JPH09324224A - Method of recovery of platinum group element - Google Patents

Method of recovery of platinum group element

Info

Publication number
JPH09324224A
JPH09324224A JP14411696A JP14411696A JPH09324224A JP H09324224 A JPH09324224 A JP H09324224A JP 14411696 A JP14411696 A JP 14411696A JP 14411696 A JP14411696 A JP 14411696A JP H09324224 A JPH09324224 A JP H09324224A
Authority
JP
Japan
Prior art keywords
platinum group
alloy
group elements
cooling rate
reducing agent
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.)
Granted
Application number
JP14411696A
Other languages
Japanese (ja)
Other versions
JP3591134B2 (en
Inventor
Kenya Itou
研哉 伊藤
Kazuaki Kawanaka
一哲 川中
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sumitomo Metal Mining Co Ltd
Original Assignee
Sumitomo Metal Mining Co Ltd
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Filing date
Publication date
Application filed by Sumitomo Metal Mining Co Ltd filed Critical Sumitomo Metal Mining Co Ltd
Priority to JP14411696A priority Critical patent/JP3591134B2/en
Publication of JPH09324224A publication Critical patent/JPH09324224A/en
Application granted granted Critical
Publication of JP3591134B2 publication Critical patent/JP3591134B2/en
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Expired - Fee Related legal-status Critical Current

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Abstract

PROBLEM TO BE SOLVED: To provide a technique of recovery of respective platinum group elements from an alloy containing platinum group elements with high efficiency by reducing a material containing the oxides and sulfides of platinum group elements and providing the resultant alloy, containing platinum group elements, with high crushability. SOLUTION: A reducing agent and Fe3 P are added to a material containing at least either of the oxides and sulfides of platinum group elements, which is melted in an inert atmosphere of argon, nitrogen, etc., at 800-1200 deg.C reduction temp. and 1450-1650 deg.C melting temp. Subsequently, cooling is carried out while regulating the average cooling rate, until 300 deg.C is reached, to >=1 deg.C/sec, and the resultant alloy, containing platinum group elements, is crushed to <=75μm. The resultant alloy powder is leached with hydrochloric acid and chlorine gas, and the platinum group elements are recovered in a leach liquor.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【発明の属する技術分野】本発明は白金族酸化物や白金
族硫化物を含有する物質から白金族元素を回収する方法
に関する。
TECHNICAL FIELD The present invention relates to a method of recovering a platinum group element from a substance containing a platinum group oxide or a platinum group sulfide.

【0002】[0002]

【従来の技術】白金族酸化物および白金族硫化物を含有
するような物質から白金族元素を回収する場合、白金族
の酸化物はそのまま湿式法で浸出することが難しい。こ
のため白金族酸化物を一度還元する必要がある。乾式法
でこれをそのまま還元熔解して含白金族合金を得ると、
この合金の粉砕性は極めて悪い。粉砕性が悪い合金だと
粉砕した合金より白金族を浸出する湿式工程での浸出率
が低い上、浸出に時間がかかるなどの問題を生じること
になる。
2. Description of the Related Art When recovering a platinum group element from a substance containing a platinum group oxide and a platinum group sulfide, it is difficult to leach the platinum group oxide as it is by a wet method. Therefore, it is necessary to reduce the platinum group oxide once. When this is directly reduced and melted by a dry method to obtain a platinum group alloy,
The grindability of this alloy is extremely poor. If the alloy has poor pulverizability, the leaching rate in the wet process of leaching the platinum group is lower than that of the pulverized alloy, and further leaching takes a long time.

【0003】このため、白金族系触媒などから白金族を
回収場合には、これらを銅、鉄などの金属と共に還元熔
解し、白金族含有合金を生成させ、得た合金を溶解し、
得た溶解液より回収する。この方法では、粉砕性は改善
されるものの未だ悪く、かつ、回収対象となる微量の白
金族元素に対して相対的に多量の銅や鉄を添加するた
め、湿式工程で溶解の対象となる物量が多くなり、結果
的に白金族の実収率が低くなり経済的に不利となる。
Therefore, when recovering the platinum group from a platinum group catalyst or the like, these are reduced and melted with a metal such as copper or iron to form a platinum group-containing alloy, and the obtained alloy is melted,
Recover from the resulting lysate. In this method, although the pulverizability is improved, it is still poor, and since a relatively large amount of copper or iron is added to the trace amount of platinum group element to be recovered, the amount of material to be dissolved in the wet process As a result, the actual yield of platinum group becomes low, which is economically disadvantageous.

【0004】また、白金族を上記と同様に合金とするも
のの、得られた合金を酸化浸出あるいは電気的に陽極酸
化して溶解し、一旦、白金族を残渣あるいはスライムと
して濃縮し、このスライムを処理して回収する方法も知
られている。この方法では、合金を陽極酸化する場合、
通電できる電流に限界があるため、その処理速度が遅
く、大きな設備が必要とされる。加えて、回収までに長
時間が必要とされるため、高価な白金族の多量の仕掛か
りを持つことが強いられる。よってこの方法も経済的に
有利な方法とは言えない。
Although the platinum group is alloyed in the same manner as above, the obtained alloy is dissolved by oxidative leaching or electrical anodic oxidation, and the platinum group is once concentrated as a residue or slime. A method of processing and collecting is also known. In this method, when anodizing an alloy,
Since the current that can be passed is limited, the processing speed is slow and large equipment is required. In addition, since it takes a long time to recover, it is forced to have a large amount of expensive platinum group metalwork. Therefore, this method is not economically advantageous.

【0005】[0005]

【発明が解決しようとする課題】本発明は上記状況に鑑
みなされたものであり、白金族の酸化物および硫化物を
含有する物質を還元して得た白金族含有合金に、高い粉
砕性を持たすことによって白金族含有合金より効率よく
各白金族元素を回収する技術の提供を課題とする。
The present invention has been made in view of the above situation, and a platinum group-containing alloy obtained by reducing a substance containing a platinum group oxide and a sulfide has high pulverizability. An object of the present invention is to provide a technique for recovering each platinum group element more efficiently than an alloy containing a platinum group.

【0006】[0006]

【課題を解決するための手段】上記課題を解決する本発
明の方法は、白金族の酸化物および硫化物を含有する物
質に還元剤とFe3Pとを添加後アルゴン、窒素などの
不活性雰囲気中において、還元温度を800℃〜120
0℃、熔解温度を1450℃〜1650℃として溶解
し、次いで300℃までの平均冷却速度を1℃/秒以上
の冷却速度で冷却して得られる白金族含有合金を75ミ
クロン以下に粉砕し合金粉とする。そして得られた合金
粉末を塩酸と塩素ガスで浸出し、浸出液中に白金族元素
を回収するものである。
According to the method of the present invention for solving the above problems, a reducing agent and Fe 3 P are added to a substance containing an oxide and a sulfide of the platinum group, and then an inert gas such as argon or nitrogen is added. In the atmosphere, the reduction temperature is set to 800 ° C to 120 ° C.
Platinum group-containing alloy obtained by melting at 0 ° C., melting temperature of 1450 ° C. to 1650 ° C., and then cooling at an average cooling rate of up to 300 ° C. at a cooling rate of 1 ° C./second or more is pulverized to 75 μm or less and alloyed. Use as powder. Then, the obtained alloy powder is leached with hydrochloric acid and chlorine gas to recover the platinum group element in the leachate.

【0007】[0007]

【発明の実施の形態】湿式処理工程において塩酸と塩素
ガスによる浸出を行う際、合金粉の粒度が浸出速度と浸
出率に大きく影響する。よって、白金族含有合金の粉砕
性が極めて重要となる。
BEST MODE FOR CARRYING OUT THE INVENTION When leaching with hydrochloric acid and chlorine gas in a wet treatment process, the particle size of alloy powder has a great influence on the leaching rate and the leaching rate. Therefore, the pulverizability of the platinum group-containing alloy is extremely important.

【0008】本発明者らは種々の検討を重ねた結果、急
冷することにより合金粒子の成長を抑え、合金の粉砕性
を向上でき、かつPの含まれる合金の粉砕性が高いこと
に注目して白金族合金中のPの濃度を調整することによ
り粉砕性を向上できることを見いだした。
As a result of various investigations, the present inventors have noticed that rapid cooling suppresses the growth of alloy particles, improves the pulverizability of the alloy, and the pulverizability of the alloy containing P is high. It was found that the pulverizability can be improved by adjusting the P concentration in the platinum group alloy.

【0009】本発明の方法において、合金中のPの品位
は1〜20wt%とすることが好ましく、5〜10%が
特に望ましい。
In the method of the present invention, the grade of P in the alloy is preferably 1 to 20% by weight, and more preferably 5 to 10%.

【0010】合金中のP源としては特にこだわらない
が、Fe3Pがもっとも取り扱いやすく簡便で確実であ
る。
The source of P in the alloy is not particularly limited, but Fe 3 P is the easiest to handle, simple, and reliable.

【0011】以下実施例と比較例とを用いて本発明の方
法を説明する。
The method of the present invention will be described below with reference to examples and comparative examples.

【0012】なお、本発明の方法において添加する還元
剤は炭素を含むものであり、炭素量が原料中の酸素量に
対してモル比でC:O=1:2以上とすることが好まし
い。
The reducing agent added in the method of the present invention contains carbon, and it is preferable that the amount of carbon be C: O = 1: 2 or more in molar ratio with respect to the amount of oxygen in the raw material.

【0013】[0013]

【実施例】【Example】

(実施例1)白金族元素としてPtを8.0%、Pdを
6.4%、Rhを5.2%、Irを3.7%、Osを
0.4%、Ruを7.4%、Auを0.73%、その他
の元素としてFeを19.3%、Cuを8.06%、N
iを5.31%、Sを5.42%他を含む酸化物および
硫化物を含有する白金属系触媒残渣100gと還元剤の
コークス21.6g、更にP品位が15.6wt%のF
3Pを66.7gをアルミナルツボに入れ、Ar中で
900℃まで昇温し1時間900℃に保持して還元熔解
した。
(Example 1) Pt as a platinum group element is 8.0%, Pd is 6.4%, Rh is 5.2%, Ir is 3.7%, Os is 0.4%, and Ru is 7.4%. , Au of 0.73%, other elements of Fe of 19.3%, Cu of 8.06%, N
100 g of a white metal catalyst residue containing oxides and sulfides containing 5.31% of i, 5.32% of S, and the like, 21.6 g of coke as a reducing agent, and F having a P quality of 15.6 wt%.
66.7 g of e 3 P was placed in an alumina crucible, heated to 900 ° C. in Ar and kept at 900 ° C. for 1 hour for reduction melting.

【0014】その後温度を1550℃に上げて1550
℃で2時間保持して還元メタルを完全に溶解し、セトリ
ングした後、炉からアルミナルツボを取り出して大気中
で急冷した。この際、1550℃から300℃までの平
均冷却速度は1.2℃/秒となっていた。
Thereafter, the temperature is raised to 1550 ° C. and 1550
The reduced metal was completely melted by holding at 2 ° C. for 2 hours, settled, and then the alumina crucible was taken out from the furnace and rapidly cooled in the atmosphere. At this time, the average cooling rate from 1550 ° C to 300 ° C was 1.2 ° C / sec.

【0015】得られたメタルとカスは158.5g(合
金中のP品位7.1%)であった。このメタルとカスを
EPMAで観察した結果、白金族の酸化物は全く見られ
ず、メタル中の組織にはPと各白金族が観察されその組
織は微細化していた。
The obtained metal and dust were 158.5 g (P grade in the alloy: 7.1%). As a result of observing this metal and dust with EPMA, no platinum group oxide was observed, and P and each platinum group were observed in the structure in the metal, and the structure was refined.

【0016】これらのメタルとカスを振動ミル粉砕機で
60秒間粉砕し、目開き75ミクロンの篩を使って篩別
したところ、篩上に残ったサンプルは存在せず全量75
ミクロン以下に粉砕する事ができた。この75ミクロン
以下の粉砕物を塩酸濃度5N、スラリー濃度400g/
リットル、液温90℃で塩素ガスを吹き込んで浸出を行
い、ORPが最大値まで上昇させた後、HNO3を2%
添加し6時間保持した。次いでスラリーを濾過して濾液
(浸出液A)、洗浄液(洗液B)、再び残った残渣(洗
浄残渣C)を得た。それぞれの液中と残渣の分析値から
各メタルの浸出率を、 浸出率=(A+B)×100/(A+B+C) の式で表すと、Ptが99.8%、Pdが99.9%、
Rhが99.5%、Irが99.1%、Ruが99.4
%、Auが98.5%で高い浸出率が得られた。
[0016] These metals and debris were crushed for 60 seconds by a vibration mill crusher, and sieved using a sieve having a mesh size of 75 microns. No sample remained on the sieve and the total amount was 75
It was possible to crush it to less than a micron. The pulverized product having a particle size of 75 microns or less is hydrochloric acid concentration 5N, slurry concentration 400 g /
After leaching by blowing chlorine gas at a liquid temperature of 90 ° C. in a liter and increasing the ORP to the maximum value, 2% of HNO 3 was added.
Added and held for 6 hours. Then, the slurry was filtered to obtain a filtrate (leaching solution A), a washing solution (washing solution B), and a residual residue (washing residue C) again. The leaching rate of each metal from the analysis value of each liquid and the residue is expressed by the formula of leaching rate = (A + B) × 100 / (A + B + C), Pt is 99.8%, Pd is 99.9%,
Rh is 99.5%, Ir is 99.1%, and Ru is 99.4.
%, Au was 98.5%, and a high leaching rate was obtained.

【0017】(実施例2)1550℃の熔体を水クエン
チした以外は実施例1と同様にしてメタルとカスとを得
た。
(Example 2) Metals and scraps were obtained in the same manner as in Example 1 except that the melt at 1550 ° C was quenched with water.

【0018】得られたメタルとカスの合計量は159.
0gであった。このメタルとカスをEPMAで観察した
結果、いずれにも白金族の酸化物は全く見られず、メタ
ルの組織は微細化していた。
The total amount of the obtained metal and dust was 159.
It was 0 g. As a result of observing the metal and the dust with EPMA, no platinum group oxide was found in any of them and the metal structure was refined.

【0019】これらのメタルとカスとを共に振動ミル粉
砕機で60秒間粉砕し、目開き75ミクロンの篩を使っ
て篩別したところ、篩上に残ったメタルは存在せず全量
75ミクロン以下に粉砕する事ができた。
Both the metal and the dust were crushed for 60 seconds by a vibrating mill and sieving was performed using a sieve having an opening of 75 microns, and there was no metal left on the sieve, and the total amount was 75 microns or less. I was able to crush it.

【0020】この75ミクロン以下の粉砕物を実施例1
と同様に処理して濾液、洗浄液、残渣を得た。そして、
実施例1と同様に貴金属を分析し得た分析値から各メタ
ルの浸出率を求めた。その結果、Ptでは99.5%、
Pdでは99.6%、Rhでは99.1%、Irでは9
8.7%、Ruでは98.6%、Auでは98.0%と
いう高い浸出率を得ることができた。
The pulverized product having a particle size of 75 microns or less was used in Example 1.
The same treatment as described above was carried out to obtain a filtrate, a washing solution and a residue. And
The noble metal was analyzed in the same manner as in Example 1, and the leaching rate of each metal was obtained from the analysis value obtained. As a result, Pt is 99.5%,
99.6% for Pd, 99.1% for Rh, 9 for Ir
High leaching rates of 8.7%, 98.6% for Ru, and 98.0% for Au could be obtained.

【0021】(実施例3)1550℃から300℃まで
の平均冷却速度を1℃/秒とした以外は実施例2と同様
にしてメタルとカスとを得、これを粉砕し、実施例2と
同様にして浸出率を求めた。その結果、実施例1と同様
の浸出率が得られた。
Example 3 A metal and a scrap were obtained in the same manner as in Example 2 except that the average cooling rate from 1550 ° C. to 300 ° C. was set to 1 ° C./sec. Similarly, the leaching rate was obtained. As a result, the same leaching rate as in Example 1 was obtained.

【0022】なお、60秒間の振動ミルの粉砕で全量7
5ミクロン以下に粉砕する事ができた。
It should be noted that the total amount of 7 by crushing with a vibration mill for 60 seconds.
It could be crushed to less than 5 microns.

【0023】(実施例4)合金中のP品位が1.0%と
なるように15.6wt%のFe3Pの添加量を5.5
gとした以外は実施例1と同様にしてメタルとカスとを
得、これを粉砕し、実施例1と同様にして浸出率を求め
た。その結果、いずれの場合も実施例1と同様の浸出率
が得られた。
(Example 4) The amount of Fe 3 P added at 15.6 wt% was adjusted to 5.5 so that the P quality in the alloy would be 1.0%.
A metal and a residue were obtained in the same manner as in Example 1 except that the value was g, and this was crushed, and the leaching rate was obtained in the same manner as in Example 1. As a result, in each case, the same leaching rate as in Example 1 was obtained.

【0024】なお、60秒間の振動ミルの粉砕で全量7
5ミクロン以下に粉砕する事ができた。
It should be noted that the total amount of 7 by crushing with a vibration mill for 60 seconds.
It could be crushed to less than 5 microns.

【0025】(実施例5)合金中のP品位が20wt%
となるようにPを添加した以外は実施例1と同様にして
メタルとカスとを得、これを粉砕し、実施例1と同様に
して浸出率を求めた。その結果、いずれの場合も実施例
1と同様の浸出率が得られた。
(Example 5) P grade in the alloy is 20 wt%
A metal and a residue were obtained in the same manner as in Example 1 except that P was added so that the leaching rate was obtained in the same manner as in Example 1. As a result, in each case, the same leaching rate as in Example 1 was obtained.

【0026】なお、60秒間の振動ミルの粉砕で全量7
5ミクロン以下に粉砕する事ができた。
It should be noted that the total amount of 7 by crushing with a vibration mill for 60 seconds.
It could be crushed to less than 5 microns.

【0027】(比較例1)1550℃で2時間保持した
後炉内で冷却した以外は実施例1と同様にしてメタルと
カスとを得た。得られたメタルとカスは158.7gで
あった。このメタルとカスをEPMAで観察した結果、
白金族の酸化物は全く見られなかったが、メタルの組織
は粗大化していた。なお、1550℃から300℃まで
の平均冷却速度は0.4℃/秒であった。
(Comparative Example 1) A metal and a scrap were obtained in the same manner as in Example 1 except that the material was kept at 1550 ° C for 2 hours and then cooled in the furnace. The obtained metal and dust were 158.7 g. As a result of observing this metal and dust with EPMA,
No platinum group oxide was found, but the metal structure was coarse. The average cooling rate from 1550 ° C to 300 ° C was 0.4 ° C / sec.

【0028】これらのメタルとカスを振動ミル粉砕機で
粉砕を行ったが、このメタルは切削も粉砕も困難な極め
て硬い合金であり、浸出試験を行うことができなかっ
た。
These metals and scraps were crushed by a vibration mill crusher, but this metal was an extremely hard alloy that was difficult to cut and crush, and a leaching test could not be performed.

【0029】(比較例2)粉砕性を向上させる方法とし
てマット化による試験を実施した。白金族元素としてP
tを8.0%、Pdを6.4%、Rhを5.2%、Ir
を3.7%、Osを0.4%、Ruを7.4%、Auを
0.73%、その他の元素としてFeを19.3%、C
uを8.06%、Niを5.31%、Sを5.42%他
を含む酸化物および硫化物を含有する残渣150gをア
ルミナルツボに入れ、Ar中で1200℃まで昇温し還
元剤のコークスを32.5g添加して白金族酸化物の還
元を1時間行った後、マット化のために硫黄80gを3
回に分けて添加した。硫黄添加後2時間保持した後に炉
内で冷却した。得られたマットは143.7g、カスが
18.3gであった。
(Comparative Example 2) A test by matting was carried out as a method for improving the pulverizability. P as a platinum group element
t is 8.0%, Pd is 6.4%, Rh is 5.2%, Ir
Is 3.7%, Os is 0.4%, Ru is 7.4%, Au is 0.73%, and Fe is 19.3% and C as other elements.
150 g of a residue containing oxides and sulfides containing 8.06% of u, 5.31% of Ni, 5.42% of S, etc. was placed in an alumina crucible and heated to 1200 ° C. in Ar to reduce the agent. After 32.5 g of coke was added to reduce the platinum group oxide for 1 hour, 80 g of sulfur was added to the mixture for 3 hours for matting.
It was added in portions. After the addition of sulfur, it was held for 2 hours and then cooled in the furnace. The obtained mat had a weight of 143.7 g and a residue of 18.3 g.

【0030】これらのメタルとカスを振動ミル粉砕機で
60秒間粉砕し、目開き75ミクロンの篩を使って篩別
したところ、篩を通過したサンプルは159.4gで9
8.4%が75ミクロン以下に粉砕できた。この75ミ
クロン以下の粉砕物を塩酸濃度5N、スラリー濃度40
0g/リットル、液温90℃で塩素ガスを吹き込んで浸
出を行い、ORPが最大値まで上昇後HNO3を2%添
加し6時間保持した。この浸出液を濾過し濾液(浸出液
A)、残渣を水洗して得られた洗浄液(洗液B)、再び
残った残渣(洗浄残渣C)とした。それぞれの液中と残
渣の分析値から各メタルの浸出率を、 浸出率=(A+B)×100/(A+B+C) の式で表すと、Ptが92.8%、Pdが99.3%、
Rhが98.4%、Irが53.3%、Ruが59.8
%、Auが95.0%でIr、Ruの浸出率が悪かっ
た。
These metals and debris were crushed by a vibration mill crusher for 60 seconds and sieved using a sieve having a mesh size of 75 microns. The sample that passed through the sieve was 159.4 g and was 9
8.4% could be ground to less than 75 microns. This pulverized product of 75 microns or less is added with hydrochloric acid concentration of 5N and slurry concentration of 40
Chlorine gas was blown in at a liquid temperature of 90 ° C. at 0 g / liter to perform leaching. After the ORP increased to the maximum value, 2% of HNO 3 was added and the mixture was kept for 6 hours. The leaching solution was filtered to obtain a filtrate (leaching solution A), a washing solution obtained by washing the residue with water (washing solution B), and a residue remaining again (washing residue C). The leaching rate of each metal from the analysis values of each liquid and residue is expressed by the formula of leaching rate = (A + B) × 100 / (A + B + C), Pt is 92.8%, Pd is 99.3%,
Rh is 98.4%, Ir is 53.3%, and Ru is 59.8.
%, Au was 95.0%, and the leaching rate of Ir and Ru was poor.

【0031】[0031]

【発明の効果】本発明の方法によれば粉砕性に非常に優
れた白金族含有合金を得ることができる。このため白金
族回収工程の浸出が容易になり、湿式処理工程で高い浸
出率が得られる。
According to the method of the present invention, it is possible to obtain a platinum group-containing alloy having extremely excellent pulverizability. For this reason, leaching in the platinum group recovery step becomes easy, and a high leaching rate can be obtained in the wet treatment step.

Claims (5)

【特許請求の範囲】[Claims] 【請求項1】 白金族酸化物、白金族硫化物の少なく
とも一方を含有する物質と還元剤とを混合し、還元熔解
して合金を得、該合金を粉砕して合金粉末を得、該合金
メタル粉末を湿式処理にて白金族元素を回収する方法に
おいて、還元剤とFe3Pとを添加した後還元溶解後に
急冷して合金を得ることを特徴とする白金族元素回収方
法。
1. A substance containing at least one of a platinum group oxide and a platinum group sulfide and a reducing agent are mixed and reduced and melted to obtain an alloy, and the alloy is crushed to obtain an alloy powder. A method for recovering a platinum group element by wet-treating a metal powder, which comprises adding a reducing agent and Fe 3 P, reducing and dissolving, and then rapidly cooling to obtain an alloy.
【請求項2】 300℃までの平均冷却速度を1℃/
秒以上の冷却速度で冷却することを特徴とする請求項1
記載の方法。
2. The average cooling rate up to 300 ° C. is 1 ° C. /
The cooling is performed at a cooling rate of 2 seconds or more.
The described method.
【請求項3】 得られる合金中のP品位が1〜20重
量%であることを特徴とする請求項1または2記載の方
法。
3. The method according to claim 1, wherein the P grade in the obtained alloy is 1 to 20% by weight.
【請求項4】 白金族の酸化物および硫化物を含有す
る物質に還元剤を添加後アルゴン、窒素などの不活性雰
囲気中において、800℃〜1200℃で還元し、次い
で1450℃〜1650℃で完全に溶解し、次いで30
0℃までの平均冷却速度を1℃/秒以上の冷却速度で冷
却することを特徴とする請求項3記載の方法。
4. After adding a reducing agent to a substance containing a platinum group oxide and a sulfide, it is reduced at 800 ° C. to 1200 ° C. in an inert atmosphere such as argon or nitrogen, and then at 1450 ° C. to 1650 ° C. Completely dissolved, then 30
The method according to claim 3, wherein the average cooling rate up to 0 ° C is cooled at a cooling rate of 1 ° C / sec or more.
【請求項5】 白金族の酸化物および硫化物を含有す
る物質に還元剤とFe3Pを合金中のP品位が1〜20
重量%となるように添加後アルゴン、窒素などの不活性
雰囲気中において、800℃〜1200℃で還元し、次
いで1450℃〜1650℃で完全に溶解し、次いで3
00℃までの平均冷却速度を1℃/秒以上の冷却速度で
冷却して得られる白金族含有合金を75ミクロン以下に
粉砕し合金粉とし、得られた合金粉末を塩酸と塩素ガス
で浸出し、浸出液中に白金族元素を回収することを特徴
とする白金族元素の回収方法。
5. A substance containing a platinum group oxide and a sulfide and a reducing agent and Fe 3 P in an alloy having a P grade of 1 to 20.
After adding so as to make the weight%, reduction is performed at 800 ° C. to 1200 ° C. in an inert atmosphere such as argon and nitrogen, and then completely dissolved at 1450 ° C. to 1650 ° C., then 3
The platinum group-containing alloy obtained by cooling the average cooling rate up to 00 ° C at a cooling rate of 1 ° C / sec or more is crushed to 75 microns or less to obtain an alloy powder, and the obtained alloy powder is leached with hydrochloric acid and chlorine gas. A method for recovering a platinum group element, comprising recovering a platinum group element in the leachate.
JP14411696A 1996-06-06 1996-06-06 Recovery method of platinum group elements Expired - Fee Related JP3591134B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14411696A JP3591134B2 (en) 1996-06-06 1996-06-06 Recovery method of platinum group elements

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14411696A JP3591134B2 (en) 1996-06-06 1996-06-06 Recovery method of platinum group elements

Publications (2)

Publication Number Publication Date
JPH09324224A true JPH09324224A (en) 1997-12-16
JP3591134B2 JP3591134B2 (en) 2004-11-17

Family

ID=15354570

Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Link
JP (1) JP3591134B2 (en)

Also Published As

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