CN104651637A - High-purity molybdenum trioxide processing technology - Google Patents
High-purity molybdenum trioxide processing technology Download PDFInfo
- Publication number
- CN104651637A CN104651637A CN201310572614.2A CN201310572614A CN104651637A CN 104651637 A CN104651637 A CN 104651637A CN 201310572614 A CN201310572614 A CN 201310572614A CN 104651637 A CN104651637 A CN 104651637A
- Authority
- CN
- China
- Prior art keywords
- molybdenum trioxide
- purity
- purity molybdenum
- processing technology
- powder
- 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
Abstract
The invention discloses a high-purity molybdenum trioxide processing technology, relates to a method for preparing molybdenum trioxide, and especially relates to the high-purity molybdenum trioxide processing technology. Aiming at the above problems, provided is the high-purity molybdenum trioxide processing technology having the advantages of high recovery rate, short time consuming, high purity and small environmental pollution. A molybdenum ore concentrate is processed by a sublimation method, and the technology comprises the steps: step one, carrying out screening treatment; step two, placing the molybdenum ore concentrate obtained from screening in water, cleaning, and soaking for 3 days; step three, calcining in a calcining furnace to obtain calcined sand; step four, allowing the calcined sand to pass through a 20 mesh sieve, and thus obtaining a sieved powder; step five, adding a reducing agent into the sieved powder; step six, placing the sieved powder in the calcining furnace, rising the temperature of the calcining furnace to 800-900 DEG C, and sublimating; and step seven, cooling gaseous molybdenum trioxide with a quenching medium, dedusting the cooled material, and thus obtaining produced high-purity molybdenum trioxide.
Description
Technical field
the present invention relates to a kind of method preparing molybdic oxide, especially relate to a kind of complete processing of high-purity molybdenum trioxide.
Background technology
molybdic oxide is a kind of colourless or pale yellow, transparent rhomboidal crystal.Density 4.692g/cm3, fusing point 795 DEG C, boiling point 1155 DEG C (distillation).During heating, flavescence look, restores time cold.Even if lower than in fusing point situation, also have the phenomenon that distils significantly.Molybdate and polymolybdote is generated with alkaline solution and many reactive metal oxides.
high-purity molybdenum trioxide is one of raw material producing molybdenum powder, is the main raw material producing fission catalyzer, hydrogenation catalyst, pigment, pottery and glass.In recent years, the domestic and international market demand of high-purity molybdenum trioxide is steadily increasing, and the output of domestic high-purity molybdenum trioxide is also in cumulative year after year.
present stage, the method for industrial general calcination ammonium molybdate produces molybdic oxide, or utilizes chemical method to be leached by concentrated molybdenum ore soda acid high pressure oxygenation, and separating impurity produces molybdate, decomposes high purity molybdic oxide.Along with the development of Materials science and utilisation technology, the obtained molybdic oxide of aforesaid method is because particle is thick, can not meet Special use requirement in aggregating state.
Summary of the invention
the present invention is exactly for the problems referred to above, provides the complete processing of high, consuming time short, purity is high, environmental pollution the is little high-purity molybdenum trioxide of a kind of rate of recovery.
in order to realize above-mentioned purpose of the present invention, the present invention adopts following technical scheme, and the present invention utilizes subliming method to process concentrated molybdenum ore, and processing step is.
step one, Screening Treatment.
step 2, the concentrated molybdenum ore screened is placed in water, cleaning, soaks 3 days.
carry out roasting in step 3, calcining furnace and make roasting sand.
step 4, roasting sand is crossed 20 mesh sieves, obtain the powder that sieves.
step 5, add reductive agent sieving in powder.
step 6, the powder that will sieve are placed in calcining furnace, calcining in-furnace temperature is risen to 800 ~ 900 DEG C and distils.
step 7, cool gaseous state molybdic oxide with quenching medium, cooled material is the high-purity molybdenum trioxide that the present invention produces after dedusting.
as a preferred embodiment of the present invention, described quenching medium is liquid nitrogen.
as another kind of preferred version of the present invention, described quenching medium is air.
beneficial effect of the present invention.
this invention simplifies technique, make the process time within tens hours, shorten to present about 100 seconds by original processing method.
the present invention is 1500 ~ 1900 DEG C at the technological temperature of sublimation stage, and this temperature can make two sulphur molybdenum rapid oxidation in concentrated molybdenum ore become molybdic oxide and sulfurous gas, and molybdic oxide distillation is simultaneously gas.When chance quenching medium gas drops to less than 600 DEG C, gaseous state molybdic oxide crystallizes into solid.Therefore the productive rate of product and purity all comparatively prior art improve, the high-purity molybdenum trioxide purity of existing working method processing is about 99%, and the purity of the product of the present invention's processing can reach 99.8%.
complete processing of the present invention is simple, technical process is short, and high being convenient to of sulfurous gas and valuable metal concentration in technological process is reclaimed, utilized, and both solves problem of environmental pollution, and has reclaimed again sulfurous gas and valuable metal, added economic benefit.
Embodiment
embodiment 1.
step one, Screening Treatment.
step 2, the concentrated molybdenum ore screened is placed in water, cleaning, soaks 3 days.
carry out roasting in step 3, calcining furnace and make roasting sand.
step 4, roasting sand is crossed 20 mesh sieves, obtain the powder that sieves.
step 5, add reductive agent sieving in powder.
step 6, the powder that will sieve are placed in calcining furnace, calcining in-furnace temperature is risen to 800 ~ 900 DEG C and distils.
step 7, cool gaseous state molybdic oxide with quenching medium, cooled material is the high-purity molybdenum trioxide that the present invention produces after dedusting.
be understandably, above about specific descriptions of the present invention, the technical scheme described by the embodiment of the present invention is only not limited to for illustration of the present invention, those of ordinary skill in the art is to be understood that, still can modify to the present invention or equivalent replacement, to reach identical technique effect; Needs are used, all within protection scope of the present invention as long as meet.
Claims (3)
1. a complete processing for high-purity molybdenum trioxide, it is characterized in that the present invention utilizes subliming method to process concentrated molybdenum ore, processing step is:
Step one, Screening Treatment;
Step 2, the concentrated molybdenum ore screened is placed in water, cleaning, soaks 3 days;
Carry out roasting in step 3, calcining furnace and make roasting sand;
Step 4, roasting sand is crossed 20 mesh sieves, obtain the powder that sieves;
Step 5, add reductive agent sieving in powder;
Step 6, the powder that will sieve are placed in calcining furnace, calcining in-furnace temperature is risen to 800 ~ 900 DEG C and distils;
Step 7, cool gaseous state molybdic oxide with quenching medium, cooled material is the high-purity molybdenum trioxide that the present invention produces after dedusting.
2. the complete processing of a kind of high-purity molybdenum trioxide according to claim 1, described quenching medium is liquid nitrogen.
3. the complete processing of a kind of high-purity molybdenum trioxide according to claim 1, described quenching medium is air.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310572614.2A CN104651637A (en) | 2013-11-18 | 2013-11-18 | High-purity molybdenum trioxide processing technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310572614.2A CN104651637A (en) | 2013-11-18 | 2013-11-18 | High-purity molybdenum trioxide processing technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104651637A true CN104651637A (en) | 2015-05-27 |
Family
ID=53243273
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310572614.2A Pending CN104651637A (en) | 2013-11-18 | 2013-11-18 | High-purity molybdenum trioxide processing technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104651637A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105458280A (en) * | 2016-01-12 | 2016-04-06 | 金堆城钼业股份有限公司 | Preparation method for highly-dispersed ultrafine molybdenum powder with narrow particle size distribution |
| CN109574076A (en) * | 2018-12-25 | 2019-04-05 | 上海三爱思试剂有限公司 | A kind of preparation method of high-purity molybdenum trioxide |
| CN110065969A (en) * | 2019-06-06 | 2019-07-30 | 中南大学 | The method that microwave calcining molybdenum concentrate ball block prepares pure molybdenum trioxide |
| CN110129573A (en) * | 2019-06-25 | 2019-08-16 | 国家能源投资集团有限责任公司 | The recyclable device and recovery method of molybdenum in catalysts containing molybdenum |
| CN111410229A (en) * | 2020-03-31 | 2020-07-14 | 陈慧 | Preparation method and equipment of high-purity molybdenum oxide |
| CN113828322A (en) * | 2020-06-24 | 2021-12-24 | 中国石油化工股份有限公司 | Molybdenum oxide, preparation method and application thereof |
| CN114606479A (en) * | 2022-03-11 | 2022-06-10 | 西安交通大学 | Molybdenum vapor deposition molding integrated device and method |
-
2013
- 2013-11-18 CN CN201310572614.2A patent/CN104651637A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105458280A (en) * | 2016-01-12 | 2016-04-06 | 金堆城钼业股份有限公司 | Preparation method for highly-dispersed ultrafine molybdenum powder with narrow particle size distribution |
| CN105458280B (en) * | 2016-01-12 | 2017-09-12 | 金堆城钼业股份有限公司 | A kind of preparation method of high dispersive, narrow size distribution ultrafine molybdenum powder |
| CN109574076A (en) * | 2018-12-25 | 2019-04-05 | 上海三爱思试剂有限公司 | A kind of preparation method of high-purity molybdenum trioxide |
| CN110065969A (en) * | 2019-06-06 | 2019-07-30 | 中南大学 | The method that microwave calcining molybdenum concentrate ball block prepares pure molybdenum trioxide |
| CN110129573A (en) * | 2019-06-25 | 2019-08-16 | 国家能源投资集团有限责任公司 | The recyclable device and recovery method of molybdenum in catalysts containing molybdenum |
| CN111410229A (en) * | 2020-03-31 | 2020-07-14 | 陈慧 | Preparation method and equipment of high-purity molybdenum oxide |
| CN113828322A (en) * | 2020-06-24 | 2021-12-24 | 中国石油化工股份有限公司 | Molybdenum oxide, preparation method and application thereof |
| CN113828322B (en) * | 2020-06-24 | 2024-01-30 | 中国石油化工股份有限公司 | Molybdenum oxide, preparation method and application thereof |
| CN114606479A (en) * | 2022-03-11 | 2022-06-10 | 西安交通大学 | Molybdenum vapor deposition molding integrated device and method |
| CN114606479B (en) * | 2022-03-11 | 2023-01-03 | 西安交通大学 | Molybdenum vapor deposition molding integrated device and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104651637A (en) | High-purity molybdenum trioxide processing technology | |
| CN104445212A (en) | Method for processing fly ash used for circulating fluidized bed | |
| CN104876250B (en) | Method for extracting lithium and removing aluminum by treating lepidolite with sulfuric acid | |
| CN104630482B (en) | A kind of alkali leaching ion-exchange process of waste denitration catalyst comprehensive utilization | |
| CN106276886A (en) | A kind of method of purification of diamond | |
| CN106676289A (en) | Method for preparing high-purity vanadium pentoxide by using vanadium-contained material | |
| CN110156030A (en) | A kind of fluorine-containing silicon slag purifying technique of fluosilicic acid | |
| CN105671323A (en) | Method for comprehensively recycling copper and rhenium from rhenium-rich residues | |
| CN113651342A (en) | Method for producing lithium product by processing lepidolite through nitric acid atmospheric pressure method | |
| CN111575478A (en) | Method for separating metal in heavy oil | |
| CN109022806A (en) | A method of utilizing the vanadium liquid removal of impurities clay standby vanadic anhydride of vanadium | |
| CN101983925A (en) | Preparation method of cerium oxide powder | |
| RU2515154C1 (en) | Method of producing vanadium pentoxide from vanadium-containing slag | |
| CN104774561A (en) | Method for preparing rare earth polishing powder and recovering ammonium salt by using fluorine-containing niobium-tantalum wastewater | |
| CN106636661A (en) | Method for selectively separating and recovering tellurium and antimony from tellurium residues | |
| CN108950181A (en) | A kind of preparation process of beryllium oxide | |
| CN103952534B (en) | A kind of method utilizing nickel-molybdenum ore to prepare Sodium orthomolybdate | |
| CN106365161B (en) | Purification of diamond method and its application | |
| CN114934169B (en) | Method for recycling tungsten-containing waste | |
| CN110255553A (en) | A kind of method that high-temperature vacuum prepares high purity graphite | |
| CN116177585A (en) | Method for purifying calcium fluoride from fluorine-containing sludge | |
| CN105543506A (en) | Method for producing high-purity chromium metal | |
| CN113620296B (en) | Method for producing coarse-particle tungsten carbide powder by using tungsten-containing waste | |
| CN106082205A (en) | A kind of method of purifying gold hard rock | |
| CN113479938A (en) | Method for preparing high-purity iron oxide by using iron oxide |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150527 |
|
| WD01 | Invention patent application deemed withdrawn after publication |