CN102092714A - Fine grain casting tungsten carbide continuous production furnace - Google Patents
Fine grain casting tungsten carbide continuous production furnace Download PDFInfo
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- CN102092714A CN102092714A CN2011100055388A CN201110005538A CN102092714A CN 102092714 A CN102092714 A CN 102092714A CN 2011100055388 A CN2011100055388 A CN 2011100055388A CN 201110005538 A CN201110005538 A CN 201110005538A CN 102092714 A CN102092714 A CN 102092714A
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Abstract
The invention relates to a fine grain casting tungsten carbide continuous production furnace. The production furnace is divided into three parts, namely a feeding device, an upper furnace body and a lower furnace body. the integral structure of the production furnace is a vertical structure. The production furnace contains the feeding device, the upper furnace body, a conical throwing disk, the lower furnace body, a discharging pipe, a gas inlet nozzle and an observation pipe. The production furnace is characterized in that the inside of the upper furnace body is provided with a round graphite crucible with a central small hole at the bottom; and the conical throwing disk is arranged below the graphite crucible, the conical throwing disk is near the graphite crucible and performs high-speed circular motion around the axis, and the axis is parallel to the central vertical line of the graphite crucible to maintain a proper horizontal distance. Under the centrifugal force of the conical throwing disk, the solution is broken to tiny particles and the tiny particles are thrown on the inner wall of a water-cooled sandwich cylinder, thus the high temperature solution can be fast cooled and the fine grain casting tungsten carbide product with fine grains can be obtained; and the production furnace has high cooling speed, low degree of oxidation of material, low energy consumption and high yield, and can be used to realize continuous production operation.
Description
Technical field
The present invention relates to a kind of thin brilliant cast tungsten carbide continuous production stove, the particularly a kind of thin brilliant cast tungsten carbide continuous production stove that can realize preparing continuously fine grained texture's structure cast tungsten carbide technology in cemented carbide industry.
Technical background
At present, in cemented carbide industry, produce cast tungsten carbide and generally all adopt horizontal carbon tube furnace, tungsten powder and tungsten carbide powder compound are contained in the boat, adopt the mode of a boat of each heating, boat is placed horizontal carbon tube furnace, compound forms cast tungsten carbide solution after being heated to liquid state, then boat is released outside the stove, by the high temperature cast tungsten carbide solution disposal pouring of operator about following 2800 of atmospheric environment degree in cooling vessel, obtain the cast tungsten carbide product after the cooling, facts have proved, this disposal pouring mode makes solution form the bigger block of volume in cooling vessel, cause cast tungsten carbide solution speed of cooling slow, the cast tungsten carbide product crystalline phase that obtains after the cooling is the dendritic crystalline-granular texture of fat tree (i.e. " a coarse-grain cast tungsten carbide "), rather than the thin brilliant cast tungsten carbide of fine grained structure shape, is not suitable for doing high-end stiff dough spray material.In addition, also there are shortcomings such as labor condition is poor, the material oxidation is serious in this heating at intermittence, the outer pouring type of stove.
Summary of the invention
The objective of the invention is to overcome above-mentioned defective, provide that a kind of speed of cooling is fast, labor condition good, the material degree of oxidation is little, energy consumption is low, output is high, can realize the thin brilliant cast tungsten carbide continuous production stove of continuous production operation.
Technical scheme of the present invention: a kind of thin brilliant cast tungsten carbide continuous production stove, comprise feeding unit, upper furnace body, tapered dish, lower furnace body, discharge nozzle, admission piece and the observation tube of getting rid of, feature is the circular plumbago crucible that is provided with bottom band central small hole in the vertical heat tunnel of upper furnace body; Be provided with an eccentric taper of making circumferential motion around axis that is used to increase linear velocity in the lower furnace body and get rid of dish, be that eccentric taper is got rid of dish and is arranged on the vertical heat tunnel of body of heater below, this gets rid of has certain horizontal throw between the central axis of the axis of dish and plumbago crucible and is parallel to each other, two axial lines is provided with certain distance and makes that to get rid of dish eccentric, its objective is by increasing whereabouts liquid and the speed of rotation of getting rid of Pan Jiechudianchu, the liquid that causes to fall and break obtains enough kinetic energy when dish is got rid of in percussion, increase linear velocity, be convenient to the broken and dispersion of liquid.
The lower furnace body shell is the interlayer water-cooling structure, and lower furnace body top is cylindrical tube, and the bottom is a divergent-cone wall, and cylinder lateral wall is provided with the observation tube of bringing valve into, and the divergent-cone wall bottom centre position is provided with the discharge nozzle outside stove.
This continuous production stove is divided into feeding unit, upper furnace body, lower furnace body three parts from top to down.One-piece construction is a vertical structure, and production work is made as continuously-running duty.Its feeding unit is responsible for continuously, evenly, controllably the plumbago crucible in upper furnace body provides furnace charge; Upper furnace body is responsible for and will is placed the furnace charge of high-temperature zone plumbago crucible to be heated to liquid state, makes its formation have the cast tungsten carbide solution of WC+W2C eutectic structure, and solution continuously drops to cooling segment from plumbago crucible bottom small opening; Lower furnace body is responsible for the fallen solution of upper furnace body being quickly cooled to technological temperature and sending outside the stove.Be provided with a taper of making circumferential motion around axis in the lower furnace body and get rid of dish; This axis is parallel with the plumbago crucible central axis and keep a suitable horizontal throw; Taper is got rid of dish and is located at the vertical heat tunnel of plumbago crucible below and installs near plumbago crucible, and it is adjustable that the rotating speed of dish is got rid of in taper;
The production process of this continuous production stove: tungsten powder and tungsten carbide powder mixture charge drop in the crucible continuously, equably through cutting agency, are heated to liquid state in crucible sequentially, form to have WC+W
2The cast tungsten carbide solution of C eutectic structure, solution flows out from the crucible bottom aperture and gets rid of on the dish with the taper around the axis high speed rotating that the freely falling body form drops in the lower furnace body, get rid of the centrifugal action of dish by taper, solution is fractured into fine particle and is thrown on the inwall of lower furnace body water-cooled interlayer cylindrical shell, fall outside the stove from bottom divergent-cone wall discharge nozzle along cylinder inboard wall then, thereby realized the quick cooling of pyrosol, obtain the tiny thin brilliant cast tungsten carbide product of crystal grain, above-mentioned continuously feeding, dissolve, process of cooling has realized continuous production processes.
Gordian technique of the present invention is: a kind of type of cooling to the high-temp liquid that falls from plumbago crucible (be melting do pot); Its innovative point is: below plumbago crucible, be provided with one near plumbago crucible, around axis make the high speed circumferential motion, this axis is parallel with plumbago crucible center vertical line and keep the taper of a suitable horizontal throw to get rid of dish.The centrifugal action that gets rid of dish by taper is broken into fine particle with solution and is thrown on the inwall of water-cooled interlayer cylindrical shell, thereby has realized the quick cooling of pyrosol, obtains the tiny thin brilliant cast tungsten carbide product of crystal grain; This production stove speed of cooling is fast, the material degree of oxidation is little, energy consumption is low, output is high, can realize the continuous production operation.
Description of drawings
Accompanying drawing is a structural representation of the present invention;
Among the figure: 1-upper furnace body, 2-cast tungsten carbide solution, 3-plumbago crucible, the tapered dish that gets rid of of 4-, 5-lower furnace body, 6-discharge nozzle, 7-admission piece, 8-observation tube, 31-center vertical line, 41-axis.
Embodiment:
Referring to above-mentioned accompanying drawing, a kind of thin brilliant cast tungsten carbide continuous production stove comprises feeding unit, upper furnace body 1, tapered dish 4, lower furnace body 5, discharge nozzle 6, admission piece 7, the observation tube 8 of getting rid of; Be provided with the circular plumbago crucible 3 of bottom band central small hole in this upper furnace body 1 vertical heat tunnel; Be provided with an eccentric taper of making circumferential motion around axis 41 that is used to increase linear velocity in the lower furnace body 5 and get rid of dish 4, be that eccentric taper is got rid of dish 4 and is arranged on the vertical heat tunnel of body of heater 1 below, this gets rid of has certain horizontal throw between the central axis 31 that coils 4 axis 41 and plumbago crucible 3 and is parallel to each other.Eccentric taper is got rid of dish 4 and is located at plumbago crucible 3 vertical channels below and installs near plumbago crucible 3, and it is adjustable that the rotating speed of dish 4 is got rid of in taper;
Lower furnace body 5 shells are the interlayer water-cooling structure, and lower furnace body 5 tops are cylindrical tube, and the bottom is a divergent-cone wall, and cylinder lateral wall is provided with the observation tube 8 of bringing valve 7 into, and the divergent-cone wall bottom centre position is provided with the discharge nozzle 6 outside stove.
Production process: tungsten powder and tungsten carbide powder mixture charge drop in the crucible 3 continuously, equably through cutting agency, are heated to liquid state in crucible 3 sequentially, form to have WC+W
2The cast tungsten carbide solution 2 of C eutectic structure, solution 2 flows out from the crucible bottom aperture and gets rid of on the dish 4 with the taper around axis 41 high speed rotating that the freely falling body form drops in the lower furnace body, get rid of the centrifugal action of dish 4 by taper, solution 2 is fractured into fine particle and is thrown on the inwall of lower furnace body 5 water-cooled interlayer cylindrical shells, fall outside the stove from bottom divergent-cone wall discharge nozzle 6 along cylinder inboard wall then, thereby realized the quick cooling of pyrosol, obtain the tiny thin brilliant cast tungsten carbide product of crystal grain, above-mentioned continuously feeding, dissolve, process of cooling has realized continuous production processes.
Claims (2)
1. one kind thin brilliant cast tungsten carbide continuous production stove comprises feeding unit, upper furnace body (1), tapered dish (4), lower furnace body (5), discharge nozzle (6), admission piece (7), the observation tube (8) of getting rid of, and it is characterized in that:
Be provided with the circular plumbago crucible (3) of bottom band central small hole in the vertical heat tunnel of described upper furnace body (1);
Be provided with an eccentric taper of making circumferential motion around axis (41) that is used to increase linear velocity in the described lower furnace body (5) and get rid of dish (4), be that eccentric taper is got rid of dish (4) and is arranged on the vertical heat tunnel of upper furnace body (1) below, this gets rid of has certain horizontal throw between the central axis (31) of the axis (41) of dish (4) and plumbago crucible (3) and is parallel to each other.
2. thin brilliant cast tungsten carbide continuous production stove as claimed in claim 1, it is characterized in that described lower furnace body (5) shell is the interlayer water-cooling structure, lower furnace body (5) top is cylindrical tube, the bottom is a divergent-cone wall, cylinder lateral wall is provided with the observation tube (8) of bringing valve (7) into, and the divergent-cone wall bottom centre position is provided with the discharge nozzle (6) outside stove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2011100055388A CN102092714A (en) | 2011-01-12 | 2011-01-12 | Fine grain casting tungsten carbide continuous production furnace |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011100055388A CN102092714A (en) | 2011-01-12 | 2011-01-12 | Fine grain casting tungsten carbide continuous production furnace |
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| CN102092714A true CN102092714A (en) | 2011-06-15 |
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| CN2011100055388A Pending CN102092714A (en) | 2011-01-12 | 2011-01-12 | Fine grain casting tungsten carbide continuous production furnace |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07166212A (en) * | 1993-12-09 | 1995-06-27 | Teikoku Piston Ring Co Ltd | Production and apparatus for production of flat metallic powder |
| JPH1129801A (en) * | 1997-07-10 | 1999-02-02 | Alps Electric Co Ltd | Conductive alloy powder, its production, conductive paste using the conductive alloy powder, and electronic equipment |
| CN1314224A (en) * | 2000-03-21 | 2001-09-26 | 贵研铂业股份有限公司 | Method and equipment for preparing noble metal and its alloy powder |
| JP2010209409A (en) * | 2009-03-10 | 2010-09-24 | Nec Tokin Corp | Method for producing amorphous soft magnetic alloy powder, amorphous soft magnetic alloy powder, and formed body using the same |
| CN101912974A (en) * | 2010-08-27 | 2010-12-15 | 株洲弗拉德科技有限公司 | Vertical superhigh-temperature continuous balling furnace |
| CN202008292U (en) * | 2011-01-12 | 2011-10-12 | 株洲弗拉德科技有限公司 | Continuous production furnace of fine-grained cast tungsten carbide |
-
2011
- 2011-01-12 CN CN2011100055388A patent/CN102092714A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07166212A (en) * | 1993-12-09 | 1995-06-27 | Teikoku Piston Ring Co Ltd | Production and apparatus for production of flat metallic powder |
| JPH1129801A (en) * | 1997-07-10 | 1999-02-02 | Alps Electric Co Ltd | Conductive alloy powder, its production, conductive paste using the conductive alloy powder, and electronic equipment |
| CN1314224A (en) * | 2000-03-21 | 2001-09-26 | 贵研铂业股份有限公司 | Method and equipment for preparing noble metal and its alloy powder |
| JP2010209409A (en) * | 2009-03-10 | 2010-09-24 | Nec Tokin Corp | Method for producing amorphous soft magnetic alloy powder, amorphous soft magnetic alloy powder, and formed body using the same |
| CN101912974A (en) * | 2010-08-27 | 2010-12-15 | 株洲弗拉德科技有限公司 | Vertical superhigh-temperature continuous balling furnace |
| CN202008292U (en) * | 2011-01-12 | 2011-10-12 | 株洲弗拉德科技有限公司 | Continuous production furnace of fine-grained cast tungsten carbide |
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Application publication date: 20110615 |