CN109133190A - The processing method of magnetic iron ore - Google Patents
The processing method of magnetic iron ore Download PDFInfo
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- CN109133190A CN109133190A CN201810876483.XA CN201810876483A CN109133190A CN 109133190 A CN109133190 A CN 109133190A CN 201810876483 A CN201810876483 A CN 201810876483A CN 109133190 A CN109133190 A CN 109133190A
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- iron ore
- magnetic iron
- iron
- gas
- sulfuric acid
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G49/00—Compounds of iron
- C01G49/14—Sulfates
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/80—Compositional purity
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- Compounds Of Iron (AREA)
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Abstract
The invention discloses a kind of processing methods of magnetic iron ore, the following steps are included: 1) magnetic iron ore is reacted with ferric nitrate, gas-phase product and liquid-solid mixture are obtained, liquid-solid mixture obtains iron nitrate solution and iron hydroxide solid, iron nitrate solution circulating and recovering after being separated by solid-liquid separation；2) absorbed after mixing with air gas-phase product using the concentrated sulfuric acid, after dilution concentrated sulfuric acid product, take concentrated sulfuric acid product circulation in part for absorption step 1) in gained gas-phase product；3) gas-phase product unabsorbed in step 2) is mixed with excess air, the part ferric hydroxide absorption in step 1) is used to obtain iron nitrate solution after fully oxidized, iron nitrate solution is recycled for reacting with magnetic iron ore；4) remaining iron hydroxide is mixed with the concentrated sulfuric acid, reduced iron powder reaction is added, obtains ferrous sulfate heptahydrate crystal after filtering, evaporative crystallization.This processing method production cost is low, low energy consumption, and reduces by-product, provides a kind of effective and feasible utilization ways for magnetic iron ore.
Description
Technical field
The present invention relates to mineral manufacture fields, in particular to a kind of processing method of magnetic iron ore.
Background technique
Magnetic iron ore is the sulfide mineral of one of pyrite race iron, and S content generally contains height compared with FeS theoretical content,
S content is 39~40%, magnetic iron ore often with pyrite association and yield it is less, be mainly used for the preparation of sulfuric acid, but magnetic is yellow
Iron ore is compared to pyrite FeS2Sulfur content is lower, and it is big that economic value can not show a candle to pyrite ore.
Since the economic value of magnetic iron ore is low, it is not separated generally industrially with pyrite, but has copper mine production enterprise
Industry is to improve Cu Concentrate Grade, has been separately separated magnetic iron ore using magnetic separation, and subsequent use calcination method is caused individually to process magnetic Huang
When iron ore produces sulfuric acid, that there are processing costs is big, energy consumption is high, the extremely low problem of economic benefit.
In addition, ferric nitrate is a kind of strong oxidizer, it can be reacted with magnetic iron ore and generate nitrogen oxides, sulfur dioxide and hydrogen-oxygen
It is had the following problems when changing iron, but handling magnetic iron ore in this way: containing nitric oxide and two in ferric nitrate reduzate
The nitrogen oxides such as nitrogen oxide, industrially use sodium hydroxide solution absorbing NOx, and at high cost and by-product is impure nitre
Sour sodium and sodium nitrite.
Summary of the invention
Present invention aim to provide a kind of processing method of magnetic iron ore, the processing method production cost is low, energy
It consumes low, and reduces by-product.
To achieve the above object, the technical solution adopted by the present invention is that: a kind of processing method of magnetic iron ore, including following
Step:
1) magnetic iron ore is reacted at a certain temperature with iron nitrate solution, obtains gas-phase product and liquid mixes admittedly
Object, liquid-solid mixture be separated by solid-liquid separation after iron nitrate solution and iron hydroxide solid, iron nitrate solution circulation for magnetic Huang iron
Mine reaction；
2) it is absorbed after mixing gained gas-phase product in step 1) with a certain amount of air using the concentrated sulfuric acid, dense sulphur is obtained after dilution
Acid product takes concentrated sulfuric acid product circulation in part for absorption step 1) in gained gas-phase product；
3) gas-phase product unabsorbed in step 2) is mixed with excess air, uses the portion in step 1) after fully oxidized
Iron hydroxide solid sorbent is divided to obtain iron nitrate solution, iron nitrate solution is recycled for reacting with magnetic iron ore；
4) by part concentrated sulfuric acid product mix in remaining iron hydroxide solid and step 2), it is anti-that reduced iron powder is then added
It answers, ferrous sulfate heptahydrate crystal is obtained after filtering, evaporative crystallization.
Further, in the step 1), the temperature that magnetic iron ore is reacted with iron nitrate solution is 80~110 DEG C, nitric acid
The concentration of ferrous solution is 1~2mol/L.
Further, in the step 2), gained gas-phase product is mixed with a certain amount of air, and gas-phase product and air are being marked
The volume ratio of quasi- state is 0.1~10.
Further, it in the step 3), when with gas-phase product of the iron hydroxide solid sorbent after air oxidation, absorbs
The temperature of process is controlled at 20~60 DEG C.
Further, in the step 4), the molar ratio of iron hydroxide solid and reduced iron powder is 1.9~2.1.
Further, in the step 2), gas-phase product is nitrogen oxides and sulfur dioxide.
Further, in the step 1), unabsorbed gas-phase product is nitrogen oxides.
Further, in the step 2), the gained concentrated sulfuric acid obtains concentrated sulfuric acid product after being diluted with water to 98%.
Further, in the step 1), the molar ratio of element sulphur is 0.01~1.0 in ferric nitrate and magnetic iron ore.
Further, in the step 4), the molar ratio of iron hydroxide and the concentrated sulfuric acid is 0.1~10.0.
Compared with prior art, the invention has the following advantages that
First, present invention introduces ferric nitrates as transition oxidant, magnetic iron ore and empty is realized under the conditions of softening and learning
The oxidation process of gas avoids the big investment and high energy consumption of calcination method processing magnetic iron ore, in the case where processing capacity is small, substantially
It reduces costs, provides a kind of effective and feasible utilization ways for magnetic iron ore.
Second, the present invention for absorbing NOx and can be followed using the intermediate product iron hydroxide generated in reaction process
Ring is used for the oxidation process of magnetic iron ore, avoids using sodium hydroxide absorbing NOx, further reduced production cost,
And avoid the generation of by-product.
Third, the present invention is using the sulfuric acid that generates in reaction process and intermediate product iron hydroxide, and is added reduced iron powder,
Product ferrous sulfate heptahydrate is obtained, the generation of by-product is reduced, the purity after gained ferrous sulfate heptahydrate crystal is dry is
98.0~99.999%.
Detailed description of the invention
Fig. 1 is the scanning electron microscope (SEM) photograph of intermediate product iron hydroxide in the embodiment of the present invention 1.
Specific embodiment
The following further describes the present invention in detail with reference to the accompanying drawings and specific embodiments, convenient for more clearly understanding this
Invention, but they limiting the invention.
Embodiment 1
A kind of processing method of magnetic iron ore, its step are as follows:
1) ferric nitrate that magnetic iron ore and concentration are 2mol/L is reacted at a temperature of 100 DEG C, wherein ferric nitrate with
The molar ratio of element sulphur is 0.01~1.0, preferably 2:9 in magnetic iron ore, obtains gas-phase product and liquid-solid mixture, liquid mixes admittedly
It closes and obtains iron nitrate solution and iron hydroxide solid after object is separated by solid-liquid separation, iron nitrate solution is recycled for reacting with magnetic iron ore；
It 2) is 2 by (20 DEG C, 1 standard atmospheric pressure) volume ratio under standard state by gained gas-phase product in step 1) and air
Ratio mixing, absorbed using the concentrated sulfuric acid, unabsorbed gas-phase product is nitrogen oxides, and the gained concentrated sulfuric acid is diluted with water to 98%
Afterwards a part of concentrated sulfuric acid product, other concentrated sulfuric acids circulation be used for absorption step 1) in gained gas-phase product；
3) gas-phase product unabsorbed in step 2) is mixed with excess air, uses the portion in step 1) after fully oxidized
Point iron hydroxide solid (as shown in Figure 1) absorbs to obtain iron nitrate solution, and the temperature of absorption process is controlled at 30 DEG C, iron nitrate solution
Circulation with magnetic iron ore for reacting；
4) by part concentrated sulfuric acid product mix in residual hydrogen ferric oxide solid in step 3) and step 2), reduced iron powder is added
The ratio of the amount of substance of reaction, iron hydroxide and reduced iron powder is 2, and the molar ratio of iron hydroxide and the concentrated sulfuric acid is 0.1~10.0, excellent
2:3 is selected, filtering, evaporative crystallization obtain ferrous sulfate heptahydrate crystal.
Embodiment 2
A kind of processing method of magnetic iron ore, its step are as follows:
1) ferric nitrate that magnetic iron ore and concentration are 2mol/L is reacted at a temperature of 80 DEG C, wherein ferric nitrate with
The molar ratio of element sulphur is 0.01~1.0 in magnetic iron ore, obtains gas-phase product and liquid-solid mixture, liquid-solid mixture solid-liquid point
Iron nitrate solution and iron hydroxide solid are obtained from after, iron nitrate solution is recycled for reacting with magnetic iron ore；
2) by gained gas-phase product in step 1) and air by standard state lower volume than the ratio mixing for 0.1, use
The concentrated sulfuric acid absorbs, and unabsorbed gas-phase product is nitrogen oxides, and the gained concentrated sulfuric acid obtains a part of dense sulphur after being diluted with water to 98%
Acid product, other concentrated sulfuric acids circulation be used for absorption step 1) in gained gas-phase product；
3) gas-phase product unabsorbed in step 2) is mixed with excess air, uses the portion in step 1) after fully oxidized
Point iron hydroxide solid sorbent obtains iron nitrate solution, the temperature control of absorption process at 20 DEG C, iron nitrate solution circulation for
Magnetic iron ore reaction；
4) by part concentrated sulfuric acid product mix in residual hydrogen ferric oxide solid in step 3) and step 2), reduced iron powder is added
The ratio of the amount of substance of reaction, iron hydroxide and reduced iron powder is 1.9, and the molar ratio of iron hydroxide and the concentrated sulfuric acid is 0.1~10.0,
Filtering, evaporative crystallization obtain ferrous sulfate heptahydrate crystal.
Embodiment 3
A kind of processing method of magnetic iron ore, its step are as follows:
1) ferric nitrate that magnetic iron ore and concentration are 1mol/L is reacted at a temperature of 110 DEG C, wherein ferric nitrate with
The molar ratio of element sulphur is 0.01~1.0 in magnetic iron ore, obtains gas-phase product and liquid-solid mixture, liquid-solid mixture solid-liquid point
Iron nitrate solution and iron hydroxide solid are obtained from after, iron nitrate solution is recycled for reacting with magnetic iron ore；
2) by gained gas-phase product in step 1) and air by standard state lower volume than the ratio mixing for 10, use
The concentrated sulfuric acid absorbs, and unabsorbed gas-phase product is nitrogen oxides, and the gained concentrated sulfuric acid obtains a part of dense sulphur after being diluted with water to 98%
Acid product, other concentrated sulfuric acids circulation be used for absorption step 1) in gained gas-phase product；
3) gas-phase product unabsorbed in step 2) is mixed with excess air, uses the portion in step 1) after fully oxidized
Point iron hydroxide solid sorbent obtains iron nitrate solution, the temperature control of absorption process at 60 DEG C, iron nitrate solution circulation for
Magnetic iron ore reaction；
4) by part concentrated sulfuric acid product mix in residual hydrogen ferric oxide solid in step 3) and step 2), reduced iron powder is added
The ratio of the amount of substance of reaction, iron hydroxide and reduced iron powder is 2.1, and the molar ratio of iron hydroxide and the concentrated sulfuric acid is 0.1~10.0,
Filtering, evaporative crystallization obtain ferrous sulfate heptahydrate crystal.
Claims (10)
1. a kind of processing method of magnetic iron ore, it is characterised in that: the following steps are included:
1) magnetic iron ore is reacted at a certain temperature with iron nitrate solution, obtains gas-phase product and liquid-solid mixture, liquid
Solid mixture obtains iron nitrate solution and iron hydroxide solid after being separated by solid-liquid separation, iron nitrate solution is recycled for anti-with magnetic iron ore
It answers；
2) it is absorbed after mixing gained gas-phase product in step 1) with a certain amount of air using the concentrated sulfuric acid, the concentrated sulfuric acid is obtained after dilution and is produced
Product take concentrated sulfuric acid product circulation in part for absorption step 1) in gained gas-phase product；
3) gas-phase product unabsorbed in step 2) is mixed with excess air, uses the part hydrogen in step 1) after fully oxidized
Ferric oxide solid absorbs to obtain iron nitrate solution, and iron nitrate solution is recycled for reacting with magnetic iron ore；
4) by part concentrated sulfuric acid product mix in remaining iron hydroxide solid and step 2), reduced iron powder reaction is then added,
Ferrous sulfate heptahydrate crystal is obtained after filtering, evaporative crystallization.
2. the processing method of magnetic iron ore according to claim 1, it is characterised in that: in the step 1), magnetic iron ore with
The temperature of iron nitrate solution reaction is 80~110 DEG C, and the concentration of iron nitrate solution is 1~2mol/L.
3. the processing method of magnetic iron ore according to claim 1 or claim 2, it is characterised in that: in the step 2), gained gas phase
Product is mixed with a certain amount of air, and gas-phase product and air are 0.1~10 in the volume ratio of standard state.
4. the processing method of magnetic iron ore according to claim 1 or claim 2, it is characterised in that: in the step 3), use hydroxide
When gas-phase product of the iron solid sorbent after air oxidation, the temperature of absorption process is controlled at 20~60 DEG C.
5. the processing method of magnetic iron ore according to claim 1 or claim 2, it is characterised in that: in the step 4), iron hydroxide
The molar ratio of solid and reduced iron powder is 1.9~2.1.
6. the processing method of magnetic iron ore according to claim 1 or claim 2, it is characterised in that: in the step 2), gas-phase product
For nitrogen oxides and sulfur dioxide.
7. the processing method of magnetic iron ore according to claim 1 or claim 2, it is characterised in that: unabsorbed in the step 1)
Gas-phase product is nitrogen oxides.
8. the processing method of magnetic iron ore according to claim 1 or claim 2, it is characterised in that: in the step 2), the dense sulphur of gained
Acid obtains concentrated sulfuric acid product after being diluted with water to 98%.
9. the processing method of magnetic iron ore according to claim 1 or claim 2, it is characterised in that: in the step 1), ferric nitrate with
The molar ratio of element sulphur is 0.01~1.0 in magnetic iron ore.
10. the processing method of magnetic iron ore according to claim 1 or claim 2, it is characterised in that: in the step 4), hydroxide
The molar ratio of iron and the concentrated sulfuric acid is 0.1~10.0.
Priority Applications (1)
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| CN201810876483.XA CN109133190B (en) | 2018-08-03 | 2018-08-03 | Processing method of pyrrhotite |
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| CN201810876483.XA CN109133190B (en) | 2018-08-03 | 2018-08-03 | Processing method of pyrrhotite |
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| CN109133190B CN109133190B (en) | 2020-12-29 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112708753A (en) * | 2020-12-29 | 2021-04-27 | 武钢资源集团大冶铁矿有限公司 | Deep desulfurization treatment method and system for iron ore concentrate |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1846003A (en) * | 2003-07-15 | 2006-10-11 | 明特克公司 | Oxidative leach process |
| WO2010125205A1 (en) * | 2009-04-27 | 2010-11-04 | Tioxide Europe, S.L. | Method for producing ferrous sulphate from pyrite ash |
| CN102963943A (en) * | 2012-12-21 | 2013-03-13 | 南京大学 | Method for treating nitrobenzene wastewater by natural pyrrhotite |
| CN102989589A (en) * | 2012-12-05 | 2013-03-27 | 铜陵有色金属集团股份有限公司 | Process for recovering inhibited pyrite and pyrrhotite by utilizing two-step method |
| CN105776353A (en) * | 2016-03-29 | 2016-07-20 | 中国石油大学(北京) | Ironic sulfides and preparation method thereof |
| CN106807317A (en) * | 2017-04-11 | 2017-06-09 | 王爽 | A kind of reaction unit for disperseing to mix battery material |
| CN108190964A (en) * | 2018-03-29 | 2018-06-22 | 黄河水利职业技术学院 | A kind of method that ferrate solution is prepared using pyrite cinder |
-
2018
- 2018-08-03 CN CN201810876483.XA patent/CN109133190B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1846003A (en) * | 2003-07-15 | 2006-10-11 | 明特克公司 | Oxidative leach process |
| WO2010125205A1 (en) * | 2009-04-27 | 2010-11-04 | Tioxide Europe, S.L. | Method for producing ferrous sulphate from pyrite ash |
| CN102989589A (en) * | 2012-12-05 | 2013-03-27 | 铜陵有色金属集团股份有限公司 | Process for recovering inhibited pyrite and pyrrhotite by utilizing two-step method |
| CN102963943A (en) * | 2012-12-21 | 2013-03-13 | 南京大学 | Method for treating nitrobenzene wastewater by natural pyrrhotite |
| CN105776353A (en) * | 2016-03-29 | 2016-07-20 | 中国石油大学(北京) | Ironic sulfides and preparation method thereof |
| CN106807317A (en) * | 2017-04-11 | 2017-06-09 | 王爽 | A kind of reaction unit for disperseing to mix battery material |
| CN108190964A (en) * | 2018-03-29 | 2018-06-22 | 黄河水利职业技术学院 | A kind of method that ferrate solution is prepared using pyrite cinder |
Non-Patent Citations (6)
| Title |
|---|
| DAVID J. DROPPERT ET AL.: "The leaching behaviour of nickeliferous pyrrhotite concentrate in hot nitric acid", 《HYDROMETALLURGY》 * |
| HAIPENG WANG ET AL.: "A REVIEW ON PROCESSRELATED CHARACTERISTICS OF PYRRHOTITE", 《MINERAL PROCESSING & EXTRACTIVE METALL. REV》 * |
| RUIHUA LI ET AL.: "Simultaneous nitrate and phosphate removal from wastewater lacking organic matter through microbial oxidation of pyrrhotite coupled to nitrate reduction", 《WATER RESEARCH》 * |
| 刘氘等: "硝酸浸取铁矿石中磁黄铁矿和磁铁矿的物相分离", 《中国非金属矿工业导刊》 * |
| 李文娟等: "含磁黄铁矿硫化铜矿石的电位调控浮选研究", 《稀有金属》 * |
| 罗增鑫等: "复杂难选铅锑锌矿石选矿试验研究", 《矿产综合利用》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112708753A (en) * | 2020-12-29 | 2021-04-27 | 武钢资源集团大冶铁矿有限公司 | Deep desulfurization treatment method and system for iron ore concentrate |
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Effective date of registration: 20201203 Address after: 435006 No. 53 Shengli Road, Tieshan District, Hubei, Huangshi Applicant after: Daye iron ore Co., Ltd. of WISCO Resources Group Address before: 430080 No. six road construction, No. 107, Qingshan District, Wuhan, Hubei Applicant before: WUGANG RESOURCE GROUP Co.,Ltd. |
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