CN100577308C - Belt-type double-magnetic track magnetic separator for obtianing fine iron powder by magnetic separation - Google Patents
Belt-type double-magnetic track magnetic separator for obtianing fine iron powder by magnetic separation Download PDFInfo
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- CN100577308C CN100577308C CN200710163393A CN200710163393A CN100577308C CN 100577308 C CN100577308 C CN 100577308C CN 200710163393 A CN200710163393 A CN 200710163393A CN 200710163393 A CN200710163393 A CN 200710163393A CN 100577308 C CN100577308 C CN 100577308C
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- permanent magnetism
- belt conveyor
- slag
- ironware
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Abstract
The present invention relates to a method to extract refined iron powder from steel slag. The method comprises the steel slag pretreatment, the pneumatic pre-selection of iron substances and removal of non-iron substances, the magnetic selection and separation, and other steps to get the iron powder with the iron content above 40 weight percent, and the fine steel slag powder with the iron content below 1 weight percent. The method is simple and convenient, fully presents the characteristic of the circular economy, realizes the full use of natural resources and is provided with the good economic benefits.
Description
[technical field]
The present invention relates to a kind of steel-making waste residue treatment technology, more specifically, the present invention relates to from slag, extract the method for smart iron powder.
[background technology]
Along with World Economics and China's rapid economy development, the comsumption of natural resources is serious day by day, and therefore a problem important and that can not avoid is how to keep sustained economic development to pendulum in the people front, so recycling economy is also just arisen at the historic moment.At present, recycling economy has become an extremely important approach of sustained economic development.In recycling economy, the most important thing is turns waste into wealth the refuse that it is believed that, realizes the utilization again of resource.For example, the slag that discharges of will having made steel is used as production cement, concrete raw material, because this good product performance reduces production costs, so be well received.
Application number 200410023668.4, denomination of invention " the slag environmental protection utilizes new technology " disclose a kind of method, it comprises slag is placed on carries out fragmentation in the multiple stage crushing system, carrying out the magnetic separation screening then handles, carry out grinding after the tailings oven dry after the deironing, again through the deironing of magnetic separation system, select powder, select fine " flour " abrasive and be the slag micro powder product.Application number 200610044388.0, denomination of invention " production technology of steel slag iron fine powder " disclose a kind of method, this method comprises slag oven dry, premagnetization, homogenizing, storage, carry out the pre-grinding of dry type again, separate, 3 millimeters following steel-making slag powder adopt powder concentrator to carry out the winnowing powder, and the above particle of 180 orders carries out ferromagnetic choosing, takes off magnetic, below ball milling to 180 order, with powder concentrator steel slag iron fine powder is separated with slag micro powder then again.These files have been described steel slag iron fine powder and slag micro powder preparation method, and still, these methods can't fully satisfy actual demand.The slag micro powder specific area that obtains has reached 450m
2/ Kg, because of micro powder granule surface can and the invar slag stand repeatedly magnetic separation and handle and make namagnetic substance have magnetic, therefore utilize common magnetic plant can't extract iron compound in the slag micro powder, the meeting of application produces adverse influence and these iron compounds are to its slag micro powder product, but also wasted resource, for this reason, the inventor is through a large amount of tests, finally make the present invention, solved the problems referred to above.
[summary of the invention]
[technical problem that will solve]
The objective of the invention is to propose a kind of method of from slag, extracting smart iron powder.
[technical scheme]
The present invention finishes by following technical proposals:
A kind of method of extracting smart iron powder from slag is characterized in that this method comprises the steps:
A, slag preliminary treatment: the slag below iron-holder 5 weight % oven dry is less than or equal to 1.5 weight % until reaching water content, again grinding to granularity less than 3mm;
Unless B, wind-force preliminary election iron substance: allow step A) the grinding slag under blast 0.3-0.8kpa with 6000-8000m
3Non-iron substance is removed in the preliminary election of/h air quantity, obtains iron content and reaches the above 0.1-3mm slag micro powder of 55 weight %;
C, the selected separation of iron of magnetic force: the slag micro powder that step B) obtains adopts belt double track magnetic separator magnetic separation 0.1-5 second under magnetic field intensity 2600-3000 Gauss, and separation obtaining smart iron powder like this.
Described slag drying plant is that Jiangsu flies the dryer that roc company produces.Described slag was dried 20-25 minute down at temperature 800-1000 ℃ in this drying plant, was less than or equal to 1.5 weight % up to reaching its water content.
Described slag milling equipment is 3M * 13M general milling machine, will remove greater than the screening of the slag of 3mm, and return its slag milling equipment and carry out grinding again, and the slag that meets granularity requirements is sent to and carried out the wind-force preliminary election.
The equipment that the wind-force preliminary election is used is the powder concentrator that the grinding line is equipped with.
Preferably, steps A) the grinding slag under blast 0.5kpa with 7000-8000m
3Non-iron substance is removed in the preliminary election of/n air quantity.
In the present invention, iron content is to adopt the water method of substitution to measure.
Implement when of the present invention, use the belt double track magnetic separator of inventor's development, this belt double track magnetic separator by frame 1, reductor 2, motor 3, feed hopper 4, permanent magnetism ironware 5,5 ', belt conveyor roller 6A, 6B, 6C, 6D, discharge bucket 7, storage slag basin 8,8 ', drive 9,9 ', 12,12 ', belt 11,11 ' form with product stock vessel 10; Motor 3 energising backs drive reductor 2 and rotate, again through belt 11,11 ', drive 9,9 ', 12, four groups of belt conveyor roller 6A of 12 ' drive, 6B, 6C, 6D rotates in the same way, when described slag micro powder is added in the feed hopper 4, belt conveyor roller 6A downstream is rotated, slag micro powder is delivered to permanent magnetism ironware 5 belows, iron compound is picked up by permanent magnetism ironware 5, and be fed forward by belt conveyor roller 6B, namagnetic substance falls into storage slag basin 8 naturally, and iron compound falls on the belt conveyor roller 6C after leaving permanent magnetism ironware 5, move on and deliver to permanent magnetism ironware 5 ' below, iron compound is by permanent magnetism ironware 5 ' pick up, and be fed forward by belt conveyor roller 6D, fall into product stock vessel 10 naturally through discharge bucket 7, namagnetic substance fall into naturally storage slag basin 8 '.
In the present invention, the magnetic field intensity of described permanent magnetism ironware (5,5 ') is same to each other or different to each other.
In addition, two described permanent magnetism ironwares 5,5 ' can be the identical or different electromagnet of magnetic field intensity.Preferably, two permanent magnetism ironwares 5,5 ' can be the identical electromagnet of magnetic field intensity.
If two permanent magnetism ironwares 5,5 ' magnetic field intensity not simultaneously, then the magnetic field intensity of permanent magnetism ironware 5 than permanent magnetism ironware 5 ' big, the difference of two magnetic field intensities generally is more than 500 Gausses, preferably more than 1000 Gausses.
Described permanent magnetism ironware 5,5 ' shape be rectangle, square, trapezoidal.Preferably described permanent magnetism ironware 5,5 ' shape be rectangle.
Described drive 9,9 ', 12,12 ' be gear or friction pulley.Preferably described drive 9,9 ', 12,12 ' be gear.
The iron content of the smart iron powder that employing the inventive method obtains is more than the 40 weight %, and preferably, the iron content of described smart iron powder reaches more than the 50 weight %.
The iron content of the slag micro powder that employing the inventive method obtains is below the 1 weight %.
[beneficial effect]
The present invention has following good effect:
1, employing the present invention can obtain the smart iron powder of high Fe content simultaneously, reaches the following slag micro powder of iron content 1 weight % of correlated quality standard code, and properties of product are stable.
2, this magnetic separation system bulk is little, can be directly installed in the slag micro powder production line, ten thousand yuan of gross investment 4-6, power consumption 3KW per hour, per hour can extract smart iron powder 640Kg, calculate according to producing 300000 tons of slag micro powder production lines per year, the smart iron powder of annual extraction produces 7,200,000 yuan of economic benefits, and is therefore considerable.
3, demonstrate fully the characteristic of recycling economy, the realization natural resources makes full use of, calculate according to producing 300000 tons of slag micro powder production lines per year, the annual smart iron powder that reclaims is equivalent to reduce 20,000 tons of iron ores of use, this not only is equivalent to increase resource, but also reduce environment damage, have crucial social effect.
[description of drawings]
Fig. 1 is a belt double track magnetic separator schematic diagram.
Wherein: frame 1; Reductor 2; Motor 3; Feed hopper 4; Permanent magnetism ironware 5,5 '; Belt conveyor roller 6A, 6B, 6C, 6D; Discharge bucket 7; Storage slag basin 8,8 '; Drive 9,9 ', 12,12 '; Product stock vessel 10; Belt 11,11 '.
[specific embodiment]
Embodiment 1
Prepare smart iron powder according to following step process slag
Slag preliminary treatment: use Jiangsu to fly in the drying plant that roc company sells the slag of iron-holder 4.9 weight % to be lower than 1.5 weight % up to reaching water content in the oven dry 25 minutes down of 800 ℃ of temperature.Re-use Jiangsu and fly the slag milling equipment that roc company sells, after connect screen cloth, will remove greater than the slag screening of 3mm, and return its foregoing slag milling equipment and carry out grinding again, granularity is sent to less than the slag of 3mm is carried out the wind-force preliminary election.
Unless wind-force preliminary election iron substance: allow the grinding slag under blast 0.5kpa with 6000m
3Non-iron substance is removed in the preliminary election of/h air quantity, obtains the 0.1-3mm slag micro powder that iron content reaches 55 weight %.
The selected separation of iron of magnetic force: when being added to the slag micro powder that obtains on the belt double track magnetic separator feed hopper 4 of the present invention, belt conveyor roller 6A downstream is rotated, slag micro powder is delivered to rectangle permanent magnetism ironware 5 belows, magnetic field intensity 2600 Gausses of this permanent magnetism ironware, by 1 second time, iron compound is picked up by this permanent magnetism ironware 5, and be fed forward by belt conveyor roller 6B, namagnetic substance falls into storage slag basin 8 naturally, and iron compound falls on the belt conveyor roller 6C after leaving permanent magnetism ironware 5, remaining slag micro powder moves on and delivers to rectangle permanent magnetism ironware 5 ' below, magnetic field intensity 2600 Gausses of this permanent magnetism ironware, by 1 second time, iron compound is by permanent magnetism ironware 5 ' pick up, and is fed forward by belt conveyor roller 6D, falls into product stock vessel 10 naturally through discharge bucket 7, namagnetic substance fall into naturally storage slag basin 8 ', obtain smart iron powder and slag micro powder like this.Adopt the water method of substitution to measure, it is 80.5% and 0.9% that its smart iron powder and slag micro powder contain iron respectively.
Embodiment 2
Prepare smart iron powder according to following step process slag
Slag preliminary treatment: use Jiangsu to fly in the drying plant that roc company sells the slag of iron-holder 4.6 weight % to be lower than 1.5 weight % up to reaching water content in the oven dry 20 minutes down of 1000 ℃ of temperature.Re-use Jiangsu and fly the ball mill that roc company produces and make the slag milling equipment, after connect screen cloth, will remove greater than the slag screening of 3mm, and return its foregoing slag milling equipment and carry out grinding again, granularity is sent to less than the slag of 3mm is carried out the wind-force preliminary election.
Unless wind-force preliminary election iron substance: allow the grinding slag under blast 05kpa with 7000m
3Non-iron substance is removed in the preliminary election of/h air quantity, obtains the 0.1-3mm slag micro powder that iron content reaches 58 weight %.
The selected separation of iron of magnetic force: when being added to the slag micro powder that obtains on the belt double track magnetic separator feed hopper 4 of the present invention, belt conveyor roller 6A downstream is rotated, slag micro powder is delivered to rectangle permanent magnetism ironware 5 belows, magnetic field intensity 2800 Gausses of this permanent magnetism ironware, by 1.2 seconds time, iron compound is picked up by this permanent magnetism ironware 5, and be fed forward by belt conveyor roller 6B, namagnetic substance falls into storage slag basin 8 naturally, and iron compound falls on the belt conveyor roller 6C after leaving permanent magnetism ironware 5, remaining slag micro powder moves on and delivers to rectangle permanent magnetism ironware 5 ' below, magnetic field intensity 2600 Gausses of this permanent magnetism ironware, by 1 second time, iron compound is by permanent magnetism ironware 5 ' pick up, and is fed forward by belt conveyor roller 6D, falls into product stock vessel 10 naturally through discharge bucket 7, namagnetic substance fall into naturally storage slag basin 8 ', obtain smart iron powder and slag micro powder like this.Adopt the water method of substitution to measure, it is 80.8% and 0.9% that its smart iron powder and slag micro powder contain iron respectively.
Embodiment 3
Prepare smart iron powder according to following step process slag
Slag preliminary treatment: use Jiangsu to fly in the drying plant that roc company sells the slag of iron-holder 4.6 weight % to be lower than 1.5 weight % up to reaching water content in the oven dry 25 minutes down of 900 ℃ of temperature.Re-use Jiangsu and fly the slag milling equipment that roc company sells, after connect screen cloth, will remove greater than the slag screening of 3mm, and return its foregoing slag milling equipment and carry out grinding again, granularity is sent to less than the slag of 3mm is carried out the wind-force preliminary election.
Unless wind-force preliminary election iron substance: allow the grinding slag under blast 0.5kpa with 8000m
3Non-iron substance is removed in the preliminary election of/h air quantity, obtains the 0.1-3mm slag micro powder that iron content reaches 55 weight %.
The selected separation of iron of magnetic force: when being added to the slag micro powder that obtains on the belt double track magnetic separator feed hopper 4 of the present invention, belt conveyor roller 6A downstream is rotated, slag micro powder is delivered to rectangle permanent magnetism ironware 5 belows, magnetic field intensity 3000 Gausses of this permanent magnetism ironware, by 1 second time, iron compound is picked up by this permanent magnetism ironware 5, and be fed forward by belt conveyor roller 6B, namagnetic substance falls into storage slag basin 8 naturally, and iron compound falls on the belt conveyor roller 6C after leaving permanent magnetism ironware 5, remaining slag micro powder moves on and delivers to rectangle permanent magnetism ironware 5 ' below, magnetic field intensity 2600 Gausses of this permanent magnetism ironware, by 1 second time, iron compound is by permanent magnetism ironware 5 ' pick up, and is fed forward by belt conveyor roller 6D, falls into product stock vessel 10 naturally through discharge bucket 7, namagnetic substance fall into naturally storage slag basin 8 ', obtain smart iron powder and slag micro powder like this.Adopt methods analyst, it is 80.5% and 0.9% that its smart iron powder and slag micro powder contain iron respectively.
Claims (6)
1, a kind ofly be used for magnetic separation and separate the belt double track magnetic separator obtain smart iron powder, it is characterized in that it is by frame (1), reductor (2), motor (3), feed hopper (4), the first permanent magnetism ironware (5), the second permanent magnetism ironware (5 '), first group of belt conveyor roller (6A), second group of belt conveyor roller (6B), the 3rd group of belt conveyor roller (6C), the 4th group of belt conveyor roller (6D), discharge bucket (7), the first storage slag basin (8), the second storage slag basin (8 '), drive (9,9 ', 12,12 '), belt (11,11 ') form with product stock vessel (10), wherein the first permanent magnetism ironware (5) is 2600-3000 Gauss with the magnetic field intensity of the second permanent magnetism ironware (5 '); Motor (3) energising back drives reductor (2) and rotates, again through belt (11,11 '), drive (9,9 ', 12,12 ') four groups of belt conveyor roller (6A of drive, 6B, 6C, 6D) rotate in the same way, when being added to slag micro powder in the feed hopper (4), first group of belt conveyor roller (6A) downstream is rotated, slag micro powder is delivered to the first permanent magnetism ironware (5) below, iron compound is picked up by the first permanent magnetism ironware (5), and be fed forward by second group of belt conveyor roller (6B), namagnetic substance falls into the first storage slag basin (8) naturally, and iron compound falls on the 3rd group of belt conveyor roller (6C) after leaving the first permanent magnetism ironware (5), move on and deliver to the second permanent magnetism ironware (5 ') below, iron compound is picked up by the second permanent magnetism ironware (5 '), and be fed forward by the 4th group of belt conveyor roller (6D), naturally fall into product stock vessel (10) through discharge bucket (7), namagnetic substance falls into the second storage slag basin (8 ') naturally.
2, magnetic separator according to claim 1 is characterized in that the magnetic field intensity of the described first permanent magnetism ironware (5), the second permanent magnetism ironware (5 ') is same to each other or different to each other.
3, magnetic separator according to claim 1 is characterized in that the described first permanent magnetism ironware (5), the second permanent magnetism ironware (5 ') are the identical or different electromagnets of magnetic field intensity.
4, magnetic separator according to claim 1 is characterized in that the shape of the described first permanent magnetism ironware (5), the second permanent magnetism ironware (5 ') is a rectangle, square or trapezoidal.
5, magnetic separator according to claim 1 is characterized in that described drive (9,9 ', 12,12 ') is gear or friction pulley.
6, magnetic separator according to claim 5 is characterized in that described drive (9,9 ', 12,12 ') is a gear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710163393A CN100577308C (en) | 2007-10-24 | 2007-10-24 | Belt-type double-magnetic track magnetic separator for obtianing fine iron powder by magnetic separation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710163393A CN100577308C (en) | 2007-10-24 | 2007-10-24 | Belt-type double-magnetic track magnetic separator for obtianing fine iron powder by magnetic separation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101138762A CN101138762A (en) | 2008-03-12 |
| CN100577308C true CN100577308C (en) | 2010-01-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200710163393A Expired - Fee Related CN100577308C (en) | 2007-10-24 | 2007-10-24 | Belt-type double-magnetic track magnetic separator for obtianing fine iron powder by magnetic separation |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102397817B (en) * | 2011-11-09 | 2014-05-07 | 山西太钢不锈钢股份有限公司 | Method for sorting stainless steel slag |
| CN103357499A (en) * | 2013-07-01 | 2013-10-23 | 陕西三沅重工发展股份有限公司 | Belt-type multi-stage multi-gradient magnetic separator and method for mineral separation by using belt-type multi-stage multi-gradient magnetic separator |
| CN105855041B (en) * | 2016-06-08 | 2018-04-10 | 镇江电磁设备厂有限责任公司 | A kind of continuous output device of magnetic material for constant magnetic deironing device |
| CN107604169B (en) * | 2017-08-25 | 2019-01-08 | 鞍钢股份有限公司 | Method for recycling lead-containing dedusting ash |
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- 2007-10-24 CN CN200710163393A patent/CN100577308C/en not_active Expired - Fee Related
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| CN101138762A (en) | 2008-03-12 |
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Granted publication date: 20100106 Termination date: 20191024 |