JP6157870B2 - How to get copper concentrate - Google Patents
How to get copper concentrate Download PDFInfo
- Publication number
- JP6157870B2 JP6157870B2 JP2013027205A JP2013027205A JP6157870B2 JP 6157870 B2 JP6157870 B2 JP 6157870B2 JP 2013027205 A JP2013027205 A JP 2013027205A JP 2013027205 A JP2013027205 A JP 2013027205A JP 6157870 B2 JP6157870 B2 JP 6157870B2
- Authority
- JP
- Japan
- Prior art keywords
- copper
- concentrate
- ore
- content
- grade
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000010949 copper Substances 0.000 title claims description 97
- 229910052802 copper Inorganic materials 0.000 title claims description 95
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims description 93
- 239000012141 concentrate Substances 0.000 title claims description 54
- 238000000034 method Methods 0.000 claims description 27
- 238000005188 flotation Methods 0.000 claims description 21
- 239000002245 particle Substances 0.000 claims description 17
- 229910052951 chalcopyrite Inorganic materials 0.000 claims description 16
- DVRDHUBQLOKMHZ-UHFFFAOYSA-N chalcopyrite Chemical compound [S-2].[S-2].[Fe+2].[Cu+2] DVRDHUBQLOKMHZ-UHFFFAOYSA-N 0.000 claims description 16
- 238000010438 heat treatment Methods 0.000 claims description 16
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 14
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical compound [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 claims description 9
- 239000011028 pyrite Substances 0.000 claims description 9
- 229910052683 pyrite Inorganic materials 0.000 claims description 9
- 229910052947 chalcocite Inorganic materials 0.000 claims description 4
- 229910052955 covellite Inorganic materials 0.000 claims 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 56
- 229910052742 iron Inorganic materials 0.000 description 29
- 241000628997 Flos Species 0.000 description 10
- UOJYYXATTMQQNA-UHFFFAOYSA-N Proxan Chemical compound CC(C)OC(S)=S UOJYYXATTMQQNA-UHFFFAOYSA-N 0.000 description 9
- WVYWICLMDOOCFB-UHFFFAOYSA-N 4-methyl-2-pentanol Chemical compound CC(C)CC(C)O WVYWICLMDOOCFB-UHFFFAOYSA-N 0.000 description 8
- 235000000177 Indigofera tinctoria Nutrition 0.000 description 8
- 229940097275 indigo Drugs 0.000 description 8
- COHYTHOBJLSHDF-UHFFFAOYSA-N indigo powder Natural products N1C2=CC=CC=C2C(=O)C1=C1C(=O)C2=CC=CC=C2N1 COHYTHOBJLSHDF-UHFFFAOYSA-N 0.000 description 8
- 239000002002 slurry Substances 0.000 description 8
- 239000011593 sulfur Substances 0.000 description 8
- 229910052717 sulfur Inorganic materials 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 7
- 238000011084 recovery Methods 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 6
- 238000003723 Smelting Methods 0.000 description 5
- 238000000921 elemental analysis Methods 0.000 description 5
- 238000005486 sulfidation Methods 0.000 description 5
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 4
- 239000000920 calcium hydroxide Substances 0.000 description 4
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 4
- 235000011116 calcium hydroxide Nutrition 0.000 description 4
- 230000003750 conditioning effect Effects 0.000 description 4
- 239000002893 slag Substances 0.000 description 4
- CDBYLPFSWZWCQE-UHFFFAOYSA-L sodium carbonate Substances [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 4
- 241000894007 species Species 0.000 description 4
- 238000002441 X-ray diffraction Methods 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 238000002354 inductively-coupled plasma atomic emission spectroscopy Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 229910000029 sodium carbonate Inorganic materials 0.000 description 2
- PFUVRDFDKPNGAV-UHFFFAOYSA-N sodium peroxide Chemical compound [Na+].[Na+].[O-][O-] PFUVRDFDKPNGAV-UHFFFAOYSA-N 0.000 description 2
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- NFMAZVUSKIJEIH-UHFFFAOYSA-N bis(sulfanylidene)iron Chemical compound S=[Fe]=S NFMAZVUSKIJEIH-UHFFFAOYSA-N 0.000 description 1
- 150000001879 copper Chemical class 0.000 description 1
- BUGICWZUDIWQRQ-UHFFFAOYSA-N copper iron sulfane Chemical compound S.[Fe].[Cu] BUGICWZUDIWQRQ-UHFFFAOYSA-N 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 150000002505 iron Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
Images
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Description
本発明は銅精鉱を得る方法に関する。 The present invention relates to a method for obtaining copper concentrate.
銅の乾式製錬では銅品位０．３〜３重量％の粗鉱を銅分１５〜５０重量％まで濃縮した銅精鉱を銅原料として使用する。この銅精鉱は、黄銅鉱（ＣｕＦｅＳ２）、輝銅鉱（Ｃｕ２Ｓ）、銅藍（ＣｕＳ）、斑銅鉱（Ｃｕ５ＦｅＳ４）、黄鉄鉱（ＦｅＳ２）等からなる混合物であることが多い。 In the dry smelting of copper, copper concentrate obtained by concentrating a crude ore having a copper grade of 0.3 to 3 wt% to a copper content of 15 to 50 wt% is used as a copper raw material. This copper concentrate is often a mixture of chalcopyrite (CuFeS 2 ), chalcocite (Cu 2 S), copper indigo (CuS), chalcopyrite (Cu 5 FeS 4 ), pyrite (FeS 2 ), and the like. .
黄銅鉱、黄鉄鉱、及び斑銅鉱は、その組成のなかに鉄を含む。銅の乾式製錬法においては、熔錬工程及び錬銅工程でスラグ相にこの鉄を分配させることで銅分と分離する。近年採掘される銅鉱石中に黄銅鉱の占める割合は高くなりつつある。それに伴い、精鉱に含まれる鉄の量は増加しつつある。 Chalcopyrite, pyrite, and chalcopyrite contain iron in their composition. In the dry smelting method of copper, it is separated from the copper content by distributing this iron to the slag phase in the smelting process and the wrought copper process. The proportion of chalcopyrite in copper ore mined in recent years is increasing. Along with this, the amount of iron contained in concentrate is increasing.
精鉱中の鉄含有量が上昇するとこれを除くためのスラグ量が必然的に増加するが、銅製錬から排出されるスラグの商業的価値は高くない。そのためスラグの処理が製錬のコストを増大させることになる。また、精鉱の輸送コストを考慮したとき、不純物含有量がなるべく低い精鉱が有利であることは自明である。したがって、荷積み前に精鉱に含まれる鉄分の除去が望まれる。 Increasing the iron content in the concentrate inevitably increases the amount of slag to remove it, but the commercial value of slag discharged from copper smelting is not high. Therefore, the treatment of slag increases the cost of smelting. Moreover, when considering the transport cost of concentrate, it is obvious that concentrate with as low an impurity content as possible is advantageous. Therefore, it is desired to remove iron contained in the concentrate before loading.
精鉱に含まれる鉱種のうち黄銅鉱に関しては、黄銅鉱精鉱を単体硫黄と混合し３５０〜４５０℃に加熱することで黄鉄鉱と銅藍に変換した後に、この２つの鉱種を分離して銅藍をおもに回収することで精鉱中の鉄含有量を下げる技術が知られる（例えば、特許文献１参照）。 Of the ore species included in the concentrate, the chalcopyrite is separated from the two ore species after the chalcopyrite concentrate is mixed with elemental sulfur and heated to 350-450 ° C to convert it to pyrite and copper indigo. A technique for reducing the iron content in the concentrate by mainly collecting copper indigo is known (for example, see Patent Document 1).
しかしながら、そもそも精鉱の８０％通過粒子径は比較的小さく、特許文献１で示されるような方法で鉱種を硫化変換しても、さらに磨鉱して効率よく鉄分の少ない部分を選別することは非常に困難である。特許文献１で示される硫化変換では精鉱粒子表面に銅が濃縮される傾向があり元の精鉱粒子を砕くこと無しには鉄分の多い部分と分離できないためである。 However, the 80% passing particle size of concentrate is relatively small in the first place, and even if the ore species is sulfide-converted by the method shown in Patent Document 1, it is further refined to efficiently select the portion with less iron content. Is very difficult. This is because the sulfur conversion shown in Patent Document 1 tends to concentrate copper on the concentrate particle surface, and cannot be separated from the iron-rich portion without crushing the original concentrate particle.
硫化変換後に磨鉱することにより銅含有量の高い部分と鉄含有量の高い部分とに分かれるものの、元の精鉱粒子よりさらに細かい粒子となる。この場合、通常の浮遊選鉱法での分離は困難を極める。しかしながら、この黄鉄鉱と銅藍とをそれぞれ分離できなければ、鉄含有量を下げるという目的は達成できない。 Although it is divided into a high copper content portion and a high iron content portion by grinding after sulfidation conversion, it becomes finer than the original concentrate particles. In this case, separation by the usual flotation method is extremely difficult. However, unless this pyrite and copper indigo can be separated from each other, the purpose of reducing the iron content cannot be achieved.
この問題を解決するため鉱種を硫化変換する時に黄鉄鉱や高品位銅精鉱を添加しておく方法も提案されている。しかしながら、既に商品価値の高い高品位銅精鉱を添加することは好ましくなく、この場合においても硫化変換処理後の銅分の高い部分と鉄分の高い部分を分離するのは容易ではない。一般的な手法である磨鉱と浮遊選鉱法とを採用した場合では数％の銅分の逸損が見られ、回収された精鉱中の鉄分は２割程度下がるものの効率的であるとは言えない。 In order to solve this problem, a method in which pyrite or high-grade copper concentrate is added at the time of sulfidation conversion of ore species has also been proposed. However, it is not preferable to add a high-grade copper concentrate that already has a high commercial value. Even in this case, it is not easy to separate the high-copper portion and the high-iron portion after the sulfidation treatment. In the case of adopting the general methods of grinding and flotation, a loss of several percent of copper is observed, and the iron content in the recovered concentrate is about 20% lower, but it is efficient. I can not say.
本発明は上記の課題に鑑み、銅鉱石から銅分を濃縮して精鉱にする際に、銅採取率を維持しつつ鉄含有量の低い銅精鉱を得る方法を提供すること目的とする。 In view of the above problems, the present invention aims to provide a method for obtaining a copper concentrate having a low iron content while maintaining a copper collection rate when concentrating copper from copper ore to concentrate. .
本発明に係る銅精鉱を得る方法は、黄銅鉱を含む銅鉱石を破砕、選別することで、銅品位が３重量％〜１０重量％かつ８０％通過粒子径が７０μｍ〜２００μｍとなるまで濃縮する第１濃縮工程と、前記第１濃縮工程によって得られた銅鉱石を単体硫黄と混合して３５０℃〜４５０℃に加熱する加熱工程と、前記加熱工程で得られた銅鉱石を破砕、選別することによって銅分をさらに濃縮する第２濃縮工程と、を含むものである。本発明に係る銅精鉱を得る方法によれば、銅鉱石から銅分を濃縮して精鉱にする際に、銅採取率を維持しつつ鉄含有量の低い銅精鉱を得ることができる。 The method for obtaining the copper concentrate according to the present invention is to concentrate the copper ore containing chalcopyrite by crushing and sorting, until the copper grade is 3 wt% to 10 wt% and the 80% passing particle size is 70 µm to 200 µm. A first concentration step, a heating step in which the copper ore obtained in the first concentration step is mixed with elemental sulfur and heated to 350 ° C. to 450 ° C., and the copper ore obtained in the heating step is crushed and sorted And a second concentration step of further concentrating the copper content. According to the method for obtaining a copper concentrate according to the present invention, a copper concentrate having a low iron content can be obtained while maintaining a copper collection rate when concentrating copper from copper ore to make a concentrate. .
前記第２濃縮工程は、前記加熱工程で得られた銅鉱石を１０〜７０μｍの８０％通過粒子径まで破砕し、浮遊選鉱法により銅分を濃縮する工程としてもよい。前記加熱工程において、前記単体硫黄を、銅鉱石の銅含有量に対して重量比で０．５〜１倍添加してもよい。前記第１濃縮工程に供される前記銅鉱石は、黄鉄鉱、輝銅鉱、及び銅藍のうち少なくとも１種を含んでいてもよい。 The second concentration step may be a step of crushing the copper ore obtained in the heating step to an 80% passing particle diameter of 10 to 70 μm and concentrating the copper content by a flotation method. In the heating step, the elemental sulfur may be added 0.5 to 1 times by weight with respect to the copper content of the copper ore. The copper ore used for the first concentration step may include at least one of pyrite, chalcocite, and copper indigo.
本発明によれば、銅鉱石から銅分を濃縮して精鉱にする際に、銅採取率を維持しつつ鉄含有量の低い銅精鉱を得ることができる。 According to the present invention, a copper concentrate having a low iron content can be obtained while maintaining the copper collection rate when concentrating copper from copper ore to concentrate.
以下、本発明を実施するための実施形態について説明する。 Hereinafter, an embodiment for carrying out the present invention will be described.
（実施形態）
本実施形態は、黄銅鉱を含む銅鉱石を破砕、選別して銅品位を３重量％〜１０重量％まで濃縮する第１濃縮工程と、前記第１濃縮工程によって得られた銅鉱石を単体硫黄と混合して３５０℃〜４５０℃に加熱する加熱工程と、前記加熱工程で得られた銅鉱石を破砕、選別することによって銅分をさらに濃縮する第２濃縮工程と、を含む方法を開示する。図１にフロー図を示す。本実施形態に係る方法が対象とする銅鉱石は、黄銅鉱を含み、さらに、輝銅鉱、銅藍、斑銅鉱、黄鉄鉱などを含んでいてもよい。
(Embodiment)
In this embodiment, the copper ore containing chalcopyrite is crushed and sorted to concentrate the copper grade to 3 wt% to 10 wt%, and the copper ore obtained by the first concentration step is converted to single sulfur. And a second concentration step in which the copper content is further concentrated by crushing and sorting the copper ore obtained in the heating step. . FIG. 1 shows a flowchart. The copper ore targeted by the method according to the present embodiment includes chalcopyrite, and may further include chalcocite, copper indigo, chalcopyrite, pyrite, and the like.
本実施形態によれば、上記銅鉱石を破砕、選別して銅品位を３重量％〜１０重量％まで濃縮することによって、比較的大きい粒子径の粗選鉱が得られる。この粗選鉱に対して上記加熱工程による硫化変換処理を施すことによって、黄銅鉱を銅藍と黄鉄鉱とに変換することができる。上記粗選鉱が比較的大きい粒子径を有することから、硫化変換処理後の粗精鉱に対して破砕、選別する際に、銅含有量の多い部分および鉄含有量の多い部分も比較的大きい粒子径を有する。この場合、当該銅含有量の多い部分と鉄含有量の多い部分との分離性が向上する。その結果、銅採取率を維持しつつ鉄含有量の低い銅精鉱を得ることができる。 According to the present embodiment, a coarse ore with a relatively large particle size can be obtained by crushing and selecting the copper ore and concentrating the copper grade to 3 wt% to 10 wt%. By applying the sulfide conversion treatment by the heating process to the coarse beneficiation, the chalcopyrite can be converted into copper indigo and pyrite. Since the coarse beneficiation has a relatively large particle size, when crushing and sorting the rough concentrate after the sulfidation conversion treatment, the part having a large copper content and the part having a large iron content are also relatively large. Have a diameter. In this case, the separability between the portion having a high copper content and the portion having a high iron content is improved. As a result, it is possible to obtain a copper concentrate having a low iron content while maintaining the copper collection rate.
上記第１濃縮工程で得られる破砕・選別後の粗選鉱の８０％通過粒子径は、７０〜２００μｍであることが好ましい。選別には、篩別、風力選別、テーブル選別、浮遊選鉱等を採用してもよい。 It is preferable that the 80% passage particle diameter of the coarse ore after crushing and sorting obtained in the first concentration step is 70 to 200 μm. For sorting, screening, wind sorting, table sorting, flotation or the like may be employed.
上記加熱工程において、単体硫黄を、銅鉱石の銅含有量に対して重量比で０．５〜１倍添加することが好ましい。硫化変換時の硫黄の添加量が過剰な場合は再度破砕もしくは磨鉱した際に未反応の硫黄が粉塵爆発を起こす可能性があり、添加量が不足する場合は黄銅鉱の変換が不十分となり最終的な鉄含有量が低くならないからである。なお、上記重量比は、粗選鉱中の銅量の１ｍｏｌ〜２ｍｏｌ当量に相当する。また、上記加熱工程では、雰囲気を不活性ガス雰囲気とすることが好ましい。また、温度範囲は４００℃〜４５０℃であることが好ましい。 In the heating step, it is preferable to add elemental sulfur in a weight ratio of 0.5 to 1 times the copper content of the copper ore. If the amount of sulfur added during sulfidation is excessive, unreacted sulfur may cause a dust explosion when it is crushed or ground again. If the amount added is insufficient, the conversion of chalcopyrite will be insufficient. This is because the final iron content does not decrease. In addition, the said weight ratio is corresponded to 1 mol-2 mol equivalent of the amount of copper in roughing. In the heating step, the atmosphere is preferably an inert gas atmosphere. The temperature range is preferably 400 ° C to 450 ° C.
第２濃縮工程においては、磨鉱などの破砕後の粗精鉱の８０％通過粒子径は１０〜７０μｍであることが好ましい。通常の浮遊選鉱法での分離が容易となるからである。第２濃縮工程における選別には、浮遊選鉱法などを採用することができる。この浮遊選鉱法には、通常の銅鉱山で採用されている工程などを適用することができる。浮遊選鉱法では、鉄分は尾鉱に分離除去される。 In the second concentration step, the 80% passing particle diameter of the coarse concentrate after crushing such as grinding ore is preferably 10 to 70 μm. This is because separation by the usual flotation method becomes easy. For the selection in the second concentration step, a flotation method or the like can be employed. For this flotation method, a process employed in a normal copper mine can be applied. In the flotation process, iron is separated and removed by tailings.
以下、実施例により本発明をさらに具体的に説明する。本発明はこれら実施例に限定されるものではない。 Hereinafter, the present invention will be described more specifically with reference to examples. The present invention is not limited to these examples.
（実施例）
黄銅鉱を含む粗選鉱（銅品位５．８重量％、鉄品位８．９重量％、硫黄品位１１重量％、８０％通過粒子径１００μｍ）と単体硫黄とを粗選鉱銅量の１倍重量添加し、Ｎ２ガス雰囲気中において３５０℃で６０分間加熱工程を施した。加熱工程後の粗精鉱（銅品位５．６重量％、鉄品位８．７重量％、硫黄品位１３重量％、８０％通過粒子径１０６μｍ）は、図２，３のＸＲＤによる分析結果のように、黄銅鉱が銅藍と黄鉄鉱とに鉱物変換していることがわかる。
(Example)
Coarse beneficiation including chalcopyrite (copper grade 5.8 wt%, iron grade 8.9 wt%, sulfur grade 11 wt%, 80% passing
次に、加熱工程で得られた粗精鉱に対して湿式ボールミルで摩鉱することによって８０％通過粒子径を４７μｍとした後に、浮選選鉱処理を実施した。浮選機としてファーレンワルド浮選機を用いた。また、浮選試薬としてイソプロピルザンセート（ＩＰＸ）、メチルイソブチルカルビノール（ＭＩＢＣ）、及び消石灰を用いた。 Next, the coarse concentrate obtained in the heating step was ground with a wet ball mill to make the 80% passing particle diameter 47 μm, and then the flotation process was carried out. A Fahrenwald flotation machine was used as the flotation machine. Further, isopropyl xanthate (IPX), methyl isobutyl carbinol (MIBC), and slaked lime were used as flotation reagents.
上記浮遊選鉱処理の手順を以下に記す。消石灰を用いて、摩鉱したスラリーのＰＨを１１に調整し、ＩＰＸを粗精鉱に対し５０ｇ／ｔ添加後、３ｍｉｎコンディショニングを行った。コンディショニング後、ＭＩＢＣを４２ｇ／ｔ添加し、スラリー内にエアを導入した。スラリー上部にフロス層が形成され、これを回収した。フロスは回収時間ごとに分割して２ｍｉｎ間回収した。回収後、ＭＩＢＣを２１ｇ／ｔ再添加し、３ｍｉｎ間フロスを回収した。回収後、ＩＰＸを１０ｇ／ｔ再添加し、５ｍｉｎ間フロスを回収した。回収後、ＩＰＸを１０ｇ／ｔ再添加し、３ｍｉｎ間フロスを回収した。回収したフロス、浮選セル内に残ったスラリーを濾過・乾燥し、秤量及び元素分析を行った。元素分析では、過酸化ナトリウムと炭酸ナトリウムと共に溶融処理した後に溶出し、適当に希釈してＩＣＰ−ＡＥＳ（セイコーインストゥルメンタル社製ＨＶＲ１７００）により濃度を測定して含有量を決定した。 The procedure of the above flotation process is described below. Using slaked lime, the pH of the milled slurry was adjusted to 11, and 50 g / t of IPX was added to the crude concentrate, followed by conditioning for 3 min. After conditioning, 42 g / t of MIBC was added and air was introduced into the slurry. A froth layer was formed on the top of the slurry, and this was recovered. Floss was divided for every collection time and collected for 2 minutes. After the recovery, 21 g / t of MIBC was added again, and the floss was recovered for 3 minutes. After recovery, 10 g / t of IPX was added again, and floss was recovered for 5 minutes. After recovery, 10 g / t of IPX was added again, and the floss was recovered for 3 minutes. The recovered floss and the slurry remaining in the flotation cell were filtered and dried, and weighed and subjected to elemental analysis. In elemental analysis, it was eluted after being melted together with sodium peroxide and sodium carbonate, diluted appropriately, and the concentration was measured with ICP-AES (Seiko Instrumental HVR1700) to determine the content.
（比較例）
比較例では、黄銅鉱を含む粗選鉱（銅品位６．２重量％、鉄品位９．４重量％、硫黄品位１１．１重量％、８０％通過粒子径１００μｍ）を湿式ボールミルで摩鉱し８０％通過粒子径を４１μｍとした後に、浮選選鉱処理を実施した。浮選機としてファーレンワルド浮選機を用いた。また、浮選試薬としてイソプロピルザンセート（ＩＰＸ）、メチルイソブチルカルビノール（ＭＩＢＣ）、及び消石灰を用いた。
(Comparative example)
In the comparative example, a coarse beneficiation containing chalcopyrite (copper grade 6.2% by weight, iron grade 9.4% by weight, sulfur grade 11.1% by weight, 80% passing
上記浮遊選鉱処理の手順を以下に記す。消石灰を用いて、摩鉱したスラリーのＰＨを１１に調整し、ＩＰＸを粗精鉱に対し１０ｇ／ｔ添加後、３ｍｉｎコンディショニングを行った。コンディショニング後、ＭＩＢＣを２０ｇ／ｔ添加し、スラリー内にエアを導入した。スラリー上部にフロス層が形成され、これを回収した。フロスは回収時間ごとに分割して５ｉｎ間回収した。回収後、ＭＩＢＣを２０ｇ／ｔ再添加し、５ｍｉｎ間フロスを回収した。回収後、ＩＰＸを１０ｇ／ｔ再添加し、３ｍｉｎ間フロスを回収した。回収したフロス、浮選セル内に残ったスラリーを濾過・乾燥し、秤量及び元素分析を行った。元素分析では、過酸化ナトリウムと炭酸ナトリウムと共に溶融処理した後に溶出し、適当に希釈してＩＣＰ−ＡＥＳ（セイコーインストゥルメンタル社製ＨＶＲ１７００）により濃度を測定して含有量を決定した。 The procedure of the above flotation process is described below. The pH of the milled slurry was adjusted to 11 using slaked lime, and 10 g / t of IPX was added to the crude concentrate, followed by conditioning for 3 min. After conditioning, 20 g / t of MIBC was added and air was introduced into the slurry. A froth layer was formed on the top of the slurry, and this was recovered. Floss was divided for every collection time and collected for 5 inches. After collection, MIBC was added again at 20 g / t, and floss was collected for 5 minutes. After recovery, 10 g / t of IPX was added again, and the floss was recovered for 3 minutes. The recovered floss and the slurry remaining in the flotation cell were filtered and dried, and weighed and subjected to elemental analysis. In elemental analysis, it was eluted after being melted together with sodium peroxide and sodium carbonate, diluted appropriately, and the concentration was measured with ICP-AES (Seiko Instrumental HVR1700) to determine the content.
図４は、実施例及び比較例で回収したフロスの重量、元素分析から算出した最終精鉱の銅分配率及び鉄分配率を示す。表１は、実施例における粗精鉱品位、変換後品位、最終精鉱の銅分配率が８０％程度の最終精鉱、最終尾鉱の品位、分配率を示す。表２は、比較例における粗選鉱品位、最終精鉱の銅分配率80%程度の最終精鉱、最終尾鉱の品位、分配率を示す。
図４に示すように、実施例及び比較例の最終精鉱の銅分配率が同程度の場合、最終精鉱の鉄分配率は比較例に比べ実施例が低く、同程度の銅分を回収した時に鉄の混入が少ないことが判る。また、表１と表２とを比較すると、最終精鉱の銅分配率は同程度であるものの、鉄回収率は実施例において３０％程度低い。このことから実施例では、銅の分配率を維持したまま、精鉱中の鉄含有量を低く抑えることが出来ることが明らかである。 As shown in FIG. 4, when the copper distribution rate of the final concentrate of the example and the comparative example is similar, the iron distribution rate of the final concentrate is lower in the example than in the comparative example, and the same level of copper content is recovered. When it is done, it turns out that there is little mixing of iron. Moreover, when Table 1 and Table 2 are compared, although the copper distribution rate of the final concentrate is about the same, the iron recovery rate is about 30% lower in the examples. From this, it is clear that in the examples, the iron content in the concentrate can be kept low while maintaining the copper distribution rate.
以上、本発明の実施例について詳述したが、本発明は係る特定の実施例に限定されるものではなく、特許請求の範囲に記載された本発明の要旨の範囲内において、種々の変形・変更が可能である。 Although the embodiments of the present invention have been described in detail above, the present invention is not limited to such specific embodiments, and various modifications and changes can be made within the scope of the gist of the present invention described in the claims. It can be changed.
Claims (4)
前記第１濃縮工程によって得られた銅鉱石を単体硫黄と混合して３５０℃〜４５０℃に加熱する加熱工程と、
前記加熱工程で得られた銅鉱石を破砕、選別することによって銅分をさらに濃縮する第２濃縮工程と、を含むことを特徴とする銅精鉱を得る方法。 A first concentration step of concentrating the copper ore containing chalcopyrite until the copper grade is 3 wt% to 10 wt% and the 80% passing particle diameter is 70 µm to 200 µm by crushing and sorting the copper ore;
A heating step of mixing the copper ore obtained by the first concentration step with elemental sulfur and heating to 350 ° C. to 450 ° C .;
A second concentrating step of further concentrating the copper content by crushing and selecting the copper ore obtained in the heating step, and obtaining a copper concentrate.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013027205A JP6157870B2 (en) | 2013-02-15 | 2013-02-15 | How to get copper concentrate |
| CL2014000351A CL2014000351A1 (en) | 2013-02-15 | 2014-02-12 | Method for obtaining copper concentrate comprising concentrating a copper ore grade of copper ore that includes chalcopyrite 3-10% by weight by grinding and selection, heating to mix the copper ore and a simple sulfur between 350-450 ° C, and concentrate a copper content by crushing and selecting. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013027205A JP6157870B2 (en) | 2013-02-15 | 2013-02-15 | How to get copper concentrate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2014156624A JP2014156624A (en) | 2014-08-28 |
| JP6157870B2 true JP6157870B2 (en) | 2017-07-05 |
Family
ID=51577686
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2013027205A Active JP6157870B2 (en) | 2013-02-15 | 2013-02-15 | How to get copper concentrate |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP6157870B2 (en) |
| CL (1) | CL2014000351A1 (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2469359A1 (en) * | 2001-12-12 | 2003-06-19 | Vladimir Rajic | Selective flotation agent and flotation method |
| US20100024601A1 (en) * | 2006-12-18 | 2010-02-04 | Alexander Beckmann | Method for obtaining copper and precious metals from copper-iron sulphide ores or ore concentrates |
| JP5385235B2 (en) * | 2010-09-07 | 2014-01-08 | Ｊｘ日鉱日石金属株式会社 | Copper concentrate processing method |
| JP5641952B2 (en) * | 2011-01-20 | 2014-12-17 | Jx日鉱日石金属株式会社 | Copper concentrate processing method |
| JP2012201920A (en) * | 2011-03-24 | 2012-10-22 | Jx Nippon Mining & Metals Corp | Method for treating copper concentrate |
| JP2013209719A (en) * | 2012-03-30 | 2013-10-10 | Jx Nippon Mining & Metals Corp | Method for treating copper concentrate |
-
2013
- 2013-02-15 JP JP2013027205A patent/JP6157870B2/en active Active
-
2014
- 2014-02-12 CL CL2014000351A patent/CL2014000351A1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| JP2014156624A (en) | 2014-08-28 |
| CL2014000351A1 (en) | 2014-07-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU2013334500C1 (en) | Iron ore concentration process with grinding circuit, dry desliming and dry or mixed (dry and wet) concentration | |
| Haga et al. | Investigation of flotation parameters for copper recovery from enargite and chalcopyrite mixed ore | |
| JP2013209719A (en) | Method for treating copper concentrate | |
| JP4572703B2 (en) | Separation of arsenic minerals from copper concentrate | |
| AU650355B2 (en) | Processing complex mineral ores | |
| CN104888940B (en) | A kind of method for handling low-grade Cu-Pb zinc-iron multi-metal sulfide extraction valuable metal | |
| AU2008201799B2 (en) | Differential flotation of mixed copper sulphide minerals | |
| JP5502006B2 (en) | Copper concentrate processing method | |
| CN110328044A (en) | A kind of method of blast furnace dust resource utilization | |
| JP5385235B2 (en) | Copper concentrate processing method | |
| JP2015183217A (en) | separation method | |
| JP2012201920A (en) | Method for treating copper concentrate | |
| CN107115961B (en) | Gravity separation method for low-grade and fine-grain embedded minerals | |
| JP5641952B2 (en) | Copper concentrate processing method | |
| JP5497723B2 (en) | Copper concentrate processing method | |
| JP2013155426A (en) | Method for treating copper concentrate | |
| JP6157870B2 (en) | How to get copper concentrate | |
| JP7273254B2 (en) | Metal recovery from metal-bearing materials | |
| JP2012201922A (en) | Method for treating copper concentrate | |
| CN102327801B (en) | Selective milling method for low-grade lead zinc ores | |
| JP2013209718A (en) | Method for treating copper concentrate | |
| JP5991232B2 (en) | How to recover molybdenite | |
| CA2442523C (en) | Method for recovering components from a feed slurry | |
| CN103350032A (en) | Strontium ore beneficiation method | |
| CN107876214A (en) | Copper-containing magnetite ore sorting method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20150928 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20160909 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20161101 |
|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20161227 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20170606 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20170607 |
|
| R150 | Certificate of patent or registration of utility model |
Ref document number: 6157870 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| S531 | Written request for registration of change of domicile |
Free format text: JAPANESE INTERMEDIATE CODE: R313531 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |