CN109052460A - The method for preparing titanium tetrachloride using titanium slag electric furnace tail gas - Google Patents
The method for preparing titanium tetrachloride using titanium slag electric furnace tail gas Download PDFInfo
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- CN109052460A CN109052460A CN201811040763.3A CN201811040763A CN109052460A CN 109052460 A CN109052460 A CN 109052460A CN 201811040763 A CN201811040763 A CN 201811040763A CN 109052460 A CN109052460 A CN 109052460A
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- electric furnace
- tail gas
- titanium
- titanium tetrachloride
- titanium slag
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G23/00—Compounds of titanium
- C01G23/02—Halides of titanium
- C01G23/022—Titanium tetrachloride
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
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Abstract
The present invention relates to titanium tetrachloride field of production, especially one replaces the carbonaceous reducing agent in titanic chloride production process using the electric furnace exhaust gas that titanium slag smelting process generates, to reduce titanium tetrachloride production cost, realize the method for preparing titanium tetrachloride using titanium slag electric furnace tail gas of the resource utilization of exhaust gas, include the following steps: a, firstly, the tail gas from electric furnace obtained to titanium slag smelting process pre-processes；B, mixed gas is pressurized；C, it allows mixed gas and titanium slag to carry out chlorination reaction, finally obtains titanium tetrachloride product.The present invention realizes the recovery of latent heat of titanium slag smelting process tail gas from electric furnace, can reduce the petroleum coke consumption of chlorination process, can avoid polluting caused by processing tail gas, has significant economic benefit and environmental benefit, be especially suitable among the production of titanium slag smelting-titanium tetrachloride.
Description
Technical field
The present invention relates to titanium tetrachloride field of production, especially a kind of to prepare tetrachloro using titanium slag electric furnace tail gas
Change the method for titanium.
Background technique
Titanium or titanium alloy is widely used in navigating due to excellent properties such as small with density, specific strength is high, acid-alkali-corrosive-resistings
In empty space flight, derived energy chemical, medical instrument, metallurgy and the fields such as civilian.The key link of restriction titanium scale application is at present
Titanium sponge production cost is excessively high, and cost performance is lower than competing products such as stainless steels.Titanium tetrachloride is the important centre for preparing titanium sponge
Raw material, production cost are titanium sponge production important components at low cost, reduce titanium tetrachloride production cost for reducing sea
Continuous titanium cost, promotes its scale application to be of great significance.In recent years, goed deep into national supply side structural reform,
After-smithing petroleum coke price for chlorination process sharp rises, and the after-smithing petroleum coke of average titanium tetrachloride per ton is equally shared by all cost and is about
500-600 member, accounts for about the 10-15% of titanium tetrachloride production cost, causes great influence to titanium tetrachloride production cost.Simultaneously
Titanium slag smelting process generates largely with CO tail gas as main component, there is no effective resource utilization approach at present, handles
Exhaust gas needs certain cost, further raises titanium slag cost, has an adverse effect for the cost control of titanium sponge.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of electric furnace exhaust gas generated using titanium slag smelting process come generation
The resource utilization of exhaust gas is realized for the carbonaceous reducing agent in titanic chloride production process to reduce titanium tetrachloride production cost
The method for preparing titanium tetrachloride using titanium slag electric furnace tail gas.
The technical solution adopted by the present invention to solve the technical problems is: preparing four chlorinations using titanium slag electric furnace tail gas
The method of titanium includes the following steps: a, firstly, the tail gas from electric furnace obtained to titanium slag smelting process pre-processes: including dedusting,
Recovery of latent heat and cooling and desulfurization, thus the tail gas from electric furnace that obtains that treated；B, by treated, tail gas from electric furnace is mixed with chlorine
After conjunction obtains mixed gas, mixed gas is pressurized；C, it allows mixed gas and titanium slag to carry out chlorination reaction, finally obtains four
Chlorination titanium products.
Further, the method for recovery of latent heat and cooling is that ilmenite concentrate or cold conditions substance is added in step a.
Further, in step a, recovery of latent heat and temperature is reduced to range after cooling down is 15-20 DEG C.
Further, in step a, SO after desulfurization2Mass concentration is reduced to 0.01% or less.
Further, tail gas from electric furnace is mixed with chlorine according to mass ratio Cl in step b2: CO=(8-12): 1 is matched
Than.
Further, being pressurized using chlorine supercharging device to mixture pressure, pressure limit in step b are as follows:
0.15-0.18MPa。
Further, chlorination temperature is improved 5- compared to the temperature before reaction in the chlorination reaction process of step c
10℃。
Further, in the chlorination reaction process of step c, the chlorination furnace furnace top pressure range of chlorination reaction is -400~
+400Pa。
The beneficial effects of the present invention are: one, titanium slag smelting process tail gas may be implemented in titanic chloride production process
Recycling green utilization, reduce titanium tetrachloride production cost 10-15%；Two, titanium slag smelting process electric furnace can be made full use of
The latent heat of tail gas；Three, it realizes recycling for carbon, reduces greenhouse gas emission.The present invention realizes titanium slag smelting process electric furnace
The recovery of latent heat of tail gas can reduce the petroleum coke consumption of chlorination process, can avoid polluting caused by processing tail gas, have significant
Economic benefit and environmental benefit are especially suitable among the production of titanium slag smelting-titanium tetrachloride.
Detailed description of the invention
Fig. 1 flow chart of the method for the present invention.
Specific embodiment
The method for preparing titanium tetrachloride using titanium slag electric furnace tail gas includes the following steps: a, firstly, smelting to titanium slag
The tail gas from electric furnace that process obtains is pre-processed: including dedusting, recovery of latent heat and cooling and desulfurization, to obtain that treated
Tail gas from electric furnace；B, mixed gas will be pressurized after treated tail gas from electric furnace and chlorine is mixed to get mixed gas；C, it allows
Mixed gas and titanium slag carry out chlorination reaction, finally obtain titanium tetrachloride product.
The principle that the present invention designs is such.Firstly, from thermodynamics of reactions angle analysis, at 700 DEG C, CO and C with
TiO2The standard Gibbs free energy of reaction is respectively -274.3kJ/mol and -274.2kJ/mol, both can be with TiO2Reaction,
And reaction thermodynamic condition it is essentially identical, the CO in tail gas from electric furnace obtained with titanium slag smelting process replace after-smithing petroleum coke into
Row chlorination reaction is possible in theory.Secondly, the pretreatment of titanium slag smelting process tail gas from electric furnace, including recovery of latent heat, desulfurization and increasing
Pressure etc., realizes the recycling of energy, to enter chlorination furnace after allowing tail gas from electric furnace to mix in proportion with chlorine, completes chlorination
Reaction.Recovery of latent heat in titanium slag smelting process tail gas from electric furnace may be implemented in the method for the present invention, can reduce the petroleum coke of chlorination process
It consumes, can avoid polluting caused by processing tail gas, there is significant economic benefit and environmental benefit, be especially suitable for titanium slag smelting-
The integrated manufacturing enterprise of titanium tetrachloride production.The present invention improves titanium tetrachloride and subsequent production for reducing titanium tetrachloride cost
The product market competitiveness is of great significance, and market promotion prospect is wide.
As preferred scheme in step a, when carrying out recovery of latent heat and cooling down, the method for recovery of latent heat and cooling can be with
It is selected as and ilmenite concentrate or cold conditions substance is added, to realize the recycling to heat.In actual production, recovery of latent heat and cold
But temperature is reduced to range to be 15-20 DEG C and is advisable after.
In step a when desulfurization process, preferably SO after desulfurization2Mass concentration is reduced to 0.01% hereinafter, to be subsequent
Reaction provides quality guarantee.
When tail gas from electric furnace and chlorine are mixed to get mixed gas in stepb, tail gas from electric furnace mixed with chlorine preferably according to
Mass ratio Cl2: CO=(8-12): 1 is matched, to guarantee the needs of subsequent reactions.
When being pressurized in stepb to mixed gas, it is preferred to use chlorine supercharging device carries out mixture pressure
Pressurization, the pressure limit obtained after pressurization are as follows: 0.15-0.18MPa is advisable, to obtain suitable reaction effect.
In step c, for guarantee chlorination process pressure stablize it is controlled, preferably by chlorination temperature compared to reaction before
The chlorination furnace top pressure control of 5-10 DEG C of temperature raising and chlorination reaction is -400~+400Pa in range.
Embodiment
Embodiment 1
The tail gas from electric furnace that titanium slag smelting process obtains is dusted, the temperature after heating ilmenite concentrate is 30-50 DEG C, electric furnace
Tail gas main component is CO (volume fraction): 60-70%, N2: 20-25%, CO2: 8-10%, SO2: 1-2%, after desulfurization, SO2:
0.08%, temperature is 18 DEG C, and tail gas from electric furnace additional proportion is according to Cl2: CO (mass ratio)=10:1 control, chlorine and electric furnace exhaust gas
Pressure is 0.15MPa.Using fused salt chlorimation technique, using 74% grade titanium slag as raw material, chlorination temperature is 720-730 DEG C, furnace roof
Pressure -400~+400Pa.
As a result: may be implemented that stablizing for chlorination process is controlled, and tail gas from electric furnace can substitute after-smithing petroleum coke completely, preparation
Titanium tetrachloride quality is not substantially change, and titanium tetrachloride cost per ton can reduce by 527 yuan
Embodiment 2
The tail gas from electric furnace that titanium slag smelting process obtains is dusted, the temperature after heating ilmenite concentrate is 40-55 DEG C, electric furnace
Tail gas main component is CO (volume fraction): 55-65%, N2: 30-38%, CO2: 5-8%, SO2: 1-2%, after desulfurization, SO2:
0.05%, temperature is 20 DEG C, and tail gas from electric furnace additional proportion is according to Cl2: CO (mass ratio)=8:1 control, chlorine and electric furnace exhaust gas
Pressure is 0.18MPa.Using fused salt chlorimation technique, using 78% grade titanium slag as raw material, chlorination temperature is 730-735 DEG C, furnace roof
Pressure -400~+400Pa.
As a result: may be implemented that stablizing for chlorination process is controlled, and tail gas from electric furnace can substitute after-smithing petroleum coke completely, preparation
Titanium tetrachloride quality is not substantially change, and titanium tetrachloride cost per ton can reduce by 535 yuan.
Claims (8)
1. the method for preparing titanium tetrachloride using titanium slag electric furnace tail gas, which comprises the steps of:
A, firstly, the tail gas from electric furnace obtained to titanium slag smelting process pre-processes: including dedusting, recovery of latent heat and cooling and
Desulfurization, thus the tail gas from electric furnace that obtains that treated；
B, mixed gas will be pressurized after treated tail gas from electric furnace and chlorine is mixed to get mixed gas；
C, it allows mixed gas and titanium slag to carry out chlorination reaction, finally obtains titanium tetrachloride product.
2. the method for preparing titanium tetrachloride using titanium slag electric furnace tail gas as described in claim 1, it is characterised in that: step
In a, the method for recovery of latent heat and cooling is that ilmenite concentrate or cold conditions substance is added.
3. the method for preparing titanium tetrachloride using titanium slag electric furnace tail gas as claimed in claim 2, it is characterised in that: step
In a, recovery of latent heat and temperature is reduced to range after cooling down is 15-20 DEG C.
4. the method for preparing titanium tetrachloride using titanium slag electric furnace tail gas as described in claim 1, it is characterised in that: step
In a, SO after desulfurization2Mass concentration is reduced to 0.01% or less.
5. the method for preparing titanium tetrachloride using titanium slag electric furnace tail gas as described in claim 1, it is characterised in that: step
In b, tail gas from electric furnace is mixed with chlorine according to mass ratio Cl2: CO=(8-12): 1 is matched.
6. the method for preparing titanium tetrachloride using titanium slag electric furnace tail gas as claimed in claim 5, it is characterised in that: step
In b, mixture pressure is pressurized using chlorine supercharging device, pressure limit are as follows: 0.15-0.18MPa.
7. the method for preparing titanium tetrachloride using titanium slag electric furnace tail gas as described in claim 1, it is characterised in that: step
In the chlorination reaction process of c, chlorination temperature is improved 5-10 DEG C compared to the temperature before reaction.
8. the method for preparing titanium tetrachloride using titanium slag electric furnace tail gas as described in claim 1, it is characterised in that: step
In the chlorination reaction process of c, the chlorination furnace furnace top pressure range of chlorination reaction is -400~+400Pa.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811040763.3A CN109052460A (en) | 2018-09-07 | 2018-09-07 | The method for preparing titanium tetrachloride using titanium slag electric furnace tail gas |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1066043A (en) * | 1991-12-27 | 1992-11-11 | 天津化工厂 | Rutile-type titanium dioxide powder prepared by plasma chlorination process |
| CN101016167A (en) * | 2006-02-09 | 2007-08-15 | 朱作远 | Process of preparing high-purity TiCl4 by preheating chlorine gas low-temperature chlorination method |
| US20140308197A1 (en) * | 2013-04-16 | 2014-10-16 | Indra Neelameggham | Production of titanium compounds and metal by sustainable Methods |
-
2018
- 2018-09-07 CN CN201811040763.3A patent/CN109052460A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1066043A (en) * | 1991-12-27 | 1992-11-11 | 天津化工厂 | Rutile-type titanium dioxide powder prepared by plasma chlorination process |
| CN101016167A (en) * | 2006-02-09 | 2007-08-15 | 朱作远 | Process of preparing high-purity TiCl4 by preheating chlorine gas low-temperature chlorination method |
| US20140308197A1 (en) * | 2013-04-16 | 2014-10-16 | Indra Neelameggham | Production of titanium compounds and metal by sustainable Methods |
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Application publication date: 20181221 |