CN1544336A - Chemical processing method for promotion of titanium dioxide product quality - Google Patents
Chemical processing method for promotion of titanium dioxide product quality Download PDFInfo
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- CN1544336A CN1544336A CNA2003101123833A CN200310112383A CN1544336A CN 1544336 A CN1544336 A CN 1544336A CN A2003101123833 A CNA2003101123833 A CN A2003101123833A CN 200310112383 A CN200310112383 A CN 200310112383A CN 1544336 A CN1544336 A CN 1544336A
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- titanium dioxide
- acid solution
- hydrofluoric acid
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- titanium
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Abstract
A chemical processing method for improving titanium dioxide product grade, wherein hydrofluoric acid solution is utilized for conducting acid solution erosion disposing to titanium dioxide material, then purification and dehydration are carried out. By utilizing the distinguishing feature of selectivity to erosion of titanium dioxide material by the hydrofluoric acid, impurity substance can be removed and titanium dioxide product grade can be improved.
Description
Technical field
The present invention relates to a kind of purification processing method of titaniferous materials, particularly a kind of chemical treatment method that improves the titanium dioxide product grade.
Background technology
Usually the production process of titanium ore generally adopts ore-dressing technique methods such as fragmentation, screening, gravity treatment, magnetic separation, electric separation and flotation, but owing to be subjected to the restriction of ore quality and ore-dressing technique method, often impurity composition that can only trip is high separates, and some and titanium dioxide is chemical combination attitude impurity such as silicon oxide, calcium oxide etc. can't be removed at all, thereby cause the finished product grade of titanium dioxide to be difficult to reach the select quality requirement, a small amount of select quality cost of selecting is also very high.Therefore can't satisfy part special industry demand, as the low silicon rutile of metallurgy industry requirement, the ferrohastingsite that ceramic industry requires etc.
For improving the content of titanium dioxide, people adopt the chemical purification method, and titanium ore or the titanium ore after above-mentioned ore-dressing technique method is handled are carried out lixiviate, and as sulfuric acid process and salt acid system etc., these methods are all on the books on relevant document and patent document.Provide " a kind of manufacture method of rutile type high-purity titanium dioxide " as patent application 96117814.0, adopt special sulfuric acid process to carry out acidolysis, technologies such as leaching is reduced, and the sedimentation filtering for crystallizing is separated, the pulverizing of hydrolysed filtrate washing drying and calcining and special auxiliary agent are made.Its advantage is; Production cost is very low, and the product purity of production is very high, reach more than 99.90%; Patent application 98113128.X provides a kind of " preparation of titanic-schorl type titanium white by hydrochloric-acid process ", in the reactor of salt tolerant acid, add dilute hydrochloric acid, in the presence of the metatitanic acid hydrolysis crystal seed, add ilmenite and reductive agent simultaneously through pulverizing, holding temperature is at 108～110 ℃, in the whole process of ilmenite decomposition and metatitanic acid hydrolysis, the existence that keeps micro-reductive agent, decompose and hydrolysis end after-filtration, metatitanic acid is separated with mother liquor, and metatitanic acid is washed, and adopts the method undecomposed mineral that granularity in the metatitanic acid is big slightly of gravity concentration to separate, add HF then with the SiO#-[2 in the metatitanic acid] remove, metatitanic acid is bleached with salt and is handled then, at last 850～900 ℃ of calcinings, and the Rutile type Titanium Dioxide of the approaching or suitable inward of the whiteness of the Rutile type Titanium Dioxide of acquisition; The method that patent application 91111933.7 provides a kind of " using fluid sulphuric acid sulphating legal system to be equipped with titanium dioxide by the anatase octahedrite washed ore of upgrading ", the anatase octahedrite of crossing with chemical treatment preconcentration and purifying (this paper is called the anatase octahedrite washed ore of upgrading), by using the sulfuric acid digestion, reaction often remains on liquid suspended state, use high acid concentration, and high temperature, under the boiling condition, so that after digestion fully, by the ingot of isolating the titanium sulfate that contains vitriol in the liquid medium, the water by thereafter or the black liquor body of recirculation, it is easy to dissolving, produces so-called " black liquor body " with efficient manner, and this black liquor body produces titanium dioxide by the processing of common other step of sulphate process, the complete required sour consumption of technology is minimum, and the discharging of pollutant effluents is also minimum.Also have patent application 95191970.9 or the like, but its production technique is generally complicated, the cost height, corrodibility is strong, and the three wastes are difficult.
Summary of the invention
The objective of the invention is to overcome the shortcoming of above-mentioned prior art and a kind of chemical treatment method that improves the titanium dioxide product grade is provided, it optionally removes the impurity in the titanium dioxide material, improve the content of titanium dioxide, satisfy demand high grade product.
Purpose of the present invention can realize by following technical measures: raw material of the present invention is the titanium dioxide material, as natural rutile, white titanium ore, high titanium ore, titanium slag, artificial rutile, rich titanium material etc., through after the conventional processing, carrying out the acid solution etch again handles, it is hydrofluoric acid solution that used acid solution is handled in etch, and raw material is added in the hydrofluoric acid solution, after the etch of certain hour, effluent discharge is cleaned, dry and get again.Hydrofluoric acid has selectivity to the etch that contains the titanium dioxide material, and titanium dioxide is insoluble to hydrofluoric acid solution, ZrO substantially
2Slightly soluble, other impurity such as SiO
2, Fe
2O
3, FeO, CaO, MgO, MnO etc. then are easy to dissolving.When these impurity were optionally dissolved, grade of titanium dioxide raise immediately, also reached simultaneously and fell silicon, falls iron and fall the purpose of sulphur, phosphorus.
Concentration is all effective to the high titanium material of etch arbitrarily though described hydrofluoric acid solution can adopt.But from shortening the production cycle, reducing spent acid solution generation and the consideration of control production cost, its concentration is 5～55%, is preferably 10～30%.
The described etch time is no less than 2 hours.
The weight ratio of described titanium dioxide material and hydrofluoric acid solution is 0.5～5.5: 1, is preferably 1.2～5: 1.
Technical scheme of the present invention is reasonable in design, utilize hydrofluoric acid to the etch of titanium dioxide material characteristics selectively, removal of contamination improves the titanium dioxide product grade, thereby promotes the value of product, satisfy the needs of manufacturing enterprise to high grade product, its processing method is simple, implements easily the efficient height, cost is low, is the good method of a Nover practical.
Embodiment
Embodiment one:
Raw material is a natural rutile, falls silicon and handles:
Etch: the concentration that adding prepares in the etching tank that has agitator is 28% hydrofluoric acid solution 100 gram, cover lids immediately; Pour the high titanium material natural rutiles of 450 grams into, ore faces is covered by acid solution fully, and cover lid immediately after the stirring, left standstill effluent discharge 24 hours then.
Clean: the natural rutile flushing with clean water, the raffinate after washing can be prepared the face supernatant mother liquor of acid solution through post precipitation next time, with abundant recovery waste liquid and reduce waste liquor contamination.After cleaning twice as stated above, in the pond, ore deposit, add an amount of clear liming, fully stir with neutralization and the remaining fluorine of sedimentation.
Dry: natural rutile can directly adopt sunlight to dry or advance to cure kiln drying, removes residual moisture.Can pack after the cooling screening.
Below be to handle forward and backward parameter:
Natural rutile: TiO before handling
2: 89.8%, SiO
2: 4.7%
Handle back natural rutile: TiO
2: 93.1%, SiO
2: 1.7%
Embodiment two:
Raw material is low grade natural rutile, produces superfine natural rutile:
Its processing method is with embodiment one, and wherein natural rutile 300 restrains, and concentration is 22% hydrofluoric acid solution 100 grams, leaves standstill 24 hours.
Below be to handle forward and backward parameter:
Natural rutile: TiO before handling
2: 89.7%, S:0.020%, P:0.023%
Handle back natural rutile: TiO
2: 95.12%, S:0.008%, P:0.018%
Embodiment three:
Its processing method is with embodiment one, and raw material is a titanium slag, adds titanium slag 200 grams, and concentration is 15% hydrofluoric acid solution 100 grams, leaves standstill 24 hours.
Below be to handle forward and backward parameter:
Titanium slag: TiO before handling
2: 88.3%
Handle back titanium slag: TiO
2: 93.6%
Embodiment four:
Its processing method is with embodiment one, and raw material is white titanium ore, adds white titanium ore 450 grams, and concentration is 28% hydrofluoric acid solution 100 grams, leaves standstill 24 hours.
Below be to handle forward and backward parameter:
White titanium ore grade: TiO before handling
2: 83.4%
Handle white titanium ore grade: the TiO in back
2: 90.3%
Embodiment five:
Its processing method is with embodiment one, and raw material is an artificial rutile, adds artificial rutile 350 grams, and concentration is 22% hydrofluoric acid solution 100 grams, leaves standstill 24 hours.
Below be to handle forward and backward parameter:
Artificial rutile: TiO before handling
2: 85.3%, FeO:6.7%
Handle back titanium slag grade: TiO
2: 90.4%, FeO:2.3%
Embodiment six:
Its processing method is with embodiment one, and raw material is the artificial rutile mine tailing, adds artificial rutile mine tailing 200 grams, and concentration is 18% hydrofluoric acid solution 100 grams, leaves standstill 24 hours.
Below be to handle forward and backward parameter:
Artificial rutile mine tailing: TiO before handling
2: 74.3%, C:0.21%
Handle back artificial rutile mine tailing: TiO
2: 81.2%, C:0.053%
Claims (5)
1, a kind of chemical treatment method that improves the titanium dioxide product grade is characterized in that the titanium dioxide material is carried out the acid solution etch to be handled, and it is hydrofluoric acid solution that used acid solution is handled in etch.
2, chemical treatment method according to claim 1 is characterized in that hydrofluoric acid solution concentration is 5～55%.
3, chemical treatment method according to claim 1, the weight ratio that it is characterized in that titanium dioxide material and hydrofluoric acid solution is 0.5～5.5: 1.
4, chemical treatment method according to claim 1 and 2 is characterized in that hydrofluoric acid solution concentration is 10～30%.
5, according to claim 1 or 3 described chemical treatment methods, the weight ratio that it is characterized in that titanium dioxide material and hydrofluoric acid solution is 1.2～5: 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2003101123833A CN1544336A (en) | 2003-11-27 | 2003-11-27 | Chemical processing method for promotion of titanium dioxide product quality |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2003101123833A CN1544336A (en) | 2003-11-27 | 2003-11-27 | Chemical processing method for promotion of titanium dioxide product quality |
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|---|---|
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100391851C (en) * | 2006-02-14 | 2008-06-04 | 浙江大学 | Method for preparing three-dimensional nanometer structure titanium dioxide |
| CN102701278A (en) * | 2012-06-28 | 2012-10-03 | 中山大学 | Method for preparing rutile type titanium dioxide nano-particles |
| CN103019775A (en) * | 2012-11-28 | 2013-04-03 | 北京小米科技有限责任公司 | Method, device and equipment for flashing for terminal equipment |
| CN103317250A (en) * | 2013-06-08 | 2013-09-25 | 四川汉龙新材料有限公司 | Method for measuring content of rutile in electrode covering |
| CN109402415A (en) * | 2018-07-17 | 2019-03-01 | 宜宾天原集团股份有限公司 | A kind of preparation of low grade natural rutile can chlorination rich-titanium material method |
-
2003
- 2003-11-27 CN CNA2003101123833A patent/CN1544336A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100391851C (en) * | 2006-02-14 | 2008-06-04 | 浙江大学 | Method for preparing three-dimensional nanometer structure titanium dioxide |
| CN102701278A (en) * | 2012-06-28 | 2012-10-03 | 中山大学 | Method for preparing rutile type titanium dioxide nano-particles |
| CN102701278B (en) * | 2012-06-28 | 2014-12-10 | 中山大学 | Method for preparing rutile type titanium dioxide nano-particles |
| CN103019775A (en) * | 2012-11-28 | 2013-04-03 | 北京小米科技有限责任公司 | Method, device and equipment for flashing for terminal equipment |
| CN103019775B (en) * | 2012-11-28 | 2016-04-13 | 小米科技有限责任公司 | A kind of method of terminal device brush machine, device and equipment |
| CN103317250A (en) * | 2013-06-08 | 2013-09-25 | 四川汉龙新材料有限公司 | Method for measuring content of rutile in electrode covering |
| CN109402415A (en) * | 2018-07-17 | 2019-03-01 | 宜宾天原集团股份有限公司 | A kind of preparation of low grade natural rutile can chlorination rich-titanium material method |
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