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US6402808B1 - Direct smelting process - Google Patents

A process for direct smelting a metalliferous feed material is disclosed. Char and fuel gas are produced by pre-treating coal with an oxygen-containing gas. The fuel gas is used to heat an oxygen-containing gas and/or to produce an oxygen-containing gas in an oxygen plant. Metalliferous feed material, char, and the oxygen-containing gas are injected into a direct smelting vessel, and the ...

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Smelting - an overview | ScienceDirect Topics

Smelting is a form of extractive metallurgy to produce a metal from its ore. Smelting uses heat and a chemical reducing agent to decompose the ore, driving off other elements as gasses or slag and leaving just the metal behind. The reducing agent is commonly .

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AusIron process - Outotec

The Outotec AusIron process takes place in a purpose-built smelting reactor designed to withstand high operating temperatures and turbulence through a combination of copper cooling elements at the bath level and boiler tubes (membrane walls) located at the upper part of the furnace.

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Direct Smelting - Mt Baker Mining and Metals

Promoting viable hands-on solutions is the goal of our Stop Mercury Project, and direct smelting is a mercury-free method of gold recovery from high-grade concentrates. It's a simple and cost-effective method that can be done in the field with very little education, equipment or expertise.

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

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 .

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Direct Iron Ore Smelting Process for Ironmaking – IspatGuru

Mar 28, 2017 · Direct Iron Ore Smelting Process for Ironmaking. Direct iron ore smelting (DIOS) process is a smelting reduction process for the production of hot metal (liquid iron). It is a two-stage process which has been developed in Japan.

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Copper Smelting Process - Furnaces Used, By-Products, and ...

Copper Smelting Process – Furnaces Used, By-Products, and Process Used to Smelt Copper. Manufacturing Technology / By Willie Scott / Mechanical Engineering. Introduction to Copper Smelting Techniques. Copper ore typically contains only about 0.6% of the actual copper mineral, the most common ore mined being chalcopyrite. The ore is attained ...

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Flux selection for silver smelting - Pyrometallurgy ...

The ore has silver worth about $2,500 per ton, so its not worth direct smelting at that concentration, unless you already have the facilities to smelt it. If that's the case I would need to know the ore mineralogy to advise a flux. The cost of smelting this quantity of .

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BACKGROUND REPORT PRIMARY COPPER SMELTING .

the blast is preheated with direct-fired burners; these burners will use much more fuel if the furnace is operating with an air blast than if it is operating with an oxygen blast. While the smelting process is continuous, tapping of matte and slag are intermittent. Matte is tapped into ladles for

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Flash smelting - Wikipedia

Flash smelting (Finnish: Liekkisulatus, literally "flame-smelting") is a smelting process for sulfur-containing ores including chalcopyrite. The process was developed by Outokumpu in Finland and first applied at the Harjavalta plant in 1949 for smelting copper ore. It .

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State of the direct reduction and reduction smelting processes

State of direct reduction and reduction smelting processes Process description: Iron ore is preheated in the first of two fluidized bed reactors in series and pre-

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Flux selection for silver smelting - Pyrometallurgy ...

Flux selection for silver smelting (1 reply) The ore has silver worth about $2,500 per ton, so its not worth direct smelting at that concentration, unless you already have the facilities to smelt it. If that's the case I would need to know the ore mineralogy to advise a flux. The cost of smelting this quantity of material on first glance does not...

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smelting | Definition & Facts | Britannica

The Deville process, which involves direct reaction of metallic sodium with aluminum chloride, was the basis of aluminum production in the late 19th century, but it has been abandoned in favour. copper processing: Roasting, smelting, and converting

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SMELTING SILVER - rocks4brains

SMELTING SILVER Catherine M. Helm-Clark, Ph.D. Summary This project attempted to reproduce the lead reduction method of smelting silver, as is described in classical, medieval and renaissance sources on pyrometalurgy. The lead reduction smelting process involves two-steps: a fusion

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US Patent for Direct smelting process Patent (Patent ...

A molten bath-based process for direct smelting metalliferous material and producing molten metal in a direct smelting vessel that contains a molten bath that has a metal layer that is at least 900 mm deep. The process includes selecting operating parameters of the process so that feed material (solid material and carrier gas) is injected from above the metal layer into the metal layer via at ...

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Ferrosilicon smelting in a direct current furnace(Patent ...

The present invention is a process for smelting ferrosilicon alloy. The process comprises adding a carbon source and tailings comprising oxides of silicon and iron to a substantially closed furnace. Heat is supplied to the furnace by striking a direct current arc between a cathode electrode and an ...

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HIsmelt | Industrial Efficiency Technology & Measures

Hismelt is a direct smelting process for making iron straight from the ore. Fine iron ores and non-coking coals are injected directly into a molten iron bath, contained within a Smelt Reduction Vessel (SRV), to produce high quality molten pig iron. The excess gas produced during the process is used for power generation, production of direct reduced iron (an alternative iron input for scrap ...

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(PDF) COPPER PRODUCTION WITH OUTOKUMPU FLASH SMELTING.

The process itself is proven, as its features are similar to those in FSF, Direct-to-Blister and Direct Outotec Nickel Flash Smelting (DON), with one significant difference: it is the easiest of ...

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US Patent for Direct smelting process Patent (Patent ...

A molten bath-based process for direct smelting metalliferous material and producing molten metal in a direct smelting vessel that contains a molten bath that has a metal layer that is at least 900 mm deep.

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Direct smelting method - SlideShare

Mar 08, 2013 · DIRECT SMELTINGMethod Equipment/ Principle Applicability ProcessChemical Direct Smelting Melting black Smelting is applied in most small sand scale centres and miners are familiar concentrates to with the method as it is being used produce pure for purifying sponge gold.

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