CN1274445C - Atomizing formation apparatus for producing spherical casting WC powder - Google Patents
Atomizing formation apparatus for producing spherical casting WC powder Download PDFInfo
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- CN1274445C CN1274445C CN 03117990 CN03117990A CN1274445C CN 1274445 C CN1274445 C CN 1274445C CN 03117990 CN03117990 CN 03117990 CN 03117990 A CN03117990 A CN 03117990A CN 1274445 C CN1274445 C CN 1274445C
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Abstract
The present invention discloses a device for producing spherical cast tungsten carbide powder by injection, atomization and shaping. The device comprises a gas intake assembly of low-pressure inert gas, a furnace body, an injection type atomizing and shaping assembly and a water cooling and circulating mechanism, wherein the furnace body comprises a feeder, a heater and a graphite furnace tube; the injection type atomizing and shaping assembly comprises a beam tube, an inner and outer nozzle, a gas supplying mechanism of high-pressure inert gas and an atomizing and shaping barrel. Raw material powder is protected by the inert gas, the gas flows of high-pressure inert gas act on melted solution, and the melted solution of the raw material powder is injected and atomized into the spherical powder. The device has the characteristics of compact structure, low equipment production and use cost, short technological process for producing spherical WC powder, high productivity, stable product quality, good spheroidization effect, uniform granularity, high hardness, low energy consumption and production cost, good product use effect, etc. The present invention overcomes the disadvantages existing in the background art or the disadvantages of high production cost, poor product quality, spheroidization effect and service performance, or large technological difficulty, low productivity, etc.
Description
Technical field
The invention belongs to a kind of equipment of producing the carbide alloy powder, particularly a kind of employing injecting type atomizing is shaped and produces the device of spherical cast tungsten carbide (WC) powder.It is the spherical casting tungsten carbide powders of 40～400 purposes that this device especially is suitable for the production granularity.
Background technology
Spherical cast tungsten carbide (WC) powder is because of the high and good wearability of its fusing point height (2600 ℃), hardness, good flowability and fillibility etc., but the mechanical performance of efficient hardening metallic element, thereby be widely used in the reinforcement of the parts metal surface that oil, geology, engineering machinery and roll etc. have relatively high expectations to anti-wear performance, with its operating efficiency of effective raising and service life.Traditional casting WC powder is to adopt graphite-tube furnace or tilting-type smelting furnace with WC and W (tungsten) powder mixed melting, is cooled to thin dendritic alloy block---WCW in the graphite fusion casting mold
2Behind the eutectic of C, by mechanical means such as ball mills it is clayed into power, the casting WC powder that this kind method is produced exists that production cost height, constant product quality are poor, the hardness and the WCW of product again
2The theoretical value of C differs greatly, and particulate form is irregular in addition, the serviceability when mobile and fillibility difference influences its surfacing or built-up welding again.At above-mentioned defective, someone has designed and a kind of the WC raw material has been made from the consumption rotary electric utmost point (anode), with the infusibility negative electrode axis direction over against, the WC anode that rotates at a high speed during work is in fusing under the effect of electric arc and cast electrode aside under action of centrifugal force, casts WC drop, liquid sheet final globular powder that forms under capillary effect of electrode aside.Though the casting WC powder that this method is produced has characteristics such as the balling-up of higher, the no slag inclusion of purity, powder is good, but have the equipment cost height, the manufacturing of WC consutrode is complicated, and casting WC powder productivity ratio is low, the production cost height, disadvantage such as be difficult to accomplish scale production; Solidify the disadvantage that influences its balling-up before when the WC liquation degree of superheat is not enough, also existing in addition because of nodularization.
And in the patent documentation of EP0687650A1, disclose a kind of by plasma torch in crucible with WC+W fusing, then liquation is poured on the atwirl coldplate with certain liquation a fluid stream, under inert gas shielding, make the WC spherical powder.Weak point, product ingredient stability, crystal grain are thin though this kind method has technological process, and hardness is higher, flow and give birth to better, and serviceability is preferably arranged when carrying out surfacing and built-up welding; Its combination property obviously is better than the casting WC powder by produced in conventional processes; But exist the material of coldplate and rotary speed that the quality influence of product more greatly, also is difficult to regulate effectively, control, nodularization efficient is lower, and the uniformity of product granularity is relatively poor and be difficult to produce the following defectives such as fine powder of 200 orders.
Therefore, the above-mentioned background technology exist or production cost height, product quality and poor stability, serviceability poor; Or the coldplate material requires height, technique controlling difficulty is big, nodularization rate uniformity lower, product granularity is relatively poor and be difficult to produce the following defectives such as fine powder of 200 orders.
Summary of the invention
The objective of the invention is defective at the background technology existence, a kind of device that adopts the jet atomization shaping to produce spherical cast tungsten carbide of research and design, to reach the structure of simplifying production technology and production equipment (device), realize continuous industrialization operation, operation, control are conveniently, reliably, can effectively boost productivity and product quality and nodularization effect purposes such as the production of reduction equipment and use cost.
Solution of the present invention is to adopt the tube furnace of graphite material as smelting furnace, establishes injecting type atomizing shaping assembly in the boiler tube bottom; Then establish a low-pressure inert gas air inlet assembly at the body of heater top.The batcher of upper of furnace body is sent into raw meal boiler tube melting chamber, free-fallingly under inert gas shielding is melted simultaneously; its liquation enters nozzle through line hole, pipe; under the effect of nozzle high-pressure inert gas, be atomized into spherical powder, thereby realize its purpose.Therefore, the present invention includes and contain furnace shell and boiler tube, heater and feeder at interior body of heater, water cooling system, nodularization builder; Key is also to be provided with at the body of heater top low-pressure inert gas air inlet assembly; And the nodularization builder is to contain line pipe, interior outer nozzle, high-pressure inert gas air feed chamber, atomizing shaping bucket at interior injecting type atomizing shaping mechanism assembly; Low-pressure gas air inlet assembly is fastened and connected by its inlet chamber and body of heater feed channel, injecting type atomizing shaping mechanism assembly then the line pipe by its shower nozzle tail end with the connection of bottom, boiler tube melting chamber and be fastenedly connected and be integral.Above-mentioned low-pressure inert gas air inlet assembly comprises air inlet pipe and control valve thereof, safety valve, thermo detector and with the be fastened and connected pedestal of all-in-one-piece band four-way inlet chamber of above-mentioned each parts; This pedestal is fastened and connected in body of heater feed channel top by ring flange.And described injecting type atomizing shaping mechanism assembly also is provided with a cooling water cavity and inlet tube and outlet tube thereof at the shower nozzle outer ring surface of this assembly; The side also is provided with a steam vent on atomizing is shaped bucket; Then be provided with the discharging opening of a band valve in its bottom.And described heater both can be intermediate frequency furnace, also can be the direct current graphite-tube resistance furnace; Feeding device then is a screw(-type) feeder.Described outer nozzle both can be annular (seam) nozzle, can also be annular jet rose or single-hole nozzle group.
The present invention is owing to the employing all-sealed structure, and heat fused and spraying shaping under inertia (anti-oxidation) gas shield, and promptly is atomized into spherical powder in raw meal under high-pressure inert gas gas shock effect after fusing.Thereby having whole apparatus structure simplicity of design, compactness, production cost is lower, long service life; It is short to be used to produce spherical casting tungsten carbide powder technological process, production efficiency height, constant product quality, hardness height, characteristics such as particle size uniformity and nodularization are effective, and energy consumption and production cost are low.
Accompanying drawing and description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 reaches and the local enlarged diagram of body of heater annexation for injecting type atomizing shaping mechanism assembly structure;
Fig. 3 is low-pressure inert gas air inlet assembly structure and and body of heater feed system annexation schematic diagram.
Among the figure: 1, material mechanism, 2, low-pressure inert gas air inlet assembly, 2～1, air inlet pipe, 2～2, intake valve, 2～3, thermo detector, 2～4, safety valve; 3, material road, 4, housing, 4～1, cooling water cavity, 5～1,5～2: power supply and cooling water pipe joint group, 6, the melting chamber, 7～1,7～2: the nozzle cooling water inlet tube and outlet tube, 8～1,8～2: high-pressure inert gas is into and out of tracheae, 9, the atomizing bucket that is shaped, 9～1, valve, 9～2, discharging opening, 9～3, steam vent, 9～4, exhaust hole, 9～5, baffle plate, 9～6, cooling water cavity; 10, nozzle cooling water chamber, 11, the high pressure air cavity, 12, shower nozzle, 12～1, inner nozzle, 12～2, outer nozzle, 13, the line pipe, 13～1, the line hole, 14, graphite boiler tube, 15, diamond spar boiler tube, 16, heater (induction coil), 16～1, the coil cooling water cavity.
Embodiment
Present embodiment is that the device of the spherical casting tungsten carbide powder of 350kg/h is an example with production capacity: height overall 6710mm, wherein: the high 1957mm of body of heater; Atomizing shaping bucket 9 high 4430mm, diameter 1400mm.
During present embodiment work, at first boiler tube 14 is heated to 3000 ℃, open low-pressure inert gas intake valve 2～2 and screw(-type) feeder 1 then, under inert gas shielding to the 6 at the uniform velocity feedings of boiler tube melting chamber, powder after melting its high temperature solution through line hole 13～1, the inner chamber of line pipe 13 to inner nozzle 12～1 sprays (stream) go out, meanwhile high-pressure inert gas is through outer nozzle 12～2 ejection and make nozzle profile become a negative pressure vortex, high temperature WC liquid a fluid stream turbulent flow at a high speed impact and suction function under, in atomizing is shaped bucket 9, be atomized into spherical fine powder; At the bottom of being deposited on after the cooling barrel.Time opening valve (plate) 9～1, powder promptly gets object through discharging opening 9～2 outputs through screening; Inert gas then enters through steam vent 9～3 and recycles after dust separator purifies in the bucket, and isolated spherical fine powder is incorporated into as object in the finished product of corresponding granularity.
Claims (5)
1, a kind of device that adopts the atomizing shaping to produce spherical casting tungsten carbide powder; Comprise the body of heater that contains furnace shell and boiler tube, heater and feeder, water cooling system, nodularization builder; It is characterized in that also being provided with a low-pressure inert gas air inlet assembly at the body of heater top; And the nodularization builder is to contain beam tube, inner and outer nozzles, high-pressure inert gas air feed chamber, atomizing shaping bucket at interior injecting type atomizing shaping mechanism assembly; Low-pressure gas air inlet assembly is fastened and connected by its inlet chamber and body of heater feed channel, injecting type atomizing be shaped mechanical assembly then the line pipe by its shower nozzle tail end with the connection of bottom, boiler tube melting chamber and be fastenedly connected and be integral.
2, press the device of the spherical casting tungsten carbide powder of the described production of claim 1; It is characterized in that described low-pressure inert gas air inlet assembly comprises air inlet pipe and control valve thereof, safety valve, thermo detector and with the be fastened and connected pedestal of all-in-one-piece band four-way inlet chamber of above-mentioned each parts; This pedestal is fastened and connected in body of heater feed channel top by ring flange.
3, press the device of the spherical casting tungsten carbide powder of the described production of claim 1; It is characterized in that described injecting type atomizing shaping mechanism assembly, also be provided with a cooling water cavity and inlet tube and outlet tube thereof at the shower nozzle outer ring surface of this assembly; The side also is provided with a steam vent on atomizing is shaped bucket; Then be provided with the discharging opening of a band valve in its bottom.
4, press the device of the spherical casting tungsten carbide powder of the described production of claim 1; It is characterized in that described heater both can be intermediate frequency furnace, also can be the direct current graphite-tube resistance furnace; Feeding device then is a screw(-type) feeder.
5, press the device of the spherical casting tungsten carbide powder of the described production of claim 1; It is characterized in that described outer nozzle both can be a nozzle ring, can also be annular jet rose or single-hole nozzle group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03117990 CN1274445C (en) | 2003-06-02 | 2003-06-02 | Atomizing formation apparatus for producing spherical casting WC powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03117990 CN1274445C (en) | 2003-06-02 | 2003-06-02 | Atomizing formation apparatus for producing spherical casting WC powder |
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| Publication Number | Publication Date |
|---|---|
| CN1486806A CN1486806A (en) | 2004-04-07 |
| CN1274445C true CN1274445C (en) | 2006-09-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 03117990 Expired - Fee Related CN1274445C (en) | 2003-06-02 | 2003-06-02 | Atomizing formation apparatus for producing spherical casting WC powder |
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| CN (1) | CN1274445C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2812290C1 (en) * | 2023-06-22 | 2024-01-29 | Федеральное государственное автономное образовательное учреждение высшего образования "Национальный исследовательский Томский политехнический университет" | Device for producing tungsten carbide powder |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101863464B (en) * | 2009-11-27 | 2012-09-05 | 洛阳市冠奇工贸有限责任公司 | Air-flow vortex balling machine for producing spherical graphite |
| CN104418324A (en) * | 2013-08-22 | 2015-03-18 | 自贡长城硬面材料有限公司 | Vertically cast tungsten carbide continuous production furnace and vertically cast tungsten carbide continuous production technology |
| CN104627695A (en) * | 2015-02-02 | 2015-05-20 | 苏州化联高新陶瓷材料有限公司 | Charging system of continuous production high-temperature resistance furnace |
| RU2644483C2 (en) * | 2016-07-21 | 2018-02-12 | Руслан Алексеевич Шевченко | Method of producing spherical powder of tungsten monocarbide wc |
| CN107022114B (en) * | 2017-05-26 | 2018-12-07 | 成都新柯力化工科技有限公司 | A kind of ultra-high molecular weight polyethylene special graphite alkene microballoon mother material and preparation method |
| WO2019014914A1 (en) * | 2017-07-21 | 2019-01-24 | Linde Ag | A nozzle arrangement for fusing powdered material |
| CN107457408A (en) * | 2017-10-19 | 2017-12-12 | 沈阳真空技术研究所 | The sensing atomization of continous way cold crucible prepares titanium valve equipment |
| CN109301995B (en) * | 2018-10-08 | 2024-05-03 | 宁波虎渡能源科技有限公司 | Direct-drive atomizer |
-
2003
- 2003-06-02 CN CN 03117990 patent/CN1274445C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2812290C1 (en) * | 2023-06-22 | 2024-01-29 | Федеральное государственное автономное образовательное учреждение высшего образования "Национальный исследовательский Томский политехнический университет" | Device for producing tungsten carbide powder |
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| Publication number | Publication date |
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| CN1486806A (en) | 2004-04-07 |
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