JP6401081B2 - Beneficiation method - Google Patents
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- JP6401081B2 JP6401081B2 JP2015044272A JP2015044272A JP6401081B2 JP 6401081 B2 JP6401081 B2 JP 6401081B2 JP 2015044272 A JP2015044272 A JP 2015044272A JP 2015044272 A JP2015044272 A JP 2015044272A JP 6401081 B2 JP6401081 B2 JP 6401081B2
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- 238000000034 method Methods 0.000 title claims description 98
- 230000005415 magnetization Effects 0.000 claims description 122
- DVRDHUBQLOKMHZ-UHFFFAOYSA-N chalcopyrite Chemical compound [S-2].[S-2].[Fe+2].[Cu+2] DVRDHUBQLOKMHZ-UHFFFAOYSA-N 0.000 claims description 82
- 229910052951 chalcopyrite Inorganic materials 0.000 claims description 82
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical compound [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 claims description 63
- 229910052683 pyrite Inorganic materials 0.000 claims description 60
- 239000011028 pyrite Substances 0.000 claims description 60
- 239000002994 raw material Substances 0.000 claims description 56
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 52
- 239000011707 mineral Substances 0.000 claims description 52
- AQLMHYSWFMLWBS-UHFFFAOYSA-N arsenite(1-) Chemical compound O[As](O)[O-] AQLMHYSWFMLWBS-UHFFFAOYSA-N 0.000 claims description 49
- 238000007885 magnetic separation Methods 0.000 claims description 44
- 239000010949 copper Substances 0.000 claims description 42
- 229910052802 copper Inorganic materials 0.000 claims description 41
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 40
- 230000004907 flux Effects 0.000 claims description 27
- 229910052785 arsenic Inorganic materials 0.000 claims description 26
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 claims description 25
- 239000000463 material Substances 0.000 claims description 23
- 229910052964 arsenopyrite Inorganic materials 0.000 claims description 4
- MJLGNAGLHAQFHV-UHFFFAOYSA-N arsenopyrite Chemical compound [S-2].[Fe+3].[As-] MJLGNAGLHAQFHV-UHFFFAOYSA-N 0.000 claims description 3
- RKTYLMNFRDHKIL-UHFFFAOYSA-N copper;5,10,15,20-tetraphenylporphyrin-22,24-diide Chemical compound [Cu+2].C1=CC(C(=C2C=CC([N-]2)=C(C=2C=CC=CC=2)C=2C=CC(N=2)=C(C=2C=CC=CC=2)C2=CC=C3[N-]2)C=2C=CC=CC=2)=NC1=C3C1=CC=CC=C1 RKTYLMNFRDHKIL-UHFFFAOYSA-N 0.000 claims description 2
- 238000011084 recovery Methods 0.000 description 67
- 239000002245 particle Substances 0.000 description 35
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 description 24
- 239000012141 concentrate Substances 0.000 description 22
- 229910052961 molybdenite Inorganic materials 0.000 description 19
- 238000005188 flotation Methods 0.000 description 17
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 11
- 239000011733 molybdenum Substances 0.000 description 10
- 229910052750 molybdenum Inorganic materials 0.000 description 10
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 9
- 239000006148 magnetic separator Substances 0.000 description 9
- 239000002002 slurry Substances 0.000 description 9
- 229910052969 tetrahedrite Inorganic materials 0.000 description 9
- 238000000926 separation method Methods 0.000 description 8
- 238000002360 preparation method Methods 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- 238000003672 processing method Methods 0.000 description 5
- 238000003723 Smelting Methods 0.000 description 4
- 238000005868 electrolysis reaction Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 229910052971 enargite Inorganic materials 0.000 description 3
- 239000007800 oxidant agent Substances 0.000 description 3
- 238000009832 plasma treatment Methods 0.000 description 3
- QIJNJJZPYXGIQM-UHFFFAOYSA-N 1lambda4,2lambda4-dimolybdacyclopropa-1,2,3-triene Chemical compound [Mo]=C=[Mo] QIJNJJZPYXGIQM-UHFFFAOYSA-N 0.000 description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 229910052947 chalcocite Inorganic materials 0.000 description 2
- 229910001779 copper mineral Inorganic materials 0.000 description 2
- OMZSGWSJDCOLKM-UHFFFAOYSA-N copper(II) sulfide Chemical compound [S-2].[Cu+2] OMZSGWSJDCOLKM-UHFFFAOYSA-N 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 239000003112 inhibitor Substances 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 229910052982 molybdenum disulfide Inorganic materials 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 238000007873 sieving Methods 0.000 description 2
- VILCJCGEZXAXTO-UHFFFAOYSA-N 2,2,2-tetramine Chemical compound NCCNCCNCCN VILCJCGEZXAXTO-UHFFFAOYSA-N 0.000 description 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 239000004484 Briquette Substances 0.000 description 1
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 description 1
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- -1 alkali metal salt Chemical class 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000002738 chelating agent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910001431 copper ion Inorganic materials 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- ZOOODBUHSVUZEM-UHFFFAOYSA-N ethoxymethanedithioic acid Chemical compound CCOC(S)=S ZOOODBUHSVUZEM-UHFFFAOYSA-N 0.000 description 1
- 239000008396 flotation agent Substances 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 150000002751 molybdenum Chemical class 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 238000005504 petroleum refining Methods 0.000 description 1
- 229920000768 polyamine Polymers 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229910052569 sulfide mineral Inorganic materials 0.000 description 1
- 150000003464 sulfur compounds Chemical class 0.000 description 1
- 229910052970 tennantite Inorganic materials 0.000 description 1
- 239000012991 xanthate Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
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- Manufacture And Refinement Of Metals (AREA)
Description
本発明は、選鉱方法に関する。さらに詳しくは、磁力選鉱による選鉱方法に関する。 The present invention relates to a beneficiation method. More specifically, the present invention relates to a beneficiation method using magnetic beneficiation.
銅精錬の分野では、銅を含有する銅鉱石や銅精鉱などの原料から銅を回収する様々な方法が提案されている。例えば、銅鉱石から銅を回収するには以下の処理が行われる。 In the field of copper refining, various methods for recovering copper from raw materials such as copper ore containing copper and copper concentrate have been proposed. For example, the following processing is performed to recover copper from copper ore.
（１）選鉱工程
選鉱工程では、鉱山で採掘された銅鉱石を粉砕した後、水を加えてスラリーとし、浮遊選鉱を行う。浮遊選鉱では、スラリーに抑制剤、起泡剤、捕収剤などで構成される浮選剤を添加し、空気を吹き込んで銅を含む鉱物を浮遊させつつ、脈石を沈降させて分離を行う。これにより銅品位30%前後の銅精鉱が得られる。
(1) Mining process In the beneficiation process, after the copper ore mined in the mine is crushed, water is added to form a slurry, which is subjected to flotation. In flotation, a flotation agent composed of an inhibitor, a foaming agent, a collection agent, etc. is added to the slurry, and air is blown to float minerals containing copper, and the gangue is allowed to settle and separate. . As a result, copper concentrate with a copper grade of around 30% is obtained.
（２）乾式製錬工程
乾式製錬工程では、選鉱工程で得られた銅精鉱を自溶炉などの炉を用いて熔解し、転炉および精製炉を経て銅品位99%程度の粗銅にまで精製する。粗銅は次工程の電解工程で用いられるアノードに鋳造される。
(2) Dry smelting process In the dry smelting process, the copper concentrate obtained in the beneficiation process is melted using a furnace such as a flash smelting furnace, and then passed through a converter and a refining furnace to obtain crude copper with a copper grade of about 99%. Until purified. Crude copper is cast into an anode used in the subsequent electrolysis process.
（３）電解工程
電解工程では、硫酸酸性溶液（電解液）で満たされた電解槽に前記アノードを挿入し、カソードとの間に通電して電解精製を行う。電解精製によって、アノードの銅は溶解し、カソード上に純度99.99%の電気銅として析出する。
(3) Electrolysis step In the electrolysis step, the anode is inserted into an electrolytic tank filled with a sulfuric acid acid solution (electrolytic solution), and electrolysis is performed by energizing the cathode. By electrolytic purification, the copper of the anode is dissolved and deposited as 99.99% pure copper on the cathode.
ところで、銅は黄銅鉱や班銅鉱などの硫化鉱物として硫化銅鉱石中に存在するものが多い。ポーフォリー型と呼ばれる銅鉱床をもつ鉱山では、鉱石中の黄銅鉱や斑銅鉱に輝水鉛鉱や硫砒銅鉱が随伴されている。 By the way, many copper exists in a copper sulfide ore as sulfide minerals, such as a chalcopyrite and a briquette ore. In a mine with a copper deposit called porphyry, chalcopyrite and arsenite are accompanied by chalcopyrite and porphyry in the ore.
輝水鉛鉱に含まれるモリブデンは特殊鋼の合金成分、石油精製の触媒、潤滑剤などに用いられる有価な元素である。また、輝水鉛鉱が炉で熔解されると、揮発したモリブデンが設備に付着し腐食を促進する。硫砒銅鉱に含まれる砒素を乾式製錬工程で処理するにはコストが必要となる。そのため、選鉱工程において銅鉱石から輝水鉛鉱や硫砒銅鉱を分離することが求められる。 Molybdenum contained in molybdenite is a valuable element used for alloy components of special steel, catalysts for petroleum refining, lubricants and the like. In addition, when molybdenite is melted in the furnace, volatilized molybdenum adheres to the equipment and promotes corrosion. Cost is required to treat arsenic contained in the arsenous copper ore in the dry smelting process. Therefore, it is required to separate pyroxenite or arsenite from copper ore in the beneficiation process.
以下の特許文献１、２、３には、輝水鉛鉱などのモリブデンを含有する鉱物を分離する方法が開示されている。 The following Patent Documents 1, 2, and 3 disclose a method of separating a mineral containing molybdenum such as molybdenite.
特許文献１には、鉱物の表面をオゾン酸化させた後に浮遊選鉱を行う方法が開示されている。より詳細には、銅粗選および銅精選によって得られた銅精鉱に対してモリブデン浮選を行う。得られた浮鉱の輝水鉛鉱含有量が約1重量%になった時点で浮鉱をオゾン酸化する。この浮鉱を再度浮遊選鉱に付してモリブデン鉱物を浮鉱として回収する。 Patent Document 1 discloses a method of performing flotation after the surface of a mineral is oxidized with ozone. More specifically, molybdenum flotation is performed on the copper concentrate obtained by copper roughing and copper selection. When the content of molybdenite is about 1% by weight, the float is ozone-oxidized. This float is again subjected to flotation and the molybdenum mineral is recovered as float.
特許文献２には、鉱物の表面にプラズマ処理を施した後に浮遊選鉱を行う方法が開示されている。より詳細には、銅を含む鉱物とモリブデンを含む鉱物の混合物に、酸素を酸化剤とする雰囲気下でプラズマ照射を行う。プラズマ処理後の混合物をアルカリ金属塩の水溶液で洗浄する。洗浄後の混合物を浮遊選鉱に付して銅を含む鉱物とモリブデンを含む鉱物とを分離する。 Patent Document 2 discloses a method in which flotation is performed after a plasma treatment is performed on the surface of a mineral. More specifically, plasma irradiation is performed on a mixture of a mineral containing copper and a mineral containing molybdenum in an atmosphere containing oxygen as an oxidizing agent. The mixture after the plasma treatment is washed with an aqueous solution of an alkali metal salt. The washed mixture is subjected to flotation to separate copper-containing minerals and molybdenum-containing minerals.
特許文献３には、高純度二硫化モリブデンの製造方法が開示されている。より詳細には、モリブデン精鉱からなる湿潤ケーキにマイクロ波処理を施す。マイクロ波処理の後、湿潤ケーキに水を加えてスラリーとし磁力分離を行う。これにより純度が99.3%以上の高純度二硫化モリブデンを得る。 Patent Document 3 discloses a method for producing high-purity molybdenum disulfide. More specifically, the wet cake made of molybdenum concentrate is subjected to microwave treatment. After the microwave treatment, water is added to the wet cake to form a slurry and magnetic separation is performed. As a result, high-purity molybdenum disulfide having a purity of 99.3% or more is obtained.
以下の特許文献４、５、６には、硫砒銅鉱などの砒素を含有する鉱物を分離する方法が開示されている。 Patent Documents 4, 5, and 6 below disclose methods for separating arsenic-containing minerals such as arsenite.
特許文献４には、砒素を含む銅精鉱を90〜120℃で加熱処理した後、リパルプして浮遊選鉱し、砒素鉱物を浮遊させて除去することが開示されている。加熱処理により銅鉱物表面が酸化され、不活性の酸化皮膜が形成される。その結果、銅鉱物と砒素鉱物の表面での表面化学的または結晶化学的な状態に違いが生じ、これが浮遊性の差となって両者の分離が可能になると考えられる。 Patent Document 4 discloses that copper concentrate containing arsenic is heat-treated at 90 to 120 ° C., then repulped and floated to remove the arsenic mineral by floating. The copper mineral surface is oxidized by the heat treatment, and an inactive oxide film is formed. As a result, a difference occurs in the surface chemical or crystal chemical state on the surface of the copper mineral and the arsenic mineral, and this is considered to be a floating difference and to be able to separate them.
特許文献５には、空気、過酸化水素、その他の酸化剤を添加し、ザンセートを捕収剤とし、ポリアミンおよび硫黄化合物の混合物を抑制剤としてｐＨ９〜１０で浮遊選鉱することによって砒素鉱物を分離する方法が開示されている。 In Patent Document 5, arsenic minerals are separated by flotation at pH 9 to 10 using air, hydrogen peroxide, and other oxidizing agents, xanthate as a collector, and a mixture of polyamine and sulfur compounds as inhibitors. A method is disclosed.
特許文献６には、砒素鉱物を含む含銅物に水を添加してスラリーにした後、スラリーのｐＨを８〜１２に調整して浮遊選鉱することによって含銅物から砒素鉱物を分離する方法が開示されている。銅イオンとのキレートを生成するトリエチレンテトラミンやエチレンジアミン四酢酸などのキレート剤を用いて含銅物を処理する可溶性銅除去工程、および空気や酸素などの酸化剤を用いて砒素鉱物を酸化処理する酸化工程の内の少なくとも一方を行う。 Patent Document 6 discloses a method of separating arsenic mineral from copper-containing material by adding water to the copper-containing material containing arsenic mineral to make a slurry, and then adjusting the pH of the slurry to 8 to 12 and performing flotation. Is disclosed. A soluble copper removal process that treats copper-containing materials using a chelating agent such as triethylenetetramine or ethylenediaminetetraacetic acid that chelates copper ions, and an arsenic mineral that is oxidized using an oxidizing agent such as air or oxygen At least one of the oxidation steps is performed.
本発明は上記事情に鑑み、より効率のよい選鉱方法を提供することを目的とする。 In view of the above circumstances, an object of the present invention is to provide a more efficient beneficiation method.
第１発明の選鉱方法は、粉砕された複数種類の鉱物を含む原料を加熱して一部の鉱物を磁化する磁化工程と、前記磁化工程の後に、前記原料を磁着物と非磁着物に分離する磁力選鉱工程と、を備え、前記原料には黄銅鉱および硫砒銅鉱が含まれており、前記磁化工程において、炉内温度を750℃以上とし、前記磁力選鉱工程において、磁束密度を約1.0Tとし、前記磁力選鉱工程において、前記原料を前記原料よりも黄銅鉱の品位が高い前記磁着物と前記原料よりも硫砒銅鉱の品位が高い前記非磁着物とに分離することを特徴とする。
第２発明の選鉱方法は、粉砕された複数種類の鉱物を含む原料を加熱して一部の鉱物を磁化する磁化工程と、前記磁化工程の後に、前記原料を磁着物と非磁着物に分離する磁力選鉱工程と、を備え、前記原料には黄銅鉱および砒四面銅鉱が含まれており、前記磁化工程において、炉内温度を500℃以上750℃以下とし、前記磁力選鉱工程において、磁束密度を1.0T以上とし、前記磁力選鉱工程において、前記原料を前記原料よりも黄銅鉱の品位が高い前記磁着物と前記原料よりも砒四面銅鉱の品位が高い前記非磁着物とに分離することを特徴とする。
第３発明の選鉱方法は、粉砕された複数種類の鉱物を含む原料を加熱して一部の鉱物を磁化する磁化工程と、前記磁化工程の後に、前記原料を磁着物と非磁着物に分離する磁力選鉱工程と、を備え、前記原料には黄銅鉱および硫砒鉄鉱が含まれており、前記磁化工程において、炉内温度を500℃以上750℃以下とし、前記磁力選鉱工程において、磁束密度を1.0T以上とし、前記磁力選鉱工程において、前記原料を前記原料よりも黄銅鉱の品位が高い前記磁着物と前記原料よりも硫砒鉄鉱の品位が高い前記非磁着物とに分離することを特徴とする。
第４発明の選鉱方法は、粉砕された複数種類の鉱物を含む原料を加熱して一部の鉱物を磁化する磁化工程と、前記磁化工程の後に、前記原料を磁着物と非磁着物に分離する磁力選鉱工程と、を備え、前記原料には黄銅鉱および黄鉄鉱が含まれており、前記磁化工程において、炉内温度を200℃以上250℃以下とし、前記磁力選鉱工程において、磁束密度を2.0T以上とすることを特徴とする。
第５発明の選鉱方法は、粉砕された複数種類の鉱物を含む原料を加熱して一部の鉱物を磁化する磁化工程と、前記磁化工程の後に、前記原料を磁着物と非磁着物に分離する磁力選鉱工程と、を備え、前記原料には黄鉄鉱および硫砒鉄鉱が含まれており、前記磁化工程において、炉内温度を500℃以上750℃以下とし、前記磁力選鉱工程において、磁束密度を1.0T以上とし、前記磁力選鉱工程において、前記原料を前記原料よりも黄鉄鉱の品位が高い前記磁着物と前記原料よりも硫砒鉄鉱の品位が高い前記非磁着物とに分離することを特徴とする。
The mineral processing method according to the first aspect of the present invention includes a magnetization step of magnetizing a part of minerals by heating a raw material containing a plurality of pulverized minerals, and separating the raw material into a magnetized material and a non-magnetized material after the magnetization step. The raw material contains chalcopyrite and arsenite, the furnace temperature is 750 ° C. or higher in the magnetization step, and the magnetic flux density is about 1.0 T in the magnetic beneficiation step. In the magnetic separation process, the raw material is separated into the magnetic deposit having a higher grade of chalcopyrite than the raw material and the non-magnetic deposit having a higher grade of arsenite than the raw material .
A mineral processing method according to a second aspect of the present invention includes a magnetization step of magnetizing a part of minerals by heating a raw material containing a plurality of pulverized minerals, and separating the raw material into a magnetized material and a non-magnetized material after the magnetization step. And the raw material contains chalcopyrite and arsenic tetrahedrite, the furnace temperature is 500 ° C. or higher and 750 ° C. or lower in the magnetization step, and the magnetic flux separation step 1.0T or more, and in the magnetic separation process, the raw material is separated into the magnetic material having a higher grade of chalcopyrite than the raw material and the non-magnetic material having a higher grade of arsenic tetragonal copper than the raw material. It is characterized by.
A mineral processing method according to a third aspect of the present invention includes a magnetization step of magnetizing a part of minerals by heating a raw material containing a plurality of pulverized minerals, and separating the raw material into a magnetized material and a non-magnetized material after the magnetization step. And the raw material contains chalcopyrite and arsenite. In the magnetization step, the furnace temperature is set to 500 ° C. or more and 750 ° C. or less. In the magnetic separation step, the magnetic flux density is 1.0 T or more, and in the magnetic separation process, the raw material is separated into the magnetic deposit having a higher grade of chalcopyrite than the raw material and the non-magnetic deposit having a higher grade of arsenite than the raw material. And
A mineral processing method according to a fourth aspect of the present invention is a method of magnetizing a part of minerals by heating a raw material containing a plurality of pulverized minerals, and separating the raw material into a magnetized material and a non-magnetized material after the magnetizing step. The raw material contains chalcopyrite and pyrite, and in the magnetization step, the furnace temperature is set to 200 ° C. or more and 250 ° C. or less, and in the magnetic separation step, the magnetic flux density is 2.0. It is characterized by being T or more.
A mineral processing method according to a fifth aspect of the present invention is a method of magnetizing a part of minerals by heating a raw material containing a plurality of pulverized minerals, and separating the raw material into a magnetized material and a non-magnetized material after the magnetizing step. The raw material contains pyrite and arsenite, the furnace temperature is 500 ° C. or higher and 750 ° C. or lower in the magnetization step, and the magnetic flux density is 1.0 in the magnetic separation step. T or more, and in the magnetic beneficiation step, the raw material is separated into the magnetic deposit having a higher grade of pyrite than the raw material and the non-magnetic deposit having a higher grade of pyrite than the raw material. .
第１発明によれば、黄銅鉱の磁着物回収率を90%以上とし、かつ硫砒銅鉱の磁着物回収率をほぼ0とでき、黄銅鉱と硫砒銅鉱を十分に分離できる。
第２発明によれば、黄銅鉱の磁着物回収率を90%以上とし、かつ砒四面銅鉱の磁着物回収率をほぼ0とでき、黄銅鉱と砒四面銅鉱を十分に分離できる。
第３発明によれば、黄銅鉱の磁着物回収率を90%以上とし、かつ硫砒鉄鉱の磁着物回収率をほぼ0とでき、黄銅鉱と硫砒鉄鉱を十分に分離できる。
第４発明によれば、黄銅鉱の磁着物回収率を50%以上とし、かつ黄鉄鉱の磁着物回収率をほぼ0とでき、黄銅鉱と黄鉄鉱を十分に分離できる。
第５発明によれば、黄鉄鉱の磁着物回収率を80%以上とし、かつ硫砒鉄鉱の磁着物回収率をほぼ0とでき、黄鉄鉱と硫砒鉄鉱を十分に分離できる。
According to the first aspect of the invention, the recovery rate of the magnetic deposits of chalcopyrite can be 90% or more, and the recovery rate of the magnetic deposits of the arsenite can be almost 0, so that the chalcopyrite and the arsenite can be sufficiently separated.
According to the second invention, the recovery rate of the magnetic deposits of chalcopyrite can be 90% or more, and the recovery rate of the magnetic deposits of arsenic tetrahedral copper can be almost 0, so that the chalcopyrite and the arsenic tetrahedral copper can be sufficiently separated.
According to the third aspect of the invention, the recovery rate of chalcopyrite magnetic deposits can be 90% or more, and the recovery rate of magnetite deposits of arsenite can be almost zero, so that chalcopyrite and arsenite can be sufficiently separated.
According to the fourth aspect of the invention, the recovery rate of pyrite magnetic deposits can be set to 50% or more, and the recovery rate of pyrite magnetic deposits can be substantially zero, so that pyrite and pyrite can be sufficiently separated.
According to the fifth aspect of the invention, the recovery rate of pyrite magnetic deposits can be set to 80 % or more, and the recovery rate of magnetite deposits of pyrite can be almost zero, so that pyrite and arsenite can be sufficiently separated.
つぎに、本発明の実施形態を図面に基づき説明する。
図１に示すように、本発明の一実施形態に係る選鉱方法は、（１）粉砕工程、（２）浮遊選鉱工程、（３）磁化工程、（４）磁力選鉱工程からなる。
Next, an embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the beneficiation method according to an embodiment of the present invention includes (1) a pulverization step, (2) a flotation step, (3) a magnetization step, and (4) a magnetic beneficiation step.
（１）粉砕工程
粉砕工程では、鉱山で採掘された鉱石を粉砕する。
(1) Grinding step In the grinding step, the ore mined in the mine is crushed.
（２）浮遊選鉱工程
浮遊選鉱工程では、粉砕された鉱石に水を加えてスラリーとし、浮遊選鉱を行う。浮遊選鉱により、鉱石に含まれる脈石を除去し、精鉱を得る。必要に応じてさらに種々の方法で選鉱を行ってもよい。また、浮遊選鉱に代えて、他の選鉱方法で脈石を除去し、精鉱を得てもよい。なお、次工程の磁化工程に装入される精鉱が、特許請求の範囲に記載の「原料」に相当する。
(2) Flotation process In the flotation process, water is added to the crushed ore to form a slurry, which is then subjected to flotation. By flotation, gangue contained in the ore is removed and concentrate is obtained. Further, the beneficiation may be performed by various methods as necessary. Further, instead of the flotation, the gangue may be removed by other beneficiation methods to obtain concentrate. The concentrate charged in the next magnetization step corresponds to the “raw material” described in the claims.
精鉱には複数種類の鉱物が含まれる。鉱物としては、例えば、黄銅鉱（chalcopyrite：CuFeS2）、黄鉄鉱（pyrite：FeS2）、輝水鉛鉱（molybdenite：MoS2）、硫砒銅鉱（enargite：Cu3AsS4）、硫砒鉄鉱（arsenopyrite：FeAsS）、砒四面銅鉱（tennantite：(Cu,Fe,Zn)12(Sb,As)4S13）が挙げられる。 The concentrate contains multiple types of minerals. Examples of minerals include pyrite (chalcopyrite: CuFeS 2 ), pyrite (pyrite: FeS 2 ), molybdenite (molybdenite: MoS 2 ), pyrite (enargite: Cu 3 AsS 4 ), arsenite (arsenopyrite: FeAsS) ), Tennantite ((Cu, Fe, Zn) 12 (Sb, As) 4 S 13 ).
例えば、鉱石として輝水鉛鉱を随伴する硫化銅鉱石を用い、鉱石にプラズマ処理を施した後に浮遊選鉱を行うと、下記表１に示す組成のモリブデン精鉱が得られる。このモリブデン精鉱には主に黄銅鉱と輝水鉛鉱が含まれる。
また、近年入手可能となったペルー産銅精鉱の組成を表２に示す。ペルー産銅精鉱には主に黄銅鉱と硫砒銅鉱が含まれる。
（３）磁化工程
磁化工程では、精鉱を加熱して一部の鉱物を磁化する。例えば、黄銅鉱と輝水鉛鉱を含む精鉱を電気炉で加熱して黄銅鉱のみを磁化する。精鉱に含まれる鉱物の種類に応じて、炉内温度や処理時間など磁化工程の条件を設定することで、効率よく選鉱できる。この詳細は下記実施例にて説明する。精鉱を加熱する装置は特に限定されないが、例えば電気炉、バーナー炉、熱風炉などを用いることができる。
(3) Magnetization step In the magnetization step, the concentrate is heated to magnetize some minerals. For example, a concentrate containing chalcopyrite and molybdenite is heated in an electric furnace to magnetize only chalcopyrite. Depending on the type of mineral contained in the concentrate, the conditions of the magnetization process, such as the furnace temperature and processing time, can be set for efficient mineral selection. The details will be described in the following examples. Although the apparatus which heats concentrate is not specifically limited, For example, an electric furnace, a burner furnace, a hot air furnace etc. can be used.
（４）磁力選鉱工程
磁化工程の後、精鉱を磁着物と非磁着物に分離する。磁化工程で磁化した鉱物を磁着物として、磁化しなかった鉱物を非磁着物として回収することで、鉱物を種類ごとに分離することができる。例えば、黄銅鉱を磁着物として、輝水鉛鉱を非磁着物として分離することができる。ここで、精鉱に含まれる鉱物の種類に応じて、磁束密度など磁力選鉱工程の条件を設定することで、効率よく選鉱できる。この詳細は下記実施例にて説明する。
(4) Magnetic beneficiation process After the magnetizing process, the concentrate is separated into a magnetized product and a non-magnetized product. By collecting the mineral magnetized in the magnetization process as a magnetized substance and the non-magnetized mineral as a non-magnetized substance, the mineral can be separated by type. For example, it is possible to separate chalcopyrite as a magnetic deposit, and hydropyrite as a non-magnetic deposit. Here, according to the type of mineral contained in the concentrate, it is possible to efficiently concentrate the mineral by setting the conditions of the magnetic beneficiation process such as the magnetic flux density. The details will be described in the following examples.
磁力選鉱に用いられる装置は特に限定されないが、例えば交流対極磁選機、ドラム型磁選機、ベルト型磁選機などを用いることができる。このうち交流対極磁選機は図２に示す構成を有する。交流対極磁選機１は、水平に対向させて配置された一対の電磁ドラム１１、１１を有する。この一対の電磁ドラム１１、１１の間に磁場を発生させる。原料を電磁ドラム１１、１１の間に流すと、磁着物は電磁ドラム１１に吸着され電磁ドラム１１の回転により運ばれて磁着物排出口１２から排出される。一方、非磁着物は電磁ドラム１１、１１の間をそのまま落下し非磁着物排出口１３から排出される。電磁ドラム１１、１１の間の磁束密度は設定により変更可能である。 The apparatus used for the magnetic separation is not particularly limited. For example, an AC counter magnetic separator, a drum type magnetic separator, a belt type magnetic separator or the like can be used. Among them, the AC counter magnetic separator has the configuration shown in FIG. The AC counter magnetic separator 1 has a pair of electromagnetic drums 11 and 11 arranged to face each other horizontally. A magnetic field is generated between the pair of electromagnetic drums 11 and 11. When the raw material is passed between the electromagnetic drums 11, 11, the magnetic deposit is attracted to the electromagnetic drum 11, is carried by the rotation of the electromagnetic drum 11, and is discharged from the magnetic deposit discharge port 12. On the other hand, the non-magnetized material falls between the electromagnetic drums 11 and 11 and is discharged from the non-magnetized material discharge port 13. The magnetic flux density between the electromagnetic drums 11 and 11 can be changed by setting.
なお、磁化工程および磁力選鉱工程は湿式で行ってもよいし、乾式で行ってもよい。浮遊選鉱で得られた直後の精鉱を原料とする場合には、スラリーのまま湿式で磁化工程および磁力選鉱工程を行えばよい。そうすれば、スラリーを乾燥させる必要がなくなる。また、乾燥した原料を処理する場合には、わざわざスラリーにする必要はなく、乾式で処理すればよい。 In addition, the magnetization process and the magnetic separation process may be performed by a wet method or a dry method. When the concentrate immediately after obtained by flotation is used as a raw material, the magnetization process and the magnetic separation process may be performed wet with the slurry. This eliminates the need to dry the slurry. Moreover, when processing the dried raw material, it is not necessary to bother to make a slurry.
（実施例１）黄銅鉱と輝水鉛鉱の分離
（１）試料調整
純粋な黄銅鉱および輝水鉛鉱の試料を準備し、それぞれに対して粒度調整を行った。粒度調整は試料をメノウ乳鉢で粉砕した後、篩分けすることにより行った。鉱物の酸化を防止するために窒素ガス雰囲気中で処理を行った。粒度調整により、黄銅鉱の粒度を38〜125μm、輝水鉛鉱の粒度を1mm以下とした。
(Example 1) Separation of chalcopyrite and molybdenite (1) Sample preparation Samples of pure chalcopyrite and molybdenite were prepared and the particle size was adjusted for each. The particle size was adjusted by sieving the sample with an agate mortar and then sieving. The treatment was performed in a nitrogen gas atmosphere to prevent mineral oxidation. By adjusting the particle size, the particle size of chalcopyrite was 38 to 125 μm, and the particle size of molybdenite was 1 mm or less.
（２）磁化処理
（１）で調整した黄銅鉱および輝水鉛鉱の試料を複数用意した。各試料の重量は0.5gとした。各試料をるつぼに入れて電気炉で加熱することにより磁化処理を行った。磁化処理の条件は、炉内温度を４パターン（250、500、750、1,000℃）とし、処理時間を60秒とした。電気炉は東京理化器械株式会社製の型番：EXHAUST UNIT EU-100を用いた。
(2) Magnetization treatment A plurality of samples of chalcopyrite and molybdenite prepared in (1) were prepared. The weight of each sample was 0.5 g. Each sample was put in a crucible and heated in an electric furnace to perform magnetization treatment. The conditions for the magnetization treatment were that the furnace temperature was 4 patterns (250, 500, 750, 1,000 ° C.) and the treatment time was 60 seconds. As the electric furnace, model number: EXHAUST UNIT EU-100 manufactured by Tokyo Rika Kikai Co., Ltd. was used.
磁化処理の後、試料を放冷してから各試料の磁化強度を測定した。磁化強度の測定には、Bartington Instruments社製の磁化率測定装置（Magnetic susceptibility meter（型番：M3）およびSingle Frequency Sensor（型番：MS2G））を用いた。 After the magnetization treatment, the sample was allowed to cool and then the magnetization intensity of each sample was measured. For the measurement of the magnetization intensity, a magnetic susceptibility measuring device (Magnetic susceptibility meter (model number: M3) and Single Frequency Sensor (model number: MS2G)) manufactured by Bartington Instruments was used.
各試料の磁化強度を図３に示す。図３に示すグラフの横軸は磁化処理における炉内温度、縦軸は磁化強度である。図３中「Chalcopyrite」は黄銅鉱を意味し、「Molybdenite」は輝水鉛鉱を意味する。図３より、黄銅鉱は炉内温度が高いほど磁化強度が強くなることが分かる。一方、輝水鉛鉱は何れの条件においても磁化強度がほぼ0であることが分かる。 The magnetization intensity of each sample is shown in FIG. The horizontal axis of the graph shown in FIG. 3 is the furnace temperature in the magnetization process, and the vertical axis is the magnetization intensity. In FIG. 3, “Chalcopyrite” means chalcopyrite and “Molybdenite” means molybdenite. It can be seen from FIG. 3 that the strength of magnetization of chalcopyrite increases as the furnace temperature increases. On the other hand, it is understood that the magnetite strength is almost zero under any conditions.
（３）磁力選鉱
（２）で磁化処理した後の試料に対して磁力選鉱を行った。磁力選鉱には日本磁力選鉱株式会社製の交流対極磁選機（型式：G−30+30型）を用いた（図２参照）。電磁ドラムの間の磁束密度を３パターン（0.5、1.0、2.0T）とした。交流対極磁選機により試料を磁着物と非磁着物とに分離し、磁着物回収率を求めた。ここで、磁着物回収率とは、磁力選鉱前の試料の重量に対する磁着物の重量の割合を意味する。
(3) Magnetic separation The magnetic separation was performed on the sample after the magnetization treatment in (2). An AC counter magnetic separator (model: G-30 + 30 type) manufactured by Nippon Magnetic Sorting Co., Ltd. was used for the magnetic separation (see FIG. 2). The magnetic flux density between the electromagnetic drums was 3 patterns (0.5, 1.0, 2.0T). The sample was separated into magnetized material and non-magnetized material by an AC counter magnetic separator, and the magnetized material recovery rate was determined. Here, the magnetic deposit recovery means the ratio of the weight of the magnetic deposit to the weight of the sample before the magnetic separation.
図４に各試料の磁着物回収率を示す。図４に示すグラフの横軸は磁化処理における炉内温度、縦軸は磁着物回収率である。図４中「cpy」は黄銅鉱を意味し、「Molybd」は輝水鉛鉱を意味する。図４より、黄銅鉱は炉内温度が高いほど磁着物回収率が高いことが分かる。また、試料の磁化強度が弱くても磁束密度を大きくすることで磁着物回収率を高くすることができ、逆に試料の磁化強度が強い場合には磁束密度を小さくしても磁着物回収率を高く維持できることが分かる。一方、輝水鉛鉱は何れの条件においても磁着物回収率はほぼ0であることが分かる。 FIG. 4 shows the magnetic deposit recovery rate of each sample. The horizontal axis of the graph shown in FIG. 4 is the furnace temperature in the magnetization process, and the vertical axis is the magnetic deposit recovery rate. In FIG. 4, “cpy” means chalcopyrite and “Molybd” means molybdenite. From FIG. 4, it can be seen that chalcopyrite has a higher recovery rate of magnetic deposits as the furnace temperature increases. Moreover, even if the magnetization strength of the sample is weak, increasing the magnetic flux density can increase the recovery rate of magnetic deposits. Conversely, if the magnetization strength of the sample is high, the recovery rate of magnetic deposits can be increased even if the magnetic flux density is decreased. Can be maintained high. On the other hand, it is understood that the recovery rate of magnetized materials is almost 0 for the pyrite.
磁化処理において炉内温度を500℃以上とし、磁力選鉱において磁束密度を1.0T以上とすることが好ましい。この条件であれば、黄銅鉱の磁着物回収率を90%以上とし、かつ輝水鉛鉱の磁着物回収率をほぼ0とでき、黄銅鉱と輝水鉛鉱を十分に分離できる。 It is preferable that the temperature in the furnace is 500 ° C. or more in the magnetization treatment and the magnetic flux density is 1.0 T or more in the magnetic separation. Under these conditions, the recovery rate of chalcopyrite magnetic deposits can be 90% or more, and the recovery rate of pyroxenite ore deposits can be almost zero, so that chalcopyrite and hydropyrite can be sufficiently separated.
（実施例２）黄銅鉱と硫砒銅鉱の分離
（１）試料調整
純粋な黄銅鉱および硫砒銅鉱の試料を準備し、それぞれに対して粒度調整を行った。粒度調整の手順や条件は実施例１と同一である。粒度調整により、黄銅鉱の粒度を38〜125μm、硫砒銅鉱の粒度を38〜125μmとした。
(Example 2) Separation of chalcopyrite and arsenite (1) Sample preparation Samples of pure chalcopyrite and arsenite were prepared, and the particle size was adjusted for each. The procedure and conditions for adjusting the particle size are the same as in Example 1. By adjusting the particle size, the particle size of chalcopyrite was 38 to 125 μm, and the particle size of arsenite was 38 to 125 μm.
（２）磁化処理
（１）で調整した黄銅鉱および硫砒銅鉱の試料を複数用意した。各試料の重量は0.5gとした。各試料に対して磁化処理を行い、磁化処理後の試料の磁化強度を測定した。磁化処理の手順および磁化強度の測定方法は実施例１と同一である。
(2) Magnetization treatment A plurality of chalcopyrite and arsenite samples prepared in (1) were prepared. The weight of each sample was 0.5 g. Each sample was subjected to magnetization treatment, and the magnetization intensity of the sample after the magnetization treatment was measured. The procedure of the magnetization process and the method for measuring the magnetization intensity are the same as those in the first embodiment.
各試料の磁化強度を図５に示す。図５中「Chalcopyrite」は黄銅鉱を意味し、「Enargite」は硫砒銅鉱を意味する。図５より、黄銅鉱は炉内温度が高いほど磁化強度が強くなることが分かる。一方、硫砒銅鉱は何れの条件においても磁化強度がほぼ0であることが分かる。 The magnetization intensity of each sample is shown in FIG. In FIG. 5, “Chalcopyrite” means chalcopyrite and “Enargite” means arsenite. From FIG. 5, it can be seen that chalcopyrite has a stronger magnetization strength as the furnace temperature is higher. On the other hand, it is understood that the magnetite strength of arsenite is almost zero under any conditions.
（３）磁力選鉱
（２）で磁化処理した後の試料に対して磁力選鉱を行い、磁着物回収率を求めた。磁力選鉱の手順は実施例１と同一である。
(3) Magnetic beneficiation The sample after being magnetized in (2) was subjected to magnetic beneficiation to determine the magnetic deposit recovery rate. The procedure of magnetic separation is the same as in Example 1.
図６に各試料の磁着物回収率を示す。図６中「cpy」は黄銅鉱を意味し、「Enargite」は硫砒銅鉱を意味する。図６より、黄銅鉱は炉内温度が高いほど磁着物回収率が高いことが分かる。硫砒銅鉱は磁束密度が0.5T以下であれば磁着物回収率が十分に小さいことが分かる。 FIG. 6 shows the magnetic deposit recovery rate of each sample. In FIG. 6, “cpy” means chalcopyrite and “Enargite” means arsenite. From FIG. 6, it can be seen that chalcopyrite has a higher recovery rate of magnetic deposits as the furnace temperature increases. Arsenite has a sufficiently low magnetic deposit recovery rate when the magnetic flux density is 0.5T or less.
磁化処理において炉内温度を750℃以上とし、磁力選鉱において磁束密度を約1.0Tとすることが好ましい。この条件であれば、黄銅鉱の磁着物回収率を90%以上とし、かつ硫砒銅鉱の磁着物回収率をほぼ0とでき、黄銅鉱と硫砒銅鉱を十分に分離できる。 It is preferable that the temperature in the furnace is set to 750 ° C. or higher in the magnetization process, and the magnetic flux density is set to about 1.0 T in the magnetic separation. Under these conditions, the recovery rate of the magnetic deposits of chalcopyrite can be 90% or more, and the recovery rate of the magnetic deposits of arsenite can be almost zero, so that the chalcopyrite and the arsenite can be sufficiently separated.
（実施例３）黄銅鉱と砒四面銅鉱の分離
（１）試料調整
純粋な黄銅鉱および砒四面銅鉱の試料を準備し、それぞれに対して粒度調整を行った。粒度調整の手順や条件は実施例１と同一である。粒度調整により、黄銅鉱の粒度を38〜125μm、砒四面銅鉱の粒度を38〜125μmとした。
(Example 3) Separation of chalcopyrite and arsenic tetrahedrite (1) Sample preparation Samples of pure chalcopyrite and arsenic tetrahedrite were prepared and the particle size was adjusted for each. The procedure and conditions for adjusting the particle size are the same as in Example 1. By adjusting the particle size, the particle size of chalcopyrite was 38-125 μm, and the particle size of arsenic tetrahedrite was 38-125 μm.
（２）磁化処理
（１）で調整した黄銅鉱および砒四面銅鉱の試料を複数用意した。各試料の重量は0.5gとした。各試料に対して磁化処理を行い、磁化処理後の試料の磁化強度を測定した。磁化処理の手順および磁化強度の測定方法は実施例１と同一である。
(2) Magnetization treatment A plurality of samples of chalcopyrite and arsenic tetrahedrite prepared in (1) were prepared. The weight of each sample was 0.5 g. Each sample was subjected to magnetization treatment, and the magnetization intensity of the sample after the magnetization treatment was measured. The procedure of the magnetization process and the method for measuring the magnetization intensity are the same as those in the first embodiment.
各試料の磁化強度を図７に示す。図７中「cpy」は黄銅鉱を意味し、「Tenn」は砒四面銅鉱を意味する。図７より、黄銅鉱は炉内温度が高いほど磁化強度が強くなることが分かる。一方、砒四面銅鉱は炉内温度が750℃以下の場合には磁化強度がほぼ0である。しかし、炉内温度が1,000℃の場合には黄銅鉱の磁化強度よりも弱いものの磁化されていることが分かる。 The magnetization intensity of each sample is shown in FIG. In FIG. 7, “cpy” means chalcopyrite, and “Tenn” means arsenic tetrahedrite. From FIG. 7, it can be seen that the strength of magnetization of chalcopyrite increases as the furnace temperature increases. On the other hand, the magnetic strength of arsenic tetrahedral copper ore is almost zero when the furnace temperature is 750 ° C or lower. However, it can be seen that when the furnace temperature is 1,000 ° C., the magnetization is weaker than the magnetization intensity of chalcopyrite.
（３）磁力選鉱
（２）で磁化処理した後の試料に対して磁力選鉱を行い、磁着物回収率を求めた。磁力選鉱の手順は実施例１と同一である。
(3) Magnetic beneficiation The sample after being magnetized in (2) was subjected to magnetic beneficiation to determine the magnetic deposit recovery rate. The procedure of magnetic separation is the same as in Example 1.
図８に各試料の磁着物回収率を示す。図８中「cpy」は黄銅鉱を意味し、「Tenn」は砒四面銅鉱を意味する。図８より、黄銅鉱は炉内温度が高いほど磁着物回収率が高いことが分かる。砒四面銅鉱は炉内温度が750℃以下であり、磁束密度が1.0T以下であれば磁着物回収率がほぼ0であることが分かる。 FIG. 8 shows the magnetic deposit recovery rate of each sample. In FIG. 8, “cpy” means chalcopyrite and “Tenn” means arsenic tetrahedrite. From FIG. 8, it can be seen that chalcopyrite has a higher recovery rate of magnetic deposits as the furnace temperature increases. Arsenic tetrahedral copper ore has a furnace temperature of 750 ° C or lower, and the magnetic deposit recovery rate is almost zero when the magnetic flux density is 1.0T or lower.
磁化処理において炉内温度を500℃以上750℃以下とし、磁力選鉱において磁束密度を約1.0Tとすることが好ましい。この条件であれば、黄銅鉱の磁着物回収率を90%以上とし、かつ砒四面銅鉱の磁着物回収率をほぼ0とでき、黄銅鉱と砒四面銅鉱を十分に分離できる。 It is preferable that the temperature in the furnace is set to 500 ° C. or higher and 750 ° C. or lower in the magnetization treatment, and the magnetic flux density is set to about 1.0 T in the magnetic separation. Under these conditions, the magnetite recovery rate of chalcopyrite can be set to 90% or more, and the magnetite recovery rate of arsenic tetrahedrite can be almost zero, so that chalcopyrite and arsenic tetrahedrite can be sufficiently separated.
（実施例４）黄銅鉱と硫砒鉄鉱の分離
（１）試料調整
純粋な黄銅鉱および硫砒鉄鉱の試料を準備し、それぞれに対して粒度調整を行った。粒度調整の手順や条件は実施例１と同一である。粒度調整により、黄銅鉱の粒度を38〜125μm、硫砒鉄鉱の粒度を38〜125μmとした。
(Example 4) Separation of chalcopyrite and arsenite (1) Sample preparation Samples of pure chalcopyrite and arsenite were prepared and the particle size was adjusted for each. The procedure and conditions for adjusting the particle size are the same as in Example 1. By adjusting the particle size, the particle size of chalcopyrite was 38-125 μm, and the particle size of arsenite was 38-125 μm.
（２）磁化処理
（１）で調整した黄銅鉱および硫砒鉄鉱の試料を複数用意した。各試料の重量は0.5gとした。各試料に対して磁化処理を行い、磁化処理後の試料の磁化強度を測定した。磁化処理の手順および磁化強度の測定方法は実施例１と同一である。
(2) Magnetization treatment A plurality of chalcopyrite and arsenite samples prepared in (1) were prepared. The weight of each sample was 0.5 g. Each sample was subjected to magnetization treatment, and the magnetization intensity of the sample after the magnetization treatment was measured. The procedure of the magnetization process and the method for measuring the magnetization intensity are the same as those in the first embodiment.
各試料の磁化強度を図９に示す。図９中「cpy」は黄銅鉱を意味し、「Aspy」は硫砒鉄鉱を意味する。図９より、黄銅鉱は炉内温度が高いほど磁化強度が強くなることが分かる。硫砒鉄鉱は炉内温度が750℃以下の場合には磁化強度がほぼ0である。しかし、炉内温度が1,000℃の場合には黄銅鉱の磁化強度よりも弱いものの磁化されていることが分かる。 The magnetization intensity of each sample is shown in FIG. In FIG. 9, “cpy” means chalcopyrite, and “Aspy” means arsenite. From FIG. 9, it can be seen that chalcopyrite has a stronger magnetization strength as the furnace temperature is higher. Arsenite has almost zero magnetization strength when the furnace temperature is 750 ℃ or less. However, it can be seen that when the furnace temperature is 1,000 ° C., the magnetization is weaker than the magnetization intensity of chalcopyrite.
（３）磁力選鉱
（２）で磁化処理した後の試料に対して磁力選鉱を行い、磁着物回収率を求めた。磁力選鉱の手順は実施例１と同一である。
(3) Magnetic beneficiation The sample after being magnetized in (2) was subjected to magnetic beneficiation to determine the magnetic deposit recovery rate. The procedure of magnetic separation is the same as in Example 1.
図１０に各試料の磁着物回収率を示す。図１０中「cpy」は黄銅鉱を意味し、「Aspy」は硫砒鉄鉱を意味する。図１０より、黄銅鉱は炉内温度が高いほど磁着物回収率が高いことが分かる。硫砒鉄鉱は炉内温度が750℃以下であれば磁着物回収率がほぼ0であることが分かる。 FIG. 10 shows the magnetic deposit recovery rate of each sample. In FIG. 10, “cpy” means chalcopyrite and “Aspy” means arsenite. From FIG. 10, it can be seen that chalcopyrite has a higher magnetic deposit recovery rate as the furnace temperature increases. Arsenite has a magnetic deposit recovery rate of almost zero when the furnace temperature is 750 ° C or lower.
磁化処理において炉内温度を500℃以上750℃以下とし、磁力選鉱において磁束密度を1.0T以上にすることが好ましい。この条件であれば、黄銅鉱の磁着物回収率を90%以上とし、かつ硫砒鉄鉱の磁着物回収率をほぼ0とでき、黄銅鉱と硫砒鉄鉱を十分に分離できる。 It is preferable that the temperature in the furnace is set to 500 ° C. or higher and 750 ° C. or lower in the magnetization treatment, and the magnetic flux density is set to 1.0 T or higher in the magnetic separation. Under these conditions, the recovery rate of the magnetic deposits of chalcopyrite can be set to 90% or more, and the recovery rate of the magnetic deposits of the arsenite can be almost zero, and the chalcopyrite and the arsenite can be sufficiently separated.
（実施例５）黄銅鉱と黄鉄鉱の分離
（１）試料調整
純粋な黄銅鉱および黄鉄鉱の試料を準備し、それぞれに対して粒度調整を行った。粒度調整の手順や条件は実施例１と同一である。粒度調整により、黄銅鉱の粒度を38〜125μm、黄鉄鉱の粒度を38〜125μmとした。
(Example 5) Separation of chalcopyrite and pyrite (1) Sample preparation Pure chalcopyrite and pyrite samples were prepared, and the particle size was adjusted for each. The procedure and conditions for adjusting the particle size are the same as in Example 1. By adjusting the particle size, the particle size of chalcopyrite was 38-125 μm, and the particle size of pyrite was 38-125 μm.
（２）磁化処理
（１）で調整した黄銅鉱および黄鉄鉱の試料を複数用意した。各試料の重量は0.5gとした。各試料に対して磁化処理を行い、磁化処理後の試料の磁化強度を測定した。磁化処理の手順および磁化強度の測定方法は実施例１と同一である。
(2) Magnetization treatment A plurality of chalcopyrite and pyrite samples prepared in (1) were prepared. The weight of each sample was 0.5 g. Each sample was subjected to magnetization treatment, and the magnetization intensity of the sample after the magnetization treatment was measured. The procedure of the magnetization process and the method for measuring the magnetization intensity are the same as those in the first embodiment.
各試料の磁化強度を図１１に示す。図１１中「cpy」は黄銅鉱を意味し、「py」は黄鉄鉱を意味する。図１１より、黄銅鉱と黄鉄鉱のいずれも炉内温度が高いほど磁化強度が強くなることが分かる。炉内温度が1000℃の場合に黄鉄鉱は黄銅鉱に比べて磁化強度が強いことが分かる。 The magnetization intensity of each sample is shown in FIG. In FIG. 11, “cpy” means chalcopyrite, and “py” means pyrite. From FIG. 11, it can be seen that both the chalcopyrite and the pyrite have stronger magnetization strength as the furnace temperature is higher. It can be seen that when the furnace temperature is 1000 ° C, pyrite has a stronger magnetization strength than chalcopyrite.
（３）磁力選鉱
（２）で磁化処理した後の試料に対して磁力選鉱を行い、磁着物回収率を求めた。磁力選鉱の手順は実施例１と同一である。
(3) Magnetic beneficiation The sample after being magnetized in (2) was subjected to magnetic beneficiation to determine the magnetic deposit recovery rate. The procedure of magnetic separation is the same as in Example 1.
図１２に各試料の磁着物回収率を示す。図１２中「cpy」は黄銅鉱を意味し、「Py」は黄鉄鉱を意味する。図１２より、黄銅鉱は炉内温度が高いほど磁着物回収率が高いことが分かる。黄鉄鉱は炉内温度が250℃以下であれば磁着物回収率がほぼ0である。 FIG. 12 shows the magnetic deposit recovery rate of each sample. In FIG. 12, “cpy” means chalcopyrite, and “Py” means pyrite. From FIG. 12, it can be seen that chalcopyrite has a higher magnetic deposit recovery rate as the furnace temperature increases. Pyrite has a magnetic deposit recovery rate of almost 0 when the furnace temperature is 250 ° C or lower.
磁化処理において炉内温度を200℃以上250℃以下とし、磁力選鉱において磁束密度を2.0T以上とすることが好ましい。この条件であれば、黄銅鉱の磁着物回収率を50%以上とし、かつ黄鉄鉱の磁着物回収率をほぼ0とでき、黄銅鉱と黄鉄鉱を十分に分離できる。 It is preferable that the temperature in the furnace is 200 ° C. or more and 250 ° C. or less in the magnetization treatment, and the magnetic flux density is 2.0 T or more in the magnetic separation. Under these conditions, the recovery rate of pyrite magnetic deposits can be set to 50% or more, and the recovery rate of pyrite magnetic deposits can be substantially zero, so that pyrite and pyrite can be sufficiently separated.
（実施例６）黄鉄鉱と輝水鉛鉱の分離
（１）試料調整
純粋な黄鉄鉱および輝水鉛鉱の試料を準備し、それぞれに対して粒度調整を行った。粒度調整の手順や条件は実施例１と同一である。粒度調整により、黄鉄鉱の粒度を38〜125μm、輝水鉛鉱の粒度を1mm以下とした。
(Example 6) Separation of pyrite and chalcocite (1) Sample preparation Pure pyrite and chalcocite samples were prepared and the particle size was adjusted for each. The procedure and conditions for adjusting the particle size are the same as in Example 1. By adjusting the particle size, the particle size of pyrite was 38-125 μm, and the particle size of hydropyrite was 1 mm or less.
（２）磁化処理
（１）で調整した黄鉄鉱および輝水鉛鉱の試料を複数用意した。各試料の重量は0.5gとした。各試料に対して磁化処理を行い、磁化処理後の試料の磁化強度を測定した。磁化処理の手順および磁化強度の測定方法は実施例１と同一である。
(2) Magnetization treatment A plurality of pyrite and pyroxenite samples prepared in (1) were prepared. The weight of each sample was 0.5 g. Each sample was subjected to magnetization treatment, and the magnetization intensity of the sample after the magnetization treatment was measured. The procedure of the magnetization process and the method for measuring the magnetization intensity are the same as those in the first embodiment.
各試料の磁化強度を図１３に示す。図１３中「Pyrite」は黄鉄鉱を意味し、「Molybdenite」は輝水鉛鉱を意味する。図１３より、黄鉄鉱は炉内温度が高いほど磁化強度が強くなることが分かる。一方、輝水鉛鉱は何れの条件においても磁化強度がほぼ0であることが分かる。 The magnetization intensity of each sample is shown in FIG. In FIG. 13, “Pyrite” means pyrite, and “Molybdenite” means molybdenite. It can be seen from FIG. 13 that the pyrite has a higher magnetization strength as the furnace temperature is higher. On the other hand, it is understood that the magnetite strength is almost zero under any conditions.
（３）磁力選鉱
（２）で磁化処理した後の試料に対して磁力選鉱を行い、磁着物回収率を求めた。磁力選鉱の手順は実施例１と同一である。
(3) Magnetic beneficiation The sample after being magnetized in (2) was subjected to magnetic beneficiation to determine the magnetic deposit recovery rate. The procedure of magnetic separation is the same as in Example 1.
図１４に各試料の磁着物回収率を示す。図１４中「Py」は黄鉄鉱を意味し、「Molybd」は輝水鉛鉱を意味する。図１４より、黄鉄鉱は炉内温度が高いほど磁着物回収率が高いことが分かる。一方、輝水鉛鉱は何れの条件においても磁着物回収率はほぼ0であることが分かる。 FIG. 14 shows the magnetic deposit recovery rate of each sample. In FIG. 14, “Py” means pyrite, and “Molybd” means molybdenite. FIG. 14 shows that pyrite has a higher recovery rate of magnetic deposits as the furnace temperature increases. On the other hand, it is understood that the recovery rate of magnetized materials is almost 0 for the pyrite.
磁化処理において炉内温度を500℃以上とし、磁力選鉱において磁束密度を1.0T以上とすることが好ましい。また、磁化処理において炉内温度を750℃以上としてもよい。これらの条件であれば、黄鉄鉱の磁着物回収率を80%以上とし、かつ輝水鉛鉱の磁着物回収率をほぼ0とできる。より好ましくは、磁化処理において炉内温度を500℃以上とし、磁力選鉱において磁束密度を2.0T以上としてもよい。また、磁化処理において炉内温度を750℃以上とし、磁力選鉱において磁束密度を1.0T以上としてもよい。これらの条件であれば、黄鉄鉱の磁着物回収率を90%以上とし、かつ輝水鉛鉱の磁着物回収率をほぼ0とでき、黄鉄鉱と輝水鉛鉱を十分に分離できる。 It is preferable that the temperature in the furnace is 500 ° C. or more in the magnetization treatment and the magnetic flux density is 1.0 T or more in the magnetic separation. Further, the furnace temperature may be set to 750 ° C. or higher in the magnetization process. Under these conditions, the magnetite recovery rate of pyrite can be set to 80% or more, and the magnetite recovery rate of pyroxenite can be almost zero. More preferably, the furnace temperature may be set to 500 ° C. or higher in the magnetic treatment, and the magnetic flux density may be set to 2.0 T or higher in the magnetic separation. Further, the temperature in the furnace may be set to 750 ° C. or higher in the magnetization treatment, and the magnetic flux density may be set to 1.0 T or higher in the magnetic separation. Under these conditions, the recovery rate of pyrite magnetic deposits can be 90% or more, and the recovery rate of pyroxenite magnetic deposits can be almost zero, so that pyrite and pyroxenite can be sufficiently separated.
（実施例７）黄鉄鉱と硫砒鉄鉱の分離
（１）試料調整
純粋な黄鉄鉱および硫砒鉄鉱の試料を準備し、それぞれに対して粒度調整を行った。粒度調整の手順や条件は実施例１と同一である。粒度調整により、黄鉄鉱の粒度を38〜125μm、硫砒鉄鉱の粒度を38〜125μmとした。
(Example 7) Separation of pyrite and arsenite (1) Sample preparation Pure pyrite and arsenite samples were prepared, and the particle size was adjusted for each. The procedure and conditions for adjusting the particle size are the same as in Example 1. By adjusting the particle size, the particle size of pyrite was 38 to 125 μm, and the particle size of arsenite was 38 to 125 μm.
（２）磁化処理
（１）で調整した黄鉄鉱および硫砒鉄鉱の試料を複数用意した。各試料の重量は0.5gとした。各試料に対して磁化処理を行い、磁化処理後の試料の磁化強度を測定した。磁化処理の手順および磁化強度の測定方法は実施例１と同一である。
(2) Magnetization treatment A plurality of pyrite and arsenite samples prepared in (1) were prepared. The weight of each sample was 0.5 g. Each sample was subjected to magnetization treatment, and the magnetization intensity of the sample after the magnetization treatment was measured. The procedure of the magnetization process and the method for measuring the magnetization intensity are the same as those in the first embodiment.
各試料の磁化強度を図１５に示す。図１５中「Pyrite」は黄鉄鉱を意味し、「Arsenopyrite」は硫砒鉄鉱を意味する。図１５より、黄鉄鉱は炉内温度が高いほど磁化強度が強くなることが分かる。硫砒鉄鉱は炉内温度が750℃以下の場合には磁化強度がほぼ0である。しかし、炉内温度が1,000℃の場合には黄鉄鉱の磁化強度よりも弱いものの磁化されていることが分かる。 The magnetization intensity of each sample is shown in FIG. In FIG. 15, “Pyrite” means pyrite and “Arsenopyrite” means arsenite. From FIG. 15, it can be seen that pyrite has higher magnetization strength as the furnace temperature is higher. Arsenite has almost zero magnetization strength when the furnace temperature is 750 ℃ or less. However, it can be seen that when the furnace temperature is 1,000 ° C., the magnetization is weaker than the magnetization intensity of pyrite.
（３）磁力選鉱
（２）で磁化処理した後の試料に対して磁力選鉱を行い、磁着物回収率を求めた。磁力選鉱の手順は実施例１と同一である。
(3) Magnetic beneficiation The sample after being magnetized in (2) was subjected to magnetic beneficiation to determine the magnetic deposit recovery rate. The procedure of magnetic separation is the same as in Example 1.
図１６に各試料の磁着物回収率を示す。図１６中「Py」は黄鉄鉱を意味し、「Aspy」は硫砒鉄鉱を意味する。図１６より、黄鉄鉱は炉内温度が高いほど磁着物回収率が高いことが分かる。硫砒鉄鉱は炉内温度が750℃以下であれば磁着物回収率がほぼ0であることが分かる。 FIG. 16 shows the magnetic deposit recovery rate of each sample. In FIG. 16, “Py” means pyrite and “Aspy” means arsenite. FIG. 16 shows that pyrite has a higher recovery rate of magnetic deposits as the furnace temperature is higher. Arsenite has a magnetic deposit recovery rate of almost zero when the furnace temperature is 750 ° C or lower.
磁化処理において炉内温度を500℃以上750℃以下とし、磁力選鉱において磁束密度を1.0T以上にすることが好ましい。この条件であれば、黄鉄鉱の磁着物回収率を80%以上とし、かつ硫砒鉄鉱の磁着物回収率をほぼ0とできる。より好ましくは、磁化処理において炉内温度を500℃以上750℃以下とし、磁力選鉱において磁束密度を2.0T以上にすればよい。この条件であれば、黄鉄鉱の磁着物回収率を90%以上とし、かつ硫砒鉄鉱の磁着物回収率をほぼ0とでき、黄鉄鉱と硫砒鉄鉱を十分に分離できる。 It is preferable that the temperature in the furnace is set to 500 ° C. or higher and 750 ° C. or lower in the magnetization treatment, and the magnetic flux density is set to 1.0 T or higher in the magnetic separation. Under these conditions, the recovery rate of pyrite magnetic deposits can be 80% or more, and the recovery rate of magnetite deposits of arsenite can be almost zero. More preferably, the temperature in the furnace is set to 500 ° C. or higher and 750 ° C. or lower in the magnetization treatment, and the magnetic flux density is set to 2.0 T or higher in the magnetic separation. Under these conditions, the recovery rate of pyrite magnetic deposits can be 90% or more, and the recovery rate of pyrite and magnetite deposits can be almost zero, and pyrite and arsenite can be sufficiently separated.
１ 交流対極磁選機
１１ 電磁ドラム
１２ 磁着物排出口
１３ 非磁着物排出口
DESCRIPTION OF SYMBOLS 1 AC counter magnetic separator 11 Electromagnetic drum 12 Magnetic deposit discharge port 13 Non-magnetic deposit discharge port
Claims (5)
前記磁化工程の後に、前記原料を磁着物と非磁着物に分離する磁力選鉱工程と、を備え、
前記原料には黄銅鉱および硫砒銅鉱が含まれており、
前記磁化工程において、炉内温度を750℃以上とし、
前記磁力選鉱工程において、磁束密度を約1.0Tとし、
前記磁力選鉱工程において、前記原料を前記原料よりも黄銅鉱の品位が高い前記磁着物と前記原料よりも硫砒銅鉱の品位が高い前記非磁着物とに分離する
ことを特徴とする選鉱方法。 A magnetization process in which a raw material containing a plurality of types of pulverized minerals is heated to magnetize some of the minerals;
A magnetic separation process for separating the raw material into a magnetized product and a non-magnetized product after the magnetization step;
The raw materials include chalcopyrite and arsenite,
In the magnetization step, the furnace temperature is 750 ° C. or higher,
In the magnetic separation process, the magnetic flux density is about 1.0 T ,
In the magnetic separation process, the raw material is separated into the magnetic deposit having a higher grade of chalcopyrite than the raw material and the non-magnetic deposit having a higher grade of arsenite than the raw material . that election ore method.
前記磁化工程の後に、前記原料を磁着物と非磁着物に分離する磁力選鉱工程と、を備え、
前記原料には黄銅鉱および砒四面銅鉱が含まれており、
前記磁化工程において、炉内温度を500℃以上750℃以下とし、
前記磁力選鉱工程において、磁束密度を1.0T以上とし、
前記磁力選鉱工程において、前記原料を前記原料よりも黄銅鉱の品位が高い前記磁着物と前記原料よりも砒四面銅鉱の品位が高い前記非磁着物とに分離する
ことを特徴とする選鉱方法。 A magnetization process in which a raw material containing a plurality of types of pulverized minerals is heated to magnetize some of the minerals;
A magnetic separation process for separating the raw material into a magnetized product and a non-magnetized product after the magnetization step;
The raw materials include chalcopyrite and arsenic tetrahedral copper ore,
In the magnetization step, the furnace temperature is 500 ° C. or more and 750 ° C. or less,
In the magnetic separation process, the magnetic flux density is 1.0 T or more ,
In the magnetic separation process, the raw material is separated into the magnetic deposit having a higher grade of chalcopyrite than the raw material and the non-magnetic deposit having a higher grade of arsenic tetragonal copper than the raw material. that election ore how to be.
前記磁化工程の後に、前記原料を磁着物と非磁着物に分離する磁力選鉱工程と、を備え、
前記原料には黄銅鉱および硫砒鉄鉱が含まれており、
前記磁化工程において、炉内温度を500℃以上750℃以下とし、
前記磁力選鉱工程において、磁束密度を1.0T以上とし、
前記磁力選鉱工程において、前記原料を前記原料よりも黄銅鉱の品位が高い前記磁着物と前記原料よりも硫砒鉄鉱の品位が高い前記非磁着物とに分離する
ことを特徴とする選鉱方法。 A magnetization process in which a raw material containing a plurality of types of pulverized minerals is heated to magnetize some of the minerals;
A magnetic separation process for separating the raw material into a magnetized product and a non-magnetized product after the magnetization step;
The raw materials include chalcopyrite and arsenite,
In the magnetization step, the furnace temperature is 500 ° C. or more and 750 ° C. or less,
In the magnetic separation process, the magnetic flux density is 1.0 T or more ,
In the magnetic separation process, the raw material is separated into the magnetic deposit having a higher grade of chalcopyrite than the raw material and the non-magnetic deposit having a higher grade of pyrite than the raw material . that election ore method.
前記磁化工程の後に、前記原料を磁着物と非磁着物に分離する磁力選鉱工程と、を備え、
前記原料には黄銅鉱および黄鉄鉱が含まれており、
前記磁化工程において、炉内温度を200℃以上250℃以下とし、
前記磁力選鉱工程において、磁束密度を2.0T以上とする
ことを特徴とする選鉱方法。 A magnetization process in which a raw material containing a plurality of types of pulverized minerals is heated to magnetize some of the minerals;
A magnetic separation process for separating the raw material into a magnetized product and a non-magnetized product after the magnetization step;
The raw material contains chalcopyrite and pyrite,
In the magnetization step, the furnace temperature is 200 ° C. or more and 250 ° C. or less,
In the magnetic separation step, wherein the to that election ore method to the magnetic flux density than 2.0 T.
前記磁化工程の後に、前記原料を磁着物と非磁着物に分離する磁力選鉱工程と、を備え、
前記原料には黄鉄鉱および硫砒鉄鉱が含まれており、
前記磁化工程において、炉内温度を500℃以上750℃以下とし、
前記磁力選鉱工程において、磁束密度を1.0T以上とし、
前記磁力選鉱工程において、前記原料を前記原料よりも黄鉄鉱の品位が高い前記磁着物と前記原料よりも硫砒鉄鉱の品位が高い前記非磁着物とに分離する
ことを特徴とする選鉱方法。 A magnetization process in which a raw material containing a plurality of types of pulverized minerals is heated to magnetize some of the minerals;
A magnetic separation process for separating the raw material into a magnetized product and a non-magnetized product after the magnetization step;
The raw materials include pyrite and arsenite,
In the magnetization step, the furnace temperature is 500 ° C. or more and 750 ° C. or less,
In the magnetic separation process, the magnetic flux density is 1.0 T or more ,
In the magnetic separation step, characterized by <br/> separating said feedstock into a grade of arsenopyrite higher the non-magnetically attracted material than the material and the magnetically attracted material quality of pyrite is higher than the raw select ore method.
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