CN106474876A - The process reuse method of chlorinated exhaust in a kind of titanium sponge production - Google Patents

The process reuse method of chlorinated exhaust in a kind of titanium sponge production Download PDF

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Publication number
CN106474876A
CN106474876A CN201611090376.1A CN201611090376A CN106474876A CN 106474876 A CN106474876 A CN 106474876A CN 201611090376 A CN201611090376 A CN 201611090376A CN 106474876 A CN106474876 A CN 106474876A
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CN
China
Prior art keywords
fecl
water
gas
hydrochloric acid
filtrate
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Pending
Application number
CN201611090376.1A
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Chinese (zh)
Inventor
张芋
石玉英
邹国华
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PANZIHUA STEEL XINYU CHEMICAL CO Ltd
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PANZIHUA STEEL XINYU CHEMICAL CO Ltd
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Application filed by PANZIHUA STEEL XINYU CHEMICAL CO Ltd filed Critical PANZIHUA STEEL XINYU CHEMICAL CO Ltd
Priority to CN201611090376.1A priority Critical patent/CN106474876A/en
Publication of CN106474876A publication Critical patent/CN106474876A/en
Pending legal-status Critical Current

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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
    • B01D53/14—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 by absorption
    • B01D53/1456—Removing acid components
    • 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
    • B01D53/77—Liquid phase processes
    • B01D53/78—Liquid phase processes with gas-liquid contact
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G23/00—Compounds of titanium
    • C01G23/04—Oxides; Hydroxides
    • C01G23/047—Titanium dioxide
    • C01G23/053—Producing by wet processes, e.g. hydrolysing titanium salts
    • C01G23/0536—Producing by wet processes, e.g. hydrolysing titanium salts by hydrolysing chloride-containing salts
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G49/00—Compounds of iron
    • C01G49/10—Halides

Abstract

The invention discloses in a kind of titanium sponge production chlorinated exhaust process reuse method, the material that can be produced after effective recycling tail gas filtering.To produce in chloride process production process comprising HCl, TiCl4Water scrubber is entered with the tail gas of chlorine, abraum salt acid solution and water-fast gas is obtained after washing filtering；Water-fast gas will enter in caustic wash tower and carry out alkali cleaning filtration after water scrubber is filtered, gas up to standard is obtained after filtration and is discharged；The abraum salt acid solution of gained is filtered, obtains the filter residue of watery hydrochloric acid filtrate and main component for metatitanic acid；The filter residue for obtaining is carried out calcination processing, obtains titanium dioxide；Scrap iron is added in the watery hydrochloric acid filtrate for obtaining, and scrap iron generates FeCl with hydrochloric acid reaction3Afterwards, FeCl3FeCl is generated with excessive iron reaction2, then it is passed through chlorine reaction generation FeCl3, circulate this step FeCl in the filtrate3Concentration be more than 41%.

Description

The process reuse method of chlorinated exhaust in a kind of titanium sponge production
Technical field
The present invention relates in titanium sponge production field, especially a kind of titanium sponge production chlorinated exhaust process recycling side Method.
Background technology
During titanium sponge production, chloridization process production can be produced containing HCl, TiCl4With the acid waste gas of chlorine, this Therefore acid waste gas are filtered, in washable waste gas by the general all hydrolyzables of the gas that includes in acid discarded using washing Sour gas produce waste hydrochloric acid, the processing mode of this waste hydrochloric acid is usually to be directly discharged in sewage disposal system, through neutralization Industry water is re-used as after aeration, precipitation and filtration to be used, although the method can ensure that acid waste gas non-pollution discharge, can drop The low pollution to environment, but the load of follow-up sewage disposal in acid waste gas N-process, is increased, recycling process is relatively For loaded down with trivial details, the utilization ratio of resource is reduced.
Content of the invention
The technical problem to be solved is：A kind of process recycling side of chlorinated exhaust in titanium sponge production is provided Method, the material produced after energy effective recycling tail gas filtering.
For solving above-mentioned technical problem the technical solution adopted in the present invention it is：Chlorinated exhaust in a kind of titanium sponge production Reuse method is processed, is comprised the steps：
A, will in chloride process production process produce comprising HCl, TiCl4Water scrubber is entered with the tail gas of chlorine, pass through Abraum salt acid solution and water-fast gas is obtained after washing filtering；
B, water-fast gas will enter in caustic wash tower and carry out alkali cleaning filtration after water scrubber is filtered, obtain after filtration Gas up to standard is simultaneously discharged；
The abraum salt acid solution of gained in c, filtration step a, obtains the filter residue of watery hydrochloric acid filtrate and main component for metatitanic acid
D, the filter residue obtained in step c is carried out calcination processing, obtain titanium dioxide；
Scrap iron is added in e, the watery hydrochloric acid filtrate obtained in step c, and scrap iron generates FeCl with hydrochloric acid reaction3Afterwards, FeCl3 FeCl is generated with excessive iron reaction2, then it is passed through chlorine reaction generation FeCl3, circulate this step FeCl in the filtrate3Dense Degree is more than 41%.
It is further：Need to first pass through repeatedly before filter residue is calcined in step d and wash and filter, calcining heat is 920 ℃.
The invention has the beneficial effects as follows：The sour gas in tail gas is filtered using water scrubber, caustic wash tower can be processed in tail gas Chlorine, through washing and alkali cleaning after free of contamination gas is obtained, to after filtration produce filtrate and filter residue carry out respectively Process, FeCl is obtained3Solution and titanium dioxide, it is achieved that filter comprehensive recycling of residual matter, with good economic benefit, with When achieve the zero-emission of waste hydrochloric acid, environment protecting is strong.
Specific embodiment
For the ease of understanding the present invention, the present invention is further detailed with reference to embodiment.
In a kind of titanium sponge production of the present invention, the process reuse method of chlorinated exhaust, comprises the steps：
A, will in chloride process production process produce comprising HCl, TiCl4Water scrubber is entered with the tail gas of chlorine, pass through Abraum salt acid solution and water-fast gas is obtained after washing filtering；HCl and TiCl in this step4Formation soluble in water is containing heavy The abraum salt acid solution of starch, the gas containing chlorine enter downstream；
B, water-fast gas will enter in caustic wash tower and carry out alkali cleaning filtration after water scrubber is filtered, obtain after filtration Gas up to standard is simultaneously discharged；The chlorine being mainly in this step in filtration treatment tail gas；
The abraum salt acid solution of gained in c, filtration step a, obtains the filter residue of watery hydrochloric acid filtrate and main component for metatitanic acid
D, the filter residue obtained in step c is carried out calcination processing, obtain titanium dioxide；The main component of filter residue is water insoluble Metatitanic acid precipitation, first filter residue is repeatedly washed before being calcined and is filtered, the temperature of calcining is 920 DEG C；
Scrap iron is added in e, the watery hydrochloric acid filtrate obtained in step c, and scrap iron generates FeCl with hydrochloric acid reaction3Afterwards, FeCl3 FeCl is generated with excessive iron reaction2, then it is passed through chlorine reaction generation FeCl3, circulate this step FeCl in the filtrate3Dense Degree is more than 41%.
Embodiment
The chlorinated exhaust produced during titanium sponge production is passed directly into water scrubber, mainly contain in tail gas HCl, TiCl4And chlorine, there is hydrolysis in water scrubber, the waste hydrochloric acid of concentration about 25% is generated, be not washed with water the chlorine of tower absorption Gas etc. is passed through after caustic wash tower absorption is processed and obtains gas up to standard and discharged.Waste hydrochloric acid is divided into filtrate and filter by filtering Slag.Wherein filter residue is washed 3 times and is filtered, and then filter residue is calcined 1h at a high temperature of 920 DEG C, that is, is obtained titanium dioxide.To filtrate Excessive scrap iron is added, and chlorine is passed through, cyclic absorption reacts, and obtains 41.79% FeCl3Solution.

Claims (2)

1. in a kind of titanium sponge production chlorinated exhaust process reuse method, it is characterised in that：Comprise the steps：
A, will in chloride process production process produce comprising HCl, TiCl4Water scrubber is entered with the tail gas of chlorine, through water washed Abraum salt acid solution and water-fast gas is obtained after filter；
B, water-fast gas will enter in caustic wash tower and carry out alkali cleaning filtration after water scrubber is filtered, obtain after filtration up to standard Gas is simultaneously discharged；
The abraum salt acid solution of gained in c, filtration step a, obtains the filter residue of watery hydrochloric acid filtrate and main component for metatitanic acid；
D, the filter residue obtained in step c is carried out calcination processing, obtain titanium dioxide；
Scrap iron is added in e, the watery hydrochloric acid filtrate obtained in step c, and scrap iron generates FeCl with hydrochloric acid reaction3Afterwards, FeCl3With mistake The iron reaction of amount generates FeCl2, then it is passed through chlorine reaction generation FeCl3, circulate this step FeCl in the filtrate3Concentration big In 41%.
2. as claimed in claim 1 in a kind of titanium sponge production chlorinated exhaust process reuse method, it is characterised in that：Step In rapid d, filter residue needs to first pass through repeatedly before being calcined and washes and filter, and calcining heat is 920 DEG C.
CN201611090376.1A 2016-12-01 2016-12-01 The process reuse method of chlorinated exhaust in a kind of titanium sponge production Pending CN106474876A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201611090376.1A CN106474876A (en) 2016-12-01 2016-12-01 The process reuse method of chlorinated exhaust in a kind of titanium sponge production

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201611090376.1A CN106474876A (en) 2016-12-01 2016-12-01 The process reuse method of chlorinated exhaust in a kind of titanium sponge production

Publications (1)

Publication Number Publication Date
CN106474876A true CN106474876A (en) 2017-03-08

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107243237A (en) * 2017-08-17 2017-10-13 东方弗瑞德（北京）科技有限公司 A kind of TiCl4Device for absorbing tail gas and its absorption process
CN107281885A (en) * 2017-08-17 2017-10-24 东方弗瑞德（北京）科技有限公司 The processing method of waste gas during a kind of titanium sponge production
CN108191105A (en) * 2017-12-28 2018-06-22 攀枝花钢企欣宇化工有限公司 A kind of Shu Zhi Jing Hua processing method of chlorinated exhaust wastewater eluting
CN116036800A (en) * 2023-01-09 2023-05-02 中国成达工程有限公司 Method and system for treating and utilizing chlorinated tail gas

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CN203469786U (en) * 2013-08-05 2014-03-12 河南龙兴钛业有限公司 Respiratory gas processing device applicable to titanium tetrachloride production process
CN103432867A (en) * 2013-08-30 2013-12-11 漯河兴茂钛业股份有限公司 Method for comprehensively utilizing waste hydrochloric acid produced in chlorination eluting tail gas process in chlorination method titanium white production
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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107243237A (en) * 2017-08-17 2017-10-13 东方弗瑞德（北京）科技有限公司 A kind of TiCl4Device for absorbing tail gas and its absorption process
CN107281885A (en) * 2017-08-17 2017-10-24 东方弗瑞德（北京）科技有限公司 The processing method of waste gas during a kind of titanium sponge production
CN107243237B (en) * 2017-08-17 2020-05-01 东方弗瑞德（北京）科技有限公司 TiCl4Tail gas absorption device and absorption method thereof
CN108191105A (en) * 2017-12-28 2018-06-22 攀枝花钢企欣宇化工有限公司 A kind of Shu Zhi Jing Hua processing method of chlorinated exhaust wastewater eluting
CN108191105B (en) * 2017-12-28 2021-08-13 攀枝花钢企欣宇化工有限公司 Resin purification treatment method for leaching wastewater from chlorinated tail gas
CN116036800A (en) * 2023-01-09 2023-05-02 中国成达工程有限公司 Method and system for treating and utilizing chlorinated tail gas

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Application publication date: 20170308