CN104176776A - Hydrolysis method of titanyl sulfate solution with high concentration and low ferrous and titanium ratio - Google Patents
Hydrolysis method of titanyl sulfate solution with high concentration and low ferrous and titanium ratio Download PDFInfo
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Abstract
The invention belongs to the technical field of titanium dioxide production, and particularly relates to a hydrolysis method of a titanyl sulfate solution with high concentration and low ferrous and titanium ratio. The method is characterized by comprises the following steps: first rapidly mixing a concentrated titanium solution with NaOH solution at a temperature of 80-85 DEG C to complete preparation of hydrolysis crystal seed; then adding the crystal seed in the volume 2-3% of the hydrolysis titanium liquid into the concentrated titanium liquid preheated to 90-96 DEG C, stirring evenly, and heating with steam of 0.4 MPa to a boiling state; stopping stirring after appearance of grayed points, and closing a steam valve; mixing again 30 min later, and opening the steam valve to heat the material to a boiling state again; maintaining a micro boiling state for 180 min under micro pressure of 200-500 pa, so as to finish hydrolysis. The process has the advantages of simpleness, stable product quality and high hydrolysis rate.
Description
Technical field: the invention belongs to titanium white production technical field, be specifically related to a kind of high density, low iron titanium ratio titanyl sulfate solution method for hydrolysis.
Background technology: at present, the production technique of domestic titanium dioxide adopts sulfuric acid process more, wherein, hydrolysis process mainly comprises two kinds, one is automatic growing crystal species hydrolysis process, another kind is plus seed hydrolysis process, and most of Producing Titanium Dioxide enterprise adopts plus seed hydrolysis process, forms crystal seed with sodium hydroxide solution and titanium liquid.And large multiple enterprises adopts ilmenite acidolysis technique to prepare titanium liquid, the titanium concentration of preparation is on the low side, iron titanium ratio is higher, must be again through Crystallization Procedure, ferrously separate, enrichment process process after titanium concentration and iron titanium ratio just can reach processing requirement.Its shortcoming one is complex process, the 2nd, and between product batches, quality fluctuation is larger, and quality is unstable, and the 3rd, after hydrolysis, in metatitanic acid, contain a large amount of ferrous ions, after hydrolysis, percent hydrolysis is on the low side.
Summary of the invention: the object of this invention is to provide a kind of technique simple, constant product quality, the high density that percent hydrolysis is high, low iron titanium ratio titanyl sulfate solution method for hydrolysis.
Technical scheme of the present invention is: a kind of high density, low iron titanium ratio titanyl sulfate solution method for hydrolysis, is characterized in that: comprise following processing step:
(1) the NaOH solution that is, 8～10% by dense titanium liquid and the percentage concentration of total titanium content 220-240g/l, iron titanium ratio 0.15-0.16 mixes rapidly at temperature 80-85 DEG C, and being warming up to 90-96 DEG C, the stability of system reaches 100-140ml and has completed the preparation of hydrolysis crystal seed;
(2), being the long-pending 2-3% of Hydrolysis of Titanium liquid by volume, above-mentioned crystal seed is put into the dense titanium liquid that is preheated in advance 90-96 DEG C of temperature, after stirring, is discharged in hydrolyzer, the steam direct heating that is 0.4MPa with pressure is to seething with excitement;
(3), there is stopping stirring after change ash point steam off valve;
(4), after 30 minutes, stir again, open steam valve simultaneously the heating material in hydrolyzer is made it to boiling again after 20 minutes;
(5), steam off valve, regulate little steam valve and automatic pressure maintaining device, be under 200-500pa in minute-pressure, keep slight boiling condition after 180 minutes, can complete hydrolysis.
The reasonable technical scheme of the present invention is: a kind of high density, low iron titanium ratio titanyl sulfate solution method for hydrolysis, is characterized in that: comprise following processing step:
(1) the NaOH solution that is, 8～10% by dense titanium liquid and the percentage concentration of total titanium content 225-235g/l, iron titanium ratio 0.15-0.16 mixes rapidly at temperature 80-85 DEG C, and being warming up to 90-96 DEG C, the stability of system reaches the preparation that has completed hydrolysis crystal seed after 110-130ml;
(2), being the long-pending 2-3% of Hydrolysis of Titanium liquid by volume, above-mentioned crystal seed is put into the dense titanium liquid that is preheated in advance 90-96 DEG C of temperature, after stirring, is discharged in hydrolyzer, the steam direct heating that is 0.4MPa with pressure is to seething with excitement;
(3), there is stopping stirring after change ash point steam off valve;
(4), after 30 minutes, stir again, open steam valve simultaneously the heating material in hydrolyzer is made it to boiling again after 20 minutes;
(5), steam off valve, regulate little steam valve and automatic pressure maintaining device, be under 300-400pa in minute-pressure, keep slight boiling condition after 180 minutes, can complete hydrolysis.
Best-of-breed technology scheme of the present invention is: a kind of high density, low iron titanium ratio titanyl sulfate solution method for hydrolysis, is characterized in that: comprise following processing step:
(1) the NaOH solution that is, 9% by dense titanium liquid and the percentage concentration of total titanium content 230g/l, iron titanium ratio 0.155 mixes rapidly in 4 minutes at 82.5 DEG C of temperature, and being warming up to 93 DEG C, the stability of system reaches the preparation that has completed hydrolysis crystal seed after 120ml;
(2), being Hydrolysis of Titanium liquid long-pending 2.5% by volume, above-mentioned crystal seed is put into the dense titanium liquid that is preheated in advance 93 DEG C of temperature, after stirring, is discharged in hydrolyzer, the steam direct heating that is 0.4MPa with pressure is to seething with excitement;
(3), there is stopping stirring after change ash point steam off valve;
(4), after 30 minutes, stir again, open steam valve simultaneously the heating material in hydrolyzer is made it to boiling again after 20 minutes;
(5), steam off valve, regulate little steam valve and automatic pressure maintaining device, be under 350pa in minute-pressure, keep slight boiling condition after 180 minutes, can complete hydrolysis.
Owing to adopting technique scheme, reasonably crystal seed preparation method and adding proportion, make to be hydrolyzed rear metatitanic acid size distribution even; Because the maintenance slight boiling condition time that hydrolysis is last is long, percent hydrolysis is up to 96%, and total titanium content of solution is higher, equipment capacity has been improved greatly, thereby it is simple to have technique, constant product quality, the advantage that percent hydrolysis is high.
Embodiment: further illustrate technical scheme of the present invention below in conjunction with specific embodiment.
Embodiment 1: a kind of high density, low iron titanium ratio titanyl sulfate solution method for hydrolysis, is characterized in that: comprise following processing step:
(1), the NaOH solution that is 10% by dense titanium liquid and the percentage concentration of total titanium content 240g/l, iron titanium ratio 0.15 mixes rapidly at 80 DEG C of temperature, and is warming up to 96 DEG C, the stability of system reaches 100ml and has completed the preparation of hydrolysis crystal seed;
(2), being Hydrolysis of Titanium liquid long-pending 3% by volume, above-mentioned crystal seed is put into the dense titanium liquid that is preheated in advance 90 DEG C of temperature, after stirring, is discharged in hydrolyzer, the steam direct heating that is 0.4MPa with pressure is to seething with excitement;
(3), there is stopping stirring after change ash point steam off valve;
(4), after 30 minutes, stir again, open steam valve simultaneously the heating material in hydrolyzer is made it to boiling again after 20 minutes;
(5), steam off valve, regulate little steam valve and automatic pressure maintaining device, be under 500pa in minute-pressure, keep slight boiling condition after 180 minutes, can complete hydrolysis.
Embodiment 2: a kind of high density, low iron titanium ratio titanyl sulfate solution method for hydrolysis, is characterized in that: comprise following processing step:
(1), the NaOH solution that is 8% by dense titanium liquid and the percentage concentration of total titanium content 220g/l, iron titanium ratio 0.16 mixes rapidly at 85 DEG C of temperature, and is warming up to 90 DEG C, the stability of system reaches 140ml and has completed the preparation of hydrolysis crystal seed;
(2), being Hydrolysis of Titanium liquid long-pending 2% by volume, above-mentioned crystal seed is put into the dense titanium liquid that is preheated in advance 96 DEG C of temperature, after stirring, is discharged in hydrolyzer, the steam direct heating that is 0.4MPa with pressure is to seething with excitement;
(3), there is stopping stirring after change ash point steam off valve;
(4), after 30 minutes, stir again, open steam valve simultaneously the heating material in hydrolyzer is made it to boiling again after 20 minutes;
(5), steam off valve, regulate little steam valve and automatic pressure maintaining device, be under 200pa in minute-pressure, keep slight boiling condition after 180 minutes, can complete hydrolysis.
Embodiment 3: a kind of high density, low iron titanium ratio titanyl sulfate solution method for hydrolysis, is characterized in that: comprise following processing step:
(1), the NaOH solution that is 10% by dense titanium liquid and the percentage concentration of total titanium content 235g/l, iron titanium ratio 0.15 mixes rapidly at 80 DEG C of temperature, and is warming up to 96 DEG C, the stability of system reaches the preparation that has completed hydrolysis crystal seed after 110ml;
(2), being Hydrolysis of Titanium liquid long-pending 3% by volume, above-mentioned crystal seed is put into the dense titanium liquid that is preheated in advance 90 DEG C of temperature, after stirring, is discharged in hydrolyzer, the steam direct heating that is 0.4MPa with pressure is to seething with excitement;
(3), there is stopping stirring after change ash point steam off valve;
(4), after 30 minutes, stir again, open steam valve simultaneously the heating material in hydrolyzer is made it to boiling again after 20 minutes;
(5), steam off valve, regulate little steam valve and automatic pressure maintaining device, be under 400pa in minute-pressure, keep slight boiling condition after 180 minutes, can complete hydrolysis.
Embodiment 4: a kind of high density, low iron titanium ratio titanyl sulfate solution method for hydrolysis, is characterized in that: comprise following processing step:
(1), the NaOH solution that is 8% by dense titanium liquid and the percentage concentration of total titanium content 225g/l, iron titanium ratio 0.16 mixes rapidly at 85 DEG C of temperature, and is warming up to 90 DEG C, the stability of system reaches the preparation that has completed hydrolysis crystal seed after 130ml;
(2), being Hydrolysis of Titanium liquid long-pending 2% by volume, above-mentioned crystal seed is put into the dense titanium liquid that is preheated in advance 96 DEG C of temperature, after stirring, is discharged in hydrolyzer, the steam direct heating that is 0.4MPa with pressure is to seething with excitement;
(3), there is stopping stirring after change ash point steam off valve;
(4), after 30 minutes, stir again, open steam valve simultaneously the heating material in hydrolyzer is made it to boiling again after 20 minutes;
(5), steam off valve, regulate little steam valve and automatic pressure maintaining device, be under 300pa in minute-pressure, keep slight boiling condition after 180 minutes, can complete hydrolysis.
Embodiment 5: a kind of high density, low iron titanium ratio titanyl sulfate solution method for hydrolysis, is characterized in that: comprise following processing step:
(1) the NaOH solution that is, 9% by dense titanium liquid and the percentage concentration of total titanium content 230g/l, iron titanium ratio 0.155 mixes rapidly in 4 minutes at 82.5 DEG C of temperature, and being warming up to 93 DEG C, the stability of system reaches the preparation that has completed hydrolysis crystal seed after 120ml;
(2), being Hydrolysis of Titanium liquid long-pending 2.5% by volume, above-mentioned crystal seed is put into the dense titanium liquid that is preheated in advance 93 DEG C of temperature, after stirring, is discharged in hydrolyzer, the steam direct heating that is 0.4MPa with pressure is to seething with excitement;
(3), there is stopping stirring after change ash point steam off valve;
(4), after 30 minutes, stir again, open steam valve simultaneously the heating material in hydrolyzer is made it to boiling again after 20 minutes;
(5), steam off valve, regulate little steam valve and automatic pressure maintaining device, be under 350pa in minute-pressure, keep slight boiling condition after 180 minutes, can complete hydrolysis.
After hydrolysis, metatitanic acid size distribution is as following table:
| ? | D10um | D50um | D90um | Span um |
| Embodiment 1 | 0.255 | 0.347 | 0.672 | 1.200 |
| Embodiment 2 | 0.254 | 0.346 | 0.733 | 1.385 |
| Embodiment 3 | 0.252 | 0.336 | 0.637 | 1.146 |
| Embodiment 4 | 0.238 | 0.319 | 0.611 | 1.170 |
| Embodiment 5 | 0.252 | 0.333 | 0.621 | 1.108 |
Experimental data proves, owing to adopting above-mentioned technique, is hydrolyzed rear size distribution even; Thereby improved the quality of metatitanic acid after water, and total titanium concentration is high, and percent hydrolysis is high, in improving equipment capacity 20%-25%, reduces energy consumption 8-10%.
Claims (3)
1. high density, a low iron titanium ratio titanyl sulfate solution method for hydrolysis, is characterized in that: comprise following processing step:
(1) the NaOH solution that is, 8～10% by dense titanium liquid and the percentage concentration of total titanium content 220-240g/l, iron titanium ratio 0.15-0.16 mixes rapidly at temperature 80-85 DEG C, and being warming up to 90-96 DEG C, the stability of system reaches 100-140ml and has completed the preparation of hydrolysis crystal seed;
(2), being the long-pending 2-3% of Hydrolysis of Titanium liquid by volume, above-mentioned crystal seed is put into the dense titanium liquid that is preheated in advance 90-96 DEG C of temperature, after stirring, is discharged in hydrolyzer, the steam direct heating that is 0.4MPa with pressure is to seething with excitement;
(3), there is stopping stirring after change ash point steam off valve;
(4), after 30 minutes, stir again, open steam valve simultaneously the heating material in hydrolyzer is made it to boiling again after 20 minutes;
(5), steam off valve, regulate little steam valve and automatic pressure maintaining device, be under 200-500pa in minute-pressure, keep slight boiling condition after 180 minutes, can complete hydrolysis.
2. by a kind of high density claimed in claim 1, low iron titanium ratio titanyl sulfate solution method for hydrolysis, it is characterized in that: comprise following processing step:
(1) the NaOH solution that is, 8～10% by dense titanium liquid and the percentage concentration of total titanium content 225-235g/l, iron titanium ratio 0.15-0.16 mixes rapidly at temperature 80-85 DEG C, and being warming up to 90-96 DEG C, the stability of system reaches the preparation that has completed hydrolysis crystal seed after 110-130ml;
(2), being the long-pending 2-3% of Hydrolysis of Titanium liquid by volume, above-mentioned crystal seed is put into the dense titanium liquid that is preheated in advance 90-96 DEG C of temperature, after stirring, is discharged in hydrolyzer, the steam direct heating that is 0.4MPa with pressure is to seething with excitement;
(3), there is stopping stirring after change ash point steam off valve;
(4), after 30 minutes, stir again, open steam valve simultaneously the heating material in hydrolyzer is made it to boiling again after 20 minutes;
(5), steam off valve, regulate little steam valve and automatic pressure maintaining device, be under 300-400pa in minute-pressure, keep slight boiling condition after 180 minutes, can complete hydrolysis.
3. by a kind of high density, low iron titanium ratio titanyl sulfate solution method for hydrolysis described in claim 1 or 2, it is characterized in that: comprise following processing step:
(1) the NaOH solution that is, 9% by dense titanium liquid and the percentage concentration of total titanium content 230g/l, iron titanium ratio 0.155 mixes rapidly in 4 minutes at 82.5 DEG C of temperature, and being warming up to 93 DEG C, the stability of system reaches the preparation that has completed hydrolysis crystal seed after 120ml;
(2), being Hydrolysis of Titanium liquid long-pending 2.5% by volume, above-mentioned crystal seed is put into the dense titanium liquid that is preheated in advance 93 DEG C of temperature, after stirring, is discharged in hydrolyzer, the steam direct heating that is 0.4MPa with pressure is to seething with excitement;
(3), there is stopping stirring after change ash point steam off valve;
(4), after 30 minutes, stir again, open steam valve simultaneously the heating material in hydrolyzer is made it to boiling again after 20 minutes;
(5), steam off valve, regulate little steam valve and automatic pressure maintaining device, under minute-pressure 350pa, keep slight boiling condition after 180 minutes, can complete hydrolysis.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105883913A (en) * | 2014-09-18 | 2016-08-24 | 攀枝花新中钛钒钛技术研发有限公司 | Method for external seed normal pressure introduced hydrolysis of high-concentration titaniferous solution |
| CN106241866A (en) * | 2016-08-30 | 2016-12-21 | 襄阳龙蟒钛业有限公司 | A kind of method using high concentration plus seed to prepare titanium dioxide |
| CN106430300A (en) * | 2016-08-30 | 2017-02-22 | 襄阳龙蟒钛业有限公司 | Alkali-neutralization seed crystal external addition method for producing titanium dioxide |
| CN107640785A (en) * | 2017-11-10 | 2018-01-30 | 广西顺风钛业有限公司 | A kind of preparation method of plastic color master grain titanium dioxide |
| CN108545772A (en) * | 2018-05-04 | 2018-09-18 | 广西金茂钛业有限公司 | A kind of preparation method of colorant titanium dioxide additional hydrolyzing seed crystal |
| CN110028100A (en) * | 2019-05-21 | 2019-07-19 | 四川大学 | The preparation method of the method for Production By Sulfuric Acid Process rutile titanium white and double-effect seed crystal used |
| CN110554715A (en) * | 2019-10-25 | 2019-12-10 | 攀钢集团攀枝花钢铁研究院有限公司 | RBF neural network-based PID control method for hydrolysis process temperature of titanyl sulfate plus seed crystal |
| CN114162857A (en) * | 2021-12-10 | 2022-03-11 | 长沙华希新材料有限公司 | Titanium dioxide for hard alloy and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101284680A (en) * | 2008-05-05 | 2008-10-15 | 攀钢集团攀枝花钢铁研究院有限公司 | Hydrolyzing method for preparing titanium white |
| CN102502809A (en) * | 2011-10-27 | 2012-06-20 | 攀钢集团研究院有限公司 | Hydrolysis method for preparing rutile titanium dioxide |
| CN103043715A (en) * | 2012-12-19 | 2013-04-17 | 攀枝花鼎星钛业有限公司 | Production method of titanium dioxide powder |
| CN103086425A (en) * | 2011-11-07 | 2013-05-08 | 攀枝花鼎星钛业有限公司 | Method for producing titanium dioxide by using titanium liquid with low content of total titanium and high iron-titanium ratio |
-
2013
- 2013-05-20 CN CN201310207589.8A patent/CN104176776A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101284680A (en) * | 2008-05-05 | 2008-10-15 | 攀钢集团攀枝花钢铁研究院有限公司 | Hydrolyzing method for preparing titanium white |
| CN102502809A (en) * | 2011-10-27 | 2012-06-20 | 攀钢集团研究院有限公司 | Hydrolysis method for preparing rutile titanium dioxide |
| CN103086425A (en) * | 2011-11-07 | 2013-05-08 | 攀枝花鼎星钛业有限公司 | Method for producing titanium dioxide by using titanium liquid with low content of total titanium and high iron-titanium ratio |
| CN103043715A (en) * | 2012-12-19 | 2013-04-17 | 攀枝花鼎星钛业有限公司 | Production method of titanium dioxide powder |
Non-Patent Citations (2)
| Title |
|---|
| 孙爱华等: ""TiCl4自生晶种水解法制备纳米二氧化钛"", 《中国粉体技术》, vol. 14, no. 6, 31 December 2008 (2008-12-31), pages 44 - 48 * |
| 杜长山: ""钛液水解粒子的粒径与影响因素的回归关系"", 《无机盐工业》, vol. 35, no. 4, 31 July 2003 (2003-07-31), pages 24 - 27 * |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105883913A (en) * | 2014-09-18 | 2016-08-24 | 攀枝花新中钛钒钛技术研发有限公司 | Method for external seed normal pressure introduced hydrolysis of high-concentration titaniferous solution |
| CN106241866A (en) * | 2016-08-30 | 2016-12-21 | 襄阳龙蟒钛业有限公司 | A kind of method using high concentration plus seed to prepare titanium dioxide |
| CN106430300A (en) * | 2016-08-30 | 2017-02-22 | 襄阳龙蟒钛业有限公司 | Alkali-neutralization seed crystal external addition method for producing titanium dioxide |
| CN106430300B (en) * | 2016-08-30 | 2018-04-17 | 襄阳龙蟒钛业有限公司 | A kind of method that alkali neutralization plus seed prepares titanium dioxide |
| CN106241866B (en) * | 2016-08-30 | 2018-08-07 | 襄阳龙蟒钛业有限公司 | A method of preparing titanium dioxide using plus seed |
| CN107640785A (en) * | 2017-11-10 | 2018-01-30 | 广西顺风钛业有限公司 | A kind of preparation method of plastic color master grain titanium dioxide |
| CN108545772A (en) * | 2018-05-04 | 2018-09-18 | 广西金茂钛业有限公司 | A kind of preparation method of colorant titanium dioxide additional hydrolyzing seed crystal |
| CN110028100A (en) * | 2019-05-21 | 2019-07-19 | 四川大学 | The preparation method of the method for Production By Sulfuric Acid Process rutile titanium white and double-effect seed crystal used |
| CN110028100B (en) * | 2019-05-21 | 2021-11-12 | 四川大学 | Method for producing rutile titanium white by sulfuric acid process and preparation method of used double-effect seed crystal |
| CN110554715A (en) * | 2019-10-25 | 2019-12-10 | 攀钢集团攀枝花钢铁研究院有限公司 | RBF neural network-based PID control method for hydrolysis process temperature of titanyl sulfate plus seed crystal |
| CN114162857A (en) * | 2021-12-10 | 2022-03-11 | 长沙华希新材料有限公司 | Titanium dioxide for hard alloy and preparation method thereof |
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Application publication date: 20141203 |