gas-tight electrode for carbothermic reduction furnace -

Silicon smelting in a closed furnace (Conference)

The single electrode furnace is operated under totally sealed conditions. The feed from the feed hoppers is fed through air locks to the furnace. The off-gas from the furnace, consisting of by-product CO as well as volatiles from the feeds, pass through a venturi

Proceedings of the Fourth International Symposium,・ on

high purity Ar gas atmosphere. Carbothermic reduction of the oxides in N2-H2 mixed gas stream was adopted for synthesizing mixed nitride. Sintering was carried out in various conditions and ths effect on the pellet characteristics was investigated.

Patents Assigned to Elkem ASA

Abstract: In a method for recovering Al from an off-gas (3,4) produced during carbothermic reduction of aluminum utilizing at least one smelter (1,2), the off-gas (3,4) is directed to an enclosed reactor (5) which is fed a supply of wood charcoal (7) having a porosity of from about 50 vol. % to 85 vol. % and an average pore diameter of from about 0.05 ?m to about 2.00 ?m, where the wood

Analysis of Transport Phenomena in Submerged Arc Furnace for

around the electrode tips. This leads to various zones in the furnace and different reduction mechanisms, as is clearly exemplified by the dig-out of large scale industrial submerged arc furnaces for ferrochromium and ferromanganese furnaces [1-2]. In the furnace

Reductant selection in ferro

carbothermic reduction of these oxides is to heat the oxide-reductant mixture to a high enough temperature. Viewed in this simplistic permeability, given the high gas flow rate in blast furnace ironmaking. Because of this importance, several correlations 14,

Alternative Al production methods: Part 1

Alternative Al production methods: Part 1 - a review of indirect carbothermal routes Abstract The production of Al from its ores at present relies on the Bayer (alumina production) and the Hall- Heroult (Al production) process. The cost associated with alumina

Synthesis of Li2S

Shi et al. Lithium Sulﬁde-Carbon Cathode CO changes with temperature due to their diﬀerent stability as the function of temperature (Zhang et al., 2017). Therefore, the carbothermic reduction of Li2SO4 can be expressed as Reaction 2, in which the stoichiometric ratio of C/Li2SO4, x, is a function

Non

Other phenomena that must be controlled during sintering are gas-phase processes, which are caused by reactions of the sintered material with the furnace atmosphere or by gas release. For nonoxide ceramics, carbothermic reduction processes between oxides (e.g., sintering additives) present in the ceramics and carbon can take place, for example.

Non

THE SUBMERGED ARC FURNACE (SAF) STATE OF ART IN METAL

selective carbothermic reduction for processing reverberatory furnace slag stockpile of 20 million tons containing 0.34 to 4.5% cobalt, and an average of 1.1% copper. Cobalt occurs as fayalite whereas copper occurs as oxide and sulphide.

ENVIRONMENT GUIDELINES FOR SIZING BAGHOUSE FILTERS USED FOR FERROALLOY AND SILICON METAL FURNACE APPLICATIONS

ENVIRONMENT GUIDELINES FOR SIZING BAGHOUSE FILTERS USED FOR FERROALLOY AND SILICON METAL FURNACE APPLICATIONS 1Francis D. Fereday, 2Louis Raath, 3Benoit de Montard 1W. L. Gore and Associates, Inc., Elkton, Maryland, USA, e-mail: fferedaywlgore

Preparation of uranium carbide through carbothermic reduction

Preparation of uranium carbide through carbothermic reduction of uranium dioxide Emil Lundgren emlundgkth.se SA104X Degree Project in Engineering Physics, First Level Supervisor: Dr. Mikael Jolkkonen Department of Physics School of Engineering Sciences

DC Arc Furnace Technology Applied to Smelting Applications

Forthe case ofa multiple electrode DC furnace however, equation (2) can be written I I I I I I I I,aclIvvac I I I, I .----I.K I Ivv CLI' ac I-,- I I I I I I I I I I I I I I I I cC' 'cc I I I The corresponding arc power and electrode current is shown inFigure 5. 60 80 100 120 140 160 EAF

Kai Johansen Inventions, Patents and Patent Applications

Kai Johansen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO). Abstract: The present invention relates to high strength, oxidation and wear resistant titanium-silicon base alloy containing: 2.5-12 wt % Si 0-5 wt % Al 0-0

DC Electric Arc Furnace Application for Production of

A carbothermic reduction including an electric arc furnace enables industrial-scale production. The DC arc furnace was selected because of its advantages over an AC arc furnace. The reaction behaviors of reduction processes were investigated, and the reaction

Kai Johansen Inventions, Patents and Patent Applications

Influence of carbothermic reduction on submerged arc

2016/12/1We collected operational data in 24 h intervals to investigate the effect of raw materials on the exergy of carbothermic reduction in the furnace. In order to evaluate the exergy of the raw materials as accurately as possible, nearly three months of real-world production data was collected.

Silicon smelting in a closed furnace (Conference)

Abstract Dow Corning has been working towards the advancement of silicon smelting in a closed furnace over the past four years. A 200 kVA closed furnace pilot plant unit was built to investigate the operating parameters for smelting silicon. The single electrode

Tapping of metallurgical silicon furnaces

Furnace Tapping 2018, Edited by J.D. Steenkamp H. Kotz, Southern African Institute of Mining and Metallurgy, Kruger National Park, 14–17 October 2018 1 Tapping of metallurgical silicon furnaces – a brief comparison between continuous and discontinuous

Investigation of a Novel Concept for Carbothermic Reduction of

perature carbothermic reduction of alumina in a labscale electric arc furnace (EAF) under protective gas over the gaseous phase. Work done for Al-Generation over the gaseous phase can be divided into 5 sections: • Rebuilding of the furnace • Pre-service

Carbothermic Reduction of Amorphous Silica Refined

Aimed at developing solar-grade Si (SOG-Si) resources, amorphous silica (AS) refined from diatomaceous earth was reduced carbothermically. The reactivity of quartz—typically crystalline silica—also was investigated for comparison. Preliminary experiments confirmed an intermediate phase of SiC during the carbothermic reaction. SiC was produced more easily by heating AS mixed with

Plasma Furnaces: Enabling Steelmakers to Properly

Harsco introduced a solution based on the process of operating a carbothermic reduction of the metallic oxides included in the dust. The solution is powered by a DC plasma furnace, which creates a high temperature plasma-arc in a plasma forming gas (e.g., nitrogen).

Silicon smelting in a closed furnace (Conference)

2021/3/22Dow Corning has been working towards the advancement of silicon smelting in a closed furnace over the past four years. A 200 kVA closed furnace pilot plant unit was built to investigate the operating parameters for smelting silicon. The single electrode furnace

Factors influencing base metal recovery from waste reverberatory furnace slags in a 50 kVA laboratory DC plasma arc furnace

Mechanisms of reduction of slag by carbon have been investigated and have shown that the limiting reaction is probably the Boudouard reaction. From tube furnace studies on the carbothermic reduction of Zambian copper-dump slags, it was concluded that