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Wednesday, August 12, 2020 | History

1 edition of Autogenous smelting of copper sulfide concentrate. found in the catalog.

Autogenous smelting of copper sulfide concentrate.

Autogenous smelting of copper sulfide concentrate.

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Published by Dept. of the Interior in Washington .
Written in English


Edition Notes

11

The Physical Object
Pagination21 p.
Number of Pages21
ID Numbers
Open LibraryOL22018151M

  This book explores flash smelting in general and Outokumpu and Inco flash smelting in particular, and also presents a mathematical description for the flash smelting process. A set of mass and heat balance equations that can be used to describe steady state smelting under autogenous or nearautogenous smelting conditions is developed.   What is claimed is: 1. A sulfide concentrate burner particularly adapted for use in the flash smelting of sulfide concentrates in a reverberatory furnace comprising a cylindrical mixing chamber, a convexo-concave housing affixed to one end of said mixing chamber, an oxidizing gas feed pipe extending through said convexo-concave housing and into the central part of the concave portion .

All primary sulfide ores of copper sulfides, and most concentrates of secondary copper sulfides (being chalcocite), are subjected to vat leach or pressure leach processes exist to solubilise chalcocite concentrates and produce copper cathode from the resulting leachate solution, but this is a minor part of the market.. Carbonate concentrates are a relatively minor product. human resources creating a new generation of autogenous smelting processes of copper concentrate. This development trend has lasted for 50 years, and high energy value of sulphide copper concentrates was used for design of technologies in which the smelting process was almost brought to a complete autogenous.

Metallurgy - Metallurgy - Matte smelting: The primary purpose of matte smelting is to melt and recombine the charge into a homogeneous matte of metallic copper, nickel, cobalt, and iron sulfides and to give an iron and silicon oxide slag. It is done in many types of furnace on both roasted or unroasted sulfide feed material. The reverberatory furnace is essentially a rectangular refractory. The product of melted sulfides is called a matte, and is highly corrosive liquid. Converting that molten sulfide matte to metal is called smelting. Small scale smelting can be done in a crucible – in fact that is what a fire assay is. When smelting assays are done on high sulfide ores, a couple of iron nails are added to the mix.


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Autogenous smelting of copper sulfide concentrate Download PDF EPUB FB2

Autogenous smelting of copper sulfide concentrate (Book, ) [] Get this from a library. Autogenous smelting of copper sulfide concentrate. [Robert B Worthington; United States.

Autogenous Smelting of Copper Sulfide Concentrate. Authors The use of pure oxygen to effect the smelting and conversion of copper sulfide concentrate in a single unit to produce blister copper and a very high so2 concentration provides a much reduced gas volume for more economical and thorough sulfur recovery.

Although the process was. This chapter discusses the process of direct-to-copper smelting that is the smelting of concentrate directly to molten copper in one furnace. Init was practiced in three smelters: Olympic Dam (Australia), Glogo´w II (Poland), and Chingola (Zambia).

All of these plants use an Outotec flash furnace. (green feed) ore concentrate produces matte, a molten mixture of copper sulfide (Cu2S), iron sulfide (FeS), and some heavy metals. Converting the matte yields a high-grade "blister" copper, with to percent copper.

Typically, blister copper is then fire-refined in an anode furnace, cast into. Autogenous Smelting Autogenous smelting involves the use of combustion heat generated by reactions of the feed in an oxidizing atmosphere in which the sulfide concentrate acts partly as a fuel. The formerly separate steps of roasting and smelting are combined into a File Size: KB.

A typical copper ore contains between % and % copper. A high grade ore produces a high yield of metal. Autogenous smelting of copper sulfide concentrate. book A low grade order produces a low yield of metal. Copper can be extracted from sulfide ores (usually higher grade ores) by direct smelting.

The earliest evidence of copper smelting occurs in Serbian artefacts dating from around BC. Copper concentrate particles of to mesh size were fed from the top of vertical reaction tube of cm ID and 2 m long with an O 2-N 2 gas mixture.

Copper concentrate smelting is a large scale, intensive process consisting of four stages: sulphur in the sulphide minerals is “burnt-off”; the metals are melted to form a “matte” and the waste material forms a “slag”; copper in the matte is electro-refined to copper metal; and the gold/silver is refined to doré.

So 4 cups is one pound times 8 grams Gold per cup so 32 grams per pound of concentrate. Rounding the 32 down to 1 troy ounce you have a concentrate used in the video of oz per ton.

That is a world of difference from 6 oz per ton. What you have is a leaching proposition not a smelting proposition. Self-heating smelting of sulfide concentrate sustains high-temperature smelting process mainly from the oxidation of sulfide in the concentrate and the heat from ferrous oxide in slag.

As it is not necessary to add fuel, it is called heat smelting. Depending upon the pyrite content in the copper-bearing ore, smelting requires an addition of 2%. The silicate slag and copper matte that are the byproducts of smelting copper in a reverberatory furnace contain SiO2, FeO, Fe3O4, CaO and Al2O3, and Cu, Fe and S, respectively.

These components influence the oxide (Cuox), sulfide (Cusul) and total (Cutotal) copper content lost in the waste slag.

This paper uses multiple linear regression analysis (MLRA) to determine the degree of influence. Autogenous smelting process of the copper concentrates in this procedure, compared to the reverbatory furnace, which were mostly presented in the world plants until s, has significantly better technical and economical indicators: more efficient utilization of sulphide energy from concentrate, higher metal and sulfur utilization and far better protection from SO.

The present invention provides a process for direct-to- blister copper flash smelting, where the energy balance of the smelting process and decreasing the overall impurity content of volatile components in controlled by roasting at least part of the copper concentrate,together with flue dust,before the smelting step.

The present invention further provides a use calcine obtained by the roasting. A copper flash smelting process in which part of a sulfidic copper feed is roasted in the presence of a calcareous SO2scavenger to produce a calcine containing calcium sulfate and an oxidic copper.

New areas of coverage include the environmentally appropriate uses of copper cables in power transmission for wind and solar energy sources; the recycling of electronic scrap as an important new feedstock to the copper industry, and state-of-the-art Ausmelt and Isasmelt bath smelting processes for sulfide concentrate smelting and converting.

The phase composition and the structure of the solidified mattes of the autogenous smelting of copper–zinc concentrates containing and % Cu in Vanyukov’s furnace are studied. The forms of the main elements (Cu, Ni, Fe, S, O) and the accompanying impurities (Zn, Pb, As, Sb, Co, Sn, Au, Ag) in the rich matte are determined.

When sulphide ore is heated in air it is converted into copper oxide and SO2 is left. Again, copper oxide is then reduced to copper on heating(for equation, refer 10th CBSE text, pg no.

51). ROASTING OF SULFIDE MINERALS In addition to common metals like copper, lead, zinc, and nickel a number of other metals such as antimony, bismuth, cadmium, cobalt, mercury, and molybdenum occur as sulfide minerals. Sulfides are not reduced with the most widely used redu-cing agents, carbon and hydrogen, because the free energy change for the.

After this stage the enriched ore now contains about 25% copper by mass and is called copper concentrate. It is valuable enough to ship to other plants and other countries for processing. This is either sold for industrial use or used to extract oxide ores of copper by leaching.

Stage 4: Smelting with fluxes Formation of blister copper. The distribution of antimony in sulfide copper-zinc concentrates processing products manufactured according to a production scheme including autogenous smelting, matte conversion to blister copper, and flotation extraction of metals from slags, is evaluated.

The main products concentrating antimony concern autogenous smelting and conversion dust. The proportion of antimony transferred into. developed by Outokumpu-orInco for example, employ sulphide concentrate burners that both oxidize and melt the feed, and are used extensively in the copper industry.

Autogenous bath smelting as practised, for example, in ISASMELT or Ausmelt furnaces is another alternative that is also used.converter (PSC).

The products of copper sulfide concentrate smelting in the FSF are (i) molten sulfide matte (62% Cu), (ii) molten oxide slag (1,4% Cu) and (iii) off-gas (32,3% SO 2). In order to increase process efficiency and reduce environmental impact, the New Copper. Copper and or nickel sulfide ore concentrates of high intrinsic value are oxygen smelted by introducing such concentrates via feeds (32) into a closed loop extraction circuit in which a molten sulphide carrier composition is forcibly circulated by an R-H unit (14) through lower hearth (10) at which feed of the concentrates takes place, and upper hearth (12) at which controlled oxidation with.