CN1160841A - Vacuum forming technology for lining plate of heat-resisting steel hanging used inside cement kiln - Google Patents
Vacuum forming technology for lining plate of heat-resisting steel hanging used inside cement kiln Download PDFInfo
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- CN1160841A CN1160841A CN 96103310 CN96103310A CN1160841A CN 1160841 A CN1160841 A CN 1160841A CN 96103310 CN96103310 CN 96103310 CN 96103310 A CN96103310 A CN 96103310A CN 1160841 A CN1160841 A CN 1160841A
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Abstract
The said technology produces one casting for kiln tail clinker preheating decomposer via vacuum forming process, and aims at solving the problem in producing the said casting via available technological process. The present invention features that by means of vacuum sealed forming method, the whole set of production process including parting plane, pattern plate, evacuating passage, casting system, etc. is determined. The present invention makes it possible to produce the said casting suitable for cement clinker production in the scale of 300-8,000 tons every day.
Description
The technical field of the invention is pre-thermal decomposer of clinker new type dry kiln tail and vacuum sealed molding, and the former is a capital equipment during manufacture of cement is equipped in the cement industry, and the latter is a kind of physics formative method in the casting industry.
The production of clinker divides wet method and dry method two classes, and wet method is to add water mill to make slurry in cement raw material, and then through long kiln mature calcined material.Dry production is by pre-thermal decomposer raw material to be carried out predecomposition, enters the kiln mature calcined material then, and this technology is the technology of high-efficiency and energy-saving type, at present this explained hereafter of the about 70-80% of China's manufacture of cement total amount.This technology key is to improve heat exchanger effectiveness, utilize kiln tail waste heat to reach energy-conservation and raising output, therefore adopting pre-pyrolysis technique calcination of chamotte, this technology is the advanced technologies that is developing of world today's clinker production, as Ji Dong cement plant, Hebei, Huaneng Group, Dalian--cement plant, little wild field.
The pre-thermal decomposer inner core lining of clinker dry method kiln tail is the critical component of pre-thermal decomposer, makes with heat-resistance stainless steel, monoblock type is arranged and hang the liner plate chip, need change every 1-2 approximately according to its operating position.Monoblock type is to make its shortcoming with corrosion resistant plate welding: need with CUT old tube to be slit into fritter when (1) is changed and take out, sever the preheater heat-insulation layer new tube that welding makes of just packing into then, the maintain and replace expense height of wasting time and energy; (2) corrosion resistant plate high temperature resistance abrasive wear energy force rate heat resisting steel is poor; Steel plate consumption is big when (3) making, the cost height.Hanging the liner plate chip is to use the heat resisting steel foundry goods, its advantage: (1) installation, maintenance, time saving and energy saving saving money when changing; (2) life-span is long.But casting dimension deviation, surface smoothness, inherent quality are had relatively high expectations.
Adopt resin sand, water-glass sand and clay-bonded sand formative technology to produce if hang liner plate chip heat resisting steel foundry goods, then have following shortcoming: the shortcoming that adopts phenolic sand molding: (1) is owing to making binding agent with a large amount of resins, so the production cost height; (2) owing to need complete resin sand reclaim equiment, equipment investment is big; A large amount of resins burnings when (3) pouring into a mould, contaminated environment; (4) coating sprays acute thickness and directly influences the casting dimension deviation; (5) foundry goods easily produces pore.Adopt the shortcoming of sodium silicate molding: (1) is owing to making binding agent with a large amount of waterglass, so production cost is higher; (2) water-glass sand regeneration cost height; (3) coating spary thickness directly influences the casting dimension deviation; (4) foundry goods easily produces hot tearing, gas hole defect; (5) cast cleaning difficulty.Adopt the shortcoming of clay-bonded sand moulding: (1) needs mould drying equipment, wastes energy, productivity ratio is low; (2) casting mold is yielding when oven dry, so the casting dimension deviation is big, is difficult to guarantee the casting quality requirement; (3) coating spary thickness directly influences the casting dimension deviation; (4) foundry goods easily produces pore.
The close moulding of vacuum seal is different with traditional formative method, the sand that moulding is used is binder free, moisture and accrete dry sand, the top and bottom diaphragm seal of sandbox, vacuumize by in the sandbox, make dry sand that is sealed in sandbox form casting mold, its advantage is: (1) casting dimension deviation is little, clear-cut, any surface finish; (2) owing to moisture-free and binding agent in the molding sand, and vacuumize state, be difficult for producing defectives such as pore; (3) the coating spary is on film and molding sand contact-making surface, and its thickness can not influence the casting dimension deviation; (4) join sand, mulling, oven dry casting mold, vibrating shakeout cleaning owing to save molding sand, molding sand does not need binding agent and additives again, so save power and raw material; (5) equipment is simple, and investment cost is less.Its shortcoming: (1) owing to the restriction that is subjected to the current thin film extension property, during the foundry goods of production geometry more complicated, the selection of casting mold die joint is extremely important; (2) too slow for preventing poring rate, film roasted by molten metal for a long time or poring rate too fast, cause the molten metal splash, so scaling loss film at a distance is having relatively high expectations to its Design of Runner System; (3) since during casting of molten metal film can be to continue to keep the certain vacuum of casting mold by scaling loss, need the coating of certain kind of brushing and thickness; (4) need correctly carry out die joint selection, Design of Runner System, coating type, steam vent position and size, selection of process parameters such as pouring temperature according to the characteristics of vacuum sealed molding.
The objective of the invention is to use the vacuum sealed molding method, produce the pre-thermal decomposer inner core of the clinker dry method lining plate of heat-resisting steel hanging foundry goods that is suitable for daily output 300-8000 ton series, formulate rational casting production process, produce series of products in high quality.
Fig. 1 of the present invention is the cope match-plate pattern vertical view, among the figure: 1--and template case dowel hole; 2--and template case fixing hole; 3--hangs lining plate extreme higher position apperance; The last baffle plate of 4--; The 5--aperture of bleeding; The 6--cross gate; 7--sprue seat; The 8--ingate; The recessed apperance of 9--; 10--steam vent seat; The 11--exhaust passage.Fig. 2 is the A-A cutaway view of cope match-plate pattern, and among the figure: the recessed apperance of 12--realizes rising pouring; 13--assists aspirating hole; 14--thickening model base plate; 15--concentrates aspirating hole; The 16--back-up block; Fig. 3 is the B-B view of cope match-plate pattern, among the figure: the 17--groove of bleeding; 18--groove and apperance Edge Distance; 19--apperance groove and apperance Edge Distance.Fig. 4 is the C-C view of cope match-plate pattern, among the figure: the 20--running gate system apperance groove of bleeding; 21--groove and apperance Edge Distance.Fig. 5 is the lower bolster vertical view, and among the figure: 22--forms and hangs lining plate hanging hook groove fuse apperance; 23--forms and hangs lining plate hanging hook fuse apperance.Fig. 6 is the D-D cutaway view of lower bolster, among the figure: baffle plate under the 24--; Epirelief apperance in the middle of the 25--; 26--epirelief apperance; The epirelief apperance that 27--is big; 28--epirelief apperance realizes rising pouring; 29--concentrates aspirating hole greatly; 30--concentrates aspirating hole; The 31--back-up block.
Technical scheme content of the present invention comprises: Fig. 1 to Fig. 6 stencil design, upper and lower mould base plate (4) (14) (24), baffle plate and template block location (1) and fixing (2), determine curved surface die joint such as Fig. 2, shown in Figure 6, apperance is located and is fixed on the upper and lower mould base plate respectively up and down, no apperance place or recessed apperance place offer the aperture of bleeding (5) on baffle plate, on epirelief apperance and baffle plate contact-making surface, offer the groove of bleeding (17) (20), and on baffle plate, offer concentrated aspirating hole (15) (29) (30) with the groove place of communicating of bleeding, open or the semi open model running gate system (6) (7) (8) of bottom filling is set, hanging lining plate extreme higher position (3) and steam vent (10) (11) is being set away from the running gate system place, fuse formation is set hangs the hanging hook of lining plate and the inner surface of groove (22) (23), select the thick hot-stretch film of 0.05-1.5mm for use, behind the model overlay film, the fast dried fireproof coating of the thick zirconium English of spary 1.1-3mm powder, it is the dry sand of 0.074-0.21mm that moulding sand is selected sand grains for use, add the microseism of sand limit in the bumper top, baffle plate case and sandbox vacuumize＜the 0.05MPa moulding, last nowel with moulding carries out mould assembling again, continue to vacuumize moulding, big cup is set, waters temperature for 1500-1700 ℃.
The die joint that the present invention determines is that it is by hanging the curved surface die joint of lining plate lower surface and lower end hanging hook groove upper surface, (Fig. 2, Fig. 6) make two fuses (22) (23) of this lacing film foundry goods all be placed on mo(u)ld bottom half easily, foundry goods volume about 80% forms in drag box, and model can both intact overlay film moulding up and down.
The present invention offers (9) (12) on no apperance place on the baffle plate or recessed apperance horizontal plane diameter and is the Φ 0.5-2mm aperture (5) of bleeding, and the pitch of holes of offering the aperture of bleeding in its knee is 5-30mm, and remaining pitch of holes is 30-100mm.When baffle plate was thick, beating diameter earlier from the back side was 4-10mm hole (13), spiles again.
The present invention with the epirelief apperance of baffle plate joint face on (3) (25) (26) (27) (28) comprise ingate (8), cross gate (6), sprue seat (7), steam vent seat (10) (11), core print seat (22) (23), offer the groove of bleeding (17) (20), the general 2-10mm in the slot trough apperance of bleeding edge (18) (19) (21), ditch groove depth 1-10mm, ditch groove width 10-30mm.On baffle plate, offer diameter for Φ 3-30mm concentrates aspirating hole (15) (29) (30), be connected and fixed with nail or screw at punch sample and baffle plate with the groove place of communicating.
The present invention offers running gate system at the lowest part of the hanging hook of hanging lining plate, realizes rising pouring (12).Ingate is introduced the position, makes more molten metal tilt to rise and fills type (27).Offer the running gate system of open or semi open model, each constituent element sectional area ratio is: ∑ F sprue: ∑ F cross gate: ∑ F ingate=1: (0.8-1.1): (1.2-2).It is 5-12 second that the minimum sectional area of running gate system is controlled the duration of pouring.
The present invention is hanging liner plate lacing film extreme higher position (3) and away from the running gate system place, is offering steam vent (10) (11), and the sectional area of steam vent is 1/2-1 a times of running gate system minimum sectional area.
The present invention is provided with two fuses and forms the inner surface (22) (23) of hanging lining plate hanging hook and hanging hook groove.Fuse is designed to the self-hardening resin core, its prescription: (the acid: 0.4%+ silane KH550 0.0036% (except that dry sand, other is to account for the dry sand amount) alcohol=6.5: 3.5) of dry sand 100%+ liquid phenolic resin F7001.8%+ p-methyl benzenesulfonic acid alcoholic solution.
The present invention selects the ethylene-vinyl acetate EVA hot-stretch film (abbreviating EVA as) of 0.005-1.5mm for use, is heated to 100-150 ℃ and makes soften film and cover upper and lower apperance, and the baffle plate case vacuumizes＜0.05MPa.
The present invention is the fast dried fireproof coating of spary zirconium English powder on film that covers mould and fuse, and spary thickness is 1.1-3mm.
Add the microseism of sand limit in the bumper top during moulding of the present invention, vibration frequency is 1500-3000 time/minute, and then adds cover film.
Quartz sand, chromite sand, magnesia, 70 sand, zircon sand, the olivine sand of 0.074-0.21mm is selected in moulding of the present invention for use.
Pouring temperature of the present invention is controlled at 1500-1700 ℃, and smallclothes are got the lower limit of pouring temperature, big part capping.
Advantage of the present invention:
(1) produced to hang the lining plate size accurate: the heat resisting steel foundry goods generally all answer general casting method such as spary fireproof coating, resin sand, water-glass sand, clay-bonded sand all with the coating spary at the casting mold inner face, the varied in thickness of coating directly influences casting dimension.But the coating spary of vacuum sealed molding on film and molding sand face, the how thick casting dimension that do not influence of paint thickness.Need not model of vibration during the vacuum sealed molding molding in addition, the molding gradient is little, so casting dimension is accurate.
That (2) is produced hangs the lining plate clear-cut, any surface finish: because casting mold is in vacuum state, help liquid metal filling during cast, and the fast dried fireproof coating of spary certain thickness zirconium English powder simultaneously, thus the foundry goods clear-cut, any surface finish.
(3) lining plate of being produced of hanging does not have gas hole defect: owing to do not contain moisture, binding agent in the molding sand, cooperate the fuse of self-hardening resin sand, especially casting mold is in vacuum state, has overcome general casting method forms gas hole defect easily at the fuse place problem.
(4) originally hang the die joint that the lining plate foundry goods is determined, easily fuse is placed on mo(u)ld bottom half, foundry goods volume majority is placed in the drag box and forms, and model can both intact overlay film moulding up and down.
(5) the mould plate manufacturing is simple, overlay film is effective: the bleed-off passage design of baffle plate and apperance, and make the manufacturing of baffle plate and apperance simple, simultaneously effective at the overlay film of edge.
(6) realize that hanging the lining plate quick and stable fills type: the introducing position of running gate system realizes that molten metal inclination bottom filling fills type, make the foundry goods of this flat type, sandbox tiltedly need not be put, just realize tilting to fill type, each group element ratio of running gate system is selected, the filling time of minimum sectional area control has realized that quick and stable fills type.
(7) the casting wasted product rate of Sheng Chaning is low: because the duration of pouring and temperature, the model aspirating hole of having selected this curved surface die joint, running gate system to introduce position, each group element ratio, control in hanging the production of lining plate cast casting are provided with, selection, stenciling coating kind and the thickness of position, exhaust passage and area, film, fuse design, moulding make the percent defective of hanging lining plate of production low with sand and moulding vibrations.
(8) it is low originally to hang the cost of lining plate: but because moulding is simple without binding agent, sand preparing system with sand, the molding sand reuse 95% or more, the casting falling sand cleaning is simple, percent defective is low, low equipment investment, production run expense are low, so production to hang the lining plate cost low.
Figure of description explanation of the present invention: Fig. 1 is the cope match-plate pattern vertical view, and Fig. 2 is the A-A cutaway view of cope match-plate pattern, and Fig. 3 is the B-B view of cope match-plate pattern, and Fig. 4 is the C-C view of cope match-plate pattern, and Fig. 5 is the lower bolster vertical view, and Fig. 6 is the D-D cutaway view of lower bolster.
The present invention produces the vacuum sealing moulding technique of 4000 tons of cement kiln lining plate of heat-resisting steel hanging daily:
(1) die joint determines as Fig. 2 curved surface die joint shown in Figure 6.
(2) offering diameter on no apperance place or the recessed apperance horizontal plane on the baffle plate is Φ 1mm aspirating hole; Pitch of holes is 10mm in recessed apperance corner, and all the other are 50mm.
(3) on the punch sample face that is connected with baffle plate, comprise ingate, cross gate, sprue seat and steam vent seat, offer the ditch groove width 15mm that bleeds, dark 4mm, slot trough apperance edge 5mm.
(4) offer concentrated passage at baffle plate with the groove place of communicating, be two kinds of Φ 10mm and Φ 20mm.
(5) each constituent element sectional area ratio ∑ F sprue of running gate system: ∑ F cross gate: ∑ F ingate=1: 0.9: 1.2, it is 8-10 second that the cross gate area is controlled the duration of pouring.
(6) sectional area of steam vent is 1/2 times of cross gate sectional area.
(7) the spray paint THICKNESS CONTROL is at about 2mm.
(8) select the thick eva film of about 0.2mm for use.
(9) the electromagnetic shaker vibration frequency is 1500 times/minute.
(10) select the natural siliceous sand of 0.105-0.21mm for use.
(11) pouring temperature is controlled at 1530-1580 ℃.
The present invention produces the vacuum sealing moulding technique of 2000 tons of cement kiln lining plate of heat-resisting steel hanging daily:
(1) die joint determines as Fig. 2, curved surface die joint shown in Figure 6.
(2) offering diameter on no apperance place or the recessed apperance horizontal plane on the baffle plate is Φ 0.8mm aspirating hole; Pitch of holes is 8mm in recessed apperance corner, and all the other are 40mm.
(3) on the punch sample face that is connected with baffle plate, comprise ingate, cross gate, sprue seat and steam vent seat, offering the ditch groove width of bleeding is 12mm, dark 4mm, and slot trough apperance edge is 4mm.
(4) offering diameter at baffle plate with the groove place of communicating is that 15mm concentrates passage.
(5) each constituent element sectional area ratio ∑ F sprue of running gate system: ∑ F cross gate: ∑ F ingate=1: 1.1: 1.4, it is 6-8 second that the sprue area is controlled the duration of pouring.
(6) sectional area of steam vent is identical with the sprue sectional area.
(7) the spray paint THICKNESS CONTROL is at about 1.5mm.
(8) select the thick eva film of about 0.1mm for use.
(9) the electromagnetic shaker vibration frequency is 3000 times/minute.
(10) select the chromite sand of 0.105-0.21mm for use.
(11) pouring temperature is controlled at 1500-1550 ℃.
Claims (7)
1, cement kiln vacuum forming technology for lining plate of heat-resisting steel hanging used inside, it is characterized in that the die joint of hanging lining plate is defined as it by hanging the curved surface die joint of lining plate lower surface and lower end hanging hook groove upper surface, cut apart by its die joint and to hang lining plate and manufacture upper and lower apperance respectively, it is separately fixed on the upper and lower baffle plate; With upper and lower baffle plate and baffle plate case positioning and fixing, in the no apperance place or recessed apperance horizontal plane of baffle plate, offer the hole diameter 0.5-2mm that bleeds, offer the groove of bleeding in epirelief apperance and baffle plate contact-making surface, slot trough apperance edge is 2-10mm, and the place that is connected with the groove of bleeding on baffle plate offers concentrated aspirating hole again, diameter is 3-30mm, and the open or semi open model running gate system of bottom filling is set.Select the hot-stretch film of thickness 0.05-1.5mm for use, being heated to 100-150 ℃ makes soften film and covers upper and lower apperance, the fireproof coating layer that spary 1.1-3mm is thick on its film surface, filling dry sand granularity is 0.21-0.074mm in sandbox, vibrations and respectively baffle plate case and sandbox vacuumize＜the 0.05MPa moulding, the fuse that forms hanging hook and hanging hook groove is positioned over the mo(u)ld bottom half position, the last drag box with moulding carries out mould assembling again, big cup is set, continues to vacuumize moulding.
2, vacuum sealing moulding technique according to claim 1 is characterized in that no apperance place offers aspirating hole on the baffle plate, and the aspirating hole aperture that its pitch of holes is offered in the knee is 5-30mm, and other parts are 30-100mm; On epirelief apperance and the baffle plate contact-making surface, comprise ingate, cross gate, the sprue seat, steam vent seat epirelief apperance is offered the groove of bleeding, and is 2-10mm apart from the apperance edge, ditch groove depth 1-10mm, ditch groove width 10-30mm.
3, according to claim 1,2 described vacuum sealing moulding techniques, it is characterized in that hanging the lining plate extreme higher position and, offer steam vent away from the running gate system place, the steam vent sectional area is 1/2～1 times of running gate system minimum sectional area.
4, according to claim 1,2 described vacuum sealing moulding techniques, the lowest part that it is characterized in that hanging the hanging hook of lining plate is offered running gate system, sprue, the section ratio of cross gate and ingate is 1: (0.8～1.1): (1.2～2), the minimum sectional area of running gate system is for controlling pouring temperature in the time of 1500-1700 ℃, and be 5～12 seconds the duration of pouring.
5, vacuum sealing moulding technique according to claim 1 is characterized in that the ethylene-vinyl acetate EVA hot-stretch film of selecting for use 0.05～1.5mm thick.
6, vacuum sealing moulding technique according to claim 1 is characterized in that the fast dried fireproof coating of zirconium English powder of spary 1.1-3mm behind the model overlay film.
7,, it is characterized in that vibration frequency 1500-3000 time/minute of moulding according to the described vacuum sealing moulding technique of claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96103310 CN1099576C (en) | 1996-03-29 | 1996-03-29 | Vacuum forming technology for lining plate of heat-resisting steel hanging used inside cement kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96103310 CN1099576C (en) | 1996-03-29 | 1996-03-29 | Vacuum forming technology for lining plate of heat-resisting steel hanging used inside cement kiln |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1160841A true CN1160841A (en) | 1997-10-01 |
| CN1099576C CN1099576C (en) | 2003-01-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96103310 Expired - Fee Related CN1099576C (en) | 1996-03-29 | 1996-03-29 | Vacuum forming technology for lining plate of heat-resisting steel hanging used inside cement kiln |
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| Country | Link |
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| CN (1) | CN1099576C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101780537B (en) * | 2009-12-28 | 2011-09-07 | 山东蒙凌工程机械股份有限公司 | Method for casting low-alloy cast steel automobile axle housing through V-process technology |
| CN102183151A (en) * | 2011-03-15 | 2011-09-14 | 江苏华信达特钢科技有限公司 | Internal cylinder for pre-heater cyclone, preparation method and special ceramic hanging pieces thereof |
| CN102278891A (en) * | 2011-08-18 | 2011-12-14 | 江苏华信达特钢科技有限公司 | Preheater cyclone internal cylinder with steel strips made of super-strong heat resistant steel |
| CN103884186A (en) * | 2014-04-01 | 2014-06-25 | 梧州漓佳铜棒有限公司 | Upper frame edge of furnace door of metallurgical furnace and bricklaying method thereof |
| CN109290518A (en) * | 2017-07-25 | 2019-02-01 | 郑州为新科技有限公司 | A kind of vertical formative technology of V method and casting technique |
-
1996
- 1996-03-29 CN CN 96103310 patent/CN1099576C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101780537B (en) * | 2009-12-28 | 2011-09-07 | 山东蒙凌工程机械股份有限公司 | Method for casting low-alloy cast steel automobile axle housing through V-process technology |
| CN102183151A (en) * | 2011-03-15 | 2011-09-14 | 江苏华信达特钢科技有限公司 | Internal cylinder for pre-heater cyclone, preparation method and special ceramic hanging pieces thereof |
| CN102278891A (en) * | 2011-08-18 | 2011-12-14 | 江苏华信达特钢科技有限公司 | Preheater cyclone internal cylinder with steel strips made of super-strong heat resistant steel |
| CN102278891B (en) * | 2011-08-18 | 2012-12-19 | 江苏华信达特钢科技有限公司 | Preheater cyclone internal cylinder with steel strips made of super-strong heat resistant steel |
| CN103884186A (en) * | 2014-04-01 | 2014-06-25 | 梧州漓佳铜棒有限公司 | Upper frame edge of furnace door of metallurgical furnace and bricklaying method thereof |
| CN109290518A (en) * | 2017-07-25 | 2019-02-01 | 郑州为新科技有限公司 | A kind of vertical formative technology of V method and casting technique |
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| Publication number | Publication date |
|---|---|
| CN1099576C (en) | 2003-01-22 |
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