CN107935029A - A kind of purification method of decorating base paper titanium white production raw material - Google Patents

A kind of purification method of decorating base paper titanium white production raw material Download PDF

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Publication number
CN107935029A
CN107935029A CN201711183959.3A CN201711183959A CN107935029A CN 107935029 A CN107935029 A CN 107935029A CN 201711183959 A CN201711183959 A CN 201711183959A CN 107935029 A CN107935029 A CN 107935029A
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tank
crystallizing tank
temperature
crystallizing
passed
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CN107935029B (en
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张建平
张川
张千
张潇
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HEBEI MILSON TITANIUM DIOXIDE CO Ltd
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HEBEI MILSON TITANIUM DIOXIDE CO Ltd
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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
    • C01G23/008—Titanium- and titanyl sulfate
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G49/00—Compounds of iron
    • C01G49/14—Sulfates
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/80—Compositional purity

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)
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Abstract

A kind of purification method of decorating base paper titanium white production raw material, belongs to sulfuric acid method titanium pigment production technical field, is handled in the crystallizing tank with blender, comprised the following steps：A, titanium sulfate liquid, turn on agitator are added into crystallizing tank；B, the pressure inside the tank of crystallizing tank is controlled to cool down material；C, auxiliary steam is passed through into crystallizing tank, while auxiliary circulation water is passed through into crystallizing tank, control auxiliary circulation water into temperature of charge in tank temperature and opening temperature, pressure inside the tank, tank；D, main steam is passed through into crystallizing tank, while major cycle water is passed through into crystallizing tank, control major cycle water into temperature of charge in tank temperature and opening temperature, pressure inside the tank, tank；E, stop being passed through auxiliary steam, main steam, auxiliary circulation water, major cycle water, treat that pressure inside the tank is equal to environmental pressure, blowing, filtering.The method of the present invention realizes the purification to titanium sulfate liquid, improves the efficiency of ferrous sulfate crystallization in titanium sulfate liquid.

Description

A kind of purification method of decorating base paper titanium white production raw material
Technical field
The invention belongs to sulfuric acid method titanium pigment production technical field, is related to a kind of the net of decorating base paper titanium white production raw material Change method, the method for specifically separating ferrous sulfate.Purification method of the present invention can greatly improve ferrous sulfate in titanium sulfate liquid The efficiency of crystallization, realizes the separation to ferrous sulfate, while ensure that iron titanium ratio in titanium sulfate liquid.
Background technology
Sulfuric acid process decorating base paper titanium white production raw material sulphuric acid titanium liquid decomposes titanium ore by the concentrated sulfuric acid and forms, in titanium sulfate liquid Fe2+Content is higher, influences to hydrolyze the granularity and particle diameter distribution, strainability, washing effect of metatitanic acid, titanium sulfate liquid needs to control Certain Fe2+/TiO2Value, needs a large amount of Fe before titanium sulfate liquid acidolysis2+With FeSO4·7H2The form of O is separated off, stringent control Titanium liquid iron titanium ratio processed is in a suitable scope.Ferrous sulfate solubility is influenced by temperature very big.Current each manufacturer Ferrous sulfate supersaturation crystallization in titanium sulfate liquid all is separated out using reduction titanium sulfate liquid temperature degree, then removing is isolated by filtration FeSO4·7H2The method of O crystal controls iron titanium ratio in titanium sulfate liquid.
Reducing the temperature of titanium sulfate liquid has two kinds of key industry methods, and one kind is cryogenic media cooling frozen cooling, usually It is freezing and crystallizing；A kind of is to absorb heat by the water in negative pressure evaporation titanium sulfate liquid, reduces titanium sulfate liquid temperature degree, is usually cried true Sky crystallization.The freezing and crystallizing thermal efficiency is low；The vacuum crystallization thermal efficiency is of a relatively high, and capacity of equipment is relatively large.Vacuum crystallization is gradual As the main method of sulfuric acid method titanium pigment production ferrous sulfate crystallization.Vacuum crystallization belongs to ratio in sulfuric acid method titanium pigment production A kind of newer method for crystallising, although belonging to physical process, technique is simple, it is operated and equipment influences clean-up effect, existing Have that vacuum crystallization purification method clean-up effect is poor, ferrous sulfate crystallization efficiency is low, separation is difficult.
The content of the invention
Present invention aim to address the problem of ferrous sulfate separation, and above-mentioned described existing ferrous sulfate separation is deposited The problem of, the present invention realizes the purification to titanium sulfate liquid by starting with from crystalline texture and technology controlling and process two in terms of, raising The efficiency of ferrous sulfate crystallization in titanium sulfate liquid.
The present invention is to realize that the technical solution that its purpose uses is：
A kind of purification method of decorating base paper titanium white production raw material, is handled in the crystallizing tank with blender, Comprise the following steps：
A, titanium sulfate liquid, turn on agitator are added into crystallizing tank；
B, it is 6.0-13KPa absolute pressures by the pressure inside the tank control of crystallizing tank, material is cooled to 35-38 DEG C；
C, auxiliary steam is passed through into crystallizing tank with the flow of 15-20kg/min, while with 1-2m3/ min flows are to crystallization Auxiliary circulation water is passed through in tank, control auxiliary circulation water is 30-32 DEG C into tank temperature, and opening temperature is 35-37 DEG C, crystallizing tank Pressure inside the tank be 3.0-4.0kPa absolute pressures, temperature of charge is 26-29 DEG C in tank；
D, main steam is passed through into crystallizing tank with the flow of 60-80kg/min, while with 5-6m3/ min flows are to crystallizing tank In be passed through major cycle water, control major cycle water is 30-32 DEG C into tank temperature, and opening temperature is 35-37 DEG C, in the tank of crystallizing tank Pressure is 1.5-1.8kPa absolute pressures, and temperature of charge is 14-16 DEG C in tank；
E, stop being passed through auxiliary steam, main steam, auxiliary circulation water, major cycle water, treat that pressure inside the tank is equal to environmental pressure, Blowing, filtering.
For the blender in the tilted setting of crystallizing tank, blender and horizontal direction angle are 15-20 °.Present invention stirring The purpose that device is obliquely installed is to increase Radial Flow, and angle is less than 15 °, Radial Flow gain effect unobvious；Angle is big In 20 °, the uniformity of crystal structure is influenced, therefore, it is necessary to strictly control 15-20 ° of blender and horizontal direction angle.
The cylinder of crystallizing tank is increased into 500mm.Equipment increased value is less than 500mm, and indirect steam folder liquid measure is more, titanium liquid damage Lose more；Equipment increased value is higher than 500mm, and cylinder is excessive to cause vacuum crystallization tank unstability.
The addition of titanium sulfate liquid is the 44.6-50% of crystallization tank volume.
In step A, the rotating speed of blender is 150-200r/min.
The beneficial effects of the invention are as follows：
1st, crystallization technique of the present invention has saved crystallisation by cooling time, steam consumption, titaniferous in separated errous sulfate crystal Amount reduces, and improves Crystallization Separation process yield.
2nd, the crystal amount of precipitation of ferrous sulfate is represented in the present invention with iron titanium ratio in purified product, iron titanium ratio is by embodiment Determine.
3rd, errous sulfate crystal is byproduct, and the titaniferous amount in errous sulfate crystal is below the titaniferous of reference 0.31% Amount.
4th, it is that crystal generation needs first to generate nucleus that the steam of small flow and water are first passed through in the present invention, improves the pure of crystal Degree；The steam and water of big flow are passed through again, are to ensure the thermodynamic cycle above and below the good boiling and titanium liquid of crystallizing system, make Ferrous sulfate crystallization is uniformly pure.
5th, the pressure in tank is controlled in 6.0-16kPa in step B, makes to reach in crystallizing tank certain vacuum, reduced Titanium liquid boiling point, is conducive to ferrous sulfate precipitation, improves titanium liquid purity.
6th, material is cooled to 35-40 DEG C, when titanium liquid is extracted by titanium ore in step B, adds concentrated sulfuric acid heat production, temperature mistake Crystallization in height crystallizing tank not easy to control separates out, and ferrous sulfate solubility can be reduced by being cooled to room temperature, brilliant beneficial to ferrous sulfate Body separates out, and improves titanium liquid purity.
7th, the design of step C processes is to be passed through the thermodynamic cycle that auxiliary steam promotes titanium liquid, the good boiling of control titanium liquid Thermodynamic cycle up and down with improvement material system, is first passed through auxiliary steam, with the flow control of 15-20kg/min, makes nucleus Generate more and uniform, improve the purity of crystal.
8th, the design of step D processes is the thermodynamic cycle that logical main steam further promotes titanium liquid, and the good of control titanium liquid is boiled Rise and improve the thermodynamic cycle up and down in material system, main steam is passed through with the flow of 60-80kg/min, it is therefore an objective to promote crystal Growth, accelerates rate of crystalline growth.
Brief description of the drawings
Fig. 1 is the structure diagram that blender of the present invention is set in crystallizing tank.
Wherein, 01 crystallizing tank is represented, 02 represents blender, and 03 represents indirect steam outlet, and 04 represents discharge port, and 05 represents Feed inlet, 06 represents outlet of sewer, and 07 represents evacuated tube.
Embodiment
With reference to specific embodiment, the present invention is further illustrated.
First, specific embodiment
Embodiment 1
A kind of purification method of decorating base paper titanium white production raw material, is handled in the crystallizing tank with blender, The volume of crystallizing tank used is 56m3, cylinder has been increased into 500mm on the crystallizing tank of purchase, which adds indirect steam With titanium sulfate liquid separated space, reduce indirect steam folder liquid measure, reduce the loss of titanium sulfate liquid；Blender and horizontal direction Angle be 15 °, which makes in tank material increase Radial Flow, and material mixes evenly, and crystalline rate improves, ferrous sulfate Evenly, errous sulfate crystal glues wall reduction to crystal, comprises the following steps：
A, 25m is added into crystallizing tank3Titanium sulfate liquid (concentration TiO2121g/L), turn on agitator, control rotating speed 150r/ min；
B, it is 6.9kPa absolute pressures by the pressure inside the tank control of crystallizing tank, material is cooled to 38 DEG C；
C, auxiliary steam is passed through into crystallizing tank with the flow of 15kg/min, pressure 1.0MPa (table), while with 1m3/min Flow is passed through auxiliary circulation water into crystallizing tank, and control auxiliary circulation water is 30 DEG C into tank temperature, and opening temperature is 35 DEG C, knot The pressure inside the tank of brilliant tank is 3.5kPa absolute pressures, and temperature of charge is 27 DEG C in tank；
D, main steam is passed through into crystallizing tank with the flow of 60kg/min, while with 5m3/ min flows lead into crystallizing tank Recirculated water is become owner of, control major cycle water is 31 DEG C into tank temperature, and opening temperature is 35 DEG C, and the pressure inside the tank of crystallizing tank is 1.7kPa absolute pressures, temperature of charge is 16 DEG C in tank；
E, stop being passed through auxiliary steam, main steam, auxiliary circulation water, major cycle water, treat that pressure inside the tank is equal to environmental pressure, Blowing, filtering.
Embodiment 2
A kind of purification method of decorating base paper titanium white production raw material, is handled in the crystallizing tank with blender, The volume of crystallizing tank used is 56m3, cylinder has been increased into 500mm on the crystallizing tank of purchase, which adds indirect steam With titanium sulfate liquid separated space, reduce indirect steam folder liquid measure, reduce the loss of titanium sulfate liquid；Blender and horizontal direction Angle be 15 °, which makes in tank material increase Radial Flow, and material mixes evenly, and crystalline rate improves, ferrous sulfate Evenly, errous sulfate crystal glues wall reduction to crystal, comprises the following steps：
A, 26m is added into crystallizing tank3Titanium sulfate liquid (concentration TiO2121g/L), turn on agitator, control rotating speed 170r/ min；
B, it is 6.6kPa absolute pressures by the pressure inside the tank control of crystallizing tank, material is cooled to 38 DEG C；
C, auxiliary steam is passed through into crystallizing tank with the flow of 18kg/min, pressure 1.2MPa (table), while with 1.2m3/ Min flows are passed through auxiliary circulation water into crystallizing tank, control auxiliary circulation water into tank temperature be 30 DEG C, opening temperature 35 DEG C, the pressure inside the tank of crystallizing tank is 3.7KPa absolute pressures, and temperature of charge is 29 DEG C in tank；
D, main steam is passed through into crystallizing tank with the flow of 70kg/min, while with 5m3/ min flows lead into crystallizing tank Recirculated water is become owner of, control major cycle water is 30 DEG C into tank temperature, and opening temperature is 35 DEG C, and the pressure inside the tank of crystallizing tank is 1.5kPa absolute pressures, temperature of charge is 14 DEG C in tank；
E, stop being passed through auxiliary steam, main steam, auxiliary circulation water, major cycle water, treat that pressure inside the tank is equal to environmental pressure, Blowing, filtering.
Embodiment 3
A kind of purification method of decorating base paper titanium white production raw material, is handled in the crystallizing tank with blender, The volume of crystallizing tank used is 56m3, cylinder has been increased into 500mm on the crystallizing tank of purchase, which adds indirect steam With titanium sulfate liquid separated space, reduce indirect steam folder liquid measure, reduce the loss of titanium sulfate liquid；Blender and horizontal direction Angle be 20 °, which makes in tank material increase Radial Flow, and material mixes evenly, and crystalline rate improves, ferrous sulfate Evenly, errous sulfate crystal glues wall reduction to crystal, comprises the following steps：
A, 25m is added into crystallizing tank3Titanium sulfate liquid (concentration TiO2121g/L), turn on agitator, control rotating speed 200r/ min；
B, it is 7.0kPa absolute pressures by the pressure inside the tank control of crystallizing tank, material is cooled to 35 DEG C；
C, auxiliary steam is passed through into crystallizing tank with the flow of 20kg/min, pressure 1.2MPa (table), while with 1.8m3/ Min flows are passed through auxiliary circulation water into crystallizing tank, control auxiliary circulation water into tank temperature be 32 DEG C, opening temperature 37 DEG C, the pressure inside the tank of crystallizing tank is 4.0kPa absolute pressures, and temperature of charge is 29 DEG C in tank；
D, main steam is passed through into crystallizing tank with the flow of 80kg/min, while with 6m3/ min flows lead into crystallizing tank Recirculated water is become owner of, control major cycle water is 32 DEG C into tank temperature, and opening temperature is 37 DEG C, and the pressure inside the tank of crystallizing tank is 1.5kPa absolute pressures, temperature of charge is 16 DEG C in tank；
E, stop being passed through auxiliary steam, main steam, auxiliary circulation water, major cycle water, treat that pressure inside the tank is equal to environmental pressure, Blowing, filtering.
Embodiment 4
A kind of purification method of decorating base paper titanium white production raw material, is handled in the crystallizing tank with blender, The volume of crystallizing tank used is 56m3, cylinder has been increased into 500mm on the crystallizing tank of purchase, which adds indirect steam With titanium sulfate liquid separated space, reduce indirect steam folder liquid measure, reduce the loss of titanium sulfate liquid；Blender and horizontal direction Angle be 15 °, which makes in tank material increase Radial Flow, and material mixes evenly, and crystalline rate improves, ferrous sulfate Evenly, errous sulfate crystal glues wall reduction to crystal, comprises the following steps：
A, 27m is added into crystallizing tank3Titanium sulfate liquid, turn on agitator, control rotating speed 180r/min；
B, it is 10kPa absolute pressures by the pressure inside the tank control of crystallizing tank, material is cooled to 36 DEG C；
C, auxiliary steam is passed through into crystallizing tank with the flow of 17kg/min, while with 1.5m3/ min flows are to crystallizing tank In be passed through auxiliary circulation water, control auxiliary circulation water into tank temperature be 31 DEG C, opening temperature be 36 DEG C, the tank internal pressure of crystallizing tank Power is 3.0kPa absolute pressures, and temperature of charge is 26 DEG C in tank；
D, main steam is passed through into crystallizing tank with the flow of 65kg/min, while with 6m3/ min flows lead into crystallizing tank Recirculated water is become owner of, control major cycle water is 31 DEG C into tank temperature, and opening temperature is 36 DEG C, and the pressure inside the tank of crystallizing tank is 1.6kPa absolute pressures, temperature of charge is 15 DEG C in tank；
E, stop being passed through auxiliary steam, main steam, auxiliary circulation water, major cycle water, treat that pressure inside the tank is equal to environmental pressure, Blowing, filtering.
Embodiment 5
A kind of purification method of decorating base paper titanium white production raw material, is handled in the crystallizing tank with blender, The volume of crystallizing tank used is 56m3, cylinder has been increased into 500mm on the crystallizing tank of purchase, which adds indirect steam With titanium sulfate liquid separated space, reduce indirect steam folder liquid measure, reduce the loss of titanium sulfate liquid；Blender and horizontal direction Angle be 20 °, which makes in tank material increase Radial Flow, and material mixes evenly, and crystalline rate improves, ferrous sulfate Evenly, errous sulfate crystal glues wall reduction to crystal, comprises the following steps：
A, 26m is added into crystallizing tank3Titanium sulfate liquid, turn on agitator, control rotating speed 160r/min；
B, it is 13kPa absolute pressures by the pressure inside the tank control of crystallizing tank, material is cooled to 36 DEG C；
C, auxiliary steam is passed through into crystallizing tank with the flow of 19kg/min, while with 2m3/ min flows are into crystallizing tank Auxiliary circulation water is passed through, control auxiliary circulation water is 32 DEG C into tank temperature, and opening temperature is 37 DEG C, the pressure inside the tank of crystallizing tank For 3.3kPa absolute pressures, temperature of charge is 28 DEG C in tank；
D, main steam is passed through into crystallizing tank with the flow of 75kg/min, while with 5m3/ min flows lead into crystallizing tank Recirculated water is become owner of, control major cycle water is 32 DEG C into tank temperature, and opening temperature is 37 DEG C, and the pressure inside the tank of crystallizing tank is 1.8kPa absolute pressures, temperature of charge is 16 DEG C in tank；
E, stop being passed through auxiliary steam, main steam, auxiliary circulation water, major cycle water, treat that pressure inside the tank is equal to environmental pressure, Blowing, filtering.
Embodiment 6
A kind of purification method of decorating base paper titanium white production raw material, is handled in the crystallizing tank with blender, The volume of crystallizing tank used is 56m3, cylinder has been increased into 500mm on the crystallizing tank of purchase, which adds indirect steam With titanium sulfate liquid separated space, reduce indirect steam folder liquid measure, reduce the loss of titanium sulfate liquid；Blender and horizontal direction Angle be 15 °, which makes in tank material increase Radial Flow, and material mixes evenly, and crystalline rate improves, ferrous sulfate Evenly, errous sulfate crystal glues wall reduction to crystal, comprises the following steps：
A, 27m is added into crystallizing tank3Titanium sulfate liquid, turn on agitator, control rotating speed 190r/min；
B, it is 12kPa absolute pressures by the pressure inside the tank control of crystallizing tank, material is cooled to 37 DEG C；
C, auxiliary steam is passed through into crystallizing tank with the flow of 16kg/min, while with 1.6m3/ min flows are to crystallizing tank In be passed through auxiliary circulation water, control auxiliary circulation water into tank temperature be 30 DEG C, opening temperature be 35 DEG C, the tank internal pressure of crystallizing tank Power is 3.8KPa absolute pressures, and temperature of charge is 29 DEG C in tank；
D, main steam is passed through into crystallizing tank with the flow of 80kg/min, while with 5m3/ min flows lead into crystallizing tank Recirculated water is become owner of, control major cycle water is 30 DEG C into tank temperature, and opening temperature is 37 DEG C, and the pressure inside the tank of crystallizing tank is 1.7kPa absolute pressures, temperature of charge is 15 DEG C in tank；
E, stop being passed through auxiliary steam, main steam, auxiliary circulation water, major cycle water, treat that pressure inside the tank is equal to environmental pressure, Blowing, filtering.
2nd, test effect
Compare the embodiment of the present invention and existing crystallization technique makees reference, with crystallization time, steam consumption, ferrous sulfate Three indexs of crystal titaniferous amount carry out measurement technology effect.The result is shown in table 1 below.
Table 1
As shown in Table 1, crystallization technique of the present invention has saved crystallisation by cooling time, steam consumption, and separated ferrous sulfate is brilliant Body titaniferous amount reduces, and improves Crystallization Separation process yield.

Claims (5)

1. a kind of purification method of decorating base paper titanium white production raw material, is handled in the crystallizing tank with blender, its It is characterized in that, comprises the following steps：
A, titanium sulfate liquid, turn on agitator are added into crystallizing tank；
B, it is 6.0-13KPa absolute pressures by the pressure inside the tank control of crystallizing tank, material is cooled to 35-38 DEG C；
C, auxiliary steam is passed through into crystallizing tank with the flow of 15-20kg/min, while with 1-2m3/ min flows are into crystallizing tank Auxiliary circulation water is passed through, control auxiliary circulation water is 30-32 DEG C into tank temperature, and opening temperature is 35-37 DEG C, the tank of crystallizing tank Interior pressure is 3.0-4.0kPa absolute pressures, and temperature of charge is 26-29 DEG C in tank；
D, main steam is passed through into crystallizing tank with the flow of 60-80kg/min, while with 5-6m3/ min flows lead into crystallizing tank Recirculated water is become owner of, control major cycle water is 30-32 DEG C into tank temperature, and opening temperature is 35-37 DEG C, the pressure inside the tank of crystallizing tank For 1.5-1.8kPa absolute pressures, temperature of charge is 14-16 DEG C in tank；
E, stop being passed through auxiliary steam, main steam, auxiliary circulation water, major cycle water, treat that pressure inside the tank is equal to environmental pressure, put Material, filtering.
2. the purification method of a kind of decorating base paper titanium white production raw material according to claim 1, it is characterised in that described For blender in the tilted setting of crystallizing tank, blender and horizontal direction angle are 15-20 °.
3. the purification method of a kind of decorating base paper titanium white production raw material according to claim 1, it is characterised in that will tie The cylinder of brilliant tank increases 500mm.
A kind of 4. purification method of decorating base paper titanium white production raw material according to claim 1, it is characterised in that sulfuric acid The addition of titanium liquid is the 44.6-50% of crystallization tank volume.
A kind of 5. purification method of decorating base paper titanium white production raw material according to claim 1, it is characterised in that step In A, the rotating speed of blender is 150-200r/min.
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203469527U (en) * 2013-08-30 2014-03-12 漯河兴茂钛业股份有限公司 Multistage high-efficiency titanium liquid vacuum crystallization device
CN204865055U (en) * 2015-06-11 2015-12-16 江阴市江中设备制造有限公司 Titanium liquid vacuum crystallization equipment
CN105289036A (en) * 2015-10-27 2016-02-03 南京白云化工环境监测有限公司 Novel method for performing vacuum crystallization on ferrous sulfate from titanium liquid in titanium dioxide production process
CN106390507A (en) * 2016-11-23 2017-02-15 重庆鹏越科技发展有限公司 Continuous vacuum crystallization system of titanium black liquor and application method of continuous vacuum crystallization system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203469527U (en) * 2013-08-30 2014-03-12 漯河兴茂钛业股份有限公司 Multistage high-efficiency titanium liquid vacuum crystallization device
CN204865055U (en) * 2015-06-11 2015-12-16 江阴市江中设备制造有限公司 Titanium liquid vacuum crystallization equipment
CN105289036A (en) * 2015-10-27 2016-02-03 南京白云化工环境监测有限公司 Novel method for performing vacuum crystallization on ferrous sulfate from titanium liquid in titanium dioxide production process
CN106390507A (en) * 2016-11-23 2017-02-15 重庆鹏越科技发展有限公司 Continuous vacuum crystallization system of titanium black liquor and application method of continuous vacuum crystallization system

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