CN113578211A - A energy-saving high-efficient oxidation equipment for zinc oxide production - Google Patents
A energy-saving high-efficient oxidation equipment for zinc oxide production Download PDFInfo
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- CN113578211A CN113578211A CN202110884061.9A CN202110884061A CN113578211A CN 113578211 A CN113578211 A CN 113578211A CN 202110884061 A CN202110884061 A CN 202110884061A CN 113578211 A CN113578211 A CN 113578211A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J12/00—Chemical processes in general for reacting gaseous media with gaseous media; Apparatus specially adapted therefor
- B01J12/005—Chemical processes in general for reacting gaseous media with gaseous media; Apparatus specially adapted therefor carried out at high temperatures, e.g. by pyrolysis
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J12/00—Chemical processes in general for reacting gaseous media with gaseous media; Apparatus specially adapted therefor
- B01J12/02—Chemical processes in general for reacting gaseous media with gaseous media; Apparatus specially adapted therefor for obtaining at least one reaction product which, at normal temperature, is in the solid state
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0053—Details of the reactor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/24—Stationary reactors without moving elements inside
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- 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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/00049—Controlling or regulating processes
- B01J2219/00051—Controlling the temperature
- B01J2219/00074—Controlling the temperature by indirect heating or cooling employing heat exchange fluids
- B01J2219/00087—Controlling the temperature by indirect heating or cooling employing heat exchange fluids with heat exchange elements outside the reactor
- B01J2219/00092—Tubes
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- 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
Abstract
The invention relates to the technical field of zinc oxide production equipment, and particularly discloses energy-saving efficient oxidation equipment for zinc oxide production; the furnace comprises a furnace, an oxidation chamber, a collecting cover and a flue gas pipeline, wherein a spiral coil pipe is fixedly connected to the inner wall of the oxidation chamber, a plurality of air outlets are uniformly formed in the lower end of the coil pipe, the air outlets are inclined upwards and arranged towards the center of the oxidation chamber, the upper end of the coil pipe is connected with an air supply pipe, the air supply pipe is arranged along the central axis of the flue gas pipeline, and the end part of the air supply pipe extends out of the flue gas pipeline and is connected with a fan; the equipment disclosed by the invention can fully utilize the heat in the high-temperature flue gas, reduces the energy consumption of the existing zinc oxide kiln for heating the fed cold air, and reduces the energy consumption in the whole zinc oxide oxidation process by about 13% by combining the design of a sealing and heat-insulating structure, has the advantages of energy conservation and environmental protection, and can be widely popularized and applied in the industry.
Description
Technical Field
The invention relates to the technical field of zinc oxide production equipment, and particularly discloses energy-saving efficient oxidation equipment for zinc oxide production.
Background
In the dry process of preparing zinc oxide, zinc ore is heated to form molten liquid, the solution is evaporated to form zinc vapor, and the zinc vapor is oxidized in contact with the air, cooled and finally deposited and collected in a filter bag. At present, the oxidation equipment for zinc oxide adopts a furnace kiln, a collecting cover is arranged above the furnace kiln, an oxidation chamber is arranged between the collecting cover and the furnace kiln, and the top end of the collecting cover is connected with a flue gas pipeline. In the dry preparation process of zinc oxide, zinc ore is heated in a kiln, an air supply outlet is arranged beside an oxidation chamber, and cold air is fed into the oxidation chamber through the air supply outlet to realize the oxidation of gaseous zinc.
For example, the invention patent with the application number of 2010106004811 discloses a zinc oxide kiln which comprises an oxidation chamber arranged at the upper part of the kiln; a hearth arranged below the oxidation chamber; the combustion chamber is arranged below the hearth and communicated with the hearth; a burner disposed below the combustion chamber; a flue communicated with the hearth; a zinc melting pot arranged in the flue, an evaporating pot arranged in the hearth and a volatilization channel extending to the oxidation chamber; the zinc oxide kiln disclosed by the invention is the most widely used zinc oxide production equipment, and cold air is fed into the zinc oxide kiln through an air inlet arranged beside an oxidation chamber to oxidize gaseous zinc in the using process. However, the equipment has high energy consumption in the using process and poor oxidizing effect on gaseous zinc. On one hand, the reason for higher energy consumption is that the air supply outlet is arranged beside the kiln body, so that the sealing performance of the whole equipment is poor, and the heat in the kiln body is easily dissipated into the air; secondly, cold air is sent into the oxidation chamber through the air supply outlet, and when the cold air enters the oxidation chamber, the cold air needs to absorb heat to heat the cold air, so that certain energy consumption is consumed for heating the cold air; the oxidation effect of the gaseous zinc is not good because the fed cold air is only fed from one air feeding port in one direction, so that the cold air cannot be in full contact with the gaseous zinc in the kiln body to realize oxidation. Aiming at the defects of large energy consumption, poor oxidation effect and the like of the existing zinc oxide kiln, the invention provides energy-saving high-efficiency oxidation equipment capable of effectively solving the technical problems.
Disclosure of Invention
The invention aims to overcome the defects of high energy consumption, poor oxidation effect and the like of the conventional zinc oxide kiln, and provides energy-saving efficient oxidation equipment capable of effectively solving the technical problems.
The invention is realized by the following technical scheme:
the utility model provides an energy-saving high-efficient oxidation equipment for zinc oxide production, includes kiln, oxidizing chamber, collection cover and flue gas pipeline, the spiral helicine coil pipe of fixedly connected with on the inner wall of oxidizing chamber, a plurality of air outlets have evenly been seted up to the lower extreme of coil pipe, and the air outlet slope upwards, set up towards the center of oxidizing chamber, the upper end of coil pipe is connected with the blast pipe, the blast pipe is connected with the fan behind flue gas pipeline is stretched out to axis setting and the tip along flue gas pipeline.
In the process of producing zinc oxide, cold air sent by a fan is firstly subjected to heat exchange with high-temperature flue gas in a flue gas pipeline to preheat the air so that the air has certain heat before entering an oxidation chamber, then the air can be further heated to a higher temperature when entering a spiral coil in the oxidation chamber and then is discharged from an air outlet, and the discharged high-temperature air can be directly contacted with gaseous zinc moving upwards, so that the rapid oxidation of the gaseous zinc is realized. In addition, because the heated high-temperature air is sent out from a plurality of air outlets at the lower end of the coil, the sent hot air moves from the inner wall of the oxidation chamber to the center of the oxidation chamber, so that the upward moving gaseous zinc is fully contacted with the hot air, and the gaseous zinc is efficiently and fully oxidized.
As a further arrangement of the scheme, a hollow connecting column is fixedly arranged at the center of the interior of the collecting cover, the air supply pipe penetrates through the hollow connecting column, a plurality of first conical ring plates are connected to the hollow connecting column, a plurality of second conical ring plates are connected to the inner wall of the collecting cover, the second conical ring plates and the first conical ring plates are arranged in the collecting cover at intervals in a staggered mode, and a baffling channel is formed between the second conical ring plates and the first conical ring plates; the baffling channel formed between the conical ring plate II and the conical ring plate I can prolong the flowing time of the flue gas in the collecting hood, ensures that the high-temperature air and unoxidized gaseous zinc are fully oxidized again in the collecting hood, and effectively ensures the purity of the obtained zinc oxide.
As a further arrangement of the above scheme, the diameter of the blast pipe is one third of the inner diameter of the flue gas pipeline; the setting of its blast pipe diameter size is more important, still guarantees on the one hand that the flue gas after the reaction can follow the flue gas pipeline and gets into cooling arrangement smoothly and cool down, deposit and collect when enough air can be sent into in the control, and it is most suitable to obtain to set up the blast pipe diameter to the one third size of flue gas pipeline internal diameter through to relevant calculation.
As a further arrangement of the above scheme, the coil pipe and the blast pipe are both made of carbon steel material with excellent heat conductivity; the coil pipe and the blast pipe made of carbon steel ensure that the coil pipe and the blast pipe have high-temperature resistance while ensuring that the coil pipe and the blast pipe have excellent heat exchange effect on air, and meet the high-temperature oxidation process of zinc oxide.
As a further arrangement of the scheme, the kiln, the oxidation chamber, the collection cover and the flue gas pipeline are sequentially and hermetically connected from bottom to top, and the outer walls of the oxidation chamber and the collection cover are made of heat insulation materials; with kiln, oxidizing chamber, collection cover and flue gas pipeline sealing connection can effectively prevent inside thermal diffusion, the outer wall of oxidizing chamber, collection cover is made by thermal-insulated insulation material simultaneously and can further guarantee the heat preservation effect of its whole equipment, prevents that the heat from giving off, reduces the energy consumption of whole equipment.
As a further arrangement of the scheme, a plurality of evaporating pots are arranged in the kiln, and the openings at the upper ends of the evaporating pots are communicated with the oxidation chamber; the kiln is arranged conventionally, and gaseous zinc at the evaporation position in each evaporation pan can enter the oxidation chamber.
As a further arrangement of the above scheme, the flue gas pipeline is formed by connecting a vertical section and a horizontal section, the lower end of the vertical section is connected with the collecting cover, one end of the horizontal section is connected with the upper end of the vertical section, and the other end of the horizontal section is connected with the negative pressure system.
Has the advantages that:
1) compared with the existing zinc oxide kiln, the energy-saving efficient oxidation equipment disclosed by the invention has the advantages that the whole equipment is sealed and insulated, and the heat in the equipment is not easy to dissipate in the oxidation process of zinc oxide; meanwhile, the air is sent into the oxidation chamber along a flue gas pipeline through the blast pipe in the air sending process, the sent cold air can exchange heat with high-temperature flue gas in the flue gas pipeline to preheat and then is heated in the coil pipe, the heated high-temperature air is directly contacted with gaseous zinc to be oxidized after being discharged from the air outlet, therefore, the design of the whole air sending system can fully utilize the heat in the high-temperature flue gas, the energy consumption of the existing zinc oxide kiln for heating the sent cold air is reduced, the design of the sealing and heat insulation structure is combined to reduce the energy consumption in the whole zinc oxide oxidation process by about 13%, and the system has the advantages of energy conservation and environmental protection, and can be widely popularized and applied in the industry.
2) The air sent into the energy-saving high-efficiency oxidation equipment disclosed by the invention is conveyed from the periphery to the center of the oxidation chamber, and the high-temperature air is contacted with gaseous zinc in the conveying process to be fully oxidized; the baffling structure that sets up simultaneously in collecting the cover can prolong the time of flue gas in collecting the cover to make in the flue gas not have sufficient reaction time by complete oxidation's gaseous state zinc and high temperature air and oxidize, greatly improved oxidation effect and the efficiency of zinc oxide preparation in-process, its structural design who collects the cover is simple, but its oxidation process to zinc oxide has brought apparent technological effect, make the result of use of whole equipment excellent, the practicality is stronger.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic view of the internal plan structure of the oxidation chamber, collection hood, flue gas duct of the present invention;
FIG. 3 is a schematic perspective profile of the kiln of the present invention;
FIG. 4 is a schematic perspective view of the air supply pipe and coil pipe of the present invention;
fig. 5 is a schematic perspective sectional view of a collecting cover in embodiment 2 of the present invention.
Wherein:
1-furnace, 101-evaporation crucible, 102-charging opening, 2-oxidation chamber, 3-collection cover, 301-hollow connecting column, 302-connecting rod, 4-flue gas pipeline, 401-vertical section, 402-horizontal section, 5-blast pipe, 6-coil pipe, 601-air outlet, 7-baffle component, 701-first conical ring plate and 702-second conical ring plate.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In this application, the terms "upper", "lower", "left", "right", "front", "rear", "top", and,
The terms "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like, refer to an orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are used primarily to better describe the invention and its embodiments and are not intended to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.
Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meanings of these terms in the present invention can be understood by those skilled in the art as appropriate.
Furthermore, the terms "mounted," "disposed," "provided," "connected," and "sleeved" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meanings of the above terms in the present invention can be understood by those of ordinary skill in the art according to specific situations.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail with reference to the accompanying drawings 1 to 5, in conjunction with the embodiments.
Example 1
The oxidation chamber 2 is arranged at the upper end of the kiln 1, the upper end opening of the evaporation crucible 101 is communicated with the inner cavity of the oxidation chamber 2, and the zinc raw material in the evaporation crucible 101 can enter the oxidation chamber 2 from the upper end opening when being evaporated into gaseous zinc. The shape of the oxidation chamber 2 can be cylindrical or rectangular, and the outer wall of the whole oxidation chamber 2 is made of heat insulating material.
The collecting hood 3 is connected to the upper end of the oxidation chamber 2, wherein the collecting hood 3 is adapted to the shape of the oxidation chamber 2 and can be provided in the shape of a cone or a pyramid. At the same time, the flue gas duct 4 is connected to the top end of the collecting hood 3, while the outer end of the flue gas duct 4 is connected to a negative pressure system (not shown in the figure). Through the sealing connection among the bottom kiln 1, the oxidation chamber 2 and the collecting cover 3, the whole oxidation equipment can be in a sealed heat preservation state, and the heat dissipation in the oxidation equipment can be effectively prevented. Wherein the outer wall of collecting cover 3 is also made by thermal-insulated insulation material, and flue gas pipeline 4 is connected by vertical section 401 and horizontal segment 402 and constitutes, and wherein vertical section 401 is connected with the top of collecting cover 3, and the one end and the vertical section 401 upper end of horizontal segment 402 are connected, and the other end is connected with negative pressure system.
This embodiment 1 and current zinc oxide kiln improve the position in the setting of air feeding system the most, this implementation sets up the sealed of oxidizing chamber, be provided with a blast pipe 5 that sets up along flue gas duct 4 self axis simultaneously in flue gas duct 4, flue gas duct 4 is stretched out to the one end of blast pipe 5 and is connected with fan (not drawn in the figure), the other end stretches into among the oxidizing chamber 2, and the diameter of blast pipe 5 is about 1/3 of 4 internal diameters of flue gas duct when specifically setting up, guarantee that flue gases such as zinc oxide after the oxidation can smoothly circulate in flue gas duct 4. The lower end of the blast pipe 5 extending into the oxidation chamber 2 is connected with a spiral coil 6, the blast pipe 5 and the coil 6 in the embodiment are made of carbon steel material with excellent heat conductivity, and the spiral coil 6 can be welded and fixed with the inner wall of the oxidation chamber 2. Finally, a plurality of air outlets 601 are formed in the lower end of the spiral coil 6 in an annular array, and the air outlets 601 are inclined upwards and arranged towards the center of the oxidation chamber 2 when being specifically arranged.
In the present embodiment, the air feeding system is configured to feed the external air into the air supply pipe 5 through the fan, and when the air enters the oxidation chamber 2 along the air supply pipe 5 and the coil 6, the cold air is preheated by heat exchange with the high temperature flue gas in the flue gas duct 3 through the air supply pipe 5 made of carbon steel, then is further heated in the coil 6, and finally is discharged from the air outlet 601 to contact with the gaseous zinc moving upward to be oxidized. Whole oxidation equipment sets up through its self sealedly to and simultaneously to the utilization that the flue gas preheated, effectively reduced whole zinc oxide oxidation equipment's energy consumption, because the hot-air that sends out is seen off all around from oxidation chamber 2, thereby can carry out abundant contact oxidation with the gaseous state zinc of upward movement, effectively guaranteed the oxidation effect in the zinc oxide production process.
Example 2
Referring to fig. 5, this embodiment 2 still sets up a vertical cavity spliced pole 301 at the positive center of collecting cover 3 to evenly weld between the lower extreme inner wall of collecting cover 3 and cavity spliced pole 301 has many connecting rods 302, and many connecting rods 302 can set up cavity spliced pole 301 stably in the inner chamber of collecting cover 3, run through cavity spliced pole 301 setting when blast pipe 5 extends into to collect cover 3 simultaneously.
A baffle assembly 7 is arranged between the inner wall of the collecting cover 3 and the hollow connecting column 301, wherein the baffle assembly 7 comprises a plurality of first conical ring plates 701 connected with the hollow connecting column 301 and a plurality of second conical ring plates 702 connected with the inner wall of the collecting cover 3, and the first conical ring plates 701 and the second conical ring plates 702 are arranged at intervals and in a staggered mode, so that a plurality of baffle channels are formed in the collecting cover 3. When the flue gas (the flue gas contains gaseous zinc, hot air, gaseous zinc oxide and other components) moves along the baffling channel in the collecting hood 3, the time of the flue gas in the collecting hood 3 can be prolonged, so that the gaseous zinc and the hot air in the flue gas can have longer oxidation reaction time, the gaseous zinc in the flue gas can be fully oxidized to obtain the zinc oxide, and the oxidation effect of the zinc oxide is greatly improved.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The utility model provides an energy-saving high-efficient oxidation equipment for zinc oxide production, includes kiln (1), oxidation chamber (2), collects cover (3) and flue gas pipeline (4), its characterized in that, fixedly connected with spiral helicine coil pipe (6) on the inner wall of oxidation chamber (2), a plurality of air outlets (601) have evenly been seted up to the lower extreme of coil pipe (6), and air outlet (601) slope upwards, towards the center setting of oxidation chamber (2), the upper end of coil pipe (6) is connected with blast pipe (5), blast pipe (5) are connected with the fan after flue gas pipeline (6) is stretched out along the axis setting and the tip of flue gas pipeline (4).
2. The energy-saving high-efficiency oxidation equipment for producing the zinc oxide according to the claim 1, characterized in that the hollow connecting column (301) is fixedly arranged at the center of the inner part of the collecting cover (3), the blast pipe (5) is arranged through the hollow connecting column (301), the hollow connecting column (301) is connected with a plurality of first conical ring plates (701), the inner wall of the collecting cover (3) is connected with a plurality of second conical ring plates (702), the second conical ring plates (702) and the first conical ring plates (701) are arranged in the collecting cover at intervals and in a staggered mode, and a baffling channel is formed between the second conical ring plates (702) and the first conical ring plates (701).
3. The energy-saving high-efficiency oxidation equipment for producing zinc oxide according to claim 1 or 2, characterized in that the diameter of the blast pipe (5) is one third of the inner diameter of the flue gas duct (4).
4. The energy-saving high-efficiency oxidation equipment for production of zinc oxide according to claim 3, characterized in that the coil pipe (6) and the blast pipe (5) are made of carbon steel material with excellent heat conductivity.
5. The energy-saving efficient oxidation equipment for zinc oxide production according to claim 1, wherein the kiln (1), the oxidation chamber (2), the collection cover (3) and the flue gas pipeline (4) are sequentially and hermetically connected from bottom to top, and the outer walls of the oxidation chamber (2) and the collection cover (3) are made of heat insulation materials.
6. The energy-saving high-efficiency oxidation equipment for zinc oxide production according to claim 5, characterized in that a plurality of evaporating pots (101) are provided in the kiln (1), and the upper end openings of the plurality of evaporating pots (101) are communicated with the oxidation chamber (2).
7. The energy-saving high-efficiency oxidation equipment for producing zinc oxide according to claim 1, characterized in that the flue gas pipeline (4) is composed of a vertical section (401) and a horizontal section (402) which are connected, the lower end of the vertical section (401) is connected with the collecting hood (3), one end of the horizontal section (402) is connected with the upper end of the vertical section (401), and the other end is connected with the negative pressure system.
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| CN202110884061.9A CN113578211B (en) | 2021-08-03 | 2021-08-03 | Energy-saving efficient oxidation equipment for zinc oxide production |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114044536A (en) * | 2021-12-09 | 2022-02-15 | 安徽骏马新材料科技股份有限公司 | Environment-friendly red lead preparation process |
| CN114177856A (en) * | 2021-12-09 | 2022-03-15 | 安徽骏马新材料科技股份有限公司 | Red lead production facility of environmental protection |
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| CN212457858U (en) * | 2020-05-14 | 2021-02-02 | 张家港凯铭锌业有限公司 | Heating device for zinc oxide kiln |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114044536A (en) * | 2021-12-09 | 2022-02-15 | 安徽骏马新材料科技股份有限公司 | Environment-friendly red lead preparation process |
| CN114177856A (en) * | 2021-12-09 | 2022-03-15 | 安徽骏马新材料科技股份有限公司 | Red lead production facility of environmental protection |
| CN114044536B (en) * | 2021-12-09 | 2023-09-01 | 安徽骏马新材料科技股份有限公司 | Environment-friendly red lead preparation process |
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