CN104988326B - Filter medium and preparation method thereof and the purifier with the filter medium - Google Patents
Filter medium and preparation method thereof and the purifier with the filter medium Download PDFInfo
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- CN104988326B CN104988326B CN201510458817.8A CN201510458817A CN104988326B CN 104988326 B CN104988326 B CN 104988326B CN 201510458817 A CN201510458817 A CN 201510458817A CN 104988326 B CN104988326 B CN 104988326B
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- threeway
- collecting tank
- purifier
- screen pipe
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- 238000002360 preparation method Methods 0.000 title claims abstract description 7
- 230000001681 protective effect Effects 0.000 claims abstract description 23
- 238000007789 sealing Methods 0.000 claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000000843 powder Substances 0.000 claims abstract description 11
- 238000002203 pretreatment Methods 0.000 claims abstract description 11
- GVALZJMUIHGIMD-UHFFFAOYSA-H magnesium phosphate Chemical compound [Mg+2].[Mg+2].[Mg+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O GVALZJMUIHGIMD-UHFFFAOYSA-H 0.000 claims abstract description 10
- 239000004137 magnesium phosphate Substances 0.000 claims abstract description 10
- 229960002261 magnesium phosphate Drugs 0.000 claims abstract description 10
- 229910000157 magnesium phosphate Inorganic materials 0.000 claims abstract description 10
- 235000010994 magnesium phosphates Nutrition 0.000 claims abstract description 10
- 239000013530 defoamer Substances 0.000 claims abstract description 9
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 8
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims description 48
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 34
- 239000000956 alloy Substances 0.000 claims description 30
- 229910045601 alloy Inorganic materials 0.000 claims description 29
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 28
- 238000001035 drying Methods 0.000 claims description 21
- 229920005830 Polyurethane Foam Polymers 0.000 claims description 18
- 239000011496 polyurethane foam Substances 0.000 claims description 18
- 239000011265 semifinished product Substances 0.000 claims description 18
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 15
- 238000005245 sintering Methods 0.000 claims description 14
- 239000002002 slurry Substances 0.000 claims description 14
- 238000001816 cooling Methods 0.000 claims description 13
- 239000011777 magnesium Substances 0.000 claims description 13
- 239000006185 dispersion Substances 0.000 claims description 10
- 238000001914 filtration Methods 0.000 claims description 10
- 238000010008 shearing Methods 0.000 claims description 10
- 229910052749 magnesium Inorganic materials 0.000 claims description 9
- 238000003892 spreading Methods 0.000 claims description 9
- 230000007480 spreading Effects 0.000 claims description 9
- 238000003756 stirring Methods 0.000 claims description 9
- 238000012545 processing Methods 0.000 claims description 8
- 238000009423 ventilation Methods 0.000 claims description 6
- 238000010792 warming Methods 0.000 claims description 5
- 239000011800 void material Substances 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims 1
- 239000012535 impurity Substances 0.000 abstract description 28
- 238000000746 purification Methods 0.000 abstract description 13
- 229910052684 Cerium Inorganic materials 0.000 abstract description 10
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 abstract description 10
- 230000000694 effects Effects 0.000 abstract description 10
- 239000002245 particle Substances 0.000 abstract description 10
- 229910052761 rare earth metal Inorganic materials 0.000 abstract description 10
- 150000002910 rare earth metals Chemical class 0.000 abstract description 10
- 230000008859 change Effects 0.000 abstract description 8
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 32
- 229910000861 Mg alloy Inorganic materials 0.000 description 23
- 238000000034 method Methods 0.000 description 23
- 229910052751 metal Inorganic materials 0.000 description 20
- 239000002184 metal Substances 0.000 description 19
- 239000000395 magnesium oxide Substances 0.000 description 16
- 239000007789 gas Substances 0.000 description 15
- 239000000243 solution Substances 0.000 description 11
- 238000004519 manufacturing process Methods 0.000 description 8
- 239000010813 municipal solid waste Substances 0.000 description 8
- 230000008569 process Effects 0.000 description 7
- 238000005266 casting Methods 0.000 description 6
- 238000004140 cleaning Methods 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 5
- 239000001301 oxygen Substances 0.000 description 5
- 229910052760 oxygen Inorganic materials 0.000 description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 4
- 238000009825 accumulation Methods 0.000 description 4
- 230000003749 cleanliness Effects 0.000 description 4
- 238000011161 development Methods 0.000 description 4
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 4
- 239000010931 gold Substances 0.000 description 4
- 229910052737 gold Inorganic materials 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- -1 MgO Chemical compound 0.000 description 3
- 229910019142 PO4 Inorganic materials 0.000 description 3
- 239000012298 atmosphere Substances 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 3
- 230000000975 bioactive effect Effects 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 230000008030 elimination Effects 0.000 description 3
- 238000003379 elimination reaction Methods 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 239000000155 melt Substances 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 229910052755 nonmetal Inorganic materials 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- 239000006104 solid solution Substances 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- 238000009834 vaporization Methods 0.000 description 3
- 230000008016 vaporization Effects 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 229910052786 argon Inorganic materials 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 230000007123 defense Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- 229910019758 Mg2Ni Inorganic materials 0.000 description 1
- 229910020056 Mg3N2 Inorganic materials 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- MSKSOBAQMWJYTJ-UHFFFAOYSA-N [Mg].OP(O)(O)=O Chemical compound [Mg].OP(O)(O)=O MSKSOBAQMWJYTJ-UHFFFAOYSA-N 0.000 description 1
- QRSFFHRCBYCWBS-UHFFFAOYSA-N [O].[O] Chemical compound [O].[O] QRSFFHRCBYCWBS-UHFFFAOYSA-N 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000012459 cleaning agent Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010835 comparative analysis Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 208000020442 loss of weight Diseases 0.000 description 1
- 239000013528 metallic particle Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 208000016261 weight loss Diseases 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Filtering Materials (AREA)
Abstract
Filter medium and preparation method thereof and the purifier with the filter medium, filter medium are made up of following components by weight percentage：Magnesium phosphate 0.5 5%；Polyvinyl alcohol 1 5%；Defoamer 0.1 1%；Cerium-rich rare earth 0.1 0.5%；MgO powders 75 85%；Remaining component is water.The preparation method of the filter medium comprises the following steps：Step 1, pre-treatment；Step 2, slurrying；Step 3, it is coated with；Step 4, dry；Step 5, sinter.Purifier with filter medium includes can be around the threeway that inlet axis rotates, the respectively running channel being connected with threeway entrance, screen pipe, filter medium, filter medium two, collecting tank and the sealing protective with two outlet connections of threeway.Filter medium profit of the present invention can intercept various sizes of impurity, enable in particular to effectively intercept the impurity below 5 μm of particle diameter, the filter medium has good normal temperature and elevated temperature strength, adapts to the temperature change in purification process, ensures clean-up effect.
Description
Technical field
The present invention relates to metal and alloy purification field, in particular for the filter medium of purification metal and alloy, prepares
Method and the purifier with the filter medium.
Background technology
At present, Aeronautics and Astronautics and weaponry etc. are due to special working environment, structure loss of weight and structural bearing and function
Integration is the important directions of its development, and magnesium alloy has high small density, specific strength and specific stiffness, excellent earthquake resistance and cutting
The advantages that processing characteristics is good, is had broad application prospects in Aero-Space and national defense and military industrial circle, be described as 21 century
The green material of resource and environment sustainable development, it has also become the focus of countries in the world common concern.Magnesium is that reserves are most on the earth
One of abundant element, and China is magnesium resource and magnesium alloy big producer, magnesium and magnesium alloy ingot yield account for Gross World Product
More than half.A large amount of weight loss effects that maximum is can reach using magnesium alloy manufacture spacecraft and weaponry parts, will be not
Come Aero-Space and the important directions of national defense and military industrial development.
" there is individual knot on shoulder pole, it is easily disconnected in use；Metal or alloy cleanliness factor is low, and there is impurity centre, and they are being used
In easily fail." many tactics in China, the equipment of strategic level and device slower development so far, such as：Aircraft carrier, destroyer,
Submarine, opportunity of combat, gas turbine, internal combustion engine, it is that material is not all right to trace it to its cause, by with same trade mark quality material comparative analysis, I
Find that these material compositions are identical, but the cleanliness factor of material is as far apart as heaven and earth.Current magnesium alloy is used as non-structural part mostly, its
In a key reason be that inclusion content in magnesium alloy is higher, had a strong impact on the performance of its mechanical property.In recent years, with
And magnesium alloy research is deepened continuously, it has been found that the low cleanliness factor of magnesium alloy turns into the crucial bottle for restricting magnesium alloy application
One of neck.
Up to the present, purification of the people to alloy had been developed for 3.5 generations.
1st generation：Blank.Since the mankind metal smelting, just understand and reduced with C element, the oxygen oxygen in air
The chemical purification method of change, by simple slagging process, regulate and control O elements in alloy, C element, S elements, P element, so as to
Lift the performance of alloy.
2nd generation：Chemical cleaning method.- 19th century of 18th century mid-term, the mankind start with different slagging methods, partial pressure method,
Even vacuum environment, is purified by adding chemical reagent to alloy, such as：Coverture, slagging agent, furnace cleaning agent etc., remove
Impurity in metal or alloy, O elements, C element in purpose regulation and control alloy, S elements, P element etc., so as to lift metal or conjunction
The performance of gold, this has promoted the rapid advances of human society.
3rd generation：Physical cleaning.19th century, mid-term was by 2007.On the basis of before, the mankind start to use physical medium
(screen pack, accumulation ball, foamed ceramics etc.) filters to alloy, removes oxide therein, regulates and controls O elements, C in alloy
Element, S elements, P element etc., so as to lift the performance of alloy, these advanced alloys have promoted the quick to celestial body of human society
The external space strides forward.Presence for tiny field trash, the especially field trash of 1-10 micron levels in alloy, direct shadow
The performance of alloy is rung, the considerable sophisticated technology in China can not be broken through, and its basic point is directly related with material cleanliness factor, its
Behind is exactly that the field trash in metal or alloy material can not be removed effectively.It is deep to purify skill on the basis of first three generation technique
Art can effectively remove more than 1 micron of field trash in alloy, significantly lift the performance of alloy, so that deep purification technique
Return material after processing can put into production again, can be that enterprise brings considerable income.Impurity in magnesium alloy is according to composition
It is different with structure, it is divided into nonmetal inclusion and metal inclusion.Nonmetal inclusion is based on the nitrogen oxides of magnesium, such as MgO, Mg3N2
Deng；Metal inclusion is based on Fe, Ni, Cu etc..Field trash typically remains in magnesium alloy in the form of film-form, particle shape or tufted
On the matrix or crystal boundary of part.Impurity in magnesium alloy seriously destroys the inherent integrality of magnesium alloy, influences the quality of magnesium alloy,
Reduce the performance of magnesium alloy.Meanwhile it significantly limit the work of other reinforcing means (such as heat treatment, microalloying, rotten)
Use effect.Nonmetal inclusion also reduces the mobility of magnesium alloy fused mass, deteriorates the casting character of alloy, isolates magnesium matrix, there is provided
Formation of crack, causes stress concentration, seriously drops low-alloyed intensity, toughness and fatigue behaviour etc., and also association shrinkage porosite, stomata etc. lack
Fall into.It is mingled with and also forms Hard Inclusion in the magnesium alloy, causes processing characteristics and poor surface smoothness, while to corrosion resistance also very not
Profit.The solid solubility of the metal inclusions such as Fe, Ni, Cu in the magnesium alloy all very littles, iron with magnesium alloy substrate to have very big potential difference
The formal distribution of insoluble iron phase is in crystal boundary, and Ni, Cu are often formed with magnesium and are heat-treated insoluble Mg2Ni、Mg2The metallic compounds such as Cu
Phase, with net distribution in crystal boundary, the corrosion resistance of magnesium is reduced, while also reduce the plasticity of alloy.
Using the method for chemical cleaning method, due to using chemical material, such as：Fluoride, chlorine, nitrate, sulfide, easily
Volatile matter, caused slag and caused gas turn into industrial discharge, and not only the body of operating personnel is damaged, and increase
The burden of environment；
Using physical cleaning method, it is necessary to increase big pressure head, make metal or alloy passes through filtering under gravity
Medium.Although this method is effective to the field trash for intercepting 5-10 micron above ranks, to the field trash of less than 5 microns ranks
There is interception result, but it is ineffective；It is this to consume valuable metal material to increase pressure head, reduce the recovery of material
Rate；If carrying out physical cleaning in open space, oxygen, vapor are necessarily mixed into metal or alloy in air, are formed 2 times
Field trash, influence the follow-up use of material.
Metal running channel makes difficult in the patent that notification number is CN102069147A, and bias be present, causes to send out in production
Raw strenuous vibration；Filter medium is placed extremely difficult, and is easily damaged in placement process and produces scaling-off, causes filter medium broken
Bits are mixed into alloy；In production process in addition to vacuum, atmosphere is uncontrollable in filter process, oxygen and vapor in air
Formed 2 times and be mingled with alloy.The patent of Application No. 200910008119.2 discloses a kind of centrifugal rotor, and filter medium is straight
The part for making rotor is connect, it not only makes difficulty, and the filter medium making difficulty that size is big, and deformation is serious, percent defective
It is very high, often interfered and damaged generation chip pollution metal with the other parts of rotor in engineering；In addition to vacuum
In production process, atmosphere is uncontrollable in filter process, and the oxygen and vapor and alloy in air, which are formed 2 times, to be mingled with, therefore
Need a kind of purifier that can overcome drawbacks described above badly.
The content of the invention
The technical problem to be solved in the present invention is to provide it is a kind of effectively intercept non-ferrous metal of the fusing point below 1000 DEG C or
Particle diameter filter medium of impurity and preparation method thereof below 5 microns in alloy especially magnesium alloy fused mass, while band is also provided
There is the purifier of the filter medium, purifier manufacture, easy to assembly, stabilized structure, and air pollution melt can be avoided.
In order to solve the above-mentioned technical problem, the invention provides a kind of filter medium, by weight percentage by following components
It is made：
Remaining component is water.
Present invention also offers a kind of preparation method of above-mentioned filter medium, comprise the following steps：
Step 1, pre-treatment, three-dimensional polyurethane foam sponge skeleton is immersed into the NaOH that concentration is 10%~20% mass ratio
In solution, 2~4h is hydrolyzed at a temperature of 40~60 DEG C, then rubs and is dried after being rinsed with clear water repeatedly；
Step 2, slurrying, polyvinyl alcohol and magnesium phosphate are dissolved in water, and are stirred using shearing dispersion machine, stirring speed
Spend for 100~500 revs/min, add defoamer, aqueous temperature is controlled at 40-60 DEG C, by 200 mesh pure zirconia magnesium powder material and
400 mesh pure zirconia magnesium powder material are according to 3：1 mass ratio is poured into above-mentioned solution, 200 mesh pure zirconia magnesium powder material and 400 mesh pure zirconias
The quality of magnesium powder material accounts for the 75~85% of gross mass, is stirred using shearing dispersion machine, 80~300 revs/min of the speed of stirring
Clock；
Step 3, it is coated with, the three-dimensional polyurethane foam sponge skeleton after pre-treatment is immersed in the slurry that step 2 obtains,
Gas fully in discharge skeleton, is constantly extruded, its surface and inner homogeneous is coated with spreading mass, after pulling out, in its side
Spreading mass is smeared on side, forms closed side wall；
Step 4, dry, dry in the shade, be positioned over what is be coated with shady and cool ventilation naturally first, carry out processing of drying in the shade, 12-48 is small
When so that framework material size is substantially stabilized, and the semi-finished product to be dried of filter medium are made；Then electric furnace is dried, after drying in the shade
Filter medium semi-finished product be put into drying oven and dried, the programming rate of drying oven is 0.5-5 DEG C/min, is warming up to 90-
120 DEG C, 1-2 hours are incubated, then furnace cooling, fully remove the volatizable material in slurry, complete the stress of framework material
Eliminate, the semi-finished product to be sintered of filter medium are made；
Step 5, sinter, including less than 400 DEG C of low-temperature space sintering and more than 400 DEG C to 1200 DEG C of middle warm area sinter,
When low-temperature space sinters, less than 200 DEG C programming rates be 2-5 DEG C/min, more than 200 DEG C to 400 DEG C programming rates for 1-3 DEG C/
Min, 30 minutes are incubated at 400 DEG C；During middle warm area sintering, more than 400 DEG C to 1200 DEG C, programming rate is 3-5 DEG C/min,
1200 DEG C of insulation 6-10 hours, then furnace cooling, filter medium is made.
Present invention also offers a kind of purifier with above-mentioned filter medium, including can be rotated around inlet axis three
The logical, running channel that be connected with the entrance of the threeway, export the screen pipes connected, filter medium, collection with two of threeway respectively
Groove and sealing protective, the screen pipe have the through hole for being available for alloy melt to flow out, mistake with respect to the other end that threeway exports
Filter medium is placed in screen pipe, and in a ring, its notch is immediately below the rotational trajectory of filtering pipe through-hole, collecting tank bottom for collecting tank
Portion is provided with the through hole for being available for melt to flow out, and the threeway, filter medium, collecting tank and running channel entrance are each provided at close with lower portion
Seal in protective cover, heater strip and the blow vent for being filled with and discharging protective gas are provided with the sealing protective.
Preferably, the threeway bottom is connected and the axis of its entrance and the axis of rotating shaft with the rotating shaft that can be rotated about the axis
Overlap, the workbench of sustainable screen pipe is fixed with rotating shaft.
Preferably, the void density of the filter medium in the screen pipe is along liquid flow path direction from dredging to close.
Preferably, it is provided with the spacing ring for being used for limiting filter medium movement between the filter medium and threeway outlet.
Preferably, the pipeline outer wall that pours is connected with sealing protective by bearing.
Preferably, the ingot mould for containing melt is equipped with immediately below each through hole of the collecting tank.
Preferably, the lateral wall of the collecting tank is higher than the via height of screen pipe.
Preferably, the collection trench bottom is covered with filter medium two.
Filter medium of the present invention is coated with slurry and by drying by the use of three-dimensional polyurethane foam sponge as skeleton in skeleton
Filter medium is obtained with sintering procedure, is prepared not by selecting the three-dimensional polyurethane foam sponge of different aperture density to be used as skeleton
With the filter medium of void density, so as to intercept various sizes of impurity, enable in particular to effectively miscellaneous below 5 microns of particle diameter of interception
Matter, the filter medium have good normal temperature strength and elevated temperature strength, can adapt to the temperature change in purification process, ensure
Clean-up effect.
Present invention also offers the purifier with the filter medium, and this purifier is respectively by running channel and with filtering
The screen pipe of medium is mounted in the entrance and exit of threeway, and drives threeway to rotate by motor, so that melt is in centrifugal force
To screen pipe output flow under effect, the filter medium that melt passes through in screen pipe is to go the removal of impurity, with 3 generation thing in the prior art
Reason purification is compared using gravity head purification, and the consumption of filter medium and refractory material is reduced using centrifugal force cleaning melt,
Reduce production cost；Filter medium can be put into screen pipe, and installation and removal are convenient, and the bits that avoid damaging are mixed into alloy,
It is more convenient the assembling of this purifier simultaneously, avoiding being integrally formed manufacture causes highly difficult and low yields, stabilized structure, has
Effect avoids eccentric and modification；This purifier also includes sealing protective, and the protective gas such as argon gas can be filled with sealing protective,
The oxygen and vapor contaminated melt in air are effectively avoided, lifts clean-up effect.Collect trench bottom and be covered with filter medium two, with
Just the impurity that melt enters in the melt filtration that takes a step forward of ingot mould.
Brief description of the drawings
Fig. 1 is the front sectional view of purifier of the present invention with filter medium.
Fig. 2 is the stereogram of filter medium.
Fig. 3 is the top view of collecting tank.
Embodiment
Embodiment 1
The slurry solvent of the configurating filtered medium of the present embodiment is made up of following components by weight percentage：0.5% phosphorus
Sour magnesium, 1% polyvinyl alcohol, 0.1% defoamer, 0.1% cerium-rich rare earth, 75-85% MgO powders, remaining component are
Water.
The present embodiment additionally provides the method that filter medium is prepared according to said components and content, comprises the following steps：
Step 1, pre-treatment, three-dimensional polyurethane foam sponge skeleton is immersed into the NaOH solution that concentration is 10% mass ratio
In, 2h is hydrolyzed at a temperature of 40 DEG C, then rubs and is dried after being rinsed with clear water repeatedly；
Step 2, slurrying, polyvinyl alcohol and magnesium phosphate are dissolved in water, and are stirred using shearing dispersion machine, stirring speed
Spend for 10 revs/min, add defoamer, aqueous temperature is controlled at 40 DEG C, by 200 mesh pure zirconia magnesium powder material and 400 mesh pure oxygens
Change magnesium powder material according to 3：1 mass ratio is poured into above-mentioned solution, while adds cerium-rich rare earth, 200 mesh pure zirconia magnesium powder material and 400
The quality of mesh pure zirconia magnesium powder material accounts for the 75% of gross mass, is stirred using shearing dispersion machine, 80 revs/min of the speed of stirring
Clock；
Step 3, it is coated with, the three-dimensional polyurethane foam sponge skeleton after pre-treatment is immersed in the slurry that step 2 obtains,
Gas fully in discharge skeleton, is constantly extruded, its surface and inner homogeneous is coated with spreading mass, after pulling out, in its side
Spreading mass is smeared on side, forms closed side wall, prevents from revealing melt from side wall in use, to be dried；
Step 4, dry, dry in the shade, be positioned over what is be coated with shady and cool ventilation naturally first, carry out processing of drying in the shade, dry in the shade 12
Hour so that framework material size is substantially stabilized, and the semi-finished product to be dried of filter medium are made；Then electric furnace is dried, and will be dried in the shade
Filter medium semi-finished product afterwards, which are put into drying oven, is dried, and the programming rate of drying oven is 0.5 DEG C/min, is warming up to 90
DEG C, 1 hour is incubated, then furnace cooling, fully removes the volatizable material in slurry, completes the stress elimination of framework material,
The semi-finished product to be sintered of filter medium are made；
Step 5, sinter, including less than 400 DEG C of low-temperature space sintering and more than 400 DEG C to 1200 DEG C of middle warm area sinter,
When low-temperature space sinters, less than 200 DEG C programming rates are 2 DEG C/min, and more than 200 DEG C to 400 DEG C programming rates are 1 DEG C/min, are prevented
Only binding agent evaporation rate it is too fast and in sample powder accumulation body formed fine crack and reduce the intensity and surface matter of sample
Amount, or even waste product is caused, 30 minutes are incubated at 400 DEG C, prevents framework material volatilization from causing semi-finished product unstability, powder occurs,
Three-dimensional polyurethane foam sponge skeleton is because of vaporization at high temperature in the process, so as to form the hole for intercepting impurity；
During middle warm area sintering, more than 400 DEG C to 1200 DEG C, programming rate is 3 DEG C/min, and at this moment magnesium phosphate will start to send out
Solution estranged:Mg3(PO4)2→MgO+P 2O5；The P during sintering2O5Volatilization, [MgO] of bioactive molecule state is left by MgO
Particle bonds, and turns into the structure of 3 D stereo；Be incubated 6 hours at 1200 DEG C, be in order to reach best normal temperature strength with
Elevated temperature strength, in this stage, magnesia is made caused due to great number of grains phase transformation due to the solid solution effect of cerium-rich rare earth
Stress is released, then furnace cooling, and filter medium is made, as shown in Fig. 2 the surrounding side of the filter medium 3 is closed, just
Face and the back side be available for melt by and intercept impurity.
Through experiment, the filter medium 3 that the present embodiment obtains effectively intercepts non-ferrous metal or conjunction of the fusing point below 1000 DEG C
Impurity in gold especially magnesium alloy fused mass, the three-dimensional polyurethane foam sponge that different aperture density may be selected are prepared as skeleton
The filter medium 3 of different aperture density, so as to intercept various sizes of impurity, enable in particular to effectively intercept below 5 microns of particle diameter
Impurity.Outward appearance has good normal temperature strength and elevated temperature strength, can adapt to the temperature in purification process without blind crack
Change, has good thermal shock resistance.
The purifier with the filter medium can be manufactured after obtaining filter medium, is as shown in Figure 1 present invention purification
The front sectional view of device, the purifier include to be connected around the threeway 8 that inlet axis rotates, with the entrance of the threeway 8
Running channel 7, screen pipe 4, filter medium 3, collecting tank 10 and the sealing protective 1 with two of threeway 8 outlet connections respectively.
The screen pipe 4 has the through hole for being available for melt to flow out, multiple filter mediums 3 with respect to the other end that threeway 8 exports
It is placed in screen pipe 4, side and the inwall of screen pipe 4 of filter medium 3 are affixed, and the front and back of filter medium 3 is perpendicular to filtering
The axis of pipe 4 is to purify melt.The filter medium 3 and threeway 8 are provided between exporting to be used to limit the spacing of the movement of filter medium 3
Ring 2, the void density of the filter medium 3 in screen pipe 4 along liquid flow path direction (be exported to from threeway 8 and consider the through hole of pipe 4) from dredge to
It is close, to intercept impurity from big to small successively.
The bottom of threeway 8 is connected with the rotating shaft 14 that can be rotated about the axis and the axis of its entrance and the axis weight of rotating shaft 14
Close, rotating shaft 14 drives rotation by motor 12, the workbench 6 of sustainable screen pipe 4 is fixed with rotating shaft 14, that is to say, that rotating shaft 14
During rotation, threeway 8, running channel 7, screen pipe 4 and workbench 6 can also rotate with, and melt flows to filtering under the influence of centrifugal force
The through hole of pipe 4, is intercepted by impurity during filter medium 3.The outer wall of running channel 7 is connected with sealing protective 1 by bearing.
As shown in figure 3, collecting tank 10 is in a ring, its notch is immediately below the rotational trajectory of the through hole of screen pipe 4, collecting tank
10 lateral wall is higher than the height of the through hole of screen pipe 4, to collect the melt thrown away from the through hole of screen pipe 4.Collecting tank 10
Bottom is provided with the through hole for being available for melt to flow out, and through hole is arranged right below that melt can be received and forms the ingot mould 13 of casting mold, collects
The bottom of groove 10 is covered with filter medium 25, the impurity entered so as to melt in the melt filtration that takes a step forward of ingot mould 13.Described three
Logical 8, filter medium 3, collecting tank 10, ingot mould 13 and the entrance of running channel 7 are located in sealing protective 1 with lower portion, described close
Heater strip 9 and the blow vent 11 for being filled with and discharging protective gas (such as argon gas), protective gas are provided with envelope protective cover 1
Melt can be avoided by the oxygen and moisture contamination in air.
It should implement according to the following steps during using the purifier：
1st, screen pipe prepares：Filter medium 3 is filled in screen pipe 4, filter medium 3 is fixed with spacing ring 2, then by it
It is put into drying oven and is dried, minimum 120 degree of temperature, is incubated more than 30 minutes, furnace cooling.
2nd, install, debug：Screen pipe 4 after cooling and running channel 7 are arranged in threeway 8, preliminary operation is carried out and moves, it is ensured that do not have
Excessive vibrations and interference, then cover sealing protective 1.
3rd, preheat：Linear pattern heating rod with blower fan is inserted in the road junction of running channel 7, pre- hot runner 7 and filter medium two
5, while heater strip 9 is opened, blow vent 11 is opened, the preheating temperature and sealing protection of running channel 7 are determined according to actual metal situation
Preheating temperature in cover 1, minimum 120 degree.
4th, ventilation protection：(the specific time, which is determined, before casting according to gas flow and confined space size) is filled with protectiveness
Gas, while remove linear pattern heating rod, close blow vent 11.
5th, cast：After determining that protectiveness atmosphere is formed, start, after motor speed reaches certain rotating speed, by metal or alloy
It is intraoral to pour into sprue.
6th, clear up：After the completion of casting, heater strip 9 and protective gas are closed, after casting cooling, opens sealing protective
1, casting, screen pipe 4, running channel 7, filter medium 3 are taken out, clears up on machine the metallic particles and foreign matter hung.
Embodiment 2
The slurry solvent of the configurating filtered medium of the present embodiment is made up of following components by weight percentage：3% phosphoric acid
Magnesium, 3% polyvinyl alcohol, 0.3% defoamer, 0.3% cerium-rich rare earth, 75-85% MgO powders, remaining component are water.
The present embodiment additionally provides the method that filter medium is prepared according to said components and content, comprises the following steps：
Step 1, pre-treatment, three-dimensional polyurethane foam sponge skeleton is immersed into the NaOH solution that concentration is 15% mass ratio
In, 4h is hydrolyzed at a temperature of 50 DEG C, then rubs and is dried after being rinsed with clear water repeatedly；
Step 2, slurrying, polyvinyl alcohol and magnesium phosphate are dissolved in water, and are stirred using shearing dispersion machine, stirring speed
Spend for 150 revs/min, add defoamer, aqueous temperature is controlled below 40 DEG C, by 200 mesh pure zirconia magnesium powder material and 400 mesh
Pure zirconia magnesium powder material is according to 3：1 mass ratio is poured into above-mentioned solution, while adds cerium-rich rare earth, 200 mesh pure zirconia magnesium powder material
The 80% of gross mass is accounted for the quality of 400 mesh pure zirconia magnesium powder material, is stirred using shearing dispersion machine, the speed 140 of stirring
Rev/min；
Step 3, it is coated with, the three-dimensional polyurethane foam sponge skeleton after pre-treatment is immersed in the slurry that step 2 obtains,
Gas fully in discharge skeleton, is constantly extruded, its surface and inner homogeneous is coated with spreading mass, after pulling out, in its side
Spreading mass is smeared on side, forms closed side wall, prevents from revealing melt from side wall in use, to be dried；
Step 4, dry, dry in the shade, be positioned over what is be coated with shady and cool ventilation naturally first, carry out processing of drying in the shade, 36 hours,
So that framework material size is substantially stabilized, the semi-finished product to be dried of filter medium are made；Then electric furnace is dried, by the mistake after drying in the shade
Filter medium semi-finished product, which are put into drying oven, is dried, and the programming rate of drying oven is 3 DEG C/min, is warming up to 110 DEG C, insulation 2
Hour, then furnace cooling, the volatizable material in slurry is fully removed, the stress elimination of framework material is completed, filtering is made
The semi-finished product to be sintered of medium；
Step 5, sinter, including less than 400 DEG C of low-temperature space sintering and more than 400 DEG C to 1200 DEG C of middle warm area sinter,
When low-temperature space sinters, less than 200 DEG C programming rates are 3 DEG C/min, and more than 200 DEG C to 400 DEG C programming rates are 2 DEG C/min, are prevented
Only binding agent evaporation rate it is too fast and in sample powder accumulation body formed fine crack and reduce the intensity and surface matter of sample
Amount, or even waste product is caused, 30 minutes are incubated at 400 DEG C, prevents framework material volatilization from causing semi-finished product unstability, powder occurs,
Three-dimensional polyurethane foam sponge skeleton is because of vaporization at high temperature in the process, so as to form the hole for intercepting impurity；
During middle warm area sintering, more than 400 DEG C to 1200 DEG C, programming rate is 4 DEG C/min, and at this moment magnesium phosphate will start to send out
Solution estranged:Mg3(PO4)2→MgO+P2O5；The P during sintering2O5Volatilization, [MgO] of bioactive molecule state is left by MgO
Particle bonds, and turns into the structure of 3 D stereo；Be incubated 8 hours at 1200 DEG C, be in order to reach best normal temperature strength with
Elevated temperature strength, in this stage, magnesia is made caused due to great number of grains phase transformation due to the solid solution effect of cerium-rich rare earth
Stress is released, then furnace cooling, and filter medium is made, as shown in Fig. 2 the surrounding side of the filter medium 3 is closed, just
Face and the back side be available for melt by and intercept impurity.
Through experiment, the filter medium 3 that the present embodiment obtains effectively intercepts non-ferrous metal or conjunction of the fusing point below 1000 DEG C
Impurity in gold especially magnesium alloy fused mass, the three-dimensional polyurethane foam sponge that different aperture density may be selected are prepared as skeleton
The filter medium 3 of different aperture density, so as to intercept various sizes of impurity, enable in particular to effectively intercept below 5 microns of particle diameter
Impurity.Outward appearance has good normal temperature strength and elevated temperature strength, can adapt to the temperature in purification process without blind crack
Change, has good thermal shock resistance.
The purifier and its application method of the present embodiment are same as Example 1, repeat no more.
Embodiment 3
The filter medium of the present embodiment is made up of following components by weight percentage：5% magnesium phosphate, 5% polyethylene
Alcohol, 1% defoamer, 0.5% cerium-rich rare earth, 75-85% MgO powders, remaining component are water.
The present embodiment additionally provides the method that filter medium is prepared according to said components and content, comprises the following steps：
Step 1, pre-treatment, three-dimensional polyurethane foam sponge skeleton is immersed into the NaOH solution that concentration is 20% mass ratio
In, 4h is hydrolyzed at a temperature of 60 DEG C, then rubs and is dried after being rinsed with clear water repeatedly；
Step 2, slurrying, polyvinyl alcohol and magnesium phosphate are dissolved in water, and are stirred using shearing dispersion machine, stirring speed
Spend for 500 revs/min, add defoamer, aqueous temperature is controlled at 60 DEG C, by 200 mesh pure zirconia magnesium powder material and 400 mesh pure oxygens
Change magnesium powder material according to 3：1 mass ratio is poured into above-mentioned solution, while adds cerium-rich rare earth, 200 mesh pure zirconia magnesium powder material and 400
The quality of mesh pure zirconia magnesium powder material accounts for the 85% of gross mass, is stirred using shearing dispersion machine, 300 revs/min of the speed of stirring
Clock；
Step 3, it is coated with, the three-dimensional polyurethane foam sponge skeleton after pre-treatment is immersed in the slurry that step 2 obtains,
Gas fully in discharge skeleton, is constantly extruded, its surface and inner homogeneous is coated with spreading mass, after pulling out, in its side
Spreading mass is smeared on side, forms closed side wall, prevents from revealing melt from side wall in use, to be dried；
Step 4, dry, dry in the shade, be positioned over what is be coated with shady and cool ventilation naturally first, carry out processing of drying in the shade, 48 hours,
So that framework material size is substantially stabilized, the semi-finished product to be dried of filter medium are made；Then electric furnace is dried, by the mistake after drying in the shade
Filter medium semi-finished product, which are put into drying oven, is dried, and the programming rate of drying oven is 5 DEG C/min, is warming up to 120 DEG C, insulation 2
Hour, then furnace cooling, the volatizable material in slurry is fully removed, the stress elimination of framework material is completed, filtering is made
The semi-finished product to be sintered of medium；
Step 5, sinter, including less than 400 DEG C of low-temperature space sintering and more than 400 DEG C to 1200 DEG C of middle warm area sinter,
When low-temperature space sinters, less than 200 DEG C programming rates are 5 DEG C/min, and more than 200 DEG C to 400 DEG C programming rates are 3 DEG C/min, are prevented
Only binding agent evaporation rate it is too fast and in sample powder accumulation body formed fine crack and reduce the intensity and surface matter of sample
Amount, or even waste product is caused, 30 minutes are incubated at 400 DEG C, prevents framework material volatilization from causing semi-finished product unstability, powder occurs,
Three-dimensional polyurethane foam sponge skeleton is because of vaporization at high temperature in the process, so as to form the hole for intercepting impurity；
During middle warm area sintering, more than 400 DEG C to 1200 DEG C, programming rate is 5 DEG C/min, and at this moment magnesium phosphate will start to send out
Solution estranged:Mg3(PO4)2→MgO+P2O5；The P during sintering2O5Volatilization, [MgO] of bioactive molecule state is left by MgO
Particle bonds, and turns into the structure of 3 D stereo；Be incubated 10 hours at 1200 DEG C, be in order to reach best normal temperature strength with
Elevated temperature strength, in this stage, magnesia is made caused due to great number of grains phase transformation due to the solid solution effect of cerium-rich rare earth
Stress is released, then furnace cooling, and filter medium is made, as shown in Fig. 2 the surrounding side of the filter medium 3 is closed, just
Face and the back side be available for melt by and intercept impurity.
Through experiment, the filter medium 3 that the present embodiment obtains effectively intercepts non-ferrous metal or conjunction of the fusing point below 1000 DEG C
Impurity in gold especially magnesium alloy fused mass, the three-dimensional polyurethane foam sponge that different aperture density may be selected are prepared as skeleton
The filter medium 3 of different aperture density, so as to intercept various sizes of impurity, enable in particular to effectively intercept below 5 microns of particle diameter
Impurity.Outward appearance has good normal temperature strength and elevated temperature strength, can adapt to the temperature in purification process without blind crack
Change, has good thermal shock resistance.
The purifier and its application method of the present embodiment are same as Example 1, repeat no more.
Claims (9)
1. a kind of filter medium, it is characterised in that be made up by weight percentage of following components：
2. the preparation method of filter medium described in a kind of claim 1, it is characterised in that comprise the following steps：
Step 1, pre-treatment, three-dimensional polyurethane foam sponge skeleton is immersed into the NaOH solution that concentration is 10%~20% mass ratio
In, 2~4h is hydrolyzed at a temperature of 40~60 DEG C, then rubs and is dried after being rinsed with clear water repeatedly；
Step 2, slurrying, polyvinyl alcohol and magnesium phosphate are dissolved in water, and are stirred using shearing dispersion machine, mixing speed is
100~500 revs/min, defoamer is added, aqueous temperature is controlled at 40-60 DEG C, by 200 mesh pure zirconia magnesium powder material and 400 mesh
Pure zirconia magnesium powder material is according to 3：1 mass ratio is poured into above-mentioned solution, 200 mesh pure zirconia magnesium powder material and 400 mesh pure zirconia magnesium powders
The quality of material accounts for the 75~85% of gross mass, is stirred using shearing dispersion machine, 80~300 revs/min of the speed of stirring；
Step 3, it is coated with, the three-dimensional polyurethane foam sponge skeleton after pre-treatment is immersed in the slurry that step 2 obtains, fully
The gas in skeleton is discharged, is constantly extruded, its surface and inner homogeneous is coated with spreading mass, after pulling out, is applied in its side
Slurry is spread, forms closed side wall；
Step 4, dry, dry in the shade, be positioned over what is be coated with shady and cool ventilation naturally first, carry out processing of drying in the shade, 12-48 hours,
So that framework material size is substantially stabilized, the semi-finished product to be dried of filter medium are made；Then electric furnace is dried, by the mistake after drying in the shade
Filter medium semi-finished product, which are put into drying oven, is dried, and the programming rate of drying oven is 0.5-5 DEG C/min, is warming up to 90-120
DEG C, 1-2 hours are incubated, then furnace cooling fully removes the volatizable material in slurry, and the stress for completing framework material disappears
Remove, the semi-finished product to be sintered of filter medium are made；
Step 5, sinter, including less than 400 DEG C of low-temperature space sintering and more than 400 DEG C to 1200 DEG C of middle warm area sinter, low temperature
When area sinters, less than 200 DEG C programming rates are 2-5 DEG C/min, and more than 200 DEG C to 400 DEG C programming rates are 1-3 DEG C/min,
400 DEG C are incubated 30 minutes；During middle warm area sintering, more than 400 DEG C to 1200 DEG C, programming rate is 3-5 DEG C/min, in 1200 DEG C of guarantors
Warm 6-10 hours, then furnace cooling, filter medium is made.
A kind of 3. purifier with filter medium described in claim 2, it is characterised in that：Including can be rotated around inlet axis
Threeway (8), be connected with the entrance of the threeway (8) running channel (7), the filtering with two of threeway (8) outlet connections respectively
(4), filter medium (3), collecting tank (10) and sealing protective (1) are managed, the screen pipe (4) is with respect to threeway (8) outlet
The other end has the through hole for being available for alloy melt to flow out, and filter medium (3) is placed in screen pipe (4), collecting tank (10) in a ring,
For its notch immediately below the rotational trajectory of screen pipe (4) through hole, collecting tank (10) bottom is provided with the through hole for being available for melt to flow out,
The threeway (8), filter medium (3), collecting tank (10) and running channel (7) entrance are each provided at sealing protective (1) with lower portion
It is interior, it is provided with heater strip (9) and the blow vent (11) for being filled with and discharging protective gas, institute in the sealing protective (1)
State collecting tank (10) bottom and be covered with filter medium two (5).
4. purifier according to claim 3, it is characterised in that：Threeway (8) bottom and it can rotate about the axis
Rotating shaft (14) connects and the axis of its entrance overlaps with the axis of rotating shaft (14), and rotating shaft is fixed with sustainable screen pipe on (14)
(4) workbench (6).
5. the purifier according to claim 3 or 4, it is characterised in that：Filter medium (3) in the screen pipe (4)
Void density along liquid flow path direction from dredging to close.
6. the purifier according to claim 3 or 4, it is characterised in that：The filter medium (3) exports with threeway (8)
Between be provided with and be used to limit the mobile spacing ring (2) of filter medium (3).
7. the purifier according to claim 3 or 4, it is characterised in that：Running channel (7) outer wall and sealing protective
(1) connected by bearing.
8. the purifier according to claim 3 or 4, it is characterised in that：Each through hole of the collecting tank (10) just under
Side is equipped with the ingot mould (13) for containing melt.
9. the purifier according to claim 3 or 4, it is characterised in that：The lateral wall of the collecting tank (10) was higher than
The via height of chimney filter (4).
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