CN103691550A - Beneficiation method of ilmenite - Google Patents
Beneficiation method of ilmenite Download PDFInfo
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- CN103691550A CN103691550A CN201310701351.0A CN201310701351A CN103691550A CN 103691550 A CN103691550 A CN 103691550A CN 201310701351 A CN201310701351 A CN 201310701351A CN 103691550 A CN103691550 A CN 103691550A
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Abstract
The invention discloses a beneficiation method of ilmenite and relates to the method for performing beneficiation on an ilmenite raw ore to prepare iron ore concentrate and ilmenite concentrate. The beneficiation method is characterized in that the beneficiation process comprises the following steps of (1) smashing the ilmenite raw ore; (2) grinding the ilmenite raw ore; (3) performing alkaline leaching pretreatment under conditions of water adding, temperature rising, oxygen adding and pressurization; (4) filtering ore pulp after the alkaline leaching pretreatment; (5) washing a filtered filter residue phase and performing ore grinding; (6) utilizing a washbox and performing magnetic separation to obtain the iron ore concentrate and the ilmenite concentrate. According to the method, dense symbiosis features of titanium and iron and isomorphism occurrence features of vanadium are damaged from the source of vanadium titanium magnetite ores by means of the treatment procedure, mineral transformation of the vanadium titanium magnetite is achieved, dissociation on lattice levels of titanium and iron is achieved, and the high-quality iron ore concentrate and the low-iron ilmenite concentrate can be obtained through a magnetic separation process and ore grinding. Alkali medium utilized by pretreatment can be recycled, therefore, influence of the process on the environment is small, and the beneficiation method has good application prospects.
Description
Technical field
The beneficiation method of a kind of ilmenite of the present invention, relates to the method that iron ore concentrate and ilmenite concentrate are prepared in the ore dressing of a kind of ilmenite raw ore.
Background technology
Ilmenite reserves are quite abundant, mineral resources main in World Titanium resource, in ilmenite general approximately 57%, iron is composed and is existed in titanomagnetite (nFeTi03.mFe304), approximately 40% tax exists in ilmenite (FeTi03), and the occurrence characteristics of mineral has determined to realize from source the separation of titanium, iron.In existing iron selection technique, titanomagnetite enters ilmenite concentrate, and ilmenite enters iron ore concentrate.Admiring in iron ore concentrate enters blast furnace slag (containing Ti02 up to more than 22%) at ironmaking processes, and owing to forming vitreum, Ti02 has lost clean property and cannot economic recovery; Iron Iron Mine fast process, because fine fraction (19 microns) iron iron ore reclaims difficulty, the fast rate of recovery also only has 18%.In addition, in the mineral of iron deficiency ore deposit, ilmenite and dauphinite (MgTi03) eutectic, cause ilmenite concentrate grade compared with low and CaO+MgO up to 6 ~ 8%, can not be directly as the raw material of boiling oxidizing process titanium white.Because utilization of resources rate is low, the annual solid waste producing of Panxi Diqu reaches more than 4,000 ten thousand tons.
The molten minute new technological process of rotary hearth furnace coal-based direct reduction one electric furnace of recent development, compare with traditional blast furnace process, have that flow process is short, energy consumption is low, environmental pollution is little, can effectively improve iron, iron, famine, scrupulously and respectfully reclaim and the advantage such as accumulation rate, just cling to hungry ferromagnetic iron ore deposit comprehensive utilization degree and bring up to a new height.Hungry iron iron ore to iron content 56 ~ 58% is tested, obtain more than 90% reduzate of degree of metalization, the hungry rate of recovery is 80% (a little more than blast furnace one converter process), rich scum Ti02 is 50 ~ 55%, in iron ore concentrate, iron enriching and recovering rate is greater than 85%, has tentatively solved the difficult problem that blast furnace process iron can not enrichment.But the plot ratio intrinsic due to rotary hearth furnace is low, temperature distributing disproportionation is even in stove, the defects such as difficulty maximize, in addition through the rich scum component of molten minute output of electric furnace and ore deposit mutually complicated, calcium steamed bun aluminium silicone content is very high, is difficult to utilize traditional sulfuric acid process and oxidizing process process economics effectively to produce iron white powder.
By above analysis, can find out, if not from selecting the source of this conventional processes of iron operation to carry out the change of essence, the economic utilization level that wants significantly to improve ilmenite hardly may.Only from the source of vanadium titano-magnetite mineral, destroy iron, the fine and close characteristic of symbiosis of titanium and the tax of the isomorph of vanadium and deposit characteristic, realize dissociating in mineral transition of vanadium titano-magnetite and iron, iron lattice aspect, just likely significantly improve the level of comprehensive utilization of vanadium, titanium resource.
summary of the invention
The object of the invention be exactly overcome above-mentioned oneself have the deficiency in technology, a kind of rate of recovery that can effectively improve titanium and iron in vanadium titano-magnetite is provided, technique is simple, can be effectively iron ore concentrate and the lower iron ore concentrate of iron content be carried out to the beneficiation method of the iron iron ore of sorting, good operability, cleaner production.
To achieve these goals, the present invention has adopted following technical scheme:
A beneficiation method for ilmenite, is characterized in that the step of its ore dressing process comprises successively:
(1) ilmenite raw ore is pulverized;
(2) by the ilmenite raw ore ore grinding after pulverizing;
(3) at Jia Shui, heat, carry out alkali under oxygenation, pressurized conditions and soak pretreatment;
(4) alkali is soaked to pretreatment after ore pulp filter;
(5) after the filter residue filtering washs mutually, then carry out ore grinding;
(6) hotching obtains iron ore concentrate and iron ore concentrate.
The pulverizing raw ore of above-described step (1) obtains the ore particle of 500 mesh sieves.
The grinding particle size of above-described step (1) is 90% to be less than 200 mesh sieves.
Above-described oblique scraper plate is uniformly distributed and arranges more than three at the inwall of drying.
Under the adding water, heat of above-described step (3), oxygenation, pressurized conditions, carrying out the process conditions that alkali soaks preprocessing process is: processing is that sodium hydroxid, hydroxide are raised, calcium hydroxide with alkali, initial total alkali concn is 450g/L-550g/L, the solid mass ratio of pulp slurry is 1-8: 1, gross pressure is 3000kPa-5000kPa, partial pressure of oxygen is 900kPa-1400kPa, temperature is 100 0C-150 ° C, and pretreatment time is 4-5 hour.
Above-described step (4) adopts dense or filter to filter, and the solution obtaining directly returns to step (2).
Above-described step (5), the dense ore pulp that step (4) is obtained or filter cake are through dense washing or filter pulping and washing, washings directly return to step (2), and after filter residue washs mutually, then the granularity of carrying out ore grinding is 99% to be less than 200 mesh sieves.
Above: described step (5), the ore pulp by step (4) milled, carries out hotching, enters ore deposit pulp solids mass concentration and is controlled at 10% ~ 20%, obtains iron ore concentrate and is the concentrate of the titaniferous of mine tailing.
Beneficial effect of the present invention:
Method of the present invention, from the source of iron iron ore mineral, adopt pretreating process destruction iron, the fine and close characteristic of symbiosis of iron and the tax of the isomorph of vanadium to deposit characteristic, make dissociating in titanium, iron lattice aspect, by the mode of pulverizing-Separation of Solid and Liquid one washing one mill ore magnetic selection, realize again the separation of ferrotianium, the alkali concn using in technique is higher, and pre-processing device is had relatively high expectations.But the present invention compares and has obvious advantage with traditional processing vanadium iron magnetite raw ore technology.
(1) to obtain iron content higher in the present invention, and the iron ore concentrate that iron content is lower is conducive to blast furnace ironmaking.
(2), because the iron grade in iron ore concentrate is low, so can obtain a more high-grade iron ore concentrate, improve the rate of recovery of admiring.
(3) alkali that pretreatment of the present invention is used recycles, and has reduced greatly the energy consumption of producing, and has improved the operability of technique.The present invention proposes and a kind ofly take ilmenite raw ore as raw material, adopt pretreatment process, from the source of the ferromagnetic iron ore mineral of famine, destroy iron, the fine and close characteristic of symbiosis of titanium and the tax of the isomorph of vanadium and deposit characteristic, thereby the mineral transition of realizing vanadium iron magnetite, make dissociating in titanium, iron lattice aspect, and then pass through ore grinding, magnetic separation process obtains high-quality iron ore concentrate and the lower iron ore concentrate of iron content, pretreatment alkaline media used can be recycled, and technique is little on the impact of environment, and application prospect is optimistic.
Accompanying drawing explanation
Fig. 1 process chart of the present invention.
The specific embodiment
A kind of beneficiation method of fast iron ore, take ilmenite raw ore as raw material, after first pulverizing, under the acting in conjunction by high temperature, oxygen, alkaline media, obtain solid intermediate product ore pulp, solid intermediate product more after filtration-washing after, then obtain ilmenite concentrate and iron ore concentrate through ore grinding-jigging machine and magnetic separation.The method comprises the steps:
1, by wet-milling to granularity, be the ferromagnetic green ore that 90% left and right is less than 200 mesh sieves, under the effect of oxygen and alkaline media, carry out Pretreatment with Pressurized, processing is that sodium hydroxid, hydroxide are raised, calcium hydroxide with alkali, initial total alkali concn is 450g/L-550g/L, the solid mass ratio of pulp slurry is 1-7:1, and gross pressure is 3000kPa-5000kPa, and partial pressure of oxygen is 900kPa-1400kPa, temperature is 1000C ~ 1500 ° C, and pretreatment time is 4-5 hour.Obtain pretreatment ore pulp and carry out step 3;
2, ore pulp step 2 being obtained filters by dense or filter, the solution obtaining directly returns to step 2, the dense ore pulp obtaining or filter cake are through dense washing or filter pulping and washing, obtain solid intermediate product and proceed step 4, and washings directly return to step 2;
3, intermediate product step 2 being obtained, utilizes ball mill wet-milling, is milled to granularity and is 99% and be less than 200 mesh sieves, and ore grinding water circulation is used, and the intermediate product of milled is proceeded step 4.
4, by the solid intermediate product ore pulp of step 3 milled, while carrying out jigging machine and magnetic separation ore dressing, magnetic field intensity is controlled at 800-2000 oersted, enter ore deposit ore pulp slurry solid masses concentration and be controlled at 10-20%, obtain concentrate pulp and mine tailing ore pulp, in the mode by dense filtration, obtain iron ore concentrate and contain the concentrate of admiring.
With reference to the accompanying drawings, the specific embodiment of the present invention is further described in detail.
Embodiment 1:
The ilmenite raw ore iron content 32.16% of processing, containing ferrous oxide 12.11%, after the processing of circulating and recovering, liquid and wash water solution fill into a small amount of hydroxide and raise and calcium oxide, making alkali concn is 450g/L, the vanadium titano-magnetite that is less than 200 mesh sieves with 90% particle diameter mixes, pressurization is warming up to 1000C, logical oxygen pretreatment 4 hours, through flash cooled, obtain pretreatment ore pulp, washing obtains solid-phase intermediate after filtration, again through ball mill ball milling, it is 59.31% that while magnetic separation under the magnetic field of 800 oersteds obtains iron content, iron ore concentrate containing ferrous oxide 4.01%, obtain the iron ore concentrate containing titanium dioxide 20. 15% simultaneously.The rate of recovery of iron is 82.23%, and the rate of recovery of titanium is 85.12%.
Embodiment 2:
The ilmenite raw ore iron content 32.16% of processing, containing ferrous oxide 12.11%, after the processing of circulating and recovering, liquid and wash water solution fill into a small amount of hydroxide and raise and calcium oxide, making alkali concn is 500g/L, the vanadium titano-magnetite that is less than 200 mesh sieves with 90% particle diameter mixes, pressurization is warming up to 1200C, logical oxygen pretreatment 4.5 hours, through flash cooled, obtain pretreatment ore pulp, washing obtains solid-phase intermediate after filtration, again through ball mill ball milling, it is 61.1% that while magnetic separation under the magnetic field of 900 oersteds obtains iron content, iron ore concentrate containing ferrous oxide 3.7%, obtain the iron ore concentrate containing titanium dioxide 20% simultaneously.The rate of recovery of iron is 78.5%, and the rate of recovery of titanium is 87.8%.
Embodiment 3:
The ilmenite raw ore iron content 38.32% of processing, containing ferrous oxide 10.35%, after the processing of circulating and recovering, liquid and wash water solution fill into a small amount of hydroxide and raise and calcium oxide, making alkali concn is 550g/L, the vanadium titano-magnetite that is less than 200 mesh sieves with 90% particle diameter mixes, pressurization is warming up to 1500C, logical oxygen pretreatment 5 hours, through flash cooled, obtain pretreatment ore pulp, washing obtains solid-phase intermediate after filtration, again through ball mill ball milling, it is 62.31% that while magnetic separation under the magnetic field of 1000 oersteds obtains iron content, iron ore concentrate containing ferrous oxide 3.89%, obtain the iron ore concentrate containing titanium dioxide 20. 02% simultaneously.The rate of recovery of iron is 79.98%, and the rate of recovery of titanium is 80.99%.
Above-described embodiment, is more preferably one of concrete mode of the present invention, and the common variation that those skilled in the art carry out within the scope of technical solution of the present invention and replacement all should be included in protection scope of the present invention.
Claims (7)
1. a beneficiation method for ilmenite, is characterized in that the step of its ore dressing process comprises successively:
(1) ilmenite raw ore is pulverized;
(2) by the ilmenite raw ore ore grinding after pulverizing;
(3) at Jia Shui, heat, carry out alkali under oxygenation, pressurized conditions and soak pretreatment;
(4) alkali is soaked to pretreatment after ore pulp filter;
(5) after the filter residue filtering washs mutually, then carry out ore grinding;
(6) jigging machine and magnetic separation ore dressing obtain iron ore concentrate and iron ore concentrate.
2. according to the beneficiation method of a kind of ilmenite described in claim 1, it is characterized in that: the pulverizing raw ore of described step (1) obtains the ore particle of 500 mesh sieves.
3. according to the beneficiation method of a kind of ilmenite described in claim 1, it is characterized in that: the grinding particle size of described step (1) is 90% to be less than 200 mesh sieves.
4. according to the beneficiation method of a kind of ilmenite described in claim 1, it is characterized in that: under the adding water, heat of described step (3), oxygenation, pressurized conditions, carrying out the process conditions that alkali soaks preprocessing process is: processing is that sodium hydroxid, hydroxide are raised, calcium hydroxide with alkali, initial total alkali concn is 450g/L-550g/L, the solid mass ratio of pulp slurry is 1-7: 1, gross pressure is 3000kPa-5000kPa, partial pressure of oxygen is 900kPa-1400kPa, temperature is 1000C-1500 ° C, and pretreatment time is 4-5 hour.
5. according to the beneficiation method of a kind of ilmenite described in claim 1, it is characterized in that: described step (4) adopts dense or filter to filter, and the solution obtaining directly returns to step (2).
6. according to the beneficiation method of a kind of ilmenite described in claim 1, it is characterized in that: described step (5), the dense ore pulp that step (4) is obtained or filter cake are through dense washing or filter pulping and washing, washings directly return to step (2), after filter residue washs mutually, then the granularity of carrying out ore grinding is 99% to be less than 200 mesh sieves.
7. according to the beneficiation method of a kind of ilmenite described in claim 1, it is characterized in that: described step (5), by the ore pulp of step (4) milled, carry out hotching, enter ore deposit pulp solids mass concentration and be controlled at 10%-20%, obtain iron ore concentrate and be the concentrate of the titaniferous of mine tailing.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103952549A (en) * | 2014-04-23 | 2014-07-30 | 鞍钢集团矿业公司 | Method for recleaning vanadium titanium magnetite concentrate by using alkaline leaching, pickling and reverse flotation |
| CN103952532A (en) * | 2014-04-23 | 2014-07-30 | 鞍钢集团矿业公司 | Method for recleaning vanadium-titanium magnetite concentrate by using alkaline leaching and grading |
| CN103962224A (en) * | 2014-04-23 | 2014-08-06 | 鞍钢集团矿业公司 | Vanadium-titanium magnetite concentrate recleaning method realized through alkaline leaching, acid pickling and combined magnetic-gravity separation |
| CN103962228A (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, classification and gravity concentration |
| CN103962223A (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 and classification |
| CN103962221A (en) * | 2014-04-23 | 2014-08-06 | 鞍钢集团矿业公司 | Vanadium-titanium magnetite concentrate recleaning method realized through alkaline leaching, classification and reverse flotation |
| CN104894371A (en) * | 2015-06-12 | 2015-09-09 | 鞍钢集团矿业公司 | Method for recleaning of vanadium-titanium magnetite concentrate through oxidation alkaline leaching, acid pickling and reselection |
| CN104984817A (en) * | 2015-06-12 | 2015-10-21 | 鞍钢集团矿业公司 | Method of separating vanadium-titanium magnetite concentrate by using calcining, oxidation and alkaline leaching, desliming and gravity separation |
| CN105013608A (en) * | 2015-06-12 | 2015-11-04 | 鞍钢集团矿业公司 | Vanadium-titanium magnetite concentrate re-concentration method achieved through oxidation alkaline leaching, acid pickling, desliming and gravity and magnetism |
| CN109107755A (en) * | 2018-08-28 | 2019-01-01 | 昆明冶金高等专科学校 | A kind of dew adopts ferrotianium sand iron ore desliming process |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103952549B (en) * | 2014-04-23 | 2016-01-20 | 鞍钢集团矿业公司 | Alkali leaching, pickling and reverse flotation is utilized to select the method for v-ti magnetite concentrate again |
| CN103952532B (en) * | 2014-04-23 | 2016-01-20 | 鞍钢集团矿业公司 | Utilize the method that alkali soaks, v-ti magnetite concentrate is selected in classification again |
| CN103962224A (en) * | 2014-04-23 | 2014-08-06 | 鞍钢集团矿业公司 | Vanadium-titanium magnetite concentrate recleaning method realized through alkaline leaching, acid pickling and combined magnetic-gravity separation |
| CN103962228A (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, classification and gravity concentration |
| CN103962223A (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 and classification |
| CN103962221A (en) * | 2014-04-23 | 2014-08-06 | 鞍钢集团矿业公司 | Vanadium-titanium magnetite concentrate recleaning method realized through alkaline leaching, classification and reverse flotation |
| CN103952532A (en) * | 2014-04-23 | 2014-07-30 | 鞍钢集团矿业公司 | Method for recleaning vanadium-titanium magnetite concentrate by using alkaline leaching and grading |
| CN103962224B (en) * | 2014-04-23 | 2016-07-06 | 鞍钢集团矿业公司 | Alkali leaching, pickling and magnetic reconnection is utilized to close the method selecting v-ti magnetite concentrate again |
| CN103962228B (en) * | 2014-04-23 | 2016-06-01 | 鞍钢集团矿业公司 | Utilize calcining, alkali leaching, classification and heavily select the method selecting v-ti magnetite concentrate again |
| CN103952549A (en) * | 2014-04-23 | 2014-07-30 | 鞍钢集团矿业公司 | Method for recleaning vanadium titanium magnetite concentrate by using alkaline leaching, pickling and reverse flotation |
| CN103962221B (en) * | 2014-04-23 | 2016-03-30 | 鞍钢集团矿业公司 | Alkali leaching, classification and reverse flotation is utilized to select the method for v-ti magnetite concentrate again |
| CN104984817A (en) * | 2015-06-12 | 2015-10-21 | 鞍钢集团矿业公司 | Method of separating vanadium-titanium magnetite concentrate by using calcining, oxidation and alkaline leaching, desliming and gravity separation |
| CN104894371A (en) * | 2015-06-12 | 2015-09-09 | 鞍钢集团矿业公司 | Method for recleaning of vanadium-titanium magnetite concentrate through oxidation alkaline leaching, acid pickling and reselection |
| CN105013608A (en) * | 2015-06-12 | 2015-11-04 | 鞍钢集团矿业公司 | Vanadium-titanium magnetite concentrate re-concentration method achieved through oxidation alkaline leaching, acid pickling, desliming and gravity and magnetism |
| CN109107755A (en) * | 2018-08-28 | 2019-01-01 | 昆明冶金高等专科学校 | A kind of dew adopts ferrotianium sand iron ore desliming process |
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Application publication date: 20140402 |