CN111204795A - Indirect zinc oxide self-heating production system - Google Patents
Indirect zinc oxide self-heating production system Download PDFInfo
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- CN111204795A CN111204795A CN202010117566.8A CN202010117566A CN111204795A CN 111204795 A CN111204795 A CN 111204795A CN 202010117566 A CN202010117566 A CN 202010117566A CN 111204795 A CN111204795 A CN 111204795A
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- zinc oxide
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- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 title claims abstract description 94
- 238000010438 heat treatment Methods 0.000 title claims abstract description 84
- 239000011787 zinc oxide Substances 0.000 title claims abstract description 47
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 91
- 238000003860 storage Methods 0.000 claims abstract description 34
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 33
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 33
- 239000010439 graphite Substances 0.000 claims abstract description 33
- 238000000034 method Methods 0.000 claims abstract description 31
- 238000001816 cooling Methods 0.000 claims abstract description 19
- 238000007789 sealing Methods 0.000 claims description 31
- 238000002347 injection Methods 0.000 claims description 20
- 239000007924 injection Substances 0.000 claims description 20
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 16
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 16
- 239000002245 particle Substances 0.000 claims description 16
- 239000000292 calcium oxide Substances 0.000 claims description 8
- 235000012255 calcium oxide Nutrition 0.000 claims description 8
- 229910052725 zinc Inorganic materials 0.000 claims description 8
- 239000011701 zinc Substances 0.000 claims description 8
- 238000000151 deposition Methods 0.000 claims description 5
- 210000001503 joint Anatomy 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 19
- 239000007789 gas Substances 0.000 description 11
- 239000008187 granular material Substances 0.000 description 7
- 238000000926 separation method Methods 0.000 description 4
- 239000000428 dust Substances 0.000 description 3
- 239000008236 heating water Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 244000144972 livestock Species 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000011087 paperboard Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G9/00—Compounds of zinc
- C01G9/02—Oxides; Hydroxides
- C01G9/03—Processes of production using dry methods, e.g. vapour phase processes
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a self-heating production system of indirect-method zinc oxide, relates to the technical field of indirect-method zinc oxide production, and aims to solve the problem that the existing indirect-method zinc oxide needs to be heated by heating equipment in the production process, and production operation cannot be carried out without the heating equipment, so that the limitation is large. The improved water heater is characterized in that a water inlet pipe is arranged on the outer wall of one side of the heating box, a graphite crucible is arranged inside the heating box, a water pump is arranged on one side of the heating box, a water storage box is arranged on one side of the water pump, a storage box is arranged on the other side of the heating box, a cyclone separator is arranged on one side of the storage box, a mounting support is arranged at the lower end of the cyclone separator, a supporting plate is arranged on the outer wall of one side of the mounting support and is welded and connected with the mounting support, and a cooling conveying pipe is arranged at the upper end.
Description
Technical Field
The invention relates to the technical field of indirect-method zinc oxide production, in particular to a self-heating indirect-method zinc oxide production system.
Background
Indirect zinc oxide, also known as french zinc oxide, was promoted by french scientist lechleri in 1844. The zinc oxide production method is divided into direct and indirect methods. Indirect process zinc oxide, which as its name suggests is a product made by an indirect process. The indirect method generally uses zinc ingots as raw materials, the zinc ingots are converted into zinc vapor at the high temperature of 1000 ℃ in a graphite crucible, and then the zinc vapor is oxidized by blown air to generate zinc oxide, and zinc oxide particles are collected after a cooling pipe to obtain the product, and the zinc oxide prepared by the indirect method can be used in the industries of rubber, piezoresistors, paint, phosphating solution, films, heat conduction materials, catalysts and the like. The product with low heavy metal content can also be used in livestock feed, medicine, health care and other industries, and the indirect oxidation is packaged by a paperboard barrel or an iron barrel with a plastic lining for replacing the plastic, and is stored in a cool and ventilated storehouse.
The existing indirect method zinc oxide needs to be heated by heating equipment in the production process, and production operation cannot be carried out without the heating equipment, so that the greater limitation exists.
Disclosure of Invention
The invention aims to provide an indirect-method zinc oxide self-heating production system, which aims to solve the problem that the existing indirect-method zinc oxide provided by the background art needs to be heated by heating equipment in the production process, and cannot be produced and operated without the heating equipment, so that the production operation is greatly limited.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an indirect method zinc oxide self-heating formula production system, includes the heating cabinet, be provided with the inlet tube on one side outer wall of heating cabinet, the inside of heating cabinet is provided with graphite crucible, one side of heating cabinet is provided with the water pump, one side of water pump is provided with the water storage box, the opposite side of heating cabinet is provided with deposits the case, one side of depositing the case is provided with cyclone, cyclone's lower extreme is provided with the installing support, be provided with the backup pad on the outer wall of installing support one side, and backup pad and installing support welded connection, the upper end of backup pad is provided with the cooling conveying pipe.
Preferably, the lower extreme of heating cabinet is provided with the drain pipe, be provided with the valve on the outer wall of drain pipe, and the valve passes through flange sealing connection with the drain pipe, the inside of heating cabinet is provided with the heated warehouses, and drain pipe and inlet tube all are linked together with the heated warehouses.
Preferably, the top of heated warehouses is provided with four marginal roofs, and four marginal roofs all with the inner wall welded connection of heated warehouses, the upper end of heated cabinet is provided with the case edge, the inside on case edge is provided with the constant head tank, and constant head tank and case edge structure as an organic whole.
Preferably, the upper end of the graphite crucible is provided with two pull handles, the pull handles and the graphite crucible are of an integrated structure, and a plurality of zinc ingots are arranged inside the graphite crucible.
Preferably, the water inlet end of the water pump is communicated with the inside of the water storage tank, the water outlet end of the water pump is in sealing butt joint with the water inlet pipe on the outer wall of one side of the heating tank through the water guide pipe, the upper end of the water storage tank is provided with the water injection pipe, and the water injection pipe is communicated with the inside of the water storage tank.
Preferably, a sealing cover is installed at the upper end of the water injection pipe, a sealing plug is arranged at the lower end of the sealing cover, a threaded outer wall is arranged on the outer wall of the sealing plug, the sealing plug is in rotary sealing connection with threads on the inner wall of the water injection pipe through the threaded outer wall, and a pull ring is arranged at the upper end of the sealing cover.
Preferably, a feeding pipeline is arranged on the outer wall of one side of the cyclone separator, an air blower is arranged on one side of the feeding pipeline, the air inlet end of the air blower is connected with one end of the cooling conveying pipe in a sealing mode, the air outlet end of the air blower is connected with the feeding pipeline in a sealing mode, and a feeding funnel is arranged at the other end of the cooling conveying pipe.
Preferably, the upper end of the cyclone separator is provided with a gas outlet, the lower end of the cyclone separator is provided with a particle discharge port, and the gas outlet and the particle discharge port are communicated with the inside of the cyclone separator.
Preferably, the inside of depositing the case is provided with the loading board, the upper end of loading board is provided with holds the pocket, the inside that holds the pocket is provided with quick lime.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention puts zinc ingot into graphite crucible, then takes out the mesh bag in the storage box, puts the mesh bag into the heating chamber in the heating box, puts the graphite crucible into the heating box, puts the graphite crucible above the edge top plate, the upper end of the graphite crucible is aligned with the positioning groove on the box edge, injects water into the water storage box through the water injection pipe for storage, then screws on the sealing cover, injects the water in the water storage box into the heating chamber in the heating box through the water guide pipe by the water pump, makes the water react violently with the quicklime through the mesh bag, releases a large amount of heat, utilizes the generated heat to carry out heating reaction on the zinc ingot in the graphite crucible, achieves the purpose of self-heating production, overcomes the defects that the prior indirect method zinc oxide needs to be heated by heating equipment in the production process, and cannot be produced without the heating equipment, there is a problem of great limitation.
2. Through pouring into the zinc oxide granule into feed hopper, the zinc oxide granule gets into cyclone through cooling conveying pipe under the effect of air-blower, and cyclone is with zinc oxide granule gas-solid separation, and the dust gas of separation discharges away through gas outlet, and indirect method zinc oxide granule discharges through the granule discharge port to reach the purpose of indirect method production zinc oxide.
3. Play the effect for graphite crucible heat supply through the heating cabinet that sets up, the drain pipe that the lower extreme of heating cabinet set up plays the effect of the inside heating water of discharge heated warehouses, and the valve that sets up on the outer wall of drain pipe plays the effect of controlling the drain pipe and opening and close and the flow, and the back is accomplished in the heating, opens the drain pipe through rotating the valve, with the inside heating water discharge of heated warehouses to will hold the pocket and take out, reach the purpose of self-heating type production back cleaning treatment.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the internal structure of the heating chamber of the present invention;
FIG. 3 is a schematic view showing the internal structure of a graphite crucible of the present invention;
FIG. 4 is a schematic view of the sealing cap of the present invention;
FIG. 5 is a schematic view of the internal structure of the storage case of the present invention;
FIG. 6 is a schematic view of a cyclone separator according to the present invention;
in the figure: 1. a heating box; 2. a water inlet pipe; 3. a drain pipe; 4. a valve; 5. a graphite crucible; 6. a water conduit; 7. a water pump; 8. a water storage tank; 9. a water injection pipe; 10. a sealing cover; 11. a storage box; 12. a cyclone separator; 13. a support plate; 14. a blower; 15. cooling the transfer tube; 16. a feed hopper; 17. an edge top plate; 18. a heating chamber; 19. a box edge; 20. positioning a groove; 21. pulling a handle; 22. a zinc ingot; 23. a sealing plug; 24. a threaded outer wall; 25. a pull ring; 26. a carrier plate; 27. a mesh bag is placed; 28. quick lime; 29. mounting a bracket; 30. a feed conduit; 31. a gas outlet; 32. a particle discharge port.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1-6, an embodiment of the present invention is shown: an indirect-method zinc oxide self-heating production system comprises a heating box 1, a water inlet pipe 2 is arranged on the outer wall of one side of the heating box 1, the water inlet pipe 2 plays a role of injecting water into a heating chamber 18, a graphite crucible 5 is arranged inside the heating box 1, the graphite crucible 5 plays a role of containing and heating zinc ingots, a water pump 7 is arranged on one side of the heating box 1, the water pump 7 plays a role of injecting water in a water storage tank 8 into the heating box 1, a water storage tank 8 is arranged on one side of the water pump 7, the water storage tank 8 plays a role of storing reaction water, a storage tank 11 is arranged on the other side of the heating box 1, the storage tank 11 plays a role of storing quicklime 28 and containing mesh bags 27, a cyclone separator 12 is arranged on one side of the storage tank 11, the cyclone separator 12 plays a role of gas-solid separation on zinc oxide particles, a mounting bracket 29 is arranged at the lower end of the cyclone separator 12, a support plate 13 is arranged, the supporting plate 13 plays a role in supporting the air blower 14 and the cooling conveying pipe 15, the supporting plate 13 is connected with the mounting bracket 29 in a welding mode, the cooling conveying pipe 15 is arranged at the upper end of the supporting plate 13, and the cooling conveying pipe 15 plays a role in cooling the zinc oxide.
Further, the lower extreme of heating cabinet 1 is provided with drain pipe 3, be provided with valve 4 on drain pipe 3's the outer wall, and valve 4 passes through flange sealing connection with drain pipe 3, the inside of heating cabinet 1 is provided with heated warehouses 18, and drain pipe 3 and inlet tube 2 all are linked together with heated warehouses 18, drain pipe 3 that the lower extreme of heating cabinet 1 set up plays the effect of the 18 inside heating water of discharge heated warehouses, valve 4 that sets up on drain pipe 3's the outer wall plays the effect that control drain pipe 3 opened and close and the flow.
Further, the top of heating cabinet 18 is provided with four marginal roof 17, and four marginal roof 17 all with the inner wall welded connection of heating cabinet 18, the upper end of heating cabinet 1 is provided with case edge 19, the inside of case edge 19 is provided with constant head tank 20, and constant head tank 20 and case edge 19 structure as an organic whole, four marginal roof 17 that the top of heating cabinet 18 set up play the effect of supporting graphite crucible 5, constant head tank 20 that the inside of case edge 19 set up plays and puts the effect of location to graphite crucible 5.
Further, the upper end of graphite crucible 5 is provided with two and draws handle 21, and draws handle 21 and graphite crucible 5 structure as an organic whole, and the inside of graphite crucible 5 is provided with a plurality of zinc ingot 22, and two of the upper end of graphite crucible 5 sets up draw handle 21 and play the effect of being convenient for draw graphite crucible 5, and a plurality of zinc ingot 22 that the inside of graphite crucible 5 set up plays the effect of generating zinc oxide.
Further, the end of intaking of water pump 7 is linked together with the inside of water storage box 8, the play water end of water pump 7 is through the sealed butt joint of inlet tube 2 on aqueduct 6 and the 1 one side outer wall of heating box, the upper end of water storage box 8 is provided with water injection pipe 9, and water injection pipe 9 is linked together with the inside of water storage box 8, water pump 7 plays the effect of injecting the water in the water storage box 8 into heated warehouses 18, the effect of water injection to water storage box 8 is played to water injection pipe 9 that the upper end of water storage box 8 set up.
Further, sealed lid 10 is installed to the upper end of water injection pipe 9, the lower extreme of sealed lid 10 is provided with sealing plug 23, be provided with screw thread outer wall 24 on the outer wall of sealing plug 23, and sealing plug 23 passes through screw thread outer wall 24 and the screw thread rotation sealing connection on the water injection pipe 9 inner wall, the upper end of sealed lid 10 is provided with pull ring 25, sealed lid 10 of the upper end installation of water injection pipe 9 plays the effect of sealed water injection pipe 9, sealing plug 23 of the lower extreme setting of sealed lid 10 plays the effect of blockking up water injection pipe 9.
Further, be provided with charge-in pipeline 30 on the outer wall of one side of cyclone 12, one side of charge-in pipeline 30 is provided with air-blower 14, the inlet end of air-blower 14 and the one end sealing connection of cooling conveying pipe 15, the end of giving vent to anger of air-blower 14 and charge-in pipeline 30 sealing connection, the other end of cooling conveying pipe 15 is provided with feed hopper 16, the charge-in pipeline 30 that sets up on the outer wall of one side of cyclone 12 plays the effect of pouring into zinc oxide granule into, the air-blower 14 that one side of charge-in pipeline 30 set up plays the effect of attracting zinc oxide granule, the feed hopper 16 that the other end of cooling conveying pipe 15 set up plays the effect for cooling conveying pipe 15 feeding.
Further, the upper end of the cyclone 12 is provided with a gas outlet 31, the lower end of the cyclone 12 is provided with a particle discharge port 32, the gas outlet 31 and the particle discharge port 32 are both communicated with the inside of the cyclone 12, the gas outlet 31 arranged at the upper end of the cyclone 12 plays a role in discharging dust gas, and the particle discharge port 32 arranged at the lower end of the cyclone 12 plays a role in discharging indirect-method zinc oxide particles.
Further, the inside of depositing case 11 is provided with loading board 26, and the upper end of loading board 26 is provided with holds pocket 27, and the inside that holds pocket 27 is provided with quick lime 28, and the loading board 26 of depositing the inside setting of case 11 plays the effect that bears the weight of and hold pocket 27, and quick lime 28 that the inside that holds pocket 27 set up plays the effect that reacts the heat supply with water.
The working principle is as follows: when in use, the zinc ingot 22 is put into the graphite crucible 5, then the containing mesh bag 27 is taken out from the storage box 11, the containing mesh bag 27 is put into the heating chamber 18 in the heating box 1, then the graphite crucible 5 is put into the heating box 1, the graphite crucible 5 is arranged above the edge top plate 17, the upper end of the graphite crucible 5 is aligned with the positioning groove 20 on the box edge 19 in a tight joint manner, water is injected into the water storage box 8 through the water injection pipe 9 for storage, then the sealing cover 10 is screwed up, the water in the water storage box 8 is injected into the heating chamber 18 in the heating box 1 through the water guide pipe 6 through the water pump 7, the water is violently reacted with the quicklime 28 through the containing mesh bag 27 and releases a large amount of heat, the zinc ingot 22 in the graphite crucible 5 is heated and reacted by the generated heat, the purpose of self-heating production is achieved, the zinc ingot 22 is evaporated at the temperature to form zinc steam, the steam is oxidized by oxygen in the air to generate zinc oxide, then zinc oxide particles are injected into a feed hopper 16, the zinc oxide particles enter a cyclone separator 12 through a cooling conveying pipe 15 under the action of an air blower 14, the cyclone separator 12 performs gas-solid separation on the zinc oxide particles, separated dust gas is discharged out through a gas outlet 31, indirect-method zinc oxide particles are discharged out through a particle discharge port 32, namely, a finished indirect-method zinc oxide product is prepared, and the indirect-method zinc oxide self-heating production work is completed.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (9)
1. The utility model provides an indirect method zinc oxide self-heating formula production system, includes heating cabinet (1), its characterized in that: be provided with inlet tube (2) on one side outer wall of heating cabinet (1), the inside of heating cabinet (1) is provided with graphite crucible (5), one side of heating cabinet (1) is provided with water pump (7), one side of water pump (7) is provided with water storage box (8), the opposite side of heating cabinet (1) is provided with deposits case (11), one side of depositing case (11) is provided with cyclone (12), the lower extreme of cyclone (12) is provided with installing support (29), be provided with backup pad (13) on installing support (29) one side outer wall, and backup pad (13) and installing support (29) welded connection, the upper end of backup pad (13) is provided with cooling conveying pipe (15).
2. The indirect-process zinc oxide self-heating production system according to claim 1, wherein: the lower extreme of heating cabinet (1) is provided with drain pipe (3), be provided with valve (4) on the outer wall of drain pipe (3), and valve (4) pass through flange sealing connection with drain pipe (3), the inside of heating cabinet (1) is provided with heated warehouses (18), and drain pipe (3) and inlet tube (2) all are linked together with heated warehouses (18).
3. The indirect-process zinc oxide self-heating production system according to claim 2, wherein: the top of heating chamber (18) is provided with four marginal roof (17), and four marginal roof (17) all with the inner wall welded connection of heating chamber (18), the upper end of heating cabinet (1) is provided with case edge (19), the inside of case edge (19) is provided with constant head tank (20), and constant head tank (20) and case edge (19) structure as an organic whole.
4. The indirect-process zinc oxide self-heating production system according to claim 1, wherein: the upper end of the graphite crucible (5) is provided with two pull handles (21), the pull handles (21) and the graphite crucible (5) are of an integral structure, and a plurality of zinc ingots (22) are arranged inside the graphite crucible (5).
5. The indirect-process zinc oxide self-heating production system according to claim 1, wherein: the water heater is characterized in that the water inlet end of the water pump (7) is communicated with the inside of the water storage tank (8), the water outlet end of the water pump (7) is in sealed butt joint with the water inlet pipe (2) on the outer wall of one side of the heating tank (1) through the water guide pipe (6), the upper end of the water storage tank (8) is provided with the water injection pipe (9), and the water injection pipe (9) is communicated with the inside of the water storage tank (8).
6. The indirect-process zinc oxide self-heating production system according to claim 5, wherein: seal lid (10) are installed to the upper end of water injection pipe (9), the lower extreme of seal lid (10) is provided with sealing plug (23), be provided with screw thread outer wall (24) on the outer wall of sealing plug (23), and sealing plug (23) are through screw thread rotation sealing connection on screw thread outer wall (24) and water injection pipe (9) inner wall, the upper end of seal lid (10) is provided with pull ring (25).
7. The indirect-process zinc oxide self-heating production system according to claim 1, wherein: be provided with on one side outer wall of cyclone (12) feed pipeline (30), one side of feed pipeline (30) is provided with air-blower (14), the inlet end of air-blower (14) and the one end sealing connection of cooling conveying pipe (15), the end of giving vent to anger of air-blower (14) and feed pipeline (30) sealing connection, the other end of cooling conveying pipe (15) is provided with feed hopper (16).
8. The indirect-process zinc oxide self-heating production system according to claim 1, wherein: the upper end of the cyclone separator (12) is provided with a gas outlet (31), the lower end of the cyclone separator (12) is provided with a particle discharge port (32), and the gas outlet (31) and the particle discharge port (32) are communicated with the inside of the cyclone separator (12).
9. The indirect-process zinc oxide self-heating production system according to claim 1, wherein: deposit the inside of case (11) and be provided with loading board (26), the upper end of loading board (26) is provided with holds pocket (27), the inside that holds pocket (27) is provided with quick lime (28).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010117566.8A CN111204795A (en) | 2020-02-25 | 2020-02-25 | Indirect zinc oxide self-heating production system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010117566.8A CN111204795A (en) | 2020-02-25 | 2020-02-25 | Indirect zinc oxide self-heating production system |
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| CN111204795A true CN111204795A (en) | 2020-05-29 |
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| CN202010117566.8A Pending CN111204795A (en) | 2020-02-25 | 2020-02-25 | Indirect zinc oxide self-heating production system |
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Application publication date: 20200529 |
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| RJ01 | Rejection of invention patent application after publication |