JP2018145479A - Recovery method of platinum group metals - Google Patents
Recovery method of platinum group metals Download PDFInfo
- Publication number
- JP2018145479A JP2018145479A JP2017042068A JP2017042068A JP2018145479A JP 2018145479 A JP2018145479 A JP 2018145479A JP 2017042068 A JP2017042068 A JP 2017042068A JP 2017042068 A JP2017042068 A JP 2017042068A JP 2018145479 A JP2018145479 A JP 2018145479A
- Authority
- JP
- Japan
- Prior art keywords
- metal
- platinum group
- group metal
- molten
- raw material
- 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.)
- Pending
Links
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 146
- 239000002184 metal Substances 0.000 title claims abstract description 141
- 238000000034 method Methods 0.000 title claims abstract description 34
- 238000011084 recovery Methods 0.000 title claims abstract description 8
- -1 platinum group metals Chemical class 0.000 title abstract description 8
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical group [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims abstract description 89
- 239000002994 raw material Substances 0.000 claims abstract description 36
- 239000002893 slag Substances 0.000 claims abstract description 34
- 239000010949 copper Substances 0.000 claims abstract description 24
- 229910052802 copper Inorganic materials 0.000 claims abstract description 20
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 18
- 230000004907 flux Effects 0.000 claims abstract description 17
- 230000008569 process Effects 0.000 claims abstract description 12
- 238000002844 melting Methods 0.000 claims abstract description 11
- 230000008018 melting Effects 0.000 claims abstract description 11
- 239000000203 mixture Substances 0.000 claims description 8
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 7
- 238000003723 Smelting Methods 0.000 claims description 7
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 3
- 239000008188 pellet Substances 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 2
- 229910052709 silver Inorganic materials 0.000 claims 1
- 239000002699 waste material Substances 0.000 abstract description 11
- 239000002253 acid Substances 0.000 abstract description 3
- 238000000746 purification Methods 0.000 abstract description 3
- 230000003647 oxidation Effects 0.000 abstract description 2
- 238000007254 oxidation reaction Methods 0.000 abstract description 2
- 239000012530 fluid Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 description 11
- 239000003054 catalyst Substances 0.000 description 10
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 6
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 5
- 238000009826 distribution Methods 0.000 description 5
- 239000000292 calcium oxide Substances 0.000 description 4
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 229910052697 platinum Inorganic materials 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 3
- 239000005751 Copper oxide Substances 0.000 description 3
- 229910000431 copper oxide Inorganic materials 0.000 description 3
- 230000001590 oxidative effect Effects 0.000 description 3
- 229910052763 palladium Inorganic materials 0.000 description 3
- 238000003672 processing method Methods 0.000 description 3
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- QZPSXPBJTPJTSZ-UHFFFAOYSA-N aqua regia Chemical compound Cl.O[N+]([O-])=O QZPSXPBJTPJTSZ-UHFFFAOYSA-N 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000012776 electronic material Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000009616 inductively coupled plasma Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000010970 precious metal Substances 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000010948 rhodium Substances 0.000 description 1
- 229910052703 rhodium Inorganic materials 0.000 description 1
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
Landscapes
- Processing Of Solid Wastes (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Electrolytic Production Of Metals (AREA)
Abstract
Description
本発明は、使用済み自動車排ガス浄化用触媒、使用済み石油化学系触媒、使用済み電子基板やリードフレーム、白金族含有ブラスト粉等の白金族金属元素を含有する各種リサイクル材や廃材から白金族金属元素を回収する方法に関する。 The present invention relates to platinum group metals from various recycled materials and waste materials containing platinum group metal elements such as used automobile exhaust gas purification catalysts, used petrochemical catalysts, used electronic boards and lead frames, and platinum group-containing blast powders. The present invention relates to a method for recovering elements.
使用済み電子基板やリードフレームなどの白金族金属元素を含有する電子材料、使用済み自動車排ガス浄化用触媒、使用済み石油化学系触媒などの白金族金属元素を有する触媒、白金族含有ブラスト粉などのリサイクル材や廃材を処理してそれらに含まれる白金族金属を分離・回収する方法としては、酸化力の強い王水等を用いて湿式で処理する方法があるが、この方法は多量の酸及び酸化剤を必要とする上、貴金属以外の化合物を多量に含む廃液が付随して発生するため、その処理コストがかさむなどの問題を抱えていた。 Electronic materials containing platinum group metal elements such as used electronic boards and lead frames, catalysts for purifying used automobile exhaust gas, catalysts containing platinum group metal elements such as used petrochemical catalysts, platinum group containing blast powder, etc. As a method for separating and recovering the platinum group metal contained in the processed recycled materials and waste materials, there is a method in which wet processing is performed using aqua regia having strong oxidizing power, but this method includes a large amount of acid and In addition to requiring an oxidizer, waste liquid containing a large amount of compounds other than precious metals is generated accompanying it, and thus the processing cost is increased.
そこで、上記の湿式処理法に代えて、乾式処理法により白金族金属を含有するリサイクル材や廃材から白金族金属元素を効率的に回収する方法が検討されており、例えば特許文献１に示すように、リサイクル材を銅源材料と共に加熱溶融し、これにより生成する溶融メタル中にリサイクル材の白金族金属を移行させて吸収する乾式回収法が提案されている。 Therefore, instead of the above-described wet processing method, a method of efficiently recovering a platinum group metal element from a recycled material or waste material containing a platinum group metal by a dry processing method has been studied. For example, as shown in Patent Document 1 In addition, there has been proposed a dry recovery method in which a recycled material is heated and melted together with a copper source material, and a platinum group metal of the recycled material is transferred and absorbed in a molten metal generated thereby.
具体的には、この特許文献１の技術は、白金族金属を含有するリサイクル材と、酸化銅を含有する銅源材料とを、フラックス成分および還元剤と共に電気炉に装入し、還元溶錬することで酸化物主体の溶融スラグ層の下方に金属銅主体の溶融メタルを沈降させ、その際、溶融メタル中に白金族金属を濃縮させている。この白金族金属が濃縮した溶融メタルは、溶融スラグから分別して別の炉に溶融状態のまま移し替えられ、そこで溶融メタルの酸化溶錬が行われる。これにより、銅の酸化物主体のスラグ層と白金族金属がさらに濃縮した溶融メタル層とに層分離する。尚、この白金族金属の乾式回収法では、電気炉から排出される溶融スラグは銅の含有量が３.０質量％以下にまで低下しており、別の炉で生成した溶融スラグは高温状態から水冷することにより酸化銅を含有する粒径０.１ｍｍ以上１０ｍｍ以下の粒状物が得られると記載されている。 Specifically, the technology of Patent Document 1 is a method in which a recycle material containing a platinum group metal and a copper source material containing copper oxide are charged into an electric furnace together with a flux component and a reducing agent, and reduction smelting is performed. By doing so, the molten metal mainly composed of copper metal is settled below the molten slag layer mainly composed of oxide, and at that time, the platinum group metal is concentrated in the molten metal. The molten metal enriched with the platinum group metal is separated from the molten slag and transferred to another furnace in a molten state, where the molten metal is oxidized and smelted. Thereby, the slag layer mainly composed of copper oxide and the molten metal layer in which the platinum group metal is further concentrated are separated. In this platinum group metal dry recovery method, the molten slag discharged from the electric furnace is reduced to a copper content of 3.0% by mass or less, and the molten slag produced in another furnace is in a high temperature state. It is described that a granular material containing copper oxide and having a particle size of 0.1 mm or more and 10 mm or less can be obtained by water cooling.
上記の特許文献１の技術を利用する事により、処理コストがかさむ廃液を生ずることなく湿式処理法に比べて短時間に白金族金属元素を回収することができるが、複数種類の多岐に亘るリサイクル材や廃材を処理する場合は銅の適切な酸化還元が極めて困難になるため、酸化物からなるスラグ中に白金族金属元素が混入してロスすることがあった。また、溶融スラグの水冷処理等の煩雑な工程を要するうえ、複数の大型電気炉が必要になるのでコストがかさむという問題を抱えていた。 By using the technique of the above-mentioned Patent Document 1, platinum group metal elements can be recovered in a short time compared to the wet processing method without generating waste liquid that increases processing costs. When processing materials and waste materials, appropriate oxidation and reduction of copper becomes extremely difficult, and thus platinum group metal elements may be mixed and lost in oxide slag. In addition, a complicated process such as a water-cooling treatment of the molten slag is required, and a plurality of large electric furnaces are required, which increases the cost.
本発明は、上記した従来の事情に鑑みてなされたものであり、処理困難な廃液を生ずる酸化力の強い酸を用いることなく効率よく白金族金属を回収することが可能な白金族金属の回収方法を提供することを目的としている。 The present invention has been made in view of the above-described conventional circumstances, and is capable of recovering a platinum group metal capable of efficiently recovering the platinum group metal without using a strong oxidizing power that produces a waste liquid that is difficult to process. It aims to provide a method.
すなわち、本発明に係る白金族金属の回収方法は、白金族金属含有原料を、スラグの低融点化用のフラックス成分及びコレクターメタルとしてのＡｇメタル又はＣｕメタルと共に電気炉に装入して１３００〜１６００℃で熔融し、これにより生成される上層側の熔融スラグ層と下側側の前記コレクターメタルからなる熔融メタル層のうち前記熔融メタル中に前記白金族金属含有原料中の白金族金属を濃縮することを特徴としている。 That is, in the platinum group metal recovery method according to the present invention, a platinum group metal-containing raw material is charged into an electric furnace together with a flux component for lowering the melting point of slag and Ag metal or Cu metal as a collector metal. The platinum group metal in the platinum group metal-containing raw material is concentrated in the molten metal out of the molten metal layer composed of the molten slag layer on the upper layer side and the collector metal on the lower side, which is melted at 1600 ° C. It is characterized by doing.
本発明によれば、処理困難な廃液を生ずる酸化力の強い酸を用いることなくスクラップなどの白金族金属含有原料に含まれる白金族金属を効率よく回収することができる。 ADVANTAGE OF THE INVENTION According to this invention, the platinum group metal contained in platinum group metal containing raw materials, such as a scrap, can be collect | recovered efficiently, without using the acid with strong oxidizing power which produces the waste liquid which is difficult to process.
以下、本発明の白金族金属の回収方法の一具体例について説明する。この本発明の一具体例の白金族金属の回収方法は、白金族金属含有原料をフラックス成分及びコレクターメタルと共にリサイクル炉などの電気炉に装入して熔融温度１３００〜１６００℃で熔融し、比重差により上層側の主に酸化物からなる熔融スラグ層と、下側側の主にコレクターメタルからなる熔融メタル層とを生成し、この熔融メタル層中に該白金族金属含有原料中の白金族金属を濃縮して回収するものである。 Hereinafter, a specific example of the platinum group metal recovery method of the present invention will be described. The platinum group metal recovery method according to one embodiment of the present invention is a method in which a platinum group metal-containing raw material is charged together with a flux component and a collector metal into an electric furnace such as a recycle furnace and melted at a melting temperature of 1300 to 1600 ° C. Due to the difference, a molten slag layer mainly made of an oxide on the upper layer side and a molten metal layer mainly made of a collector metal on the lower side are formed, and the platinum group in the platinum group metal-containing raw material is contained in the molten metal layer. The metal is concentrated and recovered.
上記の白金族金属含有原料とは、プラチナ、パラジウム等の白金族元素を含有する使用済み石油化学系触媒、プラチナ、パラジウム、ロジウム等の白金族元素を含有する使用済みの自動車排ガス浄化用触媒、それら触媒の製造段階において発生するロットアウト品やスクラップなど、さらにはパラジウム等の白金族元素を含有する使用済みの電子基板、デジタル機器の部品、リードフレーム、白金族含有ブラスト粉等を挙げることができる。 The above platinum group metal-containing raw materials are used petrochemical catalysts containing platinum group elements such as platinum and palladium, used automobile exhaust gas purification catalysts containing platinum group elements such as platinum, palladium and rhodium, Examples include lot-out products and scrap generated in the manufacturing stage of these catalysts, used electronic boards containing platinum group elements such as palladium, parts of digital equipment, lead frames, platinum group-containing blast powder, etc. it can.
このような白金族金属含有原料と共に装入されるフラックス成分としては、シリカ（ＳｉＯ２）、酸化カルシウム（ＣａＯ）、炭酸ナトリウム（Ｎａ２ＣＯ３）、酸化マグネシウム（ＭｇＯ）等を使用するのが好ましい。このフラックス成分の配合量は、熔融スラグを低融点化させて上記の熔融温度範囲内で熔融するように白金族金属含有原料の種類に応じて適宜調整される。例えばＡｌ２Ｏ３が主成分である白金族金属含有リサイクル材を処理する場合は、フラックス成分としてＣａＯ及びＳｉＯ２を使用し、それらの添加量を溶融スラグの組成が質量基準でＡｌ２Ｏ３：４０〜５０％、ＣａＯ：４０〜５０％、ＳｉＯ２：０〜１０％となるように調整するのが好ましい。これによりフラックス成分の添加比率を極力少なくでき、原料を効率的に処理することができる。ただし、調整後の組成により、熔融スラグの粘性が大きく変化することがあるため、必要に応じて熔融温度を昇降させたり、装入量を増減させてセトリング時間を調整したりすることが好ましい。 Silica (SiO 2 ), calcium oxide (CaO), sodium carbonate (Na 2 CO 3 ), magnesium oxide (MgO) and the like are used as the flux component charged together with such a platinum group metal-containing raw material. preferable. The blending amount of the flux component is appropriately adjusted according to the type of the platinum group metal-containing raw material so as to lower the melting point of the molten slag and melt it within the above melting temperature range. For example, when a platinum group metal-containing recycled material containing Al 2 O 3 as a main component is processed, CaO and SiO 2 are used as flux components, and the amount of these added is Al 2 O 3 based on the composition of the molten slag. : 40~50%, CaO: 40~50% , SiO 2: preferably adjusted to 0 to 10%. Thereby, the addition ratio of a flux component can be reduced as much as possible, and a raw material can be processed efficiently. However, since the viscosity of the molten slag may change greatly depending on the composition after adjustment, it is preferable to raise or lower the melting temperature or adjust the settling time by increasing or decreasing the charging amount as necessary.
上記白金族金属含有原料と共に装入されるコレクターメタルとしては、銀メタル又は銅メタルが用いられる。これらのコレクターメタルを用いることで、白金族金属含有原料から白金族金属元素をメタル熔湯中に移行させて熔融メタル中において濃縮することができる。但し、共存させるコレクターメタルの量が多すぎると白金族の品位が低下しすぎるので、白金族金属含有原料１００質量部に対してコレクターメタルを１０質量部以下になるように可能な限り少量添加するのが好ましい。 As the collector metal charged with the platinum group metal-containing raw material, silver metal or copper metal is used. By using these collector metals, the platinum group metal element can be transferred from the platinum group metal-containing raw material into the metal melt and concentrated in the molten metal. However, if the amount of collector metal to be coexisting is too large, the quality of the platinum group will be too low, so the collector metal is added as little as possible to 100 parts by mass or less with respect to 100 parts by mass of the platinum group metal-containing raw material. Is preferred.
電気炉に装入するこれら白金族金属含有原料とフラックス成分とは、ボールミル等で混合状態で粉状化した上でペレット化し、このペレットを乾燥してから電気炉に装入するのが好ましい。これにより、原材料が飛散してロスするのを防ぐことができる。また、白金族金属含有原料の均一かつ素早い処理が可能となり、ばらつきの少ない高品位の白金族金属を効率よく回収することができる。 The platinum group metal-containing raw material and the flux component charged into the electric furnace are preferably powdered in a mixed state with a ball mill or the like, pelletized, dried, and then charged into the electric furnace. Thereby, it can prevent that a raw material scatters and loses. In addition, the platinum group metal-containing raw material can be uniformly and quickly processed, and high-quality platinum group metals with little variation can be efficiently recovered.
上記の白金族金属含有原料、コレクターメタル、及びフラックスからなる原材料を電気炉に装入した後、溶融スラグ層と熔融メタル層とに相分離させると共に該原料中の白金族金属を熔融メタル層に移行させて熔融メタルに吸収させるため、ある程度の静置時間をかけて静置（セトリング）することが必要となる。尚、上記静置時間はバッチ式で処理する場合を想定したものであるが、連続式で処理する場合はこの静置時間は滞留時間とすることができる。 After the raw material comprising the platinum group metal-containing raw material, collector metal, and flux is charged into an electric furnace, it is phase-separated into a molten slag layer and a molten metal layer, and the platinum group metal in the raw material is converted into a molten metal layer. In order to make it transfer and make it melt | dissolve in a molten metal, it is necessary to leave still (settling) over a certain stationary time. In addition, although the said stationary time assumes the case where it processes by a batch type, when processing by a continuous type, this stationary time can be made into a residence time.
セトリング後は、電気炉の下層側から熔融メタルを抜き出して更に乾式銅製錬工程で処理するのが好ましい。これにより、当該乾式銅製錬工程に対して特に悪影響を及ぼすことなく、必要最小限の処理で白金族金属を精製することができる。具体的には、上記の白金族金属含有原料から移行した白金族金属を含んだ熔融メタルを電気炉の下層側から抜き出し、これを乾式銅製錬プラントの自溶炉から抜き出されるマットの処理が行われている転炉内に投入する。これにより、白金族金属含有原料中のＡｌ２Ｏ３、ＣｅＯ２、ＺｒＯ２等の高融点の化合物を乾式銅精錬工程に持込むことなく、銅製錬スラグの粘性を適正に維持しながら白金族金属を含む熔融メタルの処理を行うことができる。 After settling, it is preferable to extract the molten metal from the lower layer side of the electric furnace and further process it in a dry copper smelting process. Thereby, a platinum group metal can be refine | purified by the minimum required process, without having a bad influence in particular with respect to the said dry-type copper smelting process. Specifically, the molten metal containing platinum group metal transferred from the platinum group metal-containing raw material is extracted from the lower layer side of the electric furnace, and the mat is extracted from the flash furnace of the dry copper smelting plant. It is put into the converter that is being used. This allows platinum group metals to be maintained while maintaining the viscosity of copper smelting slag appropriately without bringing high melting point compounds such as Al 2 O 3 , CeO 2 and ZrO 2 in the platinum group metal-containing material into the dry copper refining process. The processing of the molten metal containing a metal can be performed.
尚、上記セトリング後に熔融スラグのみを抜き出し、主に熔融メタルからなる残余部分に白金族金属原料をフラックスと共に追加して再度熔融処理と静置を行ってもよい。このような熔融スラグのみの抜き出しと新たな原料及びフラックス成分の追加による処理を繰り返すことにより、熔融メタル中の白金族金属の濃縮度を高めてより高濃度にすることができる。尚、電気炉の上層側から抜き出される熔融スラグは、セメントやコンクリート等の原料として用いることができる。 Alternatively, only the molten slag may be extracted after the settling, and the platinum group metal raw material may be added together with the flux to the remaining portion mainly made of the molten metal, and the melting treatment and the standing may be performed again. By repeating such processing by extracting only the molten slag and adding new raw materials and flux components, the concentration of the platinum group metal in the molten metal can be increased and the concentration can be increased. In addition, the molten slag extracted from the upper layer side of an electric furnace can be used as raw materials, such as cement and concrete.
上記の転炉で処理された白金族金属を含む粗銅は、鋳造機でアノードに成形された後、銅電解槽で電解処理される。これによりコレクターメタルは電解メタルとして回収することができ、白金族金属は陽極泥スライムとして高品位化させて回収することができる。なお、コレクターメタルにＡｇを用いる場合は、Ａｇを陰極側に電着させ、Ｐｔを陽極泥スライムとして回収することができる。回収した上記の電解メタルは、コレクターメタルとして再利用してもよい。 Crude copper containing a platinum group metal treated in the above converter is formed into an anode by a casting machine and then electrolytically treated in a copper electrolytic cell. Thus, the collector metal can be recovered as an electrolytic metal, and the platinum group metal can be recovered as an anode mud slime with high quality. In addition, when using Ag for a collector metal, Ag can be electrodeposited to the cathode side and Pt can be collect | recovered as anode mud slime. The recovered electrolytic metal may be reused as a collector metal.
［実施例１］
Ａｌ２Ｏ３品位６３.８％、Ｐｔ品位０.１５％の廃触媒１.００ｋｇを粉状にし、これにフラックスとして粉状ＣａＯ：０.７１ｋｇ、及び粉状ＳｉＯ２：０.１ｋｇを混合してペレット化した。このペレット状原料を乾燥した後、坩堝内の熔融したコレクターメタルＣｕ：２.００ｋｇに投入して熔解させた。全てが熔解したのを確認した後、更に熔融温度１５００℃で１時間保持した。１時間経過後、坩堝を傾けて上層側の熔融スラグのみを極力抜き出し、ほぼ熔融メタルからなる残余部分を別の鋳型へ抜き出した。
[Example 1]
Waste catalyst 1.00 kg of Al 2 O 3 grade 63.8% and Pt grade 0.15% is powdered, and powder CaO: 0.71 kg and powdered SiO 2 : 0.1 kg are mixed with this. And pelletized. After drying this pellet-shaped raw material, the molten collector metal Cu in the crucible: 2.00 kg was charged and melted. After confirming that all had melted, it was further held at a melting temperature of 1500 ° C. for 1 hour. After 1 hour, the crucible was tilted, and only the upper-layer side molten slag was extracted as much as possible, and the remaining portion made of almost molten metal was extracted into another mold.
得られた熔融スラグと熔融メタルをそれぞれサンプリングし、高周波誘導結合プラズマ（ＩＣＰ）発光分光分析装置を用いて組成を分析した。その分析結果を下記表１（熔融メタルの組成）及び下記表２（熔融スラグの組成）に示す。更に、熔融メタル及び溶融スラグの各々のＰｔ含有率からＰｔの分配率を算出した。その結果を下記表３に示す。 The obtained molten slag and molten metal were sampled, and the composition was analyzed using a high frequency inductively coupled plasma (ICP) emission spectroscopic analyzer. The analysis results are shown in Table 1 (composition of molten metal) and Table 2 (composition of molten slag). Furthermore, the Pt distribution ratio was calculated from the Pt contents of each of the molten metal and the molten slag. The results are shown in Table 3 below.
［実施例２］
Ａｌ２Ｏ３品位６３.８％、Ｐｔ品位０.１５％の廃触媒３２.００ｋｇを粉状にし、これにフラックスとして粉状ＣａＯ：２２.７５ｋｇ、及び粉状ＳｉＯ２：３.２５ｋｇを混合してペレット化した。このペレット状原料を乾燥した後、坩堝にコレクターメタルＣｕ：２.００ｋｇと装入可能な限りのペレット状原料とを投入して熔解させた。全てが熔解したのを確認後、更に熔解温度１５００℃で１時間保持した。１時間経過後、坩堝を傾けてした下層側の熔融メタルが排出されないように注意しながら上層側の熔融スラグのみを抜き出した。
[Example 2]
Waste catalyst 32.00 kg of Al 2 O 3 grade 63.8% and Pt grade 0.15% is powdered and mixed with powdered CaO: 22.75 kg and powdered SiO 2 : 3.25 kg. And pelletized. After drying this pellet raw material, 2.00 kg of collector metal Cu and as much pellet raw material as possible were charged into a crucible and melted. After confirming that all had melted, it was further held at a melting temperature of 1500 ° C. for 1 hour. After 1 hour, only the molten slag on the upper layer side was extracted while taking care not to discharge the molten metal on the lower layer side that was tilted by the crucible.
坩堝の傾きを元に戻した後、空いた部分に上記ペレット状原料を再び投入し、熔融したのを確認してから更に１時間保持した後、再度坩堝を傾けて上層側の熔融スラグのみを抜き出した。上記のペレット状原料の投入から熔融スラグの抜き出しまでの操作をペレット状原料がなくなるまで繰返した。そして最終バッチでは１時間保持後に熔融スラグのみを極力排出した後、残った熔融メタルを別の鋳型に抜き出して回収した。 After returning the tilt of the crucible to the original state, the pellet-shaped raw material was again charged into the empty portion, and after confirming that it was melted, the crucible was tilted again, and only the upper molten slag was removed. Extracted. The above operations from the feeding of the pellet-shaped raw material to the extraction of the molten slag were repeated until the pellet-shaped raw material ran out. In the final batch, after holding for 1 hour, only the molten slag was discharged as much as possible, and the remaining molten metal was extracted into another mold and collected.
得られた全ての熔融スラグと熔融メタルをそれぞれサンプリングして上記実施例１と同様に分析し、Ｐｔ分配率を算出した。熔融メタルの組成を下記表４に、熔融スラグの組成を下記表５に、Ｐｔ分配率を下記表６に示す。 All of the obtained molten slag and molten metal were sampled and analyzed in the same manner as in Example 1 to calculate the Pt distribution rate. The composition of the molten metal is shown in Table 4 below, the composition of the molten slag is shown in Table 5 below, and the Pt distribution rate is shown in Table 6 below.
上記表３と表６を比較して分かるように、実施例１では銅メタル中へのＰｔ分配率が９５.０％であるのに対して、実施例２では銅メタル中へのＰｔ分配率が９５.５％となっており、より濃度が高くなっている。
As can be seen by comparing Table 3 and Table 6 above, in Example 1, the Pt distribution rate into the copper metal was 95.0%, whereas in Example 2, the Pt distribution rate into the copper metal was Is 95.5%, and the concentration is higher.
Claims (6)
The platinum group metal-containing raw material and the flux component are charged by mixing a pulverized platinum group metal-containing raw material and a powdery flux component into a pellet, drying it, and then charging the electric furnace. The method for recovering a platinum group metal according to any one of claims 1 to 5, wherein:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017042068A JP2018145479A (en) | 2017-03-06 | 2017-03-06 | Recovery method of platinum group metals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017042068A JP2018145479A (en) | 2017-03-06 | 2017-03-06 | Recovery method of platinum group metals |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2018145479A true JP2018145479A (en) | 2018-09-20 |
Family
ID=63589643
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2017042068A Pending JP2018145479A (en) | 2017-03-06 | 2017-03-06 | Recovery method of platinum group metals |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2018145479A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10472700B1 (en) | 2019-04-29 | 2019-11-12 | Techemet, LP | Converting process with partial pre-oxidation of PGM collector alloy |
| CN110760883A (en) * | 2019-11-08 | 2020-02-07 | 陈雨 | A silver electrolytic acid mist collecting and processing device |
| CN113737013A (en) * | 2021-08-25 | 2021-12-03 | 中南大学 | Method for low-temperature trapping and recovering platinum group metal in waste catalyst |
| US20220154306A1 (en) * | 2019-03-26 | 2022-05-19 | Heraeus Deutschland GmbH & Co. KG | Method for producing a pgm collector alloy |
| CN115135783A (en) * | 2020-02-18 | 2022-09-30 | 贺利氏德国有限两合公司 | Method for making current collector alloys or pure silver containing precious metals |
| CN115491492A (en) * | 2022-08-23 | 2022-12-20 | 珠海格力绿色再生资源有限公司 | Method for combined treatment of waste automobile exhaust catalyst and waste silver-copper welding rod |
| EP4124666A1 (en) * | 2021-07-29 | 2023-02-01 | Dowa Metals & Mining Co., Ltd. | Method for recovering platinum group metals |
-
2017
- 2017-03-06 JP JP2017042068A patent/JP2018145479A/en active Pending
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220154306A1 (en) * | 2019-03-26 | 2022-05-19 | Heraeus Deutschland GmbH & Co. KG | Method for producing a pgm collector alloy |
| US12060624B2 (en) * | 2019-03-26 | 2024-08-13 | Heraeus Deutschland GmbH & Co. KG | Method for producing a PGM collector alloy |
| US10501823B2 (en) | 2019-04-29 | 2019-12-10 | Techemet, LP | Converting process with slag separation and recycle |
| US10513750B2 (en) | 2019-04-29 | 2019-12-24 | Techemet, LP | PGM converting process with staged slagging |
| US10513751B2 (en) | 2019-04-29 | 2019-12-24 | Techemet, LP | Integrated PGM converting process |
| US12270090B2 (en) | 2019-04-29 | 2025-04-08 | Techemet, LP | PGM converting process and jacketed rotary converter |
| US10648059B2 (en) | 2019-04-29 | 2020-05-12 | Techemet, LP | Jacketed rotary converter and PGM converting process |
| US10472700B1 (en) | 2019-04-29 | 2019-11-12 | Techemet, LP | Converting process with partial pre-oxidation of PGM collector alloy |
| CN110760883B (en) * | 2019-11-08 | 2020-12-04 | 王微静 | A silver electrolytic acid mist collecting and processing device |
| CN110760883A (en) * | 2019-11-08 | 2020-02-07 | 陈雨 | A silver electrolytic acid mist collecting and processing device |
| CN115135783A (en) * | 2020-02-18 | 2022-09-30 | 贺利氏德国有限两合公司 | Method for making current collector alloys or pure silver containing precious metals |
| EP4124666A1 (en) * | 2021-07-29 | 2023-02-01 | Dowa Metals & Mining Co., Ltd. | Method for recovering platinum group metals |
| CN113737013A (en) * | 2021-08-25 | 2021-12-03 | 中南大学 | Method for low-temperature trapping and recovering platinum group metal in waste catalyst |
| CN115491492A (en) * | 2022-08-23 | 2022-12-20 | 珠海格力绿色再生资源有限公司 | Method for combined treatment of waste automobile exhaust catalyst and waste silver-copper welding rod |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2018145479A (en) | Recovery method of platinum group metals | |
| KR101782234B1 (en) | Processing method of electric and electronic parts scraps | |
| CN101827951B (en) | Recovery of residues containing copper and other precious metals | |
| CN104263965B (en) | The method that gold and lead are reclaimed in difficult-treating gold mine collocation lead containing sludge raw material oxygen enriched molten bath melting | |
| US20110001279A1 (en) | Apparatus for recovering platinum group elements | |
| CN101903543B (en) | Method for refining copper concentrate | |
| JP5074332B2 (en) | Platinum group element recovery equipment | |
| CN106222421A (en) | Gold mud treatment method | |
| JP2008081799A (en) | Method for recovering lead | |
| JP2019527769A (en) | Concentrating and recovering precious metals | |
| JP5355977B2 (en) | Method for treating materials containing platinum group elements, rhenium and arsenic | |
| JP2013209732A (en) | Method for recovering nickel | |
| JP4949343B2 (en) | Copper smelting method | |
| CN107083486B (en) | Comprehensive disposal and utilization method of precious metal-containing smelting waste residue | |
| JP4505843B2 (en) | Copper dry refining method | |
| JP2012082505A (en) | Method for treating converter slag and method for smelting copper | |
| JP4284124B2 (en) | Methods for recovering platinum group elements | |
| JP7710915B2 (en) | Methods for recovering platinum group elements | |
| JP2020132957A (en) | Silver recovery method | |
| JPH101727A (en) | Copper electrolytic slime treatment method | |
| JP4355334B2 (en) | Operation method of copper smelting | |
| JP2013234356A (en) | Pyrometallurgy process for lead using high impurity-containing lead slag as raw material | |
| JP4274069B2 (en) | Reuse method of copper alloy and mat obtained by slag fuming method | |
| KR102815789B1 (en) | Method for recovering copper and precious metals from e-waste | |
| WO2005068669A1 (en) | Method of slag fuming |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20170328 |