CN107445192A - The recoverying and utilizing method and its equipment of titanium powder plant discarded object GYPSUM RUBRUM - Google Patents
The recoverying and utilizing method and its equipment of titanium powder plant discarded object GYPSUM RUBRUM Download PDFInfo
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- CN107445192A CN107445192A CN201710605931.8A CN201710605931A CN107445192A CN 107445192 A CN107445192 A CN 107445192A CN 201710605931 A CN201710605931 A CN 201710605931A CN 107445192 A CN107445192 A CN 107445192A
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- gypsum rubrum
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/46—Sulfates
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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
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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
- C04B11/00—Calcium sulfate cements
- C04B11/02—Methods and apparatus for dehydrating gypsum
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- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention belongs to the technical field of the disposal of three wastes and comprehensive utilization, more particularly to a kind of recoverying and utilizing method and its equipment of titanium powder plant discarded object GYPSUM RUBRUM, this method using caused acid waste water during Titanium White Production By Sulfuric Acid Process to being handled, reclaim GYPSUM RUBRUM, by using drying process with atomizing, the free water content in discarded object GYPSUM RUBRUM is set to drop to less than 15% by original 30 90%, effectively reduce the free water content of GYPSUM RUBRUM, meet that the raw material in cement plant enters the requirement of factory, and its granule size is uniform.The recoverying and utilizing method of titanium powder plant discarded object GYPSUM RUBRUM of the present invention; discarded object GYPSUM RUBRUM can be made to turn waste into wealth; meet the theory of Green Chemistry; reach the purpose for economizing on resources and comprehensively utilizing; meet country proposition walk to economize on resources; the industrial policy for the sustainable development path that environmental protection is mutually coordinated, there is stronger economic benefit and social benefit.
Description
Technical field
The invention belongs to the technical field of the disposal of three wastes and comprehensive utilization, and in particular to a kind of red stone of titanium powder plant discarded object
The recoverying and utilizing method and its equipment of cream.
Background technology
GYPSUM RUBRUM is when using Titanium White Production By Sulfuric Acid Process, to administer acid waste water, adds lime（Or carbide slag）In
It is the main work of sulfuric acid method titanium pigment with substantial amounts of acid waste water and the caused industrial residue using dihydrate gypsum as main component
Industry discarded object.Relative to desulfurated plaster and ardealite, GYPSUM RUBRUM does not have the attention for causing society enough.But in sulfuric acid process titanium
In white powder production process, the GYPSUM RUBRUM that trade waste is thrown away is taken as, is that one kind is widely used in cement, ceramics, stone in fact
The raw material of the building material industries such as cream product, GYPSUM RUBRUM largely produces in production process, although itself does not endanger.In reality
In production process, the processing of GYPSUM RUBRUM is typically that it is 25-35% to obtain free water moisture after it is pressed dry using filter press,
Plastochondria is uneven, and the very high byproduct of stickiness, byproduct, which is added among clinker, can form one layer of mucous membrane, basic to rise not
To the effect of coagulator, because being applied to as a kind of coagulator among clinker, the raw material in cement plant enters factory and requires free
Water moisture have to be lower than less than 15%, and the GYPSUM RUBRUM that drying mode as using obtains is typically as discarded object heap
Product is got up, both waste of resource, can take substantial amounts of soil again, and its acid property can cause the soil of surrounding also to become acid
Property, and acid soil can accelerate the primary and secondary mineral weathering containing aluminium in soil and discharge substantial amounts of aluminium ion, formed and planted
The absorbable form aluminide of thing, plant can be poisoned with excessive absorption aluminium for a long time, or even dead.Therefore company is every year in red stone
Cost in the improvement of cream is nor a peanut.
In order to solve the above problems, people have studied the recoverying and utilizing method of titanium powder plant GYPSUM RUBRUM, existing disclosed text
The recoverying and utilizing method for also reporting titanium powder plant GYPSUM RUBRUM is offered, such as：
1st, application number：201210153155.X；Applicant：Chinese Academy Of Sciences Process Engineering Research Institute；Denomination of invention：A kind of titanium white
The method of powder factory sulfuric acid process output GYPSUM RUBRUM recycling；Summary：The invention provides a kind of titanium powder plant sulfuric acid process work
The method of skill output GYPSUM RUBRUM recycling, it is characterised in that be used as original by the use of titanium powder plant sulfuric acid process output GYPSUM RUBRUM
Material, with reference to Modifying Magnesium Oxychloride Cement, prepares materials for wall；Gelling and high-strength characteristic using magnesium chloride cement, add red stone
Cream is modified, and realizes the recycling of GYPSUM RUBRUM, eliminates environment hidden danger；GYPSUM RUBRUM main component is calcium sulphate dihydrate, in addition, its
The content of the impurity such as iron, aluminium, silicon is higher, is added to the compactness that product can be improved when prepared by magnesia oxychloride cement, and then increase system
The wearability and intensity of product；Obtain preferable water-resistance effect；Wall is prepared using titanium powder plant sulfuric acid process output GYPSUM RUBRUM
Body material, intervened without strong acid and strong base, normal temperature and pressure is less demanding to equipment material, and raw material availability is high, technological process letter
It is single, it is the method for a new GYPSUM RUBRUM recycling.
2nd, application number：201310289217.4；Applicant：Sichuan University；Denomination of invention：Titanium White Production By Sulfuric Acid Process is given up
The recoverying and utilizing method of slag and Waste Sulfuric Acid；Summary：The invention is related to caused waste residue in Titanium White Production By Sulfuric Acid Process technique and given up
The recoverying and utilizing method of acid, belongs to multipurpose use of the three wastes field.The technical problems to be solved by the invention are to provide a kind of sulfuric acid
The recoverying and utilizing method of caused waste residue and spent acid in method production titanium white powder craft.In the invention Titanium White Production By Sulfuric Acid Process technique
The recoverying and utilizing method of caused waste residue and spent acid, is comprised the following steps that：Ferrous sulfate in titanium dioxide waste residue is oxidized to sulfuric acid
Iron；Then plus reducing agent, ferric sulfate reduction decomposition is the oxide slag charge and sulfur dioxide gas of iron, the sulfur dioxide that will be obtained
The hydrolysis procedure in sulfuric acid return titanium white production technique is made in gas, and the oxide slag charge that will decompose obtained iron returns to oxidation
Ferric sulfate is made in reactor, then carries out reduction decomposition reaction, such circulate operation.The oxide slag charge of remaining iron is as steel-making
Factory and the raw material of production iron oxide pigment.
3rd, application number：201110262602.0；Applicant：Sichuan University；Denomination of invention：The three of Titanium White Production By Sulfuric Acid Process
Useless recoverying and utilizing method；Summary：The disclosure of the invention three wastes recoverying and utilizing method of Titanium White Production By Sulfuric Acid Process.Being characterized in will
Titanium dioxide waste residue green vitriol sloughs the crystallization water, with reducing agent under weak oxygen gas mixture atmosphere and high temperature, by anhydrous titanium dioxide waste residue reduction decomposition
For ferrous oxide residue and sulfur dioxide gas, the acidolysis in sulfuric acid return titanium white production technique is made with sulfur dioxide gas
Process, the Waste Sulfuric Acid of 10~25wt% caused by the direct neutralisation treatment titanium white production technique of ferrous oxide of decomposition are more
Remaining ferrous oxide residue can be as steel mill and the raw material of production iron oxide pigment；Titanium dioxide waste residue GYPSUM RUBRUM is sloughed into crystallization
Water, semi-hydrated gypsum is obtained, under weak oxide mixed atmosphere and high temperature be that calcium oxide is residual by semi-hydrated gypsum reduction decomposition with reducing agent
Slag and sulfur dioxide gas, sulfur dioxide gas can Sulphuric acid, by the waste water of iron content and 0.1~10% Waste Sulfuric Acid calcium oxide
Residue or quick lime neutralisation treatment, are filtrated to get the GYPSUM RUBRUM of iron content, and filtrate can reuse.
In three patent documents disclosed above, patent document 1 is by GYPSUM RUBRUM combination Modifying Magnesium Oxychloride Cement, prepares wall
Body material；And patent document 2 is to utilize redox reaction, the ferrous sulfate in titanium dioxide waste residue is oxidized to ferric sulfate；Sulfuric acid
Iron restores the oxide slag charge and sulfur dioxide gas for being decomposed into iron, and obtained sulfur dioxide gas is made into sulfuric acid returns to titanium
Hydrolysis procedure in white powder production technology, the oxide slag charge for decomposing obtained iron is returned into oxidizing reactor ferric sulfate is made,
Reduction decomposition reaction, such circulate operation are carried out again；Patent 3 is as the principle of patent 2, also with redox reaction,
Titanium dioxide waste residue green vitriol is sloughed into the crystallization water, with reducing agent under weak oxide mixed atmosphere and high temperature, anhydrous titanium dioxide waste residue reduced
Iron oxide residue and sulfur dioxide gas are decomposed into, the sulfuric acid made from sulfur dioxide gas is returned in titanium white production technique
Hydrolysis procedure, 10~25wt%'s caused by the direct neutralisation treatment titanium white production technique of ferrous oxide residue of decomposition
Waste Sulfuric Acid, unnecessary ferrous oxide residue can be as steel mills and the raw material of production iron oxide pigment.But through the present inventor
Research finds that the recycling of patent 2 disclosed above and the GYPSUM RUBRUM in patent 3 must add Oxidizing and Reducing Agents progress
Processing, production process is complex, and also needs strictly to control its addition, otherwise can increase chemical examination to a certain extent
Agent, made troubles to subsequent treatment.Therefore, a kind of simple efficient processing method is studied to return the GYPSUM RUBRUM of titanium powder plant
Receive and suffer from important meaning using the utilization to resource and the protection of environment.
The content of the invention
, should it is an object of the invention to provide a kind of recoverying and utilizing method of simple efficient titanium powder plant discarded object GYPSUM RUBRUM
Method using caused acid waste water during Titanium White Production By Sulfuric Acid Process to being handled, recovery GYPSUM RUBRUM, by using
Drying process with atomizing, the free water content in discarded object GYPSUM RUBRUM is dropped to less than 15% by original 30-90%, effectively reduce
The free water content of GYPSUM RUBRUM, meets that the raw material in cement plant enters the requirement of factory, and its granule size is uniform.Using the titanium white
The recoverying and utilizing method of powder factory discarded object GYPSUM RUBRUM, can make discarded object GYPSUM RUBRUM turn waste into wealth, and reach and economize on resources and integrate profit
Purpose.
In order to achieve the above object, the present invention adopts the following technical scheme that：
A kind of recoverying and utilizing method of titanium powder plant discarded object GYPSUM RUBRUM, to being produced using during Titanium White Production By Sulfuric Acid Process
Acid waste water handled, reclaim GYPSUM RUBRUM；Specifically comprise the following steps：
（1）During Titanium White Production By Sulfuric Acid Process, by isolated sulfuric acid after ilmenite and concentrated sulfuric acid progress acidolysis reaction
Oxygen titanium, titanyl sulfate generates metatitanic acid through hydrolysis, then after press filtration, obtains solid-state metatitanic acid and acid waste water；
（2）The lime stone of 50-250 mesh is added in acid waste water, the pH value for neutralizing solution is 3-4, adds limewash neutralization
Solution is extracted into thickening pond to 6-9, standing separation, obtains sludge slurry and sewage by the pH value of solution with pump；
（3）Sewage through after the assay was approved directly discharge discharge or reuse, with pump by the sludge slurry of thickening pond bottom be extracted into sludge from
In scheming, in the presence of centrifuge, the free water in sludge slurry separates again；
（4）Then by the sludge slurry for removing most of free water with being pumped into surge tank, the free water weight in conditioning of mud slurry
It is 30%~90% to measure content, and sludge pulp density is 1.05~1.60g/cm3；Flow velocity viscosity meter is 5~50 seconds：
（5）Slurry is extracted into spray drying tower with plunger pump after sizing mixing, is injected to through spray gun in tower, is sprayed at 800~1000 DEG C
Mist, which is dried, obtains even particle size for 1~3 second, and free water moisture weight content is less than 15% GYPSUM RUBRUM, obtained red stone
Cream is discharged from the bottom of towe discharging opening of spray drying tower.
The recoverying and utilizing method of above-mentioned titanium powder plant discarded object GYPSUM RUBRUM, step（1）Detailed step it is as follows：
A, ilmenite acidolysis：The ilmenite returned from mining site purchase is put into reactor, and it is 98% to add mass concentration
The concentrated sulfuric acid, water initiation reaction is added, obtains product；Cooling, filters out dust, ore, obtains titanium liquid；
B, titanium liquid freezing separation：Titanium liquid is put into vacuum refrigeration centrifuge, then adjusts the vacuum of vacuum refrigeration seperator,
Ferrous sulfate crystallization, centrifuge, obtain ferrous sulfate heptahydrate crystalline solid and titanyl sulfate；
C, titanyl sulfate hydrolyzes：Titanyl sulfate is imported into hydrolytic tank by pipeline, boiled under 102-107 DEG C of hydrolysis temperature
Rise, liquid metatitanic acid is made；
D, liquid metatitanic acid press filtration：Obtained liquid metatitanic acid in step C is subjected to press filtration repeatedly using filter press, obtains solid-state
Metatitanic acid and spent acid waste water.
The recoverying and utilizing method of described titanium powder plant discarded object GYPSUM RUBRUM, used equipment, including chain grate furnace and spray
Mist drying tower；Described chain grate furnace is connected by the top of warm-air pipe and spray drying tower, and described spray drying tower tower height is
28-35 rice, spray drying tower top are cylinders, and internal diameter is 10-12 rice, and tower bottom is in cone, the top of spray drying tower
Air devider, tower body middle part are installed（Typically at bottom of towe 14-16 rice）30-60 branch spray guns uniformly are installed, apart from tower
One dehumidifier pipe is housed, spray drying tower bottom is provided with discharging opening, and the outer wall of spray drying tower is provided with one layer of heat preservation at the 8-9 rice of bottom
Layer（Thickness is generally 14-17cm）, heat-insulation layer is from outside to inside steel tank, heat-preservation cotton, steel tank, and the thickness of wherein heat-preservation cotton is generally
9-12cm。
In the present invention, tower of the caused hot blast after cyclone dust removal by warm-air pipe from spray drying tower in chain grate furnace
Top is entered in spray drying tower, and air devider of the hot blast by spray drying column overhead uniformly enters the tower of spray drying tower
It is interior, the temperature in tower is reached 800~1000 DEG C, slurry is extracted into spray drying tower by the slurry after sizing mixing with plunger pump, through spray
Rifle is injected in tower, and material is formed vaporific particulate and directly contacted with the hot-air in tower by spray gun, moisture flash evapn, 1
Obtain even particle size in~3 seconds, free water moisture weight content is less than 15% GYPSUM RUBRUM, obtained GYPSUM RUBRUM from
The bottom of towe discharging opening discharge of spray drying tower, and the gas after part cools down is extracted by the dehumidifier pipe of drying tower tower bottom.
Compared with prior art, beneficial effects of the present invention are：
1st, before not improving, the processing of GYPSUM RUBRUM is typically that obtaining free water moisture is after it is pressed dry using filter press
30-90%, plastochondria is uneven, and the very high byproduct of stickiness, byproduct, which is added among clinker, can form one layer of mucous membrane,
The effect of coagulator is not had at all, therefore the GYPSUM RUBRUM that drying mode as use obtains is accumulated typically as discarded object
Get up, both waste of resource, substantial amounts of soil can be taken again, and its acid property can cause the soil of surrounding also to become acid
Property, produce harmful effect.In the present invention, at using caused acid waste water during Titanium White Production By Sulfuric Acid Process
Reason, GYPSUM RUBRUM is reclaimed, replace original filter press to dry by way of spray drying, free water moisture can be reduced to
Less than 15%, meet that cement plant to moisture requirement of the GYPSUM RUBRUM as coagulator, is turned waste into wealth, overcomes conventional GYPSUM RUBRUM processing
Present in various problems, meet the theory of Green Chemistry, reach the purpose for economizing on resources and comprehensively utilizing, meet national proposition
Walk to economize on resources, the industrial policy for the sustainable development path that environmental protection is mutually coordinated, there is stronger economic benefit and society
Can benefit.
2nd, the recoverying and utilizing method of titanium powder plant discarded object GYPSUM RUBRUM of the present invention, processing step is simple, and efficiency high, can
Just the moisture of GYPSUM RUBRUM can be dropped to less than 15% in a short time, and granule size is uniform, using the inventive method and sets
The GYPSUM RUBRUM that standby recovery obtains disclosure satisfy that the raw material in cement plant enters factory's requirement, a kind of coagulator can be used as to be applied in cement.
3rd, the recoverying and utilizing method of titanium powder plant discarded object GYPSUM RUBRUM of the present invention and equipment apply also for sub- to seven water sulfuric acid
The waste water and seven water obtained after the tail gas spray that iron becomes spent acid waste water caused by ferrous sulfate monohydrate, rotary kiln comes out
Spent acid waste water is handled caused by ferrous sulfate crystallization.
4th, the GYPSUM RUBRUM granularity obtained using the recoverying and utilizing method and equipment of titanium powder plant discarded object GYPSUM RUBRUM of the present invention
Uniform in size, apparent mass is good, appearance might as well, and the thinner surface area that is reacted with clinker of GYPSUM RUBRUM particle is bigger,
Thus reaction speed is very fast and safer, and intensity is also higher.The recycling side of titanium powder plant discarded object GYPSUM RUBRUM of the present invention
Method, while GYPSUM RUBRUM can be made to turn waste into wealth, moreover it is possible to which, for enterprise's increase income, the profit of spray-dried rear GYPSUM RUBRUM per ton obtains
Increase is arrived.
Brief description of the drawings
Fig. 1 is the process chart of the recoverying and utilizing method of titanium powder plant discarded object GYPSUM RUBRUM of the present invention.
Fig. 2 is that the recoverying and utilizing method of titanium powder plant discarded object GYPSUM RUBRUM of the present invention uses the schematic diagram of equipment；
In figure, 1, chain grate furnace, 2, warm-air pipe, 3, air devider, 4, heat-insulation layer, 5, spray gun, 6, spray drying tower, 7, dehumidifier pipe, 8,
Discharging opening, 9, column.
Embodiment
Embodiment 1
A kind of recoverying and utilizing method of titanium powder plant discarded object GYPSUM RUBRUM, to being produced using during Titanium White Production By Sulfuric Acid Process
Acid waste water handled, reclaim GYPSUM RUBRUM；Specifically comprise the following steps：
（1）During Titanium White Production By Sulfuric Acid Process, by isolated sulfuric acid after ilmenite and concentrated sulfuric acid progress acidolysis reaction
Oxygen titanium, titanyl sulfate generates metatitanic acid through hydrolysis, then after press filtration, obtains solid-state metatitanic acid and acid waste water；
（2）The lime stone of 50 mesh is added in acid waste water, the pH value for neutralizing solution is 3, is added in limewash and solution
Solution is extracted into thickening pond by pH value to 6, with pump, standing separation, obtains sludge slurry and sewage；
（3）The sludge slurry of thickening pond bottom is extracted into sludge centrifuge by sewage through directly discharge or reuse after the assay was approved with pump
In, in the presence of centrifuge, the free water in sludge slurry separates again；
（4）Then by the sludge slurry for removing most of free water with being pumped into surge tank, the free water weight in conditioning of mud slurry
It is 30% to measure content, and sludge pulp density is 1.60g/cm3；Flow velocity viscosity meter is 5~50 seconds：
（5）Slurry is extracted into spray drying tower with plunger pump after sizing mixing, is injected to through spray gun in tower, is sprayed at 800~1000 DEG C
Mist, which is dried, obtains even particle size for 1~3 second, and free water moisture weight content is less than 15% GYPSUM RUBRUM, obtained red stone
Cream is discharged from the bottom of towe discharging opening of spray drying tower.
The recoverying and utilizing method of above-mentioned titanium powder plant discarded object GYPSUM RUBRUM, used equipment, including chain grate furnace and spray
Mist drying tower；Described chain grate furnace is connected by the top of warm-air pipe and spray drying tower, and described spray drying tower tower height is
28 meters, spray drying tower top is cylinder, and internal diameter is 10 meters, and tower bottom is in cone, is provided with the top of spray drying tower
Air devider, 30 spray guns are uniformly installed in the tower body at 14 meters of bottom of towe, a dehumidifier is being housed at 8 meters of bottom of towe
Pipe, spray drying tower bottom are provided with discharging opening, and the outer wall of spray drying tower is provided with the heat-insulation layer that a layer thickness is 14cm, heat-insulation layer
The loss of heat in tower can be reduced, saves the energy, heat-insulation layer is from outside to inside steel tank, heat-preservation cotton, the thickness of steel tank, wherein heat-preservation cotton
Spend 9cm.
In practical operation, in chain grate furnace caused hot blast after cyclone dust removal by warm-air pipe from spray drying tower
Tower top is entered in spray drying tower, and air devider of the hot blast by spray drying column overhead uniformly enters spray drying tower
In tower, the temperature in tower is set to reach 800~1000 DEG C, slurry is extracted into spray drying tower by the slurry after sizing mixing with plunger pump, warp
Spray gun is injected in tower, and material is formed vaporific particulate and directly contacted with the hot-air in tower by spray gun, moisture flash evapn,
Even particle size was obtained in 1~3 second, free water moisture weight content is less than 15% GYPSUM RUBRUM, obtained GYPSUM RUBRUM
Discharged from the bottom of towe discharging opening of spray drying tower, and the gas after part cools down is taken out by the dehumidifier pipe of drying tower tower bottom
Go out.
Embodiment 2
A kind of recoverying and utilizing method of titanium powder plant discarded object GYPSUM RUBRUM, to being produced using during Titanium White Production By Sulfuric Acid Process
Acid waste water handled, reclaim GYPSUM RUBRUM；；Specifically comprise the following steps：
（1）During Titanium White Production By Sulfuric Acid Process, by isolated sulfuric acid after ilmenite and concentrated sulfuric acid progress acidolysis reaction
Oxygen titanium, titanyl sulfate generates metatitanic acid through hydrolysis, then after press filtration, obtains solid-state metatitanic acid and acid waste water；
（2）The lime stone of 100 mesh is added in acid waste water, the pH value for neutralizing solution is 3-4, is added in limewash and solution
PH value to 6-9, solution is extracted into thickening pond with pump, standing separation, obtains sludge slurry and sewage；
（3）The sludge slurry of thickening pond bottom is extracted into sludge centrifuge by sewage through directly discharge or reuse after the assay was approved with pump
In, in the presence of centrifuge, the free water in sludge slurry separates again；
（4）Then by the sludge slurry for removing most of free water with being pumped into surge tank, the free water weight in conditioning of mud slurry
It is 50% to measure content, and sludge pulp density is 1.05~1.60g/cm3；Flow velocity viscosity meter is 5~50 seconds：
（5）Slurry is extracted into spray drying tower with plunger pump after sizing mixing, is injected to through spray gun in tower, is sprayed at 800~1000 DEG C
Mist, which is dried, obtains even particle size for 1~3 second, and free water moisture weight content is less than 15% GYPSUM RUBRUM, obtained red stone
Cream is discharged from the bottom of towe discharging opening of spray drying tower.
The recoverying and utilizing method of above-mentioned titanium powder plant discarded object GYPSUM RUBRUM, used equipment, including chain grate furnace and spray
Mist drying tower；Described chain grate furnace is connected by the top of warm-air pipe and spray drying tower, and described spray drying tower tower height is
35 meters, spray drying tower top is cylinder, and internal diameter is 12 meters, and tower bottom is in cone, is provided with the top of spray drying tower
Air devider, 60 spray guns are uniformly installed in the tower body at 16 meters of bottom of towe, a dehumidifier is being housed at 9 meters of bottom of towe
Pipe, spray drying tower bottom are provided with discharging opening, and the outer wall of spray drying tower is provided with the heat-insulation layer that a layer thickness is 17cm, heat-insulation layer
The loss of heat in tower can be reduced, saves the energy, heat-insulation layer is from outside to inside steel tank, heat-preservation cotton, the thickness of steel tank, wherein heat-preservation cotton
Spend 12cm.
In practical operation, in chain grate furnace caused hot blast after cyclone dust removal by warm-air pipe from spray drying tower
Tower top is entered in spray drying tower, and air devider of the hot blast by spray drying column overhead uniformly enters spray drying tower
In tower, the temperature in tower is set to reach 800~1000 DEG C, slurry is extracted into spray drying tower by the slurry after sizing mixing with plunger pump, warp
Spray gun is injected in tower, and material is formed vaporific particulate and directly contacted with the hot-air in tower by spray gun, moisture flash evapn,
Even particle size was obtained in 1~3 second, free water moisture weight content is less than 15% GYPSUM RUBRUM, obtained GYPSUM RUBRUM
Discharged from the bottom of towe discharging opening of spray drying tower, and the gas after part cools down is taken out by the dehumidifier pipe of drying tower tower bottom
Go out.
Embodiment 3
A kind of recoverying and utilizing method of titanium powder plant discarded object GYPSUM RUBRUM, to being produced using during Titanium White Production By Sulfuric Acid Process
Acid waste water handled, reclaim GYPSUM RUBRUM；Specifically comprise the following steps：
（1）During Titanium White Production By Sulfuric Acid Process, the ilmenite returned from mining site purchase is put into reactor, and is added
Enter the concentrated sulfuric acid that mass concentration is 98%, add water initiation reaction, obtain product；Cooling, filters out dust, ore, obtains titanium
Liquid；Titanium liquid is put into vacuum refrigeration centrifuge, then adjusts the vacuum of vacuum refrigeration seperator, ferrous sulfate crystallization, from
The heart separates, and obtains ferrous sulfate heptahydrate crystalline solid and titanyl sulfate；Titanyl sulfate is imported into hydrolytic tank by pipeline,
Seethed with excitement under 102-107 DEG C of hydrolysis temperature, liquid metatitanic acid is made；Obtained liquid metatitanic acid is pressed repeatedly using filter press
Filter, obtains solid-state metatitanic acid and spent acid waste water；
（2）The lime stone of 200 mesh is added in acid waste water, the pH value for neutralizing solution is 3-4, is added in limewash and solution
PH value to 7, solution is extracted into thickening pond with pump, standing separation, obtains sludge slurry and sewage；
（3）The sludge slurry of thickening pond bottom is extracted into sludge centrifuge by sewage through directly discharge or reuse after the assay was approved with pump
In, in the presence of centrifuge, the free water in sludge slurry separates again；
（4）Then by the sludge slurry for removing most of free water with being pumped into surge tank, the free water weight in conditioning of mud slurry
It is 70% to measure content, and sludge pulp density is 1.35g/cm3；Flow velocity viscosity meter is 5~50 seconds：
（5）Slurry is extracted into spray drying tower with plunger pump after sizing mixing, is injected to through spray gun in tower, is sprayed at 800~1000 DEG C
Mist, which is dried, obtains even particle size for 1~3 second, and free water moisture weight content is less than 15% GYPSUM RUBRUM, obtained red stone
Cream is discharged from the bottom of towe discharging opening of spray drying tower.
The recoverying and utilizing method of above-mentioned titanium powder plant discarded object GYPSUM RUBRUM, used equipment, including chain grate furnace and spray
Mist drying tower；Described chain grate furnace is connected by the top of warm-air pipe and spray drying tower, and described spray drying tower tower height is
30 meters, spray drying tower top is cylinder, and internal diameter is 11 meters, and tower bottom is in cone, is provided with the top of spray drying tower
Air devider, 50 spray guns are uniformly installed in the tower body at 15 meters of bottom of towe, a dehumidifier is being housed at 8.5 meters of bottom of towe
Pipe, spray drying tower bottom are provided with discharging opening, and the outer wall of spray drying tower is provided with the heat-insulation layer that a layer thickness is 15cm, heat-insulation layer
The loss of heat in tower can be reduced, saves the energy, heat-insulation layer is from outside to inside steel tank, heat-preservation cotton, the thickness of steel tank, wherein heat-preservation cotton
Spend 10cm.
In practical operation, in chain grate furnace caused hot blast after cyclone dust removal by warm-air pipe from spray drying tower
Tower top is entered in spray drying tower, and air devider of the hot blast by spray drying column overhead uniformly enters spray drying tower
In tower, the temperature in tower is set to reach 800~1000 DEG C, slurry is extracted into spray drying tower by the slurry after sizing mixing with plunger pump, warp
Spray gun is injected in tower, and material is formed vaporific particulate and directly contacted with the hot-air in tower by spray gun, moisture flash evapn,
Even particle size was obtained in 1~3 second, free water moisture weight content is less than 15% GYPSUM RUBRUM, obtained GYPSUM RUBRUM
Discharged from the bottom of towe discharging opening of spray drying tower, and the gas after part cools down is taken out by the dehumidifier pipe of drying tower tower bottom
Go out.
Embodiment 4
A kind of recoverying and utilizing method of titanium powder plant discarded object GYPSUM RUBRUM, to being produced using during Titanium White Production By Sulfuric Acid Process
Acid waste water handled, reclaim GYPSUM RUBRUM；Specifically comprise the following steps：
（1）During Titanium White Production By Sulfuric Acid Process, the ilmenite returned from mining site purchase is put into reactor, and is added
Enter the concentrated sulfuric acid that mass concentration is 98%, add water initiation reaction, obtain product；Cooling, filters out dust, ore, obtains titanium
Liquid；Titanium liquid is put into vacuum refrigeration centrifuge, then adjusts the vacuum of vacuum refrigeration seperator, ferrous sulfate crystallization, from
The heart separates, and obtains ferrous sulfate heptahydrate crystalline solid and titanyl sulfate；Titanyl sulfate is imported into hydrolytic tank by pipeline,
Seethed with excitement under 102-107 DEG C of hydrolysis temperature, liquid metatitanic acid is made；Obtained liquid metatitanic acid is pressed repeatedly using filter press
Filter, obtains solid-state metatitanic acid and spent acid waste water；
（2）The lime stone of 250 mesh is added in acid waste water, the pH value for neutralizing solution is 4, is added in limewash and solution
Solution is extracted into thickening pond by pH value to 9, with pump, standing separation, obtains sludge slurry and sewage；
（3）The sludge slurry of thickening pond bottom is extracted into sludge centrifuge by sewage through directly discharge or reuse after the assay was approved with pump
In, in the presence of centrifuge, the free water in sludge slurry separates again；
（4）Then by the sludge slurry for removing most of free water with being pumped into surge tank, the free water weight in conditioning of mud slurry
It is 90% to measure content, and sludge pulp density is 1.05g/cm3；Flow velocity viscosity meter is 5~50 seconds：
（5）Slurry is extracted into spray drying tower with plunger pump after sizing mixing, is injected to through spray gun in tower, is sprayed at 800~1000 DEG C
Mist, which is dried, obtains even particle size for 1~3 second, and free water moisture weight content is less than 15% GYPSUM RUBRUM, obtained red stone
Cream is discharged from the bottom of towe discharging opening of spray drying tower.
The recoverying and utilizing method of above-mentioned titanium powder plant discarded object GYPSUM RUBRUM, used equipment, including chain grate furnace and spray
Mist drying tower；Described chain grate furnace is connected by the top of warm-air pipe and spray drying tower, and described spray drying tower tower height is
35 meters, spray drying tower top is cylinder, and internal diameter is 12 meters, and tower bottom is in cone, is provided with the top of spray drying tower
Air devider, 45 spray guns are uniformly installed in the tower body at 16 meters of bottom of towe, a dehumidifier is being housed at 9 meters of bottom of towe
Pipe, spray drying tower bottom are provided with discharging opening, and the outer wall of spray drying tower is provided with the heat-insulation layer that a layer thickness is 17cm, heat-insulation layer
The loss of heat in tower can be reduced, saves the energy, heat-insulation layer is from outside to inside steel tank, heat-preservation cotton, the thickness of steel tank, wherein heat-preservation cotton
Spend 12cm.
In practical operation, in chain grate furnace caused hot blast after cyclone dust removal by warm-air pipe from spray drying tower
Tower top is entered in spray drying tower, and air devider of the hot blast by spray drying column overhead uniformly enters spray drying tower
In tower, the temperature in tower is set to reach 800~1000 DEG C, slurry is extracted into spray drying tower by the slurry after sizing mixing with plunger pump, warp
Spray gun is injected in tower, and material is formed vaporific particulate and directly contacted with the hot-air in tower by spray gun, moisture flash evapn,
Even particle size was obtained in 1~3 second, free water moisture weight content is less than 15% GYPSUM RUBRUM, obtained GYPSUM RUBRUM
Discharged from the bottom of towe discharging opening of spray drying tower, and the gas after part cools down is taken out by the dehumidifier pipe of drying tower tower bottom
Go out.
Application Example
Guangxi Teng County titanium powder plant, GYPSUM RUBRUM was handled using traditional filter press seasoning before 2015, Ji Jiangsheng
Produce caused spent acid waste water lime stone in titanium dioxide process（Water）The waste residue obtained after neutralization is directly done with filter press, is obtained
Free water moisture is 25-30%, and plastochondria is uneven, the very high waste residue of stickiness, and waste residue is added among clinker can shape
Into one layer of mucous membrane, the effect of coagulator is not had at all, therefore the GYPSUM RUBRUM that drying mode as use obtains is typically to make
Come for discarded object heap, not only waste of resource but also taken substantial amounts of soil.After 2015, the factory employs discarded object of the present invention
The recoverying and utilizing method of GYPSUM RUBRUM carries out processing recovery to GYPSUM RUBRUM, replaces original filter press to dry using spray drying, leads to
Mechanism is crossed, the GYPSUM RUBRUM that need to will be dried, is dispersed into the very thin particulate as mist,（Increase moisture evaporation area, accelerate
Drying process）With hot air, most of moisture is removed in moment, GYPSUM RUBRUM is dried to powder, finally makes GYPSUM RUBRUM
Free water moisture be reduced to less than 15%, meet cement plant to moisture requirement of the GYPSUM RUBRUM as coagulator, and its grain
Spend uniform in size, turn waste into wealth.Ensureing free water moisture while less than less than 15%, GYPSUM RUBRUM per ton dries energy
Consumption saves 20 yuan, and the GYPSUM RUBRUM by spray drying can be applied in clinker as a kind of coagulator, and GYPSUM RUBRUM per ton is received
Enter increase about 20-35 members, GYPSUM RUBRUM benefit increase per ton about 40-75 members, economic benefit is created for enterprise.Titanium dioxide of the present invention
The recoverying and utilizing method of factory's discarded object GYPSUM RUBRUM had both met the industrial policy of national " energy-saving and emission-reduction ", and it is comprehensive that and can greatly improves enterprise
Close benefit.
Claims (3)
1. a kind of recoverying and utilizing method of titanium powder plant discarded object GYPSUM RUBRUM, to using being produced during Titanium White Production By Sulfuric Acid Process
Raw acid waste water is handled, and reclaims GYPSUM RUBRUM；It is characterized in that：Specifically comprise the following steps：
（1）During Titanium White Production By Sulfuric Acid Process, by isolated sulfuric acid after ilmenite and concentrated sulfuric acid progress acidolysis reaction
Oxygen titanium, titanyl sulfate generates metatitanic acid through hydrolysis, then after press filtration, obtains solid-state metatitanic acid and acid waste water；
（2）The lime stone of 50-250 mesh is added in acid waste water, the pH value for neutralizing solution is 3-4, adds limewash neutralization
Solution is extracted into thickening pond to 6-9, standing separation, obtains sludge slurry and sewage by the pH value of solution with pump；
（3）The sludge slurry of thickening pond bottom is extracted into sludge centrifuge by sewage through directly discharge or reuse after the assay was approved with pump
In, in the presence of centrifuge, the free water in sludge slurry separates again；
（4）Then by the sludge slurry for removing most of free water with being pumped into surge tank, the free water weight in conditioning of mud slurry
It is 30%~90% to measure content, and sludge pulp density is 1.05~1.60g/cm3；Flow velocity viscosity meter is 5~50 seconds：
（5）Slurry is extracted into spray drying tower with plunger pump after sizing mixing, is injected to through spray gun in tower, is sprayed at 800~1000 DEG C
Mist drying to obtain even particle size, free water moisture weight content are less than 15% GYPSUM RUBRUM, and obtained GYPSUM RUBRUM is from spray
The bottom of towe discharging opening discharge of mist drying tower.
2. the recoverying and utilizing method of titanium powder plant discarded object GYPSUM RUBRUM according to claim 1, it is characterised in that：The step
Suddenly（5）Drying Time of Vertical Spray Dryer of the middle slurry after spray gun is injected in spray drying tower is 1~3 second.
3. the equipment that a kind of recoverying and utilizing method of titanium powder plant discarded object GYPSUM RUBRUM uses, it is characterised in that：Including chain grate furnace
And spray drying tower；Described chain grate furnace is connected by the top of warm-air pipe and spray drying tower, described spray drying tower tower
A height of 28-35 rice, spray drying tower top are cylinders, and internal diameter is 10-12 rice, and tower bottom is in cone, spray drying tower
Top is provided with air devider, is uniformly provided with 30-60 branch spray guns in the middle part of tower body, a dehumidifier is being housed at bottom of towe 8-9 rice
Pipe, spray drying tower bottom are provided with discharging opening, and the outer wall of spray drying tower is provided with one layer of heat preservation layer, and heat-insulation layer is steel from outside to inside
Groove, heat-preservation cotton, steel tank.
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| CN112341107A (en) * | 2020-11-23 | 2021-02-09 | 广西云燕特种水泥建材有限公司 | Method for energy-saving production of composite high-strength cement by using various industrial wastes |
| CN112441676A (en) * | 2019-09-02 | 2021-03-05 | 攀枝花大互通钛业有限公司 | Method for treating acid wastewater of titanium dioxide by sulfuric acid process |
| CN112678996A (en) * | 2020-12-30 | 2021-04-20 | 广西藤县广峰钛白有限公司 | Treatment process of acidic wastewater in titanium dioxide production |
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