CN103041921A - Method for extracting iron ore concentrate under anhydrous condition - Google Patents
Method for extracting iron ore concentrate under anhydrous condition Download PDFInfo
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- CN103041921A CN103041921A CN2012105599918A CN201210559991A CN103041921A CN 103041921 A CN103041921 A CN 103041921A CN 2012105599918 A CN2012105599918 A CN 2012105599918A CN 201210559991 A CN201210559991 A CN 201210559991A CN 103041921 A CN103041921 A CN 103041921A
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Abstract
The invention discloses a method for extracting iron ore concentrate under anhydrous condition. The method comprises the steps of rude ore crushing, screen separation, preselection, ball milling, grading, high-pressure pneumatic separation and magnetic separation and the like. During high-pressure pneumatic separation and magnetic separation, high-pressure air obliquely blows in through a high-pressure air inlet from the bottom up, blows falling semi-refined ore concentrate to a dry-type selection magnetic separator, large-particle tailings in the semi-refined ore concentrate falls to the bottom of a housing under the self gravity action, fine-particle tailings are discharged along with air from the top opening of the housing and are collected, iron ore concentrate in the semi-refined ore concentrate is adsorbed by the dry-type selection magnetic separator, and finally, iron or concentrate is extracted. By adopting the method to extract iron ore concentrate, water utilization is radically omitted, water resource waste and water pollution are avoided, extraction of iron ore concentrate in mining regions without water sources in deserts and other arid areas is particularly satisfied, and exploitation of iron ore in deserts and other arid areas can be favorably realized.
Description
Technical field
The present invention relates to the concentrate extractive technique field in the ore dressing, relate in particular to the method for extracting fine iron breeze under a kind of anhydrous condition.
Background technology
The lower ore of valuable metal grade is through mechanical enrichment or physical enrichment, process such as ore dressing process such as radiometric sorting, gravitational method ore dressing, flotation, obtain the higher ore of valuable metal grade of certain productive rate, this part enrichment the ore of valuable metal be concentrate.
The iron ore concentrate extracting method of prior art is: iron ore enters the ball mill ball milling through crusher in crushing is laggard, and the iron ore particle behind the ball milling adds a large amount of water and forms ore pulp again, then with wet magnetic separator ore pulp is carried out wet magnetic separation and extracts iron ore concentrate.This extracting mode of iron ore concentrate not only needs to consume the water resource of a large amount of preciousnesses, causes the waste of water resource, and the Tailings Slurry that forms in the leaching process also can pollute the water quality of surrounding environment.Particularly for the iron ore of the arid area of the water resource famines such as desert, minery and the ore dressing district several hundred kilometers of often being separated by, need and to extract iron ore concentrate in the ore dressing district that the raw ore of adopting without the minery at water source is transported to the water source, freight is high, extraction cost is high, and the mode of wet magnetic separation extraction iron ore concentrate has limited the exploitation scale of arid area iron ore deposit.
Summary of the invention
Technical problem to be solved by this invention is: the method for extracting fine iron breeze under a kind of anhydrous condition is provided, with saving water resource, reduces the water pollution to surrounding environment.
For solving the problems of the technologies described above, technical scheme of the present invention is that the method for extracting fine iron breeze under the anhydrous condition may further comprise the steps:
(1) fragmentation: with disintegrating machine raw ore is carried out fragmentation, get the raw ore ore particle;
(2) screening: the raw ore ore particle is sieved with vibratory sieve;
(3) preliminary election: screening obtains≤and the raw ore ore particle of 5mm drops down onto first order ribbon conveyer, the driven cylinder that is positioned at described first order ribbon conveyer discharge end is the highfield magnetic separation roller, described highfield magnetic separation roller carries out sending into dry type highfield magnetic separator after the one-level magnetic separation preliminary election to the raw ore ore particle on the described first order ribbon conveyer and carries out the secondary magnetic separation preliminary election, gets half concentrate grain;
(4) ball milling: the half concentrate grain that step (3) is made is sent into dry ball and is carried out ball milling, gets half fine ore;
(5) classification: half fine ore that step (4) is made carries out classification;
(6) high pressure selection by winnowing magnetic separation: the fineness after step (5) classification 〉=100 purposes, half fine ore is delivered to high pressure selection by winnowing concentration equipment, and described high pressure selection by winnowing concentration equipment comprises
The dry type cleaning magnetic separator, described dry type cleaning magnetic separator is provided with case outward, offer material inlet on the antetheca of described case, described material inlet is corresponding to the discharge end position of described second level ribbon conveyer, below corresponding to described material inlet on the antetheca of described case offers the high-pressure blast air inlet, described high-pressure blast air inlet is obliquely installed from bottom to top in the inboard of described case antetheca, is provided with open top on the roof of described case;
In described case, tilt to be blown into high-pressure blast by described high-pressure blast air inlet from bottom to top, half fine ore during described high-pressure blast will fall blows to described dry type cleaning magnetic separator, bulky grain mine tailing in described half fine ore falls to described case bottom in the self gravitation effect, fine grained mine tailing in described half fine ore is discharged with the wind from the open top of described case, fine iron breeze in described half fine ore is adsorbed by described dry type cleaning magnetic separator, thereby finally extracts fine iron breeze.
As preferably, in the described step (3), the magnetic induction intensity of described highfield magnetic separation roller is 3000-4000 Gauss; The magnetic induction intensity of described highfield magnetic separator is 3000-4000 Gauss.
As preferably, in the described step (6), the magnetic induction intensity of described dry type cleaning magnetic separator is 2500-3000 Gauss; The blast of described high-pressure blast is 2500-3000 Pascal.
As preferably, in the described step (2), after the screening＞the raw ore ore particle of 5mm returns to step (1), after the fragmentation more successively implementation step (2) to step (6).
As preferably, in the described step (5), after the classification＜100 purposes, half fine ore returns to step (4), behind the ball milling more successively implementation step (5) to step (6).
As preferably, described disintegrating machine adopts jaw crusher.
As preferably, described vibratory sieve adopts the circle sieve that shakes.
As further preferred, the method of extracting fine iron breeze under the described anhydrous condition also comprises step (7), low pressure selection by winnowing magnetic separation step, with low pressure selection by winnowing concentration equipment the fine iron breeze in the fine grained mine tailing of discharging in the described step (6) is extracted, described low pressure selection by winnowing concentration equipment is identical with described high pressure selection by winnowing concentration equipment structure, during implementation step (7), in described case, be blown into low-pressure air.
As further preferred, the blast of described low-pressure air is 1000-2000 Pascal.
Owing to adopted technique scheme, extract the method for fine iron breeze under the anhydrous condition of the present invention in pre-selection stage, driven cylinder by first order ribbon conveyer discharge end is that the highfield magnetic separation roller carries out one-level magnetic separation preliminary election to the raw ore ore particle, removed the part mine tailing, improved production efficiency, the highfield magnetic separator carries out the concentrate grade of the half concentrate grain that obtains after the secondary magnetic separation preliminary election and brings up to more than 30%; After the half fine ore classification that obtains behind the half concentrate grain ball milling, fineness 〉=100 purposes, half fine ore is transported to high pressure selection by winnowing concentration equipment, because the high-pressure blast air inlet is obliquely installed from bottom to top on the case antetheca, when carrying out the magnetic separation of high pressure selection by winnowing, in case, tilt to be blown into high-pressure blast by the high-pressure blast air inlet from bottom to top, half fine ore during high-pressure blast will fall blows to the dry type cleaning magnetic separator, wherein the bulky grain mine tailing in half fine ore falls to the bottom of case in the self gravitation effect, fine grained mine tailing lighter in half fine ore is discharged with the wind from the open top of case, fine iron breeze in half fine ore is then adsorbed by the dry type cleaning magnetic separator, thereby finally extract fine iron breeze, production shows that the concentrate grade of the fine iron breeze that extracts after the magnetic separation of high pressure selection by winnowing is brought up to more than 60%.
When low pressure selection by winnowing magnetic separation step further is set, can the fine iron breeze in the fine grained mine tailing of discharging in the high pressure selection by winnowing magnetic separation step and collecting fully be extracted, production shows, from crushing raw ore to finally extracting fine iron breeze by the magnetic separation of high pressure selection by winnowing and the magnetic separation of low pressure selection by winnowing, the concentrate grade of fine iron breeze is brought up to more than 65%.
Extract the method for fine iron breeze under the anhydrous condition of the present invention, broken away from the dependence to water resource, thoroughly removed the link of water, avoided the waste of water resource, reduced the water pollution to surrounding environment.The iron ore that especially can satisfy the arid areas such as desert can extract fine iron breeze in the minery without the water source, has reduced cost of transportation and extraction cost.
Description of drawings
Fig. 1 is the process flow diagram of the embodiment of the invention;
Fig. 2 is the high pressure selection by winnowing concentration equipment structural representation of inventive embodiments;
Among the figure: the 1-case; The 11-open top; 12-high-pressure blast air inlet; 2-dry type cleaning magnetic separator; 3-third level ribbon conveyer; 4-second level ribbon conveyer; 5-half fine ore; 6-bulky grain mine tailing; 7-fine grained mine tailing; The 8-fine iron breeze.
The specific embodiment
Below in conjunction with drawings and Examples the present invention is done nonrestrictive further specifying.
Figure 1 shows that the method technological process of extracting fine iron breeze under the anhydrous condition of the present invention, the method for extracting fine iron breeze under the anhydrous condition of the present invention may further comprise the steps:
(1) fragmentation: with disintegrating machine raw ore is carried out fragmentation, get the raw ore ore particle.Disintegrating machine in the present embodiment adopts jaw crusher, and the crushing efficiency of jaw crusher is high, is used for raw ore is carried out coarse crushing.
(2) screening: the raw ore ore particle is sieved with vibratory sieve.Vibratory sieve in the present embodiment adopts the circle sieve that shakes, and the circle sieve that shakes is a kind of new high-efficiency vibratory sieve, have reliable in structure, exciting force is strong, screening efficiency is high, vibrating noise is little, sturdy and durable, easy to maintenance, the characteristics such as use safely.
(3) preliminary election: by circle shake that sieve screening obtains＞the raw ore ore particle of 5mm returns to step (1) and carries out fragmentation; By circle shake that sieve screening obtains≤the raw ore ore particle of 5mm drops down onto first order ribbon conveyer, wherein, the driven cylinder that is positioned at first order ribbon conveyer discharge end is a highfield magnetic separation roller, this highfield magnetic separation roller carries out sending into dry type highfield magnetic separator after the one-level magnetic separation preliminary election to the raw ore ore particle on the first order ribbon conveyer and carries out the secondary magnetic separation preliminary election, gets half concentrate grain.Wherein, the magnetic induction intensity of highfield magnetic separation roller is in 3000-4000 Gauss; The magnetic induction intensity of highfield magnetic separator is in 3000-4000 Gauss.
(4) ball milling: the half concentrate grain that step (3) is made is sent into dry ball and is carried out ball milling, gets half fine ore.
(5) classification: half fine ore that step (4) makes is carried out classification with grader or oscillating flat sieve.
(6) high pressure selection by winnowing magnetic separation: after step (5) classification＜100 purposes, half fine ore returns to step (4) and carries out ball milling; Fineness after step (5) classification 〉=100 purposes, half fine ore is delivered to high pressure selection by winnowing concentration equipment by second level ribbon conveyer 4, and as shown in Figure 2, wherein high pressure selection by winnowing concentration equipment comprises
Dry type cleaning magnetic separator 2, outside dry type cleaning magnetic separator 2, be provided with case 1, antetheca at case 1 offers material inlet, this material inlet is corresponding to the discharge end position of second level ribbon conveyer 4, offering high-pressure blast air inlet 12 below corresponding to material inlet on the antetheca of case 1, this high-pressure blast air inlet 12 is obliquely installed from bottom to top in the inboard of case 1 antetheca, roof at case 1 is provided with open top 11, rear wall at case 1 is provided with rear aperture, passes the below that this rear aperture and its feed end correspondence are arranged at the concentrate exit side of dry type cleaning magnetic separator 2 for delivery of the third level ribbon conveyer 3 of fine iron breeze 8.
When carrying out the magnetic separation of high pressure selection by winnowing, half fine ore 5 falls from the discharge end of second level ribbon conveyer 4, in case 1, tilt to be blown into high-pressure blast by high-pressure blast air inlet 12 from bottom to top, half fine ore 5 during high-pressure blast will fall blows to dry type cleaning magnetic separator 2, wherein, bulky grain mine tailing 6 in half fine ore 5 falls to the bottom of case 1 in the self gravitation effect, fine grained mine tailing 7 in half fine ore 5 is discharged with the wind and is collected from the open top 11 of case 1, fine iron breeze in half fine ore 5 is then by 2 absorption of dry type cleaning magnetic separator and thereupon rotation, when going to the bottom, fine iron breeze 8 breaks away from the magnetic separation zone of dry type cleaning magnetic separator 2 and drops down onto on the third level ribbon conveyer 3, thereby finally extract fine iron breeze 8, be transported to afterwards subsequent handling and collect.
Wherein, the magnetic induction intensity of dry type cleaning magnetic separator 2 is in 2500-3000 Gauss; The blast of high-pressure blast is 2500-3000 Pascal.
The method of extracting fine iron breeze under the anhydrous condition of present embodiment also comprises step (7), it is low pressure selection by winnowing magnetic separation step, with low pressure selection by winnowing concentration equipment the fine iron breeze in the fine grained mine tailing of discharging in the step (6) and collecting is extracted, wherein, the blast of low-pressure air is 1000-2000 Pascal.This low pressure selection by winnowing concentration equipment is identical with above-mentioned high pressure selection by winnowing concentration equipment structure, and during implementation step (7), what be blown in the described case is low-pressure air.
The jaw crusher that reaches described in the present embodiment, round shake sieve, first order ribbon conveyer, dry type highfield magnetic separator, dry ball, grader, oscillating flat sieve, dry type cleaning magnetic separator, second level ribbon conveyer and third level ribbon conveyer, its structure and operation principle are those skilled in the art's common practise, do not repeat them here.
Extract the method for fine iron breeze under the anhydrous condition of the present invention in pre-selection stage, driven cylinder by first order ribbon conveyer discharge end is that the highfield magnetic separation roller carries out one-level magnetic separation preliminary election to the raw ore ore particle, removed the part mine tailing, improved production efficiency, the highfield magnetic separator carries out the concentrate grade of the half concentrate grain that obtains after the secondary magnetic separation preliminary election and brings up to more than 30%; After the half fine ore classification that obtains behind the half concentrate grain ball milling, fineness 〉=100 purposes, half fine ore is transported to high pressure selection by winnowing concentration equipment, because the high-pressure blast air inlet is obliquely installed from bottom to top on the antetheca of case, when carrying out the magnetic separation of high pressure selection by winnowing, in case, tilt to be blown into high-pressure blast by the high-pressure blast air inlet from bottom to top, half fine ore during high-pressure blast will fall blows to the dry type cleaning magnetic separator, wherein the bulky grain mine tailing in half fine ore falls to the bottom of case in the self gravitation effect, fine grained mine tailing lighter in half fine ore is discharged with the wind and is collected from the open top of case, fine iron breeze in half fine ore is then adsorbed by the dry type cleaning magnetic separator, thereby finally extract fine iron breeze, production shows that the concentrate grade of the fine iron breeze that extracts after the magnetic separation of high pressure selection by winnowing is brought up to more than 60%.
After further being provided with low pressure selection by winnowing magnetic separation step, can the fine iron breeze in the fine grained mine tailing of discharging in the high pressure selection by winnowing magnetic separation step and collecting fully be extracted, production shows, from crushing raw ore to finally extracting fine iron breeze by the magnetic separation of high pressure selection by winnowing and the magnetic separation of low pressure selection by winnowing, the concentrate grade of fine iron breeze is brought up to more than 65%.
Extract the method for fine iron breeze under the anhydrous condition of the present invention, broken away from the dependence to water resource, thoroughly removed the link of water, avoided the waste of water resource, reduced the water pollution to surrounding environment.The iron ore that especially can satisfy the arid areas such as desert can extract fine iron breeze in the minery without the water source, has reduced cost of transportation and extraction cost, is conducive to the exploitation of the arid area iron ores such as desert.
The above only is giving an example of preferred embodiments of the present invention, and the part of wherein not addressing in detail is those of ordinary skills' common practise.Protection scope of the present invention is as the criterion with the content of claim, and any equivalent transformation that carries out based on technology enlightenment of the present invention is also within protection scope of the present invention.
Claims (9)
1. extract the method for fine iron breeze under the anhydrous condition, it is characterized in that, may further comprise the steps:
(1) fragmentation: with disintegrating machine raw ore is carried out fragmentation, get the raw ore ore particle;
(2) screening: the raw ore ore particle is sieved with vibratory sieve;
(3) preliminary election: screening obtains≤and the raw ore ore particle of 5mm drops down onto first order ribbon conveyer, the driven cylinder that is positioned at described first order ribbon conveyer discharge end is the highfield magnetic separation roller, described highfield magnetic separation roller carries out sending into dry type highfield magnetic separator after the one-level magnetic separation preliminary election to the raw ore ore particle on the described first order ribbon conveyer and carries out the secondary magnetic separation preliminary election, gets half concentrate grain;
(4) ball milling: the half concentrate grain that step (3) is made is sent into dry ball and is carried out ball milling, gets half fine ore;
(5) classification: half fine ore that step (4) is made carries out classification;
(6) high pressure selection by winnowing magnetic separation: the fineness after step (5) classification 〉=100 purposes, half fine ore is delivered to high pressure selection by winnowing concentration equipment, and described high pressure selection by winnowing concentration equipment comprises
The dry type cleaning magnetic separator, described dry type cleaning magnetic separator is provided with case outward, offer material inlet on the antetheca of described case, below corresponding to described material inlet on the antetheca of described case offers the high-pressure blast air inlet, described high-pressure blast air inlet is obliquely installed from bottom to top on the antetheca of described case, is provided with open top on the roof of described case;
In described case, tilt to be blown into high-pressure blast by described high-pressure blast air inlet from bottom to top, half fine ore during described high-pressure blast will fall blows to described dry type cleaning magnetic separator, bulky grain mine tailing in described half fine ore falls to described case bottom in the self gravitation effect, fine grained mine tailing in described half fine ore is discharged with the wind from the open top of described case, fine iron breeze in described half fine ore is adsorbed by described dry type cleaning magnetic separator, thereby finally extracts fine iron breeze.
2. extract the method for fine iron breeze under the anhydrous condition as claimed in claim 1, it is characterized in that: in the described step (3), the magnetic induction intensity of described highfield magnetic separation roller is 3000-4000 Gauss; The magnetic induction intensity of described highfield magnetic separator is 3000-4000 Gauss.
3. extract the method for fine iron breeze under the anhydrous condition as claimed in claim 1, it is characterized in that: in the described step (6), the magnetic induction intensity of described dry type cleaning magnetic separator is 2500-3000 Gauss; The blast of described high-pressure blast is 2500-3000 Pascal.
4. extract the method for fine iron breeze under the anhydrous condition as claimed in claim 1, it is characterized in that: in the described step (2), after the screening＞the raw ore ore particle of 5mm returns to step (1), after the fragmentation more successively implementation step (2) to step (6).
5. extract the method for fine iron breeze under the anhydrous condition as claimed in claim 1, it is characterized in that: in the described step (5), after the classification＜100 purposes, half fine ore returns to step (4), behind the ball milling more successively implementation step (5) to step (6).
6. extract the method for fine iron breeze under the anhydrous condition as claimed in claim 1, it is characterized in that: described disintegrating machine adopts jaw crusher.
7. extract the method for fine iron breeze under the anhydrous condition as claimed in claim 1, it is characterized in that: described vibratory sieve adopts the round sieve that shakes.
8. as extracting the method for fine iron breeze under each described anhydrous condition of claim 1 to 7, it is characterized in that, also comprise: step (7), low pressure selection by winnowing magnetic separation step, with low pressure selection by winnowing concentration equipment the fine iron breeze in the fine grained mine tailing of discharging in the described step (6) is extracted, described low pressure selection by winnowing concentration equipment is identical with described high pressure selection by winnowing concentration equipment structure, during implementation step (7), is blown into low-pressure air in described case.
9. extract the method for fine iron breeze under the anhydrous condition as claimed in claim 8, it is characterized in that: the blast of described low-pressure air is 1000-2000 Pascal.
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| CN104437840A (en) * | 2014-11-04 | 2015-03-25 | 无锡阳工机械制造有限公司 | Method for obtaining finished product of iron from iron ores |
| CN104437855A (en) * | 2014-11-04 | 2015-03-25 | 无锡市百顺机械厂 | Method for extracting finished iron from iron ore |
| CN104437854A (en) * | 2014-11-04 | 2015-03-25 | 无锡市百顺机械厂 | Method for obtaining and transporting finished iron from iron ores |
| CN104437856A (en) * | 2014-11-04 | 2015-03-25 | 无锡市百顺机械厂 | Method for extracting finished product iron from iron ores |
| CN104475248A (en) * | 2014-11-04 | 2015-04-01 | 无锡市百顺机械厂 | Method for obtaining finished product iron from iron ore |
| CN104368435A (en) * | 2014-11-04 | 2015-02-25 | 无锡阳工机械制造有限公司 | Method for acquiring finished product iron from iron ore |
| CN104475241A (en) * | 2014-11-04 | 2015-04-01 | 无锡阳工机械制造有限公司 | Method for extracting finished product iron from iron ore |
| CN104475247A (en) * | 2014-11-04 | 2015-04-01 | 无锡阳工机械制造有限公司 | Method for extracting and transporting finished product iron from iron ore |
| CN104525369A (en) * | 2014-11-04 | 2015-04-22 | 无锡市百顺机械厂 | Method for extracting finished iron from iron ore |
| CN104368436A (en) * | 2014-11-04 | 2015-02-25 | 无锡市百顺机械厂 | Method for screening ferrous products out from iron ores |
| WO2017005190A1 (en) * | 2015-07-07 | 2017-01-12 | 陈勇 | Magnetite separation apparatus by means of ultrahigh magnetic field |
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| CN107262276A (en) * | 2017-07-11 | 2017-10-20 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of hermetically sealed dry type of fine fraction magnetic iron ore throws useless technique |
| CN107335537A (en) * | 2017-07-11 | 2017-11-10 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of hermetically sealed dry type of fine fraction roasting iron ore throws useless technique |
| CN107626711A (en) * | 2017-08-25 | 2018-01-26 | 鞍钢股份有限公司 | A kind of recycling processing method of dedusting ash containing potassium |
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