CN117797935A - Dry grinding device for limestone - Google Patents

Dry grinding device for limestone Download PDF

Info

Publication number
CN117797935A
CN117797935A CN202410064551.8A CN202410064551A CN117797935A CN 117797935 A CN117797935 A CN 117797935A CN 202410064551 A CN202410064551 A CN 202410064551A CN 117797935 A CN117797935 A CN 117797935A
Authority
CN
China
Prior art keywords
bin
limestone
air
vertical mill
dry grinding
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
Application number
CN202410064551.8A
Other languages
Chinese (zh)
Inventor
刘斌
王宇
董浩
王国栋
程剑
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huarun Electric Power Tangshan Caofeidian Co ltd
Original Assignee
Huarun Electric Power Tangshan Caofeidian Co ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Huarun Electric Power Tangshan Caofeidian Co ltd filed Critical Huarun Electric Power Tangshan Caofeidian Co ltd
Priority to CN202410064551.8A priority Critical patent/CN117797935A/en
Publication of CN117797935A publication Critical patent/CN117797935A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C21/00—Disintegrating plant with or without drying of the material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/02—Feeding devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/18—Adding fluid, other than for crushing or disintegrating by fluid energy
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C1/00—Magnetic separation
    • B03C1/02—Magnetic separation acting directly on the substance being separated
    • B03C1/16—Magnetic separation acting directly on the substance being separated with material carriers in the form of belts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C9/00—Combinations with other devices, e.g. fans, expansion chambers, diffusors, water locks
    • 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
    • Y02P40/00—Technologies relating to the processing of minerals
    • Y02P40/40—Production or processing of lime, e.g. limestone regeneration of lime in pulp and sugar mills

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Disintegrating Or Milling (AREA)

Abstract

The invention discloses a limestone dry grinding device which comprises a raw material bin, a vertical mill, a buffering bin, a dust remover, a cyclone separator and a finished product bin, wherein a discharge hole of the raw material bin is connected with a feeding hopper lifting machine, a first conveyor is arranged between a feed hole of the buffering bin and the feeding hopper lifting machine, a belt conveyor is arranged between the discharge hole of the buffering bin and the feed hole of the vertical mill, an air outlet of the vertical mill is connected to the cyclone separator, an air inlet of the vertical mill is provided with a residual air pipe, the residual air pipe is connected with a blower, an air inlet of the blower is connected to an air outlet of the dust remover, the residual air pipe is connected with an air inlet of the dust remover, a second conveyor is arranged below the discharge hole of the cyclone separator and the discharge hole of the dust remover, and the second conveyor is connected to the finished product bin. The invention can be used for preparing limestone powder in real time for a flue gas desulfurization system of a power plant, and solves the problems of storage cost, unchanged transportation and rising purchase cost in the prior direct purchase limestone powder supply desulfurization.

Description

Dry grinding device for limestone
Technical Field
The invention relates to the technical field of limestone grinding equipment, in particular to a limestone dry grinding device.
Background
At present, wet desulfurization is a domestic mainstream desulfurization technology, and other desulfurization modes such as carbide slag, salt mud, seawater and the like can replace limestone wet desulfurization to a certain extent, but due to the reasons of raw material sources, transportation, environmental protection and the like, wet desulfurization still occupies about 90% of market share, limestone is used as raw materials for desulfurization production, limestone powder is added with water and stirred to prepare slurry, the slurry is supplied to a desulfurization system, the limestone powder is thinner and needs powder storage, the storage cost is generally designed to be 3 days, the storage time is short, road transportation is difficult to ensure, and the limestone powder purchasing cost is high in recent years.
The limestone has small influence on the environment, the limestone can be piled up in an open-air field, the storage time is generally more than 5 days, the limestone is better in desulfurization emergency when applied to a power plant, a supply unit can be prepared in time for flue gas desulfurization, and therefore, a limestone pulverizing device is necessary to design.
Disclosure of Invention
In order to overcome the above-mentioned disadvantages of the prior art, an object of the present invention is to provide a limestone dry grinding apparatus.
The technical scheme adopted for solving the technical problems is as follows: the utility model provides a limestone dry-type grinding device, includes former feed bin, vertical mill, buffering storehouse, dust remover, cyclone and finished product storehouse, the discharge gate of former feed bin is connected with the hopper elevator, be equipped with first conveyer between the feed inlet of buffering storehouse and the hopper elevator, be equipped with the belt feeder between the discharge gate of buffering storehouse and the feed inlet of vertical mill, vertical mill's air outlet is connected to cyclone, vertical mill's air intake goes out and is equipped with surplus tuber pipe, surplus tuber pipe is connected with the air-blower, the air intake of air-blower is connected to the air outlet of dust remover, surplus tuber pipe is connected with the air intake of dust remover, cyclone's discharge gate and dust remover's discharge gate below are equipped with the second conveyer, the second conveyer is connected to the finished product storehouse.
As a further improvement of the invention: the top of the cyclone separator is provided with a return air pipe, and the return air pipe is connected with an air inlet of the blower.
As a further improvement of the invention: and the first conveyor and the belt conveyor are provided with iron removers.
As a further improvement of the invention: still be equipped with the discharge bin, the discharge gate of discharge bin is provided with vibrating feeder, vibrating feeder's discharge gate is provided with the lifting machine of unloading, the discharge gate of lifting machine of unloading is connected to the feed inlet of former feed bin.
As a further improvement of the invention: the first valve is arranged on the connecting pipeline of the dust remover and the blower, and the second valve is arranged on the connecting pipeline of the dust remover and the residual air pipe.
As a further improvement of the invention: the output force of the vertical mill is 20t/h.
As a further improvement of the invention: the side of finished product storehouse is equipped with the opening, and the opening part welding has the chute, the chute is connected to finished product powder storehouse through pipeline, and the exit of the finished product powder storehouse of locating installs electronic ejection of compact valve, pipeline connection has the air compressor machine.
As a further improvement of the invention: the air compressor adopts the exhaust air with the air displacement of 60Nm 3 And/min, and the exhaust pressure is 0.8 MPa.
As a further improvement of the invention: and a bulk machine is arranged at the bottom of the finished product bin.
Compared with the prior art, the invention has the beneficial effects that:
the invention adopts the vertical mill to grind the limestone raw materials conveyed by the buffer bin into the limestone raw materials with fineness capable of meeting SO by arranging the raw materials bin, the vertical mill, the buffer bin, the dust remover, the cyclone separator and the finished product bin 2 The limestone powder required by the absorption system is discharged to a second conveying device by adopting a dust remover and a cyclone separatorOn the conveyor, the limestone powder is temporarily stored and supplied to a desulfurization unit for use in a finished product bin, the problems that the storage cost, the transportation invariance and the purchase cost rise in the prior direct purchase limestone powder supply desulfurization use are solved, and the condition that the unit cannot realize flue gas desulfurization due to the fact that the limestone powder is supplied by the unit intermittently, and the unit cannot reach the standard and is forced to stop is avoided.
Drawings
FIG. 1 is a schematic diagram of a dry grinding apparatus for limestone.
Reference numerals:
10. the device comprises a discharging bin 11, a vibrating feeder 12, a discharging hoister 13 and a first auxiliary conveyor;
20. raw material bin 21, feeding bucket elevator 22, first conveyor 23, iron remover 24, buffer bin 25, belt conveyor 26, vertical mill 261, residual air pipe 27, cyclone separator 271, return air pipe 28, blower 281, first valve 282, second valve 29, dust remover;
30. the second conveyor, 31, finished product storehouse, 32, unloading lifting machine, 33, chute, 34, finished product powder storehouse, 35, bleeder valve.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to specific embodiments of the present invention and corresponding drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. 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.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; may be a mechanical connection; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.
In order to solve the technical problems in the prior art, the present invention will be further described with reference to the accompanying drawings and examples:
as shown in fig. 1, the invention discloses a limestone dry grinding device, which comprises a discharging bin 10, a dust remover 29, a raw bin 20, a powder making workshop and a finished product bin 31, wherein limestone grinding equipment is arranged in the powder making workshop, the limestone grinding equipment comprises a buffer bin 24, a vertical mill 26, the dust remover 29, a cyclone separator 27 and a blower 28, a discharge port of the raw bin 20 is connected with a hopper elevator 21, a first conveyor 22 is arranged between a feed port of the buffer bin 24 and the hopper elevator 21, a belt conveyor 25 is arranged between the discharge port of the buffer bin 24 and the feed port of the vertical mill 26, further, an air outlet of the vertical mill 26 is connected with the cyclone separator 27, a second conveyor 30 is arranged below the discharge port of the cyclone separator 27, an air inlet of the vertical mill 26 is provided with a waste air pipe 261, the waste air pipe 261 is connected to an air outlet of the blower 28, an air outlet of the cyclone separator 27 is connected to an air inlet of the blower 28, a circulating air flow is sucked into the top of the cyclone separator 27 through a pipe 271, and the waste air inlet of the cyclone separator 29 is connected to the air inlet of the blower 28.
Further, a first valve 281 is arranged on a connecting pipeline between the dust remover 29 and the blower 28, and a second valve 282 is arranged on a connecting pipeline between the dust remover 29 and the residual air pipe 261.
Further, a discharging mechanism is arranged between the discharging bin 10 and the raw material bin 20, the discharging mechanism comprises a vibrating feeder 11 and a discharging lifting machine 12, specifically, a discharging hole of the discharging bin 10 is provided with the vibrating feeder 11, a discharging hole of the vibrating feeder 11 is provided with the discharging lifting machine 12, and a discharging hole of the discharging lifting machine 12 is connected to a feeding hole of the raw material bin 20.
Further, a first auxiliary conveyor 13 is installed between the discharge port of the unloading elevator 12 and the discharge port of the raw material bin 20, and limestone raw materials conveyed by the unloading elevator 12 are respectively transported to different raw material bins 20 for storage.
The discharging bin 10 is arranged at the bottom layer, the raw material bin 20 is arranged at the upper layer, the limestone raw material is conveyed into the raw material bin 20 at the high position through the discharging lifting machine 12, the powder making workshop is a space for grinding the limestone raw material, the finished product collected by the cyclone separator 27 and the finished product collected by the pulse dust collector 29 are conveyed through the second conveyor 30 at the lower part, and after entering the discharging lifting machine 32, the finished product enters the finished product bin 31 again through the scraper conveyor at the top of the bin.
The limestone raw material is transported into a factory by a self-unloading truck, is unloaded to a discharging bin 10, and is conveyed to an effective volume of 2 multiplied by 1500m by a vibrating feeder 11 and a plate chain type lifting machine 3 Limestone raw material bin 20 of (c). Limestone pulverizer with back diameter of 3 sets and output of 20t/h and matched grinding, wherein qualified limestone powder enters an effective volume of 2X 500m 3 Limestone powder bin. The bottom of the finished limestone powder bin 31 is provided with a bulk loader for loading and unloading the limestone powder by a powder tank truck, and simultaneously, the limestone powder is respectively conveyed to the existing limestone powder bins of the first stage and the second stage in a time-sharing mode. The limestone powder conveying air source is provided by compressed air, and 3 screw air compressors with the exhaust air quantity of 60Nm3/min are newly added in the original air compressor room.
In some embodiments, the first conveyor 22 and the belt line are provided with an iron remover 23, and the iron remover 23 is used to remove impurity iron in the limestone raw material.
The discharging elevator 12 and the feeding elevator adopt plate chain type elevators or bucket elevators, the dust remover 29 is a pulse dust remover 29, and the first conveyor 22 and the second conveyor 30 adopt scraper conveyors.
Raw materials in the buffer bin are conveyed in from the raw material bin 20 through a feeding elevator and then are uniformly fed into the vertical mill through the belt conveyor 25, so that the phenomenon that the raw material bin 20 is directly fed into the vertical mill 26 and the feeding is not timely or the raw material bin 20 interrupts the raw material supply, and the normal operation of the vertical mill 26 is influenced is avoided. The materials are ground in a main grinding chamber, the vertical grinding machine 26 is provided with an analyzer, the fineness of the materials at the outlet of the grinding machine can meet the requirement of an SO2 absorption system, and the particle size is at least less than or equal to 44 mu m (325 meshes of 90 percent of sieving rate). Limestone raw materials are ground in a grinding chamber of the vertical mill 26, ground limestone powder is taken away by air flow of a fan, classified by an analyzer, limestone powder conforming to fineness enters a cyclone separator 27 along with the air flow through the air flow, separated and collected, and the collected limestone powder is conveyed to a finished product bin 31 through a second conveyor 30.
The circulating air flow is sucked into the blower 28 through the return air pipe 271 at the top of the cyclone collector. The whole air flow system is in closed circulation and circularly flows in positive and negative pressure states. A residual air pipe 261 between the blower 28 and the main machine, which adjusts the balance of air flow generated by grinding temperature rise and pipeline air leakage, and introduces the residual air into the pulse dust collector 29; the pulse dust collector 29 collects the fine powder carried by the residual air, the collected fine powder enters the scraper conveyor below and then enters the plate chain type elevator through the collecting scraper machine, and the residual air is purified and then discharged.
Further, an opening is provided on the side of the product bin 31, a chute 33 is welded at the opening, the product is introduced into a product powder bin 34, and an electric discharge valve 35 is installed at the outlet of the bin pump and is connected with a conveying pipeline. Further, the conveying pipeline is connected with the screw air compressor, and limestone powder in the finished product bin 31 is conveyed into the finished product powder bin 34 through the air compressor.
In practice, three vertical mills 26 are operated simultaneously, the maximum transport of limestone powder is designed according to 60t/h, and the compressed air consumption is calculated to be about 150Nm3/min. In consideration of the uniformity of the whole plant equipment, 3 screw air compressors with the exhaust capacity of 60Nm3/min and the exhaust pressure of 0.8MPa are added. Three dry mills are added, the motor power is 685kW, and the voltage level is 6kV; three screw air compressors with motor power of 350kW and voltage class of 10kV. The limestone dry grinding device adopts a DCS remote control mode. The newly added 2-sided DCS remote I/O cabinet communicates with the chemical DCS inlet wire. The system is added with about 400 points of IO measuring points, a remote cabinet of the dry mill is provided with 1 pair of DPUs, and two I/O cabinets are placed between the first-stage coal conveying electronic room and connected with a water-converting DCS system through a network. The control signals and the measuring points of the newly added three air compressors are introduced into the secondary DCS system, and all thermal control signals of the newly added equipment utilize the existing I/O standby channels and clamping pieces of the DCS.
The limestone dry grinding device can be used for preparing limestone powder in real time for supplying a desulfurization system, realizes zero outsourcing of limestone powder, effectively reduces purchasing cost, solves the problems of storage cost, unchanged transportation and rising purchasing cost in the prior direct purchasing limestone powder supplying desulfurization, avoids the condition that the limestone powder supplied by a machine set is not subjected to flue gas desulfurization, and cannot reach the standard to be discharged and forced to stop, and ensures normal production.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. 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.
The foregoing is only a specific embodiment of the invention to enable those skilled in the art to understand or practice the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (9)

1. The utility model provides a limestone dry-type grinding device, its characterized in that includes former feed bin, vertical mill, buffering storehouse, dust remover, cyclone and finished product storehouse, the discharge gate of former feed bin is connected with the hopper elevator, be equipped with first conveyer between the feed inlet of buffering storehouse and the hopper elevator, be equipped with the belt feeder between the discharge gate of buffering storehouse and the feed inlet of vertical mill, vertical mill's air outlet is connected to cyclone, vertical mill's air intake goes out and is equipped with surplus tuber pipe, surplus tuber pipe is connected with the air-blower, the air intake of air-blower is connected to the air outlet of dust remover, surplus tuber pipe is connected with the air intake of dust remover, cyclone's discharge gate and dust remover's discharge gate below is equipped with the second conveyer, the second conveyer is connected to the finished product storehouse.
2. A limestone dry grinding apparatus according to claim 1 wherein the top of the cyclone is provided with a return duct connected to the air inlet of the blower.
3. A limestone dry grinding apparatus according to claim 1 wherein de-ironing devices are provided on the first conveyor and belt conveyor.
4. The limestone dry grinding device according to claim 1, further comprising a discharge bin, wherein a discharge port of the discharge bin is provided with a vibratory feeder, a discharge port of the vibratory feeder is provided with a discharge elevator, and a discharge port of the discharge elevator is connected to a feed port of the raw bin.
5. The limestone dry grinding apparatus of claim 1 wherein the first valve is provided on the duct connecting the dust collector to the blower and the second valve is provided on the duct connecting the dust collector to the waste air duct.
6. A limestone dry grinding apparatus according to claim 1 wherein the vertical mill has an output of 20t/h.
7. The limestone dry grinding device according to claim 1, wherein an opening is formed in the side face of the finished product bin, a chute is welded at the opening, the chute is connected to the finished product bin through a conveying pipeline, an electric discharge valve is installed at the outlet of the finished product bin, and the conveying pipeline is connected with an air compressor.
8. A limestone dry grinding apparatus according to claim 7 wherein the air compressor uses an exhaust air flow of 60Nm 3 And/min, and the exhaust pressure is 0.8 MPa.
9. A limestone dry grinding apparatus according to claim 1 wherein a bulk machine is mounted to the bottom of the finished bin.
CN202410064551.8A 2024-01-17 2024-01-17 Dry grinding device for limestone Pending CN117797935A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202410064551.8A CN117797935A (en) 2024-01-17 2024-01-17 Dry grinding device for limestone

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202410064551.8A CN117797935A (en) 2024-01-17 2024-01-17 Dry grinding device for limestone

Publications (1)

Publication Number Publication Date
CN117797935A true CN117797935A (en) 2024-04-02

Family

ID=90434662

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202410064551.8A Pending CN117797935A (en) 2024-01-17 2024-01-17 Dry grinding device for limestone

Country Status (1)

Country Link
CN (1) CN117797935A (en)

Similar Documents

Publication Publication Date Title
CN102531418A (en) Steel slag grinding production technology and system
CN203460319U (en) Dust removing system for main building of concrete mixing station
CN103949322A (en) Nickel slag grinding system and production process thereof
CN215313946U (en) Pneumatic conveying system for dedusting ash in ore tank mixed with large-particle-size particles
CN109985709A (en) A kind of high-efficiency pulverized coal preparation system
CN203874873U (en) Nickel slag grinding system
CN206985167U (en) A kind of mixing air-transport system for rice husk removal of impurities
CN104689897B (en) Automatic grinding system and method for cokes
CN211168930U (en) Pneumatic conveying device
CN112317515A (en) Dust removal recovery device and dust removal recovery method for spray tower
CN117797935A (en) Dry grinding device for limestone
CN207546651U (en) A kind of movable type cement grinding plant
CN215947129U (en) Environment-friendly raw material automatic preparation system for cement production
CN115254363A (en) Pulverized coal balanced calling system and method thereof
CN201279508Y (en) Pebble coal vacuum clearing and sorting system
CN210159764U (en) Coarse grain wet type pre-magnetic separation and closed circuit ore grinding grading system in HPGR flow
CN210568443U (en) Pretreatment system before burning of TDI coke
CN210504514U (en) Fuel storage and conveying system for biomass direct combustion
CN106517203A (en) Calcium carbide production system
CN201483610U (en) Polishing powder adding winnowing device
KR101002404B1 (en) A coal pulverization and distribution transfer device
CN112619886A (en) Dust removal recycling system
CN219689808U (en) Purification ash recycling device with ball pressing device
CN209109351U (en) A kind of raw mill circulation dreg removing system
CN221253163U (en) Alloy smelting mixture conveying, filtering and dust collecting device

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination