CN113387383A - Production method of high-fluidity titanium dioxide flash-dried material - Google Patents
Production method of high-fluidity titanium dioxide flash-dried material Download PDFInfo
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- CN113387383A CN113387383A CN202110563968.5A CN202110563968A CN113387383A CN 113387383 A CN113387383 A CN 113387383A CN 202110563968 A CN202110563968 A CN 202110563968A CN 113387383 A CN113387383 A CN 113387383A
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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
- C01G23/04—Oxides; Hydroxides
- C01G23/047—Titanium dioxide
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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
- C01G23/04—Oxides; Hydroxides
- C01G23/047—Titanium dioxide
- C01G23/08—Drying; Calcining ; After treatment of titanium oxide
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
Abstract
The invention relates to the technical field of titanium dioxide production, in particular to a production method of a high-fluidity titanium dioxide flash-dried material, which comprises the steps of continuously circulating spray water for treating flash-dried material steam-powder tail gas, and enriching a water-soluble organic treating agent in the spray water until the consumption of chemical oxygen in the spray water is more than or equal to 10000 ppm; and (3) transferring the spray water with the chemical oxygen consumption of more than or equal to 10000ppm into a storage tank, pumping the spray water into a three-washing filter press in the production process of the titanium dioxide flash dry material, and infiltrating three-washing cakes after three-washing in the three-washing filter press. According to the invention, the spray water for treating the flash-dried material gas-powder tail gas is continuously circulated, so that the water-soluble organic treating agent in the spray water is enriched to the chemical oxygen consumption of more than or equal to 10000ppm, and the spray water with the chemical oxygen consumption of more than or equal to 10000ppm soaks three washed cakes in a three-washing filter press after three washing, thereby increasing the flowability of the flash-dried material, improving the product quality and ensuring the application performance of the product.
Description
Technical Field
The invention relates to the technical field of titanium dioxide production, in particular to a production method of a high-fluidity titanium dioxide flash drying material.
Background
The titanium dioxide flash dry material is an intermediate product in the titanium dioxide preparation process, and in the prior art, the titanium dioxide flash dry material is not organically treated, has poor fluidity and is easy to bridge and block at a discharge port below a flash drying bin hopper. When the flash dry material is conveyed into the steam powder machine through the screw rod, the fluctuation of the steam powder feeding amount is large, the product quality fluctuation is caused, the dispersibility is poor, and the application performance is influenced.
In addition, in the prior art, according to the amount of the water-soluble organic treating agent added to the steam powder machine and the amount of the water-soluble organic treating agent remained in the titanium dioxide finally, the C% accounting of the finished titanium dioxide shows that the amount of the water-soluble organic treating agent lost along with the flash dry material steam powder tail gas is 15-25%, so that the flash dry material steam powder tail gas (after passing through a bag filter) still contains more water-soluble organic treating agent. The sewage generated in the subsequent spraying treatment process of the existing flash dry material gas-powder tail gas is used for other procedures or is directly discharged, so that the recycling of a water-soluble organic treating agent is not facilitated, the production cost is increased, and simultaneously, the problem of overhigh COD (Chemical Oxygen Demand) of external drainage is also caused, and the sustainable development and the environmental protection are not facilitated. In addition, the temperature of the flash dry material gas-powder tail gas is 100-200 ℃, the waste heat loss is large, and the waste heat is to be recycled.
Disclosure of Invention
The invention aims to overcome the defects and provides a production method of a high-fluidity titanium dioxide flash drying material, which comprises the following steps:
(1) continuously circulating spray water for treating flash dry material gas-powder tail gas to realize the enrichment of water-soluble organic treating agent in the spray water until the consumption of chemical oxygen in the spray water is more than or equal to 10000 ppm;
(2) and (3) transferring the spray water with the chemical oxygen consumption of more than or equal to 10000ppm into a storage tank, pumping the spray water into a three-washing filter press in the production process of the titanium dioxide flash dry material, and infiltrating three-washing cakes after three-washing in the three-washing filter press.
Preferably, the water-soluble organic treating agent is trimethylolpropane or trimethylolethane, so that organic coating of titanium dioxide can be realized, and the titanium dioxide is convenient to recover and enrich.
Preferably, increase the heat exchanger that is used for cooling spray water in spray water continuous cycle's conveying line, the coolant of heat exchanger adopts demineralized water or demineralized water, is favorable to dodging the cooling of dry material vapour powder tail gas and the enrichment of water-soluble organic treating agent, helps realizing dodging the recycle of waste heat in the dry material vapour powder tail gas simultaneously.
Preferably, the desalted water or softened water after heat exchange is introduced into the three-washing filter press by pumping to be used as the three-washing water of the three-washing filter press, and the water temperature of the three-washing water can be fully improved by utilizing the waste heat in the flash dry material steam powder tail gas so as to ensure the three-washing effect of the three-washing filter press.
Compared with the prior art, the invention has the beneficial effects that:
by continuously circulating the spray water for treating the flash dry material gas-powder tail gas, the water-soluble organic treating agent in the spray water is enriched to the chemical oxygen consumption of more than or equal to 10000ppm, and when the three-washing process of the titanium dioxide flash dry material is finished, the spray water with the chemical oxygen consumption of more than or equal to 10000ppm soaks three-washed cakes in a three-washing filter press, so that the flowability of the flash dry material is increased, the product quality is improved, and the application performance of the product is ensured.
Detailed Description
The present invention will be further described with reference to specific examples, which are illustrative of the invention and are not to be construed as limiting the invention.
Examples
The invention provides a production method of a high-fluidity titanium dioxide flash drying material, which comprises the following steps:
(1) continuously circulating spray water for treating flash dry material gas-powder tail gas to realize the enrichment of water-soluble organic treating agent in the spray water until the consumption of chemical oxygen in the spray water is more than or equal to 10000 ppm; the water-soluble organic treating agent is trimethylolpropane or trimethylolethane, can realize organic coating of titanium dioxide, and is convenient to recover and enrich. Increase the shell and tube heat exchanger that is used for cooling spray water in spray water continuous cycle's conveying pipeline, the coolant of shell and tube heat exchanger adopts demineralized water or demineralized water, is favorable to dodging the cooling of drier vapour powder tail gas and the enrichment of water-soluble organic treating agent, helps realizing dodging the recycle of waste heat in the drier vapour powder tail gas simultaneously. The desalted water or softened water after heat exchange is pumped into a three-washing filter press to be used as three-washing water of the three-washing filter press, and the water temperature of the three-washing water can be improved by fully utilizing the waste heat in the flash dry material steam powder tail gas, so that the three-washing effect of the three-washing filter press is ensured.
(2) And (3) transferring the spray water with the chemical oxygen consumption of more than or equal to 10000ppm into a storage tank, pumping the spray water into a three-washing filter press in the production process of the titanium dioxide flash dry material, and infiltrating three-washing cakes after three-washing in the three-washing filter press.
By continuously circulating the spray water for treating the flash dry material gas-powder tail gas, the water-soluble organic treating agent in the spray water is enriched to the chemical oxygen consumption of more than or equal to 10000ppm, and when the three-washing process of the titanium dioxide flash dry material is finished, the spray water with the chemical oxygen consumption of more than or equal to 10000ppm soaks three-washed cakes in a three-washing filter press, so that the flowability of the flash dry material is increased, the product quality is improved, and the application performance of the product is ensured.
After comparative laboratory flowability tests of flash dry materials prepared by the improvement of the present invention and flash dry materials prepared in the prior art, the results are shown in the following table:
flow test result comparison table
The comparative test adopts a single screw feeder, and simulates workshop screw conveying, and the flash drying material prepared by the invention has obviously increased fluidity as can be seen from the table above.
The technical solution of the present invention is not limited to the limitations of the above specific embodiments, and all technical modifications made according to the technical solution of the present invention fall within the protection scope of the present invention.
Claims (4)
1. A production method of a high-fluidity titanium dioxide flash drying material is characterized by comprising the following steps:
(1) continuously circulating spray water for treating flash dry material gas-powder tail gas to realize the enrichment of water-soluble organic treating agent in the spray water until the consumption of chemical oxygen in the spray water is more than or equal to 10000 ppm;
(2) and (3) transferring the spray water with the chemical oxygen consumption of more than or equal to 10000ppm into a storage tank, pumping the spray water into a three-washing filter press in the production process of the titanium dioxide flash dry material, and infiltrating three-washing cakes after three-washing in the three-washing filter press.
2. The production method of the high-fluidity titanium dioxide flash drying material according to claim 1, which is characterized by comprising the following steps: the water-soluble organic treating agent is trimethylolpropane or trimethylolethane.
3. The production method of the high-fluidity titanium dioxide flash drying material according to claim 1, which is characterized by comprising the following steps: and a heat exchanger for cooling the spray water is additionally arranged in a conveying pipeline for continuously circulating the spray water, and a cooling medium of the heat exchanger adopts desalted water or softened water.
4. The production method of the high-fluidity titanium dioxide flash drying material according to claim 3, which is characterized by comprising the following steps: the desalted water or softened water after heat exchange is pumped into a three-washing filter press to be used as three-washing water of the three-washing filter press.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110563968.5A CN113387383B (en) | 2021-05-24 | 2021-05-24 | Production method of high-fluidity titanium dioxide flash drying material |
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| CN202110563968.5A CN113387383B (en) | 2021-05-24 | 2021-05-24 | Production method of high-fluidity titanium dioxide flash drying material |
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| CN113387383A true CN113387383A (en) | 2021-09-14 |
| CN113387383B CN113387383B (en) | 2022-10-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116041982A (en) * | 2022-12-15 | 2023-05-02 | 宜宾天原海丰和泰有限公司 | Inorganic coating method for titanium dioxide |
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2021
- 2021-05-24 CN CN202110563968.5A patent/CN113387383B/en active Active
Patent Citations (14)
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| US3650695A (en) * | 1969-08-28 | 1972-03-21 | Ppg Industries Inc | Method for treating titanium dioxide reactor discharge containing products of nitrogen fixation |
| CA2001751A1 (en) * | 1988-10-28 | 1990-04-28 | Michael J. Hollitt | Recovery of titanium values from minerals |
| WO2002094443A2 (en) * | 2001-05-23 | 2002-11-28 | E.I. Du Pont De Nemours And Company | High pressure media and method of creating ultra-fine particles |
| WO2006051061A1 (en) * | 2004-11-11 | 2006-05-18 | Basell Poliolefine Italia S.R.L. | Preparation of tio2 powders from a waste liquid containing titanium compounds |
| FI20070618A0 (en) * | 2007-08-16 | 2007-08-16 | Kemira Pigments Oy | Process for the preparation of a highly dispersible microcrystalline titanium dioxide product, the product and its use |
| CN104356692A (en) * | 2014-09-23 | 2015-02-18 | 安徽金星钛白（集团）有限公司 | Preparation method of high-fluidity TiO2 and organic surface treatment mechanism thereof |
| CN105985667A (en) * | 2015-02-02 | 2016-10-05 | 云南新立有色金属有限公司 | Chlorination-method titanium dioxide tail gas reutilization method and titanium dioxide coated product |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116041982A (en) * | 2022-12-15 | 2023-05-02 | 宜宾天原海丰和泰有限公司 | Inorganic coating method for titanium dioxide |
| CN116041982B (en) * | 2022-12-15 | 2024-05-31 | 宜宾天原海丰和泰有限公司 | Inorganic coating method for titanium dioxide |
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| CN113387383B (en) | 2022-10-28 |
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Effective date of registration: 20220929 Address after: 618000 Xinshi Industrial Development Zone, Mianzhu City, Deyang City, Sichuan Province Applicant after: Longbai Sichuan Titanium Co.,Ltd. Applicant after: Gansu baililian Chemical Co.,Ltd. Address before: 618000 Xinshi Industrial Development Zone, Mianzhu City, Deyang City, Sichuan Province Applicant before: Longbai Sichuan Titanium Co.,Ltd. |
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