WO2012026649A1 - 휘수연광으로부터 페로몰리브덴의 제조방법 - Google Patents
휘수연광으로부터 페로몰리브덴의 제조방법 Download PDFInfo
- Publication number
- WO2012026649A1 WO2012026649A1 PCT/KR2010/007193 KR2010007193W WO2012026649A1 WO 2012026649 A1 WO2012026649 A1 WO 2012026649A1 KR 2010007193 W KR2010007193 W KR 2010007193W WO 2012026649 A1 WO2012026649 A1 WO 2012026649A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- molybdenum
- molybdenite
- copper
- ferro molybdenum
- aluminum
- Prior art date
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B5/00—General methods of reducing to metals
- C22B5/02—Dry methods smelting of sulfides or formation of mattes
- C22B5/04—Dry methods smelting of sulfides or formation of mattes by aluminium, other metals or silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B34/00—Obtaining refractory metals
- C22B34/30—Obtaining chromium, molybdenum or tungsten
- C22B34/34—Obtaining molybdenum
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C27/00—Alloys based on rhenium or a refractory metal not mentioned in groups C22C14/00 or C22C16/00
- C22C27/04—Alloys based on tungsten or molybdenum
Definitions
- the present invention relates to a method for producing ferro molybdenum having a copper content of 0.5% or less from a low grade volatile lead (Cu: 0.5 to 10 wt.%) Having a high copper content.
- Molybdenum is a relatively rare element that is not produced in a natural free state, and it is very suitable for the production of heat-resistant steel or alloy steel as an alloying element by improving the hot creep property of steel, preventing temper brittleness and increasing the corrosion resistance of steel. It is an important element.
- molybdenum is the primary raw material of economical molybdenum, relatively low concentration in the ore is usually only about 0.05 ⁇ 0.1% by weight, but is easily recovered and concentrated by flotation due to the characteristics of sulfide ore. Most of the available resources of molybdenum mines are limited to a few countries, such as China, the United States and Chile, most of which are derived from by-products of copper mines.
- the copper content in steelmaking feromolybdenum is usually limited to 0.5% or less.
- the recovery of molybdenum is inevitable because copper ore is also sulfide. Accordingly, some mines also produce and sell leaded ore concentrates with high copper content. Therefore, a high copper content is used for removing copper through an acid leaching process after oxidation or mixing with an ore having a low copper content.
- Ferro molybdenum refers to an alloy with iron having a molybdenum content of 50 to 75% by weight and is mainly used for the purpose of adding molybdenum in the steelmaking process.
- ferro molybdenum is prepared by a metal thermal reduction (Thermit) method in which molybdenum oxide (MoO 3 ), iron oxide, and a strong reducing agent are mixed and reacted.
- MoO 3 molybdenum oxide
- iron oxide iron oxide
- a strong reducing agent are mixed and reacted.
- aluminum takes away oxygen from molybdenum oxide or iron oxide and oxidizes, generating a lot of instantaneously, and the reaction temperature reaches a high temperature of 3000 ° C or higher.
- molybdenum oxide is produced by roasting molybdenite in air at 560 ⁇ 600 °C. If the copper content in the molten lead is high, the oxide is leached by filtration to remove copper. In this process, a large amount of molybdenum is also eluted and present in the leachate, and recovered through solvent extraction or pH adjustment. In the roasting process, a large amount of heat is generated by the combustion of molybdenum and sulfur. In other words, the molybdenum oxide has +4 valence and molybdenum has +6 valence. Therefore, more reducing agent than molybdenite is required for ferromolybdenum production from oxidized ore. In addition, the metal heat reduction process has a disadvantage in that the reaction is explosive and the reaction is completed in an instant, so that it is difficult to control the reaction and obtain a uniform product.
- the present invention is to solve the problems of the prior art as compared to the metal thermal reduction method of the prior art can reduce the amount of reducing agent by directly reducing the oxidation process, in particular ferro-ferro can be directly used as a raw material high copper content
- the purpose is to provide a method for producing molybdenum.
- the present invention provides a method for producing ferro molybdenum from molybdenite lead, wherein the production method produces ferro molybdenum directly without roasting the lead molten lead.
- the metal aluminum is added as a reducing agent to the lead molten lead in the heating furnace and reacted at a high temperature.
- the mixing weight ratio of adding iron and metal aluminum to the lead fluorite is preferably 60 to 70 wt% of the lead lead, 15 to 20 wt% of iron, and 10 to 20 wt% of metal aluminum. Outside of the mixed weight ratio, sulfur and impurities may not be smoothly removed, and copper distribution in the aluminum sulfide slag layer may be lowered.
- the reaction in b) is carried out for 10 to 30 minutes, it is preferable that the temperature of the heating apparatus including the furnace of the direct or indirect heating method is carried out at 1400 ⁇ 2000 °C. Outside this temperature, it is difficult to obtain the desired reaction product.
- the heating device is an induction heating method, and it is more preferable to use an indirect heating method by an induction coil outside the crucible using a high frequency generator, but is not limited thereto.
- the atmosphere in the heating device is preferably an argon gas atmosphere
- the argon gas flow rate from the outside of the heating device is adjusted according to the degree of airtightness of the device is preferably flowed enough to block the inflow of external air.
- the reaction can produce a ferro molybdenum having a copper content of less than 0.5% in the lower portion, the upper portion forms a slag layer containing aluminum sulfide (Al 2 S 3 ) as a main component and a small amount of iron sulfide (FeS).
- Al 2 S 3 aluminum sulfide
- FeS iron sulfide
- the reaction scheme may be represented as in the following formula (1).
- copper is mostly present in the slag layer having a high affinity with sulfur, and the distribution ratio depends on the reduction potential, that is, the amount of aluminum added.
- Table 1 shows the static heat of reaction, Gibbs free energy and the equilibrium equilibrium constant when reacting the molybdenite lead and the metal aluminum at 1100 to 2000 ° C.
- the concentration of molybdenum in the produced slag at equilibrium can be expected to be very low.
- the heat of reaction is not so large that the adiabatic reaction temperature should be applied externally for melting and phase separation of ferromolybdenum at about 1000 °C.
- the method for producing ferro-molybdenum according to the present invention can simplify the process by directly reducing the roasted lead fluoride without roasting the aluminum consumption can be reduced.
- ferro molybdenum can be produced from a copper containing high copper content without a separate copper removal process. Since the produced slag is aluminum sulfide, which has a higher energy level than the oxide, the heat of reaction is smaller than that of the metal thermal reduction method. Therefore, it is necessary to supplement heat through direct and indirect heating. Considering the energy of roasting, acid leaching, filtration, drying, etc. in the existing process, there is never much compared to the existing process, and the reaction can be controlled by controlling the output of the heating furnace, thereby realizing the uniformity of the product and continuous process This has a possible advantage.
- FIG. 1 shows a schematic diagram of a reduction apparatus according to the present invention.
- Figure 2 shows the XRD pattern of ferro molybdenum according to an embodiment of the present invention.
- thermocouple 2 induction coil
- Metallic iron and metal aluminum are mixed using a suitable mixing apparatus without any additional treatment of the powdered fluorite concentrate.
- the amount of aluminum added as a reducing agent is determined according to the content of the reducing target in the ore, that is, molybdenum, iron and copper, and iron is determined by estimating the molybdenum content in the ferro-molybdenum as the final product.
- Figure 1 is a schematic diagram of a reduction apparatus decorated on a laboratory scale for a specific implementation of the present invention, the heating device may be used in any manner of direct or indirect manner, but preferably induction heating.
- a high-frequency power supply was used with a power capacity of 50 KVA and a frequency of 7 kHz.
- An outer diameter of 13 cm and a height of 16 cm were used for a graphite crucible heating element.
- the apparatus according to the present invention When the apparatus according to the present invention is carried out at a large capacity used in industrial production, it is possible to produce the aluminum molten iron after forming the molten iron, without the need for a separate heating element.
- the mixed sample is placed in an alumina crucible, charged into a graphite crucible, and the lid is shut off to block air, followed by argon gas flow for a certain time to remove air, followed by heating to a target temperature by a high frequency heating reaction.
- Embodiments 1 to 6 according to the present invention configured as described above were performed as follows in the apparatus of FIG.
- the ore used in this experiment has a particle size of 48 mesh or less, and the main components are molybdenite concentrates consisting of Mo: 49.3%, S: 34.8%, Cu: 1.62%, Fe: 2.17%, and gangue: 8.11%.
- Aluminum, a reducing agent used as a sample was in powder form and had a purity of 99.7% or more and a particle size of 16 # or less, and an iron as an additive was also used in a powder form with a purity of 98% or more and a particle size of 200 # or less.
- the reduction reaction was performed using an alumina crucible having a diameter of 8 cm and a height of 12 cm as a reactor.
- the experiment was carried out by placing a mixed sample in a reactor and charging the graphite crucible of the apparatus shown in FIG. 1.
- the flow rate of argon is 5 l / min. After flowing for 20 minutes at a flow rate, heating was started, and the reaction was carried out for 10 minutes after raising to 1690 ° C. in 70 minutes, and then allowed to stand for 12 hours to naturally cool to room temperature.
- the reaction product was good in the separation of slag and feromolybdenum in the experimental region and the XRD pattern of the ferro molybdenum prepared as shown in Figure 2 was analyzed.
- Table 2 shows the content of molybdenum (Mo) in the ferro molybdenum prepared in Examples 1 to 6 and the concentration and removal rate of copper as an impurity. As shown in Table 2, it can be seen that the content of molybdenum (Mo) in the ferro molybdenum prepared in the embodiment according to the present invention is 55% or more, and the removal rate of copper is MoS 2 reference equivalent when the amount of aluminum added is 36g It was the highest as the maximum 96%, it was confirmed that the removal rate of copper decreases as the amount added.
- Figure 2 shows the X-ray Diffraction Pattern of the ferro molybdenum prepared in Examples 1 to 6, it can be seen that the metal sulfide phase does not exist at 38g or more (105% of Morlwns chemical equivalent) of aluminum.
- iron and a reducing agent are added to the molten lead ore and reacted in an induction furnace to remove more than 95% of the maximum contained copper. It can be seen that it is possible to manufacture ferro molybdenum for steelmaking without a process.
Abstract
Description
Claims (7)
- a) 구리함량이 0.5~10%인 휘수연광에 철 및 금속 알루미늄을 첨가하여 혼합하는 단계;b) 상기 혼합물을 아르곤 가스 분위기하에 가열장치 내의 온도를 1100~2000℃로 하여 반응시키는 단계: 및c) 상기 반응이 종료된 후 상온에서 자연 냉각시켜 반응 생성물을 얻는 단계;를 포함하는 페로몰리브덴의 제조방법.
- 제1항에 있어서,상기 a)의 혼합하는 단계는 휘수연광 60~70wt%, 철 15~20wt% 및 금속 알루미늄 10~20wt%을 혼합하는 것이 특징인 페로몰리브덴의 제조방법.
- 제1항에 있어서,상기 반응 생성물은 구리 함량이 0.5% 미만인 것을 특징으로 하는 페로몰리브덴의 제조방법.
- 제1항에 있어서,상기 가열장치는 직접 또는 간접 가열방식의 로를 포함하는 페로몰리브덴의 제조방법.
- 제4항에 있어서,상기 가열장치는 유도 가열 방식인 것을 특징으로 하는 페로몰리브덴의 제조방법.
- 제1항에 있어서,상기 b)단계의 반응은 10~30분간 실시하는 것을 특징으로 하는 페로몰리브덴의 제조방법.
- 제1항에 있어서,상기 가열장치 내를 아르곤을 포함하는 불활성 기체를 흘려 공기로부터 차단하는 것을 특징으로 하는 페로몰리브덴의 제조방법.
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP10856474.1A EP2548985B1 (en) | 2010-08-26 | 2010-10-20 | Method for preparing ferro molybdenum from molybdenite |
AU2010355261A AU2010355261C1 (en) | 2010-08-26 | 2010-10-20 | Manufacturing method of ferromolybdenum from molybdenite |
RU2011152616/02A RU2553141C2 (ru) | 2010-08-26 | 2010-10-20 | Способ производства ферромолибдена из молибденита |
CN201080001776.5A CN102812143B (zh) | 2010-08-26 | 2010-10-20 | 由辉钼矿制造钼铁的方法 |
US12/995,870 US8268034B2 (en) | 2010-08-26 | 2010-10-20 | Manufacturing method of ferromolybdenum from molybdenite |
JP2012530793A JP5074642B1 (ja) | 2010-08-26 | 2010-10-20 | 輝水鉛鉱からのフェロモリブデンの製造方法 |
CA2763117A CA2763117C (en) | 2010-08-26 | 2010-10-20 | Manufacturing method of ferromolybdenum from molybdenite |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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KR10-2010-0082876 | 2010-08-26 | ||
KR1020100082876A KR101029368B1 (ko) | 2010-08-26 | 2010-08-26 | 휘수연광으로부터 페로몰리브덴의 제조방법 |
Publications (1)
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WO2012026649A1 true WO2012026649A1 (ko) | 2012-03-01 |
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Family Applications (1)
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PCT/KR2010/007193 WO2012026649A1 (ko) | 2010-08-26 | 2010-10-20 | 휘수연광으로부터 페로몰리브덴의 제조방법 |
Country Status (9)
Country | Link |
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US (1) | US8268034B2 (ko) |
EP (1) | EP2548985B1 (ko) |
JP (1) | JP5074642B1 (ko) |
KR (1) | KR101029368B1 (ko) |
CN (1) | CN102812143B (ko) |
AU (1) | AU2010355261C1 (ko) |
CA (1) | CA2763117C (ko) |
RU (1) | RU2553141C2 (ko) |
WO (1) | WO2012026649A1 (ko) |
Families Citing this family (9)
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CN102534273A (zh) * | 2012-01-01 | 2012-07-04 | 洛阳钼业集团金属材料有限公司 | 一种硅铝热法冶炼钼铁工艺 |
WO2013108638A1 (ja) * | 2012-01-19 | 2013-07-25 | 日本精工株式会社 | 自己潤滑性複合材料、並びにそれを用いた転がり軸受、直動装置、ボールねじ装置、直動案内装置、及び搬送装置 |
KR20150064258A (ko) * | 2013-11-28 | 2015-06-11 | 한국지질자원연구원 | 구리 함유 휘수연광의 전처리 방법 |
CN104492553A (zh) * | 2014-11-28 | 2015-04-08 | 周正英 | 一种密闭式砂磨机 |
CN104593672A (zh) * | 2014-11-28 | 2015-05-06 | 周正英 | 一种多功能行星齿轮减速器 |
CN104630450A (zh) * | 2015-02-06 | 2015-05-20 | 铜陵百荣新型材料铸件有限公司 | 一种钼铁冶金炉料的生产工艺 |
CN106964310B (zh) * | 2017-05-04 | 2019-12-03 | 中国科学院广州地球化学研究所 | 一种用于重金属离子吸附的改性二硫化钼及其制备方法 |
CN106975439B (zh) * | 2017-05-05 | 2019-09-17 | 中国科学院广州地球化学研究所 | 一种用于吸附挥发性有机污染物的Si/SiOx纳米复合材料及其制备方法 |
CN112427648B (zh) * | 2020-11-30 | 2022-08-30 | 长安大学 | 一种金属钼粉制备方法与制备装置 |
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KR100637656B1 (ko) * | 2005-06-16 | 2006-10-24 | 주식회사 에너텍 | 환원반응을 이용한 페로몰리브덴의 제조방법 및 그 방법을이용하여 제조된 페로몰리브덴 |
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2010
- 2010-08-26 KR KR1020100082876A patent/KR101029368B1/ko active IP Right Grant
- 2010-10-20 CA CA2763117A patent/CA2763117C/en not_active Expired - Fee Related
- 2010-10-20 WO PCT/KR2010/007193 patent/WO2012026649A1/ko active Application Filing
- 2010-10-20 US US12/995,870 patent/US8268034B2/en active Active
- 2010-10-20 CN CN201080001776.5A patent/CN102812143B/zh not_active Expired - Fee Related
- 2010-10-20 AU AU2010355261A patent/AU2010355261C1/en not_active Ceased
- 2010-10-20 EP EP10856474.1A patent/EP2548985B1/en not_active Not-in-force
- 2010-10-20 JP JP2012530793A patent/JP5074642B1/ja not_active Expired - Fee Related
- 2010-10-20 RU RU2011152616/02A patent/RU2553141C2/ru not_active IP Right Cessation
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KR100637656B1 (ko) * | 2005-06-16 | 2006-10-24 | 주식회사 에너텍 | 환원반응을 이용한 페로몰리브덴의 제조방법 및 그 방법을이용하여 제조된 페로몰리브덴 |
KR100646573B1 (ko) * | 2005-09-16 | 2006-11-23 | 엄춘화 | 페로몰리브덴의 제조장치 및 제조방법 |
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JP2009263723A (ja) * | 2008-04-25 | 2009-11-12 | Kobe Steel Ltd | フェロモリブデンの製造方法 |
JP2010132501A (ja) * | 2008-12-05 | 2010-06-17 | Kobe Steel Ltd | フェロモリブデンの製造方法およびフェロモリブデン |
Also Published As
Publication number | Publication date |
---|---|
RU2011152616A (ru) | 2014-10-10 |
KR101029368B1 (ko) | 2011-04-13 |
CN102812143A (zh) | 2012-12-05 |
US8268034B2 (en) | 2012-09-18 |
CA2763117A1 (en) | 2012-02-26 |
US20120174709A1 (en) | 2012-07-12 |
AU2010355261B2 (en) | 2013-07-11 |
AU2010355261A1 (en) | 2012-03-15 |
CA2763117C (en) | 2014-03-18 |
CN102812143B (zh) | 2014-09-03 |
EP2548985B1 (en) | 2016-08-03 |
AU2010355261C1 (en) | 2013-11-21 |
EP2548985A4 (en) | 2015-09-16 |
RU2553141C2 (ru) | 2015-06-10 |
EP2548985A1 (en) | 2013-01-23 |
JP2012529570A (ja) | 2012-11-22 |
JP5074642B1 (ja) | 2012-11-14 |
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