CN108502547A - A kind of water-free magnesium chloride granule pneumatic conveying method - Google Patents

A kind of water-free magnesium chloride granule pneumatic conveying method Download PDF

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Publication number
CN108502547A
CN108502547A CN201810293189.6A CN201810293189A CN108502547A CN 108502547 A CN108502547 A CN 108502547A CN 201810293189 A CN201810293189 A CN 201810293189A CN 108502547 A CN108502547 A CN 108502547A
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CN
China
Prior art keywords
magnesium chloride
water
anhydrous magnesium
pneumatic conveying
conveying
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
CN201810293189.6A
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Chinese (zh)
Inventor
党国元
朱红卫
侯军
张力
李成贤
赵娟娟
戴杰
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Qinghai Salt Lake Industry Co Ltd
Original Assignee
Qinghai Salt Lake Industry 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 Qinghai Salt Lake Industry Co Ltd filed Critical Qinghai Salt Lake Industry Co Ltd
Priority to CN201810293189.6A priority Critical patent/CN108502547A/en
Publication of CN108502547A publication Critical patent/CN108502547A/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65GTRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G53/00Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
    • B65G53/04Conveying materials in bulk pneumatically through pipes or tubes; Air slides
    • B65G53/16Gas pressure systems operating with fluidisation of the materials
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65GTRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G53/00Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
    • B65G53/34Details
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65GTRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G53/00Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
    • B65G53/34Details
    • B65G53/36Arrangements of containers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65GTRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G53/00Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
    • B65G53/34Details
    • B65G53/66Use of indicator or control devices, e.g. for controlling gas pressure, for controlling proportions of material and gas, for indicating or preventing jamming of material

Abstract

The present invention relates to a kind of water-free magnesium chloride granule pneumatic conveying methods.Anhydrous magnesium chloride is prepared using bischofite as raw material, anhydrous magnesium chloride is delivered to by electrolysis zone anhydrous magnesium chloride Storage Silo, the raw material as electrolytic metal magnesium by air-transport system.It mainly includes the following steps that:Screening, charging, conveying, material issuing, Pneumatic conveying pipeline block clearing.The carrying method is simple, production efficiency is high, conveying capacity is big, fed distance is long, conveying speed is higher;It can feed at one, it is then small in many places discharging, flexible arrangement, simple in equipment, use, management and easy to maintain, high degree of automation, environmental pollution, it is easy to accomplish industrialized production.

Description

A kind of water-free magnesium chloride granule pneumatic conveying method
Technical field
The present invention relates to a kind of pneumatic conveying methods, in particular relate to anhydrous magnesium chloride with high purity pneumatic conveying method.
Background technology
Qinghai Chaerhan salt lakes are the chloride type potassium sodium magnesium salts mineral deposits of Largest In China, have large storage capacity, grade height, type Entirely, it is distributed Relatively centralized, the features such as combination of resources is good, wherein sodium, potassium, magnesium reserves are respectively 460,1.45 and 16.7 hundred million tons, and There is the national strategies resource such as abundant lithium, rubidium, caesium, is the salt lake of domestic most Development volue, estimates the potential economy of reserves It is worth up to more than 16 trillion yuans.
The Qinghai Salt Lake limited liability company for being located in Cha Er Han Salt Lake is completed 3,000,000 tons/year of potassium chloride device, accounts for the whole nation The 90% of total output;With the utilization of potassium resource, the old halogen of waste liquid (magnesium chloride containing 33%) largely discharges, and discharge capacity is high now Up to 64,000,000 m3, these old halogen are that the wasting of resources also results in environmental pollution if not being used, thus using old halogen as raw material into The exploitation of row electrolytic magnesium production technology is too impatient to wait.
Superiority and uniqueness of the magnesium metal due to its physical property, it has also become the extremely wide metal of current application foreground Material, alloy product are widely used in the fields such as automobile, Aeronautics and Astronautics, electronics, are described as by material scholar " when substituting metal ", Currently, the production technology of magnesium metal is mainly using magnesite, carnallite and dolomite as the fused salt electrolysis process of raw material and thermal reduction Method, this production technology have that comprehensive energy consumption is higher, environmental pollution is serious, labor intensity is big, high-nickel material consumption is big etc. and lack Point.
CN107585577A discloses a kind of particle transport system of fast energy-saving economy, including central processing unit, master are matched Material transport system, backwind tube deashing and pulse dust removal system and emergency use are matched
Expect transport system, the central processing unit and the main two-way electric connection of dispensing transport system, central processing unit with return Air hose deashing and pulse dust removal system bidirectional are electrically connected, central processing unit with emergency use dispensing transport system is two-way electrically connects It connects, main dispensing transport system includes sodium chloride warehouse, carbon dust warehouse, magnesium chloride warehouse, carbon dust material claims, mixture material claims, chlorination Magnesium transfer pot and the first intermediation storehouse.It ensures that anhydrous magnesium chloride is conveyed in dry pipeline liquid injecting device, prevents from absorbing water Point, influence magnesium eletrolysis production;Plenty of time and cost are saved by tank car transport than before;Can to doses in electrolytic cell into Row accurately controls;High degree of automation;Loss during material transportation is small, and environmental pollution is small.
CN101279753A discloses a kind of preparation method and equipment of anhydrous magnesium chloride, more than magnesium chloride fusing point Temperature so that magnesium chloride is melted, so that Magnesium Chloride Melt is sprayed and with drying compressed air by magnesium chloride melt liquid with inert gas Atomization, condensation obtain anhydrous magnesium chloride.Equipment includes melting furnace, crucible, melt conveying pipeline, nozzle, air compressor machine, collection Storehouse;Method includes the following steps:Enter stove, magnesium chloride fusing, magnesium chloride conveyance conduit and nozzle are carried out high-frequency heating, atomization, It collects and packs.It uses dry high pressure air to reach atomizing effect, work to molten magnesium chloride liquid beam intense impact Skill is simple and convenient to operate, and can obtain relatively pure anhydrous magnesium chloride;Atomised product is in spherical, even particle size distribution.
The electrolytic magnesium technology of magnesium metal factory of Qinghai Salt Lake Mei Ye companies is that MgCl is directly extracted from salt lake bittern2Use electricity Solution produces magnesium metal, and the core of this technique is the preparation and its conveying of anhydrous magnesium chloride.Water-free magnesium chloride granule Geldart-D particle Method is a part for dewatering process, water-free magnesium chloride granule conveying and its storage facilities must be completely moisture-proof.
In conclusion needing to invent a kind of pneumatic conveying method of water-free magnesium chloride granule, the most using pneumatic dispatch Economy is convenient.And solve the problems, such as that process costs are higher.
Invention content
The application's is designed to provide a kind of water-free magnesium chloride granule carrying method, passes through following technical proposals solution Certainly:
A kind of water-free magnesium chloride granule pneumatic conveying method comprising anhydrous magnesium chloride is conveyed by air-transport system.
Preferably, the anhydrous magnesium chloride is delivered to the nothing of electrolysis zone by the drying compressed air in air-transport system Aqueous magnesium chloride Storage Silo.
Preferably, the air-transport system is positive pneumatic conveying system, and operating pressure is 0.4~0.7MPa, described The pressure of air-transport system drying compressed air is 0.6-0.7Mpa.
Preferably, the water-free magnesium chloride granule pneumatic conveying method, further includes following step:
Screening, screens out bulky grain and block and is stored in dry particl feed bin;
Charging adds the anhydrous magnesium chloride to sending cans;
Material issuing, the sending cans convey anhydrous magnesium chloride to electrolysis zone;
Pneumatic conveying pipeline block clearing;
Preferably, the step of wherein air-transport system conveys anhydrous magnesium chloride is after screening and addition step.
Preferably, in screening step, the anhydrous magnesium chloride is promoted to the top of vibrating screen by bucket elevator;
Preferably, the vibrating screen screens to obtain qualified anhydrous magnesium chloride grain size less than 3.0mm.
Preferably, in screening step, the obtained unqualified water-free magnesium chloride granule that screens be dissolved in water following Ring utilizes.
Preferably, the anhydrous magnesium chloride Geldart-D particle can be as needed, feeds at one, in many places discharging.
Preferably, in material issuing step, the sending cans are two, and conveying water-free magnesium chloride granule has continuity.
Preferably, the time of the material issuing of the sending cans is greater than feed time.
Preferably, in Pneumatic conveying pipeline block clearing step, as needed, increase the roads n Pneumatic conveying pipeline and carry out block clearing Pipeline, wherein n>1.
The present invention the technical problem to be solved is that, for the deficiency in existing production technology, provides a kind of continuous first The technique of the Geldart-D particle anhydrous magnesium chloride of feed.System can effectively be simplified, keep process equipment quantity and operating frequency notable It reduces, dielectric gas can also be avoided to discharge,
In order to solve the above technical problem, the present invention provides a kind of pneumatic conveying methods of anhydrous magnesium chloride, including with Lower step:Screening, screens out bulky grain and block and is stored in dry particl feed bin;Air source controls, the anhydrous magnesium chloride pneumatic transporting Send system air pressure control;Charging adds the anhydrous magnesium chloride to sending cans;Material issuing, the sending cans are defeated to electrolysis zone Send anhydrous magnesium chloride;Pneumatic conveying pipeline block clearing.
Further, the anhydrous magnesium chloride is given up the water chlorine that old halogen obtains by the tail washings after the potash fertilizer production that is dissolved in water Magnesite and prepare.
Further, the anhydrous magnesium chloride is promoted to the top of vibrating screen by bucket elevator.
Further, the vibrating screen screens to obtain qualified water-free magnesium chloride granule grain size and is respectively less than 3.0mm.
Further, the unqualified water-free magnesium chloride granule screened be dissolved in water recycling, and prepares anhydrous Magnesium chloride.
Further, the anhydrous magnesium chloride is delivered to the anhydrous magnesium chloride warehouse of electrolysis zone by drying compressed air.
Further, the pressure of the drying compressed air is 0.6-0.7Mpa.
Further, the water-free magnesium chloride granule anhydrous magnesium chloride Geldart-D particle can feed at one, then in many places Discharging.
Further, the sending cans are two, a preparation and a use.
Further, the time of the material issuing of the sending cans is greater than feed time.
Further, the pipeline of the Geldart-D particle increases several roads (depending on field condition is clear) block clearing pipeline.
The beneficial effects of the present invention are:
(1) carrying method of the present invention carries out dispersion conveying suitable for any to multiple spot, of low cost, it is easy to accomplish industrialization Production;
(2) carrying method of the present invention conveys anhydrous magnesium chloride, carrying method energy-saving ring in closed conduit along airflow direction It protects;
(3) carrying method of the present invention is easy to operate, can make horizontal, vertical or inclined direction conveying, cost-effective.
Description of the drawings
Fig. 1 is the flow precedence diagram of water-free magnesium chloride granule pneumatic conveying method of the present invention.
Fig. 2 is drying compressed air pressure control block diagram in water-free magnesium chloride granule pneumatic conveying method of the present invention.
Fig. 3 is the process flow chart of water-free magnesium chloride granule pneumatic conveying method of the present invention.
Embodiment
Below in conjunction with the accompanying drawings, a kind of water-free magnesium chloride granule pneumatic conveying method of the present invention is described in detail.Referring to Fig. 1, a kind of water-free magnesium chloride granule pneumatic conveying method of the invention include the following steps:S1:Screening, screens out bulky grain and block Expect and is stored in dry particl feed bin;S2:Air source controls, the anhydrous magnesium chloride air-transport system air-pressure controlling;S3 adds Material adds the anhydrous magnesium chloride to sending cans;S4:Material issuing, the sending cans convey anhydrous magnesium chloride to electrolysis zone;S5:Gas Power conveyance conduit block clearing.
It should be noted that water-free magnesium chloride granule of the present invention is given up old halogen by the tail washings after the potash fertilizer production that is dissolved in water Obtained bischofite and prepare.In potassium fertilizer production process, obtained useless old halogen is containing there are many cations, such as K+、Na+、 Ca2+、Mg2+、B2+、Li+、Sr2+、Rb+、Cs+And a variety of anion, such as Cl-、SO4 2-、CO3 2-、HCO3 -、Br-、I-.Wherein, Mg2+Content it is most.Salt pan is introduced by the old halogen that will give up to ted to obtain bischofite.Then bischofite add water-soluble Solution, refined purification, acid-base neutralization, evaporation and concentration, mist projection granulating, air atmosphere dehydrate to obtain 130-160 DEG C of semi-finished product, HCI atmosphere dehydrates to obtain 300-370 DEG C of high-temperature anhydrous magnesium chloride granules, by a rectangular fluidized bed cooler Be in contact to realize with cooling drying compressed air is cooled to 90 DEG C hereinafter, obtaining high-purity anhydrous magnesium chloride.
Referring to Fig. 3, a kind of process flow chart of water-free magnesium chloride granule pneumatic conveying method of the present invention is illustrated.S1:Sieve Choosing, screens out bulky grain and block and is stored in dry particl feed bin.Anhydrous magnesium chloride in cooler is by revolving valve from fluid bed Discharge sets herein there are one sample point, the quality of final anhydrous magnesium chloride, qualified anhydrous chlorine is analyzed according to the content of moisture Change the top that magnesium is promoted to vibrating screen through bucket elevator, vibrating screen working portion is fixed, leans on water-free magnesium chloride granule edge Working face slides and material is made to be sieved, to remove underproof bulky grain and block.Vibrating screen is disposed on a sealing Room in, with prevent it is dry after the secondary moisture absorption of particle.After screening, material enters in dry particl feed bin.Underproof Pellet is driven into useless particle feed bin from the reversal valve of bucket elevator outlet device, and useless particle will be used as intermediate products export trade.
Referring to Fig. 2, drying compressed air pressure in a kind of water-free magnesium chloride granule pneumatic conveying method of the present invention is illustrated Control block diagram.S2:Air source controls, the anhydrous magnesium chloride air-transport system air-pressure controlling.The gas of magnesium chloride granules Power transport system is equipped with a 10m3Air accumulator, convey anhydrous magnesium chloride drying compressed air (dew point be subzero 50 DEG C, pressure Power be not less than 0.68Mpa) introduce air accumulator after, the pressure of air accumulator should be maintained at 0.6-0.7Mpa.When conveying starts, upper Position machine setting output drying compressed air pressure, for pressure controller by chain direct-operated regulator, auto-adjustment control output is dry Dry compressed air pressure is in setting value.Current output pressure value, is shown by pressure measurement pick-up device on host computer.It is dry Dry compressed air is used for conveying granular material after gas control unit automatic pressure regulation and flow.
Referring to Fig. 3, a kind of process flow chart of water-free magnesium chloride granule pneumatic conveying method of the present invention is illustrated.S3:Add Material adds the anhydrous magnesium chloride to sending cans.Two sending cans share a pocket type pulsed dust collector, sending cans 1 and transmission Tank 2 belongs to the using and the reserved, carries out a charging, a transport model.That is a sending cans are when conveying, another hair Tank sending feeds, and does the preparation sent, ensures that sending cans friction feeding in this way.Start to be fed to canful time have to it is small In the time of transmission.Valve V1 and V3 control water-free magnesium chloride granule is sent into of sending cans 1 and sending cans 2 by dry particl feed bin Grain amount, water-free magnesium chloride granule enter sending cans by gravity by the vibrating screen.Operating personnel select particulate material conveying Program controls, then is automatically performed charging and the material issuing action of sending cans.Prepare material issuing with sending cans 2, sending cans 1 prepare charging and are Example.After the low alarm switch feedback signal 60S of material position, illustrate that material has conveyed completion in sending cans 1, material issuing valve V2 is closed, dry pressure The valve of contracting air purging sending cans is then turned off, and deduster starts, and the exhaust relief valve of sending cans 1 automatically opens, by taking away It is discharged after the deduster filtering of heart wind turbine, the dust in sack cleaner can periodically drain into dry particl feed bin and be recycled, tail gas Reach discharge standard heel row air into exhaust gas cleaner.Charging valve V1 is automatically opened, and sending cans 1 enter charging state, directly To 1 material position height report switch feedback signal of sending cans.Sending cans 1 complete charging.
Referring to Fig. 3, a kind of process flow chart of water-free magnesium chloride granule pneumatic conveying method of the present invention is illustrated.S4:Hair Material, the sending cans convey anhydrous magnesium chloride to electrolysis zone.Valve V2 and V4 control water-free magnesium chloride granule is by sending cans 1 and hair Tank sending 2 is delivered to the grain amount of the 8 anhydrous magnesium chloride warehouses in electrolysis zone.The anhydrous magnesium chloride that sending cans 1 and sending cans 2 convey Grain commutates by three-way diverter valve, and material is made to enter 8 specified anhydrous magnesium chloride warehouses (abbreviation warehouse 1, warehouse 2, storage Storehouse 3, warehouse 4, warehouse 5, warehouse 6, warehouse 7, warehouse 8).The work of water-free magnesium chloride granule in sending cans in drying compressed air Under, water-free magnesium chloride granule is made to be delivered in the anhydrous magnesium chloride warehouse in electrolysis region.Operating personnel select particulate material conveying Program controls, then is automatically performed charging and the material issuing action of sending cans.Prepare to feed with sending cans 1, sending cans 2 prepare material issuing and are Example.V4 is opened, and is opened into the drying compressed air valve of sending cans and conveyance conduit, and magnesium chloride granules are dispelled, at suspension State is transported to specified water-free magnesium chloride granule warehouse, and sending cans 2 enter material issuing state, until the low material position of sending cans 2 Alarm switch feedback signal.Prove that 2 material issuing of sending cans is completed.Water-free magnesium chloride granule is delivered to 8 anhydrous chlorinations of electrolysis zone In magnesium granules warehouse.Pneumatic three-way change valve will select the particle which silo be supplied to.It is stored in water-free magnesium chloride granule storage Water-free magnesium chloride granule in storehouse is transported to the buffer bin of potroom by drying compressed air air-transport system, to electricity Solve area's cell feed material.
Referring to Fig. 1, a kind of flow precedence diagram of water-free magnesium chloride granule pneumatic conveying method of the present invention is illustrated.S5:Gas Power conveyance conduit block clearing.Since anhydrous magnesium chloride conveying is continuous, distance, hoisting depth is big, is increased with conveyance conduit several Road block clearing pipeline.Air-transport system pipeline is provided with block clearing pipeline, the block clearing pipeline and air accumulator and Pneumatic conveying pipeline It is connected with each other.Drying compressed air by pressure higher than conveying water-free magnesium chloride granule is passed through in air-transport system in dispelling It lumps in portion.Drying compressed air (0.6-0.7Mpa) is directly from air accumulator, without operated pressure-reducing valve regulation pressure.Strength Transport system pipeline is provided with the pressure inside pressure sensor measurement conveyance conduit, if pressure is more than the pressure normally conveyed Power, it was demonstrated that i.e. by plugging, block clearing pipeline is opened, and is dispelled internal sprue, is reached normal conveying.
Several preferred embodiments of the application have shown and described in above description, but as previously described, it should be understood that the application Be not limited to form disclosed herein, be not to be taken as excluding other embodiments, and can be used for various other combinations, Modification and environment, and the above teachings or related fields of technology or knowledge can be passed through in the scope of the invention is set forth herein It is modified.And changes and modifications made by those skilled in the art do not depart from spirit and scope, then it all should be in this Shen It please be in the protection domain of appended claims.

Claims (6)

1. a kind of water-free magnesium chloride granule pneumatic conveying method, it is characterised in that include the following steps:
Screening, screens out bulky grain and block and is stored in dry particl feed bin;
Charging adds the anhydrous magnesium chloride to sending cans;
Conveying, air-transport system convey anhydrous magnesium chloride;
Material issuing, the sending cans convey anhydrous magnesium chloride to electrolysis zone;
Pneumatic conveying pipeline block clearing;
Wherein in the step of conveying anhydrous magnesium chloride by air-transport system, the anhydrous magnesium chloride passes through Geldart-D particle system Drying compressed air in system is delivered to the anhydrous magnesium chloride Storage Silo of electrolysis zone;The air-transport system is positive-pressure pneumatic Transport system, operating pressure are 0.4~0.7MPa, and the pressure of the air-transport system drying compressed air is 0.6- 0.7Mpa。
2. water-free magnesium chloride granule pneumatic conveying method according to claim 1, it is characterised in that:In screening step, The anhydrous magnesium chloride is promoted to the top of vibrating screen by bucket elevator;The vibrating screen screens to obtain qualified anhydrous chlorine Change magnesium grain size and is less than 3.0mm.
3. water-free magnesium chloride granule pneumatic conveying method according to claim 1, it is characterised in that:In screening step, The obtained unqualified water-free magnesium chloride granule that screens be dissolved in water recycling.
4. water-free magnesium chloride granule pneumatic conveying method according to claim 1, it is characterised in that:The Geldart-D particle system , can be as needed in system conveying anhydrous magnesium chloride step, it feeds at one, in many places discharging.
5. water-free magnesium chloride granule pneumatic conveying method according to claim 1, it is characterised in that:In material issuing step, The sending cans are two, and conveying water-free magnesium chloride granule has continuity.
6. water-free magnesium chloride granule pneumatic conveying method according to claim 5, it is characterised in that:The hair of the sending cans The time of material is greater than feed time;In Pneumatic conveying pipeline block clearing step, as needed, increase the roads n Pneumatic conveying pipeline Carry out block clearing pipeline, wherein n>1.
CN201810293189.6A 2018-04-04 2018-04-04 A kind of water-free magnesium chloride granule pneumatic conveying method Pending CN108502547A (en)

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CN201810293189.6A CN108502547A (en) 2018-04-04 2018-04-04 A kind of water-free magnesium chloride granule pneumatic conveying method

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Application Number Priority Date Filing Date Title
CN201810293189.6A CN108502547A (en) 2018-04-04 2018-04-04 A kind of water-free magnesium chloride granule pneumatic conveying method

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203998103U (en) * 2014-06-24 2014-12-10 河南竹林耐材有限公司 Fine powder aggregate air transporting arrangement
CN206013891U (en) * 2016-08-31 2017-03-15 上海隆麦机械设备工程有限公司 A kind of strength stone coal delivery system
CN206466724U (en) * 2017-01-17 2017-09-05 新疆华电哈密热电有限责任公司 A kind of pneumatic transporting slag system

Patent Citations (3)

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Publication number Priority date Publication date Assignee Title
CN203998103U (en) * 2014-06-24 2014-12-10 河南竹林耐材有限公司 Fine powder aggregate air transporting arrangement
CN206013891U (en) * 2016-08-31 2017-03-15 上海隆麦机械设备工程有限公司 A kind of strength stone coal delivery system
CN206466724U (en) * 2017-01-17 2017-09-05 新疆华电哈密热电有限责任公司 A kind of pneumatic transporting slag system

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