CN110102171A - A kind of lepidolite ore pretreatment device for absorbing tail gas and method - Google Patents

A kind of lepidolite ore pretreatment device for absorbing tail gas and method Download PDF

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Publication number
CN110102171A
CN110102171A CN201910341934.4A CN201910341934A CN110102171A CN 110102171 A CN110102171 A CN 110102171A CN 201910341934 A CN201910341934 A CN 201910341934A CN 110102171 A CN110102171 A CN 110102171A
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Prior art keywords
milk
gas
storage tank
lime
jet pump
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CN201910341934.4A
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李大炳
杨志平
刘辉
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Beijing Research Institute of Chemical Engineering and Metallurgy of CNNC
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Beijing Research Institute of Chemical Engineering and Metallurgy of CNNC
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Priority to CN201910341934.4A priority Critical patent/CN110102171A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/48—Sulfur compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/68—Halogens or halogen compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/80—Semi-solid phase processes, i.e. by using slurries
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/02—Other waste gases
    • B01D2258/025—Other waste gases from metallurgy plants

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Treating Waste Gases (AREA)
  • Gas Separation By Absorption (AREA)

Abstract

A kind of lepidolite ore pretreatment device for absorbing tail gas, including first order absorption system and second level absorption system, wherein first order absorption system includes jet pump A, slurry circulating pump A, milk of lime storage tank A, jet pump A includes gas access and gas vent, the gas access of jet pump A connects slurry circulating pump A, the gas vent of jet pump A connects milk of lime storage tank A, slurry circulating pump A connection milk of lime storage tank A；Second level absorption system includes jet pump B, slurry circulating pump B, milk of lime storage tank B, jet pump B includes gas access and gas vent, the gas access of milk of lime storage tank A connection jet pump B, slurry circulating pump B equally connects the gas access of jet pump B, the gas vent of jet pump B connects milk of lime storage tank B, slurry circulating pump B connection milk of lime storage tank B.

Description

A kind of lepidolite ore pretreatment device for absorbing tail gas and method
Technical field
The invention belongs to lithium resource development fields, and in particular to a kind of technology of lepidolite ore pretreatment tail gas absorption And device.
Background technique
Lithium carbonate is mainly used for the industries such as lithium battery, glass ceramics, air-conditioning refrigerant, metallurgy.Lithium battery is commonly used to hand Machine, notebook, camera, electric tool, electric bicycle etc., with the rise of new-energy automobile and energy storage industry, lithium battery Market more expands, it is contemplated that the demand of lithium carbonate will be in explosive growth in the coming years.Lithium ore resources can be divided into Brine resources With mineral resources two major classes, mineral lithium resource is broadly divided into spodumene and two kinds of lepidolite.Wherein lepidolite is that China is distinctive A kind of lithium ore resources, reserves are huge, and China can be effectively relieved to the strong of lithium carbonate product by carrying out economical and efficient exploitation to lepidolite Strength demand.
Lepidolite belongs to interlayer short of electricity position mica subtribe, is layer silicate, by aluminum-oxygen tetrahedron and silicon oxygen four sides Body constitutes skeleton, Li+、Al3+Octahedral site in interstitital texture.Its molecular formula: KLi2Al(Si4O11)(F,OH)2Or it is write as: 3SiO2·Al2O32 [(Li, K) (F, OH)] have continuous stratiform oxygen-octahedron structure.The key that lepidolite leaches is It opens and destroys the stable continuous stratiform oxygen-octahedron structure of lepidolite, it usually needs first carry out high temperature defluorinate roasting plus salt Water logging or acidleach are carried out again after roasting or mixing the pretreatments such as acid curing.It unavoidably generates and contains in lepidolite preprocessing process Fluorine, sulfur-containing tail gas, these tail gas, which are directly discharged into atmosphere, will cause very big pollution, it is necessary to be handled.Suitable lepidolite is located in advance Reason tail gas absorption technology and device are the necessary condition of lepidolite development of resources, the at present absorption about tail gas such as fluorine-containing, sulfur-bearings It is generally carried out using sodium hydroxide solution by packed tower, although there is preferable absorption efficiency, absorption reagent is at high cost, gained Absorbing liquid subsequent processing is difficult, and packed tower and corresponding ancillary equipment are relatively more.Therefore, it is generated for lepidolite ore pretreatment Exhaust gas is of great significance using adaptable simple economy efficient absorption technique and device.
Summary of the invention
It is an object of the invention to: for lepidolite ore defluorinate roasting, plus salt roasting or mix acid curing etc. it is pretreated The problems such as generating fluorine-containing, sulphur-containing exhaust gas in journey, polluting environment.Using cheap milk of lime as fluorine-containing, sulfur-containing tail gas absorption Reagent realizes fluorine-containing, sulfur-containing tail gas efficient absorption by ejector system, and is converted into it and stablizes tractable calcium salt, It effectively prevents it and is directly discharged into the problem of atmosphere causes environmental hazard, established base for the exploitation of lepidolite ore economical and efficient Plinth.
Technical scheme is as follows: a kind of lepidolite ore pretreatment device for absorbing tail gas, including first order absorption system With second level absorption system, wherein first order absorption system includes jet pump A, slurry circulating pump A, milk of lime storage tank A, jet pump A packet Gas access and gas vent are included, the gas access of jet pump A connects slurry circulating pump A, and the gas vent of jet pump A connects stone Grey cream storage tank A, slurry circulating pump A connection milk of lime storage tank A；Second level absorption system includes jet pump B, slurry circulating pump B, lime Newborn storage tank B, jet pump B include gas access and gas vent, the gas access of milk of lime storage tank A connection jet pump B, and slurry follows Ring pump B equally connects the gas access of jet pump B, and the gas vent of jet pump B connects milk of lime storage tank B, and slurry circulating pump B connects Meet milk of lime storage tank B；
Milk of lime calcium oxide content 5%~30% in the milk of lime storage tank A, milk of lime storage tank B.
There is gas-liquid separator above the milk of lime storage tank A, milk of lime storage tank B.
A kind of lepidolite ore pre-processes tail gas absorption method, it is described the following steps are included:
Milk of lime in milk of lime storage tank A is squeezed into jet pump A by S1: slurry circulating pump A, in jet pump A, tail gas and lime Cream mixing, tail gas are reacted with milk of lime and are absorbed, and enter milk of lime storage tank A；
S2: a small amount of unabsorbed tail gas enters jet pump B after the gas-liquid separator separates above milk of lime storage tank A, Milk of lime in milk of lime storage tank B is squeezed into jet pump B by slurry circulating pump B, and a small amount of unabsorbed tail gas and milk of lime are into one Step enters milk of lime storage tank B after absorbing；
The tail gas includes fluoro-gas.
The tail gas includes sulfurous gas.
The tail gas includes gas containing HF.
Further include S3: through S2 treated residual gas after the gas-liquid separator separates above milk of lime storage tank B6 directly It is discharged into atmosphere.
Remarkable result of the invention is: roasting for the defluorinate of lepidolite high temperature, salt is added to roast or mix acid curing pretreatment Fluorine-containing, the sulfur-containing tail gas generated is connected milk of lime slurry by ore slurry pump using cheap milk of lime slurry as absorption reagent Continuous circulation squeezes into jet pump, sprays at nozzle and forms high-speed jet, generates volume with fluorine-containing, the sulfur-containing tail gas sucked herein and inhales Effect and turbulent diffusion and realize efficient blended absorbent.It is absorbed by second level, which generates lepidolite pretreatment Fluorinated tail gas absorptivity is up to 98% or more, to sulfurous gas absorptivity up to 95% or more, fully meet to it is fluorine-containing in tail gas, contain The efficient absorption of sulphur ingredient makes discharge gas composition reach outlet standard, meets the requirement of environmental protection.The invention use technique and Device is simply applicable in, and to fluorine-containing in lepidolite pretreatment tail gas, sulfur-bearing ingredient draws are high-efficient, protect environment, is had higher Industrial application value.
Detailed description of the invention
Fig. 1 is that lepidolite ore of the present invention pre-processes device for absorbing tail gas schematic diagram；
In figure: jet pump A1, slurry circulating pump A2, milk of lime storage tank A3, jet pump B4, slurry circulating pump B5, milk of lime Storage tank B6
Specific embodiment
A kind of lepidolite ore pretreatment device for absorbing tail gas, including first order absorption system and second level absorption system, wherein one It includes that gas access goes out with gas that grade absorption system, which includes jet pump A1, slurry circulating pump A2, milk of lime storage tank A3, jet pump A1, Mouthful, the gas access of jet pump A1 connects slurry circulating pump A2, and the gas vent of jet pump A1 connects milk of lime storage tank A3, slurry Circulating pump A2 connection milk of lime storage tank A3；Second level absorption system includes jet pump B4, slurry circulating pump B5, milk of lime storage tank B6, Jet pump B4 includes gas access and gas vent, the gas access of milk of lime storage tank A3 connection jet pump B4, slurry circulating pump B5 equally connects the gas access of jet pump B4, and the gas vent of jet pump B4 connects milk of lime storage tank B6, slurry circulating pump B5 Connect milk of lime storage tank B6；There is gas-liquid separator above milk of lime storage tank A3, milk of lime storage tank B6；
A kind of lepidolite ore pretreatment tail gas absorption method, comprising the following steps:
Milk of lime in milk of lime storage tank A3 is squeezed into jet pump A1 by S1: slurry circulating pump A2, in jet pump A1, tail gas with Milk of lime mixes, and fluorine-containing, the sulfurous gas in tail gas are reacted with milk of lime and be absorbed, and enters milk of lime storage tank A3；
S2: a small amount of unabsorbed tail gas enters jet pump after the gas-liquid separator separates above milk of lime storage tank A3 Milk of lime in milk of lime storage tank B6 is squeezed into jet pump B4 by B4, slurry circulating pump B5, a small amount of unabsorbed fluorine-containing, sour gas Body and milk of lime enter milk of lime storage tank B6 after further absorbing；
S3: through S2, treated that residual gas is directly discharged into greatly after the gas-liquid separator separates above milk of lime storage tank B6 Gas.
Milk of lime calcium oxide content 5%~30% in the milk of lime storage tank A3, milk of lime storage tank B6.
Embodiment (1): the tail gas generated to lepidolite ore high temperature defluorinate roasting absorbs, the main HF absorbed in tail gas Gas uses 15% milk of lime for absorbent in milk of lime storage tank A3, milk of lime storage tank B6, comprising the following steps:
Milk of lime in milk of lime storage tank A3 is squeezed into jet pump A1 by S1: slurry circulating pump A2, in jet pump A1, tail gas with Milk of lime mixes, and the HF gas in tail gas is reacted with milk of lime and is absorbed, and enters milk of lime storage tank A3
S2: a small amount of unabsorbed HF gas enters jet pump after the gas-liquid separator separates above milk of lime storage tank A3 Milk of lime in milk of lime storage tank B6 is squeezed into jet pump B4 by B4, slurry circulating pump B5, a small amount of unabsorbed HF gas and stone Grey cream enters milk of lime storage tank B6 after further absorbing.
S3: through S2, treated that residual gas is directly discharged into greatly after the gas-liquid separator separates above milk of lime storage tank B6 Gas
It is absorbed by second level, lepidolite ore high temperature defluorinate roasts the absorptivity 99% of fluorine in fluorinated tail gas, and residual gas reaches To outlet standard.
Embodiment (2): mixing the tail gas that acid curing generates to lepidolite ore and absorb, it is main absorb in tail gas it is fluorine-containing, Sulfurous gas.Use 20% milk of lime for absorbent in milk of lime storage tank A3, milk of lime storage tank B6.The following steps are included:
Milk of lime in milk of lime storage tank A3 is squeezed into jet pump A 1 by S1: slurry circulating pump A2, in jet pump A1, tail gas It is mixed with milk of lime, the HF gas in tail gas is reacted with milk of lime and is absorbed, and enters milk of lime storage tank A3；
S2: a small amount of unabsorbed fluorine-containing, sulfurous gas is laggard through the gas-liquid separator separates above milk of lime storage tank A3 Enter jet pump B4, the milk of lime in milk of lime storage tank B6 is squeezed into jet pump B4 by slurry circulating pump B5, a small amount of unabsorbed HF Gas and milk of lime enter milk of lime storage tank B6 after further absorbing；
S3: through S2, treated that residual gas is directly discharged into greatly after the gas-liquid separator separates above milk of lime storage tank B6 Gas
It is absorbed through second level, lepidolite ore mixes in acid curing tail gas that sulfurous gas absorptivity is up to 98%, fluoro-gas absorptivity Up to 99.5%, residual gas reaches outlet standard.
Embodiment (3): the tail gas generated to lepidolite ore plus salt roasting absorbs, it is main absorb in tail gas it is fluorine-containing, Sulfurous gas.Use 10% milk of lime for absorbent in milk of lime storage tank A3, milk of lime storage tank B6.The following steps are included:
Milk of lime in milk of lime storage tank A3 is squeezed into jet pump A 1 by S1: slurry circulating pump A2, in jet pump A1, tail gas It is mixed with milk of lime, fluorine-containing, the sulfurous gas in tail gas are reacted with milk of lime and be absorbed, and enter milk of lime storage tank A3
S2: a small amount of unabsorbed fluorine-containing, sulfurous gas is laggard through the gas-liquid separator separates above milk of lime storage tank A3 Enter jet pump B4, the milk of lime in milk of lime storage tank B6 is squeezed into jet pump B4 by slurry circulating pump B5, a small amount of unabsorbed HF Gas and milk of lime enter milk of lime storage tank B6 after further absorbing.
S3: through S2, treated that residual gas is directly discharged into greatly after the gas-liquid separator separates above milk of lime storage tank B6 Gas
It is absorbed through second level, lepidolite ore mixes the absorptivity of fluorine in acid curing tail gas up to 98%, and fluoro-gas absorptivity reaches 98.5%, residual gas reaches outlet standard.

Claims (8)

1. a kind of lepidolite ore pre-processes device for absorbing tail gas, it is characterised in that: absorb system including first order absorption system and second level System, wherein first order absorption system includes jet pump A (1), slurry circulating pump A (2), milk of lime storage tank A (3), jet pump A (1) packet Gas access and gas vent are included, the gas access of jet pump A (1) connects slurry circulating pump A (2), the gas of jet pump A (1) Outlet connection milk of lime storage tank A (3), slurry circulating pump A (2) connection milk of lime storage tank A (3)；Second level absorption system includes injection B (4), slurry circulating pump B (5), milk of lime storage tank B (6) are pumped, jet pump B (4) includes gas access and gas vent, milk of lime The gas access of storage tank A (3) connection jet pump B (4), the gas access of slurry circulating pump B (5) equally connection jet pump B (4), The gas vent of jet pump B (4) connects milk of lime storage tank B (6), slurry circulating pump B (5) connection milk of lime storage tank B (6).
2. a kind of lepidolite ore according to claim 1 pre-processes device for absorbing tail gas, it is characterised in that: the milk of lime Milk of lime calcium oxide content 5%~30% in storage tank A (3), milk of lime storage tank B (6).
3. a kind of lepidolite ore according to claim 1 pre-processes device for absorbing tail gas, it is characterised in that: the milk of lime There is gas-liquid separator above storage tank A (3), milk of lime storage tank B (6).
4. a kind of a kind of application method of lepidolite ore pretreatment device for absorbing tail gas as claimed in claim 3, feature exist In: it is described the following steps are included:
Milk of lime in milk of lime storage tank A (3) is squeezed into jet pump A (1) by S1: slurry circulating pump A (2), in jet pump A (1), tail Gas is mixed with milk of lime, and tail gas is reacted with milk of lime and is absorbed, and enters milk of lime storage tank A3；
S2: a small amount of unabsorbed tail gas enters jet pump B after the gas-liquid separator separates above milk of lime storage tank A (3) (4), the milk of lime in milk of lime storage tank B (6) is squeezed into jet pump B (4) by slurry circulating pump B (5), a small amount of unabsorbed tail gas Enter milk of lime storage tank B (6) after further absorbing with milk of lime.
5. a kind of lepidolite ore according to claim 4 pre-processes tail gas absorption method, it is characterised in that: the tail gas packet Include fluoro-gas.
6. a kind of lepidolite ore according to claim 4 pre-processes tail gas absorption method, it is characterised in that: the tail gas packet Include sulfurous gas.
7. a kind of lepidolite ore according to claim 4 pre-processes tail gas absorption method, it is characterised in that: the tail gas packet Include gas containing HF.
8. a kind of lepidolite ore according to claim 4 pre-processes tail gas absorption method, it is characterised in that: further include S3: Through S2, treated that residual gas is directly discharged into atmosphere after the gas-liquid separator separates above milk of lime storage tank B (6).
CN201910341934.4A 2019-04-26 2019-04-26 A kind of lepidolite ore pretreatment device for absorbing tail gas and method Pending CN110102171A (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1085118A (en) * 1992-10-05 1994-04-13 朱水生 A kind of method of smoke-absorbing, purifying sterilization and equipment thereof
CN101279196A (en) * 2008-05-27 2008-10-08 湖北三新磷钙有限公司 Double return route absorption tower and method for treating fluorine contained tail gas using double return route absorption tower
FR3007297A1 (en) * 2013-06-25 2014-12-26 Lhoist Rech & Dev Sa METHOD AND DEVICE FOR TREATING GAS BY INJECTION OF PULVERULENT COMPOUND
CN107569998A (en) * 2017-09-27 2018-01-12 湖南新龙矿业有限责任公司 A kind of mine tailing smelts three wastes desulphurization system and method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1085118A (en) * 1992-10-05 1994-04-13 朱水生 A kind of method of smoke-absorbing, purifying sterilization and equipment thereof
CN101279196A (en) * 2008-05-27 2008-10-08 湖北三新磷钙有限公司 Double return route absorption tower and method for treating fluorine contained tail gas using double return route absorption tower
FR3007297A1 (en) * 2013-06-25 2014-12-26 Lhoist Rech & Dev Sa METHOD AND DEVICE FOR TREATING GAS BY INJECTION OF PULVERULENT COMPOUND
CN107569998A (en) * 2017-09-27 2018-01-12 湖南新龙矿业有限责任公司 A kind of mine tailing smelts three wastes desulphurization system and method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
张深根等: "《典型废旧稀土材料循环利用技术》", 30 November 2018, 北京：冶金工业出版社 *

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Application publication date: 20190809