CN104946853A - Metallurgy lime powder utilization system and technology method - Google Patents
Metallurgy lime powder utilization system and technology method Download PDFInfo
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- CN104946853A CN104946853A CN201510417136.7A CN201510417136A CN104946853A CN 104946853 A CN104946853 A CN 104946853A CN 201510417136 A CN201510417136 A CN 201510417136A CN 104946853 A CN104946853 A CN 104946853A
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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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Abstract
The invention discloses a metallurgy lime powder utilization system and a technology method. The system and the technology method are mainly designed for effective recycling of lime powder in the metallurgy process. The metallurgy lime powder utilization system comprises a vibrating sieve, a lime powder ball press and a lime powder conveying unit, wherein the vibrating sieve is arranged on a lime raw material supply section and used for screening lime powder with the grain size smaller than 5 mm; the lime powder ball press is used for performing ball pressing on lime powder, and the lime powder conveying unit is used for communicating the vibrating sieve and the lime powder ball press. The lime powder conveying unit conveys the lime powder screened out by the vibrating sieve to the lime powder ball press, the lime powder ball press carries out ball pressing on the lime powder so that lime balls with the grain size being 20-40 mm and the special gravity being 1.9-2.2 t/m<3> can be obtained, and the lime balls are returned for steel making. The lime powder for metallurgy and with the grain size smaller than 50 mm is separated, recycled and used. Meanwhile, negative effects of the lime powder in the steel making and producing process are also avoided.
Description
Technical field
The present invention relates to a kind of metallurgy lime powder and utilize system and processing method.
Background technology
Iron and steel enterprise is the basic industry of national economy, and under the situation of national economy fast development, output of steel improves constantly in recent years, and China's crude steel output of 2013 reaches 7.79 hundred million tons, accounts for global crude steel output 48.48%.Along with " 3R " design concept be rooted in the hearts of the people and steel mill to slag recycle, reduce production cost understanding promote, steel-making derivative (recycle as slag, dedusting ash, mud etc. obtains user and more and more payes attention to.Meanwhile, people often have ignored the high flow rate that bulk raw materials characteristic is brought.
Metallurgy lime, as the necessary main bulk raw materials of a kind of STEELMAKING PRODUCTION, STEELMAKING PRODUCTION " slag former " commonly used, its Main Function is as follows:
(1 the carrying out being conducive to liquid steel dephosphorization in steel melting furnace, desulphurization reaction;
(2 secondary oxidations preventing molten steel;
(3 are conducive to protecting the basic lining of steel melting furnace, formed certain basicity slag (general finishing slag degree of subtracting requirement about 3.5, the acidic substance generated after reducing [Si] oxidation in molten iron are to the erosion of furnace lining;
(4, as the white slag agent of refining furnace as LF stove formation high alkalinity, are conducive to the carrying out of liquid steel refining desulphurization reaction.
Steel-making is also the process of a slag making in a sense, and the importance of metallurgy lime progressively obtains attention and the cognition of people.Lime not only affects smelting molten steel and refining process, but also directly affects the final quality of molten steel.Extensively adopt that quality better, reaction are fast in the world, slag making thoroughly high-quality " quickened lime " (activity degree is greater than 300, the slag making speed accelerating steel melting furnace, the smelting cycle shortening steel melting furnace, reduction lime loss per ton steel (reduce lime consumption amount ~ 15%, improve dephosphorization efficiency, reduce to be mingled with and bring into, substantially increase the quality of molten steel, bring good economic benefit and social benefit to enterprise.
However, the consumption of the lime of STEELMAKING PRODUCTION generally maintains 40 ~ 60kg/t molten steel and puts down, higher for a long time, is one of important indicator affecting STEELMAKING PRODUCTION cost.The major reason studying carefully its comparatively high consumption is except the activity degree of lime itself is lower, also there is a certain proportion of powder in metallurgy lime, this part lime powder enters primary dedusting system and is eliminated in reinforced process, lime consumption in slag former is increased, causes the production cost of steel-making to increase.
Summary of the invention
For the problems referred to above, the invention provides a kind of metallurgy lime powder effective utilization system that can make full use of the lime powder in metallurgical technology process and processing method.
For achieving the above object, metallurgy lime powder effective utilization system of the present invention, comprise the vibratory screening apparatus for the following lime powder of Sieving and casing 5mm be arranged in lime raw material supply section, described lime powder carried out to the lime powder delivery unit of the lime powder ball press of pressure ball operation and the vibratory screening apparatus described in connection and lime ball press, wherein, the lime powder that described Vibration Screen separates is transported to lime powder ball press by described lime powder delivery unit, described lime powder ball press carries out pressure ball operation to described lime powder, obtaining granularity is 20mm ~ 40mm, and proportion is 1.9 ~ 2.2t/m
3lime ball.
Further, described vibratory screening apparatus is arranged on finished belt machine tail place, limestone kiln or steel melting furnace and falls apart shape material feeding system running station place.
Further, described lime powder delivery unit comprises the discharger slip awaing tube be communicated with the sieve material mouth of described vibratory screening apparatus, the lime powder storage silo being communicated with described discharger slip awaing tube discharge port, wherein, the lime powder that described Vibration Screen separates exports described lime powder intermediate storage storehouse to by discharger slip awaing tube, and described lime powder is exported to the feed(raw material)inlet of described lime powder ball press by lime powder intermediate storage storehouse by the 3rd belt pulley.
Further, described lime powder ball press is roller briquetting machine, comprise that a pair axis is parallel to each other, diameter is identical, have gap to each other, each described cylinder shape wheel has some shapes are identical with size, half ball-and-socket of queueing discipline, described cylinder shape wheel, under the driving of motor, with constant speed, rotates backward, lime powder adopts spiral quantitative feeding style evenly to enter cylinder shape wheel district described in two, lime powder between two cylinder shapes wheels at the lime ball of junction pressurized, compression, compression moulding.
Further, also comprise lime ball transportation unit, described lime ball delivery unit comprises lime ball finished bin and transports the dump truck of the lime ball that the outlet of lime ball finished bin exports, the output terminal of the pressure ball finished product output belt of described lime ball press arranges the 4th rotary conveyor, and described lime ball is transported to described lime ball finished bin by the 4th conveyor.
For achieving the above object, metallurgy lime powder efficiency utilization processing method of the present invention, described processing method comprises: be separated by following for particle diameter 5mm in lime raw material supply section lime powder and be transported to lime powder ball press, described lime powder carries out pressure ball operation to described lime powder, obtaining granularity is 20mm ~ 40mm, and proportion is 1.9 ~ 2.2t/m
3lime ball.
Further, also comprise that described lime ball to be transported to ground blanking bin for subsequent use, or lime ball is used for steel melting furnace or refining furnace uses.
Metallurgy lime powder effective utilization system of the present invention, vibratory screening apparatus is set up in finished product district, limestone kiln or the loose shape material charging belt transit zone of steel-making at metallurgy lime, lime powder is effectively separated by vibratory screening apparatus, control the granularity (5 ~ 40mm) of the lime needed for STEELMAKING PRODUCTION, thus improve the activity degree of lime needed for STEELMAKING PRODUCTION, slagging speed.
Metallurgy lime powder effective utilization system of the present invention, lime powder ball press is adopted to carry out pressure ball operation to lime powder, lime ball returns steel melting furnace or refining furnace slag making uses, and reduces the lime loss per ton steel index of smelting and refining procedure well, reaches the object of cost efficiency.
Metallurgy lime powder effective utilization system of the present invention, one-time investment cost and long-time running cost lower, only need increase relevant device.
Accompanying drawing explanation
Fig. 1 is that metallurgy lime powder of the present invention utilizes system architecture schematic diagram.
Embodiment
Below in conjunction with accompanying drawing, the present invention will be further described.
Metallurgy lime powder of the present invention utilize system and processing method general overview as follows:
1, metallurgy lime screening and transhipment
Generally there is the lime powder (below granularity 5mm) of about 5% ~ 10% in metallurgy lime used of making steel, this part lime as slag former add fashionable be easy to by one-time dedusting blower negative pressure absorb enter primary dedusting system eliminate, thus add the loss per ton steel of lime.
Vibratory screening apparatus is set up by the shape feeding system transfer point that falls apart at limestone kiln finished belt machine tail or steel melting furnace, lime powder below 5mm granularity is separated from raw material supply section, make steel melting furnace smelt needed for lime Task-size Controlling in 5 ~ 40mm scope, reduce metallurgy lime volatile consumption.In addition, the lime powder below 5mm granularity is separated and enters lime powder intermediate bin, then enters ball press technique section by conveyor transfer, realizes on-line continuous pressure ball.
2, lime powder pressure ball
The pressure ball of the lime powder of below 5mm adopts high pressure powder ball press to carry out pressure ball operation, the Task-size Controlling of finished product lime ball at 20 ~ 40mm, proportion: 1.9 ~ 2.2t/m
3, meet steel melting furnace or refining furnace completely to put in storage granularity and the requirement of strength of bulk raw materials.Lime ball after the charging of the lime powder of high pressure powder ball press and finished product all passes through belt-conveying.
3, the lime sphere of powder returns using method
Finished product after lime powder pressure ball by Automobile Transportation to ground blanking bin, in the lime bin lime sphere of powder being added steel melting furnace by loose shape material feeding system (conveyor mode or derrick mode or other modes) or independent feed bin.
Finished product after lime powder pressure ball also can by conveyor or the direct handling of crane to the high hopper of refining furnace, the pre-melted slag of its Chang Zuowei LF stove refining or make the uses such as white slag.
Finished product after lime powder pressure ball both can be used as the slag former needed for STEELMAKING PRODUCTION, also can be used as refining furnace such as the white slag composition of LF stove and used, and obviously reduced existing ton steel lime consumption, reduced STEELMAKING PRODUCTION cost.
Principle of work of the present invention: set up vibratory screening apparatus by the shape feeding system transfer point that falls apart at limestone kiln finished belt machine tail or steel melting furnace, the lime powder below 5mm granularity is separated from raw material supply section.Vibratory screening apparatus has two motor in synchrony oppositely to place to make vibrator produce reverse exciting force, forces sieve nest to drive screen cloth to do longitudinal motion, and material is parabolic motion periodically forward by exciting force.Undersize material unloads to lime powder intermediate storage storehouse by discharger slip awaing tube under gravity, and lime powder is transported to lime powder pelletizer by transhipment belt again.Lime ball press adopts roller briquetting machine, has a pair axis to be parallel to each other, diameter is identical, have the cylinder shape of certain interval take turns to each other, and cylinder shape has on taking turns that many shapes are identical with size, half ball-and-socket of queueing discipline.Spiral feeding mode dosing is adopted to ensure that material evenly enters pair roller district.Under the driving of motor, two cylinder shapes wheel, with constant speed, rotates backward, material between two cylinder shapes wheels in junction pressurized, compression.Cylinder shape wheel rotates continuously, the lime ball of final compression moulding starts to expand and departs from, fall into the belt conveyer of bottom, after belt conveyer transhipment, discharging is to lime ball finished bin, lime ball is discharged into dump truck by the discharge valve opening lime ball finished bin, then is transported in loose shape material ground blanking bin or steelshop by the lime sphere of powder by dump truck.
Embodiment 1
The present embodiment metallurgy lime powder effective utilization system, described system comprises the vibratory screening apparatus for the following lime powder of Sieving and casing 5mm be arranged in lime raw material supply section, described lime powder is carried out to the lime powder delivery unit of the lime powder ball press of pressure ball operation and the vibratory screening apparatus described in connection and lime ball press, wherein, the lime powder that described Vibration Screen separates is transported to lime powder ball press by described lime powder delivery unit, described lime powder ball press carries out pressure ball operation to described lime powder, obtaining granularity is 20mm ~ 40mm, and proportion is 1.9 ~ 2.2t/m
3lime ball.Described vibratory screening apparatus is arranged on steel melting furnace bulk cargo feeding system running station place.
Embodiment 2
As shown in Figure 1, the present embodiment metallurgy lime powder effective utilization system, comprise the vibratory screening apparatus for the following lime powder of Sieving and casing 5mm be arranged in lime raw material supply section, described lime powder carried out to the lime powder delivery unit of the lime powder ball press of pressure ball operation and the vibratory screening apparatus described in connection and lime ball press, wherein, the lime powder that described Vibration Screen separates is transported to lime powder ball press by described lime powder delivery unit, described lime powder ball press carries out pressure ball operation to described lime powder, obtaining granularity is 20mm ~ 40mm, and proportion is 1.9 ~ 2.2t/m
3lime ball.Described vibratory screening apparatus is arranged on finished belt machine tail place, limestone kiln.
Described lime powder delivery unit comprises the discharger slip awaing tube be communicated with the sieve material mouth of described vibratory screening apparatus, the lime powder storage silo being communicated with described discharger slip awaing tube discharge port, wherein, the lime powder that described Vibration Screen separates exports described lime powder storage silo to by discharger slip awaing tube, and described lime powder is exported to the feed(raw material)inlet of described lime powder ball press by lime powder storage silo by the 3rd belt pulley.
Described lime ball press is roller briquetting machine, comprise that a pair axis is parallel to each other, diameter is identical, have gap to each other, each described cylinder shape wheel has some shapes are identical with size, half ball-and-socket of queueing discipline, described cylinder shape wheel is under the driving of motor, with constant speed, rotate backward, lime powder adopts spiral quantitative feeding style evenly to enter cylinder shape wheel district described in two, lime powder between two cylinder shapes wheels at the lime ball of junction pressurized, compression, compression moulding.
Described metallurgy lime powder effective utilization system also comprises lime ball transportation unit, described lime ball delivery unit comprises lime ball finished bin and transports the dump truck of the lime ball that the outlet of lime ball finished bin exports, the output terminal of the pressure ball finished product output belt of described lime ball press arranges the 4th rotary conveyor, and described lime ball is transported to described lime ball finished bin by the 4th conveyor.
The present embodiment working process is as follows:
Metallurgy lime is delivered to transfer point region by the first rotary conveyor 1 and carries out transfer, first rotary conveyor 1 discharging is to primary vibration sieve 2, the lime powder of below 5mm unloads to lime powder storage silo 5 as screen underflow by discharger slip awaing tube 4 by vibratory screening apparatus work, the screen overflow of more than 5mm is then transported to the second rotary conveyor 3 by swash plate, transports steelshop to.When pressure ball operation need be carried out, open the discharge valve below lime powder storage silo 5, lime powder is unloaded to lime powder ball press 7 by the 3rd rotary conveyor 6, in ball press, cylinder shape takes turns 8 synchronized reverse rotations, extruding, lime powder is finally pressed into the lime sphere of powder of 20 ~ 40mm, sphere of powder finished product is then exported from lime powder ball press 7 by pressure ball finished product belt conveyor 9, by the 4th rotary conveyor 10, the lime sphere of powder is transported to lime ball finished bin 11 again to store, the lime sphere of powder to be transported in ground blanking bin or steelshop refinery process region for steel melting furnace or refining furnace eventually through dump truck 12, reach the object of cost efficiency.
Embodiment 3
The present embodiment metallurgy lime powder efficiency utilization processing method, metallurgy lime powder efficiency utilization processing method described above is adopted to realize, processing method comprises: be separated by following for particle diameter 5mm in lime raw material supply section lime powder and be transported to lime powder ball press, described lime powder carries out pressure ball operation to described lime powder, obtains granularity to be
proportion is
lime ball.
The present embodiment technical process
Limestone kiln finished belt machine tail or loose shape material feeding system-vibratory screening apparatus (lime powder of screening below 5mm)-discharger slip awaing tube-lime powder intermediate storage storehouse-three conveyor-lime powder ball press-four conveyor-lime ball finished bin-dump truck.
Embodiment illustrates: the vibratory screening apparatus of metallurgy lime under limestone kiln finished belt machine tail or steel-making bulk raw materials feeding system transfer point, the lime powder of below granularity 5mm in screening metallurgy lime.Lime powder is directly unloaded by discharger slip awaing tube and stores to lime powder intermediate storage storehouse temporarily.When needing to carry out pressure ball operation, lime powder is passed through transhipment Belt Conveying in lime ball press receiver bin by lime powder storage silo, lime ball press carries out pressure ball operation by the extruding of a pair synchronized, reverse cylinder shape wheel to the lime powder that spiral transferring is sent here, when the lime ball power that is squeezed disappears, lime ball is separated from ball press.Lime sphere of powder finished product is delivered to lime ball finished bin by feeding system, lime ball finished bin the most at last lime ball is unloaded to dump truck, is transported to the loose shape material ground blanking bin of steel melting furnace or is directly transported in steelshop to meet steel melting furnace or refining furnace use by dump truck.
Metallurgy lime powder efficiency utilization processing method described in the present embodiment, also comprises that described lime ball to be transported to ground blanking bin for subsequent use, or lime ball is used for steel melting furnace or refining furnace uses.
The present embodiment solves the problem that the less lime powder of granularity in metallurgy lime is eliminated by primary dedusting system, is screened out out by lime powder and reach 20 ~ 40mm granularity on the spot after pressure ball to return steel melting furnace or refining furnace uses from lime.Not only one-time investment is few, and producing and manufacturing technique is simple and easy, effectively reduces the production cost of steel-making, and meanwhile, this invention also reduces the substantial resistance that primary dedusting system runs, and effectively ensure that the Effec-tive Function of dust-removal system.
The processing method that this invention is set forth has been successfully applied in first company's 2 × 100t converter steelmaking workshop and second company 3 × 120t converter steelmaking design of workshop, all achieves good economic benefit.
Above; be only preferred embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.Therefore, the protection domain that protection scope of the present invention should define with claim is as the criterion.
Claims (7)
1. a metallurgy lime powder effective utilization system, it is characterized in that: comprise the vibratory screening apparatus for the following lime powder of Sieving and casing 5mm be arranged in lime raw material supply section, described lime powder carried out to the lime powder delivery unit of the lime powder ball press of pressure ball operation and the vibratory screening apparatus described in connection and lime ball press, wherein, the lime powder that described Vibration Screen separates is transported to lime powder ball press by described lime powder delivery unit, described lime powder ball press carries out pressure ball operation to described lime powder, obtaining granularity is 20mm ~ 40mm, and proportion is 1.9 ~ 2.2t/m
3lime ball.
2. metallurgy lime powder effective utilization system according to claim 1, is characterized in that: described vibratory screening apparatus is arranged on finished belt machine tail place, limestone kiln or steel melting furnace and falls apart shape material feeding system running station place.
3. metallurgy lime powder effective utilization system according to claim 1, it is characterized in that: described lime powder delivery unit comprises the discharger slip awaing tube be communicated with the sieve material mouth of described vibratory screening apparatus, the lime powder storage silo being communicated with described discharger slip awaing tube discharge port, wherein, the lime powder that described Vibration Screen separates exports described lime powder intermediate storage storehouse to by discharger slip awaing tube, and described lime powder is exported to the feed(raw material)inlet of described lime powder ball press by lime powder intermediate storage storehouse by the 3rd belt pulley.
4. metallurgy lime powder effective utilization system according to claim 1, it is characterized in that: described lime ball press is roller briquetting machine, comprise a pair axis to be parallel to each other, diameter is identical, there is gap to each other, each described cylinder shape wheel there are some shapes identical with size, half ball-and-socket of queueing discipline, described cylinder shape wheel is under the driving of motor, with constant speed, rotate backward, the cylinder shape that lime powder adopts spiral quantitative feeding style evenly to enter described in two takes turns district, lime powder between two cylinder shapes wheel at junction pressurized, compression, the lime ball of compression moulding.
5. metallurgy lime powder effective utilization system according to claim 1, it is characterized in that: also comprise lime ball transportation unit, described lime ball delivery unit comprises lime ball finished bin and transports the dump truck of the lime ball that the outlet of lime ball finished bin exports, the output terminal of the pressure ball finished product output belt of described lime ball press arranges the 4th rotary conveyor, and described lime ball is transported to described lime ball finished bin by the 4th conveyor.
6. a metallurgy lime powder efficiency utilization processing method, it is characterized in that: described processing method comprises: following for particle diameter 5mm in lime raw material supply section lime powder is separated and is transported to lime powder ball press, described lime powder carries out pressure ball operation to described lime powder, obtaining granularity is 20mm ~ 40mm, and proportion is 1.9 ~ 2.2t/m
3lime ball.
7. metallurgy lime powder efficiency utilization processing method according to claim 6, is characterized in that: also comprise that described lime ball to be transported to ground blanking bin for subsequent use, or lime ball is used for steel melting furnace or refining furnace uses.
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| CN201510417136.7A CN104946853A (en) | 2015-07-15 | 2015-07-15 | Metallurgy lime powder utilization system and technology method |
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| CN201510417136.7A CN104946853A (en) | 2015-07-15 | 2015-07-15 | Metallurgy lime powder utilization system and technology method |
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Cited By (3)
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| CN105437598A (en) * | 2015-11-30 | 2016-03-30 | 洛阳绿仁环保设备有限公司 | Fluorite powder ball press machine |
| CN108191361A (en) * | 2017-12-04 | 2018-06-22 | 但建明 | A kind of anti-crushing drop resistant lime sphere of powder and preparation method thereof |
| CN116393659A (en) * | 2023-03-28 | 2023-07-07 | 青岛佑兴冶金材料有限公司 | Equipment, process and use method for preparing steelmaking accelerator by utilizing aluminum ash |
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| CN104694706A (en) * | 2015-03-23 | 2015-06-10 | 新疆中合大正商贸有限公司 | Application process of calcium oxide carbon balls to LF steel-making |
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| CN104694706A (en) * | 2015-03-23 | 2015-06-10 | 新疆中合大正商贸有限公司 | Application process of calcium oxide carbon balls to LF steel-making |
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| CN105437598A (en) * | 2015-11-30 | 2016-03-30 | 洛阳绿仁环保设备有限公司 | Fluorite powder ball press machine |
| CN108191361A (en) * | 2017-12-04 | 2018-06-22 | 但建明 | A kind of anti-crushing drop resistant lime sphere of powder and preparation method thereof |
| CN116393659A (en) * | 2023-03-28 | 2023-07-07 | 青岛佑兴冶金材料有限公司 | Equipment, process and use method for preparing steelmaking accelerator by utilizing aluminum ash |
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