CN104944472A - Preparation method of high fluidity tungsten oxide - Google Patents
Preparation method of high fluidity tungsten oxide Download PDFInfo
- Publication number
- CN104944472A CN104944472A CN201510339447.6A CN201510339447A CN104944472A CN 104944472 A CN104944472 A CN 104944472A CN 201510339447 A CN201510339447 A CN 201510339447A CN 104944472 A CN104944472 A CN 104944472A
- Authority
- CN
- China
- Prior art keywords
- furnace
- temperature
- tungsten oxide
- preparation
- tungsten
- 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
Abstract
The invention relates to a preparation method of high fluidity tungsten oxide. According to the preparation method, an ammonium-tungsten compound is taken as a raw material for calcination in a negative-pressure closed calcination furnace; the furnace temperature is controlled in a gradient manner; 2-6 temperature control belts are arranged in a calcination process; the temperature of a feeding end is 700-800 DEG C; the temperature of a discharging end is 500-700 DEG C; the temperature differences of previous temperature control belts and next temperature control belts are temperature gradients of 0-300 DEG C; the furnace vacuum degree is (0.1-0.5)*10<4> Pa; the calcination process in the negative pressure closed calcination furnace lasts for 20-50 min; furnace burden is cooled through a cooling water jacket arranged in the negative pressure closed calcination furnace, and then the cooled furnace burden is discharged for screening, so that a tungsten oxide product of which the fluidity is lower than or equal to 30 s/50 g. Through adoption of the preparation method, the obtained tungsten oxide product is high in fluidity, and the problems that automatic feeding equipment is non-uniform in feeding and the automatic weighing equipment is non-uniform in material weighing can be effectively solved; the automation degree of tungsten powder production is improved, the labor intensity is eased, and the cost in tungsten powder production is reduced.
Description
Technical field
The present invention relates to the preparation method of Tungsten oxide 99.999, particularly a kind of preparation method of high workability Tungsten oxide 99.999.
In the application, term " ammonium tungsten compound " is the general designation of same (mixing) the polyacid ammonium salt compound of tungsten and calcinate thereof.
In the application, term APT is the abbreviation of " ammonium paratungstate ".
In the application, term " Tungsten oxide 99.999 " refers to blue tungsten oxide or tungstic violet oxide.
Background technology
Tungsten is a kind of non-ferrous metal of infusibility, is also a kind of important strategic resource, is used widely because it has the premium propertiess such as fusing point is high, hardness is large, ductility is strong, wear-resisting and corrosion-resistant.
At present, major equipment mainly pusher reduction furnace and the rotary type reduction furnace of tungsten powder is produced.
The feeding manner of pusher reduction furnace is that Tungsten oxide 99.999 is placed in boat, and the promotion by push rod realizes charging and discharging.This feeding manner relates to the problem of weighing of Tungsten oxide 99.999, and the mode of weighing has two kinds: manually weigh and automatic Weighing.Manually weigh: shoveled from bucket in boat by Tungsten oxide 99.999 with scoop, each shovel 0.5-4kg(is according to actual tungsten powder production technique adjustment charge amount).Such production model causes the labour intensity of workman large, or even woman worker cannot be competent at this work.Automatic Weighing: feed bin Tungsten oxide 99.999 being placed in automatic material weighing machine, utilizes its flow by gravity in boat.Such production model, workman, without the need to shovel material, greatly alleviates the labour intensity of workman.Adopt the production model of automatic Weighing, require high to the mobility of Tungsten oxide 99.999, if the poor fluidity of Tungsten oxide 99.999, gravity flow has some setbacks, and will waste time, and makes automatic weighing equipment become nonsensical, and the weight fluctuation of weighing is large, affects the quality of production of tungsten powder.
The feeding manner of rotary type reduction furnace is opening for feed Tungsten oxide 99.999 being placed in reduction furnace, utilizes himself flow by gravity in boiler tube.Such production model avoids manually shovels material, but requires high to the mobility of Tungsten oxide 99.999.If the poor fluidity of Tungsten oxide 99.999, the inlet amount fluctuation of Tungsten oxide 99.999 so can be caused large, affect the quality of production of tungsten powder.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of preparation method of high workability Tungsten oxide 99.999, can improve the level of automation that tungsten powder is produced, alleviate the labour intensity of employee, and reduce the production cost of tungsten powder.
For solving the problems of the technologies described above, technical scheme of the present invention is: a kind of preparation method of high workability Tungsten oxide 99.999, comprising:
[1] with ammonium tungsten compound for raw material, calcine in the calcining furnace that negative pressure is airtight, gradient type is adopted to control fire box temperature, calcination process is provided with 2-6 temperature control cincture, feed end temperature 700 DEG C-800 DEG C, discharge end temperature 500 DEG C-700 DEG C, front temperature band and the rear temperature band temperature difference 0 DEG C of-300 DEG C of thermograde;
[2] vacuum tightness (0.1-1.5) × 10 in calcining furnace burner hearth
4pa, calcining furnace furnace protection atmosphere is non-oxidizing atmosphere;
[3] feed material feed rates 50-250kg/h;
[4] in the airtight calcining furnace of negative pressure, 20-50min is calcined;
[5] furnace charge is come out of the stove after being cooled by the cooling water jecket that calcining furnace is provided with, and sieves subsequently and obtains the Tungsten oxide 99.999 product of mobility≤30s/50g.
Described calcining furnace is rotary kiln or without boat belt continuous calcining stove.The mesh density of sieving after coming out of the stove after described furnace charge cools requires to determine sieve number according to product granularity.
The invention has the beneficial effects as follows: the Tungsten oxide 99.999 that the present invention produces has high workability, efficiently solve the problem of automatic feed equipment charging inequality and the problem of automatic weighing equipment weighing inequality.Improve the level of automation that tungsten powder is produced, alleviate the labour intensity of employee, thus reduce the production cost of tungsten powder.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is the schematic diagram of high workability Tungsten oxide 99.999 preparation technology.
Embodiment
embodiment 1 as shown in Figure 1: APT is inserted in feeding warehouse, be that speed sends into vacuum tightness (0.5-0.8) × 10 by screw feeder with 220kg/h
4in the rotary kiln of Pa, pass into protective gas nitrogen, temperature control is: 755 DEG C, a band, 755 DEG C, two band, 650 DEG C, three band, 635 DEG C, four band, five are with 635 DEG C, 635 DEG C, six band.After rotary kiln calcining, cooling is sieved, and can obtain the Tungsten oxide 99.999 that mobility is 26s/50g.
embodiment 2 as shown in Figure 1: APT is inserted in feeding warehouse, be that speed sends into vacuum tightness (0.5-0.8) × 10 by screw feeder with 200kg/h
4in the rotary kiln of Pa, pass into protective gas nitrogen, temperature control is: 800 DEG C, a band, 800 DEG C, two band, 650 DEG C, three band, 640 DEG C, four band, five are with 620 DEG C, 610 DEG C, six band.After rotary kiln calcining, cooling is sieved, and can obtain the Tungsten oxide 99.999 that mobility is 26s/50g.
embodiment 3 as shown in Figure 1: APT is inserted in feeding warehouse, be that speed sends into vacuum tightness (0.8-1.2) × 10 by screw feeder with 180kg/h
4in the rotary kiln of Pa, pass into protective gas nitrogen, temperature control is: 750 DEG C, a band, 750 DEG C, two band, 660 DEG C, three band, 660 DEG C, four band, five are with 550 DEG C, 550 DEG C, six band.After rotary kiln calcining, cooling is sieved, and can obtain the Tungsten oxide 99.999 that mobility is 27s/50g.
Claims (3)
1. a preparation method for high workability Tungsten oxide 99.999, comprising:
[1] with ammonium tungsten compound for raw material, calcine in the calcining furnace that negative pressure is airtight, gradient type is adopted to control fire box temperature, calcination process is provided with 2-6 temperature control cincture, feed end temperature 700 DEG C-800 DEG C, discharge end temperature 500 DEG C-700 DEG C, front temperature band and the rear temperature band temperature difference 0 DEG C of-300 DEG C of thermograde;
[2] vacuum tightness (0.1-1.5) × 10 in calcining furnace burner hearth
4pa, calcining furnace furnace protection atmosphere is non-oxidizing atmosphere;
[3] feed material feed rates 50-250kg/h;
[4] in the airtight calcining furnace of negative pressure, 20-50min is calcined;
[5] furnace charge is come out of the stove after being cooled by the cooling water jecket that calcining furnace is provided with, and sieves subsequently and obtains the Tungsten oxide 99.999 product of mobility≤30s/50g.
2. the preparation method of a kind of high workability Tungsten oxide 99.999 according to claim 1, is characterized in that: described calcining furnace is rotary kiln or without boat belt continuous calcining stove.
3. the preparation method of a kind of high workability Tungsten oxide 99.999 according to claim 1, is characterized in that: the mesh density of sieving after coming out of the stove after described furnace charge cools requires to determine sieve number according to product granularity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510339447.6A CN104944472B (en) | 2015-06-18 | 2015-06-18 | A kind of preparation method of high fluidity tungsten oxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510339447.6A CN104944472B (en) | 2015-06-18 | 2015-06-18 | A kind of preparation method of high fluidity tungsten oxide |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104944472A true CN104944472A (en) | 2015-09-30 |
| CN104944472B CN104944472B (en) | 2016-12-07 |
Family
ID=54159615
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510339447.6A Expired - Fee Related CN104944472B (en) | 2015-06-18 | 2015-06-18 | A kind of preparation method of high fluidity tungsten oxide |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104944472B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111362305A (en) * | 2020-04-21 | 2020-07-03 | 赣州海创钨业有限公司 | Orange tungsten for uniform superfine tungsten powder and preparation method thereof |
| CN116282175A (en) * | 2023-05-09 | 2023-06-23 | 江钨世泰科钨品有限公司 | Preparation method and system of superfine tungsten trioxide |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5125964A (en) * | 1990-09-10 | 1992-06-30 | General Electric Company | Fluidized bed process for preparing tungsten powder |
| CN101642816A (en) * | 2008-08-05 | 2010-02-10 | 江西稀有稀土金属钨业集团有限公司 | Process for producing tungsten powder |
| CN102923649A (en) * | 2012-11-05 | 2013-02-13 | 江苏和田科技材料有限公司 | Reduction hydrogen production compound furnace and device and method for ammonium paratungstate tungsten production by using same |
-
2015
- 2015-06-18 CN CN201510339447.6A patent/CN104944472B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5125964A (en) * | 1990-09-10 | 1992-06-30 | General Electric Company | Fluidized bed process for preparing tungsten powder |
| CN101642816A (en) * | 2008-08-05 | 2010-02-10 | 江西稀有稀土金属钨业集团有限公司 | Process for producing tungsten powder |
| CN102923649A (en) * | 2012-11-05 | 2013-02-13 | 江苏和田科技材料有限公司 | Reduction hydrogen production compound furnace and device and method for ammonium paratungstate tungsten production by using same |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111362305A (en) * | 2020-04-21 | 2020-07-03 | 赣州海创钨业有限公司 | Orange tungsten for uniform superfine tungsten powder and preparation method thereof |
| CN116282175A (en) * | 2023-05-09 | 2023-06-23 | 江钨世泰科钨品有限公司 | Preparation method and system of superfine tungsten trioxide |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104944472B (en) | 2016-12-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104291714B (en) | The production method of vertical mill grinding iron and steel ground-slag, slag powders and steel-making slag powder | |
| CN105016393B (en) | The preparation system of a kind of high-specific surface area indigo plant tungsten and method | |
| CN104944472B (en) | A kind of preparation method of high fluidity tungsten oxide | |
| CN107130105A (en) | A kind of method and its proportioner used for improving sinter basicity coefficient of stabilization | |
| CN106431035A (en) | Device and method for preparing building gypsum from phosphogypsum | |
| CN106630644B (en) | A kind of rare earth cinder microcrystalline glass and preparation method thereof | |
| CN105956404B (en) | A method of calculating the consumption of sinter iron material | |
| CN106007724B (en) | The preparation method of smelting metal high strength graphite silicon carbide crucible | |
| CN106995310A (en) | A kind of wear-resisting high-strength degree aluminum electric furnace cover and preparation method thereof | |
| CN106048110B (en) | It is a kind of to be realized using bf coal injection system by the method for air port spray titanium furnace retaining | |
| CN105798280B (en) | A kind of drainage agent | |
| CN109251016B (en) | Brown corundum, matched production and preparation equipment and production and preparation method | |
| JP6303685B2 (en) | How to charge the bellless blast furnace | |
| CN105731805A (en) | Method for preparing microcrystalline material from quartz sand waste residues | |
| CN105710360B (en) | A kind of production technology of drainage agent | |
| CN110372235B (en) | Cement raw material batching system and batching method | |
| CN104649564A (en) | Hot-wind charging device applied to glass furnace in furnace heating-up period | |
| CN109485280B (en) | Environment-friendly cement clinker manufacturing process | |
| CN110642542A (en) | Method for preparing lime for steelmaking refining | |
| JP2008081759A (en) | Method for producing briquet of raw material in steelmaking | |
| CN111499234A (en) | Improved raw material proportioning mode | |
| JP7226227B2 (en) | Clinker manufacturing method and clinker manufacturing apparatus | |
| CN110055407A (en) | A kind of method for adjusting rotation speed and device for pelletizer | |
| CN209349093U (en) | A kind of white fused alumina electric smelting block quality sorting equipment | |
| CN110093509A (en) | A method of utilizing the cigarette ash of bulk containing molybdenum Smelting Ferromolybdenum |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 330046 No. 118 West Beijing Road, Jiangxi, Nanchang Patentee after: JIANGXI TUNGSTEN HOLDING GROUP CO.,LTD. Address before: 330046 No. 118 West Beijing Road, Jiangxi, Nanchang Patentee before: JIANGXI RARE EARTH & RARE METALS TUNGSTEN GROUP HOLDING Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220208 Address after: 341000 Shuixi nonferrous metallurgy industrial base, Zhanggong District, Ganzhou City, Jiangxi Province Patentee after: JIANGWU H.C. STARCK TUNGSTEN PRODUCTS Co.,Ltd. Address before: 330046 No. 118 West Beijing Road, Jiangxi, Nanchang Patentee before: JIANGXI TUNGSTEN HOLDING GROUP CO.,LTD. |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161207 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |