CN105038329B - A kind of mashing process for dispersing of titanium dioxide - Google Patents
A kind of mashing process for dispersing of titanium dioxide Download PDFInfo
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Abstract
The invention belongs to chemical field, it is related to a kind of mashing process for dispersing of titanium dioxide, the mashing process for dispersing for the high-concentration titanium dioxide slurry being specifically related to before titanium dioxide first product wet-milling.It is an object of the invention to provide the mashing process for dispersing can solve the problems such as existing beating process slurry concentration is low, slurry dispersion stabilization is poor, viscosity is big, environmental pollution is big, improve yield and quality, reduction unit cost and energy consumption.Present invention mashing process for dispersing comprises the following steps：(1) processing mashing dispersant：Dispersant is added water and is beaten in the beating equipment with agitating device, and mashing dispersant addition is the 0.1~0.5% of content of titanium dioxide；(2) slurry concentration is controlled：Titanium dioxide first product is added into beating equipment, it is 600~1200g/L to add water and control slurry concentration；(3) dispersed paste：Slurry obtained by step (2) is scattered 30~60 minutes, produce and be beaten scattered titania slurry.
Description
Technical field
The invention belongs to chemical field, it is related to a kind of mashing process for dispersing of titanium dioxide, is specifically related to titanium dioxide
Mashing process for dispersing before first product wet-milling, even more the mashing process for dispersing for high-concentration titanium dioxide slurry.
Background technology
Titanium dioxide is commonly called as titanium dioxide, is a kind of important Chinese white, white with traditional white lead, zinc white, lithopone etc.
Color pigment is compared, and it is a variety of excellent that titanium dioxide has that refractive index is high, reducing power is strong, covering power is big, good dispersion, whiteness are good, nontoxic etc.
Different in nature energy, is referred to as the king of Chinese white, is widely used in the industries such as coating, plastics, ink, papermaking, chemical fibre, ceramics.
But, the crude product that either sulfuric acid process or chloridising are produced, although purity is very high cannot function as white face
Material is used, it is necessary to carry out surface modification by post processing.The post processing of titanium dioxide includes：Mashing is scattered, wet-milling, at inorganic surfaces
The processes such as reason, washing, dry, organic surface treatment, vapour powder and packaging.Due to titanium dioxide Ti-O bond lengths from small and
Long, this uneven so that titania molecule polarity is very strong, easy to reunite, dispersion stabilization is poor in pulping process, slurry viscosity
Height, poor fluidity, it is impossible to be smoothly pumped into wet-milling process, can also influence the quality of wet-milling and inorganic surface treatment, and slurry is dense
Degree is higher, and the dispersion stabilization of slurry is poorer, and viscosity is higher, and mobility is poorer, and the influence to subsequent handling is bigger.Therefore, titanium
The selection of white powder manufacturer is beaten under low concentration, i.e., content of titanium dioxide is less than 600g/L, and is added when mashing is scattered
It is beaten dispersant.But there is following defect in above-mentioned processing mode：
1) mashing can influence yield, unit cost increase, and the efficiency of influence wet-milling under low concentration, increase wet-milling and set
Standby loss and energy consumption.
2) addition mashing dispersant and acid or alkali regulation slurry pH value, at present conventional mashing point in pulping process are needed
Powder be alcamines and phosphoric acid salt, or alcamines and phosphoric acid salt compound, but this two class mashing dispersant contain respectively
Nitrogen and phosphorus, are unfavorable for environmental protection.
The present invention is intended to provide a kind of mashing process for dispersing of high-concentration titanium dioxide slurry, will can be beaten using this method mashing
Slurry concentration brings up to 600~1200g/L, and obtained Titanium dioxide slurry has good dispersion stabilization, and slurry viscosity is low, and
The mashing dispersant is not nitrogenous and phosphorus, environmentally safe, it is not required that addition acid or alkali regulation slurry pH value.
The content of the invention
It is an object of the invention to provide a kind of mashing of the high-concentration titanium dioxide slurry before titanium dioxide first product wet-milling
Process for dispersing, is asked with solving that existing beating process slurry concentration is low, slurry dispersion stabilization is poor, viscosity is big, environmental pollution is big etc.
Topic, improves yield and quality, reduction unit cost and energy consumption.
To reach above-mentioned purpose, the invention provides a kind of mashing process for dispersing of new titania slurry, especially
Applied to the high-concentration titanium dioxide slurry before titanium dioxide first product wet-milling, it the described method comprises the following steps：
(1) processing mashing dispersant：Dispersant is added water and be beaten in the beating equipment with agitating device, is beaten dispersant
Addition is the 0.1~0.5% of content of titanium dioxide；
(2) slurry concentration is controlled：Into beating equipment add titanium dioxide first product, add water control slurry concentration be 600~
1200g/L；
(3) dispersed paste：Slurry obtained by step (2) is scattered 30~60 minutes, produce and be beaten scattered titanium dioxide
Slurry.
Wherein, step (1) beating equipment with agitating device is mashing tank.
Wherein, step (1) and step (2) described water are deionized water or distilled water.
Wherein, the compound that dispersant is polycarboxylate and silicate is beaten described in step (1), it is preferred that described poly-
Carboxylate is polycarboxylic acids sodium, and the silicate is sodium metasilicate.
Wherein, the compound proportion of polycarboxylate and silicate is by weight：Polycarboxylate:Silicate=9:1~1:9.
Preferred scope：Polycarboxylate:Silicate=9:1~1:1.
Most preferably it is worth：Polycarboxylate:Silicate=4:1.
Further, the titanium dioxide first product added in step (2) can be sulfuric acid process production or chloridising
Technique productions.
The beneficial effect of present invention mashing process for dispersing includes：
(1) dispersant is not nitrogenous and phosphorus for mashing, is conducive to environmental protection；
(2) acid or alkali regulation slurry pH value need not be added, good dispersion effect can be equally reached, simplify technique,
Reduce cost；
(3) beating consistency can be brought up to 600~1200g/L, wet-grinding efficiency and yield is improved, the damage of wet milling device is reduced
Consumption and energy consumption.
Embodiment
The embodiment of form, remakes further specifically to the above of the invention by the following examples
It is bright, illustrate but do not limit the present invention.
Present invention mashing process for dispersing realizes that the key being beaten to high-concentration titanium dioxide is to use polycarboxylate and silicon
The compound of hydrochlorate is used as mashing dispersant.It is below the experiment of screening mashing dispersant：By changing dispersant, disperseing
The Parameter Conditions such as agent ratio, dispersant dosage, slurry concentration carry out mashing experiment, and fixed mashing jitter time is 45 minutes, is surveyed
Determine slurry viscosity.
(1) deionized water or distilled water are added into the mashing tank with agitating device, starts stirring, is added into mashing tank
Dispersant is beaten, addition is in terms of content of titanium dioxide；
(2) toward addition titanium dioxide first product in mashing tank, then a certain amount of deionized water or distilled water are added, controls slurry
Concentration；
(3) it is slurry obtained by step (2) is scattered 45 minutes, produce and be beaten scattered high-concentration titanium dioxide slurry.
Parameter designing and it the results are shown in Table 1.
Table 1 is beaten parameter designing and viscosity measurements
| Example | Dispersant | Dispersive agent ratio | Dispersant dosage/% | Slurry concentration/(g/L) | Viscosity/cP |
| 1 | Polycarboxylic acids sodium | Nothing | 0.1 | 600 | 250 |
| 2 | Polycarboxylic acids sodium | Nothing | 0.3 | 900 | 315 |
| 3 | Polycarboxylic acids sodium | Nothing | 0.5 | 1200 | 382 |
| 4 | Sodium metasilicate | Nothing | 0.1 | 600 | 405 |
| 5 | Sodium metasilicate | Nothing | 0.3 | 900 | 410 |
| 6 | Sodium metasilicate | Nothing | 0.5 | 1200 | 420 |
| 7 | Calgon | Nothing | 0.1 | 600 | 320 |
| 8 | Calgon | Nothing | 0.3 | 900 | 351 |
| 9 | Calgon | Nothing | 0.5 | 1200 | 403 |
| 10 | Polycarboxylic acids sodium and sodium metasilicate | 9:1 | 0.3 | 900 | 135 |
| 11 | Polycarboxylic acids sodium and sodium metasilicate | 4:1 | 0.3 | 900 | 115 |
| 12 | Polycarboxylic acids sodium and sodium metasilicate | 1:1 | 0.3 | 900 | 150 |
| 13 | Polycarboxylic acids sodium and sodium metasilicate | 9:1 | 0.5 | 1200 | 158 |
| 14 | Polycarboxylic acids sodium and sodium metasilicate | 4:1 | 0.5 | 1200 | 122 |
| 15 | Polycarboxylic acids sodium and sodium metasilicate | 1:1 | 0.5 | 1200 | 180 |
| 16 | Polycarboxylic acids sodium and sodium metasilicate | 9:1 | 0.1 | 600 | 118 |
| 17 | Polycarboxylic acids sodium and sodium metasilicate | 4:1 | 0.1 | 600 | 105 |
| 18 | Polycarboxylic acids sodium and sodium metasilicate | 1:1 | 0.1 | 600 | 127 |
As it can be seen from table 1 the mashing effect that polycarboxylic acids sodium, sodium metasilicate or calgon make mashing dispersant is used alone
Fruit is not as polycarboxylic acids sodium and the beating resultses of sodium metasilicate compounding use.Mashing point is used as using polycarboxylic acids sodium and with sodium metasilicate compounding
Powder, beating resultses are good, can carry out high concentration mashing, and not nitrogenous and phosphorus is conducive to environmental protection, and need not additionally add acid or alkali
Adjust slurry pH value.
Claims (7)
1. the mashing process for dispersing of titanium dioxide, the described method comprises the following steps：
(1) processing mashing dispersant：Dispersant is added water and is beaten in the beating equipment with agitating device, and mashing dispersant is added
Measure as the 0.1~0.5% of content of titanium dioxide；
(2) slurry concentration is controlled：Into beating equipment add titanium dioxide first product, add water control slurry concentration be 600~
1200g/L；
(3) dispersed paste：Slurry obtained by step (2) is scattered 30~60 minutes, produce and be beaten scattered titania slurry；
Wherein described step (1) the mashing dispersant is the compound of polycarboxylate and silicate, and compound proportion is by weight
For：Polycarboxylate:Silicate=9:1~1:9.
2. the mashing process for dispersing of titanium dioxide according to claim 1, it is characterised in that：The polycarboxylate and silicic acid
The compound proportion of salt is by weight：Polycarboxylate:Silicate=9:1~1:1.
3. the mashing process for dispersing of titanium dioxide according to claim 2, it is characterised in that：The polycarboxylate and silicic acid
The compound proportion of salt is by weight：Polycarboxylate:Silicate=4:1.
4. the mashing process for dispersing of the titania slurry according to claim any one of 1-3, it is characterised in that：It is described poly-
Carboxylate is polycarboxylic acids sodium, and the silicate is sodium metasilicate.
5. the mashing process for dispersing of titanium dioxide according to claim 1, it is characterised in that：Added in the step (2)
Titanium dioxide first product using sulfuric acid process produce or chlorination process production.
6. the mashing process for dispersing of titanium dioxide according to claim 1, it is characterised in that：Step (1) the band stirring
The beating equipment of device is mashing tank.
7. the mashing process for dispersing of titanium dioxide according to claim 1, it is characterised in that：Step (1) and step (2) institute
Water is stated for deionized water or distilled water.
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| CN105921212B (en) * | 2016-06-23 | 2019-02-15 | 攀钢集团攀枝花钢铁研究院有限公司 | The method for reducing titania slurry viscosity |
| CN107400382B (en) * | 2017-08-23 | 2019-03-22 | 攀钢集团重庆钛业有限公司 | A kind of mashing dispersing method of titanium dioxide primary product |
| CN110988037A (en) * | 2019-11-20 | 2020-04-10 | 攀钢集团重庆钛业有限公司 | Method for detecting dispersion state of titanium dioxide |
| CN113088106A (en) * | 2021-04-06 | 2021-07-09 | 攀钢集团重庆钒钛科技有限公司 | Depolymerization dispersant and depolymerization dispersion method for titanium dioxide primary product |
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| US3847640A (en) * | 1973-03-26 | 1974-11-12 | A L Ind Inc | Titanium pigment slurries for preparation of latex-base coating compositions |
| JPS5895614A (en) * | 1981-12-03 | 1983-06-07 | Onahama Sakai Kagaku Kk | Preparation of titanium dioxide slurry |
| US5603411A (en) * | 1994-12-07 | 1997-02-18 | Engelhard Corporation | Method for separating mixture of finely divided minerals |
| CN101280128B (en) * | 2008-06-02 | 2011-08-17 | 深圳职业技术学院 | Anatase titanium dioxide type titanium white pulp and preparation thereof |
| CN102391689B (en) * | 2011-08-11 | 2013-05-22 | 四川龙蟒钛业股份有限公司 | Preparation method of high dispersing rutile product |
| CN104341800A (en) * | 2014-10-17 | 2015-02-11 | 中航长沙设计研究院有限公司 | Method for preparing titanium dioxide for polyester matting |
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Address after: 617063 Panzhihua Vanadium-Titanium Industrial Park, Sichuan Province Patentee after: PANGANG GROUP TITANIUM INDUSTRY Co.,Ltd. Address before: 617063 No. 1491, East Section of Jinshajiang Avenue, Panzhihua City, Sichuan Province Patentee before: PANGANG GROUP TITANIUM INDUSTRY Co.,Ltd. |
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Effective date of registration: 20220728 Address after: 401320 No.2 Zitong Road, maliuzui Town, Banan District, Chongqing Patentee after: CHONGQING TITANIUM INDUSTRY CO., LTD OF PANGANG Group Address before: 617063 vanadium and Titanium Industrial Park, Panzhihua City, Sichuan Province Patentee before: PANGANG GROUP TITANIUM INDUSTRY Co.,Ltd. |