CN101037722A - Method for preparing puddling iron concentrate by high-alumina iron ore - Google Patents
Method for preparing puddling iron concentrate by high-alumina iron ore Download PDFInfo
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- CN101037722A CN101037722A CNA2007100348452A CN200710034845A CN101037722A CN 101037722 A CN101037722 A CN 101037722A CN A2007100348452 A CNA2007100348452 A CN A2007100348452A CN 200710034845 A CN200710034845 A CN 200710034845A CN 101037722 A CN101037722 A CN 101037722A
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Abstract
The invention disclosed a method for manufacturing the iron ore concentrate for ironmaking by the high aluminium iron ore, wherein after iron ore is broken to the granularity of less than 1.0mm which is in 40%-60%, it is mixed with Na2CO3 based on the proportion of 10-40 weight percent, and is braked for 10-30 minutes at the temperature of 900-1050 DEG C, then placed in the reactor to be extracted by 100-150 g/l solution at the temperature of 80-150 DEG C based on the liquid-solid quality rate of 3/1 -6/1 for 5-30 minutes, the filtrate can be extracted by the dilute sulphuric acid of 1.0-15 mass concentration percent at the temperature of 80-120 DEG C after solid-liquid separation for 10-30 minutes, and the solid is the iron ore concentrate after solid-liquid separation. The content of Al2O3 and Na2O in ore concentrate satisfies the requirement of blast furnace ironmaking materials using the invention. The invention can sufficiently and reasonably use existing rich high aluminium low-grade iron ore with good dealuminzation and low cost for reusing the extractive alkali liquor. The invention is suitable for the dealuminzation of each aluminiferous iron ore, in particular, high aluminium iron ore for reducing the close symbiosis and interdigitating of aluminium-containing minerals and iron-containing minerals, the manufactured iron ore concentrate can be used as the blast furnace ironmaking materials.
Description
Technical field
The present invention relates to a kind ofly, particularly relate to the technology of the iron ore dealuminzation of the tight symbiosis of a kind of aluminum-containing mineral and iron-bearing mineral, embedding cloth relation complexity by the high alumina iron ore method that is equipped with ironmaking with iron ore concentrate made of stones.
Background technology
That the continual and steady development of Iron And Steel Industry presses for is stable, capacity, fine iron ore raw material are supplied with.The iron ore deposit of existing rich ore of China and easily choosing is petered out, and it is poor, thin, assorted that available iron ore deposit is tending towards day by day.Along with the continuous expansion of China's Iron And Steel Industry scale, China has become iron ore importer the biggest in the world, and the quantity of imported iron ore stone has accounted for the over half of China's iron ore total demand.For improving constantly of iron ore import interdependency, become the major hidden danger of China's Iron And Steel Industry economic security.Therefore, press for the dependence technical progress and maximally utilise domestic existing iron ore deposit, the especially present complicated refractory iron ore that does not large-scale develop and utilize as yet, the degree of self-sufficiency of raising iron ore, the pressure of alleviation imported iron ore.
Al in the iron ore
2O
3Content is too high, will have a negative impact to blast-furnace smelting, causes the capacity factor of a blast furnace and output to reduce, and coke ratio raises.Therefore as the agglomerate of blast furnace burden, pellet to Al in the iron-bearing material
2O
3Content has certain requirement.For a long time, do not come into one's own always, domesticly fall the research of aluminium and report less about the alferric ore for the processing treatment of alferric ore and comprehensive utilization.Someone had once carried out the dealuminzation research of alferric ore with the method for physical concentration and magnetizing roasting, but did not obtain significant progress.Because Fe particularly also takes place in some ore in the tight symbiosis of aluminum-containing mineral and iron-bearing mineral in the ore, embedding cloth relation complexity
3+Lattice replace i.e. Al
3+Replace Fe
2O
3In Fe
3+, magnetizing roasting is difficult to make it to dissociate; And the method for employing physical separation, the same effect that can not reach dealuminzation because monomer is difficult to dissociate.
The reserves of China's alferric ore are considerable, are alferric ore resource reasonable, that fully effectively utilize this part reserves to enrich, develop reasonable, effective alferric ore dealuminzation technology, reduce aluminium content and raising iron ore grade in the ore, spy's proposition the present invention.
Summary of the invention
Technical problem to be solved by this invention provide a kind of can reduce aluminium content in the ore effectively and improve the iron ore grade by the high alumina iron ore method that is equipped with ironmaking with iron ore concentrate made of stones.
In order to solve the problems of the technologies described above, the present invention adopt by the high alumina iron ore method that is equipped with ironmaking with iron ore concentrate made of stones, after iron ore was crushed to granularity and accounts for 40%-60% less than 0.074mm, the ratio of 10-40% was with Na by mass percentage
2CO
3With the iron ore mixing, at 900-1050 ℃ of following roasting 10-30min, place in the reactor again, solution by liquid-solid mass ratio L/S=3/1-6/1, NaOH concentration 80-150g/L leaches under 80-150 ℃ temperature, extraction time is 5-30min, the filter cake mass concentration is that 1.0%～15% dilute sulphuric acid leaches under 80-120 ℃ condition after the solid-liquid separation, and extraction time is 10-30min, and solid is iron ore concentrate after the solid-liquid separation.
Adopt the method by the high alumina iron ore iron ore concentrate of ironmaking usefulness fully made of stones of technique scheme, Al in the iron ore concentrate after the solid-liquid separation
2O
3Content can be reduced to about 2%, Na
2O content is less than 0.2%, and the iron grade also increases substantially.
Utilize this to be: one, alferric ore and Na by the principle of high alumina iron ore ironmaking fully made of stones with the method dealuminzation of iron ore concentrate
2CO
3Mixture roasting at high temperature after, Al
2O
3With Na
2CO
3Generate soluble sodium aluminate NaAl (OH)
4, in leaching process, directly enter solution.Two, do not change the Al of solvable sodium aluminate in the roasting process fully into
2O
3After NaOH solution leaches, generate soluble NaAl (OH) with the NaOH reaction
4, make aluminium base form enter solution with sodium aluminate, reach the effect of dealuminzation through solid-liquid separation.
Advantage of the present invention mainly is: be particularly suitable for reducing the content that aluminum-containing mineral and the tight symbiosis of iron-bearing mineral, embedding cloth concern aluminum oxide in the complicated iron ore.Roasting time is short, and extraction time is short, can significantly cut down the consumption of energy, and leaches alkali lye and recycles, and processing cost is low, and dealuminzation is effective.Use the present invention, can make Al in the concentrate
2O
3And Na
2The content of O all reaches the requirement of blast-furnace smelting raw material.
The present invention is applicable to the dealuminzation of various alferric ores, particularly reduces the tight symbiosis of aluminum-containing mineral and iron-bearing mineral, the complicated high alumina iron ore stone of embedding cloth relation, and the iron ore concentrate of preparation can be used as blast furnace ironmaking raw material.
Description of drawings
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail.
Accompanying drawing is a process flow diagram of the present invention.
Embodiment
Embodiment 1, referring to accompanying drawing, and TFe content 55.34%, Al
2O
3The rhombohedral iron ore stone of content 5.26%, after ore grinding to granularity accounted for about 40% less than 0.074mm, 10% ratio was with Na by mass percentage
2CO
3With the iron ore mixing, at 1050 ℃ of following roasting 10min, place in the reactor again, solution by liquid-solid mass ratio L/S=4/1, NaOH concentration 120g/L leaches down at 150 ℃, extraction time is 5min, is that 15% dilute sulphuric acid leaches down at 80 ℃ with mass percentage concentration after the solid-liquid separation, and extraction time is 10min, can obtain TFe content 66.58%, Al after the solid-liquid separation
2O
3Content 1.94%, Na
2The iron ore concentrate of O content 0.13%.
Embodiment 2, referring to accompanying drawing, and TFe content 47.94%, Al
2O
3The rhombohedral iron ore stone of content 10.2% is crushed to granularity and accounts for about 50% less than 0.074mm, and 40% ratio is with Na by mass percentage
2CO
3With the iron ore mixing, at 900 ℃ of following roasting 30min, place in the reactor again, solution by liquid-solid mass ratio L/S=3/1, NaOH concentration 150g/L leaches down at 120 ℃, extraction time is 15min, and the dilute sulphuric acid with 1.0% after the solid-liquid separation leaches down at 100 ℃, and extraction time is 30min, can obtain TFe content 60.43%, Al after the solid-liquid separation
2O
3Content 1.84%, Na
2The iron ore concentrate of O content 0.2%.
Embodiment 3, referring to accompanying drawing, and TFe content 46.34%, Al
2O
3The limonite ore of content 8.46% is crushed to granularity and accounts for about 60% less than 0.074mm, by mass percentage 25% ratio and Na
2CO
3Mixing, at 1000 ℃ of following roasting 15min, place in the reactor again, solution by liquid-solid mass ratio L/S=6/1, NaOH concentration 80g/L leaches down at 80 ℃, extraction time is 30min, and the dilute sulphuric acid with 3.5% after the solid-liquid separation leaches down at 120 ℃, and extraction time is 15min, can obtain TFe content 62.83%, Al after the solid-liquid separation
2O
3Content 1.93%, Na
2The iron ore concentrate of O content 0.15%.
Claims (1)
- A kind of by the high alumina iron ore method that is equipped with ironmaking with iron ore concentrate made of stones, it is characterized in that: after iron ore was crushed to granularity and accounts for 40%-60% less than 0.074mm, the ratio of 10-40% was with Na by mass percentage 2CO 3With the iron ore mixing, at 900-1050 ℃ of following roasting 10-30min, place in the reactor again, solution by liquid-solid mass ratio L/S=3/1-6/1, NaOH concentration 80-150g/L leaches under 80-150 ℃ temperature, extraction time is 5-30min, the filter cake mass concentration is that 1.0%～15% dilute sulphuric acid leaches under 80-120 ℃ condition after the solid-liquid separation, and extraction time is 10-30min, and solid is iron ore concentrate after the solid-liquid separation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100348452A CN100540694C (en) | 2007-04-28 | 2007-04-28 | A kind of by the high alumina iron ore method that is equipped with ironmaking with iron ore concentrate made of stones |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100348452A CN100540694C (en) | 2007-04-28 | 2007-04-28 | A kind of by the high alumina iron ore method that is equipped with ironmaking with iron ore concentrate made of stones |
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| Publication Number | Publication Date |
|---|---|
| CN101037722A true CN101037722A (en) | 2007-09-19 |
| CN100540694C CN100540694C (en) | 2009-09-16 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101293220B (en) * | 2008-06-16 | 2010-04-14 | 中南大学 | Additive agent for iron-aluminum separation for high-alumina iron ore |
| CN103949335A (en) * | 2014-04-23 | 2014-07-30 | 鞍钢集团矿业公司 | Method for recleaning of vanadium-titanium magnetite concentrate by using alkaline leaching, grading and magnetic separation |
| CN103966422A (en) * | 2014-04-23 | 2014-08-06 | 鞍钢集团矿业公司 | Method for re-concentrating vanadium-titanium magnetite concentrate through calcination, alkaline leaching, acid pickling and re-selection |
| CN103962222A (en) * | 2014-04-23 | 2014-08-06 | 鞍钢集团矿业公司 | Method for recleaning of vanadium-titanium magnetite concentrates through calcination, alkaline leaching, desliming and magnetic separation |
| CN109913641A (en) * | 2019-03-18 | 2019-06-21 | 中南大学 | A method of comprehensive utilization high alumina iron ore |
| CN110408773A (en) * | 2019-08-13 | 2019-11-05 | 昆明理工大学 | A method of strengthening high alumolimonite ferro-aluminum separating effect using sodium salt |
| WO2020211042A1 (en) * | 2019-04-15 | 2020-10-22 | 东北大学 | Method for dealuminizing and desilicating high-aluminum iron ore concentrate by using sodium roasting-water leaching |
-
2007
- 2007-04-28 CN CNB2007100348452A patent/CN100540694C/en active Active
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101293220B (en) * | 2008-06-16 | 2010-04-14 | 中南大学 | Additive agent for iron-aluminum separation for high-alumina iron ore |
| CN103949335A (en) * | 2014-04-23 | 2014-07-30 | 鞍钢集团矿业公司 | Method for recleaning of vanadium-titanium magnetite concentrate by using alkaline leaching, grading and magnetic separation |
| CN103966422A (en) * | 2014-04-23 | 2014-08-06 | 鞍钢集团矿业公司 | Method for re-concentrating vanadium-titanium magnetite concentrate through calcination, alkaline leaching, acid pickling and re-selection |
| CN103962222A (en) * | 2014-04-23 | 2014-08-06 | 鞍钢集团矿业公司 | Method for recleaning of vanadium-titanium magnetite concentrates through calcination, alkaline leaching, desliming and magnetic separation |
| CN103966422B (en) * | 2014-04-23 | 2016-03-02 | 鞍钢集团矿业公司 | Calcining, alkali leaching, pickling and gravity treatment is utilized to select the method for v-ti magnetite concentrate again |
| CN109913641A (en) * | 2019-03-18 | 2019-06-21 | 中南大学 | A method of comprehensive utilization high alumina iron ore |
| CN109913641B (en) * | 2019-03-18 | 2020-02-18 | 中南大学 | Method for comprehensively utilizing high-aluminum iron ore |
| WO2020211042A1 (en) * | 2019-04-15 | 2020-10-22 | 东北大学 | Method for dealuminizing and desilicating high-aluminum iron ore concentrate by using sodium roasting-water leaching |
| CN110408773A (en) * | 2019-08-13 | 2019-11-05 | 昆明理工大学 | A method of strengthening high alumolimonite ferro-aluminum separating effect using sodium salt |
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| Publication number | Publication date |
|---|---|
| CN100540694C (en) | 2009-09-16 |
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