CN102605115A - 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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- CN102605115A CN102605115A CN2012100741404A CN201210074140A CN102605115A CN 102605115 A CN102605115 A CN 102605115A CN 2012100741404 A CN2012100741404 A CN 2012100741404A CN 201210074140 A CN201210074140 A CN 201210074140A CN 102605115 A CN102605115 A CN 102605115A
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- slag
- ladle
- pelletizer
- steel
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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 processing of high-temperature liquid state ladle residual casting slag (ladle slag).
Background technology
The ladle residual casting slag generally is made up of slag, deoxidation products, refining slag, heat preserving agent etc., and contains the residual molten steel of part.Generally speaking, have one deck skull on the top of the slag, mobile relatively poor.
At present; Most domestic steel mill adopts traditional technology to handle ladle slag, and its flow process is: water steel and finish, pour the ladle residual casting slag into slag ladle; Be transported to hot application groove hot application; Or move the slag field to and turn over slag, after ladle slag to be routed up is cooled off fully again through pound, cut, break, measure such as choosing selects recovery with steel scrap in the slag, tailings is then discarded or flow into individual workship and carry out the wet-milling sorting.The purpose of wet-milling mainly is to reclaim ferro element, and the wet-milling tailings does not utilize basically.The subject matter of above method has: it is bigger to turn in slag, the transport process pollution to operating environment, and treatment cost is than higher; The metallic iron scaling loss is big during cutting processing slag steel, smoke contamination is serious; The tailings utilization is few, and is big for environment pollution.In addition; What also have some steel mills' employings is that slag ladle presets grid method; Its method is: in slag ladle, preset and be used for connecing slag behind the concrete grid again, molten steel is separated the cooling back by grid and is formed the relatively steel slag block of standard in the slag, though this method can reduce slag steel cutting workload with the cutting flue dust, reduce and burn the oxygen iron loss; Improve the slag steel recovery, but the problems such as slag transhipment pollution, tailings exhaust emission of turning over exist still.
At present; Shot is extensively answered as ball blast or shot-peening material--and be used for steel preparation line, steel plate pre-treatment production line, steelwork 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, even particle size distribution, and hardness is suitable, anti-good springiness, toughness strong, shock-resistant (life-span is more than 2000 times).Therefore Chemical Composition, the granularity of shot all receive strict control.The production technique of shot mainly is at present: adopt high-quality steel scrap, alloy, behind electrosmelting, carry out granulation, just can produce qualified shot through repeatedly thermal treatment, screening again, production cost is higher.Generate shot if can carry out granulation, so not only have good social benefit, and also have considerable economic benefit the ladle slag that contains certain molten steel.
Summary of the invention
Problem to be solved by this invention provides a kind of granulated processed method of ladle residual casting slag, makes the ladle residual casting slag generate shot.This kind method not only can reduce slag steel resource loss, reduces steel-making cost, reduces turnover, stores up in the process the pollution of environment, can also effectively improve the ladle slag utility value, realizes benefit optimization.
Ladle residual casting slag granulation of the present invention generates the process method of shot, the steps include: to close ladle nozzle after a) watering steel finishes, and to the liquefying plant top of heating up, the ladle that fascinates after the contraposition is poured ladle slag in the liquefaction heat riser into the ladle handling; B) connect the power supply heat temperature raising of liquefaction heat riser, treat that ladle slag melts intensification fully after, the liquefaction heat riser that fascinates oozes ladle slag; C) ladle slag forms stream strand when strength pelletizer the place ahead freely falls through tundish; Strength pelletizer ejection high velocity air smashes ladle slag stream thigh becomes fine drop; Drop flies with air-flow, and the cold spraying gun ejection of the control air water mixed flow that is arranged in strength pelletizer below simultaneously promotes the ladle slag drop and continues flight, and the ladle slag drop is strengthened cooling; Making small droplets cooled and solidified in flight course is steel grit and little slag ball, prevents to fuse bonding again after drop lands.
Principle of work of the present invention is: because surface tension, density, the viscosity differences of slag and molten steel are very big, so after ladle slag stream thigh is smashed by strength, can balling-up separately.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 to separate steel grit and little slag ball through follow-up program, steel grit can directly utilize as general shot.So this kind method not only can reduce slag steel resource loss, reduce steel-making cost, reduce turnover, store up in the process the pollution of environment, can also effectively improve the ladle slag utility value, realize benefit optimization.Present method both performed to the utilization of residual casting slag at utmost, greatly reduced the production cost of shot again.
Description of drawings
Fig. 1 is the process unit synoptic diagram that ladle residual casting slag granulation of the present invention generates shot.
Embodiment
Ladle slag granulating device in the technology of the present invention is mainly by the intensification liquefying plant 1 that can fascinate, tundish 2, strength pelletizer 3 and control cold spraying gun 4 etc. and constitute.The effect of fascinated liquefaction heat riser 1 wherein is: the heating ladle slag, and make ladle slag (containing Yu Gang) have good flowability, can flow out through tundish equably.The effect of tundish 2 is: controlling flow thigh width and flow velocity, the distance between adjustment ladle slag stream thigh and the strength pelletizer 3.The effect of strength pelletizer 3 is: control air stream outlet speed and shape, ladle slag stream thigh is smashed becomes fine drop, and drop is flown with air-flow.The effect of controlling cold spraying gun 4 is: prolong steel grit, slag carry, strengthen control steel grit, slag ball speed of cooling, prevent that steel grit, slag ball from fusing caking again, improve steel grit, slag ball quality.In order to prevent that tundish 2 and gasification pelletizer 3 from being damaged by the etch of high temperature sludge stream, can be below tundish 2, the top configuration water cooling plant of strength pelletizer 3.
Sorting unit mainly is made up of intermediate bin, drying installation, concentration equipment, purifying plant.The effect of intermediate bin is: feed cooling gas, control steel grit, slag ball low-temperature zone speed of cooling improve steel grit, slag ball quality; The control delivery rate guarantees separating effect.
Ladle residual casting slag granulation of the present invention generates the process method of shot, the steps include: to close ladle nozzle after a) watering steel finishes, and to liquefying plant 1 top of heating up, the ladle 5 that fascinates after the contraposition is poured ladle slag into liquefaction heat riser 1 li with ladle 5 handlings; B) connect the power supply heat temperature raising of liquefaction heat riser 1, treat that ladle slag melts intensification fully after, the liquefaction heat riser 1 that fascinates oozes ladle slag; C) ladle slag forms stream strand when strength pelletizer 3 the place aheads freely fall through tundish 2; Strength pelletizer 3 ejection high velocity airs smash ladle slag stream thigh becomes fine drop; Drop flies with air-flow, and the cold spraying gun 4 ejection air water mixed flows of control that are arranged in strength pelletizer below simultaneously promote the ladle slag drop and continue flight, and the ladle slag drop is strengthened cooling; Making small droplets cooled and solidified in flight course is steel grit and little slag ball, prevents to fuse bonding again after drop lands.
In order to guarantee that better steel grit reaches the inherent requirement of shot; A kind of improvement as the inventive method; Also comprising step d) after the step c): i.e. start-up control cooling system in the process that steel grit, little slag ball land; Base area area slag surface temperature and steel grit kind adjustment cooling intensity make the mechanical property of steel grit satisfy the shot-peening requirement.
Steel grit to be landed, little slag ball mixture are cooled to temperature rating and promptly are collected into intermediate bin with shovel loader or other equipment, and Xiang Cangzhong feeds gas, cooling steel grit, little slag ball mixture.
Treat that steel grit, little slag ball mixture temperature in the intermediate bin drops to normal temperature and promptly open the feed valve that is located at the bottom of the storehouse, emit steel grit, little slag ball mixture is sent online separation system to through belt and carried out sorting.The steel grit of selecting can be used as general shot and directly uses, and also can be divided into comminuted steel shot and shot according to concrete needs through further purifying, screening.Comminuted steel shot and shot are pressed the storage of composition class wrapping, confirm directly to utilize or carry out further processing treatment according to quality and purposes then, make shot-peening or alloy iron powder respectively by the physics and chemistry characteristic.Wherein second-rate steel grit returns converter or Electric furnace steel making.The little slag ball of selecting can according to chemical composition be classified into storage and deposit subsequent usely, makes steel-making flux or raw materials for sintering and uses.
The characteristics of process method of the present invention are: 1, directly the high-temperature steel cinder inclusion carried out carrying out granulation production steel grit and little slag ball after the heat temperature raising liquefaction, and less energy consumption, cost is low; 2,, improve granulated processed rate under the ladle slag thermal through heat temperature raising to the high-temperature steel cinder inclusion; 3, spraying gun is set, strengthens controlled chilling, prevent that steel grit, little slag ball from fusing caking again, prevent to cool off too fast steel grit, the little slag ball quality of influencing simultaneously; 4, intermediate bin is set, control steel grit, slag ball low-temperature zone speed of cooling improve steel grit, little slag ball quality.
The advantage of process method of the present invention is: 1, energy-conservation; 2, realize the ladle slag high value added utilization; 3, slag steel resource is directly recycled, and reduces resource loss; 4, tailings is made steel-making flux, realizes that tailings really and effectively utilizes, and reduces steel-making cost simultaneously; 5, slag does not land in the treating processes, and environmental pollution is little; 6, reduce the slag field and take up an area of, reduce environmental pollution, reduce processing cost; 7, ladle slag processing and utilization are to realize one of important component part of slag " zero release "; 8, direct production product when handling ladle slag, middle-chain is few, and the circulation radius is little, pollutes and lacks, high efficiency.
Claims (3)
1. ladle residual casting slag granulation generates the process method of shot, the steps include: to close ladle nozzle after a) watering steel finishes, and to the liquefying plant top of heating up, the ladle that fascinates after the contraposition is poured ladle slag in the liquefaction heat riser into the ladle handling; B) connect the power supply heat temperature raising of liquefaction heat riser, treat that ladle slag melts intensification fully after, the liquefaction heat riser that fascinates oozes ladle slag; C) ladle slag forms stream strand when strength pelletizer the place ahead freely falls through tundish; Strength pelletizer ejection high velocity air smashes ladle slag stream thigh becomes fine drop; Drop flies with air-flow, and the cold spraying gun ejection of the control air water mixed flow that is arranged in strength pelletizer below simultaneously promotes the ladle slag drop and continues flight, and the ladle slag drop is strengthened cooling; Making small droplets cooled and solidified in flight course is steel grit and little slag ball, prevents to fuse bonding again after drop lands.
2. process method according to claim 1; It is characterized in that: also comprise step d) after the step c): i.e. start-up control cooling system in the process that steel grit, little slag ball land; Base area area slag surface temperature and steel grit kind adjustment cooling intensity make the mechanical property of steel grit satisfy the shot-peening requirement.
3. process method according to claim 1 and 2 is characterized in that: the air stream outlet speed of strength pelletizer in the step c)>300m/s.
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 |
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| 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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| CN102605115A true CN102605115A (en) | 2012-07-25 |
| CN102605115B CN102605115B (en) | 2014-12-17 |
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Cited By (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 |
| 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 |
| 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 |
| CN110643757A (en) * | 2018-06-26 | 2020-01-03 | 宝山钢铁股份有限公司 | Hot-state casting residue treatment system |
| CN113333763A (en) * | 2021-05-19 | 2021-09-03 | 永康市仁合五金制品有限公司 | 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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Cited By (9)
| 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 |
| CN110643757A (en) * | 2018-06-26 | 2020-01-03 | 宝山钢铁股份有限公司 | Hot-state casting residue treatment system |
| 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 |
| CN113333763A (en) * | 2021-05-19 | 2021-09-03 | 永康市仁合五金制品有限公司 | 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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