CN117161053A - Method for recycling low-permeability metal particles from investment casting waste shell film - Google Patents
Method for recycling low-permeability metal particles from investment casting waste shell film Download PDFInfo
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- CN117161053A CN117161053A CN202311295201.4A CN202311295201A CN117161053A CN 117161053 A CN117161053 A CN 117161053A CN 202311295201 A CN202311295201 A CN 202311295201A CN 117161053 A CN117161053 A CN 117161053A
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- shell film
- investment casting
- metal particles
- materials
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- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000005495 investment casting Methods 0.000 title claims abstract description 28
- 239000002923 metal particle Substances 0.000 title claims abstract description 22
- 239000002699 waste material Substances 0.000 title abstract description 16
- 238000004064 recycling Methods 0.000 title abstract description 10
- 239000000463 material Substances 0.000 claims abstract description 29
- 230000005291 magnetic effect Effects 0.000 claims abstract description 15
- 238000000498 ball milling Methods 0.000 claims abstract description 11
- 239000012535 impurity Substances 0.000 claims abstract description 9
- 210000000998 shell membrane Anatomy 0.000 claims abstract description 6
- 239000003302 ferromagnetic material Substances 0.000 claims abstract description 4
- 238000007873 sieving Methods 0.000 claims abstract description 3
- 230000035699 permeability Effects 0.000 claims description 13
- 229910052751 metal Inorganic materials 0.000 abstract description 25
- 239000002184 metal Substances 0.000 abstract description 25
- 229910000831 Steel Inorganic materials 0.000 abstract description 10
- 239000010959 steel Substances 0.000 abstract description 10
- 239000002245 particle Substances 0.000 abstract description 6
- 229910000851 Alloy steel Inorganic materials 0.000 abstract description 3
- 150000002739 metals Chemical class 0.000 abstract description 3
- 229910001220 stainless steel Inorganic materials 0.000 abstract description 3
- 239000010935 stainless steel Substances 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 235000010627 Phaseolus vulgaris Nutrition 0.000 description 6
- 244000046052 Phaseolus vulgaris Species 0.000 description 6
- 229910000617 Mangalloy Inorganic materials 0.000 description 4
- 238000005266 casting Methods 0.000 description 4
- 239000011362 coarse particle Substances 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000008235 industrial water Substances 0.000 description 3
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 230000005389 magnetism Effects 0.000 description 2
- 229910052863 mullite Inorganic materials 0.000 description 2
- 238000000053 physical method Methods 0.000 description 2
- 239000011819 refractory material Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 239000010431 corundum Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- -1 etc. Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 230000000475 sunscreen effect Effects 0.000 description 1
- 239000000516 sunscreening agent Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 229910052845 zircon Inorganic materials 0.000 description 1
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 description 1
Abstract
The invention relates to the technical field of environmental protection, in particular to a method for recycling low-permeability metal particles from an investment casting waste shell film; comprises the steps of manually sorting the shell film and removing other impurities; feeding the shell membrane subjected to manual sorting into a crusher for crushing to obtain crushed materials; the obtained crushed materials collect ferromagnetic materials through a belt conveyor, and the rest materials enter a linear vibrating screen; manually sorting the oversize materials of the linear vibrating screen, ball milling the undersize materials in a ball mill, and sieving again; the invention carries out physical treatment by investment casting of the waste shell film, can obtain low magnetic conductivity valuable metals such as heat-resistant steel, stainless steel, high alloy steel and the like, and meanwhile, the treated shell film has low metal content and can be used for multiple times; compared with the shaking table process, the method has the advantages that water is not used completely, the treated flash is pressed into metal spherical or round particles, the surface quality is good, and the method can be directly used as a furnace return material.
Description
Technical Field
The invention relates to the technical field of environmental protection, in particular to a method for recycling low-permeability metal particles from an investment casting waste shell film.
Background
The precision casting technology has the characteristics of high precision of parts, small required machining quantity, suitability for mass production, high casting quality and the like, and many complex small and medium-sized parts adopt investment casting technology, so the precision casting technology has great competitive advantage, particularly parts made of stainless steel, heat-resistant steel, high alloy steel, cast copper and the like, part of inner cavities are difficult to machine, and only investment casting methods can be selected, so the most fields are the metal forming aspect with higher added value of products or more noble materials. On the other hand, in the casting process, the casting is inevitably splashed, molten steel permeates into the shell film to form burrs, burrs and the like. After the shelling is performed through vibration, the shell film contains a plurality of metals. In particular, fluidity is poor, casting temperature is high such as heat-resistant steel, etc., and metal content sometimes reaches 5% or more of the waste shell film without manual sorting. However, by manual sorting, only 1-2 large burrs can be obtained, and the large burrs are adhered with the shell film, so that the mode is neither scientific nor efficient along with the increasing of labor cost. The gravity flotation method of the shaking table beneficiation also has the problems that a large amount of industrial water is consumed, the drying cost of the waste shell film is high, the recovered metal needs to be dried and the like, and the shell film material is often wrapped in the flash and is difficult to dry completely.
Accordingly, the present invention provides a method for recovering low magnetic permeability metal particles from investment casting spent shell films, which solves the above-mentioned related technical problems.
Disclosure of Invention
The invention aims to provide a method for recycling low-permeability metal particles from an investment casting waste shell film, which is characterized in that the investment casting waste shell film is treated in a physical mode, so that low-permeability valuable metals such as heat-resistant steel, stainless steel, high alloy steel and the like can be obtained, meanwhile, the metal content in the treated shell film is low, and the shell film material can be reused for multiple times; compared with the shaking table process, the method has the advantages that water is not used completely, the treated flash is pressed into metal spherical or round particles, the surface quality is good, and the method can be directly used as a furnace return material.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the invention provides a method for recycling low-permeability metal particles from an investment casting waste shell film, which comprises the following steps:
i, manually sorting the shell film, and removing other impurities;
II, conveying the shell membrane subjected to manual sorting into a crusher for crushing to obtain crushed materials;
III, collecting ferromagnetic materials from the obtained crushed materials through a belt conveyor, and enabling the rest materials to enter a linear vibrating screen;
IV, manually sorting the oversize materials of the linear vibrating screen, and sieving again after the undersize materials enter a ball mill for ball milling.
The invention is further provided with: in the step II, the crusher adopts cone breaking, the feeding speed is 2t/hr, the shell film is ensured to be uniformly crushed, and large burrs are basically agglomerated.
The invention is further provided with: in the step II, the granularity of the crushed materials is 2-150 meshes.
The invention is further provided with: in the step III, a 6000-gauss and 12000-gauss magnetic roller is arranged on the conveying belt conveyor, so that the magnetic metal such as steel shots in the conveying belt conveyor is ensured not to be carried into the next working procedure.
The invention is further provided with: in the step III, the screen mesh of the linear vibrating screen is 10-20 meshes.
The invention is further provided with: in the step IV, the undersize material enters a ball mill for ball milling to be less than 160 meshes.
The invention is further provided with: in the step IV, the sifting screen is any one of an ultrasonic vibration screen and a swinging screen.
The invention is further provided with: the sieve is a 160-mesh sieve, small flash edges in the oversize are sieved, burrs are made into spherical or elliptic metal by grinding balls, the spherical or elliptic metal is reserved on a sun screen, and the rest extremely fine iron powder and a shell film are packaged and used as high-quality refractory materials; the metal beans are obtained from the oversize material, and the finer non-magnetic metal powder is mixed with the refractory material of the shell film, so that the shell film contains less than 1% of metal powder, the yield of the non-magnetic valuable metal is 3.5-4%, and the recovery rate is more than 70-80%.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a method for recycling low magnetic permeability metal particles from an investment casting waste shell film, which comprises the whole process physical methods of crushing granularity, removing iron impurities and the like, does not use industrial water, utilizes a cone to crush the shell film, controls the crushing granularity, obtains first coarse particle metal through a 10-20-mesh linear vibrating screen, then enters a dry ball mill for ball milling for 4 hours after the screen lower part, and then is screened through an ultrasonic vibrating screen or a swinging screen to obtain small particle size metal in the screen upper part, wherein the metal particles are basically spherical or elliptic, and the surface is clean and bright and does not contain other impurities. The method for recycling the low-permeability metal particles from the investment casting waste shell film provided by the invention has a wider market prospect and is more suitable for popularization.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a method of recovering low permeability metal particles from investment casting spent shell films according to the present invention.
Detailed Description
The following description of the technical solutions in the embodiments of the present invention will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
As shown in fig. 1, this example provides a method for recovering heat-resistant steel beans from heat-resistant steel investment casting waste shell films. The shell membrane refractory aggregate comprises the following components: white corundum surface layer and mullite. The shell film is first manually sorted to remove other impurities such as slag mixed in the site without steam dewaxing. Then enters a cone crusher for crushing, and the feeding speed is controlled. The broken shell film is collected by a belt conveyor and a magnetic roller with a strong magnetic field, the rest materials enter a linear vibrating screen, coarse particles are primarily screened out, coarse particle metal beans are obvious, and the steel shots are manually sorted. And (3) allowing undersize materials to enter a ball mill for ball milling for more than 4 hours, screening by using a 160-mesh screen, and reserving small-particle metal beans on a vibrating screen to obtain the small-particle metal. The undersize is shell membrane powder, mainly mullite and zircon powder, and very little fine iron powder. Thereby completing the whole extraction process.
Example 2
As shown in fig. 1, the embodiment provides a method for recycling metal beans from a high manganese steel Rong Mu precision casting waste shell film for an air conditioner compressor. And (3) manually sorting, removing other impurities, crushing the shell film in a cone crusher, and only sucking ferromagnetic materials such as steel shots by a magnetic roller on the conveying belt due to weak magnetism of high manganese steel. Then the mixture is put into a linear vibrating screen, ball milling is carried out, a 160-mesh screen is put after ball milling is carried out for 4 hours, and meanwhile, magnetic beads are placed on the screen. Thus, the undersize is substantially all of the shell membrane component, and the high manganese steel beans are all on the screen or adsorbed at the lower end of the screen. Because the high manganese steel is normally weak in magnetism, but after ball milling, the metallographic structure is changed, the austenite part is converted into martensite, and the magnetic permeability is enhanced, so that the yield ratio is higher.
From the above, the method for recovering low magnetic permeability metal particles from the investment casting waste shell film provided by the invention comprises the whole process physical methods of crushing granularity, removing iron impurities and the like, and does not use industrial water, the crushing shell film is crushed by utilizing a cone, the crushing granularity is controlled, the first coarse particle metal is obtained through a 10-20-mesh linear vibrating screen, the undersize enters a dry ball mill, ball milling is carried out for 4 hours, and then the undersize is sieved through an ultrasonic vibrating screen or a swinging screen, so that the small particle metal in the undersize is obtained, and the metal particles are basically spherical or elliptical, have clean and bright surfaces and do not contain other impurities. Therefore, the method for recycling the low-permeability metal particles from the investment casting waste shell film has wider market prospect and is more suitable for popularization.
In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended only to assist in the explanation of the invention. The preferred embodiments are not exhaustive or to limit the invention to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best understand and utilize the invention. The invention is limited only by the claims and the full scope and equivalents thereof.
Claims (8)
1. A method for recovering low magnetic permeability metal particles from investment casting spent shell film, comprising the steps of:
i, manually sorting the shell film, and removing other impurities;
II, conveying the shell membrane subjected to manual sorting into a crusher for crushing to obtain crushed materials;
III, collecting ferromagnetic materials from the obtained crushed materials through a belt conveyor, and enabling the rest materials to enter a linear vibrating screen;
IV, manually sorting the oversize materials of the linear vibrating screen, and sieving again after the undersize materials enter a ball mill for ball milling.
2. A method of recovering low permeability metal particles from investment casting spent shell film as recited in claim 1 wherein: in the step II, the crusher adopts cone breaking, and the feeding speed is 2t/hr.
3. A method of recovering low permeability metal particles from investment casting spent shell film as recited in claim 1 wherein: in the step II, the granularity of the crushed materials is 2-150 meshes.
4. A method of recovering low permeability metal particles from investment casting spent shell film as recited in claim 1 wherein: in the step III, a 6000-gauss 12000-gauss magnetic roller is arranged on the conveying belt conveyor.
5. A method of recovering low permeability metal particles from investment casting spent shell film as recited in claim 1 wherein: in the step III, the screen mesh of the linear vibrating screen is 10-20 meshes.
6. A method of recovering low permeability metal particles from investment casting spent shell film as recited in claim 1 wherein: in the step IV, the undersize material enters a ball mill for ball milling to be less than 160 meshes.
7. A method of recovering low permeability metal particles from investment casting spent shell film as recited in claim 1 wherein: in the step IV, the sifting screen is any one of an ultrasonic vibration screen and a swinging screen.
8. A method of recovering low permeability metal particles from investment casting spent shell films as recited in claim 7 wherein: the screen is a 160 mesh screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311295201.4A CN117161053A (en) | 2023-10-09 | 2023-10-09 | Method for recycling low-permeability metal particles from investment casting waste shell film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311295201.4A CN117161053A (en) | 2023-10-09 | 2023-10-09 | Method for recycling low-permeability metal particles from investment casting waste shell film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117161053A true CN117161053A (en) | 2023-12-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311295201.4A Pending CN117161053A (en) | 2023-10-09 | 2023-10-09 | Method for recycling low-permeability metal particles from investment casting waste shell film |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117161053A (en) |
-
2023
- 2023-10-09 CN CN202311295201.4A patent/CN117161053A/en active Pending
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