CN102605115B - Process method for producing steel shots by ladle-casting slag pelletization - Google Patents
Process method for producing steel shots by ladle-casting slag pelletization Download PDFInfo
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- CN102605115B CN102605115B CN201210074140.4A CN201210074140A CN102605115B CN 102605115 B CN102605115 B CN 102605115B CN 201210074140 A CN201210074140 A CN 201210074140A CN 102605115 B CN102605115 B CN 102605115B
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- slag
- ladle
- steel
- pelletizer
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/02—Physical or chemical treatment of slags
- C21B2400/022—Methods of cooling or quenching molten slag
- C21B2400/024—Methods of cooling or quenching molten slag with the direct use of steam or liquid coolants, e.g. water
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/02—Physical or chemical treatment of slags
- C21B2400/022—Methods of cooling or quenching molten slag
- C21B2400/026—Methods of cooling or quenching molten slag using air, inert gases or removable conductive bodies
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/05—Apparatus features
- C21B2400/062—Jet nozzles or pressurised fluids for cooling, fragmenting or atomising 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
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention discloses a process method for producing steel shots by ladle-casting slag pelletization. The process method comprises the following steps that: a) a ladle nozzle is closed after the steel casting is finished, a ladle is lifted to be above a temperature-rising liquefying device, the ladle is tilted after alignment, and the lade slag is poured into the temperature-rising liquefying device; b) a power supply of the temperature-rising liquefying device is switched-on to heat and increase the temperature, and after the ladle slag is completely molten and the temperature is increased, the temperature-rising liquefying device is tilted to enable the ladle slag to flow out slowly; c) the ladle slag forms stream through a middle flow chute and falls off freely from the front part of a pneumatic pelletizer, the pneumatic pelletizer sprays out high-speed gas flow to crush the ladle slag stream into fine liquid drops, the liquid drops fly along with the gas flow, and simultaneously, a controlled-cooling atomizer distributed below the pneumatic pelletizer sprays out gas-water mixed flow to push liquid drops of the ladle slag to fly continuously and carries out enhanced cooling on the liquid drops of the ladle slag, so that the fine liquid drops are cooled and solidified into steel shots and small slag balls in the flying process, and are prevented from being melted and bonded together after falling to the ground. The method effectively improves the utilization value of the ladle slag.
Description
Technical field
The present invention relates to the online resource process of high-temperature liquid state ladle residual casting slag (ladle slag).
Background technology
Ladle residual casting slag is generally made up of slag, deoxidation products, refining slag, heat preserving agent etc., and containing part residual molten steel.Generally, the top of the slag has one deck skull, mobility is poor.
At present, most domestic steel mill adopts traditional technology process ladle slag, its flow process is: water steel complete, pour ladle residual casting slag into slag ladle, be transported to hot application groove hot application, or move slag field to and turn over slag, after the ladle slag routed up cools completely again by pounding, cutting, break, steel scrap in slag selected recovery by the measure such as choosing, tailings is then discarded or flow into individual workship and carry out wet-milling sorting.The object of wet-milling mainly reclaims ferro element, and wet-milling tailings there is no utilization.The subject matter of above method has: turn in slag, transport process comparatively large to the pollution of operating environment, treatment cost is higher; During cutting processing slag steel, metallic iron scaling loss is large, smoke contamination is serious; Tailings utilizes few, big for environment pollution.In addition, what also have some steel mills to adopt is the preset grid method of slag ladle, its method is: be used for after preset concrete grating connecing slag in slag ladle again, in slag, molten steel forms the steel slag block comparing specification after being separated cooling by grid, although the method can reduce slag steel cutting workload and cutting flue dust, reduce and burn oxygen iron loss, improve the slag steel rate of recovery, but the problems such as slag transhipment pollution, tailings exhaust emission of turning over still exist.
At present, shot, as ball blast or shot-peening material, is extensively answered--and for steel preparation line, production line for preprocessing steel plate, steel construction pre-treatment production line etc., the metallic surface degree of cleaning of wherethrough reason improve, surfaceness increases, and the surface adhesion force of application is improved.The specification of quality of shot is that interior tissue is tight, and even particle size distribution, hardness is suitable, least good, toughness strong, shock-resistant (life-span more than 2000 times).Therefore the Chemical Composition of shot, granularity are all strictly controlled.The production technique of current shot is mainly: adopt high-quality steel scrap, alloy, and after electrosmelting, carry out being granulated, just producing qualified shot through repeatedly thermal treatment, screening again, production cost is higher.If granulation can be carried out to the ladle slag containing certain molten steel generate shot, so not only there is good social benefit, and also have considerable economic benefit.
Summary of the invention
Problem to be solved by this invention is to provide a kind of granulated processed method of ladle residual casting slag, makes ladle residual casting slag generate shot.This kind of method can not only reduce slag steel resource loss, reduces steel-making cost, reduces turnover, stores up the pollution to environment in process, can also effectively improve ladle slag utility value, realize benefit optimization.
Ladle residual casting slag granulation of the present invention generates the processing method of shot, closes ladle nozzle after the steps include: a) to water steel, and above ladle handling to warming liquid gasifying device, contraposition backward motion ladle, pours into ladle slag in liquefaction heat riser; B) connect the power supply heat temperature raising of liquefaction heat riser, after ladle slag melts intensification completely, the liquefaction heat riser that fascinates makes ladle slag ooze; C) ladle slag is when tundish formation stream stock freely falls from strength pelletizer front; ladle slag stream stock smashes and becomes fine drop by strength pelletizer ejection high velocity air; drop flies with air-flow; the control cold spraying gun ejection mixing wastewater with air stream be simultaneously arranged in below strength pelletizer promotes ladle slag drop and continues flight; and strengthening cooling is carried out to ladle slag drop; make small droplets cooled and solidified in flight course be steel grit and little slag ball, after preventing drop to land, again fuse bonding.
Principle of work of the present invention is: because the surface tension of slag and molten steel, density, viscosity differences are very large, so after ladle slag stream stock smashed by strength, and can respective balling-up.Therefore present method makes high-temperature liquid state ladle residual casting slag after granulated processed, forms the mixture of steel grit and little slag ball.And then utilizing sorting unit that steel grit and little slag ball are separated by follow-up program, steel grit can directly utilize as general shot.So this kind of method can not only reduce slag steel resource loss, reduce steel-making cost, reduce turnover, store up the pollution to environment in process, can also effectively improve ladle slag utility value, realize benefit optimization.The utilization of residual casting slag both performed at utmost by present method, greatly reduced again the production cost of shot.
Accompanying drawing explanation
Fig. 1 is the process unit schematic diagram that ladle residual casting slag of the present invention granulation generates shot.
Embodiment
Ladle slag granulating device in present invention process is primarily of the warming liquid gasifying device 1 that can fascinate, tundish 2, strength pelletizer 3 and control the formations such as cold spraying gun 4.The effect of fascinated liquefaction heat riser 1 is wherein: heating ladle slag, makes ladle slag (containing remaining steel) have good mobility, can flow out uniformly across tundish.The effect of tundish 2 is: control flow check stock width and flow velocity, the distance between adjustment ladle slag stream stock and strength pelletizer 3.The effect of strength pelletizer 3 is: control air stream outlet speed and shape, smashed by ladle slag stream stock and become fine drop, drop is flown with air-flow.The effect controlling cold spraying gun 4 is: extend steel grit, slag carry, intensive control steel grit, slag ball speed of cooling, prevent steel grit, slag ball fuses caking again, improves steel grit, slag ball quality.In order to prevent tundish 2 and gasification pelletizer 3 from being damaged by the etch of high temperature sludge stream, below tundish 2, above strength pelletizer 3, water cooling plant can be configured.
Sorting unit is primarily of intermediate bin, drying installation, concentration equipment, purifying plant composition.The effect of intermediate bin is: pass into cooling gas, controls steel grit, slag ball low-temperature zone speed of cooling, improves steel grit, slag ball quality; Control delivery rate, ensure separating effect.
Ladle residual casting slag granulation of the present invention generates the processing method of shot, closes ladle nozzle after the steps include: a) to water steel, and above ladle 5 handling to warming liquid gasifying device 1, contraposition backward motion ladle 5, pours liquefaction heat riser 1 li into ladle slag; B) connect the power supply heat temperature raising of liquefaction heat riser 1, after ladle slag melts intensification completely, the liquefaction heat riser 1 that fascinates makes ladle slag ooze; C) ladle slag is when tundish 2 formation stream stock freely falls from strength pelletizer 3 front; strength pelletizer 3 sprays high velocity air and is smashed by ladle slag stream stock and become fine drop; drop flies with air-flow; the cold spraying gun 4 of control be simultaneously arranged in below strength pelletizer sprays mixing wastewater with air stream and promotes ladle slag drop continuation flight; and strengthening cooling is carried out to ladle slag drop; make small droplets cooled and solidified in flight course be steel grit and little slag ball, after preventing drop to land, again fuse bonding.
In order to ensure that steel grit reaches the inherent requirement of shot better, one as the inventive method is improved, also step d) is comprised: in the process of namely landing at steel grit, little slag ball, start Controlled cooling system after step c), base area area slag surface temperature and steel grit rolled product variety adjustment cooling intensity, make the mechanical property of steel grit meet shot-peening requirement.
Steel grit to be landed, little slag ball mixture are cooled to temperature rating to be namely collected into intermediate bin with shovel loader or other equipment, and Xiang Cangzhong passes into gas, cooling steel grit, little slag ball mixture.
Treat the steel grit in intermediate bin, little slag ball mixture temperature drops to normal temperature and namely open the feed valve be located at the bottom of storehouse, release steel grit, little slag ball mixture sends online separation system to by belt and carry out sorting.The steel grit selected directly can use as general shot, also according to concrete needs through purifying further, screening, can be divided into comminuted steel shot and shot.Comminuted steel shot and shot are pressed composition class wrapping and are stored, and then determine directly to utilize or carry out further processing treatment according to quality and purposes, make shot-peening or alloy iron powder respectively by physicochemical property.Wherein second-rate steel grit returns converter or Electric furnace steel making.The little slag ball selected can according to chemical composition be classified into storehouse and store for future use, and does steel-making flux or raw materials for sintering use.
The feature of present invention process method is: 1, directly carry out heat temperature raising post liquefaction to high-temperature steel cinder inclusion and carry out granulation production steel grit and little slag ball, less energy consumption, cost is low; 2, by the heat temperature raising to high-temperature steel cinder inclusion, granulated processed rate under raising ladle slag thermal; 3, arrange spraying gun, intensive control cools, and prevents steel grit, little slag ball fuses caking again, and prevent from cooling too fastly affects steel grit, little slag ball quality simultaneously; 4, intermediate bin is set, controls steel grit, slag ball low-temperature zone speed of cooling, improve steel grit, little slag ball quality.
The advantage of present invention process method is: 1, energy-conservation; 2, ladle slag high value added utilization is realized; 3, slag steel resource is directly recycled, and reduces resource loss; 4, tailings makes steel-making flux, realizes tailings and really and effectively utilizes, reduce steel-making cost simultaneously; 5, in treating processes, slag does not land, and environmental pollution is little; 6, reduce slag field to take up an area, reduce environmental pollution, reduce processing cost; 7, ladle slag process and utilization are one of important component parts realizing slag " zero release "; 8, the direct production product when processing ladle slag, middle-chain is few, and circulation radius is little, pollutes few, high efficiency.
Claims (2)
1. ladle residual casting slag granulation generates the processing method of shot, closes ladle nozzle after the steps include: a) to water steel, and above ladle handling to warming liquid gasifying device, contraposition backward motion ladle, pours into ladle slag in liquefaction heat riser; B) connect the power supply heat temperature raising of liquefaction heat riser, after ladle slag melts intensification completely, the liquefaction heat riser that fascinates makes ladle slag ooze; C) ladle slag is when tundish formation stream stock freely falls from strength pelletizer front, ladle slag stream stock smashes and becomes fine drop by strength pelletizer ejection high velocity air, drop flies with air-flow, the control cold spraying gun ejection mixing wastewater with air stream be simultaneously arranged in below strength pelletizer promotes ladle slag drop and continues flight, and strengthening cooling is carried out to ladle slag drop, make small droplets cooled and solidified in flight course be steel grit and little slag ball, after preventing drop to land, again fuse bonding; Start Controlled cooling system in the process of d) landing at steel grit, little slag ball, base area area slag surface temperature and steel grit rolled product variety adjustment cooling intensity, make the mechanical property of steel grit meet shot-peening requirement.
2. processing method according to claim 1, is characterized in that: the air stream outlet speed >300m/s of strength pelletizer in step c).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210074140.4A CN102605115B (en) | 2011-11-16 | 2012-03-20 | Process method for producing steel shots by ladle-casting slag pelletization |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110362276.0 | 2011-11-16 | ||
| CN201110362276 | 2011-11-16 | ||
| CN201210074140.4A CN102605115B (en) | 2011-11-16 | 2012-03-20 | Process method for producing steel shots by ladle-casting slag pelletization |
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| Publication Number | Publication Date |
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| CN102605115A CN102605115A (en) | 2012-07-25 |
| CN102605115B true CN102605115B (en) | 2014-12-17 |
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| CN201210074140.4A Active CN102605115B (en) | 2011-11-16 | 2012-03-20 | Process method for producing steel shots by ladle-casting slag pelletization |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102808050A (en) * | 2012-09-06 | 2012-12-05 | 马钢(集团)控股有限公司 | Steel slag wind-crushing and hydro-cooling treating device and method for treating steel slag |
| CN104118985A (en) * | 2014-07-24 | 2014-10-29 | 河北钢铁股份有限公司承德分公司 | Device capable of directly recycling high-temperature vanadium-titanium molten slag |
| CN108220510A (en) * | 2016-12-14 | 2018-06-29 | 宝山钢铁股份有限公司 | Hot casting residue processing method based on multimedium coupling |
| CN107572359A (en) * | 2017-10-19 | 2018-01-12 | 山西太钢不锈钢股份有限公司 | A kind of method of slag ladle hook |
| CN110643757B (en) * | 2018-06-26 | 2022-07-19 | 宝山钢铁股份有限公司 | Processing method of thermal state casting slag processing system |
| CN113333763B (en) * | 2021-05-19 | 2023-04-25 | 肥城青正工贸有限公司 | Steel shot casting method |
| CN114231674A (en) * | 2021-11-26 | 2022-03-25 | 凉山瑞京环保资源开发有限公司 | Liquid casting residue treatment process |
| CN114249539A (en) * | 2021-11-26 | 2022-03-29 | 凉山瑞京环保资源开发有限公司 | Method for treating fluid liquid casting slag |
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| CN1453386A (en) * | 2002-04-28 | 2003-11-05 | 舒克东 | Stainless steel ball |
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| CN201634691U (en) * | 2009-08-29 | 2010-11-17 | 马鞍山钢铁股份有限公司 | Melting steel slag particle atomization water-cooling device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61231108A (en) * | 1985-04-05 | 1986-10-15 | Nippon Jiryoku Senko Kk | Production of steel shot |
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2012
- 2012-03-20 CN CN201210074140.4A patent/CN102605115B/en active Active
Patent Citations (5)
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| CN1330158A (en) * | 2001-06-28 | 2002-01-09 | 上海宝钢冶金建设公司宝钢协力生产分公司 | Process for preparing abradant to derust steel slegs of converter |
| CN1453386A (en) * | 2002-04-28 | 2003-11-05 | 舒克东 | Stainless steel ball |
| CN101301683A (en) * | 2007-05-09 | 2008-11-12 | 山东传洋金属磨料有限公司 | Method for producing martensite cast steel ball |
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| CN102605115A (en) | 2012-07-25 |
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