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Study and Design of Chromium Ore Smelting Reduction ...

Study and Design of Chromium Ore Smelting Reduction Process for Producing Stainless Steel in a Converter p.164 Design and Application of Multi-Well Automatic Metering and Remote Monitoring System

Study and Design of Chromium Ore Smelting Reduction ...

Request PDF Study and Design of Chromium Ore Smelting Reduction Process for Producing Stainless Steel in a Converter This paper describes the concept of the construction of steelmaking shop ...

Study and Design of Chromium Ore Smelting Reduction ...

This paper describes the concept of the construction of steelmaking shop, which is carried out as part of a modernization plan aimed at creating a 21st century environmental-friendly iron and steel works, designs the smelting reduction process of producing stainless steel crude melts in a 150 t converter and presents an outline of the equipment specifications and the conditions of operation, according to the blowing conditions of 185 t smelting reduction

Research on the Thermodynamics and Kinetics of

A reference and basis on the constitution of rational processing route for a practical stainless steelmaking were provided. 516. Study and Design of Chromium Ore Smelting Reduction Process for Producing Stainless Steel in a Converter. Authors: Yan Liu, Mao Fa Jiang, De Yong Wang.

chromium smelting yield from ore

2020-10-6  Kinetic Study on Smelting Reduction ofChromite Ore. Smelting reduction ofchromite ore was studied in systems and conditions related to ferrochromium production in submerged arc furnace. Dissolution ofchromite pellets or lumpy ore as well as reduction ofiron, chromium and silicon oxide were studied by immersing chromite samples in a slag melt in a graphite crucible.

A Coupling Dynamic Model for the Process of Chromium

The results of the model show that the mass transfer of Cr2O3 in the slag phase is suggested to be rate-determining and the coke as reducing agent should be supplemented in the slag continuously. The model described and resolved the process of chromium ore smelting reduction in a converter preferably.

Reduction Mechanism of Chromite Ore during Smelting

The results show that the process of reduction occurs in two stages. At the first stage, the chromite ore is reduced indirectly with CO, which can be described well by the unreacted core model.

Smelting chrome ore - ScienceDirect

1976-1-1  T H E DOMINANT SMELTING REACTIONS I n the smelting process the electric furnace is charged with the chrome ore, a carbon reducing agent, and a flux, usually quartz. Reaction of these materials produces slag and liquid ferrochrome, which are withdrawn from the hearth, and carbon monoxide, which rises through the descending charge.

(PDF) Reduction mechanism of chromite spinel with carbon

Ferrochromium produced by smelting chromite ores is an important alloying component in the steel industry. Ore, coke and fluxes are mixed and reacted in an arc furnace for a smelting process

3A3. Direct Iron Ore Smelting Reduction Process (DIOS)

2013-10-24  The Direct Iron Ore Smelting Reduction Process (DIOS) directly uses noncaking coal in a powder or granular form, and iron ore without the use of coke or a sintering process, which are normally required in blast furnace processes. The noncaking coal is directly fed to a smelting reduction furnace, while the iron ore is preliminarily reduced before being fed to the furnace, thus producing molten iron.

Development of Energy-Saving Stainless Steelmaking ...

2019-4-3  chromium ore in the smelting reduction process, and this is a large endothermic reaction, it is essential to increase the heat supply to the furnace in order to increase the amount of reduction of chromium ore. For this reason, the smelting reduction process also consumes a large amount of carbonaceous material as a heat source. Heat

[PDF] The prereduction and smelting of chromite ...

SYNOPSIS The prereduction and smelting characteristics of UG-2 ore were studied and compared with those of Winterveld chromite ore. The UG-2 ore proved more reducible, and substantial prereduction (over 70 per cent reduction after 30 minutes at 1250QC) was obtained. No difficulty was experienced in the production oh high-carbon ferrochromium alloy containing 48 to 50 per cent chromium.

A Coupling Dynamic Model for Dissolution and Reduction

For describing and resolving the process of chromium ore smelting reduction in a converter preferably, the coupling dynamic model was established based on the kinetic models of chromium ore ...

(PDF) Reduction mechanism of chromite spinel with carbon

In this study, the reduction of Turkish chromite ore with carbon was investigated. Chromite and carbon were ground to three different particle size groups. Chromite was mixed with carbon in ...

Effect of Cr2O3 on the Reduction and Smelting

chromium vanadium-titanium smelting mechanism on the basis of having accomplished the study on the effect of TiO 2 on the smelting mechanism of high chromium vanadium-titanium pellets,7) and in order to accomplish this purpose, researches were carried out for the effect of Cr 2O 3 on the reduction mechanism and on the softening-melting-dripping ...

(PDF) Kinetic analysis of the chromium oxide reduction ...

Experiments on the smelting reduction of chromite ore in a 1-kg middle frequency induction furnace showed that the reduction is controlled by the mass transfer of chromium oxide dissolved in the slag.

Chromium Ore - an overview ScienceDirect Topics

This process has been operated at Chiba Steelworks, Kawasaki Steel Corporation (currently JFE Steel Corporation) since 1994. In this steelworks, stainless steel is produced by smelting reduction process of chromium ore with hot metal produced at a BF in a specialized converter-type furnace. Stainless steel dust containing Cr and Ni is generated from this smelting process.

3A3. Direct Iron Ore Smelting Reduction Process (DIOS)

2013-10-24  3A3. Direct Iron Ore Smelting Reduction Process (DIOS) Technology Overview˜ ˜ 1) Core technology study (FY1988-FY1990) Core technologies necessary for the construction of the pilot plant were established. These core technologies include an increase in the thermal efficiency of a smelting reduction furnace

The reduction of chromite in the presence of silica flux ...

2006-3-1  Disadvantages of this process are the limited use of chrome ore fines and friable chrome ores and the fact that more than two-thirds of the total electrical energy consumption (4000–4200 kW h/ton metal) is used for heating and reducing the chromite. To improve cost effectiveness, solid-state carbothermic pre-reduction has gained importance.

Thermodynamic study of direct reduction of high

2018-9-3  High-chromium vanadium–titanium magnetite (HCVTM) is a good valuable resource with high iron content in the form of complex iron ore which contains various valuable metal elements such as iron, vanadium, titanium, chromium. Direct reduction of HCVTM is studied based on thermodynamic analysis. Combined TG experimental verification and equilibrium calculation model was used to analyze the ...

[PDF] The prereduction and smelting of chromite ...

SYNOPSIS The prereduction and smelting characteristics of UG-2 ore were studied and compared with those of Winterveld chromite ore. The UG-2 ore proved more reducible, and substantial prereduction (over 70 per cent reduction after 30 minutes at 1250QC) was obtained. No difficulty was experienced in the production oh high-carbon ferrochromium alloy containing 48 to 50 per cent chromium.

Study on Dissolution and Reduction Mechanism of ...

Chromium ore / Dissolution of chromite / Smelting reduction / Ferrochrome production / Chromium valence in slag / Temperature dependence of reduction rate / EPMA分析 Research Abstract Experiments were conducted to elucidate smelting reduction behavior of powdered chromium ore in molten slag at the temperatures between 1550 and 1650゜C.

Chrome Ores on Ferrochrome Smelting

2015-3-12  ore and less quartzite to feed in the furnace. With the combined effect of more ores and less quartzite, the smelting process produces more slag and requires more electric energy to heat and melt the slag. Keywords—Ferrochrome production, ferroalloy process optimization, chrome ore I. INTRODUCTION

Production Smelting Technologies for Ferrochromium

2011-3-30  chromium carbide with the use of a high density-high smelting ore. The high density (approx. 4 g/cm') will allow it to pass through the low density slag (-3 gl cm') and form a chromic oxide rich layer above the molten ferrochromium 191 Such an ore layer can oxidize the chromium carbides. Further, due to

The transformation of ferrochromium smelting

2009-8-26  and process automation have developed considerably and thus the operation of the plants improved. A major part of new process technology has been launched in ferrochrome production. Especially in 1980s, strong interest was seen in research and implementation of new methods such as plasma smelting, pre-reduction and direct reduction.

FACTORS AFFECTING THE REDUCIBILITY OF SINTERED

trate. Smelting of these pellets result s in excellent efficiency and smelting key figures. The recovery of chro-mium depends on the grade of chromite, the method of chromite pre-treatment and the smelting process (e.g. temperatures). This study is divided into two sections. Firstly, it cons iders the factors which affect solid state reduction ...

Spinel Removal from PGM Smelting Furnaces

2016-2-15  chromium in the furnace have met with limited success. Since chromium reports in the form of the trivalent oxide, and reduction to the metallic form is thermodynamically virtually impossible under normal matte smelting conditions, chemical chrome control depends on creating a slag in which the maximum amount of chrome is dissolved in the slag.

KWG Resources Inc. (KWG: CSE) natural gas chromite ...

GAS REDUCTION. KWG NATURAL GAS CHROMIUM IP DIRECT REDUCTION IN A SOLID STATE. The impact of KWG Resources new Canadian patented process on possible future direct reduction of chromite processing, has the potential for global energy reductions equivalent to the effect of completely eliminating energy demand from a country the size of Italy.. KWG CEO Frank Smeenk said “We

CiNii 論文 - Kinetic study on the smelting reduction of

Kinetic study on the smelting reduction of bottom-injected chromite ore powder by dissolved carbon in iron melt. KAWAKAMI Masahiro , KITAJIMA Youharu , HASHIMOTO Kaoru , ITO Koin Transactions of the Iron and Steel Institute of Japan 27(3), 176-184, 1987

Design of Reduction Process of SnO2 by CH4 for Efficient ...

2017-10-31  We design a novel method for the CH4 reduction of SnO2 for the efficient recovery of Sn from SnO2 through a study combining theory and experiment. The atomic-level process