CN110002779A - With the method for titanium extraction tailings production slag micropowder - Google Patents
With the method for titanium extraction tailings production slag micropowder Download PDFInfo
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- CN110002779A CN110002779A CN201910411283.1A CN201910411283A CN110002779A CN 110002779 A CN110002779 A CN 110002779A CN 201910411283 A CN201910411283 A CN 201910411283A CN 110002779 A CN110002779 A CN 110002779A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/14—Waste materials; Refuse from metallurgical processes
- C04B18/141—Slags
- C04B18/144—Slags from the production of specific metals other than iron or of specific alloys, e.g. ferrochrome slags
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
- C04B40/0042—Powdery mixtures
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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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
Disclosed by the invention is a kind of method with titanium extraction tailings production slag micropowder in fixed-end forces and application technology as the second resource field, mainly first prepare liquid phase activator, then liquid phase activation is carried out to titanium extraction tailings with activator, then the titanium extraction tailings after activation are dehydrated again, are crushed, calcination processing, slag micropowder is made after finally being ground obtained tailings.The beneficial effects of the present invention are: the present invention carries out liquid phase activation to titanium extraction tailings first, it can be obtained good dechlorination decarburization effect under lower maturing temperature, it can keep the potential hydration activity of titanium extraction tailings well simultaneously, S95 grades of slag micropowder engineerings uses can be prepared after then carrying out low-temperature bake, grinding to titanium extraction tailings or sell.Dechlorination efficiency of the present invention is high, processing cost is low, treating capacity is big, process is short, the feature of environmental protection is good, energy-saving effect is good, while product has certain added value and market capacity big, is an extraordinary path of scale consumption titanium extraction tailings.
Description
Technical field
The present invention relates to fixed-end forces and application technology as the second resource fields more particularly to a kind of pair of titanium extraction tailings to carry out dechlorination
The method of carbonization treatment and resource utilization.
Background technique
Annual ten thousand tons of the titanium-containing blast furnace slag about 600-700 of discharge of certain steel enterprise, wherein content of titanium dioxide 20%-26% it
Between.Titanium extraction tailings are the residue that titanium-containing blast furnace slag is generated by high temperature cabonization-low temperature chlorination, titanium extraction tailings chemical component and slag
Cement is close, and has hydration activity, can be used as the use of the construction materials such as slag micropowder.But chlorinity is high in titanium extraction tailings
Up to 2%-4%, if used directly as cement admixture, its adding proportion will be substantially reduced；If being used as slag after grinding
Micro mist uses, then chloride ion is seriously more than the standard value of slag micropowder 0.06%.Free carbon content in titanium extraction tailings simultaneously
Up to 6%-10% substantially exceeds the standard value of slag micropowder 3%, in addition free carbon or a kind of fuel, if can efficiently use,
It can the effectively save energy.Therefore, seek chlorine and carbon in economically viable method removing titanium extraction tailings, and dechlorination will not be greatly reduced
The hydration activity of tailings can make titanium extraction tailings have the condition that slag micropowder utilizes on a large scale for preparing, and can thoroughly solve blast furnace slag
The environmentally friendly bottleneck of titanium industry is mentioned, while will also generate certain economic benefit.
It is physisorption type, main component Cl that chloride ion in titanium extraction tailings, which is primarily present form,2, there are also do not overflow on a small quantity
TiCl out4, titanium extraction tailings granularity is thinner, and wherein the tailings accounting of 100-325 mesh is more than 75%, so tailings adsorption
Cl2Part can be removed by low-temperature bake, but in tailing particles hole and TiC be chlorinated after in the hole that is formed
Cl2And TiCl4It can not remove, unless titanium extraction tailings high temperature is roasted so that tailing glass phase structure is thoroughly destroyed, then hole
In Cl2And TiCl4It overflows to shed and, to reach the target of < 0.06%.But the dechlorination mode of this high-temperature process, though chlorine
So reach the use standard requirements of concrete, slag micropowder etc., but the glass phase structure due to mainly playing hydration activity is substantially
Destruction causes the hydration activity of dechlorination tailings almost to disappear, and economy and the market space are poor.
At present to the processing of titanium extraction tailings and by have it is following some in the way of: a kind of (application of the processing method of titanium extraction tailings
Number CN201310288715.7), the non-pollution processing method and system (application number of a kind of chloridising titanium extraction tailings
CN201410148402.6), the dechlorination methods (application number CN201410279998.3) of titanium extraction tailings, chlorine method titanium extraction tailings are removed
Chlorine method (application number CN201510794556.7).Although having carried out a series of titanium extraction tailings washing dechlorination research before,
Dechlorination is not thorough, and cost for wastewater treatment is high, and process flow is longer, and treating capacity is restricted, and additional step is needed to carry out carbon
Removing is not able to satisfy the energy conservation and environmental protection requirement that country advocates.High-titanium blast furnace slag Deep utilizes and production demonstration
It is the project of current state key research and development programme support, the outlet of only solution titanium extraction tailings could thoroughly solve high titania type blast furnace
Slag mentions the environmentally friendly bottleneck of the full industrial chain of titanium industryization.
Summary of the invention
To overcome existing titanium extraction tailings above shortcomings during processing and utilization, skill to be solved by this invention
Art problem is: providing a kind of titanium tail washings that mentions and mutually activates the-low-temperature bake dechlorination decarburization method for preparing slag micropowder.
The technical solution adopted by the present invention to solve the technical problems is:
With the method for titanium extraction tailings production slag micropowder, comprising the following steps:
A, the preparation of liquid phase activator: take the appropriate solution with compared with strong reducing property ion as liquid phase activator；
B, titanium extraction tailings liquid phase activates: a certain proportion of titanium extraction tailings being poured into liquid phase activator soln, are stirred to react
Certain time sufficiently activates titanium extraction tailings；
C, titanium extraction tailings are dehydrated: the titanium extraction tailings slurry after activation being squeezed into dehydration equipment and is sufficiently dehydrated；
D, titanium extraction tailings are broken: abundant dewatered titanium extraction tailings are broken into the small bulk of partial size < 0.5cm；
E, it calcines: broken titanium extraction tailings being put into High-temp. kiln and calcine certain time, calcination temperature≤700 DEG C,
And isothermal holding；
F, tailings is handled: slag micropowder is made in calcined titanium extraction tailings after grinding.
Further, the liquid phase activator matching while using, using the solid activator and work for having reproducibility ion
The new water of industry is mixed in a certain ratio rear stirring and dissolving and is uniformly made.
Further, the solid activator is ammonium sulfate, ferrous sulfate, sodium sulphate, sodium sulfite, oxalic acid, carbonic acid
One or more of hydrogen ammonium, ammonium nitrate, matching the solution concentration that postpones with industrial fresh water is 5%-25%, activator soln with mention
It is 1.2:1-3.0:1 that the liquid of titanium tailings reaction, which consolidates mass ratio,.
Further, the solid activator is ferrous sulfate or ammonium sulfate, it is dense that the solution postponed is matched with industrial fresh water
Degree is 7%-15%, and it is 1.5:1-2.0:1 that the liquid that activator soln is reacted with titanium extraction tailings, which consolidates mass ratio,.
Further, using plate and frame filter press or vertical type blotter press when being dehydrated in step c to titanium extraction tailings.
Further, new liquid phase can be made solid activator is wherein added in the solution obtained after dehydration
Liquid phase of the activator for titanium extraction tailings activates, and recycles repeatedly.
Further, when being calcined in step e to titanium extraction tailings after broken, calcination temperature control 500 DEG C-
800 DEG C, calcination time 20min-150min.
Further, the calcination temperature is 600 DEG C -700 DEG C, calcination time 30min-120min.
Further, the flue gas that calcining generates obtains metal chloride and tail gas, metal chloride using processing of gathering dust
Recoverable, tail gas discharge after spray-absorption is handled.
Further, tailings passes through ball mill grinding, specific surface area >=300m after grinding after calcining in step f2/kg。
The beneficial effects of the present invention are: the present invention carries out liquid phase activation to titanium extraction tailings first, in lower maturing temperature
Under can be obtained good dechlorination decarburization effect, while the potential hydration activity of titanium extraction tailings can be kept well, then to mentioning
Titanium tailings can prepare S95 grades of slag micropowder engineerings uses after carrying out low-temperature bake, grinding or sell.Dechlorination efficiency of the present invention
It is high, processing cost is low, treating capacity is big, process is short, the feature of environmental protection is good, energy-saving effect is good, while product have certain added value and
Market capacity is big, is an extraordinary path of scale consumption titanium extraction tailings.
Detailed description of the invention
Fig. 1 is flow diagram of the present invention.
Specific embodiment
The following further describes the present invention with reference to the drawings, and entire preparation flow is as shown in Figure 1.
With the method for titanium extraction tailings production slag micropowder, comprising the following steps:
A, the preparation of liquid phase activator: take the appropriate solution with reproducibility ion as liquid phase activator；
B, titanium extraction tailings liquid phase activates: a certain proportion of titanium extraction tailings being poured into liquid phase activator soln, are stirred to react
Certain time sufficiently activates titanium extraction tailings；
C, titanium extraction tailings are dehydrated: the titanium extraction tailings slurry after activation being squeezed into dehydration equipment and is sufficiently dehydrated；
D, titanium extraction tailings are broken: abundant dewatered titanium extraction tailings are broken into the small bulk of partial size < 0.5cm；
E, it calcines: broken titanium extraction tailings being put into High-temp. kiln and calcine certain time, calcination temperature≤700 DEG C,
And isothermal holding；
F, tailings is handled: slag micropowder is made in calcined titanium extraction tailings after grinding.
The titanium extraction tailings are titanium-containing blast furnace slag resulting tailings after the processing of high temperature cabonization-low temperature chlorination, mainly at
It is divided into: CaO 15%-30%, MgO 6%-15%, SiO220%-30%, TiO26%-10%, Al2O38%-15%, trip
From carbon 5%-12%, chlorine 2%-6%.Chlorine is mainly present in titanium extraction tailings nanoscale in a manner of physical absorption in titanium extraction tailings
In pit-hole, main cause is that titanium tetrachloride enters gas phase in gaseous form and purified during mentioning titanium, the tailings left with
A large amount of spillings of titanium tetrachloride, the position of original titanium elements forms a large amount of pit-hole and gap, can by adding water washing
So that most of chlorine is entered liquid phase in the form of an ion and is separated, but repeatedly still has 0.2% or more chlorine residual in titanium extraction tailings after washing
It stays in tailings, main cause is that the position that titanium elements are chlorinated after foring titanium tetrachloride gases spilling forms a large amount of hole
Hole and gap cause a large amount of chlorine element to be trapped in these pit-holes and gap, and gas molecule can enter, but hydrone without
Method, which enters, touches chlorine, so repeatedly still having the chlorine of 0.2%-0.3% to remain in tailings after washing.
The liquid phase activator that the present invention uses has reproducibility ion, has reproducibility, and titanium extraction tailings are activated by liquid phase
Afterwards, it is not only activated the chlorine for being adsorbed in titanium extraction tailings surface, generates a kind of much 700 DEG C of < of boiling point of chloride ,≤
It can be removed easily at a temperature of 700 DEG C of oxidizing roasting, while as overflowing for surface chlorination object dissipates, under the action of dynamics, hole
Chlorine inside hole, which will constantly overflow to shed, to be come, and the chlorine in hole is also removed quickly, thus realize the dechlorination of titanium extraction tailings,
Chloride ion in titanium extraction tailings can be removed to 0.06% or less.The free carbon of the 5%-12% contained in titanium extraction tailings is in low temperature
It can burn when roasting, necessary heat source can be provided for calcining, be a kind of preferable titanium extraction tailings processing of energy saving and resource utilization
Free carbon in titanium extraction tailings can be reduced to 1% hereinafter, the removing of carbon also reduces the scaling loss of slag micropowder by mode after roasting
To meet requirements of the national standard.
Titanium extraction tailings can be such that its chlorinity is reduced to 0.06% hereinafter, free carbon contains after the method for the invention is handled
Amount is reduced to the disperse in tailings 0.5% hereinafter, keep in titanium extraction tailings mineral phase structure 85% or more glass phase structure simultaneously
TiC it is also not oxidized, meet requirement of the slag micropowder to chloride ion content and scaling loss, by calcined tailings pass through ball mill
Grinding is at specific surface area >=400m2The powder of/kg can serve as S95 grades of slag micropowders and sell or use, and realizes and mentions titanium tail
The purpose that slag is used as slag micropowder megaton scale.
Compared with existing method, activation titanium extraction tailings, which have, plays dechlorination decarburization in the case where the short period is compared with deep bed sintering
Effect, compares titanium extraction tailings original slag, and dechlorination efficiency greatly improves.In addition, the present invention also has, dechlorination is thorough, dechlorination is at low cost,
Zero discharge, fume treatment be at low cost, the free of losses of dechlorination tailings activity, titanium carbide is not oxidized in dechlorination tailings, after dechlorination
Product has both the advantages that market space and economy, and this method is a kind of dechlorination treatment process for having both the feature of environmental protection and economy,
All has the condition of industrialization in terms of the feature of environmental protection and economy.
In order to guarantee the chemical activity of liquid phase activator, preferably matching while using, consolidating with reproducibility ion can be used
Body activator is mixed in a certain ratio rear stirring and dissolving with industrial fresh water and is uniformly made.Sulfuric acid can be used in the solid activator
One or more of ammonium, ferrous sulfate, sodium sulphate, sodium sulfite, oxalic acid, ammonium hydrogen carbonate, ammonium nitrate.It is ground according to many experiments
Study carefully, the solid activator and industrial fresh water are configured to the solution that concentration is 5%-25% and are easy preparation, by the activator soln
When consolidating mass ratio 1.2:1-3.0:1 according to liquid with titanium extraction tailings and being reacted, the chloride ion in titanium extraction tailings can be sufficiently activated, is adopted
There is optimal cost performance with the collocation form, reduce production cost.
Wherein, Preferable scheme is that, solid activator uses ferrous sulfate, because the raw material is the discarded production of many industries
Object, use cost is low, and activation effect is good.When specifically used, it is 7%-15%, activation that the solution concentration postponed is matched with industrial fresh water
It is 1.5:1-2.0:1 that the liquid that agent solution is reacted with titanium extraction tailings, which consolidates mass ratio,.
Preferably with plate and frame filter press or vertical type blotter press when being dehydrated in step c to titanium extraction tailings, it is particularly suitable for
The dehydration of titanium extraction tailings and be conducive to be engineered.
For obtained useless reaction solution after dehydration, due to enter the residual of useless reaction solution after titanium extraction tailings liquid phase activating reaction
It stays the activating reaction of ion pair next time to have no adverse effect, after adding solid activator wherein, can be recycled infinitely,
The operation such as filter-press dehydration of dechlorination effect and filter cake is not influenced, so as to realize the zero-emission of waste water.
When calcining in step e to broken rear titanium extraction tailings, calcination temperature should be controlled at 500 DEG C -800 DEG C, calcining
Time is 20min-150min.Wherein Preferable scheme is that, the calcination temperature is 600 DEG C -700 DEG C, and calcination time is
30min-120min.The temperature and calcining time not only can guarantee the removal efficiency of chloride and carbon in titanium extraction tailings, but also make to mention
The glass state material of titanium tailings itself can preferably retain.
Chlorine is far below 700 DEG C of chlorine mainly in the tail gas containing chlorine generated when calcining to titanium extraction tailings with a kind of boiling point
Compound exists, and by gathering dust, equipment can be recycled, and substantially reduce the cost of smoke gas treatment, while can also recycle a kind of chlorination
Object, remaining a small amount of tail gas can be discharged after spray-absorption is handled, not polluted the environment, energy conservation and environmental protection.
Be described further below by several embodiment and comparative examples, in embodiment titanium extraction tailings primary chemical used at
Divide as shown in table 1, its hydration activity index of laboratory testing is about 105%.
1 titanium extraction tailings main chemical compositions of table
| Component | CaO | MgO | SiO2 | TiO2 | Al2O3 | Cl |
| Content % | 26.5 | 8.78 | 25.3 | 7.77 | 13.0 | 3.28 |
Embodiment 1
With chlorine and carbon in technical solution of the present invention removing titanium extraction tailings, tailings is prepared into slag by grinding after dechlorination decarburization
Micro mist.
It comprises the concrete steps that:
Above-mentioned titanium extraction tailings are mixed for 1.8:1 with 15% activator soln with liquid-solid ratio, are stirred to react 10min, into
Enter vertical type blotter press filters pressing, obtain filter cake, filter cake is broken into the fritter of particle < 5mm, is placed in reactor, is put into 700 DEG C of horses
Not in furnace, slightly blow-on door, holding cross-ventilation calcine 60min, take out cooling, and the titanium extraction tailings chlorinity after roasting is reduced to
< 0.05%, carbon < 0.5%, by the titanium extraction tailings after roasting on planetary ball mill grinding to specific surface area > 400m2/ kg,
Its 28 days activity indexs are 97%, can substitute S95 grades of slag micropowders and use or sell.
Embodiment 2
With chlorine and carbon in technical solution of the present invention removing titanium extraction tailings, tailings is prepared into slag by grinding after dechlorination decarburization
Micro mist.
It comprises the concrete steps that:
Above-mentioned titanium extraction tailings are mixed for 1.8:1 with 10% activator soln with liquid-solid ratio, are stirred to react 10min, into
Enter plate and frame filter press filters pressing, obtain filter cake, filter cake is broken into the fritter of particle < 5mm, is placed in reactor, is put into 700 DEG C of horses
Not in furnace, slightly blow-on door, holding cross-ventilation calcine 90min, take out cooling, be denoted as sample 1.It will be useless after first step filters pressing
Reaction solution is 6% addition solid activator in useless reaction solution with mass ratio, then fills into a certain amount of new water, mentions titanium for above-mentioned
Tailings is that 1.8:1 is mixed with 10% activator soln with liquid-solid ratio, is stirred to react 10min, into plate and frame filter press filters pressing, obtains
To filter cake, filter cake is broken into the fritter of particle < 5mm, is placed in reactor, is put into 700 DEG C of Muffle furnaces, slightly blow-on door, keeps
Cross-ventilation calcines 90min, takes out cooling, is denoted as sample 2；By the useless reaction solution after second step filters pressing, with mass ratio for 6%
Solid activator is added in useless reaction solution, then fills into a certain amount of new water, by above-mentioned titanium extraction tailings with liquid-solid ratio be 1.8:1 with
10% activator soln mixing, is stirred to react 10min, into plate and frame filter press filters pressing, obtains filter cake, filter cake is broken into particle
The fritter of < 5mm, is placed in reactor, is put into 700 DEG C of Muffle furnaces, slightly blow-on door, keeps cross-ventilation, calcines 90min, takes
It cools down out, is denoted as sample 3；It so repeats 50 times, is denoted as the 4~50, the 1st to No. 50 sample chlorinity all < 0.05% of sample, carbon
< 0.5%.By the 1st, 10,20,30,40, No. 50 sample respectively on planetary ball mill grinding to specific surface area > 400m2/ kg,
The equal > 95% of 28 days activity indexs can substitute S95 grades of slag micropowders and use or sell.Useless reaction solution is recycled 50 times still not
Influence dechlorination decarburization effect.
Embodiment 3
With chlorine and carbon in technical solution of the present invention removing titanium extraction tailings, tailings is prepared into slag by grinding after dechlorination decarburization
Micro mist.
It comprises the concrete steps that:
Above-mentioned titanium extraction tailings are mixed for 1.8:1 with 15% activator soln with liquid-solid ratio, are stirred to react 10min, into
Enter vertical type blotter press filters pressing, obtain filter cake, filter cake is broken into the fritter of particle < 5mm, is placed in reactor, is put into 700 DEG C of horses
Not in furnace, 120min is calcined, tail gas concentration after roasting can be discharged into outside furnace by reactor with a long metal tube, the outer temperature of furnace
50 DEG C of <, after calcining, long metal tube tube wall is condensed into analyte detection, main component is a kind of metal chloride, then calcining
Process tail gas containing chlorine can be used and reduce the mode gathered dust and be recycled, and processing cost is low and recyclable chloride.After roasting
Titanium extraction tailings chlorinity is reduced to < 0.05%, carbon < 0.5%, and by the titanium extraction tailings after roasting, grinding is extremely on planetary ball mill
Specific surface area > 400m2/ kg, 28 days activity indexs are 96%, can substitute S95 grades of slag micropowders and use or sell.
Comparative example 4
With chlorine in other methods removing titanium extraction tailings, tailings is prepared into slag micropowder by grinding after dechlorination.
Laboratory handles titanium extraction tailings using multi-stage water wash, adds water and stirs washing titanium extraction tailings 20min by liquid-solid ratio 1:1,
Washing titanium extraction tailings 20min is added water and stirred by liquid-solid ratio 1:1 again after filtering, after 8 washings, chlorinity is in titanium extraction tailings
0.30%, chlorinity is unable to reach the chlorine standard (< 0.06%) of slag micropowder, can not be as the raw material for preparing slag micropowder.
Comparative example 5
With chlorine in other methods removing titanium extraction tailings, tailings is prepared into slag micropowder by grinding after dechlorination.
Above-mentioned titanium extraction tailings are placed in reactor, are put into 1000 DEG C of Muffle furnaces, slightly blow-on door, keep cross-ventilation,
120min is calcined, cooling is taken out, the titanium extraction tailings chlorinity after roasting is reduced to 0.028%, the titanium extraction tailings after roasting are existed
Grinding is to specific surface area > 400m on planetary ball mill2/ kg, 28 days activity indexs of tailings are 47%, and activity index is too low, can not
The minimum requirements (>=75%) for reaching slag micropowder, cannot function as the raw material for preparing slag micropowder.
Titanium extraction tailings are handled with technical solution of the present invention it can be seen from embodiment and comparative example, in lower roasting temperature
It can be obtained more preferably dechlorination decarburization effect under degree, while the potential hydration activity of titanium extraction tailings can be kept well, while whole
The useless reaction solution of a process can be recycled infinitely, i.e. wastewater zero discharge, and in addition fume treatment containing chlorine is at low cost, passes through cooling
It gathers dust i.e. recyclable, and the main component of tail gas containing chlorine that titanium extraction tailings dinectly bruning generates is chlorine and hydrogen chloride, needs to consume
Lye absorbs, and processing cost is high but also will generate a large amount of chlorine-contained wastewaters and can not handle.By liquid phase activation-low-temperature reinforcement roasting
Titanium extraction tailings after burning can achieve the Active pharmaceutical for preparing slag micropowder, and finished product passes through grinding after roasting, can prepare S95
Grade slag micropowder engineering is used or is sold.Dechlorination efficiency of the present invention is high, processing cost is low, treating capacity is big, process is short, the feature of environmental protection
Well, energy-saving effect is good, while product has certain added value and market capacity big, is that one of consumption titanium extraction tailings is very good
Path.
Claims (10)
1. with the method for titanium extraction tailings production slag micropowder, characterized in that the following steps are included:
A, the preparation of liquid phase activator: take the appropriate solution with compared with strong reducing property ion as liquid phase activator；
B, titanium extraction tailings liquid phase activates: a certain proportion of titanium extraction tailings being poured into liquid phase activator soln, are stirred to react certain
Time sufficiently activates titanium extraction tailings；
C, titanium extraction tailings are dehydrated: the titanium extraction tailings slurry after activation being squeezed into dehydration equipment and is sufficiently dehydrated；
D, titanium extraction tailings are broken: abundant dewatered titanium extraction tailings are broken into the small bulk of partial size < 0.5cm；
E, it calcines: broken titanium extraction tailings being put into High-temp. kiln and calcine certain time, calcination temperature≤700 DEG C, and protect
Temperature processing；
F, tailings is handled: slag micropowder is made in calcined titanium extraction tailings after grinding.
2. the method for producing slag micropowder with titanium extraction tailings as described in claim 1, it is characterized in that: the liquid phase activator is existing
With now matching, rear stirring and dissolving is mixed in a certain ratio with industrial fresh water using the solid activator with reproducibility ion and is uniformly made
?.
3. the method for producing slag micropowder with titanium extraction tailings as claimed in claim 2, it is characterized in that: the solid activator is
One or more of ammonium sulfate, ferrous sulfate, sodium sulphate, sodium sulfite, oxalic acid, ammonium hydrogen carbonate, ammonium nitrate, with industrial fresh water
It is 5%-25% with the solution concentration postponed, it is 1.2:1-3.0:1 that the liquid that activator soln is reacted with titanium extraction tailings, which consolidates mass ratio,.
4. the method for producing slag micropowder with titanium extraction tailings as claimed in claim 3, it is characterized in that: the solid activator is
Ferrous sulfate or ammonium sulfate, it is 7%-15% that the solution concentration postponed is matched with industrial fresh water, and activator soln is anti-with titanium extraction tailings
It is 1.5:1-2.0:1 that the liquid answered, which consolidates mass ratio,.
5. as described in claim 1 with the method for titanium extraction tailings production slag micropowder, it is characterized in that: to mentioning titanium tail in step c
Plate and frame filter press or vertical type blotter press are used when slag is dehydrated.
6. the method with titanium extraction tailings production slag micropowder as described in claim 2~4 any one claim, feature
Be: new liquid phase activator can be made for mentioning titanium tail solid activator is wherein added in the solution obtained after dehydration
The liquid phase of slag activates, and recycles repeatedly.
7. the method for producing slag micropowder with titanium extraction tailings as described in claim 1, it is characterized in that: to broken in step e
When titanium extraction tailings are calcined afterwards, calcination temperature control is at 500 DEG C -800 DEG C, calcination time 20min-150min.
8. the method for producing slag micropowder with titanium extraction tailings as claimed in claim 7, it is characterized in that: the calcination temperature is
600 DEG C -700 DEG C, calcination time 30min-120min.
9. being adopted as described in claim 1 with the method for titanium extraction tailings production slag micropowder it is characterized in that: calcining the flue gas generated
With processing of gathering dust, metal chloride and tail gas, metal chloride recoverable are obtained, tail gas handles heel row by spray-absorption
It puts.
10. the method for producing slag micropowder with titanium extraction tailings as described in claim 1, it is characterized in that: calcining rear molding in step f
Slag passes through ball mill grinding, specific surface area >=300m after grinding2/kg。
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