JPS5948939B2 - Complex continuous processing method and device for multi-metal raw materials - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to non-ferrous metallurgy, more particularly to copper-zinc concentrates, copper-lead-zinc concentrates, slags containing zinc and lead, lead, zinc, antimony and other volatile materials. The present invention relates to a method and apparatus for the composite processing of multi-metal raw materials such as refined products containing chemical components.

The method of the present invention can process various metal raw materials to obtain metals in good yield.

Various methods are known in the art for processing copper concentrates and multimetallic concentrates.

For example, methods are known for processing ores and concentrates containing non-ferrous metals and rare metals (US Pat. No. 3,555
No. 164, British Patent No. 1186088, Canadian Patent No. 869477 and Swedish Patent No. 335232).

According to this known method, the raw material to be treated and oxygen are fed into a cyclone chamber in which oxidation, melting and partial sublimation of the volatile components occur, and from there the melt is passed to an electric furnace. , in which non-ferrous metals are processed.

Since the sublimation rate of zinc in this method is less than 0.5 kg per minute per m3 of solution, it is necessary to increase the area of the electric heating furnace, which increases the equipment cost and the electric power consumption rate.

The melting chamber and electric furnace are separated by a cooled bulkhead to prevent sulfur dioxide from entering the electric furnace.

The electric furnace has a condensation chamber, and condenses the metal vapor that sublimes when the slag is electrothermally treated.

Liquid or solid fuels can be added to treat low oxide content.

Various vaporization methods are also known for extracting the metals contained in multimetal raw materials and zinc slag.

For example, methods of vaporizing slag using liquid fuel are known (British Patent No. 1161164, Belgian Patent No. 24366 (No. 138)).

This method involves mixing liquid fuel with air and mixing the resulting mixture with 1
The slag to be treated is blown into the slag to be combusted at a pressure of 5 atmospheres or more.

This method is used for lead, tin and copper slags.

It is also known to blow liquid slag with gaseous reducing compounds produced by combustion of a mixture of liquid fuel and air (Canadian Patent No. 832,278).

Here, the zinc sublimation rate is 1 to 5 k/min per m3 of solution.
It is g.

This method does not slag the slag from waste.

This method releases large amounts of gas which must be fully utilized and requires the provision of boiler equipment and filter bags.

Furthermore, this method is intermittent rather than continuous.

Another method for electrothermal treatment of slag is also known (USSR Inventor's Certificate No. 145755).

Here, the raw material waste slag is heated to a temperature of 1350 to 1400.
Melt in the range of °C and add 3-5% reducing agent, 10-15% pyrite concentrate and 10% lime.

During melt processing, copper and other precious metals are transferred into the copper-poor matte, and zinc, cadmium and rare metals are sublimed.

The zinc sublimation rate for this method is less than 1 kg per minute per m''.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a method for complex continuous processing of multi-metal raw materials that can be efficiently melted even if they contain sulfides and oxides.

The treatment of copper-zinc sulfide concentrates according to the invention involves burning and melting a portion of the sulfides in an atmosphere of oxygen or oxygen-enriched air in a cyclone or flame to form sulfur dioxide. A gas rich in content, a matte rich in copper, and a slag containing zinc are obtained.

The gas chamber of the furnace and the metal bath are separated by a partition wall.
When the resulting zinc slag is blown with a low-temperature plasma jet, reduction takes place at a high rate adapted to the flame melting rate of the raw material, and the zinc vapor generated is either condensed as liquid metal or sublimated as oxide.

When processing oxide raw materials, for example zinc slag, the melting is carried out in an elastic or slightly oxidizing medium in a melting chamber with electrodes, such as in an ore melting furnace, to prevent reduction or sublimation of the zinc. .

Here, all the electricity is used for slag melting, so the specific capacity of the concentrate chamber is large and the electricity consumption rate is small.

The melting chamber does not need to be separated from the rest of the furnace equipment, simplifying equipment installation and maintenance.

The zinc in the solution is sublimated in the second chamber of this installation by the action of a plasma jet in a reducing atmosphere, as well as by melting the sulfide raw material.

Another object of the invention is to bring a reducing plasma jet into intimate contact with an oxide-containing solution to promote reduction of component metals.

Since this method of processing introduces an additional delay in reduction due to diffusion, the solution is agitated by a plasma jet to prevent the delay in reduction due to diffusion and increase the rate of reduction.

Another object of the present invention is to reduce metal oxides by reacting natural gas with air or oxygen using a plasma jet, and using oxides of carbon and water, which have a high reducing power when produced, to reduce metal oxides and reduce zinc oxide. The purpose is to significantly accelerate the removal of metal vapor generated from the solution.

It is a further object of the present invention to use a nitrogen plasma to agitate the slag bath to eliminate the diffusion resistance of the bath and to promote sublimation of the zinc.

Another object of the present invention is to provide a coke layer on the surface of the liquid to act as an oxygen scavenger for the slag.

A plasma jet blows slag into the gas chamber and spreads it over the coke surface.

Also, coke consumption is low (strictly Zn 10C-+Z
It is used very effectively in the process because it is stoichiometric (for the reaction of n00 CO) and it is only necessary to feed the coke to the surface of the bath.

A further object of the invention is to provide an apparatus for the process of melting raw material, obtaining a gas rich in sulfur dioxide, sublimating zinc from the solution and condensing the vapor in the form of liquid metal or oxide. The objective is to minimize size and therefore minimize heat loss.

Since the sulfide burns and melts as it is, the solution can be appropriately heated, thereby reducing power consumption.

When using separate equipment, cooling of the solution in the overflow is unavoidable, but since the solution is overheated, there is no risk of this happening.

The zinc vapor produced enters the condensation chamber through the shortest path.

This condensation chamber provides better condensation and reduces the amount of return product.

The sublimation chamber of this device has a low temperature plasma generator.

This generator has its nozzle immersed in the solution and directs a plasma jet into the reaction area.

Additionally, this plasma jet provides the necessary agitation of the solution, thereby accelerating the reduction reaction and intensifying the overall reaction.

Still another object of the present invention is to determine the optimal position of the low temperature plasma generator, thereby effectively controlling the agitation.
The purpose is to extend the life of the walls of the reduction chamber.

The viscosity of the slag depends on its composition and temperature, and the generator requires changing its position in the bath depending on the viscosity of the slag.

Yet another object of the invention is to provide an apparatus in which the nozzle can be moved vertically and submerged to various depths in the bath.

This allows the degree of stirring to be varied depending on the gas pressure, the viscosity of the solution, and the extent to which the solution is spread onto the coke.

The object of the present invention is to provide an improved process for the complex continuous treatment of multimetal oxides and sulfides which does not have the disadvantages of the known processes.

Another object of the invention is to provide an effective apparatus for carrying out the above method.

The main object of the present invention is to vary the reaction conditions under which zinc is reduced and sublimated from the slag solution, thereby adapting the reaction rate to the melting rate of the raw materials and by-products in the most intensive melting process.

These and other objects of the present invention are directed to a two-step continuous processing process for multimetallic raw materials, particularly copper-zinc compositions, in which the starting materials are melted in a first stage and reductive melting is carried out in a second stage. The first stage of melting is carried out in a gas atmosphere containing free oxygen, and the second stage of reductive melting, which processes the obtained solution, uses a gas plasma jet at a temperature of 4000 to 5000°C to heat the surface of the solution. 1500-160
This can be achieved by a composite continuous processing method for multi-metallic substances, which is characterized by reducing while maintaining the temperature at 0°C.

This makes it possible to provide a method for effectively treating raw materials containing sulfides and oxides.

First, when copper-zinc sulfide concentrates are processed, the sulfur in these sulfides is combusted in an atmosphere of oxygen or oxygen-enriched air in a flame or cyclone, and the combustion produces sulfides. The concentrate is melted to produce sulfur dioxide-rich gas, copper-rich matte and zinc-containing slag.

The gas chamber of the surface equipment and the metal bath are separated by a partition wall, and when the resulting zinc slag is blown with a low-temperature plasma jet, reduction occurs at a high rate that adapts to the melting rate of the raw material, and the generated zinc The vapor is either condensed as a liquid metal or sublimated as an oxide, the latter being further refined as an aqueous solution.

Second, when processing oxide raw materials, such as zinc slag, the melting is carried out in an elongated or slightly oxidizing atmosphere in a melting furnace with electrodes, such as an ore melting furnace, to reduce or reduce the zinc. Prevent sublimation.

Since all the input power is used for melting the slag, the specific capacity is large and the power consumption is small.

The melting chamber does not need to be separated from the rest of the furnace equipment, simplifying the equipment and maintenance of the equipment.

Similar to the melting of the sulfide raw material, the zinc in the solution is sublimated in a reducing atmosphere in the second chamber of this installation by the action of a plasma jet.

The effect obtained by the present invention is that as a result of treating the solution with a plasma torch formed by a reducing or neutral gas, the sublimation rate of zinc from the solution increases rapidly by 5 to 10 times compared to the electrothermal method, and All ingredients are slag (
Copper - 0.5% or less, zinc - 0.2% or less, lead - 0.1%
and tin - 0.2% or less) to a specific blast flow rate of 1720 or less (10% during the combustion process) compared to the slag combustion method.
40m instead of 00 to 1400rn”/l slag
3/l slag).

According to an embodiment of the invention, the method is characterized in that during reductive melting, a plasma jet is blown into the solution to agitate the solution so as to reduce the metal oxides in the solution.

This facilitates the reduction of the metal by bringing the reducing gas stream into intimate contact with the oxygen-containing solution.

Further, since reduction is additionally delayed by diffusion during the reaction, stirring the solution eliminates the delay due to diffusion and significantly accelerates reduction.

According to another embodiment of the invention, the method is characterized in that natural gas is used as plasma-forming gas.

Natural gas is reacted with air or oxygen using a plasma jet, and metal oxides are reduced using oxides of carbon and water, which have a particularly strong reducing power during generation, and the metal vapor generated from the reduction of zinc oxide and the solution. significantly promotes the removal of

According to yet another embodiment of the invention, the method is characterized in that nitrogen is used as plasma-forming gas.

This allows the nitrogen produced as a by-product of the oxygen plant to be used to bubble the metal bath, overcoming the diffusion resistance of this bath and significantly accelerating the sublimation of the zinc.

A further embodiment of the invention is characterized in that a coke layer is formed on the surface of the solution during the reduction treatment.

Thereby, the thin layer of coke on the surface of the bath acts as an active reducing agent for the flow of slag that is blown into the gas chamber by the bubbling gas and spread over the surface of the coke.

Also, coke consumption is low (strictly ZnO+C-+Z
It is used very effectively in processing because it is stoichiometric for the reaction of n + Co) and it is only necessary to feed coke to the surface of the bath.

According to a further embodiment of the invention, an apparatus for carrying out the proposed method comprises a melting chamber for melting the raw material and its metal oxide, and a metal vapor condensation chamber connected to the melting chamber and via a gas duct I. an apparatus having at least one plasmatron in the lining of said reduction-sublimation chamber, the nozzle of said plasmatron being constantly immersed in said solution; It is characterized by the injection of plasma jet.

This allows the device to minimize its size and correspondingly minimize heat losses to achieve the intended purpose, namely melting the raw material, obtaining a sulfur dioxide-rich gas, evaporating the zinc from the solution, and The vapor can be condensed in the form of liquid metal or powdered sublimate.

Since the sulfide burns and melts as it is, the solution can be appropriately heated, thereby reducing the power consumption of the plasmatron.

When using separate equipment, cooling of the overflowing solution is unavoidable, but since the solution is heated, there is no risk of this happening.

The generated zinc vapor enters the condensation chamber through the shortest path;
This condensation chamber provides better condensation and reduces the amount of return product.

A plasmatron in the sublimation chamber has its nozzle immersed in the solution and directs a jet of plasma into the reaction zone.

Additionally, this plasma jet provides the necessary agitation of the solution, thereby accelerating the reduction reaction and intensifying the overall reaction.

According to a further embodiment of the invention, the device according to the invention is provided with one or several parallel plasmatrons, the plasmatrons being able to adjust their position relative to the walls of the sublimation chamber, and the surface of the solution It is characterized by being set at an acute angle with respect to.

This makes it possible to select the position of the plasmatron so as to maximize the stirring effect of the solution, thereby extending the life of the sublimation chamber.

The viscosity of the slag depends on its composition and temperature, and depending on the viscosity of the slag, it is necessary to place the plasmatron at various positions in the bath.

Furthermore, the apparatus of the present invention is characterized in that it is provided with a mechanism for moving the nozzle of the plasma 1-ron in the solution so as to stir the solution during reduction, and a means for supplying coke to the surface of the solution in the sublimation chamber. shall be.

This allows the nozzle of the plasmatron to be moved vertically to different depths in the solution to control the degree of bubbling depending on the pressure of the gas, the viscosity of the solution, and the extent to which the solution is spread onto the coke. It can be changed.

Embodiments of the invention will now be described in further detail, by way of example, with reference to the accompanying drawings.

The composite continuous treatment method for multi-metal sulfides according to the present invention is a method in which multi-metal sulfide concentrates are melted in an oxygen stream in a cyclone or stacker.

After separation of the sulfur-rich gas from the dust, it is used in the production of sulfuric acid or sulfur elements.

The solution separates into slag, matte and metal in the melting chamber depending on its specific gravity.

The metals mentioned above are tapped from the melting chamber.

At this time, the slag is placed in a second sublimation chamber, where it is stirred and volatile components are reduced and sublimated by the action of a reducing plasma jet.

The sublimated vapor of the volatile metal reaches a condensation chamber where it becomes liquid metal or burns to form an oxidized sublimate.

Plasma is formed from natural gas or nitrogen.

In the latter case, coke is supplied to the sublimation chamber.

When processing multi-metal oxide raw materials or metallurgical by-products, they are melted in the electrically heated section of the apparatus and the molten slag is then processed in the same manner as the multi-metal raw materials.

The method for processing multimetallic raw materials according to the present invention is capable of melting sulfide, sulfur-free ores, concentrates, and metallurgical by-products.

Sulfides, such as copper-zinc concentrate, are melted as a vertical flame in a cyclone furnace, either neat or with the addition of combustion.

Oxides, such as zinc-containing slag, are melted in the electrically heated section of the device.

The solution obtained as described above enters a reduction chamber, which is separated from the melting chamber by an isolation, where the solution is subjected to the reducing action of a plasma jet or, in the case of a nitrogen plasma, agitated the solution. Moreover, the surface of the solution is covered with a coke layer and reduced.

In the apparatus of FIG. 1, there is a melting chamber 1, which includes a solid raw material supply device 2, a melting device for the raw material to be treated, namely an electrode 3, a gas duct 4 for removing gas from the melting area, and a mat. There are a tap hole 5, a metal tap hole 6, and a partition wall 7 that separates chamber 1 from chamber 8 and removes metal from the slag.

In the metal separation chamber 8, a plasmatron 9 that generates low-temperature plasma, a sealing member 10, a coal supply device 11, a slag tapping hole 12, and a chamber 14 for condensing metal separated from slag are connected to the chamber 8. There is a gas duct 13.

In the condensing chamber 14 there is a distribution device 15 and a gas duct 16.

In another embodiment of the apparatus of FIG.
7 is connected to the metal separation chamber 18 via a channel 19.

If the zinc is an oxide, the apparatus has an oxidation chamber 20, shown in FIG. 3, in which the metal vapor separated from the slag is oxidized.

The oxidation chamber 20 can be mounted on a thermal expansion compensating roll 21 as shown in FIG.

When treating sulfide or fuel-containing raw materials, it is suitable to burn them as they are or to burn them with the addition of fuel, but a cyclone 22 shown in FIG. 4 is provided as a device for melting the raw materials to be treated. Thereby, either a syringe 23 is provided to supply the feedstock, or a stacker 24 as shown in FIG. 5 is provided and a burner 25 is provided to combust and melt the feedstock.

These devices operate as follows.

1, 2 and 3, fuel-free oxides, such as slag containing zinc or other volatile metals, are fed by the feeding devices of each device.

This raw material enters the melting chamber 1, where it is melted by an electrode immersed in the slag, and then enters the metal separation chamber 8,
Here, zinc is separated as vapor and sublimated by the action of the reducing gas generated by the low-temperature plasma generator.

The steam enters the condensing chamber 14 where it cools and accumulates as a liquid, releasing the zinc.

When using nitrogen plasma, use the metal separation chamber 8 in Figure 1.
Coke is supplied to the surface of the solution through the supply device 2.

When volatile metals are to be recovered in oxide form, the zinc vapor is admitted to a steam oxidation chamber 20 in FIG.

The non-ferrous metals are extracted and reduced and the molten slag is continuously or periodically tapped from the metal separation chamber 8 through the slag tapping hole 12.

When collecting metal or mats, the first
Metal tap hole 6 or mat tap hole 5 of melting chamber 1 shown in the figure
The hot water is released periodically through the bath.

This treatment can also be carried out in the melting chamber 1 under reduced pressure and in a non-reducing atmosphere.

In this case, the melting chamber 1 does not need to be sealed, and the electrode 3 can be left unsealed at the ceiling.

In this case it is possible to use electrodes that spontaneously weld with the metal shell of the furnace.

This means that the melting chamber does not require special electrical power, thereby increasing the melting capacity.

The separation of the equipment into two zones, the melting zone and the sublimation zone, ensures that the temperature of the solution in the first, larger zone is below the melting point of the raw material to be treated, and that the solid raw material fed onto the melt bath is layer, which can significantly reduce the loss of melting chamber heat through the walls, floor and ceiling of the furnace.

The low temperature plasma generator 9 can adjust the flow rate, pressure and temperature of reducing or neutral gas and power consumption.

This low-temperature plasma generator 9 can be mounted on the walls and ceiling of the metal separation chamber 8 at right angles or at an acute angle to the surface of the solution, and can also be moved at an angle to each other in a vertical or horizontal plane. I can do it.

This device 9 can be submerged to various depths in the solution.

This device 9 can be provided with suitable operating mechanisms.

In order to prevent wear and tear on the wall linings of the melting chamber 1 and the metal separation chamber 8, the ducts and partitions connecting the chambers can be surrounded and cooled with water or other heat transfer medium.

The sulfide concentrate processing apparatus shown in FIG. 4 operates as follows.

Dry sulfide concentrate or other fuel-containing material is blown with a flux through the injector 23 of the cyclone 22 by a jet of oxygen or oxygen-enriched air.

The feedstock melts due to the heat generated by the sulfide oxidation exothermic reaction or the combustion of the fuel fed to the cyclone.

The molten feedstock then passes through the cyclone walls and enters the melting chamber 26.

The generated gas is removed from the gas duct for further processing.

The solution entering the melting chamber 26 forms layers depending on the specific gravity of the components.

For example, in the processing of materials containing zinc, lead and copper, the metallic lead formed accumulates in the hearth, the copper mat forms a layer directly on top of the lead, and the zinc-containing slag becomes the top layer.

The depth of the solution is maintained such that the partition walls 28 are always submerged to the slag layer.

In this device, gas cannot mix between the melting chamber 26 and the reduction chamber 29, but the solution can be exchanged freely.

When lead and matte accumulate, they are periodically tapped out through the lead tap hole 30 and the mat tap hole 31.

The slag is continuously or intermittently tapped from the slag extraction hole 32.

Reduction occurs within the reduction chamber 29.

The apparatus of FIG. 5 operates as follows.

The feedstock is oxidized and melted by a vertical burner 25 mounted on a stacker 24.

Volatile metals are sublimated by the reaction between the low-temperature plasma generated in the plasmatron 33 and the slag solution, or the reaction between the slag solution stirred by the nitrogen low-temperature plasma and coke.

The reduced vapor passes through the gas duct 34 and enters the condensation chamber 35 where the metal changes from vapor to liquid or into a third
The metal vapor enters the oxidation chamber 20 for after-combustion in the figure, where it becomes an oxide.

The present invention has the following advantages.

(1) The processing efficiency according to the present invention is increased by 2 to 3 times, and the area of the electric furnace is reduced by 90%.

(2) Sulfide and oxide raw ores are extensively utilized in modern continuous processing processes, carried out in one unit, to produce valuable dissolved products and waste slag.

Next, the present invention will be explained in detail.

Example 1 Treatment of multimetallic concentrate with 7-25% copper and 7-25% copper
A copper-zinc concentrate containing 25% zinc sulphide was dried to a moisture content of 0% and fed at a rate of 1 ton per hour to a bin placed on the side of the furnace.

The crushed quartz is then added to the concentrate and blown by a burner integrated into the stacker or tangentially into the cyclone chamber, tangentially with a flow of oxygen at a rate of 200 m'' per tonne of feedstock.

A gas containing 75% sulfur dioxide is used for the production of sulfuric acid, and the matte and slag solutions form layers according to the specific gravity of the components.

The mat sinks and accumulates at the bottom, and when it exceeds a level of 200 mm, hot water is released.

The slag forms the upper layer of the solution bath and enters the reduction sublimation chamber.

Here, a plasma jet is sprayed onto the slag.

When slag accumulates, it is tapped out through a hole located 500 mm above the bottom of the furnace.

The total level of solution in the furnace is 700-750 mm.

Zinc vapor enters the condensing chamber, and the zinc bath at the bottom is spread as particulate metal throughout the condensing chamber by an impeller.

The temperature inside the condensing chamber is maintained at 500°C, so the steam is rapidly cooled and prevented from being oxidized by water vapor and carbon dioxide.

The air supplied to the sublimation chamber oxidizes the sublimate, so that after cooling the gas the resulting oxide can be collected in a filter bag.

Example 2 Treatment of zinc-containing slag includes 1-1.5% copper, 2
．． Granular slag consisting of slag waste containing up to 5% lead and 8-15% zinc is dried in a tube furnace, which is fed into the melting chamber of an electric furnace with a capacity of 1 ton per hour, and the electrodes are placed in the slag The slag is heated by soaking it in water.

The furnace does not need to be sealed; the atmosphere inside this furnace is neutral.

The level of the solution bath is at a height of 750 mm.

The solution is introduced into the reduction-sublimation section of the equipment, where it is exposed to a plasma jet.

When using a nitrogen plasma jet, it supplies crushed dry coke, and when using natural gas, it produces carbon black and hydrogen, which reduces the zinc oxide.

Zinc vapor enters the condensation or combustion chamber, while the slag, as it accumulates, exits through holes corresponding to the slag.

Example 3 Melt of Multimetallic Concentrate A copper-zinc concentrate containing 5-25% copper and 5-25% zinc is mixed with quartz ore containing 75% silica and moistened in a tube furnace. It is dried to a content of 1% and sent by an air conveyor to a bin placed above the furnace equipment, from which the charge at a rate of 1 ton per hour is sent to a stacker by means of a feeder, producing a volume of 200 m3 per ton of charge. Oxygen is sent to the stacker in proportion and the charge is blown into the cyclone.

The charge is now melted and flows down along the walls of the cyclone into the melting chamber at a temperature of 1250-1300°C.

After 75% of the sulfur dioxide is removed from the gas using a water-cooled standpipe and an electric filter, it is mixed with other gases and used to produce sulfuric acid.

In the melting chamber, a mat containing 50% copper of the solution and 1
0% zinc, up to 1% copper, 20-25% iron and 3
Form a layer with slag containing 0-35% silica.

The slag fills the space after the bulkhead forming the reduction sublimation portion of the installation.

The plasmatron has a length of 200 mm, which is necessary to stir the solution.
The nozzle is submerged to a depth of , and the specific velocity of the gas is 1.3 m3 per minute per m3.

The zinc content of the solution is 0.5-0.7% from the initial 10%.
lower to

Zinc is reduced at a rate of 10 kg/min/m''.

Coke of 1.5-2% of the weight of the slag is fed into the reduction chamber.

The steam and gas mixture is injected into a condensation chamber where the zinc vapor is condensed and the gas is combusted.

The gas is compressed and used for heating purposes.

The heating energy reaches 3000 Cal/m8.

When using nitrogen as plasma-forming gas, the zinc yield reaches 80%.

The remainder is condensed and returned to the charge as a return product and melted.

When the steam burns, it draws in air 10 to 15 times the volume of the gas to cool it.

Separate the claw seats in the gas with a filter bag.

This claw seat contains 65% zinc and up to 12% lead.

Using natural gas as the plasma-forming gas, this gas reacts in the plasmatron so that the zinc is reduced by the appropriate amount of carbon black and hydrogen produced during this reaction, without the need to add coke to the solution.

The gas flow rate, fuel yield and gas processing method are the same as in the previous example, but the yield of metallic zinc does not exceed 75% and the remainder is returned product.

Example 4 Molten lead of zinc-containing slag Molten slag contains up to 1.5% copper, 15% zinc, 2%
Contains up to lead, 23-25% iron, 20-25% silica and up to 20% calcium oxide, moisture content 0
．． Dry to 5%, 1000KV at a rate of 1 ton per hour
A Supply to the melting chamber of electric furnace.

The furnace has three electrodes.

The obtained solution fills the space behind the partition wall and is caused to act on a plasma having the same characteristics as described above.

A matte containing 20-25% copper is separated in the melting chamber of the furnace.

The gas is separated from the claw seat and discharged into the atmosphere.

The final slag contains 0.5-1% zinc, 0.1% lead and 0.3% copper.

Condensation is carried out in the same manner as in the melting of concentrate.

[Brief explanation of drawings]

FIG. 1 shows a multi-metal complex continuous processing apparatus having a partition wall that completely separates the gas space, FIG. 2 shows a multi-metal complex continuous processing apparatus having a channel connecting two melting zones, and FIG. Figure 4 shows a multi-metal composite continuous processing equipment with a final combustion chamber for the produced steam, Figure 4 shows a multi-metal composite continuous processing equipment with a melting cyclone, and Figure 5 shows a multi-metal composite continuous processing equipment with a melting stacker. It is a continuous processing device. 1, 17. 26... Melting chamber, 2...
・Solid raw material supply device, 3... Electrode, 4. 13
．． 16. 34... Gas duct, 5, 31.
...Mat tap hole, 6...Metal tap hole,
7, 28... Partition wall, 8, 18... Metal separation chamber, 9, 33... Plasmatron, 10.
... Sealing member, 11 ... Coal supply device,
12... Slag tap hole, 14.35...
- Condensation chamber, 15... Bending spreader, 19... Channel, 2o... Oxidation chamber, 21... Roll, 22... Cyclone, 23...・Curved syringe,
24...stacker, 25...burner,
29...Reduction sublimation chamber, 30... Lead tapping hole, 32... Slag extraction hole.

Claims (1)

[Claims] 1. In a two-step sequential processing method for multi-metal raw materials in which starting materials are melted in the first step and reductive melting is performed in the second step, the first step melting is performed in a gas atmosphere containing free oxygen. The second stage of reductive melting, in which the obtained solution is treated, is characterized by using a gas plasma jet at a temperature of 4000 to 5000°C to reduce the surface of the solution while maintaining the temperature at 1500 to 1600°C. A complex continuous processing method for multi-metal raw materials. 2. The composite continuous processing method for multi-metal raw materials according to claim 1, characterized in that, while reducing the metal oxide that is a component of the solution, a plasma jet is blown into the solution to create bubbles. 3. The composite continuous processing method for multi-metal raw materials according to claim 1, characterized in that natural gas is used as the plasma forming agent. 4. The composite continuous processing method for multi-metal raw materials according to claim 1, characterized in that nitrogen is used as the plasma forming agent. 5. The composite continuous processing method for multi-metal raw materials according to claim 1, wherein a coke layer is provided on the surface of the solution while reducing the metal oxide that is a component of the solution. 6 It has a melting chamber and a reduction/sublimation chamber, the melting chamber melts a raw material and accumulates metal oxides that are components of this raw material, and the reduction/sublimation chamber is connected to the melting chamber and releases metal vapor through a gas duct. In a two-stage continuous processing apparatus for multi-metal raw materials connected to a compaction chamber, the reduction-sublimation chamber is provided with means for supplying coke to the surface of the solution, and at least one plasmatron is connected to the inside of the reduction-sublimation chamber. A multi-metal raw material having a nozzle that is always immersed in the solution so that the plasmatron blows a plasma jet into the solution, agitates the solution, and reduces it. complex continuous processing equipment. 7. The plasmatron consists of one or several parallel plasmatrons, the plasmatron can be adjusted in position relative to the wall of each reduction-sublimation chamber, and is set at an acute angle to the surface of the solution. , a complex continuous processing apparatus for multi-metal raw materials according to claim 6. 8. The composite continuous processing apparatus for multi-metal raw materials according to claim 6, further comprising a mechanism for moving the plasma 1 heron in the layer of the solution.