CN107098125A - A kind of pusher of mannheim furnace production potassium sulfate fertilizer discharging cooler - Google Patents
A kind of pusher of mannheim furnace production potassium sulfate fertilizer discharging cooler Download PDFInfo
- Publication number
- CN107098125A CN107098125A CN201710317058.2A CN201710317058A CN107098125A CN 107098125 A CN107098125 A CN 107098125A CN 201710317058 A CN201710317058 A CN 201710317058A CN 107098125 A CN107098125 A CN 107098125A
- Authority
- CN
- China
- Prior art keywords
- pusher
- potassium sulfate
- sulfate fertilizer
- discharging cooler
- silicon carbide
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G33/00—Screw or rotary spiral conveyors
- B65G33/24—Details
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G33/00—Screw or rotary spiral conveyors
- B65G33/08—Screw or rotary spiral conveyors for fluent solid materials
- B65G33/14—Screw or rotary spiral conveyors for fluent solid materials comprising a screw or screws enclosed in a tubular housing
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D5/00—Sulfates or sulfites of sodium, potassium or alkali metals in general
- C01D5/02—Preparation of sulfates from alkali metal salts and sulfuric acid or bisulfates; Preparation of bisulfates
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05D—INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C; FERTILISERS PRODUCING CARBON DIOXIDE
- C05D1/00—Fertilisers containing potassium
- C05D1/02—Manufacture from potassium chloride or sulfate or double or mixed salts thereof
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D15/00—Handling or treating discharged material; Supports or receiving chambers therefor
- F27D15/02—Cooling
-
- 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
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Metallurgy (AREA)
- Fertilizers (AREA)
Abstract
The invention discloses a kind of mannheim furnace production potassium sulfate fertilizer pusher of discharging cooler, belong to potassium sulfate fertilizer production technical field.The pusher is structure as a whole, including outside corrosion resistant alloy material and the silicon carbide ceramics block that is embedded within corrosion resistant alloy material；The pusher has pusher end and welding ends, and the pusher end is used to release the potassium sulfate fertilizer entered in discharging cooler, and the welding ends is welded on the main shaft in discharging cooler.Pusher of the present invention is used in potassium sulfate fertilizer production process, can resist electrochemical corrosion and the destruction of physical abrasion, service life can meet the production run cycle completely.Production efficiency is substantially increased, the energy has been saved again, production cost is reduced, is a kind of preferable potassium sulfate fertilizer production equipment critical piece.
Description
Technical field
The present invention relates to potassium sulfate fertilizer production technical field, and in particular to a kind of mannheim furnace production potassium sulfate fertilizer is used
The pusher of discharging cooler.
Background technology
At present, in vast rural area, soil compaction phenomenon is more universal, and its reason is how relevant with a large amount of chemical fertilizer of applying, at present
In the composite fertilizer applied, potassium chloride being used potash fertilizer, this chemical fertilizer chronic administration not only can be unfavorable to some crops, can also more
Soil is set to produce hardened phenomenon.
Potassium sulfate fertilizer is a kind of high-quality chlorideless potassic fertilizer, the potash fertilizer of chloride can be avoided as tobacco, beet, fruit etc., together
When give crop to provide two kinds of nutrients of potassium and sulphur, the use of potassium sulfate can substantially improve the quality for avoiding chloride, improve agricultural economy
Benefit.Meanwhile, potassium sulfate is mixed according to different ratios and nitrogenous fertilizer, phosphate fertilizer etc., a variety of composite fertilizers just can be produced, apply
After this composite fertilizer, the production needs of crop can be not only met, can also greatly alleviate hardenedization of soil.Therefore, it is domestic
Outer to have built large quantities of potassium sulfate fertilizer production bases, the country just has various schools of thinkers potassium sulfate fertilizer to produce company at present.
The method of production potassium sulfate mainly has three major types in the world：The first kind is to extract potassium sulfate using salt lake bittern, should
The potassium sulfate amount that production method is provided accounts for 10-15%；Equations of The Second Kind is to process potassium sulfate using soluble sulphate ore deposit；The
Three classes are then that, using Mannheim proeess production, Mannheim proeess is exactly to decompose KCl production potassium sulfate using the concentrated sulfuric acid.World's sulfuric acid
Potassium yield more than 50% is all produced by Mannheim proeess, and China is then more than 70%.
Mannheim furnace is the nucleus equipment that Mannheim proeess produces potassium sulfate.Potassium chloride is put into stove, and sulfuric acid is uniform
Cloth be sprinkled upon in potassium chloride, fully reacted in 520 ° of conditions of high temperature, just can produce potassium sulfate fertilizer.Potassium sulfate passes through
After discharging opening, after being cooled down into discharging cooler, then crushing system delivered to by conveyer belt, the potassium sulfate after crushing is through counting
Turn into potassium sulfate finished product after amount packaging.
In the structure of existing discharging cooler, including the main shaft that can be rotated, the block of welding metal material on main shaft,
With the rotation of main shaft, the block on main shaft promotes potassium sulfate fertilizer from one end of discharging cooler to the other end, Jin Ercong
The cooler that discharges is interior to discharge.
In potassium sulfate fertilizer production process is carried out using Mannheim sea, due to the specific technological process of production, discharge cold
But device is as the capital equipment of production line, and particularly discharge the interior pusher part for being used to promote potassium sulfate fertilizer to discharge of cooler, long
Phase is in harsh corrosive environment, not only to be destroyed by electrochemical corrosion, also to be resisted the higher high-temperature sulfuric acid potassium of hardness
The abrasion of chemical fertilizer granule, therefore, is just lost serious in a short time.The pusher of current traditional common, due to being given birth to potassium sulfate fertilizer
Produce work condition environment and technological process understanding is not enough, it is unclear that its corrosion mechanism, so the higher anti-corrosion conjunction of pursuit cost simply
Gold, the actually alloy material selected by it, are difficult to resist its electrochemical corrosion and physical abrasion, geomery is designed not in addition
When causing pusher seriously corroded, very short using run time, production efficiency is low.The pusher device filled at the beginning of one, general shape
Row access cycle is only 3-6 individual month (such as Fig. 1) under state, under special state, the continuous service life only one phenomenon of many months
It occur frequently that, it is therefore necessary to stop production and changed, directly affects potassium sulfate fertilizer production efficiency and yield, substantially increase life
Cost is produced, and replacing environment is extremely severe, labor intensity is very big.
Therefore, the pusher in a kind of discharging cooler that can be for a long time used in potassium sulfate fertilizer production line is researched and developed,
Meet the operation usage cycles of relative ideal, improve the production efficiency of potassium sulfate fertilizer enterprise, reduce cost, as at present urgently
The technical problem of solution.
The content of the invention
For weak point present in present technology, sulfuric acid is produced it is an object of the invention to provide a kind of mannheim furnace
The potassium fertilizer pusher of discharging cooler, by the ingehious design to its structure and the improvement to material etc., is greatly enhanced
The electrochemical corrosion resistant of pusher and resistance physical abrasion performance in the discharging cooler, so as to improve potassium sulfate fertilizer life
Produce efficiency.
To achieve the above object, the technical solution adopted in the present invention is as follows：
A kind of pusher of mannheim furnace production potassium sulfate fertilizer discharging cooler, the pusher is structure as a whole, wrapped
The silicon carbide ceramics block for including the corrosion resistant alloy material of outside and being embedded within corrosion resistant alloy material；The pusher has pusher
End and welding ends, the pusher end are used to release the potassium sulfate fertilizer entered in discharging cooler, and the welding ends is welded in
On the main shaft discharged in cooler.
The corrosion resistant alloy material is ferrochrome, and chromium content is 8-15w t.% in the ferrochrome.
The preparation process of the silicon carbide ceramics block is as follows：At additive needed for sic powder (such as B and C), press
According to required geometry compression molding, after pressureless sintering under the conditions of 2200-2600 DEG C, that is, silicon carbide ceramics block is obtained, its
With excellent wearability and decay resistance.
The silicon carbide ceramics block, which is buried, to be cast from and (is embedded in by burying casting process) inside the pusher end；When the pusher enters
During row pusher, potassium sulfate fertilizer first denudes the corrosion resistant alloy material outside the pusher end, and then regrinds erosion silicon carbide ceramics.
The silicon carbide ceramics block is provided with some through-core holes (be preferably three), and it sets purpose to be to make to cast burying
Make the combination of thyrite and corrosion resistant alloy material more firm in journey.
It is described that to bury casting process as follows：Silicon carbide ceramics block is placed in mould, cast ferrochrome in the die cavity of mould
Melt, is stripped after cooling and shaping, and the whole workpiece after demoulding obtains the pusher after being heat-treated；The heat treatment work
Skill is：Workpiece after demoulding is handled 3 hours under the conditions of 950 DEG C, makes ferrochrome tissue austenitizing, is then quenched again
Fiery (950-980 DEG C), then naturally cool to room temperature after 200-230 DEG C of temper.Through the ferrochrome after above-mentioned heat treatment
Material can reach high corrosion-resistant and high-wear resistance.
The pusher is welded on the main shaft in the discharging cooler by welding ends, pusher in each discharging cooler
The quantity of device is 10-30, and each pusher is arranged in the shape of a spiral along main shaft.When the shaft rotates, pusher will discharge cooler
Interior potassium sulfide product is released.
The welding ends of the pusher is provided with connecting hole provided with U-type groove mouthful, the side of the U-type groove mouthful, and U-type groove is intraoral to place
Metal weld tabs, and it is passed through that the U-type groove that metal weld tabs is fixed on welding ends by connecting hole is intraoral, it is cold that the metal weld tabs is welded on discharging
But on the main shaft in device.
The present invention design principle and have the beneficial effect that：
1st, the present invention produces heavy corrosion environment for potassium sulfate fertilizer and combines its specific technological process, in potassium sulfate
The pusher process that chemical fertilizer enters in discharging cooler is innovated；Cost more cheap silicate material is employed first and low
Cost corrosion-resistant metallic material, and according to the carrying out practically state of equipment, according to hydromechanical principle, pusher structure is carried out
Design, two kinds of materials are perfectly organically combined on pusher, greatly improve electrochemical corrosion resistant and resistance physics mill
Corrosion energy and improve production efficiency.
2nd, the material-pulling device in existing discharging cooler typically uses alloy material, and researcher is all more resistance to from how to select
The wear-resisting alloy material of erosion, which is started with, to be improved, but potassium sulfate fertilizer has serious electrochemical corrosion and physics mill to pusher workpiece
Erosion, the abrasion resistance of alloy material is limited.The of the invention then limitation for thinking of breaking the normal procedure, is not from overall alternate material
Angle goes to consider, and the mode of the silicon carbide ceramics for the pusher end embedding erosion resistant being utilized in alloy material, during pusher, first
Alloy material outside abrasion, regrinds the thyrite with extremely strong wear-corrosion resistance inside erosion, greatly improves
The service life of pusher.
3rd, present invention use buries casting process and silicon carbide ceramics block is embedded in into ferrochrome material internal, in pusher
Welding ends is all alloy material, in favor of the welding with the cooler inner main axis that discharge.
4th, the pusher in present invention discharging cooler, during potassium sulfate production, greatly extends it and uses the longevity
Life, through nearly 1 year of running experiment in potassium sulfate fertilizer manufacturing enterprise equipment, operation use state is intact, fully achieves (one
Individual overhaul time is a year and a half) preferable usage cycles.Production efficiency is improved, production cost is reduced.
Brief description of the drawings
Fig. 1 is continuously producing trimestral abrasion situation photo figure for material-pulling device in existing discharging cooler.
Fig. 2 is the pusher structural representation in present invention discharging cooler.
Fig. 3 is the pusher structural representation (lateral plan for corresponding to Fig. 2) in present invention discharging cooler.
Fig. 4 is the silicon carbide ceramics block structure schematic diagram in the pusher in present invention discharging cooler.
The silicon carbide ceramics block photo figure of casting is buried in the pusher that Fig. 5 discharges in cooler for the present invention.
The photo figure in kind for the pusher that Fig. 6 discharges in cooler for the present invention.
In figure：1- pushers end；2- welding ends；3-U type grooves mouthful；4- connecting holes；5- silicon carbide ceramics blocks；6- through-core holes.
Embodiment
The present invention is described in detail below in conjunction with drawings and examples.
The present invention produces the pusher of potassium sulfate fertilizer discharging cooler for mannheim furnace, and it is using process：Man Hai
Potassium sulfate fertilizer is prepared in nurse stove, potassium sulfate is cooled down, by discharging after mannheim furnace discharging opening in feeding discharging cooler
Pusher in cooler releases potassium sulfate, then is crushed and packed by conveyer belt submitting, becomes potassium sulfate finished product.
The preparation process of pusher of the present invention is：According to design drawing, according to its geomery, produce to meet first
The silicate ceramics workpiece (silicon carbide ceramics block) of designing technique index performance, and by the method for casting, its is intact
Casting is buried among corrosion-resistant metallic material, then by Technology for Heating Processing processing, makes up to optimal using effect.
As Figure 2-3, the pusher 5 is variable cross-section column integrative-structure to pusher structure of the present invention, including outside
Corrosion resistant alloy material and the silicon carbide ceramics block 5 being embedded within corrosion resistant alloy material；The butt end of the pusher is pusher end
1, taper end is welding ends 2, and the pusher end 1 is used to release the potassium sulfate fertilizer entered in discharging cooler, the welding ends 2
It is welded on the main shaft in discharging cooler.
The corrosion resistant alloy material is preferably ferrochrome, and chromium content is 8-15wt.% in the ferrochrome.
The preparation process of the silicon carbide ceramics block 5 is as follows：At additive needed for sic powder (such as B and C), press
According to required geometry compression molding, after pressureless sintering under the conditions of 2200-2600 DEG C, that is, silicon carbide ceramics block 5 is obtained, its
With excellent wearability and decay resistance.
The silicon carbide ceramics block 5 is embedded in inside the pusher end 1 by burying casting process；When the pusher carries out pusher
When, potassium sulfate fertilizer first denudes the corrosion resistant alloy material outside the pusher end 1, and then regrinds erosion silicon carbide ceramics.
The silicon carbide ceramics block be provided with some through-core holes 6, preferably three, as illustrated in figures 4-5.The through-core hole 6
Setting purpose be make bury casting during make the combination of thyrite and corrosion resistant alloy material more firm.
It is described that to bury casting process as follows：Silicon carbide ceramics block is placed in mould, cast ferrochrome in the die cavity of mould
Melt, 1380-1410 DEG C of pouring temperature is stripped after cooling and shaping, the whole workpiece after demoulding is heat-treated, and is heat-treated work
Skill is：Handled 3 hours at 950 DEG C first, make ferrochrome tissue austenitizing, quenching 2-4 is then carried out at 950-980 DEG C small
When, then naturally cool to room temperature after 2-4 hours through 200-230 DEG C of temper, that is, the pusher is obtained, as shown in Figure 6.Through
Ferrochrome material after above-mentioned heat treatment can reach high corrosion-resistant and high-wear resistance.
The pusher is welded on the main shaft in the discharging cooler by welding ends 2, is pushed away in each discharging cooler
The quantity of glassware is 10-30, and each pusher is arranged in the shape of a spiral along main shaft.When the shaft rotates, pusher will discharge and cool down
Potassium sulfide product in device is released.
The welding ends of the pusher is provided with connecting hole 4, U-type groove mouthful 3 provided with U-type groove mouthful 3, the side of U-type groove mouthful 3
Metal weld tabs is placed, and is passed through connecting hole 4 metal weld tabs is fixed in the U-type groove of welding ends mouthful 3, the metal weld tabs is welded on
On the main shaft discharged in cooler.
The pusher of said structure of the present invention, can not only meet resistance potassium sulfate fertilizer and produce severe corrosive environment to pushing away
Electrochemical corrosion and the destruction of physical abrasion that glassware is caused, are greatly improved production efficiency again, save the energy, reduce production
Cost, production run service life is up to more than a year and a half.
Examples detailed above is only referred to, with photo-deformable that is similar with this patent or extending from this patent thinking
Material and its preparation method and application, the protection domain in this patent.
Claims (8)
1. a kind of pusher of mannheim furnace production potassium sulfate fertilizer discharging cooler, it is characterised in that：The pusher is one
Body structure, including outside corrosion resistant alloy material and the silicon carbide ceramics block that is embedded within corrosion resistant alloy material；The pusher
Utensil has pusher end and welding ends, and the pusher end is used to release the potassium sulfate fertilizer entered in discharging cooler, the weldering
Connect on the main shaft that end is welded in discharging cooler.
2. the pusher of mannheim furnace production potassium sulfate fertilizer discharging cooler according to claim 1, its feature exists
In：The corrosion resistant alloy material is ferrochrome, and chromium content is 8-15wt.% in the ferrochrome.
3. the pusher of mannheim furnace production potassium sulfate fertilizer discharging cooler according to claim 1, its feature exists
In：The preparation process of the silicon carbide ceramics block is as follows：In additive needed for sic powder, according to required geometry
Compression molding, after pressureless sintering under the conditions of 2200-2600 DEG C, that is, obtains silicon carbide ceramics block, it has excellent wear-resisting
Property and decay resistance.
4. the pusher of mannheim furnace production potassium sulfate fertilizer discharging cooler according to claim 2, its feature exists
In：The silicon carbide ceramics block, which is buried, to be cast from inside the pusher end；When the pusher carries out pusher, potassium sulfate fertilizer is first ground
The corrosion resistant alloy material outside the pusher end is lost, and then regrinds erosion silicon carbide ceramics.
5. the pusher of mannheim furnace production potassium sulfate fertilizer discharging cooler according to claim 4, its feature exists
In：The silicon carbide ceramics block is provided with some through-core holes, and it sets purpose to be to make silicon carbide ceramics material during casting is buried
The combination of material and corrosion resistant alloy material is more firm.
6. the mannheim furnace production potassium sulfate fertilizer pusher of discharging cooler according to claim 4 or 5, its feature
It is：It is described that to bury casting process as follows：Silicon carbide ceramics block is placed in mould, cast ferrochrome melts in the die cavity of mould
Body, is stripped after cooling and shaping, and the whole workpiece after demoulding obtains the pusher after being heat-treated；The Technology for Heating Processing
For：Workpiece after demoulding is handled 3 hours under the conditions of 950 DEG C, makes ferrochrome tissue austenitizing, then in 950-980
DEG C quenched, then room temperature is naturally cooled to after 200-230 DEG C of temper.Ferrochrome material after above-mentioned heat treatment
It can reach high corrosion-resistant and high-wear resistance.
7. the pusher of mannheim furnace production potassium sulfate fertilizer discharging cooler according to claim 1, its feature exists
In：The pusher is welded on the main shaft in the discharging cooler by welding ends, pusher in each discharging cooler
Quantity is 10-30, and each pusher is arranged in the shape of a spiral along main shaft；When the shaft rotates, pusher will discharge in cooler
Potassium sulfide product is released.
8. the pusher of mannheim furnace production potassium sulfate fertilizer discharging cooler according to claim 7, its feature exists
In：The welding ends of the pusher is provided with connecting hole, the intraoral placement metal of U-type groove provided with U-type groove mouthful, the side of the U-type groove mouthful
Weld tabs, and it is passed through that the U-type groove that metal weld tabs is fixed on welding ends by connecting hole is intraoral, the metal weld tabs is welded on discharging cooler
On interior main shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710317058.2A CN107098125A (en) | 2017-05-08 | 2017-05-08 | A kind of pusher of mannheim furnace production potassium sulfate fertilizer discharging cooler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710317058.2A CN107098125A (en) | 2017-05-08 | 2017-05-08 | A kind of pusher of mannheim furnace production potassium sulfate fertilizer discharging cooler |
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| CN107098125A true CN107098125A (en) | 2017-08-29 |
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| CN201710317058.2A Pending CN107098125A (en) | 2017-05-08 | 2017-05-08 | A kind of pusher of mannheim furnace production potassium sulfate fertilizer discharging cooler |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110640113A (en) * | 2019-09-09 | 2020-01-03 | 中国石油天然气集团有限公司 | Lead mold pouring device and lead mold manufacturing method |
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| CN205367753U (en) * | 2015-12-30 | 2016-07-06 | 山东赫达股份有限公司 | Special cooling material pushing trolley of potassium sulphide |
| US20160376417A1 (en) * | 2009-04-29 | 2016-12-29 | Tundra Composites, LLC | Inorganic Material Composite |
| CN207046280U (en) * | 2017-05-08 | 2018-02-27 | 张元利 | A kind of pusher of mannheim furnace production potassium sulfate fertilizer discharging cooler |
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2017
- 2017-05-08 CN CN201710317058.2A patent/CN107098125A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201292255Y (en) * | 2008-09-26 | 2009-08-19 | 徐秀芳 | Stuff pulling cooling unit |
| US20160376417A1 (en) * | 2009-04-29 | 2016-12-29 | Tundra Composites, LLC | Inorganic Material Composite |
| CN104726734A (en) * | 2013-12-20 | 2015-06-24 | 中国科学院上海硅酸盐研究所 | Preparation method of silicon carbide reinforced aluminum base composite material |
| CN205074105U (en) * | 2015-09-23 | 2016-03-09 | 济南瀚瑞糸机械设备制造有限公司 | Wear -resisting spiral of spiral shell centrifugal separator for sleeping in |
| CN205367753U (en) * | 2015-12-30 | 2016-07-06 | 山东赫达股份有限公司 | Special cooling material pushing trolley of potassium sulphide |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110640113A (en) * | 2019-09-09 | 2020-01-03 | 中国石油天然气集团有限公司 | Lead mold pouring device and lead mold manufacturing method |
| CN110640113B (en) * | 2019-09-09 | 2021-03-09 | 中国石油天然气集团有限公司 | Lead mold pouring device and lead mold manufacturing method |
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