JP2009030150A - Treatment reining method for copper-containing raw material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a treatment refining method for a copper-containing raw material by which copper can be efficiently recovered at high grade from industrial waste and waste containing valuables such as copper. <P>SOLUTION: The treatment refining method for a copper-containing raw material comprises at least: a first step where valuable raw materials containing copper, noble metals, nickel, iron, antimony or the like are subjected to molten reduction by a shaft furnace in a coke bed system together with a solvent and cokes to be separated into a molten metal mainly made up of copper and iron and molten slag mainly made up of calcium oxide, silicon dioxide, alumina and iron oxide; and a second step where, after the extraction of the molten metal produced in the first step to an oxidizing furnace in the following step, calcium carbonate is added to the molten metal in the oxidizing furnace, an oxygen-containing gas is blown into the molten metal, and the main impurities such as iron are formed into slag, and are extracted from the furnace. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

The present invention relates to industrial waste, waste containing copper and other valuable materials, incinerated ash obtained by incineration of valuable raw materials containing flammable copper, noble metals, nickel, iron, antimony, etc., copper, noble metals The present invention relates to a processing method for recovering and purifying copper from valuable raw materials containing nickel, iron, antimony, and the like and one or more of copper-containing intermediate raw materials produced from non-ferrous smelting processes.

Conventionally, incineration ash obtained from incineration of industrial waste, waste containing valuable materials such as copper, and valuable raw materials containing flammable copper, noble metals, nickel, iron, antimony, etc., copper, noble metals, Valuable raw materials containing iron, nickel, antimony, etc. are melted together with iron sulfide in a reflection furnace type melting furnace, and copper is recovered as sulfide (hereinafter referred to as copper matte), and the oxide is granulated slag. I was trying.
Here, the obtained copper mat is processed in the converter process of copper smelting, but since the copper quality in this copper mat is as low as 30 to 40 mass-%, the transportation cost to the copper smelter is high, Moreover, in the copper smelting process, since it is a low grade copper raw material, copper productivity was inhibited.
In JP2003-231924 "Method for manufacturing molten metal from waste incineration product and its application" (Patent Document 1), an example of processing a waste incineration product in a gasification melting furnace is described, and the copper grade is It is 30.6mass% from 7.7.

  Specifically, generally in copper smelting, when raw materials with high and low copper grades are used, the smelting cost per unit raw material is not much different, so profits are greatly influenced by the amount of copper bullion recovered, and copper grades It is more advantageous to process a raw material with a high content.

: JP 2003-231924

In addition, since the copper mat described above has a large content of impurities such as iron, there are adverse effects such as worsening the slag properties and increasing the slag amount in the converter process for treating the copper mat.

In addition to noble metals such as copper, gold, and silver, and iron, antimony, etc. in addition to nickel, there is a need for the development of technology that efficiently removes these impurities and recovers copper with the quality of crude copper. Yes.
Of the impurities other than copper, noble metals and nickel in the raw material, iron, zinc, lead, etc. can be removed relatively easily with oxygen-containing air, etc., but antimony is difficult to remove. Then, the rate of transfer of valuable metals such as nickel and noble metals to slag increased, and it was difficult to efficiently remove impurities.

  The present invention has been made in view of such circumstances, industrial waste, waste containing valuable materials such as copper, and valuable raw materials containing combustible copper, noble metals, nickel, iron, antimony, etc. High quality and efficient copper from incineration ash obtained by incineration, valuable raw materials containing copper, noble metals, nickel, iron, antimony, etc., and copper-containing intermediate materials produced from non-ferrous smelting processes A method for treating and purifying a copper-containing raw material that can be recovered is provided.

The present invention solves the above problems,
(1) A valuable raw material containing copper, noble metal, nickel, iron, antimony, etc., together with a solvent and coke,
Smelting reduction is performed in a coke bed type furnace of vertical type furnace,
A first step of separating a molten metal mainly composed of copper and iron and a molten slag mainly composed of calcium oxide, silicon dioxide, alumina, and iron oxide;
After the molten metal produced in the first step is extracted to the oxidation furnace in the next step, calcium carbonate is added to the molten metal in the oxidation furnace, and an oxygen-containing gas is blown into the molten metal to remove major impurities such as iron. A method for treating and purifying a copper-containing raw material having at least a second step of slag formation and extraction from the furnace.
(2) In addition to the step (1), a sodium-containing agent is added to the molten metal generated in the second step, and an oxygen-containing gas is blown into the molten metal, so that nickel in the molten metal A method for treating and purifying a copper-containing raw material having at least a third step of efficiently extracting antimony from soda slag and extracting it from the oxidation furnace with little loss of valuable metals such as precious metals.
(3) In addition to the above step (2), in order to reduce and remove oxygen dissolved in the molten metal produced in the third step, a reducing gas is blown into the molten metal, and then a copper anode is cast. The processing refinement | purification method of the copper containing raw material which has a 4th process to do.
(4) The valuable raw material according to any one of (1) to (3) above, wherein a copper-containing intermediate produced from a non-ferrous smelting process or an industrial waste treatment process is screened, and the raw material under the sieve is a group Mining and processing the sieve directly in a vertical furnace,
In the briquetting process, the raw material moisture is 6 to 13 mass-%, the binder is added and mixed with 3 to 8 mass-% based on the weight of the raw material, and the copper-containing raw material is refined by the briquetting machine.
(5) A method for treating and purifying a copper-containing raw material, in which the coke ratio is melt-reduced at a mass ratio of 20 mass-% or more in the melt-reduction step according to any of (1) to (4).

(6) above (1) from the first step according to any one of (5), if the slag of _{CaO-SiO 2 -Al 2 O 3} 3 -way system, which is the main component was 100Mass-%,
Calcium oxide: 30-50 mass-%,
Silicon dioxide: 27-40 mass-%,
Alumina: A method for treating and purifying a copper-containing raw material by adding a solvent (calcium carbonate, silicate ore, etc.) to the raw material in the range of 12 to 38 mass-%, and melting and reducing it.
(7) In the second step according to any one of (1) to (6) above,
Slag composition is iron oxide: 55-80 mass-%,
Calcium oxide: 15-40 mass-%,
Copper oxide: A method for treating and purifying a copper-containing raw material, wherein calcium carbonate is added so as to be 0 to 20 mass-%.
(8) In the second step according to any one of (1) to (7) above,
Air is blown into the molten metal at a temperature in the range of 1200 to 1450 ° C. until the iron grade in the molten metal phase is 0.1 wt% or less, so that the metal becomes 0.5 to 1 L / min / kg-metal. Processing and purification method for copper-containing raw materials.

(9) Since the iron oxide-based slag produced by the second step according to any one of (1) to (8) above contains a valuable metal such as copper, the slag in the first step A method for treating and purifying copper-containing raw materials by recovering valuable metals such as copper by repeated treatment.
(10) In the third step described in any one of (2) to (9) above, sodium hydroxide is added in a molar ratio of 7 times or more with respect to the amount of antimony in the molten metal, and the temperature is from 1,150 to A method for treating and purifying a copper-containing raw material in which the antimony quality in the molten metal phase is 0.02 mass-% or less by blowing air or oxygen into the molten metal at a temperature of 1,250 ° C.

The present invention has the following effects.
(1) Incineration ash obtained by incineration of industrial waste, waste containing valuable materials such as copper, and valuable raw materials containing flammable copper, noble metals, nickel, iron, antimony, etc., copper, noble metals By melting and reducing the valuable raw materials containing nickel, iron, antimony, and the like and the copper-containing intermediate produced from the non-ferrous smelting process, the copper grade in the molten metal can be concentrated to 60 mass-% or more.
(2) In the second step, iron in the molten metal can be efficiently oxidized and removed,
It is possible to reduce the loss of slag to valuable metals such as nickel and noble metals in the molten metal, and to lower the iron quality to 0.1 mass-% or less.
(3) The recovery rate of valuable metals such as copper lost in the oxidized slag produced in the second process can be increased by repeating the oxidized slag produced from the second process in the first process.
(4) In the third step, antimony in the molten metal can be efficiently removed without peroxidation, and soda slag containing antimony can be used as an antimony recovery raw material.
(5) Since it becomes possible to improve the copper quality directly from industrial waste and low-grade copper-containing scrap to the copper anode quality, it is no longer necessary to treat the copper mat that was conventionally produced from the melting furnace. It is possible to increase the copper anode production capacity from ore.
(6) There is no need to transport the copper mat to the copper smelter, and the transportation cost can be reduced.

Next, the method for treating and purifying the copper-containing raw material of the present invention will be described more specifically with reference to the flow sheet of FIG.
The treatment object of the present invention includes industrial waste, waste containing valuable materials such as copper, incineration ash obtained by incineration of valuable raw materials containing combustible copper, noble metals, nickel, iron, antimony, etc. , A valuable raw material containing copper, noble metal, nickel, iron, antimony, and the like, and one or more of copper-containing intermediates produced from the non-ferrous smelting process.

Of these raw materials, industrial waste, raw materials containing combustible copper and other valuable materials, and waste containing valuable materials such as copper are incinerated ash incinerated in advance in an incinerator and valuable materials such as copper and precious metals such as electronic parts materials Sieving materials, industrial waste soot, burning husks, and intermediates containing copper in non-ferrous smelting process, 3-8 mass for the sieving raw material binder to the sieving raw material weight After adding water and mixing so that the moisture in the raw material is in the range of 6 to 13 mass-%, the mineral mineral is produced with the briquetting machine.
At this time, if the addition rate of the binder and the water addition rate are out of this range, problems such as a decrease in the formation rate of the group mineral and a decrease in the strength of the group mineral occur. Is preferred.

This group mineral and the above-mentioned raw material on the sieve and / or calcium carbonate and silicate ore are smelted and reduced together with coke in a coke bed type smelting reduction furnace of a vertical furnace. The slag phase and the metal phase are separated in a smelting reduction furnace, the molten slag in the furnace is extracted while being granulated, and the molten metal is extracted in an oxidation furnace in the next step.

In the second deironing process, the molten metal extracted into the oxidation furnace contains iron in a high concentration in the range of 0 to 40 mass-%, so the melting point of the molten metal may exceed 1,430 ° C. is there. Further, in the second step of oxidizing iron in the molten metal, when it is over-oxidized, a hardly meltable magnetite is generated and the viscosity of the slag is increased, so that the calcium oxide quality in the slag becomes 15 to 40 mass-%. Calcium carbonate is added. If the quality of calcium oxide is out of this range, the melting point of the slag becomes high, so it is preferable to adjust to this range. Then, in the molten metal so that the air quality becomes 0.5-1L / min / kg-metal in the temperature range of 1,200-1,450 ° C until the iron grade in the molten metal is 0.1 mass-% or less. Slag is extracted from the oxidation furnace.

In the third deantimony step, after extracting the oxidized slag of the second step, sodium hydroxide is added in a molar ratio of 7 times or more with respect to the amount of antimony in the molten metal, and then the air or oxygen is melted. It is possible to efficiently oxidize and remove antimony from the molten metal without increasing the rate of transfer of valuable metals such as nickel and noble metals to slag, and quality equivalent to the anode for copper electrolysis can be obtained. After oxidizing and purifying the antimony grade in the molten metal to 0.02 mass-% or less, the molten metal and molten soda slag are separated.

  In the fourth step, LPG and air are mixed until the oxygen grade in the metal obtained from the third step is 0.15 mass-% or less, and blown into the molten metal to reduce and remove oxygen, A copper anode for copper electrolysis is cast.

  Since the oxidized slag obtained in the second step described above contains copper oxide in which a part of the molten copper is oxidized, iron oxide, and calcium oxide, the copper is recovered from the slag, In order to effectively use as a solvent in the process, it is repeated in a smelting reduction furnace.

Next, the present invention will be further described using examples.
(Example 1-5, Comparative Example 1-2)
Add 5mass-% binder to 180kg of industrial waste incineration ash, mix, and then add water so that the water content is in the range of 5.2 mass-% to 14.1 mass-%. After mixing, ore was formed. The group mineral discharged from the grouping machine is passed through a 10 mm sieve and sieved, and the weight of the molded product of 10 mm or more on the sieve and the unmolded product of less than 10 mm under the sieve are weighed, and the formula (1) is used. The molding rate at the time of mining was calculated.
Molding rate (mass-%) = [Molded product weight] ÷ [Molded product weight + Unmolded product weight] x 100 (1)
Moreover, in order to evaluate the strength of the group mineral, the drop strength and the crushing strength of the group mineral were measured. The drop strength is dropped 3 times from a drop height of 1 m onto a concrete floor, the sample after dropping is screened with a 10 mm sieve, and the residue on the sieve is dropped again onto the concrete floor from a drop height of 1 m. It evaluated by the weight ratio (mass-%) until it falls three times. Furthermore, the crushing strength used the strength measured value using a compression tester. The results are shown in Table 1.

As shown in Table 1, under the condition of moisture 5.2 mass-% in Comparative Example 1, the molding rate was 84%, which was a considerably low result. The drop strength repeatedly dropped the briquette mineral and was damaged, and the residual rate decreased to 31%. Also, the crushing strength was as low as 309 N, and no strong mineral mineral was obtained at a moisture of 5.2 mass-%.
As shown in Examples 1 to 5, a high molding rate of 90% or more was obtained in all cases where the moisture during briquetting was 6 to 13 mass-%. Further, the strength of the group mineral was 99% or more in the drop test, and the crushing strength was 500N or more.
Under the condition of moisture 14.1 mass-% in Comparative Example 2, the molding rate was 86.2 mass-% and 90 mass-% or less, and the crushing strength was 556 N, but the drop strength was lower than 90 mass-%.

(Example 6-7, Comparative Example 3-4)
Next, in order to grasp an appropriate binder addition rate at the time of briquetting, the influence of the binder addition rate at the time of briquetting was tested. In addition, after mixing so that the raw material water | moisture content at the time of a mine might be 10 mass-%, the mine was carried out. The results are shown in Table 2.

As shown in Comparative Example 3, when the binder addition rate was 2 mass-%, the molding rate was as low as 85.2%, and both the drop strength and the crush strength were low. Moreover, when the binder addition rate of Comparative Example 4 was 10 mass-%, the amount of the binder was large and the raw material adhered to the roll tire of the briquetting machine, and the molding rate was as low as 78 mass-%.
Under the conditions of the binder addition rates of 3 mass-% and 8 mass-% in Example 6 and Example 7, the molding rate was 90 mass-% or more, and high strength results were obtained for both drop strength and crush strength.
From the results of Examples 1 to 7 described above, it was found that the raw briquette conditions were good in the range of 6 to 13 mass-% moisture and 3 to 8 mass-% binder addition rate.

(Examples 8 and 9)
Next, 37.5 kg of raw material (26.5 kg briquette, 11 kg of sieve material) and 12.5 kg of calcium carbonate were simultaneously charged into a vertical coke bed type smelting reduction furnace, and then 10 kg of coke (crude mineral, sieve) Smelting reduction was carried out under the respective conditions of a coke ratio of 20 mass-%) and 12.5 kg (coke ratio of 25 mass-%) with respect to the total amount of the upper raw material and calcium carbonate. The temperature of the slag discharged from the smelting reduction furnace in the first step was 1400 ° C. or higher, and the separability between metal and slag was good in the smelting reduction furnace.
The coke ratio is defined by the formula shown below.
Coke ratio = [coke input amount] ÷ [raw material amount + solvent amount] x 100 (%)

(Comparative Example 5)
In Examples 8 and 9, the slag temperature was 1320 ° C. or lower as a result of smelting reduction under the condition that the coke was reduced to 9 kg (coke ratio 18 mass-%), the slag fluidity deteriorated, and the metal suspended in the slag. The amount of turbidity increased.
From the above results, it was found that a coke ratio of 20 mass-% or more is good in the smelting reduction furnace in the first step.

(Example 10)
In a coke bed type smelting reduction furnace, the raw material and the solvent (calcium carbonate) are mixed at an appropriate mixing ratio, and after adding 50 kg per time, coke 10 kg / time (coke ratio 20 mass-%) The melt reduction treatment was continued for 3 hours or more.
In addition, the mixing ratio of the solvent differs depending on the raw material composition, and was performed while adjusting the basicity of slag (= [CaOmass-%] / [SiO ₂ mass-%]).
As a result, when the sum of _{CaO-SiO 2 -Al 2 O 3} 3 -way system which is a major component of the slag and 100Mass-%, calcium oxide: 30~50mass-%, silicon dioxide: 27~40mass-%, alumina The range of from 12 to 38 mass-% was good, and when the slag composition was preferably CaO / SiO ₂ = 0.85 to 1.2, slag having good fluidity was obtained.

(Example 11)
Next, after extracting about 300 kg of molten metal produced from the smelting reduction furnace into the oxidation furnace, calcium carbonate was added so that the molten metal in the oxidation furnace had an appropriate slag composition, and from the tuyere of the oxidation furnace Air was blown in. The amount of calcium carbonate added varies depending on the metal composition obtained from the smelting reduction furnace, but the composition of the produced slag when the iron grade in the metal is 0.1 mass-% or less is 55-80 mass-% iron oxide, The range of calcium oxide 17 to 40 mass-% and copper oxide 0 to 20 mass-% was obtained. With this range of slag composition, slag having good fluidity was obtained.

(Comparative Example 6)
In Example 11, the slag having a calcium oxide grade of 17 mass-% or less and an iron oxide grade of 80 mass-% or more in the slag under the condition where the amount of calcium carbonate added is reduced, the melting point of the slag becomes 1350 ° C. or more. The slag fluidity deteriorated.
Moreover, when the quality of calcium oxide in the slag was increased, the melting point of the slag was increased, a semi-melt was generated in the furnace, and the separation between the metal and the slag deteriorated.
From the above results, the slag composition in the second step is in the range of iron oxide 55-80 mass-%, calcium oxide 17-40 mass-%, copper oxide 0-20 mass-%, so that the metal is suspended in the slag. Loss was suppressed.

Example 12
In Example 11, while controlling the furnace temperature to be in the range of 1200 to 1450 ° C., air was blown into the molten metal at a flow rate of 0.5 to 1 L / min / kg-metal, and the molten metal was poured at each time. Sampling was performed, and iron, copper, and nickel in the metal were analyzed. The result is shown in FIG.

From FIG. 3, the iron quality in the metal decreased with the oxidation time, and the copper quality increased from about 80 mass-% to over 95 mass-%. When the oxidation treatment is continued for 60 minutes, the iron quality in the metal becomes 0.1 mass-% or less, nickel in the metal begins to be oxidized, and the nickel loss to the slag increases.
Therefore, it is desirable to stop the oxidation treatment before 60 minutes have elapsed.
In addition, when the molten metal temperature is lower than 1200 ° C., the fluidity of the molten slag decreases, and when it exceeds 1450 ° C., the oxidation of copper proceeds rapidly and the melting damage of the tuyere bricks becomes remarkable. .
Therefore, in the second oxidation step, the processing temperature is preferably in the range of 1200 ° C. to 1450 ° C., and the oxidation is terminated when the iron quality in the metal becomes 0.1 mass-% or less, thereby reducing the slag. The nickel loss to the is reduced. The slag after oxidation was iron oxide (Fe ₂ O ₃ conversion) grade 57 mass-%, calcium oxide grade 19 mass-%, and copper grade 7.5 mass-%.

(Example 13)
Next, in the coke bed smelting reduction furnace of the vertical furnace in the first step, the raw material of the copper grade 3.8 mass-% oxidized slag produced from the second oxidation step 5 kg / time, the average copper grade 16 mass-% 34 kg (= group mineral 24 kg, raw material on the sieve 10 kg) / time and calcium carbonate 11 kg / time at the same time, then coke 10 kg / time continuously, at a frequency of 5-7 times per hour The smelting reduction treatment was continued for 3 hours or more. The amount balance of copper at that time is shown in Table 3.

From Table 3, as a result of processing 816 kg of raw material and 120 kg of oxidized slag (copper amount 4.6 kg) in a smelting reduction furnace, the copper quality in the produced slag was 0.4 mass-%, the copper amount was 3.4 kg, Less than the amount of copper in the slag.
Therefore, copper can be recovered from the oxidized slag by repeating the oxidized slag in the smelting reduction furnace.

(Examples 14-15)
Finally, in order to efficiently remove antimony from the metal oxide produced from the second oxidation step, molten metal oxide (antimony grade 0.12 mass-%, nickel grade 0.82 mass-%, silver grade 0.19 mass) -%) Sodium hydroxide was added 7 to 8 times in molar ratio to about 250 kg of antimony in the metal oxide. The temperature was in the range of 1150 to 1250 ° C., and oxidation purification was performed by blowing air into the molten metal at a flow rate of 0.8 L / min / metal-kg for 30 minutes. The results are shown in Table 4.

As shown in Examples 14 and 15 shown in Table 4, when sodium hydroxide is added 7 times or more in molar ratio with respect to the amount of antimony, antimony quality equivalent to an anode for copper electrolysis (0.02 mass-% or less) Of crude copper was obtained.

(Comparative Example 7-8)
In Comparative Example 7, it was oxidized and purified under the same conditions as in Example 14 except that the amount of sodium hydroxide added was 6 times the molar ratio of antimony, but the antimony quality in the crude copper was 0.04 mass. It only dropped to-%.
In Comparative Example 8, oxidation purification was performed under the same conditions as in Example 14 except that sodium hydroxide was not added and the air blowing time into the molten metal was 72 minutes. As a result, the quality of antimony in crude copper is reduced only to 0.08 mass-%, conversely the nickel quality is reduced to 0.14 mass-% and the silver quality is reduced to 0.14 mass-%. The slag loss was high.

From the above results, in order to reduce the loss of valuable metals such as nickel and noble metals from the crude copper and to lower the antimony grade in the crude copper to the anode grade for copper electrolysis, sodium hydroxide is 7 times the molar ratio of antimony. It has been found that it is sufficient to add the above and oxidize and purify in the temperature range of 1150 to 1250 ° C.

FIG. 1 shows one aspect of the processing flow of the present invention. FIG. 2 shows one aspect of the processing flow of the conventional method. FIG. 3 is a graph showing the relationship between the oxidation time in the second step of Example 12 and the quality of copper, iron, and nickel in the metal.

Claims (10)

A valuable raw material containing copper, noble metal, nickel, iron, antimony, etc., together with solvent and coke,
Smelting reduction is performed in a coke bed type furnace of vertical type furnace,
A first step of separating a molten metal mainly composed of copper and iron and a molten slag mainly composed of calcium oxide, silicon dioxide, alumina, and iron oxide;
After the molten metal produced in the first step is extracted to the oxidation furnace in the next step, calcium carbonate is added to the molten metal in the oxidation furnace, and an oxygen-containing gas is blown into the molten metal to remove major impurities such as iron. A method for treating and purifying a copper-containing raw material, comprising at least a second step of slag formation and extraction from a furnace. In addition to the step of claim 1, by adding a sodium-containing agent to the molten metal produced in the second step and blowing an oxygen-containing gas into the molten metal, valuables such as nickel and noble metals in the molten metal A method for treating and purifying a copper-containing raw material, characterized by having at least a third step in which metal loss is small and antimony is efficiently converted into soda slag and extracted from the oxidation furnace. In addition to the process of claim 2, in order to reduce and remove oxygen dissolved in the molten metal generated in the third process, a fourth process of casting a copper anode after blowing a reducing gas into the molten metal. A process for purifying a copper-containing raw material, characterized by comprising: The valuable raw material according to any one of claims 1 to 3, wherein a copper-containing intermediate produced from a non-ferrous smelting process or an industrial waste treatment process is sieved, and the raw material under the sieve is briquetted, The above is when processing directly in the vertical furnace.
In the above briquetting process, the raw material moisture is 6 to 13 mass-%, and the binder is added and mixed with 3 to 8 mass-% based on the weight of the raw material. Treatment purification method. 5. A method for treating and purifying a copper-containing raw material according to claim 1, wherein in the smelting reduction step according to claim 1, smelting reduction is performed at a coke ratio of 20 mass-% or more. If in the first step according to claims 1 to claim 5, and the slag of _{CaO-SiO 2 -Al 2 O 3} 3 -way system which is a major component and 100Mass-%,
Calcium oxide: 30-50 mass-%,
Silicon dioxide: 27-40 mass-%,
Alumina: A method for treating and purifying a copper-containing raw material, wherein a solvent (calcium carbonate, silicate ore, etc.) is added to the raw material in the range of 12 to 38 mass-%, and then melt-reduced. In the second step according to any one of claims 1 to 6,
Slag composition is iron oxide: 55-80 mass-%,
Calcium oxide: 15-40 mass-%,
Copper oxide: A method for treating and purifying a copper-containing raw material, wherein calcium carbonate is added so as to be 0 to 20 mass-%. In the second step according to any one of claims 1 to 7,
Air is blown into the molten metal at a temperature in the range of 1200 to 1450 ° C. until the iron grade in the molten metal phase is 0.1 wt% or less, so that the metal becomes 0.5 to 1 L / min / kg-metal. A method for treating and purifying a copper-containing raw material. Since the iron oxide-based slag produced by the second step according to any one of claims 1 to 8 contains valuable metals such as copper, it is repeatedly processed in the smelting reduction furnace of the first step. A method for treating and purifying a copper-containing raw material, characterized in that valuable metals such as copper are recovered at the same time. In the third step according to any one of claims 2 to 9, sodium hydroxide is added in a molar ratio of 7 times or more with respect to the amount of antimony in the molten metal, and the temperature is 1,150 to 1,250 ° C. In this range, an antimony grade in the molten metal phase is 0.02 mass-% or less by blowing air or oxygen into the molten metal.