US3725044A - Method of continuous processing of sulfide ores - Google Patents

Method of continuous processing of sulfide ores Download PDF

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Publication number
US3725044A
US3725044A US00881226A US3725044DA US3725044A US 3725044 A US3725044 A US 3725044A US 00881226 A US00881226 A US 00881226A US 3725044D A US3725044D A US 3725044DA US 3725044 A US3725044 A US 3725044A
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slag
furnace
unit
smelting
rate
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T Morisaki
K Tachimoto
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Mitsubishi Metal Corp
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Mitsubishi Metal Corp
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B23/00—Obtaining nickel or cobalt
    • C22B23/02—Obtaining nickel or cobalt by dry processes
    • C22B23/025—Obtaining nickel or cobalt by dry processes with formation of a matte or by matte refining or converting into nickel or cobalt, e.g. by the Oxford process
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B15/00—Obtaining copper
    • C22B15/0026—Pyrometallurgy
    • C22B15/0028—Smelting or converting
    • C22B15/005—Smelting or converting in a succession of furnaces
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B5/00—General methods of reducing to metals

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  • This invention relates to a method for continuous processing of sulfide ores, and more particularly to a method for extracting copper, nickel, cobalt, and other similar metals in large quantity and in an economical manner by treating sulfide ores of these metals through a series of furnaces that are mutually linked together and by exchange transfer of intermediate products in the molten state, all these operations being carried out continuously and successively.
  • FIG. 1 is a longitudinal section showing arrangement as well as connection of the fundamental unit furnaces according to the present invention
  • FIG. 2 is an enlarged diagram showing the relative positions of product layers when matte is caused to flow by itself between the first furnace (smelting furnace) and the second furnace (slagging furnace);
  • FIG. 3 is an enlarged longitudinal section showing a structure to continuously transfer into the first furnace the slag produced in the second (slagging producing) furnace so as to maintain the state shown in FIG. 2;
  • FIG. 4 is a longitudinal cross-section of a modified arrangement of the furnace, in which the method of the present invention is practiced with only the first furnace (smelting furnace) and the third furnace blister furnace) shown in FIG. 1.
  • the furnace has in itself three substantially independent reaction zones, i.e., the smelting zone, the blister making zone, and the slag settling zone, or three furnaces, each having such an individual discrete zone is formally combined into one whereby the slag and the matte are made to move through these reaction zones, interacting with each other, either in counteror in parallel-flow.
  • various reaction conditions such as the position or level of melt surface, the composition of the melt and its temperature have to be controlled independently from one to the other.
  • control is extremely difficult because the zones cannot be made entirely independent of each other in one and the same furnace, having one and the same hearth in common.
  • Such a furnace should be provided with an inclined hearth in the slag settling zone so as to effect a satisfactory recovery of copper from the slag.
  • the furnace shape and the hearth design become very complicated. All these conditions necessitate constant surveillance, repairing, and maintenance, which constitute a great obstacle for the continuity and constancy of the furnace operations.
  • the present invention has succeeded in overcoming all these shortcomings inherent in the conventional methods by a distinctly different method, in which a plurality of furnaces, each having a different function as required at each stage of the metal processing operations, and a simple construction for easy operation, are combined integrally and sequentially, whereby it becomes possible to transfer intermediate products in the form of melts of slag, matte, revert slag, white metal, and blister metal between the respective furnaces in a continuous, constant, and functional manner.
  • the present invention establishes a novel method for continuous mass production of an exceptionally high metallic yield, as well as effecting an extraordinarily high degree of recovery of sulfur dioxide, resulting in an admirably high productivity.
  • substantially continuous transfer designates a transfer system whercin,even if the transfer is done batchwise, the quantity transported in a single batch is so small in comparison with the quantity held in the furnace that any fluctuation of metallurgical reaction condition due to the batchwise transportation can be neglected.
  • this invention appropriately describes as its initial installation a furnace unit whose major function is to melt sulfide ores, namely the smelting furnace unit, furnace a second whose major function is to initially oxidize all the iron in the matte to produce white metal, namely the slagging furnace, and a third furnace unit whose major function is to further oxidize the sulfur in the white metal to produce blister copper, namely the oxidizing or blister furnace.
  • These three furnaces are disposed in such a manner that the exchange of heat between the respective furnaces is limited substantially to that caused by transfer of the melts, and each furnace is designed so as to enable the composition, temperature, and levels of free surface and interface of the melts in the furnace to be controlled independently of the other furnaces and to maintain them at predetermined figures.
  • Both oxidizing furnaces may be combined to perform the entire oxidation operation in a single unit as set forth below.
  • a first stage in which a melting stock (or simply raw material) consisting of sulfide ore and flux, as its principal components is suitably combined with fuel and air in an appropriate proportion to meet predetermined reaction conditions i.e.
  • This transfer operation between the smelting furnace and the slagging furnace can be done one of two ways, i.e., a natural transfer which causes the matte to flow by means of gravity or under its own weight by taking advantage of the head between the melt in the smelting furnace and that in the slagging furnace, or secondly a forced transfer which causes the matte to flow by means of externally applied force. Either of these two ways may be chosen.
  • a second stage in which air, flux, and coolant are suitably combined in a proportion to yield a predetermined composition of white metal and slag to be determined by the aforesaid raw material feeding rate at the first stage, and then fed directly and continuously into the melt in the slagging furnace to produce and separate without delay white metal and the revert slag, simultaneously allowing the revert slag to overflow from the slagging furnace to be substantially continuously to the smelting furnace, while causing the white metal to flow from the slagging furnace under its gravity to be charged into the blister furnace.
  • a third stage in which only air, or a combination of air and a coolant, which does not form slag, in a quantity determined by the reaction conditions in the smelling furnace and in the slagging furnace are fed directly and continuously into the melt in the blister furnace to produce blister metal; simultaneously allowing the blister metal to overflow continuously from the blister furnace so as to be sent to a further refining process.
  • the abovementioned three stages are characteristically combined in particular relationship that so the rates of production of slag, matte, white metal, and blister metal in the respective furnaces as well as the rate of transfer of the melt between the respective furnaces are adjusted by the feeding rate of the raw material and coolant and maintain constant equilibrium among them, and, at the same time, the composition, temperature, and levels of free surface and interface of the melts in the respective furnaces are controlled independently in each furnace to constant values, thereby obtaining metal from ore in a continuous and highly economical manner.
  • the apparatus for continuous processing of sulfide ores comprises a smelting furnace 1, a slagging furnace 2, and a blister furnace 3.
  • the smelting furnace 1 is provided with lances 6, a slag overflow port 7, a matte tapping port 8, a matte siphon 9, a siphon overflow wcir 9a which is provided at a predetermined level, and a revert slag charging port 15.
  • Slag 4 and matte 5 are within the smelting furnace.
  • the slagging furnace 2 is provided with a matte charging port 10, lances 13, an overflow port 14 for revert slag, a white metal tapping port 16, a white metal siphon 17, and a white metal siphon overflow weir 17a.
  • White metal 11 and revert slag 12 are contained within the slagging furnace.
  • the blister furnace 3 is provided with a white metal charging port 18, lances 21, a blister siphon 22, and a blister overflow weir 22a.
  • White metal 19 and blister copper 20 are contained within the blister furnace in layers.
  • FIG. 3 indicates a connection means between the smelting furnace and the slagging, which is constituted by a bubble pump 23 having a U-shaped conduit and a bubbling nozzles 24.
  • FIG. 4 shows a connection means between the smelting furnace and the blister furnace, which is constituted by the matte tapping port 25 in the smelting furnace, a matte charging port in the blister furnace, a path 27 for forced transfer connecting the tapping and charging ports, a blister furnace slag overflow 29, a blister furnace slag conduit 30, and a blister furnace slag charging port 31.
  • the blister furnace slag 28 is on the top surface in a layer over the white metal 19. Flue ducts 32 may be made common to all the furnaces for S removal. 7
  • raw material mainly containing sulfide ore and a flux such as silicate ore is appropriately combined with fuel and air at a rate suitable for a predetermined reaction conditions to yield a predetermined composition of slag and matte, and is fed directly and continuously at a pre-determined feeding rate into the melt bath 4 and 5, or both.
  • a feeding method may be adopted, when pulverized or granulated raw material is blasted together with an air stream into the melt through the lance pipes 6, a large quantity of the raw material can be melted rapidly and efficiently, and, at the same time, generation of dust can be avoided.
  • the mixing ratio of the air to the raw material should be adjusted to be barely sufficient to burn the excess sulfur in the raw material, which possibly minimizes the premature oxidation of iron in the raw material and also makes it possible to maintain the grade of the matte produced low enough to cause a more complete stripping of copper contained in the revert slag.
  • the fuel be it gaseous, liquid, or solid, should be in such quantity to replenish any insufficiency of heat in the smelting furnace. For this purpose, either preliminary heating of air and/or raw material, use of oxygen or oxygen-enriched air, or combined use of these. two expedients is considered effective.
  • the fuel need not be fed to the same site as the raw material, when it is blown directly into the melt bath in the same manner as the raw material, an extremely large heat transfer ef ficiency is obtained.
  • the waste gas temperature can be lowered to a substantially same level as that of the melt, the capturing and treatment of the waste gas is greatly facilitated, and the life of the furnace wall is much more prolonged.
  • FIG. 1 shows a case wherein the transfer of the matte is done by the natural transfer method, which can be attained easily by installation of a siphon 9 having the matte tapping port 8 opened at the lower part of the furnace at a position close to the furnace hearth.
  • FIG. 2 is an enlarged view'of the siphon 9 and the relative positions of the melts in its vicinity.
  • the matte 5 is subsequently continuously charged into the slagging furnace 2 through the matte charging port 10 and becomes rapidly molten in the white metal bath 11 which is coexistent overlaid with the revert slag 12 in the slagging furnace.
  • this bath 11 or 12 air or a mixture of air and flux are directly fed.
  • a quantity of coolant consisting mainly of the raw material and scrap metal is charged and molten to further increase the ore processing capability of the system as a whole.
  • the feeding of the coolant to the slagging furnace may be carried in the same manner as in the smelting furnace, namely through lances 13.
  • the oxidation. of iron to iron oxide proceeds until the white metal 11 is formed which contains substantially no iron.
  • the iron content in the white metal can be controlled to any low level by varying the proportion of the air with respect to the matte and coolant.
  • the white metal is continuously tapped from the furnace through the siphon 17 and charged continuously to the blister furnace 3, while the revert slag 12 is caused to overflow continuously out of the slagging furnace through the revert slag overflow port 15 by natural or the forced transfer methods and the manner in which the transfer or revert is to be carried out is arbitrary as long as it is done at least substantially continuously; for example, it can be done by means of a continuously moving mechanism having any number of small buckets, and it is also possible to attain the purpose in an easy, steady and perfect manner by using the bubble pump as shown in FIG. 3.
  • the white metal 11 is charged continuously into the blister furnace 3 through the white metal charging port 18.
  • the blister copper is extracted by blowing air directly into the melt bath 19 or 20, or both through the lances 21 so as to remove sulfur content in the white metal by oxidation.
  • the white metal layer 19 and the blister copper layer 20 In the blister furnace, there are generally present the white metal layer 19 and the blister copper layer 20. It is possible to regulate the operating conditions by adjusting the air intake so that the melt in the furnace may be substantially blister copper alone. It also is possible to further increase the production of the blister copper by melting into the bath a coolant which does not form slag such as scrap metals to utilize the excess heat generated. Also, a flux may be added to the melt bath to remove impurities such as lead, arsenic, and antimony.
  • the blister copper is continuously tapped by the siphon 22 from the furnace and led to a known refining process stage without interruption.
  • the levels of the overflow weir 22a of the siphon 22, and the white metal charging port 18 as well as the quantity of the air to be blow, the levels of the free surface of the melt and the interface between the white metal and blister copper, hence the quantities of the white metal and the blister copper held in the furnace, can be maintained constant.
  • the waste gas is taken out by the flue duct 32 and is usually supplied to the sulfuric acid manufacture plant.
  • each furnace with a double-shell structure, and by maintaining the atmosphere within the furnace at a slightly positive pressure, and the space between the furnace walls and the outer shell at a slightly negative pressure, both with respect to the atmospheric pressure, the leakage of the atmospheric air into the furnace can be prevented, thus result in increase in the thermal efficiency of the furnace, and the leakage of the furnace gas into the external atmosphere can be prevented to permitting capturing and recovering of sulfur dioxide at a high degree of efficiency.
  • the matte formed in the smelting furnace is charged directly into the blister furnace, the second stage at the slagging furnace being entirely omitted.
  • the matte can be converted directly to the blister copper without collecting white metal as an intermediate product to be transferred.
  • FIG. 4 shows schematically in which the slag 4 of the smelting furnace 1 overflows the furnace through the slag overflow port 7, while the matte 5 is caused to flow out of the furnace at a required level through the matte tapping port 25 and the siphon (not shown), and is simultaneously charged into the blister furnace 3 directly without interruption through the matte charging port 26 by means of the forced transfer means (not shown) such as the bubble pump or buckets.
  • the blister furnace In the blister furnace, the blister furnace slag 28 formed therein, white metal 19, and blister copper 20 are coexistent.
  • the slag 28 is caused to overflow continuously from the furnace through the overflow port 29 and is charged into the smelting furnace 1 through the duct 30 and the blister furnace slag charging port 31, while the blister copper 20 is tapped continuously out of the furnace 3 by the siphon 22 and led to a known refining process stage without interruption.
  • the furnace wall bricks are no longer exposed directly to the high temperature combustion gas, hence the service life of the bricks are markedly prolonged, and at the same time, as the furnace need be neither tilted nor stopped its operation for charging and discharging the intermediate products. Continuity of the furnace operation is secured over a very long period of time.
  • the revert slag and the matte charged in the furnace are brought into an intimate contact, and as the copper concentration of the matte is kept at as low a level as desired, the magnetite in the slag is reduced quickly, while the copper therein is stripped into the matte rapidly and recovered at a high rate, whereby the copper content in the slag becomes as low as or even lower than 0.5 percent in spite of the fact that the average residence time of the slag in the furnace is remarkably shorter than that in the known methods.
  • EXAMPLE l 40 kg of concentrated copper ore containing 25.6 percent copper, 31.3 percent iron and 33.2 percent sulfur, 9 kg of silicate sand, and 4.9 kg of lime were respectively lanced directly into the matte bath in the smelting furnace together with Nm;, per minute of compressed air showing at a gauge pressure of 0.2 kg/cm Concurrently therewith, 3.5 liter of fuel oil was lanced into the melt together with 37 Nrn per minute of compressed air.
  • the matte thus produced was tapped continuously out of the furnace through the siphon, and then transferred and charged into the slagging furnace at a rate of approximately 32.5 kg per minute by means of a continuously operating bucket mechanism.
  • the composition of the matte was 35 percent copper, 36.8 percent iron, and 26 percent sulfur, while that of the slag was 0.3 0.5 percent copper, 35 38 SiO and 4 6 CaO.
  • the thickness of the slag layer was adjusted to be maintained at approximately 10 cm.
  • Compressed air was blown into the white metal bath in the blister furnace at a rate of 10 Nm per minute together with a small quantity of silicate sand and lime, and scrap metal was charged thereinto at a mean rate of approximately 10 kg per minute so as to maintain the temperature in the furnace at l,200 1,250C.
  • the blister copper thus obtained was tapped continuously out of the furnace by means of a siphon at a rate of approximately 23 kg per minute.
  • the concentration of sulfur dioxide in the waste gas was 6 7 percent in the smelting furnace, l1 13 percent in the slagging furnace, and 16 18 percent in the blister furnace, respectively, and the capturing rate thereof was approximately 99 percent of the total quantity.
  • the generation of dust was less than 1 of the raw material charged.
  • EXAMPLE 2 Copper ore concentrate consisting of 25.4 percent copper, 27.7 percent iron, and 33.3 percent sulfur, granular silicate ore containing SiO and pulverized lime stone containing 53 CaO, were mixed at a ratio of l5 8, and the mixture material was lanced directly into the matte in the smelting furnace at a rate of 50 kg per minute on a stream of 20 Nm per minute of compressed air showing at gauge pressure of 5 kg/cm. Also, fuel oil was lanced directly into the matte at rate of 3 liter on 30 Nm of compressed air per minute.
  • An example of the analysis of the matte in the furnace was 32.5 percent copper, 33.5 percent iron, and 26.4 percent sulfur.
  • the matte was tapped by means of a siphon out of the furnace and as per FIG. 4 was continuously charged into the blister furnace under its gravity. The slag layer in the smelting furnace was maintained at approximately 20 cm thick.
  • Granular silicate, ore and compressed air were lanced into the melt in the blister furnace at a rate of 8 kg and 40 Nm per minutes, respectively.
  • the melt temperature was maintained at 1,250 1,300C by adding scrap metal at a mean rate of approximately 15 kg per minute.
  • the slag layer was adjusted to be maintained at approximately 5 cm thick, and the white metal at 15 cm.
  • the blister copper thereby obtained was continuously'tapped by means of a siphon out of the furnace, while the slag .was caused to overflow out of the blister furnace and was continuously transferred back to the smelting furnace by means of a bubble pump.
  • the rate of production of the blister copper was 20 23 kg per minute.
  • the composition of the blister copper was 97.8 98.9 percent copper, and 0.8 1.7 percent sulfur.
  • composition of the blister furnace slag was 3.5
  • composition of the white metal as sampled from the furnace was 79.0 percent copper, and 20.1 percent sulfur.
  • slag composed of 0.3 0.5 percent copper, about 37 SiO and about 5 (1210 was produced in the smelting furnace at a rate of approximately 37 kg per minute, which was caused to overflow from the furnace.
  • the concentration of the sulfur dioxide in the waste gas was 6 7 percent in the smelting furnace, and 13 14 percent in the blister furnace. Approximately 99 percent of sulfur dioxide to its total quantity was captured. The dust generated was less than 1 percent of the total raw material charged.
  • the matte tapped out of the known smelting furnace and the settling furnace should all be charged directly either into the slagging furnace or the blister furnace of this invention, while the slag either from the slagging furnace or the blister furnace of this invention is simultaneously charged into the settling furnace.
  • the smelting furnace of this invention may be used in conjunction with a known type of smelting furnace.
  • the slag tapped out of either the slagging furnace or the blister furnace of this invention is charged into the smelting furnace of this invention, or, if the known type of smelting furnace used is either the reverberatory furnace or the electric furnace, the slag may be charged into any one of these furnaces.
  • a method for continuous production of blister copper from sulfide copper ores in a smelting unit and an oxidizing unit each controllable in operation independently of the other unit as to compositions of melts therein, temperatures, levels of free surfaces of corresponding slags, and the thickness of the layers of the individual melts therein including the corresponding slag therein, and wherein the rates of production of slag, matte and blister copper and the rate of transfer of matte from the smelting unit to the oxidizing unit and the rates of transfer of blister copper and slag out of the oxidizing unit are maintained in constantequilibrium with the rate of feeding inputs into the smelting unit; the method comprising the steps of:

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US00881226A 1968-12-07 1969-12-01 Method of continuous processing of sulfide ores Expired - Lifetime US3725044A (en)

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JP43089818A JPS523886B1 (xx) 1968-12-07 1968-12-07

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JP (1) JPS523886B1 (xx)
AT (1) AT310459B (xx)
BE (1) BE742693A (xx)
CA (1) CA942052A (xx)
DE (1) DE1961336C3 (xx)
ES (1) ES399166A1 (xx)
FI (1) FI50800C (xx)
FR (1) FR2025600A1 (xx)
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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3857701A (en) * 1973-09-26 1974-12-31 Us Interior Smelting of copper oxides to produce blister copper
US3890139A (en) * 1972-05-04 1975-06-17 Mitsubishi Kizoku Kabushiki Ka Continuous process for refining sulfide ores
US3901489A (en) * 1972-05-04 1975-08-26 Mitsubishi Kizoku Kabushiki Ka Continuous process for refining sulfide ores
US4178174A (en) * 1977-08-24 1979-12-11 The Anaconda Company Direct production of copper metal
WO1980001287A1 (en) * 1978-12-19 1980-06-26 Anaconda Co Direct production of copper metal
US4304595A (en) * 1977-07-22 1981-12-08 Boliden Aktiebolag Method of manufacturing crude iron from sulphidic iron-containing material
EP0487031A1 (en) * 1990-11-20 1992-05-27 Mitsubishi Materials Corporation Process for continuous copper smelting
TR25981A (tr) * 1991-12-17 1993-11-01 Mitsubishi Materials Corp KONTINü BIR SEKILDE BAKIRI TASFIYEETMEK ICIN PROSES.
US5398915A (en) * 1990-11-20 1995-03-21 Mitsubishi Materials Corporation Apparatus for continuous copper smelting
EP0685563A1 (en) * 1994-06-03 1995-12-06 Mitsubishi Materials Corporation Copper smelting apparatus
EP1759024A1 (en) * 2004-04-07 2007-03-07 Ausmelt Limited Process for copper converting
EP2111471A4 (en) * 2004-09-07 2009-10-28 Univ Chile APPARATUS FOR CONTINUOUS FIRE REFINING OF ZINC
WO2015077900A1 (es) 2013-11-28 2015-06-04 Gabriel Angel Riveros Urzúa Método para el procesamiento continuo de mata de cobre o mata de cobre-níquel

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Publication number Priority date Publication date Assignee Title
SE407234B (sv) * 1977-07-22 1979-03-19 Boliden Ab Forfarande for framstellning av ett tillsatsmaterial for rajernsframstellning
FR2444721A1 (fr) * 1978-12-22 1980-07-18 Mo I Stali I Splavov Procede pyrometallurgique de transformation de minerais de metaux non ferreux lourds et four pour la mise en oeuvre dudit procede
CA1190751A (en) * 1982-06-18 1985-07-23 J. Barry W. Bailey Process and apparatus for continuous converting of copper and non-ferrous mattes
JPS62124236A (ja) * 1985-03-04 1987-06-05 インコ、リミテツド 製錬バ−ナ及び製錬方法
JPS6429210A (en) * 1987-07-27 1989-01-31 Maki Sekiya Hair cutting method

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US3326672A (en) * 1963-02-21 1967-06-20 Farnsfield Ltd Refining of metals and alloys
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US3463472A (en) * 1963-02-21 1969-08-26 Conzinc Riotinto Ltd Apparatus for the direct smelting of metallic ores
US3565605A (en) * 1964-02-14 1971-02-23 Siderurgie Fse Inst Rech Process for the continuous refining of metals
US3396011A (en) * 1964-10-12 1968-08-06 Siderurgie Fse Inst Rech Process and apparatus for the continuous refining of ferrous metal and particularly pig iron
US3437475A (en) * 1964-11-23 1969-04-08 Noranda Mines Ltd Process for the continuous smelting and converting of copper concentrates to metallic copper
US3486882A (en) * 1964-12-24 1969-12-30 Siderurgie Fse Inst Rech Continuous steel making process
US3351462A (en) * 1965-01-29 1967-11-07 Anaconda Co Electric furnace smelting of copper concentrates
US3617257A (en) * 1967-03-13 1971-11-02 Inst Derecherches De Lasiderur Process for continuously refining metal

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3890139A (en) * 1972-05-04 1975-06-17 Mitsubishi Kizoku Kabushiki Ka Continuous process for refining sulfide ores
US3901489A (en) * 1972-05-04 1975-08-26 Mitsubishi Kizoku Kabushiki Ka Continuous process for refining sulfide ores
US3857701A (en) * 1973-09-26 1974-12-31 Us Interior Smelting of copper oxides to produce blister copper
US4304595A (en) * 1977-07-22 1981-12-08 Boliden Aktiebolag Method of manufacturing crude iron from sulphidic iron-containing material
US4178174A (en) * 1977-08-24 1979-12-11 The Anaconda Company Direct production of copper metal
WO1980001287A1 (en) * 1978-12-19 1980-06-26 Anaconda Co Direct production of copper metal
US5398915A (en) * 1990-11-20 1995-03-21 Mitsubishi Materials Corporation Apparatus for continuous copper smelting
EP0487031A1 (en) * 1990-11-20 1992-05-27 Mitsubishi Materials Corporation Process for continuous copper smelting
US5217527A (en) * 1990-11-20 1993-06-08 Mitsubishi Materials Corporation Process for continuous copper smelting
TR25981A (tr) * 1991-12-17 1993-11-01 Mitsubishi Materials Corp KONTINü BIR SEKILDE BAKIRI TASFIYEETMEK ICIN PROSES.
EP0685563A1 (en) * 1994-06-03 1995-12-06 Mitsubishi Materials Corporation Copper smelting apparatus
US5511767A (en) * 1994-06-03 1996-04-30 Mitsubishi Materials Corporation Copper smelting apparatus
EP1759024A1 (en) * 2004-04-07 2007-03-07 Ausmelt Limited Process for copper converting
EP1759024A4 (en) * 2004-04-07 2008-10-22 Ausmelt Ltd PROCESS FOR CONVERTING COPPER
AU2005231860B2 (en) * 2004-04-07 2010-11-18 Metso Metals Oy Process for copper converting
USRE44850E1 (en) 2004-04-07 2014-04-22 Outotec Oyj Process for copper converting
EP2111471A4 (en) * 2004-09-07 2009-10-28 Univ Chile APPARATUS FOR CONTINUOUS FIRE REFINING OF ZINC
EP2111471A1 (en) * 2004-09-07 2009-10-28 Universidad de Chile Installation for continuous fire refining of copper
WO2015077900A1 (es) 2013-11-28 2015-06-04 Gabriel Angel Riveros Urzúa Método para el procesamiento continuo de mata de cobre o mata de cobre-níquel

Also Published As

Publication number Publication date
YU44380A (en) 1983-06-30
DE1961336C3 (de) 1974-04-25
YU35922B (en) 1981-08-31
FR2025600A1 (xx) 1970-09-11
MY7400207A (en) 1974-12-31
NO129638B (xx) 1974-05-06
DE1961336A1 (de) 1970-07-02
CA942052A (en) 1974-02-19
SE383900B (sv) 1976-04-05
YU304369A (en) 1980-12-31
ES399166A1 (es) 1974-12-01
BE742693A (xx) 1970-06-05
JPS523886B1 (xx) 1977-01-31
YU34683A (en) 1988-10-31
YU43120B (en) 1989-04-30
GB1297124A (xx) 1972-11-22
AT310459B (de) 1973-10-10
DE1961336B2 (de) 1973-09-06
FI50800B (xx) 1976-03-31
FI50800C (fi) 1976-07-12
YU43651B (en) 1989-10-31

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