CN86103047A - Process of self-decomposition for vessel slag afterheat - Google Patents
Process of self-decomposition for vessel slag afterheat Download PDFInfo
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- CN86103047A CN86103047A CN86103047.8A CN86103047A CN86103047A CN 86103047 A CN86103047 A CN 86103047A CN 86103047 A CN86103047 A CN 86103047A CN 86103047 A CN86103047 A CN 86103047A
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- slag
- hot slag
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
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- Curing Cements, Concrete, And Artificial Stone (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The present invention relates to afterheat of slags from the solution treatment process, be included in the pending hot slag of placement in the pressurized vessel, then water be sprayed at the surface of hot slag, simultaneously at the quick refrigerative of warm sludge, in container, produce the saturation steam of certain pressure, and then handle with this pressure steam.Treatment process of the present invention all carries out in sealed vessel, improved the operating environment of high temperature, high dust when handling, make full use of waste heat, do not consume energy, and process safety is reliable, treatment time is short, Pulverization ratio, to clear up rate higher, and the slag steel can separate fully, is utilized respectively, have higher economic benefit, treatment facility simply is easy to promote the use of.
Description
The present invention relates to slag treatment, relate in particular to process of self-decomposition for vessel slag afterheat.Be particularly suitable for the processing of solid thermal slag.
In general, one ton of steel of every production will produce about 150-200 kilogram slag.Therefore, how to fully utilize numerous slag and become the problem that people are concerned about.This is at resource reutilization, and aspects such as energy development and environment protection all are significant.Yet because aspects such as fluctuation of the composition of slag and stability, at present a large amount of slags still go out of use because of being not used.In order to effectively utilize slag, extensive and deep research has all been carried out in the home and abroad to this.Disclosed a kind of stabilization method that the warm water in dipping 1-3 week is handled in 60-100 ℃ warm water for the clear 57-42599 of Japanese Patent number.This method treatment time is longer.A kind of steam treatment method of domestic employing: adopt the 95-100 ℃ of normal pressure saturation steam of supplying with by the outside that converter solid black furnace slag was handled 8 hours, solved the caused weathering expansion problem of free calcium oxide in the slag (following represent) basically with fcao.Need consume 28-32.5 kilogram coal but this method is handled one ton of slag, and the treatment time is longer, also needs a cover steam supply device.
The objective of the invention is to improve, a kind of method of utilizing afterheat of slags to make to be sprayed at a large amount of steam treatment slags of its lip-deep current production is provided for this steam treatment method.
Treatment process of the present invention is included in the pending hot slag of converter of placement in the pressurized vessel, then water is sprayed on the surface of hot slag, hot slag is sharply cooling under the cooling of water, and the stress that produces that changes rapidly of this thermograde makes slag produce many cracks.At the quick refrigerative of warm sludge simultaneously, in container, produce the saturation steam of certain pressure, and be adsorbed in the surface of slag soon and infiltrate among the crack that varies in size, react the Ca(OH that reaction generates rapidly) with fcao in the slag
2Expand because solid volume increases to produce, under the effect of this chemically expansible stress, slag is pulverized rapidly,, just can in very short time, reach the purpose of efflorescence and stabilizing treatment through so repeatedly.
Treatment process of the present invention all carries out in sealed vessel, high temperature when having improved processing, the operating environment of high dust, made full use of the waste heat of hot slag, do not consume energy, and avoided melting slag to meet the problem of water blast, process safety is reliable, treatment time is short, and efflorescence is handled the back granularity and accounted for more than 80% of total amount below 20 millimeters, and the slag steel can separate fully, steel scrap can be recovered, slag can be used for building materials or returns use, has high economic benefit, and treatment facility simply is convenient to promote the use of in addition.
Description of drawings
Fig. 1 is the X-ray diffractogram of converter slag sample before and after handling; Before A represents to handle among the figure, after B represents to handle.
Embodiment
Hot solids shape slag from converter, earlier through pre-treatment, be about to the clinker that the bulk clinker is broken into lumpiness≤500 millimeter, its chemical ingredients is shown in table 1, require free calcium oxide (fcao) 〉=3.0(weight in the slag) %, hot slag surface temperature is at 600-950 ℃, fragmentation and satisfactory clinker packed into weigh in the slag ladle, then the clinker of having weighed is put into the pressurized vessel of processing, closing containers is sprayed at water on the hot slag surface, injection flow rate is the 40-60(weight of processed slag amount) %, at the quick refrigerative of warm sludge piece simultaneously, produce the saturation steam of certain pressure in container, vapor pressure is controlled at≤3 kilograms per centimeter
2, look the height of vapor pressure, the treatment time remained on 180-200 minute, made pressure reduce to zero afterwards, took out through explaining the slag of processing by oneself from pressurized vessel.Then, routinely technology sieve, magnetic separation, promptly can be used for building materials, the Additive of agglomerate,＞20 millimeters slag particle, can return the cupola furnace and substitute part lime, fluorite to 10 millimeter through Mechanical Crushing.
The Chemical Composition of explaining the slag of processing through waste heat by oneself is shown in table 1.
Treated converter slag and undressed slag are respectively through petrofacies and X-ray diffraction analysis, and the result shows:
That (1) variation is maximum is fcao.The very strong peak value of d=2.37-2.40 has all illustrated and has contained a large amount of fcao in the slag in a large amount of irregular particle structures that show when being untreated the petrographic analysis of slag and the diffractogram (A among Fig. 1), but in the slag specimen after processing, petrofacies are observed special secondary school and are seen or the accidental fcao of having particle, the peak value of the middle d=2.37-2.40 of diffractogram (B among Fig. 1) weakens greatly even disappears, and has occurred the Ca(OH of very strong d=4.90 simultaneously)
2Characteristic peak, illustrated that fcao has formed Ca(OH through clearing up in a large number in the slag)
2
(2) C
3S isoreactivity mineral are the grown form unanimity before and after handling, and still is tabular, structures such as strip, and its relative content has certain variation, some decline.
(3) RO is constant substantially mutually.This shows that the converter slag of explaining processing through waste heat by oneself is a kind of certain active material that still has, greatly improved the stability of slag owing to fcao in the slag effectively clears up rapidly.
The rate of clearing up is shown in table 2.The rate of clearing up here is meant that fcao forms Ca(OH through clearing up in the slag)
2CaO account for the weight percent of original fcao.Hence one can see that, and the treatment effect of explaining by oneself of the present invention is good, and the rate of clearing up is more than 80%.
The performance that adopts waste heat to explain the mixed cement of processing slag preparation by oneself is shown in table 3.As shown in Table 3, the bessemer furnace slag that waste heat is explained processing by oneself has been basicly stable material, and the cement raw material use of preparing all kinds of cement as certain volume conforms to quality requirements.
Change of granularity before and after converter slag is handled is shown in table 4.
Claims (6)
1, a kind of afterheat of slags that relates to is from the solution treatment process, be included in and place solid black furnace slag in the sealer, passing to the 95-100 ℃ of normal pressure saturation steam of being supplied with by outside vapour source handles, the invention is characterized in that said technology is included in the pending hot slag of placement in the pressurized vessel, then water is sprayed at the surface of hot slag, at the quick refrigerative of hot slag simultaneously, in container, produce the saturation steam of certain pressure, and then handle with this pressure steam.
2, technology according to claim 1, the surface temperature that it is characterized in that said hot slag is 600-950 ℃.
3,, it is characterized in that free calcium oxide (fcao) 〉=3.0(weight in the said slag according to claim 1 and 2 described technologies) %.
4, technology according to claim 1 is characterized in that said hot slag lumpiness≤500 millimeters.
5, technology according to claim 1 is characterized in that said injection flow rate is the 40-60(weight of processed slag amount) %.
6, technology according to claim 1 is characterized in that said vapor pressure is controlled at≤3 kilograms per centimeter
2
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN86103047A CN1014602B (en) | 1986-04-27 | 1986-04-27 | Process of self-decomposition for vessel slag afterheat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN86103047A CN1014602B (en) | 1986-04-27 | 1986-04-27 | Process of self-decomposition for vessel slag afterheat |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN86103047A true CN86103047A (en) | 1987-11-11 |
| CN1014602B CN1014602B (en) | 1991-11-06 |
Family
ID=4801930
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN86103047A Expired CN1014602B (en) | 1986-04-27 | 1986-04-27 | Process of self-decomposition for vessel slag afterheat |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1014602B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011109993A1 (en) * | 2010-03-08 | 2011-09-15 | 中冶建筑研究总院有限公司 | Steel slag self-slaking device using residual heat and pressure and method thereof |
| CN101417866B (en) * | 2007-10-25 | 2012-07-25 | 中国京冶工程技术有限公司 | Solid thermal steel slag residual heat self-solution treatment method in pressure |
| CN103571983A (en) * | 2012-07-24 | 2014-02-12 | 上海宝冶钢渣综合开发实业有限公司 | Autoclaving treatment modification technology for converter steel slag and applications thereof |
-
1986
- 1986-04-27 CN CN86103047A patent/CN1014602B/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101417866B (en) * | 2007-10-25 | 2012-07-25 | 中国京冶工程技术有限公司 | Solid thermal steel slag residual heat self-solution treatment method in pressure |
| WO2011109993A1 (en) * | 2010-03-08 | 2011-09-15 | 中冶建筑研究总院有限公司 | Steel slag self-slaking device using residual heat and pressure and method thereof |
| CN103571983A (en) * | 2012-07-24 | 2014-02-12 | 上海宝冶钢渣综合开发实业有限公司 | Autoclaving treatment modification technology for converter steel slag and applications thereof |
| CN103571983B (en) * | 2012-07-24 | 2016-06-08 | 上海宝冶钢渣综合开发实业有限公司 | Converter steel slag autoclaving process modified technique and application thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1014602B (en) | 1991-11-06 |
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