CN1565747A - Technique for separating iron from blast furnace gas mire and specified magnetic separator - Google Patents
Technique for separating iron from blast furnace gas mire and specified magnetic separator Download PDFInfo
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- CN1565747A CN1565747A CN 03143156 CN03143156A CN1565747A CN 1565747 A CN1565747 A CN 1565747A CN 03143156 CN03143156 CN 03143156 CN 03143156 A CN03143156 A CN 03143156A CN 1565747 A CN1565747 A CN 1565747A
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Abstract
The invention relates to a process for separating iron from the blast furnace gas mud and its special magnetic separator for improving the content of mineral powder total iron and reducing the content of magnetic iron. The process includes the following features: magnetic induction density of the magnetic block of the magnetic separator is from 3800 to 4500Oe, magnetic declination angle is between 3 and 5 degrees, magnetic separator stirring water pressure is from 4 to 5Kg/cm#+[2], flushing water pressure is from 4 to 6Kg/cm#+[2], and compressed air stirring tube pressure is from 4 to 5Kg/cm#+[2]. The separator consists of a motor, a magnetic block roll drum and a materials tank, wherein the detachable magnetic block roll drum is connected with a motor output shaft, the materials tank is arranged on the underside of the separator, a magnetic block button is mounted on one end of the magnetic block roll drum, and a stirring tube is arranged on the wall of the materials tank. The magnetic separation process comprises the steps : concentrated slurry is put into the materials tank of the magnetic separator, strong magnetic mineral particles are adsorbed on the surface of the roll drum and flushed into concentrate hopper by washing water, and micro magnetic and non-magnetic minerals are removed.
Description
Affiliated technical field: the present invention relates to a kind of technology and special-purpose magnetic separator thereof that from blast furnace gas mud, selects iron.
Background technology: at present, the blast furnace gas mud iron selection technique is generally the solid dust of discharging with blast furnace gas in the 1. blast furnace ironmaking process, removes 50-60% coarse fraction stove dirt through gravitational precipitator; 2. remain fine fraction stove dirt and form mud with recirculated water through a civilian scrubbing tower; 3. mud flows into sedimentation basin after dosing between dosing is handled; 4. carry out concentration adjustment through concentration basin, the concentration after the adjusting is 40-50%. 5. the mud after concentrating enters the magnetic separator magnetic separation; 6. the Iron Ore Powder after the magnetic separation is through breeze pond precipitation, bleed, air-dry.The breeze all iron content that this method is selected from blast furnace gas mud is low, and Armco magnetic iron race tail quality percentage composition height, utilizes through the sintering process batch mixing again, influences the blast furnace feeding grade.
Summary of the invention: the purpose of this invention is to provide a kind of blast furnace gas mud iron selection technique and special-purpose magnetic separator thereof, can improve the breeze all iron content, reduce Armco magnetic iron and run tail quality percentage composition, solve the problems referred to above that background technology exists.
Technical scheme of the present invention is:
It is the 3800-4500 oersted that the magnetic separator magnetic patch stays table magnetic induction intensity, and magnetic declination is the 3-5 degree, and it is 4-5Kg/cm that magnetic separator stirs water pressure
2, flushing water pressure is 4-6Kg/cm
2, compressed air stirring pipe pressure is 4-5Kg/cm
2
Blast furnace gas mud selects the iron magnetic separator, is made up of motor, magnetic patch cylinder, hopper, and magnetic patch cylinder and motor output shaft flexibly connect, and downside is provided with hopper, and magnetic patch cylinder one end is provided with magnetic patch and turns round, and trough sidewalls is provided with stirring pipe.
Mud after concentrating enters the magnetic separator hopper, and when field regions, wherein the ore particle that magnetic is stronger is under the effect of magnetic field force at magnetic, be attracted on the magnetic patch cylinder surface, in the magnetic patch roller rotating process, the magnetic ore particle rotates with cylinder, taken out of field regions, poured in the concentrate hopper with flushing water.Weak magnetic and non magnetic ore are got rid of, and under the effect of flow of slurry, discharge from tail-box in groove, thereby finish the magnetic separation process.
The present invention has simple in structure and can improve the breeze all iron content, reduces the characteristics that Armco magnetic iron runs tail quality percentage composition.
Description of drawings:
Accompanying drawing 1 is process chart of the present invention
Accompanying drawing 2 blast furnace gas muds select iron magnetic separator structural representation.
Among Fig. 1: between a civilian scrubbing tower 1, distribution well 2, sedimentation basin 3,7, concentration basin 4, magnetic separator 5, breeze pond 6, disc vacuum filter 8, heat, cold water well 9, cooling tower 10, dosing 11.
Among Fig. 2: motor 21, magnetic patch cylinder 22, hopper 23, magnetic patch are turned round (24), stirring pipe (25).
The specific embodiment:, further specify the present invention by embodiment below in conjunction with accompanying drawing.
Among the embodiment, technology of the present invention is:
1. the solid dust of discharging with blast furnace gas in the blast furnace ironmaking process is removed 50-60% coarse fraction stove dirt through gravitational precipitator;
2. remain fine fraction stove dirt and get back to 24 meters distribution wells of φ, 2 formation mud through a civilian scrubbing tower 1;
3. mud is after 11 dosings between dosing are handled, and concentration of hydraulic mixture is 30-40%, flows into 24 meters sedimentation basins 3 of φ:
4. the overflow water in the sedimentation basin 3 flows into two civilian pumping plant hot wells 9, gets back to cold water well 9, cycling and reutilization through cooling tower 10 coolings;
5. the mud in the sedimentation basin 3 carries out concentration adjustment through 12 meters concentration basins of φ 4, and the concentration after the adjusting is 40-50%.；
6. the mud after concentrating enters magnetic separator 5 magnetic separation, and it is 4000 oersteds that the magnetic separator magnetic patch stays table magnetic induction intensity, and magnetic declination is 4 degree, and it is 5Kg/cm that magnetic separator stirs water pressure
2, flushing water pressure is 6Kg/cm
2, compressed air stirring pipe pressure is 5Kg/cm
2Carried out once-through operation in per 1 hour, the time is 2 minutes.
7. tail mud and overflow water enter 24 meters concentration basins 7 of φ in the lump after the magnetic separation, and the mud after concentrating is transported to disc vacuum filter 8 with pump and carries out processed;
8. the Iron Ore Powder after the magnetic separation is through breeze pond (6) precipitation, bleed, air-dry.
The breeze all iron content that breeze all iron content of selecting according to technology of the present invention and background technology are selected, and Armco magnetic iron to run the contrast of tail quality percentage composition as follows:
By relatively we are not difficult to find out that the Iron Ore Powder of selecting contains full iron grade and improved 2.68 percentage points, and Armco magnetic iron race tail amount has reduced 7.19 percentage points.
Blast furnace gas mud selects the iron magnetic separator, is made up of motor 21, magnetic patch cylinder 22, hopper 23, and magnetic patch cylinder 22 flexibly connects with motor 21 output shafts, and downside is provided with hopper 23, and magnetic patch cylinder 22 1 ends are provided with magnetic patch and turn round 24, and trough sidewalls is provided with stirring pipe 25.
Mud after concentrating enters magnetic separator hopper 23, when field regions, wherein the ore particle that magnetic is stronger is under the effect of magnetic field force at magnetic, be attracted on magnetic patch cylinder 22 surfaces, in magnetic patch cylinder 22 rotary courses, the magnetic ore particle is taken out of field regions with 22 rotations of magnetic patch cylinder, pours in the concentrate hopper with flushing water.Weak magnetic and non magnetic ore are got rid of, and under the effect of flow of slurry, discharge from tail-box in groove, thereby finish the magnetic separation process.
Claims (6)
1, a kind of blast furnace gas mud iron selection technique comprises:
1. the solid dust of discharging with blast furnace gas in the blast furnace ironmaking process is removed 50-60% coarse fraction stove dirt through gravitational precipitator;
2. remain fine fraction stove dirt and form mud with recirculated water through a civilian scrubbing tower (1);
3. mud flows into sedimentation basin (3) after (11) dosing between dosing is handled;
4. carry out concentration adjustment through concentration basin (4), the concentration after the adjusting is 40-50%.；
5. the mud after concentrating enters magnetic separator (5) magnetic separation;
6. the Iron Ore Powder after the magnetic separation is through breeze pond (6) precipitation, bleed, air-dry.
It is characterized in that it is the 3800-4500 oersted that the magnetic separator magnetic patch stays table magnetic induction intensity.
2, the blast furnace gas mud iron selection technique according to claim 1 is characterized in that magnetic declination is the 3-5 degree.
3,, it is characterized in that it is 4-5Kg/cm that magnetic separator stirs water pressure according to claim 1 or 2 described blast furnace gas mud iron selection techniques
2, flushing water pressure is 4-6Kg/cm
2, compressed air stirring pipe pressure is 4-5Kg/cm
2
4, the blast furnace gas mud iron selection technique according to claim 3 is characterized in that carrying out once-through operation in per 1 hour, and the time is 1-2 minute.
5, a kind of blast furnace gas mud selects the iron magnetic separator, form by motor (21), magnetic patch cylinder (22), hopper (23), magnetic patch cylinder (22) flexibly connects with motor (21) output shaft, downside is provided with hopper (23), it is characterized in that magnetic patch cylinder (22) one ends are provided with magnetic patch and turn round (24), magnetic patch is turned round (24) and is flexibly connected with magnetic patch cylinder (22).
6, select machine according to the described a kind of dedicated magnetic of claim 5, it is characterized in that hopper (23) wall is provided with stirring pipe (25).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031431569A CN1301806C (en) | 2003-06-17 | 2003-06-17 | Technique for separating iron from blast furnace gas mire and specified magnetic separator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031431569A CN1301806C (en) | 2003-06-17 | 2003-06-17 | Technique for separating iron from blast furnace gas mire and specified magnetic separator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1565747A true CN1565747A (en) | 2005-01-19 |
| CN1301806C CN1301806C (en) | 2007-02-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031431569A Expired - Fee Related CN1301806C (en) | 2003-06-17 | 2003-06-17 | Technique for separating iron from blast furnace gas mire and specified magnetic separator |
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| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012062131A1 (en) * | 2010-11-12 | 2012-05-18 | 山东乾舜矿冶科技股份有限公司 | Method of recovering and exploiting blast furnace dust from iron-smelting |
| CN106794469A (en) * | 2014-10-01 | 2017-05-31 | 住友重机械精科技株式会社 | Rotary drum-type magnetic separation |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2749380A1 (en) * | 1977-11-04 | 1979-05-10 | Friedrich Erich Metall Huette | Ferruginous fine grained scrap recycling - by comminution screening, jigging, thickening and magnetic separation before briquetting |
| GB1600022A (en) * | 1978-05-30 | 1981-10-14 | Univ Cardiff | Recovery of heavy metals from flue dusts |
| CN1063429A (en) * | 1991-12-12 | 1992-08-12 | 鞍山钢铁公司 | Gas mud, mixture of fly ash comprehensive recovery system |
| CN1093682A (en) * | 1993-04-15 | 1994-10-19 | 包钢华津新技术开发公司 | Produce the method for magnetic with fume containing iron from steel smelting |
| JP2000301128A (en) * | 1999-04-15 | 2000-10-31 | Ebara Corp | Method and apparatus for recycling incineration ash of fluidized bed incinerator and incombustible material residue at bottom of gasification furnace of gasifying/ melting furnace |
| CN100333836C (en) * | 2001-06-01 | 2007-08-29 | 上海梅山(集团)有限公司 | Method for recovering iron ore concentrate from gas mud |
-
2003
- 2003-06-17 CN CNB031431569A patent/CN1301806C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012062131A1 (en) * | 2010-11-12 | 2012-05-18 | 山东乾舜矿冶科技股份有限公司 | Method of recovering and exploiting blast furnace dust from iron-smelting |
| CN106794469A (en) * | 2014-10-01 | 2017-05-31 | 住友重机械精科技株式会社 | Rotary drum-type magnetic separation |
| CN106794469B (en) * | 2014-10-01 | 2024-02-23 | 住友重机械精科技株式会社 | Rotary drum type magnetic separation device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1301806C (en) | 2007-02-28 |
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Granted publication date: 20070228 |