KR20050085402A - Method for treating slag - Google Patents
Method for treating slag Download PDFInfo
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- KR20050085402A KR20050085402A KR1020057010244A KR20057010244A KR20050085402A KR 20050085402 A KR20050085402 A KR 20050085402A KR 1020057010244 A KR1020057010244 A KR 1020057010244A KR 20057010244 A KR20057010244 A KR 20057010244A KR 20050085402 A KR20050085402 A KR 20050085402A
- Authority
- KR
- South Korea
- Prior art keywords
- copper
- slag
- leaching
- treatment method
- slag treatment
- Prior art date
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- 239000002893 slag Substances 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title claims abstract description 30
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 60
- 239000010949 copper Substances 0.000 claims abstract description 59
- 229910052802 copper Inorganic materials 0.000 claims abstract description 56
- 238000003723 Smelting Methods 0.000 claims abstract description 18
- 239000012141 concentrate Substances 0.000 claims abstract description 17
- 238000004519 manufacturing process Methods 0.000 claims abstract description 7
- 238000002386 leaching Methods 0.000 claims description 16
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 14
- 238000001556 precipitation Methods 0.000 claims description 6
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 claims description 4
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonium chloride Substances [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 2
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 2
- 230000001580 bacterial effect Effects 0.000 claims description 2
- 238000005868 electrolysis reaction Methods 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 claims description 2
- 238000000622 liquid--liquid extraction Methods 0.000 claims description 2
- 238000000638 solvent extraction Methods 0.000 claims description 2
- 239000000725 suspension Substances 0.000 abstract description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 15
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 6
- 238000002474 experimental method Methods 0.000 description 6
- 239000007789 gas Substances 0.000 description 6
- 229910052742 iron Inorganic materials 0.000 description 6
- 239000001301 oxygen Substances 0.000 description 6
- 229910052760 oxygen Inorganic materials 0.000 description 6
- 239000002244 precipitate Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- MBMLMWLHJBBADN-UHFFFAOYSA-N Ferrous sulfide Chemical compound [Fe]=S MBMLMWLHJBBADN-UHFFFAOYSA-N 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- OMZSGWSJDCOLKM-UHFFFAOYSA-N copper(II) sulfide Chemical compound [S-2].[Cu+2] OMZSGWSJDCOLKM-UHFFFAOYSA-N 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000010907 mechanical stirring Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 229910052976 metal sulfide Inorganic materials 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000001139 pH measurement Methods 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 239000010970 precious metal Substances 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 229910052569 sulfide mineral Inorganic materials 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
Classifications
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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
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/04—Working-up slag
-
- 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
- C22B15/0054—Slag, slime, speiss, or dross treating
-
- 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
- C22B15/0047—Smelting or converting flash smelting or converting
-
- 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
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/006—Wet processes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
Description
본 발명은 조동 (blister copper) 의 제조시 발생하는 슬래그 (slag) 를 처리하기 위한 청구항 제 1 항의 전제부에 기재된 방법에 관한 것이다.The present invention relates to the method described in the preamble of claim 1 for treating slag that occurs in the production of blister copper.
어떠한 경계 조건으로, 자용로 (flash smelting furnace) 등의 부유물 반응기 (suspension reactor) 에서 일단계로 직접 황화 정광에서 조동을 제조하는 것은 경제적으로 현명한 것이다. 조동을 직접 제조할 시 가장 주목할만한 문제점중으로는 구리의 슬래그화 및 대량의 슬래그 발생이다. 구리의 충분한 회수를 보장하기 위해서, 슬래그 내의 구리양은 슬래그의 청정에 의해 회수되어야 한다. 이러한 슬래그의 양 이외에도, 다른 문제점으로서는 황화 정광의 연소로 발생하는 대량의 열 (heat) 이다. 이 경우에, 공정 공기에 낮은 산소 부화 (enrichment) 를 사용하고, 즉 공정 공기내에 포함된 질소를 가열하여 열적으로 경제적인 균형을 맞춘다는 것이다. 하지만, 이는 대량의 공정 가스를 발생시키고, 이로 인해 이 공정 가스는 대형의 노(furnace) 공간 내에서 또한 무엇보다도 대량의 가스 처리 장치내에서 발생하게 된다.In any boundary condition, it is economically wise to produce crude copper in a sulphide concentrate in one step in a suspension reactor, such as a flash smelting furnace. One of the most notable problems when producing crude copper directly is the slag of copper and the generation of large amounts of slag. In order to ensure sufficient recovery of copper, the amount of copper in the slag must be recovered by cleaning the slag. Besides this amount of slag, another problem is the large amount of heat generated by the combustion of sulphide concentrate. In this case, a low oxygen enrichment is used in the process air, ie the nitrogen contained in the process air is heated to achieve a thermally economical balance. However, this generates a large amount of process gas, which causes this process gas to occur in a large furnace space and above all in a large amount of gas treatment apparatus.
정광 중 구리 함량이 충분히 높은 경우에, 즉 통상적으로 적어도 37% 의 Cu 가 있는 경우에, 블리스터 (blister) 는 일단계로 직접 경제적으로 생성될 수 있다. 일반적으로, 정광의 열적 수치가 낮아질수록, 정광의 구리 함량이 높아진다. 높은 구리 함량으로 인해, 황화철 광물의 점유는 낮다. 전술한 정광의 처리시, 충분히 높은 산소 부화물이 사용될 수 있고, 이로 인해 가스양이 적절하게 유지될 수 있다. 또한, 구리 함량이 낮은 정광은, 철 함량이 낮다면 조동의 생성에 적합하고, 이 경우에 생성된 슬래그의 양은 상당히 많지 않다.In the case where the copper content in the concentrate is sufficiently high, that is, when there is typically at least 37% Cu, blisters can be produced directly and economically in one step. In general, the lower the thermal value of the concentrate, the higher the copper content of the concentrate. Due to the high copper content, the occupation of iron sulfide minerals is low. In the treatment of the above concentrate, a sufficiently high oxygen enrichment can be used, whereby the amount of gas can be properly maintained. In addition, concentrates with a low copper content are suitable for the production of crude copper if the iron content is low, in which case the amount of slag produced is not significantly high.
핀란드 특허출원 제 982818 호에서는, 제련 반응기 내에서 정광 이외에, 냉각되고 연마된 구리 물질로 실시되는 조동을 제조하는 방법에 대하여 개시되어 있다. 현재에는, 종래의 방법보다 제조된 조동의 양에 비례하여 슬래그의 양이 적어지게 생성된다. 또한, 현재에는 슬래그내의 구리 손실도 감소된다. 생성된 슬래그는 일단계로 또는 바람직하게는 2 단계의 슬래그 청정 공정으로 추가로 처리된다. 2 단계의 슬래그 청정 방법은 2 개의 전기로 (electric furnace) 또는 하나의 전기로와 슬래그 정광 플랜트를 포함한다. 전기로 내에서, 슬래그는 코크스 (coke) 에 의해 감소되어, 슬래그상 (slag phase) 내에 결합된 귀금속이 감소되어 슬래그층 바로 아래에서 별개의 구리상으로서 분리된다. 이 경우에, 슬래그는 슬래그 정광 플랜트 내에서 처리되고, 슬래그 정광은 제련 반응기 안으로 되돌아갈 수 있다. 조동은 양극로 (anode furnace) 내에서 정련된다.Finnish patent application 982818 discloses a process for producing a crude copper which is carried out in a smelting reactor, in addition to concentrates, which is cooled and polished copper material. At present, less slag is produced in proportion to the amount of coarse copper produced than the conventional method. In addition, copper losses in the slag are now reduced. The resulting slag is further processed in one step or preferably in a two step slag cleaning process. The two-stage slag cleaning method includes two electric furnaces or one electric furnace and a slag concentrate plant. In an electric furnace, slag is reduced by coke, so that the precious metal bonded in the slag phase is reduced and separated as a separate copper phase directly below the slag layer. In this case, the slag is processed in the slag concentrate plant and the slag concentrate can be returned into the smelting reactor. The coarse copper is refined in an anode furnace.
슬래그를 전기로 내에서 일단계로 처리하여, 슬래그 내의 구리양이 경제적으로 근소하다면, 블리스터 내의 철 함량이 여전히 높아서 전로 (converter) 내에서 별도의 블리스터 처리를 종종 필요로 한다. 일방법으로는, 생성된 조동을 양극로 내에서 대량의 블리스터와 함께 처리하는 전기로 전처리 방법이 있으나, 이는 여전히 슬래그 내에 구리가 많이 남게되어 경계적인 이유로 정광-기술 수단에 의해 회수되어야 한다.If the slag is treated in one step in an electric furnace, if the amount of copper in the slag is economically small, the iron content in the blister is still high and often requires a separate blister treatment in the converter. In one method, there is an electric furnace pretreatment method in which the generated coarse copper is processed together with a large amount of blisters in the anode furnace, but this still leaves much copper in the slag and must be recovered by concentrate-technical means for boundary reasons.
도 1 은 본 발명에 따른 공정도이다.1 is a process chart according to the present invention.
본 발명의 목적은 정광으로부터 직접 조동을 제조할 시에 발생하게 되는 슬래그를 처리하는 신규의 방법을 도입하는 것이다. 본 발명의 특별한 목적은 전반적으로 경제적인 면에서 보다 효율적이고 보다 유리한 방식으로 조동의 생성시 슬그래화된 구리를 회수하는 것이다.It is an object of the present invention to introduce a novel method for treating slag that occurs when producing crude copper directly from concentrates. It is a particular object of the present invention to recover copper that has been slaked in the production of crude copper in a more efficient and more advantageous manner overall economically.
본 발명은 청구항 제 1 항의 특징부에 기재된 것을 특징으로 한다. 본 발명의 다른 바람직한 실시형태는 나머지 청구항에 기재된 것을 특징으로 한다.The invention is characterized by what is stated in the characterizing part of claim 1. Other preferred embodiments of the invention are characterized by what is stated in the remaining claims.
본 발명에 따른 방법은 많은 유리한 점을 가지고 있다. 당해 방법에 따라서, 정광으로부터 직접 조동의 제조시에 발생하는 슬래그 내에 포함된 구리를 회수하는 것이 바람직하다. 본 발명의 방법은 구리의 회수를 간단하게 하고, 또한 개선된 불순물 제어를 가능하게 한다. 습식제련 슬래그 내에 포함된 구리를 회수하는 것은 전기로에 비하여 에너지 소모를 감소시켜 준다. 추가로, 건식제련식 회수에 비하여 가스 및 먼지 배출이 감소된다.The method according to the invention has many advantages. According to this method, it is preferable to recover the copper contained in the slag generated during the production of crude copper directly from the concentrate. The method of the present invention simplifies the recovery of copper and also enables improved impurity control. Recovering copper contained in the wet smelting slag reduces energy consumption compared to an electric furnace. In addition, gas and dust emissions are reduced compared to dry smelting.
이하 본 발명은 첨부된 도면을 참조하여 보다 자세히 설명된다.Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.
도 1 에서는, 구리를 회수하기 위해서, 자용로 등의 부유물 제련로 내에서 제조된 조동의 생성시 발생된 슬래그, 즉 블리스터 슬래그 (blister slag) 를 처리하기 위한 본 발명에 따른 방법을 도시하였고, 이 경우에 슬래그의 적어도 일부는 1 이상의 단계로 침출된다. 구리 정광, 용제 및 산소 부화 공기는 자용로 등의 부유물 제련로 내에서 제련 단계 (1) 로 유입된다. 건조된 정광 입자는 고온의 부유물 내에서 산소 부화 공기와 신속하게 반응한다. 반응물 내에서 방출되는 에너지는 공정에 사용된다. 황의 일부는 이산화황으로 산화되고, 철은 산화철로 산화되어, 용제와 함께 슬래그를 발생시킨다. 반응 생성물은 부유물 제련로의 바닥상에 2 개의 별개의 용융상, 즉 조동과 블리스터 슬래그를 생성하며 침전된다. 이 공정으로 발생한 가스는 공지된 방식으로 추가로 처리된다. 부유물 제련로내에 생성된 조동은 양극로 처리 단계 (2) 로 이행되어, 공지된 방식으로 정련되어 양극 구리로 주조된다.1 shows a method according to the present invention for treating slag, i.e. blister slag, generated during the production of crude copper produced in a suspended smelting furnace, such as a porcelain furnace, for recovering copper. In this case at least part of the slag is leached in one or more stages. Copper concentrate, solvents and oxygen-enriched air enter the smelting stage 1 in a suspended smelting furnace such as a magnetic furnace. The dried concentrate particles react quickly with the oxygen enriched air in the hot suspension. The energy released in the reactants is used in the process. Some of the sulfur is oxidized to sulfur dioxide, and iron is oxidized to iron oxide, producing slag with the solvent. The reaction product is precipitated on the bottom of the suspended smelting furnace, creating two separate melt phases, the crude copper and the blister slag. The gas generated in this process is further treated in a known manner. The coarse copper produced in the float smelting furnace is transferred to the anode treatment step (2), which is refined in a known manner and cast into anode copper.
제련 단계 (1) 에서 생성된 블리스터 슬래그는, 제공된 라운더 (launders) 등의 순환 채널을 통하여 부유물 제련로 외부로 빠져나오게 되고, 블리스터 슬래그 내에 포함된 구리를 회수하기 위해 추가로 처리된다. 우선, 블리스터 슬래그는 조립화 및 연마 단계 (3) 로 이행된다. 조립화된 블리스터 슬래그는 보다 반응적인 표면을 얻도록 예를 들어 습식 연마로 소정의 입자 크기로 연마된다. 침출 단계 (4) 에서, 블리스터 슬래그에 함유된 금속이 침출된다. 하기 실시예에 따르면, 침출 단계 (4) 는 황산에 의해 산화 상태에서 실행되므로, 구리 황화물이 생성된다. 첨가되는 황산의 양은 슬래그 1kg 당 500g - 900g 이 바람직하다. 또한, 침출은 암모니아 용액, 염화물 용액 또는 박테리아 침출에 의해 실행될 수 있다. 침출 단계 후, 금속 황화물을 포함하는 용액으로부터, 구리가 구리 침전 단계 (5) 에서 분리된다. 수산화물 침전에서, 구리는 석회암에 의해 침전되며, 생성된 구리를 갖는 침전물은 제련 단계 (1) 로 다시 안내된다. 황화물 침전에서, 구리는 황화수소에 의해 침전되며, 생성된 구리를 갖는 침전물은 제련 단계 (1) 로 다시 안내된다. 또한, 구리는 액-액 추출 (liquid-liquid extraction) 및 전해에서 음극(cathode) 구리로서 회수될 수 있다.The blister slag produced in the smelting step (1) exits the float smelting furnace through a circulation channel such as provided launders and is further processed to recover the copper contained in the blister slag. First, the blister slag is transferred to the granulation and polishing step (3). The granulated blister slag is ground to the desired particle size, for example by wet polishing, to obtain a more reactive surface. In the leaching step 4, the metal contained in the blister slag is leached. According to the following example, the leaching step 4 is carried out in an oxidized state with sulfuric acid, whereby copper sulfide is produced. The amount of sulfuric acid added is preferably 500 g-900 g per kg of slag. The leaching can also be carried out by ammonia solution, chloride solution or bacterial leaching. After the leaching step, copper is separated from the solution containing the metal sulfide in the copper precipitation step (5). In hydroxide precipitation, copper is precipitated by limestone and the precipitate with the resulting copper is led back to the smelting step (1). In sulfide precipitation, copper is precipitated by hydrogen sulfide and the precipitate with the resulting copper is led back to the smelting step (1). Copper can also be recovered as cathode copper in liquid-liquid extraction and electrolysis.
(실시예)(Example)
상기 방법을 변경하기 위하여, 뚜껑이 있는 2리터의 내산(acid-proof) 반응기에서 황산에 의한 용액 실험을 실행하였다. 반응기에는 4개의 플로우 배플링 플레이트 (flow baffling plate), 1개의 리플럭스 응축기(condenser) 및 교반기(agitator) 가 설치된다. 반응기에서, 또한 연속 pH 측정, 온도 조절기 및 하면에 산소 기포를 발생시키는 교반기 블레이드가 연결된다. 가열 판이 가열용으로 사용된다.To modify the method, a solution experiment with sulfuric acid was run in a 2-liter acid-proof reactor with a lid. The reactor is equipped with four flow baffling plates, one reflux condenser and an agitator. In the reactor, there is also connected a continuous pH measurement, a temperature controller and an agitator blade to generate oxygen bubbles at the bottom. Heating plates are used for heating.
실험의 시작시, 슬래그 200g 이 물로 침출되며, 물의 양은 1리터 미만이다. 모든 실험에서, 물의 전체 양과 첨가된 황산은 정확히 1리터이다. 용액의 온도는 90℃이다. 실험에 첨가되는 황산 (H2SO4) 의 양은 806g/1000g 슬래그이다. 전체 실험 주기중 침출단계는 6시간이며, 실험중 기계적 교반(약 770 회전/분) 및 산소(0.5 리터/분)가 적용된다.At the start of the experiment, 200 g of slag are leached into the water and the amount of water is less than 1 liter. In all experiments, the total amount of water and sulfuric acid added is exactly 1 liter. The temperature of the solution is 90 ° C. The amount of sulfuric acid (H 2 SO 4 ) added to the experiment is 806 g / 1000 g slag. The leaching step of the entire experimental cycle is 6 hours, during which mechanical stirring (about 770 revolutions per minute) and oxygen (0.5 liters per minute) are applied.
강한 황산(함유량 약 95 중량%) 이 점차적으로 첨가되며, 동시에 온도는 90℃로 조절된다. 모든 산(acid) 이 공급되면, 반응 시간의 측정이 시작된다. 실험의 개시 후 0, 2, 4 및 6 시간 경과될 때, 슬러리 샘플을 취한다. 샘플의 침출액 및 침전물에서, 구리 (Cu) 와 철 (Fe) 이 분해된다.Strong sulfuric acid (content about 95% by weight) is added gradually, while the temperature is adjusted to 90 ° C. Once all the acid has been supplied, the measurement of the reaction time begins. Slurry samples are taken when 0, 2, 4 and 6 hours have elapsed since the start of the experiment. In the leachate and precipitate of the sample, copper (Cu) and iron (Fe) are decomposed.
처음에 침출된 슬래그는 구리를 32.5 % 함유하고, 철을 23.9% 함유한다. 그것에 기초하여 얻어진 분석 및 침출 수율은 하기 표와 같다.The first leached slag contains 32.5% copper and 23.9% iron. The analysis and leaching yield obtained based on it are as follows.
최종 침전물의 양은 77.4g 이며, 구리의 함량은 3.1%이며, 이는 용액에서 총 구리 수율은 96.3% 임을 의미하는 것이다.The final precipitate is 77.4 g and the copper content is 3.1%, which means that the total copper yield in the solution is 96.3%.
서냉 (slow cooling) 대신에, 용융 상태로부터 직접 물에 의해 조립화되는 슬래그를 위해 유사한 조건에서 실험이 반복되므로, 얻어진 제품은 상응하는 조직을 갖는 미립(granule) 으로 미세하게 쪼개진다. 유사한 조건에서 구리에서 얻어진 전체 침출 수율은 95.8%이며, 이는 분석의 정확성을 고려한다면, 서냉된 슬래그에서와 동일한 상태이다.Instead of slow cooling, the experiments are repeated under similar conditions for slag assembled by water directly from the molten state, so that the obtained product is finely divided into granules with corresponding tissues. Under similar conditions, the total leaching yield obtained from copper is 95.8%, which is the same as in slow cooled slag, given the accuracy of the analysis.
용액으로부터, 구리는 산성도를 조절함으로써 선택적으로 침전되므로, 철이 제 1 단계에서 침전되고, 구리가 제 2 단계에서 침전되며, 이에 의해 소망하지 않는 철이 구리로부터 분리될 수 있다.From the solution, copper is selectively precipitated by adjusting the acidity, so iron is precipitated in the first stage, copper is precipitated in the second stage, whereby unwanted iron can be separated from the copper.
당업자라면, 본 발명의 바람직한 실시예는 예시만을 위한 것이며, 첨부된 특허 청구범위 내에서 변경될 수 있음을 알 수 있다. Those skilled in the art will appreciate that the preferred embodiment of the present invention is for illustration only and may be changed within the scope of the appended claims.
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| KR101389430B1 (en) * | 2012-08-23 | 2014-04-25 | 엘에스니꼬동제련 주식회사 | The recovery method of valuble metals included in converter slag at copper smelter |
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| FI116686B (en) | 2003-07-17 | 2006-01-31 | Outokumpu Oy | Method for melting copper ligands |
| EP2053137A1 (en) * | 2007-10-19 | 2009-04-29 | Paul Wurth S.A. | Recovery of waste containing copper and other valuable metals |
| FI120157B (en) * | 2007-12-17 | 2009-07-15 | Outotec Oyj | A process for refining copper concentrate |
| CN102605191B (en) | 2012-04-16 | 2013-12-25 | 阳谷祥光铜业有限公司 | Method for directly producing row copper by copper concentrate |
| KR101502592B1 (en) * | 2013-04-12 | 2015-03-16 | 주식회사 삼삼 | slag treatment method for extracting silic and magnesia |
| JP6363035B2 (en) * | 2015-02-27 | 2018-07-25 | 独立行政法人国立高等専門学校機構 | Copper slag treatment method |
| RU2614293C2 (en) * | 2015-06-04 | 2017-03-24 | Общество с ограниченной ответственностью "Институт Гипроникель" | Method of low-autogenous raw material processing in flash smelting furnaces |
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| US2693405A (en) * | 1952-06-20 | 1954-11-02 | Sherritt Gordon Mines Ltd | Method of separating copper values from and ammoniacal solution |
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| US3928551A (en) * | 1970-07-27 | 1975-12-23 | American Cyanamid Co | Leaching polyelectrolyte fluidized solids |
| DE2348005A1 (en) * | 1972-09-25 | 1974-07-25 | Albright & Wilson | PROCESS FOR THE EXTRACTION OF COPPER AND / OR ZINC FROM WASTE |
| US4034063A (en) * | 1974-03-22 | 1977-07-05 | Industrial Resources, Inc. | Process for control of SOx emissions from copper smelter operations |
| US4152142A (en) * | 1977-02-28 | 1979-05-01 | Kennecott Copper Corporation | Recovery of copper values from iron-containing ore materials as mined and smelted |
| US4484730A (en) * | 1982-09-30 | 1984-11-27 | Iso "Metalurgkomplekt" | Device for leaching copper from slags |
| NO156724C (en) * | 1983-07-08 | 1987-11-11 | Elkem As | PROCEDURE FOR EXPLOITING THE COPPER CONTENT IN SULPHIDIC ORE AND CONCENTRATES. |
| US5616168A (en) * | 1994-02-28 | 1997-04-01 | Kennecott Utah Copper Corporation | Hydrometallurgical processing of impurity streams generated during the pyrometallurgy of copper |
| MXPA02006652A (en) * | 2000-01-04 | 2002-09-30 | Outokumpu Oy | Method for the production of blister copper in suspension reactor. |
| CA2363969C (en) * | 2001-11-26 | 2009-01-13 | Walter Curlook | Process for the recovery of residual metal values from smelter waste slags, and from converter slags |
| FI114808B (en) * | 2002-05-03 | 2004-12-31 | Outokumpu Oy | Process for the processing of precious metal |
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| PE20040630A1 (en) | 2004-11-11 |
| US20060037435A1 (en) | 2006-02-23 |
| AU2003283455A1 (en) | 2004-06-23 |
| FI20022150A0 (en) | 2002-12-05 |
| JP2006509103A (en) | 2006-03-16 |
| AR042301A1 (en) | 2005-06-15 |
| EP1579017A1 (en) | 2005-09-28 |
| CN1720342A (en) | 2006-01-11 |
| MXPA05005997A (en) | 2005-08-18 |
| FI20022150A (en) | 2004-06-06 |
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| BR0317061A (en) | 2005-10-25 |
| WO2004050925A1 (en) | 2004-06-17 |
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| PL376932A1 (en) | 2006-01-09 |
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