CN101824532A - Dephosphorizing method for phosphorus iron ore - Google Patents
Dephosphorizing method for phosphorus iron ore Download PDFInfo
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- CN101824532A CN101824532A CN 201010138165 CN201010138165A CN101824532A CN 101824532 A CN101824532 A CN 101824532A CN 201010138165 CN201010138165 CN 201010138165 CN 201010138165 A CN201010138165 A CN 201010138165A CN 101824532 A CN101824532 A CN 101824532A
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- iron ore
- acidleach
- containing iron
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Abstract
The invention relates to a dephosphorizing method for phosphorus iron ore. The method comprises the following steps of: after pulverizing iron ore, performing concentration to improve iron content and preliminarily reduce the phosphorus content; and then performing acid pickling, filtering, drying and other process, wherein the acid pickling process is combined with the ball milling process together, and acid pickling is performed during ball milling to improve the efficiency of acid pickling and dephosphorizing. The phosphorus content of the iron ore obtained through the process can be substantially reduced.
Description
Technical field
The invention belongs to a kind of method of phosphorus-containing iron ore dephosphorization, especially about in acidleach, carrying out the iron ore phosphorus removing method of this technology of ball milling.
Background technology
Phosphorus is one of harmful element main in the steel smelting procedure, and phosphorus is difficult to remove in sintering process, can enter the pig iron by Restore All again in smelting, if the too high meeting of phosphorus content makes it be easy to fracture in cold working in the pig iron, shows " cold shortness ".At present, mainly contain traditional beneficiating method and pickling process for the feasible method of the dephosphorization of high-phosphorus iron ore based on gravity treatment, magnetic separation, flotation and their combined process flow.But because the disseminated grain size of high-phosphorus iron ore phosphorus ore containing and other mineral is generally all very thin, the effect of traditional beneficiating method dephosphorization is not very desirable, and the effect of pickling process dephosphorization is better.But the dephosphorization of acidleach method needs the plenty of time that the phosphorus of the inside of mineral grain is removed, perhaps the particle ball milling to be got very thin after, could accelerate acidleach speed.
Summary of the invention
The purpose of this invention is to provide a kind of phosphorus removing method of phosphorus-containing iron ore, thereby overcome the above-mentioned problems in the prior art.
The phosphorus removing method of phosphorus-containing iron ore of the present invention, comprise with phosphorus-containing iron ore broken pulverize, selected, acidleach, filtration, oven dry, when acidleach, carry out the iron ore ball milling simultaneously.This employing fine grinding add method of pickling make embedding cloth closely phosphorus ore containing can dissociate gradually and leach, and then significantly reduce phosphorus content in the high-phosphorus iron ore.
The phosphorus removing method of phosphorus-containing iron ore of the present invention, wherein the contained phosphorus ore containing of iron ore is a calcium phosphate.
In the phosphorus removing method of the present invention, the acid of carrying out acidleach can be sulfuric acid, hydrochloric acid, nitric acid, and the concentration expressed in percentage by volume scope of acid is 4% to 35%.
In the phosphorus removing method of high-phosphorus iron ore of the present invention, the broken granularity of pulverizing of iron ore wherein is less than 1mm.
Beneficial effect of the present invention is as follows:
Compared to existing technology, the present invention proposes a kind of acidleach and ball milling process combined.This method can further improve the degree of acidleach dephosphorization.This kind method of pickling significantly reduces the phosphorus content of phosphorus-containing iron ore.
Embodiment
Embodiment 1
Former mining jaw crusher is crushed to-2mm, uses bevel-type ball mill ball milling then extremely less than 0.015mm.Will the good sample ore dilute with water of mill, to carry out selectedly then with shaking table, the operational condition of shaking table is stroke 12mm, jig frequency 300/min, 2.5 ° of cross dips, 0.5 ° of vertical inclination angle.The concentrate that tabling obtains is put into ball grinder, add the sulfuric acid of the volume fraction 10% of q.s, add agate, put into the planetary ball mill ball milling then 1 hour.Filter at last, and oven dry behind the water flushing filter residue 3 times, sort out agate, the sample ore that obtains promptly is final product.Table 1 has been listed test result.
Embodiment 2
Adopt the method for embodiment 1, with salt acid substitution sulfuric acid, the concentration of hydrochloric acid is 5%, ball milling 2 hours.Table 1 has been listed test result.
Embodiment 3
Adopt the method for embodiment 1, but be crushed to less than 0.1mm raw ore is broken, replace sulfuric acid to carry out acidleach with nitric acid, the concentration of volume percent of nitric acid is 20%.Table 1 has been listed test result.
Comparative Examples 1
Adopt the method for embodiment 1, the concentrate that tabling obtains is put into beaker, add the sulfuric acid of the volume fraction 10% of q.s, 4 hours after-filtration of acidleach, and oven dry behind the water flushing filter residue 3 times, the sample ore that obtains promptly is final product.Its test the results are shown in Table 1.
Table 1
| Grinding particle size (millimeter) | Acid kind and volumetric concentration | The ball milling time (hour) | Phosphorus content (wt%) | |
| Embodiment 1 | ??0.015 | 10% sulfuric acid | ??1 | ??0.095 |
| Embodiment 2 | ??0.015 | 5% hydrochloric acid | ??2 | ??0.068 |
| Embodiment 3 | ??0.10 | 20% nitric acid | ??1 | ??0.118 |
| Comparative Examples 1 | ??0.015 | 10% sulfuric acid | Ball milling not | ??0.29 |
Claims (4)
1. the phosphorus removing method of a phosphorus-containing iron ore, comprise with phosphorus-containing iron ore brokenly pulverize, selected, acidleach, filtration, oven dry, it is characterized in that acidleach and iron ore ball milling carry out simultaneously.
2. the phosphorus removing method of phosphorus-containing iron ore as claimed in claim 1, the phosphorus ore containing that it is characterized in that phosphorus-containing iron ore is a calcium phosphate.
3. the phosphorus removing method of phosphorus-containing iron ore as claimed in claim 1 or 2 is characterized in that adopting sulfuric acid, hydrochloric acid, nitric acid to carry out acidleach, and sour concentration of volume percent is 4% to 35%.
4. the phosphorus removing method of phosphorus-containing iron ore as claimed in claim 3, the granularity after it is characterized in that iron ore is broken and pulverizing is less than 0.1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010138165 CN101824532A (en) | 2010-04-02 | 2010-04-02 | Dephosphorizing method for phosphorus iron ore |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010138165 CN101824532A (en) | 2010-04-02 | 2010-04-02 | Dephosphorizing method for phosphorus iron ore |
Publications (1)
| Publication Number | Publication Date |
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| CN101824532A true CN101824532A (en) | 2010-09-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN 201010138165 Pending CN101824532A (en) | 2010-04-02 | 2010-04-02 | Dephosphorizing method for phosphorus iron ore |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107963666A (en) * | 2016-10-19 | 2018-04-27 | 中国科学院过程工程研究所 | A kind of method of chromium oxide dephosphorization |
| CN113042201A (en) * | 2021-03-30 | 2021-06-29 | 酒泉钢铁(集团)有限责任公司 | Iron-extracting and phosphorus-removing process for high-phosphorus hematite |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101054625A (en) * | 2007-04-28 | 2007-10-17 | 中南大学 | Method forpreparing iron concentrate for making iron from phosphorus-containing oolitic hematite |
| CN101240371A (en) * | 2008-03-14 | 2008-08-13 | 东北大学 | Method for extracting iron from poor mixed hematite |
| CN101487081A (en) * | 2009-03-04 | 2009-07-22 | 解能 | Dephosphorization method for oolitic high phosphorus iron ore |
-
2010
- 2010-04-02 CN CN 201010138165 patent/CN101824532A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101054625A (en) * | 2007-04-28 | 2007-10-17 | 中南大学 | Method forpreparing iron concentrate for making iron from phosphorus-containing oolitic hematite |
| CN101240371A (en) * | 2008-03-14 | 2008-08-13 | 东北大学 | Method for extracting iron from poor mixed hematite |
| CN101487081A (en) * | 2009-03-04 | 2009-07-22 | 解能 | Dephosphorization method for oolitic high phosphorus iron ore |
Non-Patent Citations (1)
| Title |
|---|
| 《金属矿山》 20091231 章少华等 焙烧对含菱磷铝锶矾高磷铁矿石酸浸除磷的影响 71-74 1-4 , 第2期 2 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107963666A (en) * | 2016-10-19 | 2018-04-27 | 中国科学院过程工程研究所 | A kind of method of chromium oxide dephosphorization |
| CN113042201A (en) * | 2021-03-30 | 2021-06-29 | 酒泉钢铁(集团)有限责任公司 | Iron-extracting and phosphorus-removing process for high-phosphorus hematite |
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Open date: 20100908 |