JPS63289496A - Fluidizing bed system - Google Patents
Fluidizing bed systemInfo
- Publication number
- JPS63289496A JPS63289496A JP62125331A JP12533187A JPS63289496A JP S63289496 A JPS63289496 A JP S63289496A JP 62125331 A JP62125331 A JP 62125331A JP 12533187 A JP12533187 A JP 12533187A JP S63289496 A JPS63289496 A JP S63289496A
- Authority
- JP
- Japan
- Prior art keywords
- fluidized bed
- supplied
- roasting
- heater
- reducing gas
- 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
Links
- 239000007787 solid Substances 0.000 claims abstract description 11
- 238000010438 heat treatment Methods 0.000 claims description 27
- 238000010298 pulverizing process Methods 0.000 claims description 3
- 239000000843 powder Substances 0.000 abstract description 27
- 238000000034 method Methods 0.000 abstract description 7
- 238000006243 chemical reaction Methods 0.000 abstract description 5
- 239000008188 pellet Substances 0.000 abstract description 5
- 238000003860 storage Methods 0.000 abstract description 5
- 229910052770 Uranium Inorganic materials 0.000 abstract description 4
- 238000010521 absorption reaction Methods 0.000 abstract description 4
- 238000012432 intermediate storage Methods 0.000 abstract description 4
- JFALSRSLKYAFGM-UHFFFAOYSA-N uranium(0) Chemical compound [U] JFALSRSLKYAFGM-UHFFFAOYSA-N 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract 2
- 238000006722 reduction reaction Methods 0.000 description 13
- 239000000243 solution Substances 0.000 description 11
- 238000000605 extraction Methods 0.000 description 7
- 239000002245 particle Substances 0.000 description 5
- 230000000704 physical effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005243 fluidization Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000000227 grinding Methods 0.000 description 2
- 239000011259 mixed solution Substances 0.000 description 2
- ZQPKENGPMDNVKK-UHFFFAOYSA-N nitric acid;plutonium Chemical compound [Pu].O[N+]([O-])=O ZQPKENGPMDNVKK-UHFFFAOYSA-N 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 229910002007 uranyl nitrate Inorganic materials 0.000 description 2
- 238000010924 continuous production Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000012958 reprocessing Methods 0.000 description 1
- 239000012798 spherical particle Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- SANRKQGLYCLAFE-UHFFFAOYSA-H uranium hexafluoride Chemical compound F[U](F)(F)(F)(F)F SANRKQGLYCLAFE-UHFFFAOYSA-H 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
Landscapes
- Inorganic Compounds Of Heavy Metals (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は硝酸プルトニウム溶液、硝酸ウラニル溶液もし
くはそれらの混合溶液等を連続的にペレットに製造し易
い粉末にし、また硝酸ウラニル溶液を連続的に６ぶつ化
ウラン製造に適した物性を持つ粉末にすることができる
流動床システムに関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention is directed to powdering a plutonium nitrate solution, a uranyl nitrate solution, a mixed solution thereof, etc. that can be easily made into pellets continuously, The present invention relates to a fluidized bed system that can produce powder with physical properties suitable for producing uranium hexabutide.
一般に、流動床で作製される粉末は、シーズ（核、種子
）のまわりに粉末形成物質が付着し、硬い球状の粒子が
作製される。そのため、焼結性が悪く、高密度のベレッ
トを作製するのが困難で、さらに比表面積が小さいため
反応が遅いなどの欠点がある。そこで従来、この粉末物
性を改良するため、ジェットミル等で粒子を再度粉砕し
ていた。In general, powder produced in a fluidized bed has a powder-forming substance attached around the seeds (nuclei, seeds) to produce hard spherical particles. Therefore, it has disadvantages such as poor sinterability, difficulty in producing high-density pellets, and slow reaction due to its small specific surface area. Conventionally, in order to improve the physical properties of this powder, the particles have been re-pulverized using a jet mill or the like.
しかしながら、ジェットミル等で粒子を再度粉砕しよう
としても、粒子が小さくて硬いため粉砕が困難であると
共に、微粉の回収が必要であり、また、ジェットミルか
ら不純物が混入するなどの欠点があった。そのためペレ
ット製造が容易な活性の高い粉末を連続的に製造する方
法の開発が望まれていた。However, even if an attempt was made to re-pulverize the particles using a jet mill, etc., the particles were small and hard, making it difficult to re-pulverize the particles, requiring collection of the fine powder, and also having drawbacks such as impurities being mixed in from the jet mill. . Therefore, it has been desired to develop a method for continuously producing highly active powder that can be easily pelletized.
本発明は上記問題点を解決するためのもので、物性の良
い粉末を作製するため、マイクロ波で加熱・脱硝して液
体を固体に転換し、物性の良い粉末にし、さらに残留す
る揮発成分の除去、粉末物性の調整を流動床で行うこと
により、連続的製造が可能であると共に、反応時間の短
縮、設備の小型化を図る・ことができる流動床システム
を提供することを目的とする。The present invention is intended to solve the above-mentioned problems. In order to produce powder with good physical properties, the liquid is converted into a solid by heating and denitration using microwaves, and the remaining volatile components are removed. The purpose of the present invention is to provide a fluidized bed system that enables continuous production, shortens reaction time, and downsizes equipment by performing removal and adjustment of powder physical properties in a fluidized bed.
そのために本発明の流動床システムは、被処理溶液が供
給されるマイクロ波加熱手段と、加熱脱硝して得られた
固体を粉砕するミルと、粉砕された産物が供給されると
共に、焙焼用空気、還元用空気が供給される流動床とを
備え、前記流動床では、マイクロ波加熱による脱硝・焙
焼で不十分な場合、焙焼用空気を供給して焙焼した後、
還元用ガスを供給して還元し、マイクロ波加熱による脱
硝・焙焼で十分な場合、還元用ガスを用いて還元するこ
と、及び被処理溶液が供給されるマイクロ波加熱手段と
、加熱脱硝して得られた固体を粉砕するミルと、粉砕さ
れた産物が供給されると共に、焙焼用空気が供給される
焙焼用流動床と、焙焼用流動床で焙焼されて得られた産
物が供給されると共に、還元用ガスが供給される還元用
流動床とを備えたことを特徴とする。To this end, the fluidized bed system of the present invention includes a microwave heating means to which a solution to be treated is supplied, a mill for pulverizing the solid obtained by heating denitrification, a mill to which the pulverized product is supplied, and a torrefaction and a fluidized bed to which air and reducing air are supplied, and in the fluidized bed, if denitrification and roasting by microwave heating are insufficient, after roasting by supplying roasting air,
When it is sufficient to perform reduction by supplying a reducing gas and denitrifying and roasting by microwave heating, the method includes reducing by using a reducing gas, and a microwave heating means to which the solution to be treated is supplied, and heating denitrification. A mill that grinds the solid obtained by grinding, a fluidized bed for torrefaction to which the ground product is supplied as well as air for torrefaction, and a product obtained by torrefaction in the fluidized bed for torrefaction. and a reducing fluidized bed to which a reducing gas is supplied.
本発明の流動床システムは、流動床の前処理工程にマイ
クロ波加熱による脱硝・焙焼工程を設けて被処理液を固
体とし、この固体を焙焼・還元反応及び流動し易い粒径
に粉砕調整し、流動床で焙焼、還元することにより製品
粉末を生成する。The fluidized bed system of the present invention includes a denitrification and roasting process using microwave heating in the pretreatment process of the fluidized bed to make the liquid to be treated solid, and this solid is subjected to a roasting and reduction reaction and pulverized to a particle size that is easy to flow. A product powder is produced by adjusting, roasting and reducing in a fluidized bed.
以下、実施例を図面を参照して説明する。 Examples will be described below with reference to the drawings.
第１図は本発明による流動床システムの一実施例を示す
図で、図中、１は被処理溶液、２はマイクロ波加熱装置
、３はミル、４は中間貯槽、５は粉末供給機、６は流動
床、７は焙焼用空気供給源、８は空気加熱器、９は加熱
器、１０は還元用ガス供給源、１１は還元ガス加熱器、
１２は産物抜出管、１３は貯槽、１４は吸収塔である。FIG. 1 is a diagram showing an embodiment of the fluidized bed system according to the present invention, in which 1 is a solution to be treated, 2 is a microwave heating device, 3 is a mill, 4 is an intermediate storage tank, 5 is a powder feeder, 6 is a fluidized bed, 7 is a torrefaction air supply source, 8 is an air heater, 9 is a heater, 10 is a reducing gas supply source, 11 is a reducing gas heater,
12 is a product extraction pipe, 13 is a storage tank, and 14 is an absorption tower.
図において、硝酸プルトニウム溶液、硝酸ウラニル溶液
もしくはそれらの混合溶液等から良好な物性を持つ粉末
を得たい場合、原料の被処理溶液ｌを連続式あるいはバ
ッチ式のマイクロ波加熱装置２により加熱脱硝し、得ら
れた固体を所定のサイズ以下に粉砕するミル３により時
間等所定の条件下において流動床６で焙焼・還元できる
ように粉砕する。この粉砕された産物は中間貯槽４に貯
えられるか、もしくはそのまま粉末供給機５により流動
床６の中に供給される。バッチ式に焙焼・還元を行う場
合には、流動・加熱・焙焼反応のための焙焼用空気供給
源７からの空気を必要に応じて空気加熱器８で加熱し、
加熱昇温した空気を加熱器９により加熱されている流動
床６に供給し、同時に粉末供給機５より粉砕された産物
を所定量、流動床６に供給する。所定量に達したところ
で粉末供給機５を停止し、所定時間焙焼を行う。In the figure, when it is desired to obtain a powder with good physical properties from a plutonium nitrate solution, a uranyl nitrate solution, or a mixed solution thereof, the raw material solution l is heated and denitrified using a continuous or batch type microwave heating device 2. The obtained solid is pulverized by a mill 3 to a size smaller than a predetermined size so that it can be roasted and reduced in a fluidized bed 6 under predetermined conditions such as time. This pulverized product is stored in an intermediate storage tank 4 or fed directly into a fluidized bed 6 by a powder feeder 5. When torrefaction/reduction is performed in a batch manner, air from the torrefaction air supply source 7 for fluidization, heating, and torrefaction reactions is heated with an air heater 8 as necessary;
The heated air is supplied to the fluidized bed 6 which is heated by the heater 9, and at the same time, a predetermined amount of the pulverized product is supplied from the powder feeder 5 to the fluidized bed 6. When a predetermined amount is reached, the powder feeder 5 is stopped and roasting is performed for a predetermined time.
焙焼終了後、例えば９５％Ｎ２．５％Ｈ２の還元用ガス
を、還元用ガス供給源１０から必要に応じて還元ガス加
熱器１１を介して流動床６に供給し還元反応を行う。After the roasting is completed, a reducing gas of, for example, 95% N2.5% H2 is supplied from the reducing gas supply source 10 to the fluidized bed 6 via the reducing gas heater 11 as required to carry out a reduction reaction.
反応終了後、産物は産物抜出管１２を経て貯槽１３に保
管され、必要に応じて払い出される。マイクロ波加熱装
置２および流動床６からの排ガスは吸収塔１４に供給処
理され、それぞれ排ガス及び排液は図示しない排気処理
系、排水処理系へ移される。After the reaction is completed, the product is stored in a storage tank 13 via a product extraction pipe 12 and discharged as necessary. The exhaust gas from the microwave heating device 2 and the fluidized bed 6 is supplied to the absorption tower 14 for treatment, and the exhaust gas and waste liquid are respectively transferred to an exhaust treatment system and a wastewater treatment system (not shown).
第２図は本発明による流動床システムの他の実施例を示
す図で、第１図と同一番号は同一内容を示している。な
お図中、５１は粉末供給機、６１は焙焼用流動床、６２
は還元用流動床、９１．９２は加熱器、１２１は産物抜
出管である。FIG. 2 is a diagram showing another embodiment of the fluidized bed system according to the present invention, and the same numbers as in FIG. 1 indicate the same contents. In the figure, 51 is a powder feeder, 61 is a fluidized bed for torrefaction, and 62 is a powder feeder.
91 and 92 are heaters, and 121 is a product extraction pipe.
第１図の場合と同様に、被処理溶液ｌはマイクロ波加熱
装置２により加熱・脱硝され、得られた固体はミル３に
より粉砕される。粉砕された粉末は連続的に粉末供給機
５により焙焼のため焙焼用流動床６１の中に供給される
。焙焼用流動床６１は加熱器９１により加熱され、さら
に流動・加熱・焙焼反応のための焙焼用空気供給源７か
ら必要に応じて空気加熱器８を介して供給される。被処
理物は焙焼用流動床６１で焙焼された後、産物抜出管１
２を介して抜き出され、粉末供給機５１より還元用流動
床６２に供給される。還元用流動床６２は加熱器９２に
より加熱され、さらに流動・加熱・還元反応のための還
元用ガス１０が必要に応じ還元ガス加熱器１１を介して
供給される。As in the case of FIG. 1, the solution 1 to be treated is heated and denitrated by the microwave heating device 2, and the obtained solid is pulverized by the mill 3. The ground powder is continuously fed by a powder feeder 5 into a fluidized torrefaction bed 61 for torrefaction. The fluidized bed for torrefaction 61 is heated by a heater 91, and is further supplied via an air heater 8 as necessary from a torrefaction air supply source 7 for fluidization, heating, and torrefaction reactions. The material to be processed is roasted in the fluidized bed 61 for roasting, and then transferred to the product extraction pipe 1.
2 and supplied to a reduction fluidized bed 62 from a powder feeder 51. The reducing fluidized bed 62 is heated by a heater 92, and further a reducing gas 10 for fluidization, heating, and reduction reaction is supplied via a reducing gas heater 11 as necessary.
還元終了後、被処理物は産物抜出管１２１を経て還元用
流動床６２より抜き出され、貯槽１３に保管され、必要
に応じ払い出される。After completion of the reduction, the material to be treated is extracted from the reduction fluidized bed 62 via the product extraction pipe 121, stored in the storage tank 13, and discharged as needed.
なお上記実施例においては流動床を用いたが、この他に
粉体気送管、サイクロンによる粉体分離機等でも同様な
効果を得ることができる。Although a fluidized bed was used in the above embodiments, similar effects can be obtained by using a powder pneumatic pipe, a powder separator using a cyclone, or the like.
以上のように本発明によれば、再処理工場の回収ウラン
脱硝用流動床の前段階のプロセスとしてマイクロ波加熱
装置を追加設置し、現存する流動床を焙焼、還元用に転
用することにより、回収ウラン溶液をペレットとして製
造可能な粉末および６ふっ化ウランに転換することが容
易な粉末にすることができ、また、新規の建家および焙
焼・還元炉が不要となり、現有設備利用を図ることがで
きる。そして静置加熱の場合、空気中で７５０℃、４時
間で焙焼しているが、流動床による場合では空気中で７
５０℃、２時間で焙焼することができ、さらに静置加熱
の場合、Ｎ２９５％、Ｈ，５％中で７５０°Ｃ１４時間
で還元しているが、流動床ではＮ２３０％、Ｈ２７０％
中で５５０℃、４時間で還元することができた。As described above, according to the present invention, a microwave heating device is additionally installed as a pre-stage process for the fluidized bed for denitrification of recovered uranium in a reprocessing plant, and the existing fluidized bed is diverted to roasting and reduction. , the recovered uranium solution can be made into a powder that can be manufactured into pellets and a powder that can be easily converted into uranium hexafluoride, and it also eliminates the need for a new building and roasting/reduction furnace, making it possible to use existing equipment. can be achieved. In the case of static heating, roasting is performed in air at 750°C for 4 hours, but in the case of fluidized bed heating, roasting is performed in air at 750°C for 4 hours.
Roasting can be performed at 50°C for 2 hours, and in the case of static heating, the reduction is performed at 750°C for 14 hours in 95% N2 and 5% H2, but in a fluidized bed, the roasting process can be carried out in 30% N2 and 70% H2.
The reduction could be carried out in 4 hours at 550°C.
第１図は本発明による流動床システムの一実施例を示す
図、第２図は本発明による流動床システムの他の実施例
を示す図である。
■・・・被処理溶液、２・・・マイクロ波加熱装置、３
・・・ミル、４・・・中間貯槽、５・・・粉末供給機、
６・・・流動床、７・・・焙焼用空気、８・・・空気加
熱器、９・・・加熱器、１０・・・還元用ガス、１１・
・・還元ガス加熱器、１２・・・産物抜出管、１３・・
・貯槽、１４・・・吸収塔、５１・・・粉末供給機、６
１・・・焙焼用流動床、６２・・・還元用流動床、９１
．９２・・・加熱機、１２１・・・産物抜出管。FIG. 1 is a diagram showing one embodiment of the fluidized bed system according to the present invention, and FIG. 2 is a diagram showing another embodiment of the fluidized bed system according to the present invention. ■...Solution to be treated, 2...Microwave heating device, 3
... Mill, 4 ... Intermediate storage tank, 5 ... Powder feeder,
6... Fluidized bed, 7... Air for roasting, 8... Air heater, 9... Heater, 10... Reducing gas, 11.
...Reducing gas heater, 12...Product extraction pipe, 13...
- Storage tank, 14... Absorption tower, 51... Powder feeder, 6
1...Fluidized bed for roasting, 62...Fluidized bed for reduction, 91
．． 92...Heating machine, 121...Product extraction pipe.
Claims (6)
加熱脱硝して得られた固体を粉砕するミルと、粉砕され
た産物が供給されると共に、焙焼用空気、還元用ガスが
供給される流動床とを備え、前記流動床では、マイクロ
波加熱による脱硝・焙焼で不十分な場合、焙焼用空気を
供給して焙焼した後、還元用ガスを供給して還元し、マ
イクロ波加熱による脱硝・焙焼で十分な場合、還元用ガ
スを用いて還元することを特徴とする流動床システム。(1) Microwave heating means to which the solution to be treated is supplied;
It is equipped with a mill for pulverizing the solid obtained by heating denitrification, and a fluidized bed to which the pulverized product is supplied as well as roasting air and reducing gas. If denitrification and roasting by microwave heating are insufficient, supply roasting air and roast, then supply reducing gas to perform reduction. If denitrification and roasting by microwave heating are sufficient, reduce gas A fluidized bed system characterized by reduction using.
る特許請求の範囲第１項記載の流動床システム。(2) The fluidized bed system according to claim 1, wherein the roasting air and reducing gas are heated with a heater.
第１項記載の流動床システム。(3) The fluidized bed system according to claim 1, wherein the fluidized bed is heated with a heater.
加熱脱硝して得られた固体を粉砕するミルと、粉砕され
た産物が供給されると共に、焙焼用空気が供給される焙
焼用流動床と、焙焼用流動床で焙焼されて得られた産物
が供給されると共に、還元用ガスが供給される還元用流
動床とを備えた流動床システム。(4) microwave heating means to which the solution to be treated is supplied;
A mill for pulverizing the solid obtained by heating denitration, a fluidized bed for torrefaction to which the pulverized product is supplied as well as air for torrefaction, and a fluidized bed for torrefaction to which the solid obtained by torrefaction is supplied. A fluidized bed system comprising a reducing fluidized bed to which a reduced product is supplied and a reducing gas is supplied.
る特許請求の範囲第４項記載の流動床システム。(5) The fluidized bed system according to claim 4, wherein the roasting air and reducing gas are heated with a heater.
される特許請求の範囲第４項記載の流動床システム。(6) The fluidized bed system according to claim 4, wherein the torrefaction fluidized bed and the reduction fluidized bed are heated with a heater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12533187A JPH0711594B2 (en) | 1987-05-21 | 1987-05-21 | Fluidized bed system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12533187A JPH0711594B2 (en) | 1987-05-21 | 1987-05-21 | Fluidized bed system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63289496A true JPS63289496A (en) | 1988-11-25 |
| JPH0711594B2 JPH0711594B2 (en) | 1995-02-08 |
Family
ID=14907464
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12533187A Expired - Lifetime JPH0711594B2 (en) | 1987-05-21 | 1987-05-21 | Fluidized bed system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0711594B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998008989A1 (en) * | 1996-08-27 | 1998-03-05 | Emr Microwave Technology Corporation | Method for microwave induced oxidation of sulphidic ore material in fluidized bed without sulphur dioxide emissions |
| WO2007099315A1 (en) * | 2006-03-03 | 2007-09-07 | Anglo Operations Limited | Reduction processing of metal-containing ores in the presence of microwave and rf energy |
| CN102436859A (en) * | 2011-11-29 | 2012-05-02 | 清华大学 | A method for transforming neodymium-based high-acid solution |
| CN110396594A (en) * | 2019-08-21 | 2019-11-01 | 东北大学 | Microwave Continuous Suspension Roasting Method for Enhancing Iron Improvement and Phosphorus Reduction of Oolitic Hematite with High Phosphorus |
| JP2023138060A (en) * | 2022-03-18 | 2023-09-29 | 三菱重工業株式会社 | High-level radioactive material processing system and high-level radioactive material processing method |
-
1987
- 1987-05-21 JP JP12533187A patent/JPH0711594B2/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998008989A1 (en) * | 1996-08-27 | 1998-03-05 | Emr Microwave Technology Corporation | Method for microwave induced oxidation of sulphidic ore material in fluidized bed without sulphur dioxide emissions |
| WO2007099315A1 (en) * | 2006-03-03 | 2007-09-07 | Anglo Operations Limited | Reduction processing of metal-containing ores in the presence of microwave and rf energy |
| CN102436859A (en) * | 2011-11-29 | 2012-05-02 | 清华大学 | A method for transforming neodymium-based high-acid solution |
| CN110396594A (en) * | 2019-08-21 | 2019-11-01 | 东北大学 | Microwave Continuous Suspension Roasting Method for Enhancing Iron Improvement and Phosphorus Reduction of Oolitic Hematite with High Phosphorus |
| CN110396594B (en) * | 2019-08-21 | 2021-06-08 | 东北大学 | Microwave continuous suspension roasting method for enhancing iron and phosphorus increase and reduction of high-phosphorus oolitic hematite |
| JP2023138060A (en) * | 2022-03-18 | 2023-09-29 | 三菱重工業株式会社 | High-level radioactive material processing system and high-level radioactive material processing method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0711594B2 (en) | 1995-02-08 |
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