CN1640815A - Method for preparing low-Fe alpha-type spodumene using high-Fe spodumene - Google Patents
Method for preparing low-Fe alpha-type spodumene using high-Fe spodumene Download PDFInfo
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- CN1640815A CN1640815A CN 200410000728 CN200410000728A CN1640815A CN 1640815 A CN1640815 A CN 1640815A CN 200410000728 CN200410000728 CN 200410000728 CN 200410000728 A CN200410000728 A CN 200410000728A CN 1640815 A CN1640815 A CN 1640815A
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- triphane
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Abstract
In a dry magnetic separator and under magnetic field intensity of 8000-20000 oersted, 10-60 mesh sieved high-iron spodumene ore powder with Fe2O3 content as high as 1.2 wt% is selected magnetically to obtain low-iron alpha-type spodumene ore powder with Fe2O3 content reduced to 0.13-0.20 wt% while maintaining Li2O content unchanged basically. The said process can produce low-grade high-iron spodumene ore powder into low-iron alpha-type spodumene ore powder for use in glass industry.
Description
Technical field
The present invention relates to the working method in triphane ore deposit, especially relate to method with the low iron α of high Fe-spodumene ore deposit preparation-type triphane.
Background technology
Triphane (Spodumene) is lithium-manosil AS salt mine, and molecular formula is Li
2O.Al
2O
3.4SiO
2The theoretical L i of pure triphane
2The maximum value of O content is 8%.Naturally occurring triphane ore deposit is α-type triphane, when it is heated to about 1082 ℃, irreversible transition takes place, and generates β-type triphane, simultaneously, follows 30% volume growth, and its proportion is reduced to 2.4 from 3.2 subsequently.In 25 ℃ to 1000 ℃ temperature range, β-type triphane has very low thermal expansivity, is about 1 * 10
-6/ ℃.Triphane is mainly used in the manufacturing field of glass and pottery, and wherein, α-type triphane can be used as the additive that glass is made, and β-type triphane can be used as the additive that pottery is made.The adding of triphane not only makes the manufacturing energy consumption of glass or pottery reduce but also makes the performance of the finished product be improved.Make triphane have higher industrial application value.
But, produce the high triphane ore deposit of some iron-holder in areas such as Australia and China Sichuan, wherein Li in some triphane ore deposit
2The content of O is also lower.And Li
2The content of O 5-6% (weight) in addition low to 4.5% (weight), lower be low to moderate 2.5% (weight), and iron level only is applied in field of metallurgy up to this kind triphane of 0.4-1.2% (weight), uses undesirable in glass, pottery, porcelain enamel industry.
The report of this high Fe-spodumene not being reprocessed in the prior art.If but adopted flotation process to produce low iron α-type triphane, then yield is low, cost is high, and would be uneconomical economically.
Therefore, the objective of the invention is to enlarge the range of application of these high Fe-spodumenes, improve its using value in industry by effective means with a kind of economy.
Summary of the invention
In one aspect of the invention, be to reduce iron level in the high Fe-spodumene, for this reason, the invention provides a kind of method that adopts the high ferro α-low iron α of type triphane preparation-type triphane, Fe in described high ferro α-type triphane
2O
3Content be that 0.25% (weight) comprises the steps: to 1.2% (weight) this method
(1) collect after the drying and α-type triphane under the sieve that the 10-60 mesh sieve divides;
(2) will sieve down α-type triphane through dry-type magnetic extractor at the 8000-20000 oersted, preferably under the magneticstrength of 10000-18000 oersted, separate deironing, obtain Fe
2O
3Content at low iron α-type triphane of 0.13-0.20% (weight).
In aforesaid method of the present invention, the Li of described high ferro α-type triphane
2O content be 2.5-6.5% (weight), generally in 4.5% (weight) to 6.5% (weight).
In the method for the invention, described dry-type magnetic extractor is permanent magnetism belt magnetic separator, permanent magnetic pulley magnetic separator, electromagnetic cylinder magnetic separator or magnetic-grid-type magnetic separator forever, and preferably adopting forever, the magnetic-grid-type magnetic separator carries out magnetic separation.
In the method for the invention, on demand, may further include to after high ferro α-the type triphane sieves the step that the coarse grain triphane on its sieve is pulverized.
In method of the present invention, described drying is to shine or dry by cold the water content of high ferro α-type triphane is reduced to 1.5% (weight) or is lower than 1.5% (weight); Describedly adopt trommel screen or vibratory screening apparatus to carry out, preferably dried triphane is sieved through the 12-48 order through 10-60 mesh sieve branch.
Adopt magnetic selection method of the present invention, the triphane ore deposit of high ferro can be processed into low iron α-type triphane, its Fe
2O
3Content can be reduced in the scope of 0.13-0.20% (weight) and Li
2The content of O remains unchanged substantially, with the low iron α-type triphane that provides glass industry to use, or as the intermediate raw material that further prepares high-quality β-type triphane.
Embodiment
According to the present invention, with Fe
2O
3Content is at 0.25-1.2% (weight), Li
2O content carries out drying in the high Fe-spodumene ore deposit of 4.5-6.5% (weight), water content 2-7% (weight) through the cool method of shining and/or drying, and makes water-content wherein be less than or equal to 1.5% (weight), preferably smaller or equal to 1.0% (weight).If adopt furnace drying method to carry out drying, can use to make up and finish such as polytype drying plant such as electric oven, helicoid screw dryer, vibrating dryer, whizzer, rower drier or oven dry bed or its.Temperature of charge during oven dry should be controlled at more than or equal to 40 ℃, preferably dries under 80-350 ℃ temperature.
Count 10-60 purpose sieve apparatus through the dried triphane after the oven dry with order and sieve, preferably sieve with the 12-48 order.Screening can adopt the equipment of this area routine to carry out, and as adopting trommel screen or vibratory screening apparatus, described vibratory screening apparatus can be inertia vibrating screen, self-fixed centre shale shaker, linear vibrating screen, resonance screen, hummer screen, motor oscillating sieve etc.
Discover that the size of triphane particle diameter has remarkable influence to utilizing the magnetic separation mode to separate deironing.When with the 10-60 order, when especially sieving with 12-48 purpose screen cloth, resulting thin triphane can access effective separation in magneticstrength is the magnetic separator of 8000-20000 oersted; If the granularity of thin triphane is too thin, though can obtain Fe
2O
3The product that content is low, but the rate of recovery of the efficient of magnetic separation and product is lower, and if the granularity of thin triphane is too thick, then can not separate deironing effectively.If sieve with 12-48 purpose screen cloth, the Fe of α after magnetic separation-type triphane
2O
3Content can be reduced to 0.13-0.2%, and total yield is at 95-96.5%.
The coarse grain triphane that obtains after the screening can be used for directly calcining and pulverize through selectivity and prepare low iron high-quality β-type triphane, detailed content see also submit on the same day with the present invention, denomination of invention is the Chinese invention patent application of " method for preparing high-quality β-type triphane ".
Perhaps, in order to increase the output of low iron α-type triphane, the coarse grain triphane after the screening can further be ground into the following thin triphane of 10-60 order and above thin triphane carries out follow-up magnetic separation together, obtains low iron α-type triphane.
The dry type magnetic separation method is adopted in the magnetic separation of thin triphane, can adopt permanent magnetism belt magnetic separator, permanent magnetic pulley magnetic separator, electromagnetic cylinder magnetic separator or forever dry-type magnetic extractor such as magnetic-grid-type magnetic separator carry out.Studies show that, reach the 8000-20000 oersted in magneticstrength, preferably under the 10000-18000 oersted, the Fe in the above-mentioned thin triphane
2O
3Can effectively be separated.In magnetic plant, the parameters such as rotating speed of the inlet amount of triphane and magnetic roller can be adjusted, to reach best velocity of separation and effect.
Through after the magnetic separation, discard the scum of separating, obtain Fe
2O
3Content be low iron α-type triphane of 0.13-0.20% (weight), the Li of this low iron α-type triphane
2O content and its raw material are basic identical.Resulting low iron α-type triphane is applicable to as the glass industry additive.
This shows, the invention solves the problem of the iron level that reduces high Fe-spodumene, thereby make this high Fe-spodumene in non-metallurgical industry, obtain using widely.
Describe the present invention by the following examples in detail, but embodiments of the present invention are not limited to following embodiment, also should be considered as protection scope of the present invention not deviating from the improvement carried out on the basis that the invention is intended to and change.
Embodiment
Embodiment 1
Select Australian high Fe-spodumene ore deposit 500kg for use, its crystalline structure is α-type, wherein, and Fe
2O
3Content 0.45% (weight), Li
2O content 6.2% (weight), water-content 5% (weight), granularity is smaller or equal to 10 millimeters.Adopt coal-fired oven dry bed above-mentioned triphane ore deposit to be dried the oven dry area 10.6m of oven dry bed
2, at 60-85 ℃, the water content of the dried triphane in oven dry back is about 1.0% at 500-900 ℃, exhanst gas outlet temperature for the smoke inlet temperature.Adopt the motor oscillating sieve that dried triphane is sieved, the sifting bed area is 1m
2, sieve number is 16 orders (0.991mm), amplitude is at ± 2mm.Obtain thin triphane 297.88kg under 16 mesh sieves after the screening, thick triphane 174.94kg on 16 mesh sieves.To sieve down triphane and add the permanent magnetism belt magnetic separator, the bandwidth 600mm of permanent magnetism belt magnetic separator, belt length 800mm, magneticstrength is 17000 oersteds, input speed 450kg/h separates and removes scum, obtains low iron α-type triphane 288.94kg.Detection shows, Fe in resulting low iron α-type triphane
2O
3Content 0.2% (weight), Li
2O content remains unchanged.The output capacity of low Fe-spodumene is 57.79%.
Embodiment 2
To in embodiment 1, adopt coarse grain triphane 174.94kg on the sieve of electrode vibration sieve screening to be ground into thin triphane below 16 orders, repeat the magnetic separation step among the embodiment 1, obtain low iron α-type triphane 168.84kg, wherein Fe
2O
3Content 0.2%, Li
2The content 6.2% of O.
Embodiment 1 adds that total output capacity of the low Fe-spodumene that embodiment 2 obtains is 92.78%, Li
2The total yield of O is 95.41%.
Embodiment 3
Select Australian high Fe-spodumene ore deposit 500kg for use, its crystalline structure is α-type, wherein, and Fe
2O
3Content 0.8% (weight), Li
2O content 5% (weight), water-content 5% (weight), granularity is smaller or equal to 10 millimeters.Adopt coal-fired oven dry bed above-mentioned triphane ore deposit to be dried the oven dry area 10.6m of oven dry bed
2, at 60-85 ℃, the water content of the dried triphane in oven dry back is about 1.0% at 500-900 ℃, exhanst gas outlet temperature for the smoke inlet temperature.Adopt the motor oscillating sieve that dried triphane is sieved, the sifting bed area is 1m
2, sieve number is 24 orders, amplitude is at ± 2mm.Sieve triphane down adds the permanent magnetism belt magnetic separator, the bandwidth 800mm of permanent magnetism belt magnetic separator, and belt length 800mm, magneticstrength is 18000 oersteds, input speed 600kg/h separates and removes scum, obtains low iron α-type triphane 270.6kg.Detection shows, Fe in resulting low iron α-type triphane
2O
3Content 0.16% (weight), Li
2O content remains unchanged.An output capacity of low iron α-type triphane is 54.1%.
Claims (10)
1. one kind is adopted the method that high ferro α-iron α-type triphane is hanged down in the preparation of type triphane, Fe in described high ferro α-type triphane
2O
3Content be 0.25% (weight) to 1.2% (weight), this method comprises the steps:
(1) collect after the drying and α-type triphane under the sieve that the 10-60 mesh sieve divides;
(2) will sieve down α-type triphane separates deironing through dry-type magnetic extractor, obtains Fe under the magneticstrength of 8000-20000 oersted
2O
3Content at low iron α-type triphane of 0.13-0.20% (weight).
2. the Li of the method for claim 1, wherein described high ferro α-type triphane
2O content is that 2.5% (weight) is to 6.5% (weight).
3. the method for claim 1, wherein described magneticstrength is the 10000-18000 oersted.
4. the method for claim 1, wherein described dry-type magnetic extractor is permanent magnetism belt magnetic separator, permanent magnetic pulley magnetic separator, electromagnetic cylinder magnetic separator or magnetic-grid-type magnetic separator forever.
5. the method for claim 1 further is included in after high ferro α-the type triphane sieves, and its sieve is gone up the step that the coarse grain triphane is pulverized.
6. the method for claim 1, wherein described drying is to shine or dry by cold the water content of high ferro low-quality α-type triphane is reduced to 1.5% (weight) or is lower than 1.5% (weight).
7. method as claimed in claim 6, wherein, described oven dry is to carry out under more than or equal to 40 ℃ temperature.
8. method as claimed in claim 7, wherein, described oven dry is to carry out under 80-350 ℃ temperature.
9. the method for claim 1, wherein described 10-60 mesh sieve is that trommel screen or vibratory screening apparatus carry out.
10. the method for claim 1, wherein described sieve is a 12-48 purpose sieve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410000728 CN1640815A (en) | 2004-01-16 | 2004-01-16 | Method for preparing low-Fe alpha-type spodumene using high-Fe spodumene |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410000728 CN1640815A (en) | 2004-01-16 | 2004-01-16 | Method for preparing low-Fe alpha-type spodumene using high-Fe spodumene |
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|---|---|
| CN1640815A true CN1640815A (en) | 2005-07-20 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101147888B (en) * | 2007-10-15 | 2010-09-15 | 陶家荣 | Spodumene ore heavy medium-strong-magnetic ore-dressing technology method |
| US10207275B2 (en) | 2012-10-26 | 2019-02-19 | Vale S.A. | Iron ore concentration process with grinding circuit, dry desliming and dry or mixed (dry and wet) concentration |
| CN112551535A (en) * | 2020-12-30 | 2021-03-26 | 泉州市利芝新材料科技有限公司 | Spodumene iron-removing and whitening process |
| CN112758946A (en) * | 2021-03-16 | 2021-05-07 | 长沙市原鹏化工科技有限公司 | Preparation method of microcrystalline spodumene micro powder |
-
2004
- 2004-01-16 CN CN 200410000728 patent/CN1640815A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101147888B (en) * | 2007-10-15 | 2010-09-15 | 陶家荣 | Spodumene ore heavy medium-strong-magnetic ore-dressing technology method |
| US10207275B2 (en) | 2012-10-26 | 2019-02-19 | Vale S.A. | Iron ore concentration process with grinding circuit, dry desliming and dry or mixed (dry and wet) concentration |
| CN112551535A (en) * | 2020-12-30 | 2021-03-26 | 泉州市利芝新材料科技有限公司 | Spodumene iron-removing and whitening process |
| CN112758946A (en) * | 2021-03-16 | 2021-05-07 | 长沙市原鹏化工科技有限公司 | Preparation method of microcrystalline spodumene micro powder |
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