tribo-layer at high BED, and provided better wear resistance for Cu-MMCs. The wear mechanisms changed from plowing to severe plastic deformation-induced delamination and oxidation-induced delamination for Cu-MMCs with ELCF and HCF, respectively.

THE USE OF METALLURGICAL CALCIUM, ALUMINUM AND IRON-CONTAINING SLAGS IN THE PRODUCTION OF HEAT-RESISTANT CONCRETE BASED ON ORTHOPHOSPHORIC ACID

The objects of research are: ferropyl from self-disintegrating slags of low-carbon ferrochrome, slag from smelting without carbon ferrochrome, ferrite-calcium slag and heat-resistant concrete. Due to the fact that the Russian budget does not provide funding for geological exploration and other survey work to determine the quantity and quality of raw materials for the production of construction products, it is necessary to conduct research on the use of technogenic raw materials as raw materials. The use of technogenic raw materials in the production of construction materials practically reduces many costs not only for geological exploration, but also for the arrangement, including the operation of quarries, to zero. Metallurgical industries (non-ferrous and ferrous) in Russia emit a third of all available emissions from industrial enterprises into the atmosphere, while the volume of metallurgy products (non-ferrous and ferrous) is only 17 % of the total domestic industry. In this work, metallurgical waste was used for the production of heat-resistant concrete: as a calcium-containing component, ferropyl from self-disintegrating slags of low-carbon ferrochrome, as an iron-containing component, ferrite-calcium slag, waste from the processing of copper-zinc concentrates, which is a light yellow material slowly cooled to complete scattering, resembling fine sand, and as an aluminum-containing slag from smelting without carbon ferrochrome. Studies have shown that ferrite-calcium slag contains ferrous iron oxide (fayalite) reacts quickly with Н2РO4 and heats the mixture to the required temperature for the appearance of astringent properties. Studies have shown that thanks to the use of orthophosphoric acid as a binder, it is possible to dispose of up to 85 % of non-ferrous metallurgy waste and at the same time obtain heat-resistant concretes with high physical and mechanical properties.

Crystallization characteristics, microstructural evolution, and Cr migration mechanism of glass-ceramics synthesized entirely from low-carbon ferrochromium slag and waste glass

The disposal and large-scale reutilization of industrial solid waste in construction materials have been gaining considerable interest. Herein, the synthesis of glass-ceramics from low-carbon ferrochromium slag (FCS) and waste glass is reported. The crystallization characteristics, microstructural evolution, and Cr migration mechanisms of the glass-ceramics were investigated through offline quenching experiments. The physical properties and Cr ion leaching performance were tested and evaluated. As the low-carbon FCS content was increased, glass network depolymerization was promoted and the crystallization ability was effectively improved. When 50 wt% low-carbon FCS was added, the compressive strength and Vickers hardness of the glass-ceramics reached maximum values of 160.26 MPa and 736 Hv, respectively. Simultaneously, the dominant crystalline phase in glass-ceramics was transformed from diopside and wollastonite into gehlenite when the low-carbon FCS content was further increased to 60 wt%, thereby reducing the mechanical properties. Cr2O3 primarily existed as a [CrO6] octahedron and Cr-containing spinel in the parent glass, resulting in composition segregation. On combining the growth orientation of diopside and spinel, the resulting specific crystal coating structure improved the Cr ion leaching performance. Considering the physical properties and risk of Cr leaching, the optimal FCS content in glass-ceramics is 40–50 wt%. These findings indicate that the production of glass-ceramics from low-carbon FCS and waste glass is an effective and environment-friendly method for co-utilizing these two solid wastes.

Effect of Cr2O3 on Crystallization of Diopside Glass–Ceramics

CaO–MgO–Al2O3–SiO2–Cr2O3 diopside glass–ceramics were prepared from blast furnace slag, low-carbon ferrochromium alloy slag, and quartz sand by the melting method. The prepared glass–ceramics were characterized by differential thermal analysis (DTA), X-ray diffraction (XRD),scanning electron microscopy (SEM), energy-dispersive spectrometer (EDS), and X-ray photoelectron spectroscopy (XPS). The effect of Cr2O3, a nucleating agent, in the crystallization process of diopside glass–ceramics was studied. The results show that chromium is present in glass–ceramics as Cr3+ and Cr6+, and Cr3+ accounts for more than 80% of the chromium contents. When the mass percentage of Cr2O3 in glass–ceramics is less than 1.60%, a small amount of diopside phase is precipitated during heat treatment, and Cr3+ is dispersed in the diopside phase. When the mass percentage of Cr2O3 reaches or exceeds 1.60%, Cr3+ preferentially forms the magnesia chrome spinel phase, which further induces the in situ growth of diopside. The leaching concentration of chromium meets the Chinese national standard, indicating that diopside glass–ceramics can effectively solidify the heavy metal chromium, and this fact makes the application of glass–ceramics feasible.

TECHNOLOGIES OF REFINING FEROCHROME IN GKR CONVERTER

Investigated in a 1 ton gas-oxygen refining converter (GCR) are technologies for refining carbon from high-carbon ferrochrome in order to obtain high-demand medium- and low-carbon ferrochrome.

Optimal System for Improved Internal Model Control of Argon-Oxygen Decarburization Process Based on the Piecewise Linear Model and Time Constant of Filter Optimization

This paper presents an improved internal model control system to raise the efficiency of refining low-carbon ferrochrome. This control system comprises of a piecewise linearized transfer function and an improved internal model controller based on optimized time constant of the filter. The control system is mainly used to control the oxygen supply rate during the argon-oxygen refining for controlling the smelting temperature. The regulatory performance and servo of two closed-loop control schemes are compared between the improved internal model controller based on the optimized filter time 0000-0002-7606-6546and the internal model controller based on the fixed filter time constant. The simulation analysis shows that the piecewise linearized model and the optimization of the time constant of the filter improves the response time, stability, and anti-interference ability of the controller. Then, the proposed improved internal model controller is used to adjust the gas supply flow in 5 ton AOD furnace to control the smelting temperature. Ten production tests performed the effectiveness of the controlling refining optimal system. The analysis of the experimental data shows that the improved internal model control system can shorten the melting time and improve the melting efficiency. Thus, the application of the improved internal model control system in low-carbon ferrochrome refining is an interesting potential direction for future research.

The Study of the Characteristics and Possibilities of Using Slags and Dusts from Ferrochrome Production

The analysis of waste generation from the production of chromium-containing ferroalloys in the Russian Federation is carried out.Representative samples of slags and dusts were selected from the production of chromium ferroalloys, depending on the grade composition and the technological equipment used.The chemical and phase compositions of the samples were studied.The fractional composition of self-disintegrating slags and dusts was studied by the method of dynamic analysis of digital images.Physicochemical characteristics were experimentally investigated: density, melting points, viscosity of selected samples. Wastes from the production of various grades of chromium ferroalloys have their own specific compositions and properties. The melting temperature range of the studied samples varies in a wide range and differs significantly for each of them. Dusts from gas cleaning of high-carbon ferrochrome have the lowest melting points (1460 - 1480 oС). Dust from cyclones and low-carbon ferrochrome gas cleaning have the highest melting temperature ranges reaching 1790 oС. According to its characteristics, waste of chrome production can be used in small quantities (up to 10%) as additives in the production of ferroalloys of other grades. Waste from chromium production can be more efficiently used in the production of refractory products and materials for ferrous metallurgy.

Effect of LCFeCr Alloy Additions on the Non-metallic Inclusion Characteristics in Ti-Containing Ferritic Stainless Steel

The influence of commercial low carbon ferrochromium (LCFeCr) additions on the inclusion characteristics in Ti-containing ferritic stainless steel was studied by laboratory experiment in this work. The inclusions in steel before and after the FeCr alloy additions were investigated through systematic samplings and microscopy investigations of the liquid steel. Different types of inclusions in the FeCr alloy and steel were detected and the evolution of the inclusion characteristics (e.g., composition, size, morphology, and number density) were investigated. The results showed that the Ti content decreased after the FeCr alloy additions. Furthermore, MnCr2O4 spinel inclusions originating from the FeCr alloys transformed into Ti2O3–Cr2O3-based liquid inclusions and Ti2O3-rich solid inclusions. They were formed due to the reactions between MnCr2O4 and TiN inclusions or dissolved Ti in molten steel. The ratio of Ti/Al in the steel melt has a direct influence on the evolution of inclusions from thermodynamic calculations. The addition of FeCr alloys caused an increased number density of these Ti2O3-containing inclusions and TiN inclusions up to 8 minutes from the time of alloy addition. The increased Cr content from 16 to 24 mass pct due to the FeCr additions can increase the critical N content to form TiN inclusions at a specific Ti content. Overall, this study has contributed to the understanding the behavior of inclusions from LCFeCr alloy during the alloying process in Ti-containing steel.

Interfacial Phenomena and Inclusion Formation Behavior at Early Melting Stages of HCFeCr and LCFeCr Alloys in Liquid Iron

Chromium is normally added to liquid alloy in the form of different grades of ferrochromium (FeCr) alloys for the requirement of different alloy grades, such as stainless steels, high Cr cast iron, etc.. In this work, inclusions in two commercially produced alloys, i.e., high-carbon ferrochromium (HCFeCr) and low-carbon ferrochromium (LCFeCr) alloys, were investigated. The FeCr alloy/liquid iron interactions at an early stage were investigated by inserting solid alloy piece into contact with the liquid iron for a predetermined time using the liquid-metal-suction method. After quenching these samples, a diffusion zone between the alloys and the liquid Fe was studied based on the microstructural characterizations. It was observed that Cr-O-(Fe) inclusions were formed in the diffusion zone, FeOx inclusions were formed in the bulk Fe, and an “inclusion-free” zone was detected between them. Moreover, it was found that the HCFeCr was slowly dissolved, but LCFeCr alloy was rapidly melted during the experiment. The dissolution and melting behaviors of these two FeCr alloys were compared and the mechanism of the early-stage dissolution process of FeCr alloys in the liquid Fe was proposed.

Characterization of Impurities and Inclusions in Ferrochrome Alloy and Their Effects on the Inclusion Characteristics in Stainless Steels

Laboratory scale alloying experiments were carried out by the addition of a commercial low carbon ferrochrome (LCFeCr) alloy to 430-grade ferritic stainless steel. The inclusions in FeCr alloys as well as in the steel samples before and after alloy addition were investigated using an electrolytic extraction (EE) technique. The results show that the Ti content decreases after the FeCr alloy addition. MnCr2O4 inclusions from FeCr alloys are transformed into Ti2O3-Cr2O3 based liquid inclusions and Ti2O3-rich solid inclusions. They are formed due to the reactions between MnCr2O4 and either TiN or dissolved Ti, which needs to be further studied. The ratio of Ti/Al in the steel melt has a direct influence on the evolution of the inclusions. The present study aims to contribute for understanding the impurities in FeCr alloys and their effect on the inclusion characteristics for the stainless steel production.

PROSPECTS FOR THE INTEGRATED USE OF SLAG WASTES FROM FERROCHROME PRODUCTION FOR HEAT-RESISTANT MATERIALS

The research results of physicochemical and physicotechnical properties of slag wastes from ferrochrome production as raw materials for heat-resistant materials are presented. Chemical and mineralogical composition of slag from high-carbon ferrochrome production and slag from low-carbon ferrochrome production, as well as their constituent main crystalline phases, represented by magnesium and calcium aluminosilicates of complex composition, have been determined by physicochemical research methods. According to X-ray phase analysis, the slag from the high-carbon ferrochrome production is represented mainly by forsterite Mg2SiO4, spinel MgAl2O4, partially amorphous glass phase and admixture of calcium orthosilicate Ca2SiO4. In the slag from the low-carbon ferrochrome production, the main crystalline phase is calcium orthosilicate γ-Ca2SiO4, as well as magnesium orthosilicate forsterite Mg2SiО4. The research results of specific surface area, average particle size determination and sieve analysis have shown that the slag from the low-carbon ferrochrome production is a finely dispersed gray powder with the following characteristics: the specific surface area – 295 m2 /kg, the average particle size – 6.8 μm, the true density – 3.01 g/cm3 , the bulk density – 739 kg/m3 . The research of the physicochemical and physicotechnical properties has established that in terms of chemical, mineralogical composition and refractoriness indices, the slags from the high-carbon ferrochrome and low-carbon ferrochrome productions can be valuable raw materials for heat-resistant materials.

Recovery of Chromium from Slags Leachates by Electrocoagulation and Solid Product Characterization

Slags produced in the steelmaking industry could be a source of chromium. Slags contain, depending on different types of slags, between 2 to 5 wt.% of Cr. Roasting of slag with NaOH, followed by subsequent leaching can produce leachates which can be efficiently processed using electrocoagulation (EC). This paper provides results from the EC process optimization for Cr(VI) solutions with initial concentration 1000 mg/L of Cr(VI). Influence of pH, current intensity and NaCl concentration on the efficiency of chromium recovery, energy consumption as well as solid product composition is discussed in detail. Optimum of pH = 6 was chosen for EC processing of Cr leachates as well as current intensities of 0.1–0.5 A because of the higher Cr/Fe ratio in solid product compared to higher current intensities. Results of EC processing of four real leachates of electric arc furnace carbon steel slag (EAFC), electric arc furnace stainless steel slag (EAFS), low carbon ferrochrome slag (LC FeCr) and high carbon ferrochrome slag (HC FeCr) were evaluated. Comparison of the results of four real leachate samples is presented. Obtained final solid product was identified as (Fe0.6 Cr0.4)2O3 and with up to 20% of Cr could be used as source of chromium in the ferrochrome production.

Thermodynamic Simulation of Reduction Processes at the Production of Ferrochrome

The possibility of reduction process of chromium from the Cr2O3 – FeO – CaO – SiO2 – MgO – Al2O3 system by carbon using the method of thermodynamic simulation was showed in the article. The compositions of chromium ore of the deposit Rai-Iz and dust of cyclones of the low-carbon ferrochrome in an amount of 0; 5; 10; 20% were used as a components of the system. The carbon was used a reducing agent. The thermodynamic simulation was performed using the HSC Chemistry 6.12 software package developed from Outokumpu, Finland. The thermodynamic characteristics of CrO (II) compound were entered into the software package’s database. The thermochemical data of compounds CaCr2O4, Fe3C, Cr3C2, Cr7C3, Cr23C6, SiC were refined. The calculations were performed using the “Equilibrium Compositions” module in the temperature range 1500 – 1700°C at a temperature increment of 100°C, at a total pressure of 0.1 MPa in the system and 2.24 m3of N2. It was determined that the increase in the dust amount from 5 to 20% did not affect practically at the reduction degree of chromium which is equal 90.2; 93.4; 94.6% respectively at the temperatures of 1500, 1600 and 1700°C. The chemical composition of the metal is, %: 65.6 – 65.1 Cr; 22.7 – 23.2 Fe; 11.5 – 11.6 C; 0.2 – 0.26 Si at the temperature of 1700°C. The thermodynamic simulation results can be used to develop technology for producing ferrochrome using wastes of metallurgical production.

PHYSICAL AND CHEMICAL STUDIES OF SLAG OF PRODUCTION OF LOW-CARBON FERROCHROME - COMPONENT OF HEAT-RESISTANT BINDER MATERIAL

The aim of the work is physicochemical studies of chemical and mineralogical composition of the slag from the production of low-carbon ferrochrome proposed to use as a component of heat-resistant binder. As a result of studies, it was found that the main crystal phase in the slag is calcium orthosilicate in the form of γ-Ca2SiO4 modification, which is also partially in the form of α-Ca2SiO4, and magnesian silicates in the form of forsterite Mg2SiО4. The main properties of the slag such as density, specific surface, dispersiveness, refractoriness are determined by the properties of the dominant mineral- calcium orthosilicate. Under conditions of slow cooling of the slag melt, the main mineral in the slag composition, i.e. calcium orthosilicate β-Ca2SiO4 passes into γ-Ca2SiO4 modification with increase in the volume of crystal lattice by ~ 12%, which leads to self-destruction and transition of the slag to a dust state. The results of studies of the specific surface, determination of the average particle size, the results of sieve analysis showed that the slag from the production of low-carbon ferrochrome is a finely dispersed gray powder with the following characteristics: the specific surface is 2955 cm2/g, the average particle size is 6.8 μm, the true density is 3.01 g/cm3, the bulk density is 739 kg/m3. When using the finely dispersed slag from the production of low-carbon ferrochrome as a component of composite binders, the energy-consuming process of its fine grinding can be eliminated. Currently, the slag from the production of low-carbon ferrochrome is practically not used as a secondary mineral raw material. However, the physicochemical properties of the minerals making up the slag allow to recommend it as a component for the manufacture of heat-resistant materials. The results of physical and chemical studies can be used to develop effective technologies for integrated processing of low-carbon ferrochrome slags.

Thermodynamic Simulation of the Silicothermic Reduction of Chromium Ore Elements

The results of a thermodynamic simulation of the reduction of the elements of the oxide system corresponding to the chromium ore composition (%) 40 Cr2O3, 21 FeO, 15 Al2O3, 6 SiO2, 16 MgO, 2 CaO, and 0.006 P2O5 by the silicon of ferrosiliconickel (28 Fe, 65 Si, 7 Ni) are presented. The HSC Chemistry 6.12 software (Outokumpu Research Oy, Finland) is used for the simulation. The thermodynamic simulation is performed for seven compositions of an ore–lime mixture differed in the CaO content (17–55%). The calculations are performed using the Equilibrium Compositions module at 1700°C, the reducer consumption 1.05mred (mred is the reducer weight stoichiometrically necessary for the reduction of chrome and iron), and the gas phase pressure 0.1 MPa (1 atm). The main results of the calculations performed are given in graphical dependences of the change in the degree of reduction of chromium (ηCr), the amount of silicon used in reduction (φSi), and the chemical compositions of the metal and slag on the slag basicity (CaO)/(SiO2) and the reducer consumption. The degree of reduction of chromium increases by 32.7% (from 64 to 95.1%) in the range of an increase in the slag basicity from 0.07 to 1.86 at φSi = 94.5%. The rational basicity of slag is shown to be 1.86–1.9. The metal of the following chemical composition is formed: 50.4 Cr, 1.97 Si, 3.3 Ni, 0.21 Al, 0.0050 P, and Fe for balance. The influence of the amount of reducer on the degree of reduction of chromium and the chemical compositions of the metal and slag at 1700°C and a slag basicity of 1.86 is studied. An increase in the reducer consumption from 0.5mred to 1.05mred makes it possible to increase the reduction of chromium by 52.4% and to reach ηCr = 95.1%, which is close to the industrial parameters of low-carbon ferrochrome manufacturing. 100% degree of reduction of chromium is achieved at the reducer consumption 2.5mred. The results of the thermodynamic simulation can be used for technological calculations of the reduction of chromium ore elements by ferrosiliconickel.