CN104058609A - Production method of steel slag composite micropowder - Google Patents

Production method of steel slag composite micropowder Download PDF

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Publication number
CN104058609A
CN104058609A CN201410239015.3A CN201410239015A CN104058609A CN 104058609 A CN104058609 A CN 104058609A CN 201410239015 A CN201410239015 A CN 201410239015A CN 104058609 A CN104058609 A CN 104058609A
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CN
China
Prior art keywords
steel slag
slag
steel
blast furnace
production
Prior art date
Application number
CN201410239015.3A
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Chinese (zh)
Inventor
饶磊
周晨辉
张耀辉
马孟臣
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马钢(集团)控股有限公司
马鞍山钢铁股份有限公司
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Priority to CN201410239015.3A priority Critical patent/CN104058609A/en
Publication of CN104058609A publication Critical patent/CN104058609A/en

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Abstract

The invention relates to a production method of steel slag composite micropowder, which comprises the following steps: (1) carrying out magnetic separation on steel slag tailings; (2) proportionally doping the steel slag tailings in the step (1) into hot-state blast furnace slag; (3) carrying out water quenching granulation on the steel slag liquid-state mixture obtained in the step (2); (4) obtaining steel slag; (5) sending the steel slag into a grinding production line; and (6) obtaining the steel slag composite powder product. By utilizing the heat of the blast furnace slag and the advantage of higher SiO2 content, the steel slag tailings with lower iron content subjected to magnetic separation are doped into the hot-state blast furnace slag to modify the steel slag, thereby enhancing the activity of the steel slag and lowering the free CaO content in the steel slag; and in the process, the steel slag and mineral slag are proportionally mixed, thereby completing the steel slag powder production process in one grinder, and lowering the equipment investment cost of the steel slag composite powder.

Description

A kind of steel slag composite micro-powder production method
Technical field
The present invention relates to environmental protection and comprehensive utilization of resources, be specifically related to a kind of steel slag composite micro-powder production method.
Background technology
The waste that slag produces as converter (electric furnace) steel-making, mainly take crushing-magnetic selection to reclaim ferric charge wherein, residue tailings is as material of construction, wherein, utilizing steel slag tailings to produce slag micro powder is that a kind of feasible tailings utilizes mode, and the active relative slag micropowder of micro mist of producing due to steel slag tailings is low, and has certain swelling property, a lot of enterprises are mixed into slag micro powder and slag micropowder pair to mix powder as gelling material, are used in cement and concrete.
At present, domestic steel slag Composite Double is mixed the production technique of powder and is all taked slag and slag in the different systems that grinds, to be finely ground to after powder respectively, then mixes finished product according to a certain percentage.
Publication number is that the patent < < steel slag composite powder of CN102180613 and preparation method thereof > > has described and a kind of bessemer furnace slag and refining slag crushing and grinding obtained to mixture micro mist, blast-furnace slag grinding is obtained to slag micropowder, be mixed to get according to a certain percentage the production technique of steel slag composite powder together with additive.
Publication number is that the patent < < modified steel slag composite admixture of CN102491664 and preparation method thereof > > has described and a kind ofly produces modified steel slag composite admixture after slag micro powder, slag micropowder and sintering desulfuration ash is compound according to a certain percentage.
Summary of the invention
The object of the present invention is to provide a kind of steel slag composite micro-powder production method, the heat that utilizes blast furnace slag with and SiO 2the advantage that content is higher, the lower steel slag tailings of metal Ferrum content after magnetic separation is incorporated in thermal-state blast furnace slag, slag is carried out to modification, improve slag active, reduce slag free CaO content simultaneously, in this process, realize slag and slag is mixed in proportion simultaneously, thereby reach, in a set of grinding machine, complete the technical process that iron and steel ground-slag is produced, reduce the equipment investment cost of steel slag composite powder.Concrete technical scheme is as follows:
A steel slag composite micro-powder production method, comprises the steps:
(1) steel slag magnetically dressing tailings;
(2) the described steel slag tailings of step (1) is incorporated in thermal-state blast furnace slag according to a certain percentage;
(3) steel slag liquid form mixt step (2) being obtained carries out water quenching granulating;
(4) obtain steel slag;
(5) enter and grind production line;
(6) obtain steel slag composite powder product.
Further, in step (2), at tap cinder mouth place, steel slag magnetically dressing tailings is mixed into slag runner with liquid blast furnace together with after thermal-state blast furnace slag is according to the mass ratio mixing of 1:9.
Further, between step (2) and (3), also comprise the steps: in slag runner section through pyroreaction, make free CaO in slag and the SiO in blast furnace slag 2react, reduce the content of free CaO in slag.
Further, step (3), after water quenching granulating, also comprise the steps: granulation steel slag to dry, and screening is broken.
Further, in step (3), by blast furnace water slag-flushing system, steel slag liquid form mixt is carried out to water quenching granulating.
Further, step (4), obtains stable components, free CaO content is low, the steel slag that amount of glassy phase is high.
Further, between step (4) and (5), carry out iron removal by magnetic separation entering before grinding production line.
Further, in step (5), further comprise the steps:
A. carry out pre-grinding;
B. iron removal by magnetic separation;
C. carry out fine grinding;
D. iron removal by magnetic separation.
Compare with currently available technology, the heat that the present invention utilizes blast furnace slag with and SiO 2the advantage that content is higher, the lower steel slag tailings of metal Ferrum content after magnetic separation is incorporated in thermal-state blast furnace slag, slag is carried out to modification, improve slag active, reduce slag free CaO content simultaneously, in this process, realize slag and slag is mixed in proportion simultaneously, thereby reach, in a set of grinding machine, complete the technical process that iron and steel ground-slag is produced, reduce the equipment investment cost of steel slag composite powder.
Specifically:
1 utilizes heat and the high SiO of thermal-state blast furnace slag 2content carries out modification to steel slag tailings, improves slag active, reduces free CaO content in slag;
2 by setting up water channel iron removal step and pre-grinding operation, reclaims ferric charge in steel slag, improves the grindability of steel slag simultaneously;
3 realize steel slag and carry out mixed and modifiedly before entering grinding machine, adopt a set of grinder system just can carry out the production of steel slag composite powder, save cost of investment.
Accompanying drawing explanation
Fig. 1 is process flow sheet of the present invention.
Embodiment
Describe the present invention with reference to the accompanying drawings below, it is a kind of preferred embodiment in numerous embodiments of the present invention.
The technical scheme of the present embodiment be the heat that utilizes blast furnace slag with and SiO 2the advantage that Content is higher, is incorporated into the lower steel slag tailings of metal Ferrum content after magnetic separation in thermal-state blast furnace slag according to a certain percentage, in slag runner section, through pyroreaction, makes free CaO in slag and the SiO in blast furnace slag 2react; reduce the content of free CaO in slag; through blast furnace water slag-flushing system, steel slag liquid form mixt is carried out to water quenching granulating again, obtain stable components, free CaO content is low, the steel slag that amount of glassy phase is high; enter and grind production line; in grinding technology process, by setting up iron removal by magnetic separation operation, reclaim as far as possible the ferric charge in steel slag; the grindability that can improve steel slag simultaneously, concrete technology flow process is as Fig. 1.
At tap cinder mouth place; together with after steel slag magnetically dressing tailings is mixed according to the mass ratio of 1:9 with thermal-state blast furnace slag, with liquid blast furnace, be mixed into slag runner; after water quenching granulating; granulation steel slag is dried; through sieving after fragmentation; before entering pre-grinding operation, carry out iron removal by magnetic separation, after pre-grinding completes, after iron removal by magnetic separation, carry out again fine grinding, after fine grinding completes, through iron removal by magnetic separation, obtain steel slag composite powder product.
The effect of this technology and benefit are mainly reflected in following 3 aspects:
(1) realize steel slag tailings modification and recycling
(2) realize steel slag composite micro-powder production integration, save cost of investment
(3) reclaim the ferric charge in slag iron
To produce 1200000 tons of steel slag composite powders per year, calculate, save approximately 5,000 ten thousand yuan of facility investments;
Steel slag micro mist price per ton is pressed 180 yuan of calculating, approximately 20 yuan of profits per ton, and year is produced a profit 2,400 ten thousand yuan;
Reclaim ferric charge in 0.5% ratio, 0.3 ten thousand tons of recyclable iron fine powders, per tonly press 700 yuan of calculating, can produce a profit 2,100,000 yuan can produce a profit: 2,400 ten thousand+2,100,000=2,610 ten thousand yuan.
By reference to the accompanying drawings the present invention is exemplarily described above; obviously specific implementation of the present invention is not subject to the restrictions described above; as long as the various improvement that adopted method design of the present invention and technical scheme to carry out; or directly apply to other occasion without improvement, all within protection scope of the present invention.

Claims (8)

1. a steel slag composite micro-powder production method, is characterized in that, comprises the steps:
(1) steel slag magnetically dressing tailings;
(2) the described steel slag tailings of step (1) is incorporated in thermal-state blast furnace slag according to a certain percentage;
(3) steel slag liquid form mixt step (2) being obtained carries out water quenching granulating;
(4) obtain steel slag;
(5) enter and grind production line;
(6) obtain steel slag composite powder product.
2. steel slag composite micro-powder production method as claimed in claim 1, it is characterized in that, in step (2), at tap cinder mouth place, steel slag magnetically dressing tailings is mixed into slag runner with liquid blast furnace together with after thermal-state blast furnace slag is according to the mass ratio mixing of 1:9.
3. steel slag composite micro-powder production method as claimed in claim 1 or 2, is characterized in that, also comprises the steps: in slag runner section through pyroreaction between step (2) and (3), makes free CaO in slag and the SiO in blast furnace slag 2react, reduce the content of free CaO in slag.
4. the steel slag composite micro-powder production method as described in any one in claim 1-3, is characterized in that, step (3), after water quenching granulating, also comprise the steps: granulation steel slag to dry, and screening is broken.
5. the steel slag composite micro-powder production method as described in any one in claim 1-4, is characterized in that, in step (3), by blast furnace water slag-flushing system, steel slag liquid form mixt is carried out to water quenching granulating.
6. the steel slag composite micro-powder production method as described in any one in claim 1-5, is characterized in that, step (4) obtains stable components, free CaO content is low, the steel slag that amount of glassy phase is high.
7. the steel slag composite micro-powder production method as described in any one in claim 1-6, is characterized in that, between step (4) and (5), carries out iron removal by magnetic separation entering before grinding production line.
8. the steel slag composite micro-powder production method as described in any one in claim 1-7, is characterized in that, step further comprises the steps: in (5)
A. carry out pre-grinding;
B. iron removal by magnetic separation;
C. carry out fine grinding;
D. iron removal by magnetic separation.
CN201410239015.3A 2014-05-30 2014-05-30 Production method of steel slag composite micropowder CN104058609A (en)

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Cited By (5)

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CN104446021A (en) * 2014-11-26 2015-03-25 攀枝花环业冶金渣开发有限责任公司 Steel and iron slag micro-powder and production method thereof
CN106630693A (en) * 2016-09-19 2017-05-10 石横特钢集团有限公司 Method for producing micropowder by mixing granulated blast-furnace slag and ball-milled steel slag slurry
CN106698979A (en) * 2017-03-14 2017-05-24 江苏沙钢集团有限公司 Sintering desulfurization ash treatment system and method
CN108283992A (en) * 2017-01-13 2018-07-17 宋当建 A kind of electric insulator production and processing ancillary equipment
CN108405076A (en) * 2018-03-06 2018-08-17 攀钢集团攀枝花钢钒有限公司 Vertical mill, carbonization blast furnace slag breaking method and system

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Publication number Priority date Publication date Assignee Title
CN104446021A (en) * 2014-11-26 2015-03-25 攀枝花环业冶金渣开发有限责任公司 Steel and iron slag micro-powder and production method thereof
CN106630693A (en) * 2016-09-19 2017-05-10 石横特钢集团有限公司 Method for producing micropowder by mixing granulated blast-furnace slag and ball-milled steel slag slurry
CN108283992A (en) * 2017-01-13 2018-07-17 宋当建 A kind of electric insulator production and processing ancillary equipment
CN108283992B (en) * 2017-01-13 2020-05-22 湖南湖电电力设备有限公司 Auxiliary equipment for processing ceramic insulator mud of overhead transmission line
CN106698979A (en) * 2017-03-14 2017-05-24 江苏沙钢集团有限公司 Sintering desulfurization ash treatment system and method
CN108405076A (en) * 2018-03-06 2018-08-17 攀钢集团攀枝花钢钒有限公司 Vertical mill, carbonization blast furnace slag breaking method and system

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