CN1093682A - Produce the method for magnetic with fume containing iron from steel smelting - Google Patents
Produce the method for magnetic with fume containing iron from steel smelting Download PDFInfo
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- CN1093682A CN1093682A CN 93104466 CN93104466A CN1093682A CN 1093682 A CN1093682 A CN 1093682A CN 93104466 CN93104466 CN 93104466 CN 93104466 A CN93104466 A CN 93104466A CN 1093682 A CN1093682 A CN 1093682A
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Abstract
The present invention relates to a kind of production method of magnetic, be characterized in the fume containing iron from steel smelting being raw material, add water and size mixing, hydroclone classification, the thin ore pulp that overflows from overflow port is through precipitation, be drying to obtain red particle.If its precipitation high-temperature roasting is promptly got red iron oxide.The rough slurry of discharging from spigot, through the belt chute ore dressing, crude mineral roasting, dry type magnetic separation and black particle.Advantage of the present invention is that technology is simple, less energy consumption, and production cost is low, can obtain than remarkable economical, environment and social benefit.
Description
The present invention relates to a kind of production method of magnetic, be particularly suitable for the method that fume containing iron from steel smelting is raw material production red particle and black particle, belong to the production technical field of magneticsubstance.
The method of producing magnetic in the prior art is that the cleaning of steel rolling iron phosphorus, magnetic separation, pulverizing, grinding, roasting reduction are ground, sieve and make black particle; Or steel rolling iron phosphorus and acid solution reacted, chemical method is produced black particle.Red particle is to be made through low-temperature oxidation by black particle.This traditional production method, complex manufacturing not only, long flow path, and also energy consumption is big, the cost height, and environmental pollution is serious.
It is the method (number of patent application is 86103643A and 86106586A) of raw material production black magnetic oxide that Tianjin in 1986 builds that new chemical plant and Yang Wenlin reported with the chimney for steel making ash, be to be raw material directly, through washing, magnetic separation, filtration, addition reaction, filtration, wash, dehydrate and make black magnetic oxide with the chimney for steel making ash.This method synthesis has utilized the chimney for steel making ash, turns waste into wealth, and turns harm into good, and has eliminated environmental pollution.But its technology is still complicated, long flow path, cost height.
The purpose of this invention is to provide a kind of is raw material with the fume containing iron from steel smelting, adopts the method for waterpower gravity treatment and dry type magnetic separation, directly produces red particle and black particle.Simplify technological process, reduce production costs.Eliminate the pollution of fume from steel making simultaneously, carry out comprehensive utilization of resources effectively environment.
The present invention be achieved in that with the open hearth electrostatic precipitation collected close the iron flue dust in the slurrying steel basin, add water and make certain density ore pulp, with mortar pump it is squeezed in the hydrocyclone, given giving under the pressure of ore deposit, ore pulp is done turning motion immediately under the round shape wall restriction of swirler.Because the centrifugal force that hydrocyclone produced is wanted force of gravity big tens times and even hundred times usually, coarse particles is thrown to wall because of centrifugal inertial force is big, and flows downward along wall gradually, and being discharged by cone bottom spigot becomes sand setting.And fine particle is less to the speed that wall moves, and is driven by the mortar towards center flow, is upwards flowed by the center upflow tube, and overflowing from overflow port at last becomes overflow.The thin ore pulp of its overflow is put into a clarifying tank, natural standing sedimentation, abandoning supernatant, throw out promptly gets red particle after the controlled temperature oven dry in the drying and roasting cellar for storing things.Throw out high-temperature roasting in the drying and roasting cellar for storing things promptly gets red iron oxide.
The coarse particles sand setting slurry of discharging from the hydrocyclone spigot flows in the storage ore deposit steel basin, behind the modulation pulp density, squeeze into belt chute with mortar pump, regulate the travelling speed of the belt chute zone face gradient and belt, determine suitable feed ore concentration and mineral slurry flux, under certain washing water yield and hydraulic pressure, carry out gravity concentration.Sorting operation carries out on zone face, and ore pulp is divided equally plate from the first run to the ore deposit and fed equably on the belt, and under the inclined-plane flow action, light ore particle down moves with current, discharges as mine tailing from the belt below.The belt movement direction is opposite with water (flow) direction, be deposited on heavy mineral aggregate on the strap surface by on the belt band, flushing through washing water, the impurity of sneaking into light ore particle such as wherein silicon, calcium is washed, collect required iron content crude mineral at last, drying, roasting get roasting material, and cooling, grinding are after dry type magnetic separation promptly gets black particle.
Advantage of the present invention is to compare with general traditional method, does not need to carry out complicated chemical reaction process, and technical process is short, and equipment is simple, less energy consumption, and production cost is low, and quality product is excellent.Fully utilize simultaneously fume containing iron from steel smelting effectively.Turn waste into wealth, turn harm into good, promote the well-being of mankind.
The invention will be further described below in conjunction with accompanying drawing.
Description of drawings: technological process block-diagram
The fume containing iron from steel smelting Weighing dropped into fills in the pulping tank with agitator of water for industrial use, and the limit edged stirs, compound concentration be 3～8%(by weight) ore pulp, use mortar pump Squeezing into diameter is φ 75～125m/m, taper angle is in 7 °～20 ° the hydrocyclone, be under the condition of 0.15～0.25MPa at feed force, the particle that overflows from the cyclone overfall is less than the thin ore pulp of 20 μ m, flow into standing sedimentation in the stillpot, abandoning supernatant, taking precipitate places the drying and roasting cellar for storing things, the control temperature was 350～400 ℃ of lower insulations 1～2 hour, and dried material is red particle. If taking precipitate places in the drying and roasting cellar for storing things, the control temperature was 500～800 ℃ of lower insulations 2～3 hours, and roasting material is iron oxide red.
The granularity of discharging from the hydrocyclone sand mouth is in the rough slurry inflow one storage ore deposit tank diameter of 20～75 μ m, modulation concentration is 25～35% ore pulp, squeeze into a belt chute with mortar pump and carry out the waterpower gravity separation, regulating the zone face gradient is 13～17 °, the belt speed of service is 1.8m/min, mineral slurry flux is 3.0～3.5L/min, and the washing water yield is 7～10m3/ platform .d, hydraulic pressure are 0.05MPa. Discard CHARACTERISTICS OF TAILINGS SAND, the iron content crude mineral of gained places in the roasting cellar for storing things, the control temperature is under 700～800 ℃, be incubated 2～3 hours, after roasting material cooling, the grinding, be 1000～2000 Ao Situo with magnetic field intensity, the magnetic drum rotating speed be 60～100 turn to/dry type permanent magnetic separator of min carries out magnetic separation, gained contains the magnetic concentrate and is black particle.
Embodiment 1:
Getting open hearth iron-containing dust (main chemical and granularity are listed in table 1 and table 2) Weighing input fills in the pulping tank of process water, modulation concentration is 3～8% ore pulp, squeezing into diameter with mortar pump is φ 75mm, taper angle is in 15 ° the hydrocyclone, giving ore deposit pressure is under the condition of 0.2MPa, overflow in the thin ore pulp inflow settling bath of granularity less than 20 μ m from overflow port, behind the standing sedimentation, abandoning supernatant, throw out places the drying and roasting cellar for storing things, 350 ℃ of insulations 2 hours, dried material was red particle, and its main chemical is listed in table 3.
The granularity of discharging from spigot is that modulation concentration is 25～35% ore pulp, squeezes into a belt chute ore dressing with mortar in the rough slurry inflow storage ore deposit groove of 20～75 μ m, the zone face gradient is 15 °, the belt travelling speed is 1.8m/min, and mineral slurry flux is 3.0L/min, and the washing water yield is 7m
3/ platform .d, hydraulic pressure is 0.05MPa, the iron content crude mineral of gained is placed in the roasting cellar for storing things, 700 ℃ of roasting insulations 3 hours, the roasting material cooling after the grinding, is 2000 Ao Situo with magneticstrength, the magnetic drum rotating speed is that the dry type permanent magnetic separator magnetic separation of 80 commentaries on classics/min promptly gets black particle, and its main chemical is listed in table 4.
Embodiment 2:
Be raw material still, add water and size mixing with the open hearth flue dust, hydroclone classification, the thin ore pulp that overflows from overflow port is incubated 1 hour through sedimentation gained throw out at 400 ℃.Other condition is with embodiment 1.Gained red particle main chemical is listed in table 3.
Squeeze into the belt chute ore dressing from the rough slurry that spigot is discharged after sizing mixing, mineral slurry flux is 3.5L/min, and the washing water yield is 10m
3/ platform .d, gained iron content crude mineral is in 800 ℃ of following roasting insulations 2 hours, roasting material cooling, grinding, magnetic separation.Other condition is with embodiment 1, and gained black particle main chemical is listed in table 4.
Black particle carries out testing partial performances through Ministry of Metallurgical Industry's boilers and pressure vessel safety verification Technical Research Center, magnetic weighing average out to 10.5 grams, granularity of magnet powder is greater than 300 orders, all be higher than " Steel Pressure Vessels magnetic-particle inspection " standard JB3965-85 set quota: magnetic is greater than 7 grams, and granularity is greater than 200 purpose requirements.In magnetic powder flaw detector, sensitivity test piece, under the identical condition such as preparation magnetic flaw detection ink used liquid medium, compare test with homemade like product with its black particle, the magnetic trace display resolution (being sensitivity) of this magnetic is higher than like product.Its magnetic index is as follows: saturated magnetic strength: 0.355 tesla, remanent magnetism: 0.0451 tesla, HCJ: 7.013 * 10
3(A/m).
Open hearth flue dust main chemical table 1
| Composition | Fe 2O 3 | Feo |
| Content (%) | 86.0～88.0 | 1.8～2.9 |
Claims (8)
1, a kind of production method of magnetic, with the chimney for steel making ash is raw material, through washing, magnetic separation, filtration, addition reaction, filtration, technological process such as wash, dehydrate and prepare red iron oxide and iron oxide black, the invention is characterized in that with fume containing iron from steel smelting be raw material, add water and size mixing, hydroclone classification:
(1) the fine particle ore pulp that overflows from the swirler overflow port staticly settles, and drying precipitate promptly gets red particle, and throw out is if promptly get red iron oxide through high-temperature roasting,
(2) the coarse particles ore pulp of discharging from the swirler spigot, the belt chute ore dressing gets crude mineral and promptly gets black particle through roasting, grinding, dry type magnetic separation.
2, magnetic production method according to claim 1 is characterized in that adding water modulation pulp density and is 3～8%(by weight).
3, magnetic production method according to claim 1, it is characterized in that entering hydrocyclone to give ore deposit pressure be 0.15～0.25MPa.
4, according to claim 1(1) described magnetic production method, the drying temperature that it is characterized in that preparing red particle is 350～400 ℃, soaking time 1～2 hour.
5, according to claim 1(1) described magnetic production method, the maturing temperature that it is characterized in that preparing ferric oxideization is 500～800 ℃, soaking time 2～3 hours.
6, according to claim 1(2) described magnetic production method, the feed ore concentration that it is characterized in that entering belt chute be 25～35%(by weight), mineral slurry flux is 3.0～5.0L/min, the washing water yield is 7～10m
3/ platform .d, hydraulic pressure are 0.05MPa.
7, according to claim 1(2) described magnetic production method, the maturing temperature that it is characterized in that preparing black particle is 700～800 ℃, soaking time 2～3 hours.
8, for finishing preparation equipment hydrocyclone, belt chute and the dry type permanent magnetic separator that task of the present invention adopts, it is characterized in that:
(1) diameter of hydrocyclone is φ 75～125mm, and taper angle is 7～20 °,
(2) the belt chute zone face gradient is 13～17 °, and the belt travelling speed is 1.8m/min,
(3) the permanent magnetic separator magneticstrength is 1000～2000 Ao Situo, and the magnetic drum rotating speed is 60～100 commentaries on classics/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93104466 CN1093682A (en) | 1993-04-15 | 1993-04-15 | Produce the method for magnetic with fume containing iron from steel smelting |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93104466 CN1093682A (en) | 1993-04-15 | 1993-04-15 | Produce the method for magnetic with fume containing iron from steel smelting |
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| CN1093682A true CN1093682A (en) | 1994-10-19 |
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| CN 93104466 Pending CN1093682A (en) | 1993-04-15 | 1993-04-15 | Produce the method for magnetic with fume containing iron from steel smelting |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1301806C (en) * | 2003-06-17 | 2007-02-28 | 唐山钢铁股份有限公司 | Technique for separating iron from blast furnace gas mire and specified magnetic separator |
| CN1616553B (en) * | 2004-09-15 | 2010-07-14 | 胡修权 | Method for preparing iron oxide black and iron oxide red dye using steel-making convertor sludge |
| CN101823018B (en) * | 2009-03-05 | 2013-03-06 | 中国恩菲工程技术有限公司 | Method for selecting chromium from laterite |
-
1993
- 1993-04-15 CN CN 93104466 patent/CN1093682A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1301806C (en) * | 2003-06-17 | 2007-02-28 | 唐山钢铁股份有限公司 | Technique for separating iron from blast furnace gas mire and specified magnetic separator |
| CN1616553B (en) * | 2004-09-15 | 2010-07-14 | 胡修权 | Method for preparing iron oxide black and iron oxide red dye using steel-making convertor sludge |
| CN101823018B (en) * | 2009-03-05 | 2013-03-06 | 中国恩菲工程技术有限公司 | Method for selecting chromium from laterite |
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